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Автор: Grafiati
Опубліковано: 11 вересня 2023

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Статті в журналах з теми "BUS POWER SYSTEM"

1

Liu, Yongwei, Yu Cheng, Kehai Bao, Houchun Li, and Zhihao Wan. "Design of Power Supply System for High Power SAR Satellite." Journal of Physics: Conference Series 2361, no. 1 (October 1, 2022): 012016. http://dx.doi.org/10.1088/1742-6596/2361/1/012016.

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Анотація:
Synthetic Aperture Radar (SAR) satellite power system has the characteristics of high power, pulse power supply and fast response speed. Based on the combination of domestic and foreign SAR satellite power supply structures, a SAR satellite power supply system scheme with a composite bus architecture is proposed in this paper. By adding battery discharge regulators (BDR) between the platform bus and the SAR load bus as a grid-connected controller, the SAR load bus can supply power to the platform load, and the solar array and battery pack can be used efficiently while achieving dual bus output. Aiming at the composite bus, this paper also proposes an efficient high-power filter technology. Finally, the ground test results verify the correctness of the scheme, which can meet the different power supply requirements of the SAR satellite stable and pulse load equipment.
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2

Suganya, R., M. Anitha, and P. Pugazhendiran. "Enhancement of Power Quality in Four Bus System Using Hybrid Power Flow Controller." IOP Conference Series: Earth and Environmental Science 1100, no. 1 (December 1, 2022): 012028. http://dx.doi.org/10.1088/1755-1315/1100/1/012028.

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Abstract To mitigate the impacts of voltage sag, a hybrid power flow controller (HPFC) finds a spot between the sending and receiving terminals. This research work deals with the comparison of four bus systems employing UPFC and HPFC. Simulation is done for 4 bus system using UPFC and HPFC. The outcomes are associated with respect to the voltage, active power and Reactive power. The outcomes exemplifies the grander enactment of HPFC controlled 4 bus system compared to UPFC controlled 4 bus system.
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3

Djibo, Marounfa `., Paul Moses, and Ike Flory. "Fault Protection Considerations for MVDC Shipboard Power Systems Operating with Pulsed-Power Loads." WSEAS TRANSACTIONS ON POWER SYSTEMS 16 (August 2, 2021): 139–48. http://dx.doi.org/10.37394/232016.2021.16.14.

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Анотація:
Medium Voltage Direct Current (MVDC) power distribution architectures are of immense interest for various shipboard power applications due to their advantages over classical MVAC distribution systems with respect to power quality, power density, and efficiency. However, MVDC are far away from maturity when compared to MVAC with respect to fault detection and isolation. Currently, there are no standards available for applying MVDC protection systems in shipboard applications. Furthermore, due to the absence of zero crossings in DC waveforms and unique transient fault signatures, it is challenging to design effective protection system schemes to isolate faults via conventional protection systems. This paper investigates and analyses various types of shipboard MVDC dynamic fault behaviours and signatures under different DC bus disturbances such as: bus to ground, bus to bus to ground, and impact of Pulsed-Power Load (PPL) with and without faults on a shipboard MVDC distribution system. Furthermore, a communication-based fault detection and isolation system controller that improves upon a directional ac overcurrent relay protection system is proposed offering additional protection discrimination between faults and PPLs in MVDC systems. To validate the effectiveness of the proposed protection controller, different bus current disturbances are simulated within a time-domain electromagnetic transient simulation of a shipboard power system including a PPL system operating with different ramp rate profiles, pulse widths, peak powers, and fault locations
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4

Airoboman, Abel, and T. M. Tyo. "Power Loss Determination, Assessment and Enhancement of the Nigerian Power System Network." Journal of Advances in Science and Engineering 1, no. 2 (September 15, 2018): 17–24. http://dx.doi.org/10.37121/jase.v1i2.22.

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Анотація:
For sustainability to be recorded in the Nigeria power sector (NPS), there must be a well-integrated system that is not easily prone to failure and is readily available when called into action. The NPS has overtime suffered from degraded infrastructure, policy paralysis to mention but few. However, if the needful is done with respect to identifying weak links in the network and a corresponding fast action in clearing failures along the line(s) then, some remarkable achievements could be recorded. This paper, therefore, carried out power flow analysis using the Newton Raphson Algorithm on the Electrical Transient Analyser Program (ETAP) version 12.6 on the NPS network using Maryland transmission station (MTS), Lagos, Nigeria as a case study. The choice of the location was as a result of the sensitivity of Lagos State in the economic activities of Nigeria. Results from the load flow indicated several voltage violations at load1 bus, load3 bus and load5 bus with magnitudes of 94.51, 94.91 and 94.79 % respectively. Consequently, transformers designated as T2A and T3A were said to have the highest and lowest branch losses of 150.0kW and 18.2kW respectively. Compensation of the losses along the line was carried out using optimal capacitor placement (OCP) subjected to constraints on the ETAP environment. The results from the OCP showed that it optimally sized and placed four capacitor banks on four of the candidate buses, which include load1 bus, load2 bus, load3 bus and load5 bus. An improvement of 2.26%, 1.12%, 1.93%, 1.12% and 2.006% were recorded for load1 bus, load2 bus, load3 bus, load4 bus and load5 bus respectively.
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5

Sundaravazhuthi*, V., Dr A. Alli Rani, and M. Manoj Kumar. "Raise Voltage Stability Limit of a Power System using Reactive Power Compensation Technique." International Journal of Innovative Technology and Exploring Engineering 8, no. 12 (October 30, 2019): 2931–34. http://dx.doi.org/10.35940/ijitee.k1752.1081219.

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Анотація:
In recent years, voltage stability problems have been increasing since power systems operate close to stability limits. The voltage stability problem of a power system is associated with a rapid voltage drop due to heavy system load and it occurs because of inadequate reactive power support at some critical bus. One of the serious consequences of the voltage stability is a system blackout, and this has received more attention in recent years. Accurate determination of stability limit and amount of reactive power injection to stabilize is important.This paper proposes to determine voltage stability margin of a critical bus and also provide amount of reactive power injection to the bus particularly during overload, a simple two bus equivalent model of the power system is used to determine the maximum apparent power for different power factors. Any required apparent power can directly obtained by correcting the reactive power at critical bus. Experimental results support our theoretical findings.
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6

Hoang Bao Huy, Truong, and Vo Ngoc Dieu. "A search group algorithm for optimal power flow in power systems." Science and Technology Development Journal 20, K9 (April 15, 2019): 15–22. http://dx.doi.org/10.32508/stdj.v20ik9.1672.

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Анотація:
Economic operation of the electric energy generating system is one of the common problems in power system. This paper presents a new metaheuristic optimization method, the Search Group Algorithm (SGA) for solving optimal power flow (OPF) problem. The proposed method is tested for 11 different cases on the IEEE 30-bus and IEEE-118 bus systems, in which the IEEE 30-bus system is tested with different objective functions including quadratic function, valve point effects and multiple fuels. The obtained results are compared with some well-known optimization algorithms to emphasize the effectiveness of the SGA method for solving different OPF problems with complicated functions.
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7

Sheng Li, Yuting Lu, Can Zhang, and Yuting Zhu. "Physical test study on power system voltage collapse." Global Journal of Engineering and Technology Advances 13, no. 3 (December 30, 2022): 001–7. http://dx.doi.org/10.30574/gjeta.2022.13.3.0197.

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Анотація:
In order to test and verify the phenomena of power system voltage collapse, this article chooses a single-load infinite-bus system and a single-machine single-load system as the sample systems based on the PS-5G test system to carry out the voltage stability physical tests, and an induction motor and an adjustable resistor are used to constitute the comprehensive load. The test results show that in the single-load infinite-bus system, with the decrease of the adjustable resistance gradually, the comprehensive load active power is gradually increasing and the load bus voltage is gradually decreasing; and the slight adjustment for the adjustable resistance can cause the load bus voltage collapse when the induction motor has the locked-rotor. In the single-machine single-load system, the locked-rotor of the induction motor can lead to the occurrence of the reactive power limit-induced bifurcation, it causes the terminal voltage of the synchronous generator and the load bus voltage to have an instantaneous collapse. The test results are conducive to comprehend the mechanisms of voltage instability and collapse in power systems.
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8

GÜMÜŞ, Talha Enes, Selçuk EMİROĞLU, and Türker Fedai ÇAVUŞ. "REDUCING ACTIVE POWER LOSSES WITH OPTIMAL REACTIVE POWER DISPATCH IN 114 BUS NORTHWESTERN ANATOLIAN POWER SYSTEM." INTERNATIONAL REFEREED JOURNAL OF ENGINEERING AND SCIENCES, no. 18 (2022): 0. http://dx.doi.org/10.17366/uhmfd.2022.18.5.

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Анотація:
Aim: In this study, it has been proposed to solve the Optimal Reactive Power Dispatch (ORPD) problem with Genetic Algorithm (GA) in order to minimize the active power losses and voltage fluctuations in the 114 bus Northwestern Anatolian (NWA) power system. Method: The ORPD problem, which is modeled as a nonlinear optimization problem, has been solved by using GA. The ORPD problem has been applied to a large 114 bus power system in Northwestern Anatolia. By solving the ORPD problem, terminal voltages of generators and reactive power values of shunt compensators, which are optimal control variables, have been found. Control variables values to minimize active power losses and voltage fluctuations have been obtained by using GA. Results: The proposed approach has successfully solved the ORPD problem by finding the voltage values of the generators and the sizes of the reactive power sources which are the control variables of the optimization problem. The aim of the ORPD problem is to minimize power losses and to reduce the voltage deviations in the system considering some operational constraints. The proposed approach has been applied to the 114 bus NWA power system and it has been observed that the active power losses are reduced by 4.63% and the bus voltage deviations are decreased from 0.08 to 0.0798 after ORPD. Conclusion: By solving the ORPD problem, active power losses and voltage fluctuations at buses are simultaneously minimized by ensuring that all bus voltages remain within the defined limits in the 114-bus NWA power system. Simulation studies have shown that with the proposed ORPD approach, the bus voltages remain within the specified limits and the active power losses are reduced compared to the first case. The reduction in bus voltage deviations means that the system becomes more stable in terms of stability. Thus, while saving is achieved by increasing the efficiency in the power system, it is also possible to monitor the stability of the system.
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9

CHATURVEDI, Sudhir Kumar CHATURVEDI. "An analytical review for the power system of a spacecraft." INCAS BULLETIN 14, no. 2 (June 10, 2022): 11–26. http://dx.doi.org/10.13111/2066-8201.2022.14.2.2.

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Анотація:
Electrical bus is needed for the operation of all active spacecraft systems and subsystems. In the spacecraft mechanism, the battery charging system and the bus storage continued with bus control, the conditioning and bus distribution is an essential part for keeping the spacecraft in working mode. In this paper, the discussion for electrical power system (EPS) analysis in the spacecraft body will be elaborated from the previous research papers on this subject covering the topics of solar array, solar array drive, over current and over voltage protection, battery charging and discharging, bus control, conversion.
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10

Zhu, Qi Shen. "The Application of Remote Monitoring System Based on FPGA in Power System." Advanced Materials Research 433-440 (January 2012): 4038–41. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.4038.

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Анотація:
Modbus bus has been widely used in the power system. For the seamless integrated realization of enterprise control and management information, the remote interaction of Modbus bus meter data is needed. This design is based on the problems involved in the process of practical power system application. Using FPGA EP2C35F672 hardware platform, UART, DM9000A external chips are extended to complete remote operation and monitoring of Modbus equipment. The field bus and the Internet network interconnection can be realized, so the decentralization and open for control system are improved. The design can be used to rebuild the existing power field bus network. This design has good prospects and practical value.
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Дисертації з теми "BUS POWER SYSTEM"

1

Weldy, Christopher. "Stability of a 24-bus power system with converter interfaced generation." Thesis, Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53597.

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Анотація:
The objective of this Masters Thesis is to investigate the system stability implications of integration of power electronic converter interfaced generation (CIG) into conventional power systems. Due to differences between conventional generation and (CIG), the power system fault currents, voltage response, and frequency response will likely change with increased penetration of (CIG). This research has employed state of the art software tools to perform simulations on the IEEE 24-Bus Reliability Test System (RTS-24), appropriately modified to include converter interfaced generation. Time-domain dynamic simulations and fault calculations have been performed for the system. A comprehensive set of simulations has been performed on the base case, comprised entirely of conventional generation. Conventional generation was replaced by (CIG) in the model, one generating station at a time until (CIG) penetration reached one-hundred percent. The comprehensive set of simulations has been performed at each level of (CIG) penetration. The results have been compared to the base case, with a focus on voltage response, frequency response, and fault current levels of the power system.
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2

Dicharry, Jeff. "Power System Fault Detection Using Conductor Dynamics." ScholarWorks@UNO, 2005. http://scholarworks.uno.edu/td/289.

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Анотація:
Power system fault detection is conventionally achieved using current and potential measurements. An alternate and unconventional form of protective relaying is feasible using rigid bus conductor motion as the means of detection. The research presented focuses on the detection of power system faults using visual displacement of conductor spans. Substation rigid bus conductor motion is modeled using dual spring-mass systems for accurate representation of conductor response to electromagnetic forces generated during system faults. Bundled rigid conductors have advantages including detection independent of system load currents and improved ability to detect polyphase and single phase faults. The dynamic motion of the conductors during the fault is optically monitored with a laser detection system. Timeovercurrent characteristics are derived for the application of fault detection. The response time of the conductor detector system is slower than conventional relays due to the natural frequencies of the conductor span limiting the speed of its displacement. This response time makes the fault detection system using conductor displacement an ideal candidate for a backup relay in power system protection schemes.
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3

Baštán, Ondřej. "Komunikační systém standardu Wireless M-Bus." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-316266.

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Анотація:
The thesis deals with the design of wireless communication system using Wireless M- Bus, which works in the 169 MHz band. This system is designed to collect data from meters that are not equipped with a radio and have pulse outputs. The thesis describes the Wireless M-Bus standard and the current components of the communication system used by ModemTec. It also describes the selection and design of a suitable hardware implementing the receiver and transmitter modules and the firmware design for these modules. The thesis deals with the parameterization of the transmitter module in order to specify the parameters of the transmitted measured quantity.
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4

Fallier, William F. (William Frederick). "Analysis of system wide distortion in an integrated power system utilizing a high voltage DC bus and silicon carbide power devices." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/39730.

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Анотація:
Thesis (Nav. E.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2007.
Includes bibliographical references (p. 81-82).
This research investigates the distortion on the electrical distribution system for a high voltage DC Integrated Power System (IPS). The analysis was concentrated on the power supplied to a propulsion motor driven by an inverter with simulated silicon carbide switches. Theoretically, silicon carbide switches have the advantage of being able to withstand a very large blocking voltage and carry very large forward currents. Silicon carbide switches are also very efficient due to their quick rise and fall times. Since silicon carbide switches can withstand high voltage differentials and switch faster than silicon switches, the switching effects on the electrical distribution system were investigated. The current state of silicon carbide power electronics was also investigated. This research quantifies the current and voltage distortion over various operating conditions. A system model was developed using Matlab, Simulink, and SimPowerSystems. The model consisted of a synchronous generator supplying a rectifier and inverter set driving an induction motor. This induction motor simulates the propulsion motor for a Navy ship. This model had a DC link voltage of 10 kV in order to simulate future Navy IPS systems. The current and voltage distortion were compared to MIL STD 1399 and IEEE STD 519 and 45.
by William F. Fallier.
S.M.
Nav.E.
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5

Fallier, William F. "Analysis of system wide distortion in an integrated power system utilizing a high voltage DC bus and silicon carbide power devices." Thesis, Monterey, California. Naval Postgraduate School, 2007. http://hdl.handle.net/10945/3006.

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Анотація:
This research investigates the distortion on the electrical distribution system for a high voltage DC Integrated Power System (IPS). The analysis was concentrated on the power supplied to a propulsion motor driven by an inverter with simulated silicon carbide switches. Theoretically, silicon carbide switches have the advantage of being able to withstand a very large blocking voltage and carry very large forward currents. Silicon carbide switches are also very efficient due to their quick rise and fall times. Since silicon carbide switches can withstand high voltage differentials and switch faster than silicon switches, the switching effects on the electrical distribution system were investigated. The current state of silicon carbide power electronics was also investigated. This research quantifies the current and voltage distortion over various operating conditions. A system model was developed using Matlab, Simulink, and SimPowerSystems. The model consisted of a synchronous generator supplying a rectifier and inverter set driving an induction motor. This induction motor simulates the propulsion motor for a Navy ship. This model had a DC link voltage of 10 kV in order to simulate future Navy IPS systems. The current and voltage distortion were compared to MIL STD 1399 and IEEE STD 519 and 45.
Contract Number: N62271-97-G-0026
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6

Baral, Bishwas. "Directional Comparison Bus Protection Using Superimposed Partial Operating Current Characteristics." ScholarWorks@UNO, 2019. https://scholarworks.uno.edu/td/2584.

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Анотація:
Various directional comparison bus protection methods including widely used superimposed directional element method need to have both voltages and currents from all feeders connected to the zone of protection to find the direction of current for detecting a bus fault or a line fault. The purpose of the thesis is to present a new technique for directional comparison bus protection to discriminate a bus fault from line fault and normal condition. The new technique, which is implementing superimposed directional element method to modify partial operating current characteristics (POC) method to superimposed POC (SPOC) method, does not use voltages from feeders, hence capacitor voltage transformers (CVTs) are no longer needed in the zone of protection. The proposed technique was implemented in 4-bus and IEEE 14-bus test system and was tested using different fault cases including CT saturation and high impedance fault. The proposed technique, SPOC method was compared with POC method with both methods implemented in same test systems and tested with same fault cases. The results show that the proposed technique is successful to detect bus faults with high accuracy and high speed.
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7

Tong, Shiqiong Miu Karen Nan. "Slack bus modeling for distributed generation and its impacts on distribution system analysis, operation and planning /." Philadelphia, Pa. : Drexel University, 2006. http://hdl.handle.net/1860/1229.

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8

Sun, Xin. "Protection performance study for secondary systems with IEC61850 process bus architecture." Thesis, University of Bath, 2012. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.563989.

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Анотація:
Following the introduction of the microprocessor into the power system protection field, modern microprocessor based numeric relays have developed very rapidly in the last 20 years, and modern power system protection schemes are virtually all based on microcomputers technology. The International Electro-technical Commission (IEC) recently launched the standard IEC61850, “Communication Networks and System in Substation”, which is having a major impact on the structure of new protection systems and schemes. In itself it describes the concepts for sub-station communications covering protection, control and metering functions. However, although it is going to have a major impact on the power systems communications, it will also influence the design of future protection systems. There will also be a host of other opportunities and advantages that can be realised. These include easier upgrading, refurbishment and replacement of sub-station protection. They also provide for greater use of general purpose Intelligent Electronics Devices (IEDs), self-healing systems, and plug and play type facilities. The Ethernet based communication network for data transfer between process level switchyard equipment and bay level IEDs, the process bus, is defined in IEC61850 Section 9-2. This process bus facilitates the communication of two types of real-time, peer-to-peer communication messages. Generic object-oriented substation event messages, the GOOSE messages and the data sample values, SVs which include the measured currents and voltages. Although this standard describes the message structures and the timing requirements, it does not describe the process bus topology. This work describes different LAN topologies that can be used in the design of process bus for protection systems. It considers the implications of the different structures on the operation of the protection scheme and how these relate to the operational strategy of different operators. It provides an assessment of the data handling capabilities of the system and how the demands of the protection system can be met. Several potential problem areas are identified and analyzed. The probabilistic nature of these systems is discussed and the implications explained. It also provides an insight into the implementation of the alternative topologies and their performance when applied to a transmission line feeder protection and transformer protection. The digital substation and the implementation of IEC61850 are fundamental to the future of protection ‘relays’. There are many pointers to the potential directions that these systems will develop and the skills required for the protection engineers of the future. This project is seeking to overcome some of the ownership challenges presented by modern protection and control (P&C) devices, which have an inherent short life due to their dependence on modern electronics and software.
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9

Xing, Kun. "Modeling, Analysis, and Design of Distributed Power Electronics System Based on Building Block Concept." Diss., Virginia Tech, 1999. http://hdl.handle.net/10919/28123.

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Анотація:
The basic Power Electronics Building Block (PEBB) configurations are identified and conceptual PEBB modules are constructed and tested. Using the INCA (Inductance Calculator) parasitic extraction and the Saber circuit simulation software, the microscopic relationships between the parasitics of the packaging layout and their circuit electrical effects are cross-examined. The PEBB module with advanced packaging techniques is characterized in comparison with the wire-bond module. The soft-switching techniques are evaluated for PEBB applications. The Zero-Current-Transition (ZCT) is proved better because the parasitics in the power current flow path are absorbed into the resonant soft-switching operation. This makes the PEBBs insensitive to system integration. Based on the building block concept, the discrete and large signal average models are developed for simulation, design, and analysis of large-scale PEBB-based systems. New average models are developed for half-bridge PEBB module and Space Vector Modulation (SVM). These models keep the exact information of the discontinuous SVM and the common mode component of the three-phase system. They can be used to construct the computer models of a power electronics system the same as the modularized hardware and perform time domain simulations with very fast speed. Further more, even though the system is modeled based on modularized concept on the ABC coordinates, it can be used to perform small signal analysis on the DQ coordinates as well. Based on the developed models, the system-level interactions in integrated systems are investigated. Three interaction scenarios are presented: (1) the zero-sequence circulation current in paralleled three-phase rectifiers caused by the interleaved discontinuous SVM, (2) the load and source interactions caused by unbalanced load and small signal impedance overlap, and (3) the combined common mode noise caused by both front-end PWM rectifiers and load inverters. The interaction phenomena and mitigation methods are demonstrated through hardware testbed system. The concept of dc bus conditioning is proposed. The bus conditioner is a bi-directional dc/dc converter programmed as a current controlled current source, which shunts the large signal ac current, which otherwise goes to the dc bus, into an isolated energy storage component. In addition to alleviate the source and load interactions, it increases the load impedance/decreases the bus impedance and provides more stability margins to the distribution system. The dc bus conditioner concept and its functions are demonstrated through system simulation and preliminary hardware experiment.
Ph. D.
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10

Hsu, Edward Hsuan-Wei. "ELECTRIFICATION OF THE SWEDISH VEHICLE FLEET: CHARGING DEMAND AND THE POWER SYSTEM." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-448286.

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Анотація:
With the transport sector switching to electric energy to reduce greenhouse gas emission, the supply and demand in the energy system are impacted by this transition. Meanwhile, there are not a lot of studies focus on the electrification of the vehicle fleet in Sweden. To fill up the knowledge gap, the paper aims to identify the total required electrical energy and power for the electrification of the vehicle fleet in Sweden. This includes switching passenger vehicles, light and heavy trucks, and buses to battery electric vehicles. An Electric Vehicle Power Demand Model is designed to answer the research question. It is a simplified model that can calculate energy consumption and power demand from an electric vehicle fleet. To simulate the charging schedule, four scenarios are created with differences in charge speed and the use of smart or unregulated charging. Based on the model, the electric vehicle fleet consumes 20.4 TWh of electricity per year, accounting for 14.7% of total demand in Sweden. Combing the vehicle fleet with other energy services, an average hourly peak load of 16.2 GW in summer and 24.3 in winter can be seen, while the available capacity in Sweden is around 27.1. The result indicates that the current Swedish energy system is capable of handling demand from charging the electric vehicle fleet in terms of power capacity for most times. However, undersupply may happen in some extreme condition during the winter due to higher consumption from other energy services. Furthermore, with the increasing share of renewable power in the system, the availability of these power plants can have a direct impact on the supply. This requires smart charging to shift the charging events to prevent peak hours, which can potentially decrease the peak loads up to 2 GW in EV charging demand during peak hours. However, the actual effect of it still requires more study. Lastly, the model created for the research can be used as a research or decision-making tool to estimate the impact of a group of electric vehicles in the future, therefore, contribute to the development of the sustainable energy transition.
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Книги з теми "BUS POWER SYSTEM"

1

Kipps, Mark Rew. A modular approach to modeling an isolated power system on a finite voltage bus using a differential algebraic equation solving routine. Monterey, Calif: Naval Postgraduate School, 1994.

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2

IEEE Computer Society. Technical Committee on Microprocessors and Microcomputers., IEEE Standards Board, and American National Standards Institute, eds. IEEE standard for a versatile backplane bus: VMEbus. New York: Institute of Electrical and Electronics Engineers, 1988.

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3

Hansen, Irving G. Variable speed induction motor operation from a 20-kHz power bus. [Washington, DC]: National Aeronautics and Space Administration, 1989.

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4

IEEE Computer Society. Technical Committee on Microprocessors and Microcomputers. and Institute of Electrical and Electronics Engineers., eds. IEEE standard for a versatile backplane bus: VMEbus: An American national standard. New York: Institute of Electrical and Electronics Engineers, 1988.

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5

Norton, Peter. Peter Norton's Windows 3.0 power programming techniques. Toronto: Bantam Books, 1990.

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6

Germany) Fachtagung Leistungselektronik und Intelligente Bewegungssteuerungen (1999 Magdeburg. Fachtagung Leistungselektronik und Intelligente Bewegungssteuerungen: Magdeburg, 24. bis 25. März 1999. Magdeburg: Otto-von-Guericke-Universität, Fakultät Elektrotechnik, 2002.

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Internationales Symposium Kommunaler Elektrizitätswerke (4th 1990 Aachen, Germany). Der EG-Binnenmarkt für Energie und Wettbewerb: Vorträge, gehalten auf dem V. Internationalen Symposium Kommunaler Elektrizitätswerke vom 24. bis 26. September 1990 in Aachen. Baden-Baden: Nomos, 1991.

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GMA/ETG-Fachtagung Netzregelung (2nd 1990 Baden-Baden, Germany). Regelungs- und Steuerungskonzepte zur koordinierten Aktivierung von Wirk- und Blindleistung: 2. GMA/ETG-Fachtagung Netzregelung : Tagung Baden-Baden, 22. bis 23. Mai 1990. Düsseldorf: VDI Verlag, 1990.

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Institute Of Electrical and Electronics Engineers. IEEE standard criteria for digital computers in safety systems of nuclear power generating stations. New York: Institute of Electrical and Electronics Engineers, 1994.

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United States. National Aeronautics and Space Administration., ed. Description of a MIL-STD-1553B data bus Ada driver for the LeRC EPS testbed. [Washington, DC]: National Aeronautics and Space Administration, 1995.

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Частини книг з теми "BUS POWER SYSTEM"

1

Singh, Arvind R., Ranjay Singh, Abhishek Kumar, Raj Naidoo, and Ramesh Bansal. "Bus-Bar Protection." In Power System Protection in Smart Grid Environment, 273–94. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa, plc, 2019.: CRC Press, 2019. http://dx.doi.org/10.1201/9780429401756-7.

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Ning, Ke, and David Kaeli. "Bus Power Estimation and Power-Efficient Bus Arbitration for System-on-a-Chip Embedded Systems." In Power-Aware Computer Systems, 95–106. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11574859_7.

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Wang, Haifeng, and Wenjuan Du. "A Single-Machine Infinite-Bus Power System Installed with a Power System Stabilizer." In Power Electronics and Power Systems, 17–79. Boston, MA: Springer US, 2016. http://dx.doi.org/10.1007/978-1-4899-7696-3_2.

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Yadav, Gaurav, Archit, Parth Dutt, and Sankalp Sharma. "Automation of Public Transportation (Bus Stands)." In Control Applications in Modern Power System, 409–17. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8815-0_35.

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Cho, Dong Ho. "Overview of Wireless Power Transfer System for Bus." In The On-line Electric Vehicle, 97–114. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-51183-2_6.

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Chiang, Hsiao-Dong, Hua Li, Jianzhong Tong, and Yasuyuki Tada. "On-Line Transient Stability Screening of a Practical 14,500-Bus Power System: Methodology and Evaluations." In Power Systems, 335–58. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-32683-7_11.

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Jillella, Venkateswara Rao, and Sudhakara Rao Parvataneni. "Low-Power Analog Bus for System-on-Chip Communication." In Advances in Intelligent Systems and Computing, 119–28. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-0419-3_15.

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Benini, Luca, Giovanni De Micheli, Enrico Macii, Donatella Sciuto, Cristina Silvano, Luca Benini, Giovanni De Micheli, Enrico Macii, Donatella Sciuto, and Cristina Silvano. "Address Bus Encoding Techniques for System-Level Power Optimization." In Design, Automation, and Test in Europe, 275–89. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6488-3_21.

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Saha, Parnab, Sujit Pani, Bishaljit Paul, and Chandan Kumar Chanda. "Price Sensitivity in a 30 Bus Congested Power System." In Lecture Notes in Electrical Engineering, 211–17. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-4035-3_19.

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Ning, Ke, and David Kaeli. "Power Aware External Bus Arbitration for System-on-a-Chip Embedded Systems." In High Performance Embedded Architectures and Compilers, 87–101. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11587514_7.

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Тези доповідей конференцій з теми "BUS POWER SYSTEM"

1

Karuppana, Samy. "Intelligent DC Power Management System." In International Truck & Bus Meeting & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1999. http://dx.doi.org/10.4271/1999-01-3749.

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Incledon, Stephen H. "A Satellite Bus Power System." In Power Systems Conference. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2000. http://dx.doi.org/10.4271/2000-01-3639.

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Cantemir, Codrin-Gruie, Chris Hubert, Giorgio Rizzoni, Gabriel Ursescu, Chris Yakes, and Kaoru Yasuda. "High-power High-speed Road Train System." In International Truck & Bus Meeting & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2003. http://dx.doi.org/10.4271/2003-01-3380.

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Fa, Jinghuai, Chunhe Zhao, Jian Liu, and Ray T. Chen. "High-performance optoelectronic bus system." In Optoelectronics and High-Power Lasers & Applications, edited by Ray T. Chen and Julian P. G. Bristow. SPIE, 1998. http://dx.doi.org/10.1117/12.307573.

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Raje, Amit, Anil Raje, and Arvind Chaudhary. "Fast Bus Transfer Systems ¿ A System Solution Approach." In 2008 Joint International Conference on Power System Technology and IEEE Power India Conference (POWERCON). IEEE, 2008. http://dx.doi.org/10.1109/icpst.2008.4745155.

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Khuwatsamrit, Suang. "A Bi-Directional Charge-Transfer Circuit for 42V Power System." In International Truck & Bus Meeting & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2002. http://dx.doi.org/10.4271/2002-01-3068.

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Kar, Debopoma, Surajit Chattopadhyay, Kaushik Das Sharma, and Samaijit Sengupta. "Identification of faulty load bus in a multi-bus power system." In 2016 2nd International Conference on Control, Instrumentation, Energy & Communication (CIEC). IEEE, 2016. http://dx.doi.org/10.1109/ciec.2016.7513670.

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Shin, Youngsoo, Soo-IK Chae, and Kiyoung Choi. "Partial bus-invert coding for power optimization of system level bus." In the 1998 international symposium. New York, New York, USA: ACM Press, 1998. http://dx.doi.org/10.1145/280756.280829.

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Blumschein, J., R. Goblirsch, and S. Flemming. "Process bus for bus differential - challenges, solutions, and opportunities." In 15th International Conference on Developments in Power System Protection (DPSP 2020). Institution of Engineering and Technology, 2020. http://dx.doi.org/10.1049/cp.2020.0135.

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Momoh, J. A., K. D'Arnaud, and Wenjie Zheng. "Spacecraft ring-bus power system management scheme." In Energy Society General Meeting. IEEE, 2010. http://dx.doi.org/10.1109/pes.2010.5589985.

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Звіти організацій з теми "BUS POWER SYSTEM"

1

Gershberg, Alec, and Deborah Spindelman. Politics, Accountability, and Learning: Insights from the RISE Programme’s Political Economy Case Studies. Research on Improving Systems of Education (RISE), March 2023. http://dx.doi.org/10.35489/bsg-rise-2023/pe14.

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Анотація:
The RISE (Research on Improving Systems of Education) Programme political economy team focused on “adoption” (PET-A) examines the political conditions required to put learning at the center of an education system. This work stream has produced 12 historical case studies and three synthesis papers which draw on this rich material. This paper is part of the latter effort and offers a comparative analysis across five of the countries with RISE Country Research Teams (Ethiopia, Indonesia, Pakistan, Tanzania, and Vietnam), as well as additional case studies focusing on Chile and Peru. Building on the RISE systems framework (Pritchett, 2015), our political economy analysis incorporates issues of competing interests, power, and political strategy. We focus on the promoters and blockers of learning-oriented education reform and their respective powers and strategies to parse out the political contestations that are endemic to the reform processes that impact system coherence around learning. In this paper, we present a binding constraints framework to explore what a politics for learning might look like and examine areas of intervention that present critical bottlenecks impeding a country’s ability to deliver learning outcomes which, if addressed, pose the potential for large impact relative to other constraints. We draw upon the PET-A country case studies to include analysis of different factions and reform champions within government, including but not limited to the executive office (president/prime minister), Ministry of Finance, Ministry of Education, competing ministries, decentralized government levels, and local leaders. In doing, we elucidate how politics permeate nearly all accountability relationships in education systems and the likelihood that any given program will positively impact learning.
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2

Gurieiev, Viktor, Yulii Kutsan, Anna Iatsyshyn, Andrii Iatsyshyn, Valeriia Kovach, Evgen Lysenko, Volodymyr Artemchuk, and Oleksandr Popov. Simulating Systems for Advanced Training and Professional Development of Energy Specialists in Power Sector. [б. в.], November 2020. http://dx.doi.org/10.31812/123456789/4456.

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The crisis of the system of professional development and personnel training in the energy sector exists not only in Ukraine but also all over the world. The article describes the concept of development and functioning of the industry system of personnel training in the energy sector of Ukraine. The importance of using modern web-oriented technologies to improve the skills of operational and dispatching personnel in the energy sector of Ukraine is substantiated. The meth- ods of distributed power system operating modes modelling are presented. De- velopment and software tools for the construction of distributed simulating sys- tems and particular features of cloud technologies application for the creation of a virtual training centers network in the energy sector, as well as the ways to automate the process of simulating scenarios development are described. The ex- perience of introducing remote training courses for energy specialists and remote web-based training simulators based on a comprehensive model of the energy system of Ukraine is presented. An important practical aspect of the research is the application of software and data support for the development of personnel key competencies in the energy sector for rapid recognition of accidents and, if necessary, accident management. This will allow them to acquire knowledge and practical skills to solve the problems of analysis, modelling, forecasting, and monitoring data visualization of large power systems operating modes.
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Muelaner, Jody. Unsettled Issues Regarding Power Options for Decarbonized Commercial Vehicles. SAE International, September 2021. http://dx.doi.org/10.4271/epr2021021.

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While direct electrification appears to provide the most cost-effective route to decarbonization of commercial vehicles, uptake may be constrained by critical metal supply. Additionally, it will be many years before hydrogen power becomes decarbonized or if it can ever compete economically with direct electrification. An electric road system (ERS) could offer a highly efficient and cost-effective route to direct electrification that would greatly reduce the volume of batteries required, but pilot schemes are urgently needed to provide concrete data on operating costs for different ERS technologies. Furthermore, if plug-in hybrid electric vehicles could obtain most of their power from an ERS, liquid biofuels and “electrofuels” may prove useful for occasional off-grid range extension. To achieve extremely long-range for operation in remote locations, liquid fuels remain the only viable option. Unsettled Issues Regarding Power Options for Decarbonized Commercial Vehicles discusses the analysis required to understand the lifecycle energy use for different power options for decarbonized commercial vehicles.
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4

Crouch. L52201 Baseline Study of Alternate In-Line Inspection Vehicles. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), January 2008. http://dx.doi.org/10.55274/r0010954.

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It was a goal of this project to identify and evaluate nonpiston vehicle concepts that could potentially carry inspection sensors and recording apparatus into both piggable and nonpiggable pipelines. It has been suggested that pipeline integrity management in some future time might include the use of autonomous robots that would "live" in a pipeline, taking power from the moving product stream and communicating to the outside of the pipeline, from time to time, information on the condition of the pipeline. The system then would include a vehicle, sensors, data recording, power generation, and communication. Work has been done in various research centers on each of these components. Some mention will be made of the other components, but the thrust of this report is on the vehicle.
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5

Connors, Caitlin, Laura Malan, Murel Esposito, Claire Madden, Nefeli Trikka, Mel Cohen, Faun Rothery, et al. UK Public’s Interests, Needs and Concerns Around Food. Food Standards Agency, June 2022. http://dx.doi.org/10.46756/sci.fsa.ihw534.

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This qualitative and quantitative research explored UK consumer views and priorities in relation to our responsibilities around food hygiene and safety, but also around wider interests the public see critical in shaping their food choices and lives including: health and nutrition environment and ethics price quality and convenience consumer versus business power potential food futures The top priorities for consumers, and where they would like action taken on their behalf, are around ensuring: hygiene and safety standards are maintained or strengthened equitable access to safe, healthy, affordable food easy informed decision making trustworthy food information In the context of the UK, they would like to ensure farmers and UK agriculture are protected and that locally produced food is accessible. In the wider context of the system, consumers would like action on animal welfare and waste (food and packaging), and in the long term a steer towards fair, ethical and sustainable food systems.
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6

Levy, Brian. How Political Contexts Influence Education Systems: Patterns, Constraints, Entry Points. Research on Improving Systems of Education (RISE), December 2022. http://dx.doi.org/10.35489/bsg-rise-2022/pe04.

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Анотація:
This paper synthesises the findings of a set of country studies commissioned by the RISE Programme to explore the influence of politics and power on education sector policymaking and implementation. The synthesis groups the countries into three political-institutional contexts: Dominant contexts, where power is centred around a political leader and a hierarchical governance structure. As the Vietnam case details, top-down leadership potentially can provide a robust platform for improving learning outcomes. However, as the case studies of Ethiopia, Indonesia, Nigeria, and Tanzania illustrate, all-too-often dominant leaders’ goals vis-à-vis the education sector can veer in other directions. In impersonal competitive contexts, a combination of strong formal institutions and effective processes of resolving disagreements can, on occasion, result in a shared commitment among powerful interests to improve learning outcomes—but in none of the case studies is this outcome evident. In Peru, substantial learning gains have been achieved despite messy top-level politics. But the Chilean, Indian, and South African case studies suggest that the all-too-common result of rule-boundedness plus unresolved political contestation over the education sector’s goals is some combination of exaggerated rule compliance and/or performative isomorphic mimicry. Personalised competitive contexts (Bangladesh, Ghana, and Kenya for example) lack the seeming strengths of either their dominant or their impersonal competitive contexts; there are multiple politically-influential groups and multiple, competing goals—but no credible framework of rules to bring coherence either to political competition or to the education bureaucracy. The case studies show that political and institutional constraints can render ineffective many specialised sectoral interventions intended to improve learning outcomes. But they also point to the possibility that ‘soft governance’ entry points might open up some context-aligned opportunities for improving learning outcomes. In dominant contexts, the focus might usefully be on trying to influence the goals and strategies of top-level leadership. In impersonal competitive contexts, it might be on strengthening alliances between mission-oriented public officials and other developmentally-oriented stakeholders. In personalised competitive contexts, gains are more likely to come from the bottom-up—via a combination of local-level initiatives plus a broader effort to inculcate a shared sense among a country’s citizenry of ‘all for education’.
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7

Levy, Brian. How Political Contexts Influence Education Systems: Patterns, Constraints, Entry Points. Research on Improving Systems of Education (RISE), December 2022. http://dx.doi.org/10.35489/bsg-rise-wp_2022/122.

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Анотація:
This paper synthesises the findings of a set of country studies commissioned by the RISE Programme to explore the influence of politics and power on education sector policymaking and implementation. The synthesis groups the countries into three political-institutional contexts: Dominant contexts, where power is centred around a political leader and a hierarchical governance structure. As the Vietnam case details, top-down leadership potentially can provide a robust platform for improving learning outcomes. However, as the case studies of Ethiopia, Indonesia, Nigeria, and Tanzania illustrate, all-too-often dominant leaders’ goals vis-à-vis the education sector can veer in other directions. In impersonal competitive contexts, a combination of strong formal institutions and effective processes of resolving disagreements can, on occasion, result in a shared commitment among powerful interests to improve learning outcomes—but in none of the case studies is this outcome evident. In Peru, substantial learning gains have been achieved despite messy top-level politics. But the Chilean, Indian, and South African case studies suggest that the all-too-common result of rule-boundedness plus unresolved political contestation over the education sector’s goals is some combination of exaggerated rule compliance and/or performative isomorphic mimicry. Personalised competitive contexts (Bangladesh, Ghana, and Kenya for example) lack the seeming strengths of either their dominant or their impersonal competitive contexts; there are multiple politically-influential groups and multiple, competing goals—but no credible framework of rules to bring coherence either to political competition or to the education bureaucracy. The case studies show that political and institutional constraints can render ineffective many specialised sectoral interventions intended to improve learning outcomes. But they also point to the possibility that ‘soft governance’ entry points might open up some context-aligned opportunities for improving learning outcomes. In dominant contexts, the focus might usefully be on trying to influence the goals and strategies of top-level leadership. In impersonal competitive contexts, it might be on strengthening alliances between mission-oriented public officials and other developmentally-oriented stakeholders. In personalised competitive contexts, gains are more likely to come from the bottom-up—via a combination of local-level initiatives plus a broader effort to inculcate a shared sense among a country’s citizenry of ‘all for education’.
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8

Lutz, Carsten, and Frank Wolter. Modal Logics of Topological Relations. Technische Universität Dresden, 2004. http://dx.doi.org/10.25368/2022.142.

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Анотація:
The eight topological RCC8(or Egenhofer-Franzosa)- relations between spatial regions play a fundamental role in spatial reasoning, spatial and constraint databases, and geographical information systems. In analogy with Halpern and Shoham’s modal logic of time intervals based on the Allen relations, we introduce a family of modal logics equipped with eight modal operators that are interpreted by the RCC8-relations. The semantics is based on region spaces induced by standard topological spaces, in particular the real plane. We investigate the expressive power and computational complexity of the logics obtained in this way. It turns our that, similar to Halpern and Shoham’s logic, the expressive power is rather natural, but the computational behavior is problematic: topological modal logics are usually undecidable and often not even recursively enumerable. This even holds if we restrict ourselves to classes of finite region spaces or to substructures of region spaces induced by topological spaces. We also analyze modal logics based on the set of RCC5relations, with similar results.
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9

Grauer and Chapman. L52331 Exhaust Manifold Design Guidelines to Optimize Scavenging and Turbocharger Performance. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), August 2009. http://dx.doi.org/10.55274/r0010664.

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Анотація:
To develop the requisite air flow rate, the turbocharger must operate at a relatively high efficiency. But as important, the system pressure losses must be minimized to optimize turbocharger operating flexibility so that the turbine can produce sufficient power to operate the turbocharger compressor. The relationship between the various pressures and pressure losses throughout the turbocharged engine system, the turbocharger overall efficiency, ambient conditions, and the required turbine inlet temperature for sustainability is rooted in fundamental thermodynamic principles. The goal of the Exhaust Manifold Design Guidelines project was to investigate the NOX reduction role played by the exhaust manifold by exploring the impact of the exhaust manifold design on turbocharger and engine operation, as well as utilizing the abundant sets of field test data already provided by Hoerbiger Engineering Services (HES). For this project, exhaust manifold performance was defined as the capacity of the exhaust manifold to: 1) optimize cylinder scavenging efficiency; and 2) minimize the pressure differential between the compressor discharge and the turbine inlet.
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10

MacDonald, James D., Aharon Abeliovich, Manuel C. Lagunas-Solar, David Faiman, and John Kabshima. Treatment of Irrigation Effluent Water to Reduce Nitrogenous Contaminants and Plant Pathogens. United States Department of Agriculture, July 1993. http://dx.doi.org/10.32747/1993.7568092.bard.

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The contamination of surface and subterranean drinking water supplies with nitrogen-laden agricultural wastewater is a problem of increasing concern in the U.S. and Israel. Through this research, we found that bacteria could utilize common organic wastes (e.g. paper, straw, cotton) as carbon sources under anaerobic conditions, and reduce nitrate concentrations in wastewater to safe levels. Two species of bacteria, Cellulomonas uda and a Comamonas sp., were required for dentitrification. Celulomonas uda degraded cellulose and reduced nitrate to nitrite. In addition, it excreted soluble organic carbon needed as a food source by the Comamonas sp. for completion of denitrification. We also found that recirculated irrigation water contains substantial amounts of fungal inoculum, and that irrigating healthy plants with such water leads to significant levels of root infection. Water can be disinfected with UV, but our experiments showed that Hg-vapor lamps do not possess sufficient energy to kill spores in wastewater containing dissolved organics. Excimer lasers and Xenon flashlamps do possess the needed power levels, but only the laser had a high enough repetition rate to reliably treat large volumes of water. Ozone was highly efficacious, but it's use as a water treatment is probably best suited to moderate or low volume irrigation systems. This research provides critical data needed for the design of effective water denitrification and/or pathogen disinfection systems for different growing operations.
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