T/CERS 0007-2020 110 kV and below substation parallel DC power supply system technical specifications

Scope

Main technical content: In recent years, battery issues have been plaguing the power industry. The parallel DC power supply system is designed to solve problems such as battery connection structure and operation and maintenance. This technology has the advantages of not shutting down when a single battery in the open-circuit DC power supply system fails, allowing batteries of different production times and brands to be mixed and used, and automatic online full-capacity verification, which helps improve the reliability of DC power supply system and the efficiency of operation and maintenance. The parallel DC power supply system has been applied on a large scale in substations with voltages of 110kV and below, and has been piloted in 220kV substations. This technology is a first in China. Up to now, there are no relevant standards for parallel DC power supply systems at the national and industry levels, and the market urgently needs such standards. The purpose of formulating this standard is to ensure that the parallel DC power supply system meets the requirements of safety and reliability and advanced technology, and to unify the design principles of the parallel DC power supply system, providing norms for all aspects such as design, testing, operation, and maintenance.

Development Information

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