Journal articles: 'PV park'

1

Board, Editorial. "The National Maine Monument, 1913." Public Voices 7, no. 1 (December 12, 2016): 1. http://dx.doi.org/10.22140/pv.191.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Alawasa, Khaled M., Rashid S. AlAbri, Amer S. Al-Hinai, Mohammed H. Albadi, and Abdullah H. Al-Badi. "Experimental Study on the Effect of Dust Deposition on a Car Park Photovoltaic System with Different Cleaning Cycles." Sustainability 13, no. 14 (July 8, 2021): 7636. http://dx.doi.org/10.3390/su13147636.

Full text

Abstract:

For a decade, investments in solar photovoltaic (PV) systems have been increasing exponentially in the Middle East. Broadly speaking, these investments have been facing tremendous challenges due to the harsh weather in this particular part of the world. Dust accumulation is one the challenges that negatively affects the performance of solar PV systems. The overall goal of this paper is to thoroughly investigate the effect of dust accumulation on the energy yield of car park PV systems. With this aim in mind, the paper presents scientific values for further research and opens the horizon for attracting further investments in solar PV systems. This study is based on a real PV system in the Sultanate of Oman and considers different cleaning cycles for 16 months (from 29 July 2018 to 10 November 2019). Furthermore, four different PV groups were assessed, and the system was monitored under different cleaning frequencies. In general, it was found that dust accumulation has a significant impact; under 29-day, 32-day, 72-day, and 98-day cleaning cycles, the average percentages of energy loss due to soiling were 9.5%, 18.2%, 31.13%, and 45.6%, respectively. In addition, the dust effect has a seasonal variation. The study revealed that dust accumulation has a more negative impact during summer than during winter. During summer, the energy losses due to soiling were 8.7% higher than those during winter. The difference was attributed to different environmental conditions, with high humidity and low wind speed being the main factors that worsen the impact of dust during summer. Based on the findings of this research, a monthly cleaning program is highly recommended in the city of Muscat.

APA, Harvard, Vancouver, ISO, and other styles

3

Coleman, J. E., L. N. Franks, and M. D. Berry. "THE TECHNICAL, ENVIRONMENTAL AND CULTURAL CHALLENGES OF DRILLING ON THE EDGE OF A NATIONAL PARK." APPEA Journal 45, no. 1 (2005): 535. http://dx.doi.org/10.1071/aj04041.

Full text

Abstract:

Magellan Petroleum, operator of the Palm Valley Gas Field, successfully drilled the Palm Valley–11 (PV–11) gas development well situated on aboriginal land adjacent to the Finke Gorge National Park, Central Australia. The drilling site was located within the Palm Creek catchment area, an environmentally significant and internationally renowned area which feeds the rare and endangered red cabbage palm (Livistona mariae).Although no commercial gas flow was encountered, the well was a success in terms of the technical, environmental and cultural heritage challenges faced during the 71-day drilling program.Several mitigation measures not generally required in petroleum drilling operations were incorporated in the PV–11 Drilling Program and Environmental Management Plan (EMP).This paper describes the Commonwealth and Northern Territory approval processes required to ensure all risks were identified and addressed; the challenges of drilling the PV–11 well using under-balanced techniques in difficult conditions; and the mitigation measures adopted to address these challenges.

APA, Harvard, Vancouver, ISO, and other styles

4

Nash, C., J. Clough, D. Gedge, R. Lindsay, D. Newport, M. A. Ciupala, and S. Connop. "Initial insights on the biodiversity potential of biosolar roofs: a London Olympic Park green roof case study." Israel Journal of Ecology and Evolution 62, no. 1-2 (April 12, 2016): 74–87. http://dx.doi.org/10.1080/15659801.2015.1045791.

Full text

Abstract:

Cities dominated by impervious artificial surfaces can experience a multitude of negative environmental impacts. Restoration of green infrastructure has been identified as a mechanism for increasing urban resilience, enabling cities to transition towards sustainable futures in the face of climate-driven change. Building rooftops represent a viable space for integrating new green infrastructure into high-density urban areas. Urban rooftops also provide prime locations for photovoltaic (PV) systems. There is an increasing recognition that these two technologies can be combined to deliver reciprocal benefits in terms of energy efficiency and biodiversity targets. Scarcity of scientific evaluation of the interaction between PVs and green roofs means that the potential benefits are currently poorly understood. This study documents evidence from a biodiversity monitoring study of a substantial biosolar roof installed in the Queen Elizabeth Olympic Park. Vegetation and invertebrate communities were sampled and habitat structure measured in relation to habitat niches on the roof, including PV panels. Ninety-two plant species were recorded on the roof and variation in vegetation structure associated with proximity to PV panels was identified. Almost 50% of target invertebrate species collected were designated of conservation importance. Arthropod distribution varied in relation to habitat niches on the roof. The overall aim of the Main Press Centre building green roof design was to create a mosaic of habitats to enhance biodiversity, and the results of the study suggest that PV panels can contribute to niche diversity on a green roof. Further detailed study is required to fully characterise the effects of PV panel density on biodiversity.

APA, Harvard, Vancouver, ISO, and other styles

5

Damianaki, Katerina, Christos A. Christodoulou, Christos-Christodoulos A. Kokalis, Anastasios Kyritsis, Emmanouil D. Ellinas, Vasiliki Vita, and Ioannis F. Gonos. "Lightning Protection of Photovoltaic Systems: Computation of the Developed Potentials." Applied Sciences 11, no. 1 (December 31, 2020): 337. http://dx.doi.org/10.3390/app11010337.

Full text

Abstract:

In this paper, the performance of a lightning protection system (LPS) on a grid-connected photovoltaic (PV) park is studied by simulating different scenarios with the use of an appropriate software tool. The aim of this paper is to highlight the importance of an LPS and optimize its design for the protection of equipment and personnel in case of a direct lightning strike. In particular, developed potential due to lightning strikes is examined considering isolated and non-isolated external LPS. Moreover, the effect of the separation distance on the lightning performance of the PV installation is investigated for different soil structures and grounding systems. The extracted results are expected to support the design and implementation of a secure PV park and endorse its uninterrupted operation considering techno-economically balanced protection measures.

APA, Harvard, Vancouver, ISO, and other styles

6

Yee, Myat Mon, and Chatchai Sirisamphanwong. "Analysis of the Impact of Distributed Grid-Connected PV System on Power Quality of the Electrical Distribution Network." Applied Mechanics and Materials 839 (June 2016): 124–29. http://dx.doi.org/10.4028/www.scientific.net/amm.839.124.

Full text

Abstract:

Electricity generation from solar energy by using PV cells is drastically increased due to global warming concern, greenhouse effect, and quality of living standards. However, PV generation may offer variable and unpredictable energy output due to intermittent nature of solar irradiance and hence, integration of PV into grid may provide some drawback effect to the power system. The aim of this paper is to investigate the impact of grid connected PV system on the power quality of distribution network. The power quality analysis is based on real measurements of 10 kWp, Energy Park SERT, School of Renewable Energy, Naresuan University, Thailand. Parameters such as active and reactive power, voltage, current, power factor, THDv, THDi, individual harmonic voltage and harmonic current are observed for the investigation of the interaction between SERT PV system and distribution network’s power quality. According to the measured data, PV system operation is negligible in terms of voltage distortion, voltage magnitude and frequency variation. Therefore, it can be noticed that 10 kWp SERT PV system does not effect on the distribution system power quality due to low PV penetration level.

APA, Harvard, Vancouver, ISO, and other styles

7

Sekoguchi, Masahiro, Tetsuo Yamada, Yusuke Abe, Yoshihiro Takada, Masahiro Yoshioka, and Riichiro Sakamoto. "Measured Evaluation of PV-DG-Hybrid Power Solutions in Indian Japanese Industrial Park." IEEJ Transactions on Power and Energy 139, no. 7 (July 1, 2019): 470–77. http://dx.doi.org/10.1541/ieejpes.139.470.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Gast, Maren. "Managementlösung für Photovoltaik-Parks jeder Größe." BWK ENERGIE. 71, no. 09 (2019): 11–13. http://dx.doi.org/10.37544/1618-193x-2019-09-11.

Full text

Abstract:

PARKMANAGEMENT | Aufgrund sinkender Systemkosten erhöht sich die Wirtschaftlichkeit der Photovoltaik (PV) stetig. Mittlerweile werden in Deutschland erste große PV-Parks ohne staatliche Förderung geplant. So möchte EnBW den mit 175 MW größten Park in der Nähe von Berlin umsetzen. Der dort erzeugte subventionsfreie Strom soll schon 2020 zur Verfügung stehen. Mit dem Parkmanagementsystem von Phoenix Contact lässt sich der Inbetriebnahme- und Wartungsaufwand solcher Großanlagen um bis zu 50 % reduzieren.

APA, Harvard, Vancouver, ISO, and other styles

9

Al Siyabi, Idris, Arwa Al Mayasi, Aiman Al Shukaili, and Sourav Khanna. "Effect of Soiling on Solar Photovoltaic Performance under Desert Climatic Conditions." Energies 14, no. 3 (January 28, 2021): 659. http://dx.doi.org/10.3390/en14030659.

Full text

Abstract:

The solar irradiation at the gulf Arabia is considered one of the highest in the world. However, this region is classified as a desert with high dust accumulation. Thus, the objective of this study is to analyze the effect of soiling and the photovoltaic (PV) tilt angle on the performance of 2.0 MWp of car park PV plant in Oman. Experimental measurements were taken and a model was developed for simulation. The power generation by the cleaned PV system was measured as 1460 kW around noon. After one week of operation, the power production (at the same irradiance level) reduced to 1390 kW due to soiling. It further reduced to 1196 kW and 904 kW after three and five weeks of operation, respectively. The results also show that a soiling-percentage of 7.5% reduced the monthly electricity generation (307 MWh) by 5.6% and a soiling-percentage of 12.5% reduced the generation by 10.8%. Furthermore, the increase in tilt is not recommended due to the duo-pitch canopy effect of the car park where the panels with 180° azimuth generate lower electricity than the panels with 0° azimuth. In addition, the part of the car park with 180° azimuth caused shading to the other part for high tilt angles.

APA, Harvard, Vancouver, ISO, and other styles

10

Linhart, Matthias, Valerie Rodin, Simon Moser, and Andrea Kollmann. "Citizen Participation to Finance PV Power Plants Focused on Self-Consumption on Company Roofs—Findings from an Austrian Case Study." Energies 14, no. 3 (January 31, 2021): 738. http://dx.doi.org/10.3390/en14030738.

Full text

Abstract:

Despite large amounts of available roof space, long pay-back periods for investments in photovoltaic (PV) power plants often hinder PV installations in industrial parks. Photovoltaic citizen participation initiatives (PV-CPI) are an alternative way of financing PV power plants that add non-financial benefits to these investments. This paper analyzed the feasibility of the installation of PV power plants focused on high rates of self-consumption financed by citizen participation initiatives on the roofs of five companies located in the Austrian Ennshafen industrial business park based on the net present value and the discounted pay-back period and compared it to a standard financing scheme, assuming a predetermined interest rate for participants as well as economies of scale with respect to the specific installation costs due to a joint purchase of the PV power plants. To calculate the feasibility, site-specific data and literature input have been used. The results show that despite an interest rate above the current interest rates of conservative forms of investments provided to (small-scale) investors, a payback-period of 17–23 years can be reached while the joint purchase can lead to a competitive feasibility of the PV-CPI compared to an individual purchase of PV power plants.

APA, Harvard, Vancouver, ISO, and other styles

11

Xydis, George, and Nick Vlachakis. "Feed-in-Premium Renewable Energy Support Scheme: A Scenario Approach." Resources 8, no. 2 (June 5, 2019): 106. http://dx.doi.org/10.3390/resources8020106.

Full text

Abstract:

Topics such as energy demand, energy security and greenhouse emissions have made countries around the world turn to more environmentally friendly resources to produce electricity. Due to their stochastic behaviour (particularly wind energy and solar photovoltaics (PV)), the energy producers that are renewable energy driven need concrete financial mechanisms in order to sell their generated electricity under uncertainty in a highly competitive environment. In this work, the application of the Feed-in Premium (FiP) policy in the Greek wholesale liberalised electricity market is compared against a multiple revenue stream tactic. The investigation of the financial performance is conducted in terms of Net Present Value and Complete Payback Period of a 10 MW wind park and a 2 MW solar PV park and is questioned under a multiple revenue stream approach. It was found for projects that offer at least 75% of their electricity production to the market, if their operation licence is extended for five more years, incentivising them to participate in the FiP scheme, instead of the Feed-in-Tariff one, this will increase their profitability in most cases, for both wind and PV projects.

APA, Harvard, Vancouver, ISO, and other styles

12

Cheikh-Mohamad, Saleh, Manuela Sechilariu, Fabrice Locment, and Youssef Krim. "PV-Powered Electric Vehicle Charging Stations: Preliminary Requirements and Feasibility Conditions." Applied Sciences 11, no. 4 (February 17, 2021): 1770. http://dx.doi.org/10.3390/app11041770.

Full text

Abstract:

Environmental benefits lie in halting direct air pollution and reducing greenhouse gas emissions. In contrast to thermal vehicles, electric vehicles (EV) have zero tailpipe emissions, but their contribution in reducing global air pollution is highly dependent on the energy source they have been charged with. Thus, the energy system depicted in this paper is a photovoltaic (PV)-powered EV charging station based on a DC microgrid and includes stationary storage and public grid connection as power source backups. The goal is to identify the preliminary requirements and feasibility conditions for PV-powered EV charging stations leading to PV benefits growth. Simulation results of different scenarios prove that slow charging with long park time could increase PV benefits for EVs and may reduce the charging price, therefore, EV users should be more willing to stay at charging stations. Whereas, for fast charging, EV users should accept the high charging price since it depends on the public energy grid. Energy system distribution and EV’s energy distribution are well presented.

APA, Harvard, Vancouver, ISO, and other styles

13

Demian, Gabriela, Mihai Demian, Stefan Radu, and Sandu Dubovan. "Multi-Criteria Decision-Making Tools for Selection Photovoltaic Modules." Advanced Engineering Forum 27 (April 2018): 147–51. http://dx.doi.org/10.4028/www.scientific.net/aef.27.147.

Full text

Abstract:

This paper presents aplying a multi-criteria decision methods to evaluate an optimum photovoltaic module for the construction of a solar park. In this work, seven number of alternative of photovoltaic modules and four criteria for selection is used for the optimal solution. The result from the research demonstrate which of the analyzed PV modules is the most convenient to be used for construction of a solar park.

APA, Harvard, Vancouver, ISO, and other styles

14

Klugmann-Radziemska, Ewa, and Małgorzata Rudnicka. "Energy Yield Generated by a Small Building Integrated Photovoltaic Installation." Ecological Chemistry and Engineering S 27, no. 3 (September 1, 2020): 335–46. http://dx.doi.org/10.2478/eces-2020-0021.

Full text

Abstract:

AbstractIn the recent years photovoltaic (PV) industry has experienced a major growth, caused by the ever present annual decrease in module production prices and the expanding awareness of the general public in terms of renewable energy. There are numerous ways to implement PV modules as an additional energy source for a building, be it mounted on the rooftop, or building integrated (BIPV). An analysis of BIPV consisting of 8 modules with the power of 250 Wp each was carried out for the building of the Chemistry Faculty of Gdansk University of Technology (GUT). It included monthly irradiance and energy generation values and compared them to data obtained by the means of PV-GIS system, after inserting site specific coordinates. Additional research on the same type of a single module with the power of 270 Wp was conducted to provide more insight in this matter. A comprehensible analysis allows for defining a final conclusion for the decrease in energy yield for GUT BIPV installation. Data outputs are lower than expected based on PV-GIS values, as for the most time the facade mounted PV system experiences partial soft shading from the nearby park. Furthermore, it is not located directly facing south, but rather south-east which does not prompt ideal working conditions.

APA, Harvard, Vancouver, ISO, and other styles

15

Chen, Hsuan Jui, Che Ming Chiang, Chi Chang Chan, and Chao Yang Huang. "A BIPV Case Study of the Environmental Effects with the PV Energy Performance." Applied Mechanics and Materials 71-78 (July 2011): 3020–24. http://dx.doi.org/10.4028/www.scientific.net/amm.71-78.3020.

Full text

Abstract:

The operation of BIPV case study aimed to the environmental effects of the architectural design on landscape, which estimated the usability between human behavior and renewable energy on the design management. The BIPV project was the landmark of the local city hall, when it was built in Tainan Country in 2005, and it was the first BIPV research model in Taiwan. The multifunction covered three aspects: renewable energy usage, green site planning and underground parking lot. The BIPV working system was a hybrid system, which used 219 pieces PV modules by glass-to-glass type, and had total PV capacity of 24.09kWp. In the PV renewable energy, the DMY data was from 1.42 to 1.82 (kWh/day/kWp) and the PR value was form 36.6%-49.2%. For consideration of each evaluated factors, the architectural esthetics and energy design of the BIPV research case was not perfectly balance in the project. The citizens could accept this modern urban park as a friendly design for usage. But the PV power efficiency, the excessive design and inexact distribution decreased its power performance too much. Ultimately, the research presented an intensely interesting data for Taiwan BIPV development between the PV industry and architectural design.

APA, Harvard, Vancouver, ISO, and other styles

16

Jamali, Abid Ali, Nursyarizal Mohd Nor, Taib Ibrahim, Mohd Fakhizan Romlie, and Zahid Khan. "Impact of Photovoltaic Plant Outputs in Distribution Networks." MATEC Web of Conferences 225 (2018): 04024. http://dx.doi.org/10.1051/matecconf/201822504024.

Full text

Abstract:

This paper evaluates the potential of Quaid-e-Azam Solar Park (QASP), Pakistan and examines its impact on distribution networks. To estimate the PV plant yields, solar park’s historical hourly weather data from the years 2000 - 2014 is used. For handling of such huge data, the yearly data is partitioned into four seasons. Further, the seasonal data is modelled by using Beta Probability Density Function (PDF) and a 24 hour solar curve for each season is generated. The solar farm power outputs are tested in IEEE 33 bus distribution network by using time-varying seasonal hourly loads, meanwhile system losses and bus voltages are calculated. The results show that with the passage of time, the impact of solar PV power on reduction of system losses gradually decrease due to yearly degradation of PV module efficiency. System losses at end of PV farm life are 10 - 12% higher than those losses as in the first year. Furthermore, low voltage buses also pose to risk as system voltages also start to decrease. From the analysis, it is suggested that for maintaining the quality of network, time varying detailed assessments should be performed during the calculations of sizing of distributed generation.

APA, Harvard, Vancouver, ISO, and other styles

17

Krishnan, Ram, Amber Haselhuhn, and Joshua M. Pearce. "Technical Solar Photovoltaic Potential of Scaled Parking Lot Canopies: A Case Study of Walmart U.S.A." Journal on Innovation and Sustainability. RISUS ISSN 2179-3565 8, no. 2 (June 11, 2017): 104. http://dx.doi.org/10.24212/2179-3565.2017v8i2p104-125.

Full text

Abstract:

Solar photovoltaic (PV) technology can provide sustainable power for the growing global population in cities, but it demands considerable land area. This is a challenge for densely populated cities. However, the stranded assets of non-productive parking lots areas can be converted to solar farms with PV canopies, enabling sustainable electricity generation while preserving their function to park automobiles. This study provides a method for determining the technical and economic potential for converting a national scale retail company’s parking lot area to a solar farm. First, the parking lot area for the company is determined and divided into zones based upon solar flux using virtual maps. Then the potential PV yield in each zone is calculated. A sensitivity analysis is performed on the price per unit power installed, solar energy production as a proxy for conversion efficiency, electricity rates and revenue earned per unit area. To demonstrate this method, analysis of Walmart Supercenters, USA is presented as a case study. The results show solar canopies for parking lot areas are a profitable as well a responsible step in most locations and there is significant potential for sustainable energy deployment in cities by other similar retailers using solar PV canopies.

APA, Harvard, Vancouver, ISO, and other styles

18

Anwar, Bilal, Muhammad Imran Ashraf, and Aftab Alam. "OPPORTUNITIES AND RISK FACTORS IN PUBLIC-PRIVATE PARTNERSHIP ON ENERGY: A CRITICAL ANALYSIS OF SOLAR PHOTOVOLTAIC PLANT AT BAHAWALPUR." Global Political Review 3, no. 2 (December 30, 2018): 61–74. http://dx.doi.org/10.31703/gpr.2018(iii-ii).07.

Full text

Abstract:

This study delineates a 1000 Megawatt (MW) very large scale Photovoltaic (PV) system designed in three phases, from which 100 MW has functional and the remaining two phases of 300MW, 600 MW has yet to be functional at Quaid-eAzam solar park (QSP) in Cholistan desert near Bahawalpur City of Pakistan. This study describes the opportunities and risks in the construction of solar PV plant (QSP), which is constructed through public-private partnership (3P).This study uses the case study as a part of research methodology. Firstly it explains about 3Ps, their various types and necessity. Secondly, explores the critical factors in the construction of QSP PV Plant through PESTLE (political, economic, social, technological, legal, environmental) analysis. Thirdly outlines the effect of RE projects on the socioeconomic status of the periphery which is ignored in previous studies. The recommendations will guide the policymakers how they can embed social acceptance in RE projects.

APA, Harvard, Vancouver, ISO, and other styles

19

Espinosa, Nieves, Alexis Laurent, and Frederik C. Krebs. "Ecodesign of organic photovoltaic modules from Danish and Chinese perspectives." Energy & Environmental Science 8, no. 9 (2015): 2537–50. http://dx.doi.org/10.1039/c5ee01763g.

Full text

Abstract:

The ecodesign of an OPV solar park is reported covering the complete life cycle: manufacturing, use and disposal stages. For the first time the life cycle inventory for such a technology is provided for its use in future LCA and EIA studies. Recommendations with the aim to influence PV policy and decision makers are given.

APA, Harvard, Vancouver, ISO, and other styles

20

Zheng, Xue Jing, Meng Jun Yang, Wan Dong Zheng, and Yun Kun Bu. "Energy Consumption Analysis of Animation-Park in Sino-Singapore Tianjin Eco-City." Applied Mechanics and Materials 316-317 (April 2013): 176–80. http://dx.doi.org/10.4028/www.scientific.net/amm.316-317.176.

Full text

Abstract:

Sino-Singapore Tianjin Eco-city is a strategic cooperation project between China and Singapore to improve the living environment and build an eco-culture. Animation-park covers an area of 1 km2, with a total construction area of 7.7x105m2. Wide sources of the renewable energy, such as solar hot water system, ground source heat pump system, solar PV power generation system, and deep geothermal energy system, is strongly recommended to use in eco-city in order to save energy and protect the environment. The usage of renewable energy is seen as a complement to the conventional energy. The energy consumption of the animation park is 42926tce of coal per year, and the renewable energy that used is 4573.6tce of coal per year. The usage of renewable energy leads to the reduction in the emission of CO2 of 18895.9t per year.

APA, Harvard, Vancouver, ISO, and other styles

21

Meyer, Edson L., Oliver O. Apeh, and Ochuko K. Overen. "Electrical and Meteorological Data Acquisition System of a Commercial and Domestic Microgrid for Monitoring PV Parameters." Applied Sciences 10, no. 24 (December 18, 2020): 9092. http://dx.doi.org/10.3390/app10249092.

Full text

Abstract:

This paper centers on the design and installation of a robust photovoltaic (PV)-based microgrid data acquisition system (DAS) that can monitor different PV systems simultaneously. The PV-based microgrid consists of three solar systems: off-grid, hybrid and grid-assisted systems, each with 3.8 kWp located at SolarWatt park, Fort Hare Institute of Technology (FHIT), South Africa. The designed DAS is achieved by assembling and connecting a set of sensors to measure and log electrical and meteorological parameters from each of the three power plants. Meteorological parameters use a CR1000 datalogger while the electrical output parameters use a DT80 data logger. Calibration was done by voltage signal conditioning which helps to reduce errors initiated by analogue signals. The designed DAS mainly assist in assessing the potential of solar energy of the microgrid power plant considering the energy needed in the remote community. Besides, the simultaneous monitoring of the three systems ensures that the outdoor operating conditions are the same while comparing the logged data. A variable day and a week, data were used to verify the reliability of the system. The back of the array temperature was observed to be 42.7 °C when solar irradiance was 1246 W/m2. The ambient temperature and relative humidity were obtained at 21.3 °C and 63.3%, respectively. The PV current in all three systems increases with the solar irradiance and is highest around midday. The results obtained show that the designed DAS is of great interest in PV system developments.

APA, Harvard, Vancouver, ISO, and other styles

22

Azerefegn, Tefera Mekonnen, Ramchandra Bhandari, and A. Venkata Ramayya. "Techno-economic analysis of grid-integrated PV/wind systems for electricity reliability enhancement in Ethiopian industrial park." Sustainable Cities and Society 53 (February 2020): 101915. http://dx.doi.org/10.1016/j.scs.2019.101915.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Fara, Laurentiu, Alexandru Diaconu, Dan Craciunescu, and Silvian Fara. "Forecasting of Energy Production for Photovoltaic Systems Based on ARIMA and ANN Advanced Models." International Journal of Photoenergy 2021 (August 3, 2021): 1–19. http://dx.doi.org/10.1155/2021/6777488.

Full text

Abstract:

Accurate forecasting of solar energy is essential for photovoltaic (PV) plants, to facilitate their participation in the energy market and for efficient resource planning. This article is dedicated to two forecasting models: (1) ARIMA (Autoregressive Integrated Moving Average) statistical approach to time series forecasting, using measured historical data, and (2) ANN (Artificial Neural Network) using machine learning techniques. The main contributions of the authors could be synthetized as follows: (1) analysis and discussion of the experimental and simulated results regarding solar radiation forecast, as well as energy production prediction and forecasting based on ARIMA and ANN models for two case studies: (a) laboratory BIPV system developed at the Polytechnic University of Bucharest and (b) large PV park placed in a specific site of the south of Romania. A variability index of solar radiation was introduced for the model improvement; (2) comparison between the ARIMA and ANN results to highlight the ARIMA model which is more efficient than the ANN one; (3) optimized method defined by the GMDH model (Group Method of Data Handling) proposed to provide a software program for calculation of the PV energy production.

APA, Harvard, Vancouver, ISO, and other styles

24

Supe, Hitesh, Ram Avtar, Deepak Singh, Ankita Gupta, Ali P. Yunus, Jie Dou, Ankit A. Ravankar, et al. "Google Earth Engine for the Detection of Soiling on Photovoltaic Solar Panels in Arid Environments." Remote Sensing 12, no. 9 (May 5, 2020): 1466. http://dx.doi.org/10.3390/rs12091466.

Full text

Abstract:

The soiling of solar panels from dry deposition affects the overall efficiency of power output from solar power plants. This study focuses on the detection and monitoring of sand deposition (wind-blown dust) on photovoltaic (PV) solar panels in arid regions using multitemporal remote sensing data. The study area is located in Bhadla solar park of Rajasthan, India which receives numerous sandstorms every year, carried by westerly and north-westerly winds. This study aims to use Google Earth Engine (GEE) in monitoring the soiling phenomenon on PV panels. Optical imageries archived in the GEE platform were processed for the generation of various sand indices such as the normalized differential sand index (NDSI), the ratio normalized differential soil index (RNDSI), and the dry bare soil index (DBSI). Land surface temperature (LST) derived from Landsat 8 thermal bands were also used to correlate with sand indices and to observe the pattern of sand accumulation in the target region. Additionally, high-resolution PlanetScope images were used to quantitatively validate the sand indices. Our study suggests that the use of freely available satellite data with semiautomated processing on GEE can be a useful alternative to manual methods. The developed method can provide near real-time monitoring of soiling on PV panels cost-effectively. This study concludes that the DBSI method has a comparatively higher potential (89.6% Accuracy, 0.77 Kappa) in the detection of sand deposition on PV panels as compared to other indices. The findings of this study can be useful to solar energy companies in the development of an operational plan for the cleaning of PV panels regularly.

APA, Harvard, Vancouver, ISO, and other styles

25

Gorai, Soumen, Sattianadan D, V. Shanmugasundaram, S. Vidyasagar, G. R. Prudhvi Kumar, and M. Sudhakaran. "Investigation of voltage regulation in grid–connected PV system." Indonesian Journal of Electrical Engineering and Computer Science 19, no. 3 (September 1, 2020): 1131. http://dx.doi.org/10.11591/ijeecs.v19.i3.pp1131-1139.

Full text

Abstract:

In the present scenario the power demand on the load side is increasing day by day, so to balance the power demand and power supply various renewable energy comes to picture as the additional source of electricity generation. The power generated by various renewable resources such as solar, wind, tidal energy and geothermal sources is environmentally clean and have a less emission impact. Out of which PV system draws more attention because it generates energy with a much lower level of carbon dioxide emissions. In the proposed work the objective is to investigate the synchronisation of the grid-connected PV system in terms of voltage and frequency. It includes the P-V characteristics under the circumstances of MPPT technique such as perturb & observe (P&O) method can able to track the local maximum point. The proposed inverter is a voltage source H-Bridge inverter which is controlled using a Clarke and Park transformation to drive a controlled current into the grid to maintain the THD value within the standards. As the grid frequency is fluctuating between SRF-PLL is generally used to fix the output frequency and phase of the grid. It also includes with the design of a three-phase H-bridge inverter as an interface between PV system and grid system. The proposed work is designed and simulated in MATLAB SIMULINK 2017b environment.

APA, Harvard, Vancouver, ISO, and other styles

26

Hannan, M. A., Z. Abd Ghani, and A. Mohamed. "An Enhanced Inverter Controller for PV Applications Using the dSPACE Platform." International Journal of Photoenergy 2010 (2010): 1–10. http://dx.doi.org/10.1155/2010/457562.

Full text

Abstract:

This paper presents the simulation modeling and prototype development of an inverter controller for photovoltaic (PV) applications using the dSPACE DS1104 controller platform. The controller platform can link the simulation model developed in the MATLAB/SIMULINK environment to its prototype hardware. In the dSPACE controller, the voltage regulator controls the inverter by employing a proportional integral (PI) controller and the Park transformation method to generate sinusoidal pulse-width modulation (SPWM) signals. The SPWM signals switch the insulated gate bipolar transistor (IGBT) to stabilize the 50-Hz sinusoidal AC output voltages of the inverter. The simulation was performed with a DC power supply that acts as the PV generator to supply the power to the inverter. The simulation model was then translated into the inverter prototype using the dSPACE platform and tested in the laboratory to prove the efficacy of the proposed controller. The experimental results for the inverter system demonstrated the feasibility of the proposed control strategy by maintaining the THD of the output voltage at 4.6%.

APA, Harvard, Vancouver, ISO, and other styles

27

Pedrero, Juan, Patxi Hernández, and Álvaro Martínez. "Economic Evaluation of PV Installations for Self-Consumption in Industrial Parks." Energies 14, no. 3 (January 30, 2021): 728. http://dx.doi.org/10.3390/en14030728.

Full text

Abstract:

This paper presents an analysis of the economic performance of photovoltaic (PV) self-consumption systems at an industrial park in the Basque Country (north of Spain). The economic feasibility of the installations is largely dependent on self-consumption and compensation due to electricity injected into the grid, as well as the assumed evolution of the electricity prices. A sensitivity analysis is carried out for different installation sizes and different evolution scenarios concerning electricity prices. The potential for installations for shared self-consumption with dynamic and static distribution coefficients is also analyzed. The results show that medium sized installations are generally a cost effective way to reduce energy bills, while the economic performance of larger installations is more uncertain, and is largely dependent on the selling price for electricity injected into the grid. This case study found that the economic benefits of shared self-consumption between different companies are substantial, and are slightly more favorable when applying dynamic distribution factors.

APA, Harvard, Vancouver, ISO, and other styles

28

Bakic, Vukman, Milada Pezo, Marina Jovanovic, Valentina Turanjanin, and Biljana Vucicevic. "Technical analysis of photovoltaic/wind systems with hydrogen storage." Thermal Science 16, no. 3 (2012): 865–75. http://dx.doi.org/10.2298/tsci120306132b.

Full text

Abstract:

The technical analysis of a hybrid wind-photovoltaic energy system with hydrogen gas storage was studied. The market for the distributed power generation based on renewable energy is increasing, particularly for the standalone mini-grid applications. The main design components of PV/Wind hybrid system are the PV panels, the wind turbine and an alkaline electrolyzer with tank. The technical analysis is based on the transient system simulation program TRNSYS 16. The study is realized using the meteorological data for a Typical Metrological Year (TMY) for region of Novi Sad, Belgrade cities and Kopaonik national park in Serbia. The purpose of the study is to design a realistic energy system that maximizes the use of renewable energy and minimizes the use of fossil fuels. The reduction in the CO2 emissions is also analyzed in the paper.

APA, Harvard, Vancouver, ISO, and other styles

29

Pillot, Benjamin, Nadeem Al-Kurdi, Carmen Gervet, and Laurent Linguet. "Optimizing operational costs and PV production at utility scale: An optical fiber network analogy for solar park clustering." Applied Energy 298 (September 2021): 117158. http://dx.doi.org/10.1016/j.apenergy.2021.117158.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Betti, Alessandro, Mauro Tucci, Emanuele Crisostomi, Antonio Piazzi, Sami Barmada, and Dimitri Thomopulos. "Fault Prediction and Early-Detection in Large PV Power Plants Based on Self-Organizing Maps." Sensors 21, no. 5 (March 1, 2021): 1687. http://dx.doi.org/10.3390/s21051687.

Full text

Abstract:

In this paper, a novel and flexible solution for fault prediction based on data collected from Supervisory Control and Data Acquisition (SCADA) system is presented. Generic fault/status prediction is offered by means of a data driven approach based on a self-organizing map (SOM) and the definition of an original Key Performance Indicator (KPI). The model has been assessed on a park of three photovoltaic (PV) plants with installed capacity up to 10 MW, and on more than sixty inverter modules of three different technology brands. The results indicate that the proposed method is effective in predicting incipient generic faults in average up to 7 days in advance with true positives rate up to 95%. The model is easily deployable for on-line monitoring of anomalies on new PV plants and technologies, requiring only the availability of historical SCADA data, fault taxonomy and inverter electrical datasheet.

APA, Harvard, Vancouver, ISO, and other styles

31

Ngoubangoye, Barthelemy, Gael Darren Maganga, Larson Boundenga, Thierry Audrey Tsoumbou, Virginie Rougeron, Illich Manfred Mombo, Nancy Diamella Moukodoum, et al. "Absence of paramyxovirus RNA in non-human primate sanctuaries and a primatology center in Gabon." Journal of Epidemiological Research 5, no. 2 (June 12, 2019): 6. http://dx.doi.org/10.5430/jer.v5n2p6.

Full text

Abstract:

The viruses of the Paramyxoviridae family are known to infect a wide range of animals, including primates, birds, rodents,carnivores, bats, ungulates, snakes, cetaceans and humans. This study aims to investigate the circulation of paramyxoviruses in five potential host species groups (humans, non-human primates, rodents, shrews, and bats) living in the same environments in three conservation programs dedicated to non-human primates, namely the Lékédi park, the primatology center of the International Center for Medical Research of Franceville and the Gorilla Protection Program, located in Gabon. We tested 35 workers, 343 NHPs (8 species), 141 bats (4 species), 420 rodents (5 species) and 10 shrews, sampled between 2013 and 2014. Faecal and organ samples were analyzed using three heminested reverse transcription-PCR (hnRT-PCR). All the 1884 samples tested were negative for PV detection. Further studies spanning a greater period of time are needed to investigate PV circulation patterns in theseconservation programs.

APA, Harvard, Vancouver, ISO, and other styles

32

Stefano, Aneli, Arena Roberta, Antonio Gagliano, and Guido Sciuto. "Opportunity for Revamping/Repowering of a Large Photovoltaic Plant in Sicily, a Case Study." Tecnica Italiana-Italian Journal of Engineering Science 65, no. 2-4 (July 30, 2021): 285–91. http://dx.doi.org/10.18280/ti-ijes.652-422.

Full text

Abstract:

The current Italian photovoltaic park begins to show significant underperformance in efficiency mainly due to degradation of the modules, component defects, incorrect design, construction and maintenance of the systems. Such criticisms have the highest occurrences for the older installations which have had to meet feed-in tariff deadlines. According to GSE data, in Italy at the end of 2013 about 11,000 photovoltaic systems of between 200 kW and 5000 MW were installed, for a total power of about 11.0 GW, the prospective of upgrading and improving these older plants becomes progressively significant to both producers and PV plant owners. To meet these new needs, the Italian Energy Service System Operator (GSE) has recently issued new directives for repowering that allow producers of photovoltaic energy to maintain and modernize their plants without losing incentives. To evaluate the opportunities deriving from the possibility of revamping existing plants, a case study on a PV plant built in Sicily for which significant production losses were found is presented. The total investment costs, estimated in approximately € 444,000, is based on a market survey and the advice of industry experts. Considering the residual incentive period still recognized equal to 13, the economic return on investment is expected 8th year of post-revamping. The possibility of making this type of operation compatible with the maintenance of incentives is, therefore, an opportunity to increase the efficiency and enhancement of the national photovoltaic park and at the same time a potentially advantageous investment for producers.

APA, Harvard, Vancouver, ISO, and other styles

33

Karki, Menaka, Dol Raj Kunwar, Bijay Sharma, Sunil Paudel, and Tanka Nath Ojha. "Power Flow management among PV, BESS and Grid for EV Charging." Technical Journal 1, no. 1 (July 1, 2019): 102–12. http://dx.doi.org/10.3126/tj.v1i1.27708.

Full text

Abstract:

Electric Vehicles (EVs) are the cleanest means of transportation compared to the conventional vehicles. Unlike conventional vehicles, EVs do not depend on petroleum products and thus use of electric vehicle is going to dominate the transportation sector soon. The battery electric vehicles need charging stations for their battery to charge. The proposed topology focuses on power flow management for charging of EV loads. it proposes electric vehicle charging system in which vehicle owners are allowed to park their vehicle in the charging station and EVs are charged up to their desired SOC level. The proposed system promotes penetration of RES to a larger extent which minimizes the kwh cost of grid energy consumption, and hence generating significant economical revenue of the charging station. In this paper, charging station is modeled with PV, battery and grid, and power management strategies are proposed among them. Regulation of load sharing and prevention of mismatch between circulating currents supplied by power sources is implemented using fixed droop method. The trend of power demand by EVs in the charging station is estimated and matching between demand and supply is implemented. Energy storage system is used in order to support continuous power availability in the station. The simulations are successfully implemented to validate the effectiveness of the system and to demonstrate the load management system by the uncoordinated method of charging. The overall system is implemented by algorithm run in MATLAB/Simulink.

APA, Harvard, Vancouver, ISO, and other styles

34

Navabi, A., T. Rupert, S. J. Park, K. Yu, T. H. Smith, and K. P. Pauls. "Apex common bean." Canadian Journal of Plant Science 93, no. 1 (January 2013): 131–35. http://dx.doi.org/10.4141/cjps2012-139.

Full text

Abstract:

Navabi A., Rupert, T., Park, S. J, Yu, K., Smith, T. H. and Pauls, K. P. 2013. Apex common bean. Can. J. Plant Sci. 93: 131–135. Apex (CFIA registration no. 7052) is an indeterminate, full-season navy bean (Phaseolus vulgaris L.) cultivar with an upright plant architecture, suitable for direct harvest, high yield potential, moderate resistance to common bacterial blight (CBB; caused by Xanthomonas axonopodis pv. phaseoli) and superior cooking quality. Apex is adapted to and recommended for the dry bean growing areas with higher than 2700 CHU in southwestern Ontario.

APA, Harvard, Vancouver, ISO, and other styles

35

Bouknadel, Abdelhadi, Naima Ikken, Ahmed Haddou, Nour-Eddine Tariba, Hafsa El Omari, and Hamid El Omari. "A new SOGI-PLL method based on fuzzy logic for grid connected PV inverter." International Journal of Electrical and Computer Engineering (IJECE) 9, no. 4 (August 1, 2019): 2264. http://dx.doi.org/10.11591/ijece.v9i4.pp2264-2273.

Full text

Abstract:

Phase angle detection of the grid voltage is an imperative part of control in most applications, especially for the synchronization of the current injected by the grid-connected photovoltaic inverters. Consequently, fast and accurate detection of the phase angle, frequency and amplitude of the grid voltage are indispensable data to ensure a correct generation of reference signals and operation of the grid connected inverters. We present in this work a new phase-locked loop (PLL) method for single-phase systems. The novelty is to generate an orthogonal voltage system using a second-order generalized integrator (SOGI), followed by a Park transformation, whose quadrature component is forced to zero by the fuzzy logic, in order to obtain rapid detection and a more accurate picture of the phase angle. Furthermore, simulation results with PSIM software will be submitted to verify the performance and effectiveness of the proposed method strategy. Finally, the experimental test will be used to extract the result and discuss the validity of the proposed algorithm.

APA, Harvard, Vancouver, ISO, and other styles

36

ABBAS, Z., K. HARIJAN, P. H. SHAIKH, G. D. WALASAI, and F. ALI. "Effect of Ambient Temperature and Relative Humidity on Solar PV System Performance: A Case Study of Quaid-e-Azam Solar Park, Pakistan." SINDH UNIVERSITY RESEARCH JOURNAL -SCIENCE SERIES 49, no. 004 (December 19, 2017): 721——726. http://dx.doi.org/10.26692/surj/2017.12.47.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Piotrowska–Woroniak, Joanna, Grzegorz Woroniak, and Wiesław Załuska. "Energy production from PV and carbon reduction in great lakes region of Masuria Poland: A case study of water park in Elk." Renewable Energy 83 (November 2015): 1315–25. http://dx.doi.org/10.1016/j.renene.2015.05.034.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Lindberg, O., A. Birging, J. Widén, and D. Lingfors. "PV park site selection for utility-scale solar guides combining GIS and power flow analysis: A case study on a Swedish municipality." Applied Energy 282 (January 2021): 116086. http://dx.doi.org/10.1016/j.apenergy.2020.116086.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Tao, Yibin, Jinhua Xue, Min Xia, Jin Tao, Qichao Zhang, Xiao Li, Qiangqiang Liao, Cheng Li, and Haibo Tang. "Economic Feasibility of Echelon Utilization Battery in Photovoltaic Energy Storage." E3S Web of Conferences 194 (2020): 02001. http://dx.doi.org/10.1051/e3sconf/202019402001.

Full text

Abstract:

Taking the power load of an industrial park in Shanghai as an example in this paper, particle swarm optimization and cost-benefit model are employed to analyse the economy of new lithium-ion batteries, echelon lithium-ion batteries and lead-carbon batteries in photovoltaic energy storage systems in the whole life cycle. The research results showed that the economic order from large to small among different batteries in the photovoltaic energy storage system was new lithium-ion battery, echelon utilization lithium-ion battery and lead-carbon battery. The declines in energy storage cost and discount rate and the rise in peak electricity price can greatly improve the net present value of a photovoltaic-energy storage system (PV-BES) system.

APA, Harvard, Vancouver, ISO, and other styles

40

Sabrin, Samain, Maryam Karimi, and Rouzbeh Nazari. "Developing Vulnerability Index to Quantify Urban Heat Islands Effects Coupled with Air Pollution: A Case Study of Camden, NJ." ISPRS International Journal of Geo-Information 9, no. 6 (May 27, 2020): 349. http://dx.doi.org/10.3390/ijgi9060349.

Full text

Abstract:

Extreme heat events at urban centers in combination with air pollution pose a serious risk to human health. Among these are financially distressed cities and neighborhoods that are facing enormous challenges without the scientific and technical capacity for planning and mitigation. The city of Camden is one of those economically distressed areas with a predominantly minority population, a high unemployment rate, high poverty rates, and poor air quality (PM2.5 and ozone), and it remains vulnerable to heat events. This paper focuses on studying a coupled effect of Urban Heat Islands (UHIs) and Ozone-PM2.5 pollution at the neighborhood-scale in the city of Camden, using fine scale remotely sensed land-surface temperature and air quality data from the Community Multiscale Air Quality (CMAQ) Modelling System in the Geographic Information Systems (GIS) platform. To assess the impact of urban microclimate on the city of Camden, NJ, residents’ health, we identified several environmental and social parameters as the root causes of vulnerability imposed by extreme-heat and poor air quality. Vulnerability in terms of environment and social wellbeing was spatially quantified as two conceptual vulnerability-index models (i.e., environmental vulnerability index (EVI) and a social vulnerability index (SVI)) using multiple linear regression algorithm. Factors such as remotely sensed earth surface properties, built-environment components, air quality, and socio-economic data were incorporated in a holistic geographic approach to quantify the combined effect. Surface temperature gradient and Proportional Vegetation (Pv) generated from 30 m resolution Landsat 8 were sampled along with other variables in the city of Camden, NJ. Models incorporating Pv suggest better fit than models with normalized difference vegetation index (NDVI). Water fraction (33.5%, 32.4%), percentage imperviousness (32.5%, 32%), Pv (20.5%, 19.6%), and digital elevation model (DEM) (9%, 8%) have the highest contributions in both models. Two output maps identified the vulnerable neighborhoods in the city through comprehensive GIS analysis: Lanning Square, Bergen Square, Central Waterfront, Gateway, Liberty Park, and Parkside. This can provide useful information for planners and health officials in targeting areas for future interventions and mitigations.

APA, Harvard, Vancouver, ISO, and other styles

41

Papadopoulos, V., J. Desmet, J. Knockaert, and C. Develder. "Improving the utilization factor of a PEM electrolyzer powered by a 15 MW PV park by combining wind power and battery storage – Feasibility study." International Journal of Hydrogen Energy 43, no. 34 (August 2018): 16468–78. http://dx.doi.org/10.1016/j.ijhydene.2018.07.069.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Hashemi, Y., H. Shayeghi, M. Moradzadeh, and A. Safari. "Design of hybrid damping controller based on multi-target gravitational search optimization algorithm in a multi-machine power system with high penetration of PV park." Journal of Central South University 23, no. 5 (May 2016): 1163–75. http://dx.doi.org/10.1007/s11771-016-0366-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Swamy, D. Manikanta, M. Venkatesan, and M. Subbarao. "Investigations on Three-phase Grid-Connected Inverter using PWM Controllers." Journal of Engineering Science and Technology Review 13, no. 5 (2020): 176–82. http://dx.doi.org/10.25103/jestr.135.23.

Full text

Abstract:

In recent years, a Multilevel Inverter (MLI) topology is highly preferred in the various renewable energy applications for converting power due to their merits. In this paper, a three-phase inverter has been designed for grid-connected applications using Proportional Integral (PI) current controller scheme. To generate a sequence, the Level shift (LS) and Phase Shift (PS) Pulse Width Modulation (PWM) methodologies are adapted. This topology has been designed with two stages: the DC-DC conversion stage and DC-AC conversion stage. The DC-DC conversion stage is used to enrich input DC voltage which is obtained from the solar PV array. The PI current controller has been designed to regulate the grid current with park transformation. The performances of the inverter have been examined in terms of Total Harmonic Distortion (THD) using different PWM techniques and also investigated with existing research works. The developed results are verified using MATLAB/ Simulink.

APA, Harvard, Vancouver, ISO, and other styles

44

Ju, Liwei, Peng Li, Qinliang Tan, Zhongfu Tan, and GejiriFu De. "A CVaR-Robust Risk Aversion Scheduling Model for Virtual Power Plants Connected with Wind-Photovoltaic-Hydropower-Energy Storage Systems, Conventional Gas Turbines and Incentive-Based Demand Responses." Energies 11, no. 11 (October 25, 2018): 2903. http://dx.doi.org/10.3390/en11112903.

Full text

Abstract:

To make full use of distributed energy resources to meet load demand, this study aggregated wind power plants (WPPs), photovoltaic power generation (PV), small hydropower stations (SHSs), energy storage systems (ESSs), conventional gas turbines (CGTs) and incentive-based demand responses (IBDRs) into a virtual power plant (VPP) with price-based demand response (PBDR). Firstly, a basic scheduling model for the VPP was proposed in this study with the objective of the maximum operation revenue. Secondly, a risk aversion model for the VPP was constructed based on the conditional value at risk (CVaR) method and robust optimization theory considering the operating risk from WPP and PV. Thirdly, a solution methodology was constructed and three cases were considered for comparative analyses. Finally, an independent micro-grid on an industrial park in East China was utilized for an example analysis. The results show the following: (1) the proposed risk aversion scheduling model could cope with the uncertainty risk via a reasonable confidence degree β and robust coefficient Γ. When Γ ≤ 0.85 or Γ ≥ 0.95, a small uncertainty brought great risk, indicating that the risk attitude of the decision maker will affect the scheduling scheme of the VPP, and the decision maker belongs to the risk extreme aversion type. When Γ ∈ (0.85, 0.95), the decision-making scheme was in a stable state, the growth of β lead to the increase of CVaR, but the magnitude was not large. When the prediction error e was higher, the value of CVaR increased more when Γ increased by the same magnitude, which indicates that a lower prediction accuracy will amplify the uncertainty risk. (2) when the capacity ratio of (WPP, PV): ESS was higher than 1.5:1 and the peak-to-valley price gap was higher than 3:1, the values of revenue, VaR, and CVaR changed slower, indicating that both ESS and PBDR can improve the operating revenue, but the capacity scale of ESS and the peak-valley price gap need to be set properly, considering both economic benefits and operating risks. Therefore, the proposed risk aversion model could maximize the utilization of clean energy to obtain higher economic benefits while rationally controlling risks and provide reliable decision support for developing optimal operation plans for the VPP.

APA, Harvard, Vancouver, ISO, and other styles

45

Perez, Emma, Madhurababu Kunta, Veronica Ancona, John V. da Graça, Caleb Ayin, Gem Santillana, and Vessela Mavrodieva. "The Return of Asiatic Citrus Canker to Texas: Surveys and Eradication Efforts." Plant Health Progress 22, no. 2 (January 1, 2021): 143–48. http://dx.doi.org/10.1094/php-10-20-0089-s.

Full text

Abstract:

Citrus canker caused by Xanthomonas citri subsp. citri (syn. X. axonopodis pv. citri) was first reported in South Texas during the early 1900s, prompting quarantine and eradication programs by the federal government. Its last reported incidence in Texas was from two trees from Corpus Christi in 1943. In May 2016, USDA Animal and Plant Health Inspection Service-Plant Protection and Quarantine (PPQ) confirmed the presence of the Asiatic A strain, which is by far the most widespread and severe form infecting most citrus varieties, on two sour orange trees in a park in Houston. Subsequently, infected trees were detected in a nursery in Richmond (Fort Bend Co.) in August 2016 and in dooryard trees in Pearland (Brazoria Co.) in 2018. PPQ and Texas Department of Agriculture collected a combined 1,949 positive A strain samples from Harris, Fort Bend, and Brazoria Counties during May 2016 to January 2021. These findings resulted in seven active citrus canker quarantine zones being established in the Upper Gulf Coast area. The Texas Department of Agriculture is removing positive trees, and surveys are continuing.

APA, Harvard, Vancouver, ISO, and other styles

46

Awasthi, Aradhana, Janet Ayello, Carmella van de Ven, Asana Love, and Mitchell S. Cairo. "Polatuzumab Vedotin; Antibody Drug Conjugates (ADC, anti-CD79b-vc-MMAE, PV) Significantly Enhances in-Vitro Cell Death Against CD79b+ Burkitt Lymphoma (BL) /Primary Mediastinal Large B Cell Lymphoma (PMBL) and Improved Overall Survival Against Rituximab Sensitive/Resistant-BL NSG Xenograft Mice." Blood 128, no. 22 (December 2, 2016): 4126. http://dx.doi.org/10.1182/blood.v128.22.4126.4126.

Full text

Abstract:

Abstract Background: Pediatric Burkitt Lymphoma (PBL) represents the most common malignancy in childhood and adolescent non-Hodgkin Lymphoma (NHL) but occurs in less than 5% of adult NHL (Hochberg/Cairo et al, BJH 2009; Miles/Cairo, BJH. 2012). Mature B-NHL, including Burkitt lymphoma (BL) and primary mediastinal large B cell lymphoma (PMBL) express CD79b+ and have an excellent prognosis with chemo-immunotherapy (Cairo et al Blood. 2007,Goldman/Cairo et al. Leukemia, 2013, Gerrard/Cairo et al. Blood. 2013). The prognosis of PBL has significantly improved over 30 years through the use of short and intense multi-agent chemotherapy, however, a subset of patients with relapsed/refractory mature B-NHL has chemoimmunotherapy resistant disease and a dismal prognosis (≤ 20% 5 years, EFS,Cairo et al.Blood. 2007; Cairo et al. JCO.2012, Miles/Cairo et al. BJH. 2012). It is therefore critical to investigate and to develop targeted translational strategies in BL/PMBL in order to reduce acute morbidities, decrease late effects, and provide new options for those with recurrent disease. The anti-CD79b-vc-MMAE antibody drug conjugates (ADC, Polatuzumab Vedotin, PV) has demonstrated significant preclinical activity against indolent CD79b+NHL (Polson et. al.Can. Res. 2009; Dornan et al. Blood. 2009). More recently PV has been safe and well tolerated in adults with CD79b refractory NHL (Palanca-Wessels et al. Lancet Oncol.2015), However, PV preclinical activity against mature BL/PMBL is unknown. Objective: To determine the efficacy of the ADC (anti-CD79b-vc-MMAE) against CD79b+ PMBL in-vitro and rituximab (RTX) sensitive/resistant BL tumor cell lines in-vitro/ in-vivo. Methods: Raji/Raji4RH (provided by M. Barth, Roswell Park Cancer Institute) and PMBL: Karpas1106P and MedB-1 were cultured in RPMI with 10 or 20% FBS. Tumor cells were incubated with hu anti- CD79b-vc-MMAE, and/or anti-CD79b, MMAE or huIgG1 (generously supplied by Genentech Inc.) for 24 hrs. Cell death was evaluated by staining with annexin V/7AAD and cell proliferation was analyzed by alamar blue by flow-cytometry, n=3. Six to 8 week old female NSG (NOD.Cg-Prkdcscid Il2rgtm1Wjl/SzJ), were divided into 5 groups: PBS only (control), isotype control (IgG), PV (5mg/kg), anti-CD79B mAb (5 mg/kg) and MMAE (5 mg/kg). Mice were xenografted with intravenous injections of Luc+ Raji and Raji4RH cells at 5x106 tumor cells/mouse as we have previously demonstrated (Awasthi/Cairo et al, BJH, 2015). Mice were treated twice a week for 6 weeks. Tumor burden was monitored by IVIS spectrum system. Results: Hu- anti -CD79b-vc-MMAE compared to hu anti-CD79b Ab or control hu IgG1 Ab alone (10µg/ml, 24hrs), significantly enhanced cell death ( apoptosis) in Raji, 47.2±1.3% vs 29.1±6.0% vs. 28.2±4.3%, (p=0.0008 and p=0.00006), Raji4RH, 29.8±9.1% vs 25.4±3.9% vs. 18.0±8.2% (p=NS and p=0.03), Karpas1106P, 46.8±5.3% vs 33.8±3.5% vs. 26.2±0.4% (p=0.02 and 0.006) and MedB-1, 47.4±2.2% vs 27.6±2.4% vs. 23.9±1.7% (p=0.002 and 0.0001), respectively. Hu anti- CD79b-vc-MMAE also significantly reduced cell proliferation compared to hu anti- CD79b Ab or control hu anti -IgG1 Ab alone (20µg/ml, 24hrs). Raji, 56.1±5.1% vs 38.1±0.7% vs. 14.8±0.4% (p=0.001 and p=0.0008), Raji4RH, 53.4±5.4% vs 23.4±5.51% vs. 11.3±0.8% (p=0.004 and 0.006), Karpas1106P, 46.4±0.3 %vs 29.0±1.5% vs. 15.9±0.6% (p=0.005 and 0.00007) and MedB-1, 47.2±7.5% vs 27.7±8.5% vs. 12.3±0.5% (p=0.01 and p=0.0005), respectively. Further, median survival time in mice receiving 5 mg/kg of PV was significantly increased when compared to mice receiving 5 mg/kg of anti-CD79b antibody or IgG isotype control in Raji and Raji4RH ( 35.5 vs.17 vs. 19.5 days, p=0.0001, 0.0003 and 50 vs. 18 vs. 18.5 days, p=0.0001, 0.0001, respectively, Figure. A and B) Conclusion: Our preliminary data indicates thathu anti- CD79b-vc-MMAE significantly enhances cell death and reduced cell proliferation in RTX sensitive/ and resistant CD79b+ BL and PMBL compared to CD79b Ab or isotype control IgG1 Ab alone. Furthermore, PV significantly increased survival in BL (RTX sensitive/ resistant) NSG xenografts compared to an equal dose of anti-CD79b alone. Figure. Figure. Disclosures Cairo: Celgene: Research Funding.

APA, Harvard, Vancouver, ISO, and other styles

47

Silva, Miguel, Rui Castro, and Mário Batalha. "Technical and Economic Optimal Solutions for Utility-Scale Solar Photovoltaic Parks." Electronics 9, no. 3 (February 28, 2020): 400. http://dx.doi.org/10.3390/electronics9030400.

Full text

Abstract:

Solar energy has shown to be a successful renewable source, wherefore large investments are planned in the upcoming decades. This work aims at developing technical and economical solutions to optimize a utility-scale grid connected solar photovoltaic park with an installed capacity of 24 MWp. Several successive simulations were automatically performed with the PVSyst software, so that each influencing parameter is individually analyzed. Moreover, a comprehensive study touching relevant aspects, such as central versus string inverters, landscape versus portrait dispositions, the optimal tilt angle (for fixed tilt systems), backtracking strategy (for single axis tracking systems), shading limit angle, and pitch is performed with the objective of finding the configuration leading to the higher grid injected energy output. The levelized cost of energy (LCOE) was obtained for 12 different cases in which, for both fixed tilt and single-axis tracking (SAT), central and string inverters and portrait/landscape disposition were considered. The lowest LCOE achieved was 32.23 €/MWh, which is a clear indication of the competitiveness of the solar Photovoltaic (PV) technology. The most economic viable solution is characterized by the employment of an SAT system with the backtracking strategy, together with string inverters and module portrait disposition.

APA, Harvard, Vancouver, ISO, and other styles

48

García de Jalón Sanz, Jesús. "Eficiencia de las fichas de Procesos para el conocimiento de los mayorazgos." Príncipe de Viana LXXX, no. 274 (January 30, 2020): 951–76. http://dx.doi.org/10.35462/pv.274.11.

Full text

Abstract:

We have reviewed the descriptive sheets of the computerized database of the Process Section of the General Archive of Navarra to try to know the number of mayorazgos located in the city of Viana, Navarra. The «Viana and mayorazgo» strategy was used for the search. 211 datasheets were found in response to the search. An analysis of the contents of the files is made, with the result of 29 mayorazgos with main house, movable property and roots property in Viana, and on the reasons that originated the corresponding process. We discuss the findings and conclude the effectiveness and efficiency of the descriptive sheets for the knowledge of the number, name and history of mayorazgos with regard to Navarra and the General Archive of Navarra. Keywords: General Archive of Navarra; Processes; mayorazgo; Viana. RESUMEN Se han revisado las fichas descriptivas de la base de datos informatizada de la Sección de Procesos del Archivo General de Navarra para intentar conocer cuántos fueron los mayorazgos ubicados en la ciudad de Viana, Navarra. Se utilizó para la búsqueda la estrategia «Viana and mayorazgo». Se encontraron 211 fichas como respuesta a la búsqueda. Se hace un análisis del contenido de las fichas, con el resultado de 29 mayorazgos con casa principal y bienes muebles y raíces en Viana, y sobre los motivos que originaron el correspondiente proceso. Se discute sobre los hallazgos y se concluye la eficacia y eficiencia de las fichas descriptivas para el conocimiento del número, nombre e historia de los mayorazgos en lo que respecta a Navarra y al Archivo General de Navarra. Palabras clave: Archivo General de Navarra; Procesos; mayorazgo; Viana.

APA, Harvard, Vancouver, ISO, and other styles

49

Araújo, R. A., R. C. Rodrigues, C. S. Costa, F. N. S. Santos, C. O. Costa, and I. R. Silva. "Capacidade de suporte mínima para desenvolvimento da microbiota ruminal." Archivos de Zootecnia 68, no. 263 (July 15, 2019): 342–47. http://dx.doi.org/10.21071/az.v68i263.4191.

Full text

Abstract:

Foi avaliada a degradabilidade in situ da matéria seca (DMS) de duas cultivares de Urochloa brizantha cvs. Xaraés e Piatã em seus respectivos componentes: folhas e haste, no mesmo período de incubação de 6 horas e a diferentes níveis de suplementação com concentrado com base na porcentagem de peso vivo (PV) animal. O delineamento experimental utilizado foi o inteiramente casualizado com quatro repetições em arranjo fatorial 4x2 (quatro níveis de concentrado na dieta animal 0,0%, 0,33%, 0,67% e 1,0% PV por duas cultivares de Urochloa brizantha). Foi observado que o DMS das folhas de capim Piatã não diferiu quando o animal consumiu o concentrado em níveis 0,0%, 0,33% e 0,67%, para as hastes, o nível de 0,00% PV apresentou menor DMS. As folhas do capim Xaraés apresentaram menor DMS no consumo de concentrado em 1,0% PV e no colmo os maiores valores foram nos níveis 0,00 %, 0,33 % e 0,67% PV. Realizada a equação de regressão foram obtidos maiores valores de concentrado aliados a maior DMS das forrageiras. Para a haste do capim Xaraés o nível ideal de suplementação foi 0,38% do PV de concentrado. Já para as folhas este valor foi 0,41% PV. Para o capim Piatã, os valores de folha e colmo foram de 0,62% e 0,44% PV, respectivamente.

APA, Harvard, Vancouver, ISO, and other styles

50

Contreras Contreras, Jaime. "“Un danés peligroso” en los fondos del Archivo Histórico Nacional." Príncipe de Viana, no. 278 (August 25, 2021): 849–68. http://dx.doi.org/10.35462/pv.278.8.

Full text

Abstract:

El autor aborda la evolución intelectual de Gustav Henningsen y cómo acabó por centrarse en uno de los grandes proyectos de investigación documental: las relaciones de causas de fe. Analiza el interés de esta documentación para un estudio cuantitativo del número de procesados por la Inquisición y sus diversas posibilidades para los estudios históricos.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'PV park'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles