Digital Technologies of Control and Monitoring of Power Supply System Modesat MEI Power Station

Author(s):  
M. G. Popov ◽  
O. A. Vasilyeva ◽  
S.S. Sarafanova ◽  
D. N. Asainov
2021 ◽  
Vol 75 (2) ◽  
pp. 109-112
Author(s):  
N.P. Kondrateva ◽  
A.A. Shishov ◽  
R.G. Bolshin ◽  
M.G. Krasnolutskaya

Nowadays, 75% of emergencies at power supply facilities are caused by single-phase ground faults. The currently used methods of thermal imaging and ultrasonic testing do not allow accurately identify the cause of accidents in electric power distribution systems. The current search generators, due to their low power, cannot cover the entire section of the diagnosed network. The article suggests the use of digital technologies for the intelligent diagnostics of the insulation of power supply system with insulated neutral in the operating mode, allowing on-line diagnostics of the network and analyzing the data obtained for the early prevention of emergency situations. In order to avoid disconnecting sections and diagnose the system in operating mode, it is proposed to check the system using a currentlimiting capacitor, which will be connected to the live parts of each phase under voltage and accurately determine the location of a single-phase short circuit for any number of feeders. The relevance of these studies is due to the fact that, for example, during two years at one of the manufactures 19 emergencies related to single-phase ground faults were recorded. Four of these cases led to a complete stop of the production. Therefore, the development of digital technologies for the implementation of smart diagnostics of the insulation of an energized power supply system with insulated neutral will be of interest to practitioners, scientists, researchers, graduate students and other specialists seeking to study the latest achievements in smart agribusiness for their subsequent application in the real world.


Author(s):  
В.В. Бабенко ◽  
И.А. Хайченко ◽  
Ю.В. Нефедов

Рассматривается способ координации настроек локальных систем автоматического регулирования установок компенсации реактивной мощности (РМ) городской системы электроснабжения для достижения оптимального режима работы всей системы по критерию минимума потерь электрической энергии. На основе анализа базы данных автоматизированной системы коммерческого учета электроэнергии МУП «Воронежская горэлектросеть» за пять лет определено, что величина tg φ (коэффициент реактивной мощности) не соответствует нормируемым ГОСТом значениям и требует существенной корректировки для снижения потерь электрической энергии. Оптимальный режим управления рассматриваемой системой электроснабжения по месту подключения и величине реактивной мощности требуемых установок компенсации возможен при правильном соотношении выбранных критериев локальной и системной оптимизации режимов работы ГЭС. Определено, что для получения экономически обоснованного эффекта от оптимизации режима работы ГЭС по критерию достижения tg φ не более 0,35 необходима установка устройств компенсации РМ как минимум на 50% -70% всех параметров реактивной мощности узла нагрузки (РП) энергоемких потребителей. Кроме того, показана целесообразность использования при данном способе компенсации реактивной мощности регрессионного принципа автоматического управления, базирующегося на методе факторного планирования эксперимента. При наличии базы данных параметров городской системы электроснабжения возможно получить серию уравнений регрессии, являющихся основой для настроек локальной системы управления установок компенсации реактивной мощности, которые необходимо установить в основных узловых точках РП МУП «Воронежская горэлектросеть». Установлено, что сформированные на базе уравнений регрессии параметры для системы управления успешно могут быть интегрированы в современные цифровые микропроцессорные регуляторы установок компенсации реактивной мощности сложных систем электроснабжения This article discusses how to coordinate the settings of local automatic control systems of reactive power compensation plants of a city power supply system in order to achieve the optimal mode of operation of the entire system according to the criterion of minimum loss of electric energy. Based on the analysis of the database of the automated system of commercial accounting of electricity of Municipal Unitary Enterprise "Voronezh City Electric Network" for five years, it was determined that the value of tg φ (reactive power factor) does not correspond to the values normalized by GOST and requires significant adjustment to reduce electrical energy losses. The optimal control mode of the considered power supply system at the point of connection and the value of reactive power of the required compensation plants is possible with the correct ratio of the selected criteria of local and system optimization of the hydroelectric power station operation modes. It was determined that in order to obtain an economically justified effect from optimizing the mode of operation of the hydroelectric power station according to the criterion of tg φ reaching a maximum of 0.35, it is necessary to install RM compensation devices at least 50% -70% of all RP energy-intensive consumers. In addition, the utility of using the regression principle of automatic control c based on the factor planning method of the experiment in this reactive power compensation method is shown. At sufficiently low costs for collection, processing of statistical material and optimization calculations, it is possible to obtain a series of regression equations, on which the calculated part of the settings of the control system of reactive power compensation plants, which should be installed in the main nodes of the Voronezh City Electric Network, is based. It was found that the parameters generated on the basis of regression equations for the control system can be successfully integrated into modern digital microprocessor regulators of reactive power compensation plants of complex power supply systems


2019 ◽  
Vol 2 (1) ◽  
pp. 8-16 ◽  
Author(s):  
P. A. Khlyupin ◽  
G. N. Ispulaeva

Introduction: The co-authors provide an overview of the main types of wind turbines and power generators installed into wind energy devices, as well as advanced technological solutions. The co-authors have identified the principal strengths and weaknesses of existing wind power generators, if applied as alternative energy sources. The co-authors have proven the need to develop an algorithm for the selection of a wind generator-based autonomous power supply system in the course of designing windmill farms in Russia. Methods: The co-authors have analyzed several types of wind turbines and power generators. Results and discussions: The algorithm for the selection of a wind generator-based autonomous power supply system is presented as a first approximation. Conclusion: The emerging algorithm enables designers to develop an effective wind generator-based autonomous power supply system.


2019 ◽  
Vol 139 (12) ◽  
pp. 810-813
Author(s):  
Katsuhiro SHIMADA ◽  
Kunihito YAMAUCHI ◽  
Shinichi MORIYAMA

2013 ◽  
Vol 133 (12) ◽  
pp. 961-966
Author(s):  
Hitoshi Hayashiya ◽  
Kazushi Matsuura ◽  
Norio Koguchi ◽  
Hiroshi Yamamoto ◽  
Tetsuo Fujita

2018 ◽  
pp. 8-13
Author(s):  
Boris M. ANTONOV ◽  
◽  
Nikolai N. BARANOV ◽  
Konstantin V. KRYUKOV ◽  
Yuri K. ROZANOV ◽  
...  

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