Challenges and methods of monitoring the occurrence of unsanctioned voltage in the power grid

Alexander Panfilov,Alexander Vinogradov,Zumeira Shakurova,Elena Zaugolnikova,Alina Vinogradova,Vadim Bolshev,V.A Golenishchev-Kutuzov

doi:10.1051/e3sconf/202128801111

Alexander Panfilov, Alexander Vinogradov + Show 5 more

Open Access

https://doi.org/10.1051/e3sconf/202128801111

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Abstract

The review of sources dedicated to the issues of monitoring in electric networks made in the article showed that the works of many scientists are aimed at developing methods, technical means, systems for monitoring current and voltage in various operation modes of power grids. The main objectives of monitoring are identified, it is shown that monitoring of parameters in the network operation modes provides observability of the network, which, in turn, allows to make timely decisions about switching in the network, regulating the parameters of the network operation modes. The relevance of monitoring for detecting cases of unauthorized voltage in the 0.4 kV power networks is shown. Similar cases lead to the risk of electric shock to people, increasing the risk of operating electrical networks. Identification of the occurrence of unauthorized voltage in the 0.4 kV network provides ways to prevent its transformation at substations of 10/0. 4 kV to a voltage of 10 kV. Therefore, it is relevant to develop methods for detecting unauthorized voltage in the 0.4 kV electric system. The methodological principles and one of the developed methods for monitoring the occurrence of unauthorized voltage in power transmission lines of 0.4 kV and blocking the reverse transformation on substations 10/0.4 kV, as well as the device for its implementation, are shown.

Highlights

Monitoring the parameters of the operation modes of rural power grids allows to ensure the implementation of one of the principles of managing the configuration countryside power grids, determined in the [1], the principle of its observability
A number of methods of signaling and blocking against reverse transformation on the 10/0. 4 kV TS have been developed, including when an unauthorized voltage appears in specific 0.4 kV lines and methods for twotransformer substations, where the implementation of control is complicated by the fact that it is possible for an authorized voltage to appear on the 0.4 kV tires after disconnecting the 10 kV side, since the 0.4 kV voltage can be applied from the second section of the TS tires (Patents of the Russian Federation NoNo 2710938, 2714495, 2713630, 2714669, 2739326, 2740002 and others)
Several methods were implemented in the course of research and development work in the Branch of IDGC of Center PJSC-Voronezhenergo, devices for implementing signaling and blocking reverse transformation at one - and two-transformer substations were made [32,33]

Summary

Introduction

Monitoring the parameters of the operation modes of rural power grids allows to ensure the implementation of one of the principles of managing the configuration countryside power grids, determined in the [1], the principle of its observability. Monitoring and control of consumers’ electricity consumption and sections of the power grids in order to identify areas with increased losses is given, for example, in [16]. Monitoring and control of the quality indicators of electricity supplied to consumers in order to regulate and maintain within the standardized limits are shown in [1719]. Monitoring and controlling the power consumption in order to identify the load of individual sections of the network allows to improve the planning of reconstruction and new construction of power grids, as shown in [1, 20]. Several monitoring methods and the design of various sensor variants are given in [1,4,7,15,16,17,18,21]

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