Artykuły w czasopismach: „Transmission Power Control”

1

Nelson, R. J., J. Bian i S. L. Williams. "Transmission series power flow control". IEEE Transactions on Power Delivery 10, nr 1 (1995): 504–10. http://dx.doi.org/10.1109/61.368361.

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Watton, J. "Power Transmission and Motion Control". Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 218, nr 7 (listopad 2004): 603. http://dx.doi.org/10.1177/095965180421800708.

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Khalil, Umair, Muhammad Yousaf Ali Khan, Umer Amir Khan i Shahid Atiq. "Power Flow Control by Unified Power Flow Controller". April 2020 39, nr 2 (1.04.2020): 257–66. http://dx.doi.org/10.22581/muet1982.2002.04.

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The demand of energy usage is increasing rapidly and to meet the energy requirements, best possible transmission systems should be adopted to avoid energy losses in our transmission systems. In Pakistan’s WAPDA (Water & Power Development Authority) system, the rapid increase in load and less generation capacity has increased load shedding thought the country. The government has planned to increase the generation capacity but the supply companies are facing line load-ability, environmental constraints, power limitations problems etc. Most of the supply companies prefer to extend the existing electrical networks instead of building new network to reduce financial burdens. In this paper the implementation of the FACTS (Flexible AC Transmission Systems) Devices in an electrical network is described. The FACTS devices enhance power transfer capacity of the line without adding new transmission line. These devices also protect the system from overloading in case of any contingency in the electrical network. The control of power flow, reactive power compensation and voltage control are the main capabilities of FACTS devices. This paper describes the impacts of FACTS devices on improving the voltage stability and power handling capability of a transmission line. The proposed methods for the controllable flow of active and reactive power in a transmission line are also elaborated. A simple electrical system is examined to explain the improvement in the constraints of power system using FACTS devices.

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Khan, M. Y. A., U. Khalil, H. Khan, A. Uddin i S. Ahmed. "Power Flow Control by Unified Power Flow Controller". Engineering, Technology & Applied Science Research 9, nr 2 (10.04.2019): 3900–3904. http://dx.doi.org/10.48084/etasr.2587.

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The demand for electricity is increasing day by day and we have to produce more electrical energy to meet the load demands. Most of the experts prefer to extend the existing electrical networks over building the new network with greater costs. In this paper, the implementation of the flexible AC transmission systems (FACTS) devices in a simple electrical network is described. FACTS devices enhance power transfer capacity of the line without laying out new transmission line. These devices also protect the system from overloading in case of any contingency in the electrical network. Moreover, this paper describes the impacts of FACTS devices on improving the voltage stability and power handling capability of a transmission line. The proposed methods for the controllable flow of active and reactive power in a transmission line are also elaborated. A simple electrical system is examined to explain the improvement in the constraints of power system using FACTS devices.

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Onishi, Kenta, i Koji Ishii. "Transmission Power Control for Power-Saving in Consensus Problem". Transactions of the Institute of Systems, Control and Information Engineers 30, nr 4 (2017): 122–27. http://dx.doi.org/10.5687/iscie.30.122.

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Vu, Trieu Minh, Reza Moezzi, Jindrich Cyrus, Jaroslav Hlava i Michal Petru. "Automatic Clutch Engagement Control for Parallel Hybrid Electric Vehicle". Energies 14, nr 21 (3.11.2021): 7256. http://dx.doi.org/10.3390/en14217256.

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Automatic clutch engagement control is essential for all kinds of vehicle power transmissions. The controllers for vehicle power transmissions may include model-based or model-free approaches and must provide high transmission efficiency, fast engagement and low jerk. Most vehicle automatic transmissions are using torque converters with transmission efficiencies up to 96%. This paper presents the use of fuzzy logic control for a dry clutch in parallel hybrid electric vehicles. This controller can minimize the loss of power transmission since it can offer a higher transmission efficiency, up to 99%, with faster engagement, lower jerk and, thus, higher driving comfortability with lower cost. Fuzzy logic control is one of the model-free schemes. It can be combined with AI algorithms, neuro networks and virtual reality technologies in future development. Fuzzy logic control can avoid the complex modelling while maintaining the system’s high stability amid uncertainties and imprecise information. Experiments show that fuzzy logic can reduce the clutch slip and vibration. The new system provides 2% faster engagement speed than the torque converter and eliminates 70% of noise and vibration less than the manual transmission clutch.

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Shende, Divya, Prashant Jagtap i Rutuja Hiware. "Enhanced power quality using unified power flow controller systems". Journal of Physics: Conference Series 2089, nr 1 (1.11.2021): 012035. http://dx.doi.org/10.1088/1742-6596/2089/1/012035.

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Abstract Electrical system frequently finds and issue due to unstable nature and power quality because of, in relation to great number of nonlinear charges. So, there is need to limit inside of these difficulties and produce fine voltage quality concerns. The Flexible Alternate Flow Transmission Systems (FACTS) are the framework made out of static gear works for the AC transmission of electrical energy. Unified_Power_Flow Controls (UPFC) are the excellent FACTS tools to attach series and shunt together and it could use for framing Power transmission sensitive and active power. Here in the paper, Unified Power Flow Control (UPFC) used to clear the voltage sink and Surge. Unified Control was developed and engineered using amplifiers and rectifiers. The real and reactive modifications in congruous control orientations at the receiver side. Use of Simulink of MATLAB checks quality of energy in the use of Unified Control.

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Hsia, Kuo-Hsien, Chung-Wen Hung, Hsuan T. Chang i Yuan-Hao Lai. "Transmission Power Control for Wireless Sensor Network". Journal of Robotics, Networking and Artificial Life 3, nr 4 (2017): 279. http://dx.doi.org/10.2991/jrnal.2017.3.4.14.

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Lefebvre, S., M. Saad i R. Hurteau. "Adaptive Control for HVdc Power Transmission Systems". IEEE Power Engineering Review PER-5, nr 9 (wrzesień 1985): 28–29. http://dx.doi.org/10.1109/mper.1985.5526433.

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Prosser, J., J. Selinsky, H. Kwatny i M. Kam. "Supervisory control of electric power transmission networks". IEEE Transactions on Power Systems 10, nr 2 (maj 1995): 1104–10. http://dx.doi.org/10.1109/59.387957.

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Hsia, Kuo-Hsien, Chung-Wen Hung, Hsuan T. Chang i Yuan-Hao Lai. "Transmission Power Control for Wireless Sensor Network". Proceedings of International Conference on Artificial Life and Robotics 22 (19.01.2017): 75–78. http://dx.doi.org/10.5954/icarob.2017.os2-4.

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LEFEBVRE, S., M. SAAD i R. HURTEAU. "Adaptive Control for HVdc Power Transmission Systems". IEEE Transactions on Power Apparatus and Systems PAS-104, nr 9 (wrzesień 1985): 2329–35. http://dx.doi.org/10.1109/tpas.1985.318954.

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Suliman, Mohammed Y., i Mahmood T. Al-Khayyat. "Power flow control in parallel transmission lines based on UPFC". Bulletin of Electrical Engineering and Informatics 9, nr 5 (1.10.2020): 1755–65. http://dx.doi.org/10.11591/eei.v9i5.2290.

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The power flow controlled in the electric power network is one of the main factors that affected the modern power systems development. The unified power flow controller (UPFC) is a FACTS powerful device that can control both active and reactive power flow of parallel transmission lines branches. In this paper, modelling and simulation of active and reactive power flow control in parallel transmission lines using UPFC with adaptive neuro-fuzzy logic is proposed. The mathematical model of UPFC in power flow is also proposed. The results show the ability of UPFC to control the flow of powers components "active and reactive power" in the controlled line and thus the overall power regulated between lines.

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Kang, Sungmuk, Kyungjin Park, Seunghwan Shin, Keunsu Chang i Hoseong Kim. "Zero standby power remote control system using light power transmission". IEEE Transactions on Consumer Electronics 57, nr 4 (listopad 2011): 1622–27. http://dx.doi.org/10.1109/tce.2011.6131134.

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Oo, Thandar, Su Mon Myint i Aye Khaing Zin. "Analysis of Active Power Flow Control with Phase Shifting Transformer in AC Transmission Line". International Journal of Trend in Scientific Research and Development Volume-2, Issue-6 (31.10.2018): 666–72. http://dx.doi.org/10.31142/ijtsrd18593.

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Aswal, Pankaj, Suyash Kumar Singh, Apurv Thakur i Kshitij Gaur. "A Novel Technique of Power Flow Control in Transmission Lines Using Interline Power Flow Control". Indonesian Journal of Electrical Engineering and Computer Science 3, nr 2 (1.08.2016): 296. http://dx.doi.org/10.11591/ijeecs.v3.i2.pp296-304.

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The interline power flow control (IPFC) is the flexible AC transmission system controller (FACTS) came into accountability to control the flow of power in multiple line transmission system. The following paper demonstrates the IPFC modelling using Matlab Simulink. Power flow calculations has been made using Gauss-Seidel Method. Optimization of power in terms of real and reactive power flow is achieved by comparing the actual calculated term and the predicted value.

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Sodhro, Ali Hassan, Li Chen, Aicha Sekhari, Yacine Ouzrout i Wanqing Wu. "Energy efficiency comparison between data rate control and transmission power control algorithms for wireless body sensor networks". International Journal of Distributed Sensor Networks 14, nr 1 (styczeń 2018): 155014771775003. http://dx.doi.org/10.1177/1550147717750030.

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This article presents comparison between data rate or rate control, that is, video transmission rate control algorithm and transmission power control algorithms for two different cases. First, energy consumption due to high peak variable data rates in video transmission. Second, energy depletion due to high transmission power consumption and dynamic nature of wireless on-body channel. The former one focuses on constant (fixed) transmission power level and variable data rate (“severe” conditions), for example, medical monitoring of the emergency patients. The latter considers variable transmission power level and constant (fixed) data rate (“less severe” conditions), for example, electrocardiography measurement for patients in wireless body sensor networks. Besides, energy efficiency comparison analysis of battery-driven or video transmission rate control algorithm and transmission power control–driven or power control algorithm is presented. Finally, proposed algorithms are analyzed and categorized as energy-efficient and battery-friendly for medical applications in wireless body sensor networks.

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Zhang, Rui, Yan Hong Shen, Cun Yu, Feng Long Li, Ke Wei Pang i Ling Zhang. "Realization of Automatic Power Control in HVDC Control and Protection System". Applied Mechanics and Materials 716-717 (grudzień 2014): 1226–29. http://dx.doi.org/10.4028/www.scientific.net/amm.716-717.1226.

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The paper briefly investigates the importance of power control of HVDC (high voltage direct current) control system in the HVDC projects and focus on the actual analysis and research on the realization of automatic power control in HVDC transmission. It has the important guiding significance for the implementation of automatic power control in HVDC transmission.

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Hoodorozhkov, Sergey I., Andrey A. Krasilnikov i Matvey S. Gubachov. "Mathematical simulation of the automatic control of the tractor power unit". Izvestiya MGTU MAMI 16, nr 1 (2.11.2022): 61–69. http://dx.doi.org/10.17816/2074-0530-104578.

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BACKGROUND: Many manufacturers of agricultural tractors have machines with automatic gearboxes in their product line. The development of the design of this type of transmissions, the control system and the algorithm of its operation is an urgent technical task. The article considers the issues of mathematical simulation of the working process of the automatic transmission of a wheeled tractor and the automatic transmission control system. AIMS: The purpose of the work was to determine the optimal control laws of automatic control of a wheeled agricultural tractor engine and transmission in various operating modes using a digital model of the tractor transmission. METHODS: Simulation of working conditions is performed in the Matlab program digital software packages and its applications Simulink, Simscape. At the same time, with the help of fundamental data blocks of these applications, models of the physical components of the gearbox and the machine engine and the tractor power transmission control system, are created. RESULTS: The application procedure of the MATLabSimulink, Simscape software package for mathematical modeling of transmission operation control is considered. With the help of the developed mathematical model, a simulation of the tractor power unit operation in the main operating modes was carried out in order to optimize the characteristics of the tractor control system. The scientific novelty of the research lies in the selection and optimization of the transmission control laws in accordance with the requirements to agricultural tractors with an automatic step gearbox. CONCLUSION: The practical utility (value) of the research lies in the possibility of using the proposed control laws to develop a transmission control system for new tractors with an automatic step gearbox.

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Gogu, Ada, Dritan Nace, Supriyo Chatterjea i Arta Dilo. "Max-Min Fair Link Quality in WSN Based on SINR". Journal of Applied Mathematics 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/693212.

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This paper addresses first the problem of max-min fair (MMF) link transmissions in wireless sensor networks (WSNs) and in a second stage studies the joint link scheduling and transmission power assignment problem. Given a set of concurrently transmitting links, the MMF link transmission problem looks for transmission powers of nodes such that the signal-to-interference and noise ratio (SINR) values of active links satisfy max-min fairness property. By guaranteeing a “fair” transmission medium (in terms of SINR), other network requirements may be directly affected, such as the schedule length, the throughput (number of concurrent links in a time slot), and energy savings. Hence, the whole problem seeks to find a feasible schedule and a power assignment scheme such that the schedule length is minimized and the concurrent transmissions have a fair quality in terms of SINR. The focus of this study falls on the transmission power control strategy, which ensures that every node that is transmitting in the network chooses a transmission power that will minimally affect the other concurrent transmissions and, even more, achieves MMF SINR values of concurrent link transmissions. We show that this strategy may have an impact on reducing the network time schedule.

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Dushutin, K. A., V. A. Ageyev i Yu A. Vantyusov. "Duplex electromechanical transmission with automatic control system". Traktory i sel hozmashiny 80, nr 8 (15.08.2013): 12–13. http://dx.doi.org/10.17816/0321-4443-65706.

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Electromechanical transmission with automatic module control system including power and technological channels is suggested. Algorithm for resistance determination during segmentary-finger mover operation taking into account power expenditures for driving moment and angular velocity fluctuations is given. Operating ranges of mobile power module with mover mechanical drive and standard Т-25А tractor with КС-2,1 mover were compared.

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Schleiffer, Jean-Eric, Wilco van Harselaar, Ye Shen i Stephan Rinderknecht. "Simulative Assessment of Novel Parallel-Hybrid-Electric Powertrains: Consideration of Transmission System Power Losses". Vehicles 2, nr 1 (3.03.2020): 173–90. http://dx.doi.org/10.3390/vehicles2010010.

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Transmission system power losses influence the efficiency of hybrid powertrains. Well-established parallel-hybrid-electric powertrains employ conventional transmissions that can be treated as single-input-single-output (SISO) systems. Novel parallel-hybrid-electric powertrains, which are not based on conventional transmissions, can increase the systems potential but increase the complexity as the transmission becomes a multiple-input-multiple-output (MIMO) system. For these MIMO-transmission systems, the losses can strongly depend on the selected transmission mode and on the input torques of the power sources. This paper presents a method to automatically model the power losses of such MIMO-transmission systems. This method consists of a mathematical analysis and a design analysis, and obtains the transmission power losses as a function of the selected transmission mode, the rotational speed of the wheels, and the torques of the power sources. The model includes gear meshing losses, gear churning losses, and bearing losses. Furthermore, an extended control strategy is proposed to ensure local optimality including the consideration of the multidimensional transmission power loss characteristics. A case study is presented to demonstrate the developed methods, and shows that the inclusion of the transmission losses in the powertrain model and control strategy can be considered relevant for the simulative assessment of novel parallel-hybrid-electric powertrains.

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Wigren, Torbjorn, i Diana Yamalova. "Constrained Optimal Average Power Control for Wireless Transmission". IEEE Control Systems Letters 6 (2022): 1922–27. http://dx.doi.org/10.1109/lcsys.2021.3133632.

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Bazhenov, Ye Ye, V. V. Pobedinskiy i A. V. Berstenev. "Fuzzy control of power flows in car transmission". Traktory i sel hozmashiny 81, nr 10 (15.10.2014): 25–29. http://dx.doi.org/10.17816/0321-4443-65517.

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Galli, F., i A. Schiavi. "ENEL Power Generation and Transmission Control (PGTC) System". IEEE Power Engineering Review PER-6, nr 8 (sierpień 1986): 18–19. http://dx.doi.org/10.1109/mper.1986.5527766.

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Didikov, R. A., R. Yu Dobretsov i Yu V. Galyshev. "Power Distribution Control in Perspective Wheeled Tractor Transmission". Procedia Engineering 206 (2017): 1735–40. http://dx.doi.org/10.1016/j.proeng.2017.10.706.

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Galli, F., i A. Schiavi. "ENEL Power Generation and Transmission Control (PGTC) System". IEEE Transactions on Power Systems 1, nr 3 (1986): 10–17. http://dx.doi.org/10.1109/tpwrs.1986.4334948.

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Kenan, Zhou, i Tat Ming Lok. "Power Control for Uplink Transmission With Mobile Users". IEEE Transactions on Vehicular Technology 60, nr 5 (2011): 2117–27. http://dx.doi.org/10.1109/tvt.2011.2151217.

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Correia, Luiz H. A., Daniel F. Macedo, Aldri L. dos Santos, Antonio A. F. Loureiro i José Marcos S. Nogueira. "Transmission power control techniques for wireless sensor networks". Computer Networks 51, nr 17 (grudzień 2007): 4765–79. http://dx.doi.org/10.1016/j.comnet.2007.07.008.

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Kazama, Hiroshi, Tetsu Sakata, Shuzo Kato i Tsutomu Saka. "Transmission power control for TDMA satellite communication systems". Electronics and Communications in Japan (Part I: Communications) 77, nr 8 (sierpień 1994): 48–58. http://dx.doi.org/10.1002/ecja.4410770805.

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Yang, Zhe, Guo Zhen Tan i Fu Xin Zhang. "Power Control Optimization for Position Tracking in Vehicle Network". Applied Mechanics and Materials 721 (grudzień 2014): 740–43. http://dx.doi.org/10.4028/www.scientific.net/amm.721.740.

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We build an interference model to embody the influence from topological distribution, transmission power and packet transmission rate quantitatively. Then game theory is introduced. We take transmission power and position tracking accuracy as game strategy and payoff respectively. The existence of Nash equilibrium in vehicle network are proved. A Nash equilibrium is corresponding to the optimized transmission power vector for vehicles. Vehicle network self-adaptive power control algorithm (VNSPCA) is proposed to adjust transmission power in vehicle network. Finally, we conduct simulation and compare the performance of VNSPCA with MINPCA and MAXPCA.

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Rajpoot, Sharad Chandra, Prashant Singh Rajpoot i Kishan Gupta. "Analysis of Hvdc Power Transmission Line with Unique Power Control Room". IOSR Journal of Dental and Medical Sciences 16, nr 02 (luty 2017): 28–37. http://dx.doi.org/10.9790/0853-1602042837.

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Chitra, Subramanian, i Nanjundappan Devarajan. "Optimal power flow control of power transmission networks using graph algorithms". Journal of Vibration and Control 21, nr 16 (3.03.2014): 3320–27. http://dx.doi.org/10.1177/1077546314522086.

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Akpojedje, France O., Abel O. Olomo, Emmanuel C. Mormah i Ese M. Okah. "Optimal Power Flow Control on Power System Transmission Network using UPFC". International Journal of Engineering Trends and Technology 33, nr 3 (25.03.2016): 118–25. http://dx.doi.org/10.14445/22315381/ijett-v33p222.

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Pitz, Ciro André, Eduardo Luiz Ortiz Batista i Rui Seara. "Joint beamforming and power control using continuous updates of transmission power". Digital Signal Processing 56 (wrzesień 2016): 43–52. http://dx.doi.org/10.1016/j.dsp.2016.05.009.

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Kalinchyk, Vasyl, Vitaliy Pobigaylo, Vitaliy Kalinchyk i Viktor Skosyrev. "Reactive power control". Bulletin of NTU "KhPI". Series: Problems of Electrical Machines and Apparatus Perfection. The Theory and Practice, nr 2 (6) (9.12.2021): 36–39. http://dx.doi.org/10.20998/2079-3944.2021.2.07.

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The article investigates the methods of control of reactive power modes. It is shown that ensuring the efficiency of electricity transmission and distribution is inseparable from setting and solving problems related to reducing electricity losses in networks. Moreover, one of the most effective ways to reduce electricity losses, as well as improve its quality at the terminals of electrical receivers is to compensate for reactive power, which is carried out using various compensating devices. It is shown that the control of the reactive power mode is carried out in accordance with the Methodology for calculating the fee for the flow of reactive energy between the power transmission organization and its consumers. It is shown that the indicator of economically advantageous value of the level of reactive energy consumption can be cos φз, the value of which is predetermined. The procedure for controlling the reactive power mode contains two main stages: the stage of determining the magnitude of the possible reduction of the current cos φ above the set and the stage of determining and implementing control effects aimed at eliminating possible deviations. Preferably, it is preferable to focus on those methods that are based on the study of forecast estimates, which constitute the source information for management decisions. It is expedient to use adaptive methods of exponential smoothing as a basis for operative forecasting of electric loading. Reactive power mode is controlled by compensating units. It is shown that the control of voltage modes in the power supply system significantly affects the modes of reactive power consumption. In this regard, it is advisable to comprehensively solve the problem of reactive power control both by controlling the compensating units and the impact on the voltage regimes of the power supply system. In the calculation model, the reactive load of the distribution network is given by its static characteristics, which can be the basis for regulating the reactive load. To implement regulation in the power supply centers of electrical networks, technical means are provided on the basis of changing the transformation coefficient or generating reactive power by counter-voltage regulation.

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Vrdoljak, K., B. Kopić, M. Gec, J. Krstulović Opara i S. Sekulić. "Automatic Generation Control Application for Transmission and Generation Centres". Journal of Energy - Energija 67, nr 2 (2.06.2022): 23–32. http://dx.doi.org/10.37798/201867277.

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Recently, a new Emergency Control Centre for Albanian Transmission System Operator (TSO), which includes Supervisory control and data acquisition (SCADA) and Automatic Generation Control (AGC) applications, has been commissioned. Nowadays, an AGC application is being prepared for the biggest generation company in Croatia, as part of control centre for hydropower plants within western part of Croatia. Both of these implementations use the same AGC application, which is presented in this paper. Although AGC for TSO and AGC for Generation Centre (GC) have many similarities, their main goals are different. AGC for TSO must mainly regulate system’s frequency and area’s active power interchange to their desired values, using only power plants engaged in load-frequency control (LFC). However, AGC for GC must ensure that power production of each power unit not engaged in LFC tracks its planned value, while also ensuring that centre’s share in LFC is being respected. Albeit the AGC is standalone application, in both afore-mentioned implementations it is affiliated with SCADA application, from which it obtains all required input measurements and indications and to which it delivers calculated setpoints. Additionally, all AGC pictures are integrated into SCADA pictures as well, in order to simplify operation and monitoring functionalities. AGC for Albanian TSO controls active power generation of six hydro power plants engaged in LFC. AGC for GC West in Croatia controls active power generation of ten hydro power plants. In both implementations, communication with remote objects is done using IEC 60870-5-104 communication protocol, while communication with other control centres is done using ICCP communication protocol. Power production plans are sent to AGC either from Market Management Systems (in TSO case) or from scheduling and optimization application (in GC case).

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Li, Hong Sheng, i Ning Hui He. "Adjustment Mechanism of Node Transmission Power". Applied Mechanics and Materials 307 (luty 2013): 62–65. http://dx.doi.org/10.4028/www.scientific.net/amm.307.62.

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As to the power control protocol, in the CPC protocol each node uses the maximum transmit power choosed by all network nodes; the communication consumption of IPC protocol is smaller, but each node is using its own definition of transmission power, two-way link between nodes in the network can not be guaranteed. The sent power control based on data transmission can resolve the defaults of CPC and IPC.

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Shimamoto, Shigeru, Hideki Kubota, Hiromasa Kuwabara i Yoshikuni Onozato. "A study on satellite network configuration control employing transmission power control". Electronics and Communications in Japan (Part I: Communications) 83, nr 7 (lipiec 2000): 103–12. http://dx.doi.org/10.1002/(sici)1520-6424(200007)83:7<103::aid-ecja10>3.0.co;2-1.

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Rahmouni, Abdelkader. "Impact of static reactive power compensator (SVC) on the power grid". WSEAS TRANSACTIONS ON ELECTRONICS 11 (11.06.2020): 96–104. http://dx.doi.org/10.37394/232017.2020.11.12.

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The work presented in this paper is a contribution to the problem of controlling the reactive powers and the voltages in an electrical network. Among these control tools, the static reactive power compensator (SVC) has been chosen because of its simplicity of control. The SVC is among the FACTS 'Alternative Flexible Current Transmission Systems' devices that help to deal with problems encountered in the operation of electrical networks either in the distribution side or in the transport side. In this work, the SVC is used to control the reactive power and the voltage in an electric power transmission network. In order to improve its efficiency, three voltage regulation systems have been chosen in the control system of this compensator.

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Abdelkader, Ben Slimane, i Chelleli Benachiba. "Power Quality Enhancement Using the Interline Power Flow Controller". International Journal of Power Electronics and Drive Systems (IJPEDS) 6, nr 3 (1.09.2015): 415. http://dx.doi.org/10.11591/ijpeds.v6.i3.pp415-422.

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Interline Power Flow Controller (IPFC) is one of the latest generation Flexible AC Transmission system (FACTS). It is able to control simultaneously the power flow of multiple transmission lines. This paper presents a study of the impact the IPFC on profile of voltage, real and reactive power flow in transmission line in power system. The obtained results are interesting.

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42

Li, Guang Lei, Shu Min Sun, Yan Cheng, Hong Bo Li i Shuai Yuan. "Research on Optimization Control Strategy for Limiting Short-Circuit Current Based on Fuzzy Quantitative Control". Applied Mechanics and Materials 214 (listopad 2012): 527–30. http://dx.doi.org/10.4028/www.scientific.net/amm.214.527.

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To decrease short-circuit current, adjusting the power network operation by breaking transmission lines is the most economic and convenient measure. For large power grid, breaking transmission lines has thousands of combinations, so it's very difficult to find the best combination in a short time. Firstly, this paper formulated the sensitivity relationship between transmission line outage and impedance change. Then preliminary combinations schemes of transmission line outage were selected according to the sensitivity. Index values of factors were given using the fuzzy control evaluation. Finally, this paper determined optimal scheme from maximum priority and accomplished the accessorial intelligent optimize system of limiting short-circuit current. The rapidity and rapidity of the proposed control strategy was verified by calculating the actual power grid.

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Srivastava, Manish, Prakhar Singh, Sandeep Verma i Prince Singh. "Power Flow Control in Transmission Line by Using UPFC". International Journal of Research in Engineering, Science and Management 4, nr 4 (28.04.2021): 126–29. http://dx.doi.org/10.47607/ijresm.2021.670.

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The power transfer capacity of electrical transmission lines is typically constrained by the capacity of large signals. Economic considerations such as the high cost of long lines and the income from the supply of additional power make it possible to pursue both economically and technically viable ways to increase the stability cap intensively. On the other hand, the production of efficient ways to use the full thermal capacity of transmission systems. The power industry has already begun to be affected by fast development in the field of power electronics. This is one direct consequence of the idea of aspects of FACTS, which has become possible due to the progress realized in power electronic devices. In theory, the FACTS devices can provide rapid control of real and Var power through transmission line. The UPFC is a FACTS family member with very appealing characteristics. Many parameters can be independently controlled by this unit. An alternative means of minimizing transmission system oscillations is given by this unit. The choice of input signals and the adopted control strategy for this system in order to dampen power oscillations in an efficient and robust manner are an important issue. In order to achieve the maximum desire effect in solving the first swing stability problem, the UPFC parameters can be regulated. In bulky power transmission systems with long transmission lines, this problem arises. A MATLAB Simulink Model with UPFC to test the efficiency of the electrical transmission system is considered in this paper. The main purpose of this analysis paper is to research different studies performed in the past to minimize UPFC transmission line losses.

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Kim, Dae-Young, Zilong Jin, Jungwook Choi, Ben Lee i Jinsung Cho. "Transmission Power Control with the Guaranteed Communication Reliability in WSN". International Journal of Distributed Sensor Networks 2015 (2015): 1–12. http://dx.doi.org/10.1155/2015/632590.

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In a wireless sensor network, sensor nodes are deployed in an ad hoc fashion and they deliver data packets using multihop transmission. However, transmission failures occur frequently in the multihop transmission over wireless media. Thus, a loss recovery mechanism is required to provide end-to-end reliability. In addition, because the sensor nodes are very small devices and have insufficient resources, energy-efficient data transmission is crucial for prolonging the lifetime of a wireless sensor network. This paper proposes a transmission power control mechanism for reliable data transmission, which satisfies communication reliability through recovery of lost packets. The proposed method calculates packet reception rate (PRR) of each hop to maintain end-to-end packet delivery rate (PDR), which is determined based on the desired communication reliability. Then, the transmission power is adjusted based on the PRR to reduce energy consumption. The proposed method was evaluated through extensive simulations, and the results show that it leads to more energy-efficient data transmission compared to existing methods.

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45

Wang, Weida, Changle Xiang, Hui Liu i Shipeng Jia. "A model-predictive-control-based power management strategy for a power-split electromechanical transmission". Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 230, nr 14 (5.08.2016): 1987–2001. http://dx.doi.org/10.1177/0954407016630911.

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A power management strategy is a key necessity for power-split electromechanical transmission systems. A model predictive control strategy which is based on finite-horizon optimization and can combine the advantages of instantaneous optimization and global optimization is a good solution for online optimization of the power management. Therefore, a model-predictive-control-based power management strategy is proposed for a two-mode electromechanical transmission. A model predictive control strategy consists of two parts: a predictive model and a receding-horizon optimization algorithm. A predictive model is used for predicting future information on the electromechanical transmission states, and real-time receding-horizon optimization with a finite horizon is adopted for optimal decision making. First, the predictive model, including the battery state and the transmission output torque, which provides a priori knowledge for optimal calculation, is proposed. Then, to ensure optimal operating areas of the engine and the motors, a novel overall efficiency calculation method for the whole powertrain including the engine, the motors, the power-split coupled machine and the battery is proposed and regarded as the optimization objective. The overall efficiency not only is focused on the engine fuel economy but also determines the power loss of the motors, the battery and the planetary gears together, which enhances the fuel economy and the transmission efficiency significantly. Based on the predictive model and receding-horizon optimization, the MPC strategy is established and tested by hardware-in-the-loop simulations under Urban Dynamometer Driving Schedule and New European Driving Cycle conditions. The test results showed that the power management strategy can enhance the fuel economy and proved to be a potential real-time optimization method for power distribution in the electromechanical transmission system; this strategy can provide theoretical support for actual application of electromechanical transmission systems.

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Li, Yuye, Kaipei Liu, Xiaobing Liao, Shu Zhu i Qing Huai. "A Virtual Impedance Control Strategy for Improving the Stability and Dynamic Performance of VSC–HVDC Operation in Bidirectional Power Flow Mode". Applied Sciences 9, nr 15 (5.08.2019): 3184. http://dx.doi.org/10.3390/app9153184.

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It is a common practice that one converter controls DC voltage and the other controls power in two-terminal voltage source converter (VSC)–based high voltage DC (HVDC) systems for AC gird interconnection. The maximum transmission power from a DC-voltage-controlled converter to a power-controlled converter is less than that of the opposite transmission direction. In order to increase the transmission power from a DC-voltage-controlled converter to a power-controlled converter, an improved virtual impedance control strategy is proposed in this paper. Based on the proposed control strategy, the DC impedance model of the VSC–HVDC system is built, including the output impedance of two converters and DC cable impedance. The stability of the system with an improved virtual impedance control is analyzed in Nyquist stability criterion. The proposed control strategy can improve the transmission capacity of the system by changing the DC output impedance of the DC voltage-controlled converter. The effectiveness of the proposed control strategy is verified by simulation. The simulation results show that the proposed control strategy has better dynamic performance than traditional control strategies.

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Gyugyi, L., C. D. Schauder, S. L. Williams, T. R. Rietman, D. R. Torgerson i A. Edris. "The unified power flow controller: a new approach to power transmission control". IEEE Transactions on Power Delivery 10, nr 2 (kwiecień 1995): 1085–97. http://dx.doi.org/10.1109/61.400878.

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Liu, Han, Xueliang Huang, Dariusz Czarkowski, Linlin Tan, Jiacheng Li, Ming Zhang i Zhenxing Zhang. "Flexible Power Control for Wireless Power Transmission System With Unfixed Receiver Position". IEEE Access 7 (2019): 181767–77. http://dx.doi.org/10.1109/access.2019.2902411.

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Muta, Osamu, i Yoshihiko Akaiwa. "Peak-power-reduction scheme with adaptive transmit power control for multicarrier transmission". Electronics and Communications in Japan (Part I: Communications) 85, nr 5 (16.01.2002): 71–78. http://dx.doi.org/10.1002/ecja.1098.

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Suliman, Mohammed Yahya. "Active and reactive power flow management in parallel transmission lines using static series compensation (SSC) with energy storage". International Journal of Electrical and Computer Engineering (IJECE) 9, nr 6 (1.12.2019): 4598. http://dx.doi.org/10.11591/ijece.v9i6.pp4598-4609.

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<p>The power flow controlled in the electric power network is one of the main factors that affected the modern power systems development. The Static Series Compensatior with storage energy, is a FACTS powerful device that can control the active power flow control of multiple transmission lines branches. In this paper, a simulation model of power control using static series compensator with parallel transmission lines is presented. The control system using adaptive neuro-fuzzy logic is proposed. The results show the ability of static series compensator with storage energy to control the flow of powers components "active and reactive power" in the controlled line and thus the overall power regulated between lines. </p>

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