A three-port DC circuit breaker control and protection system

Abstract

The invention discloses a three-port DC circuit breaker control and protection system. An input end of the control and protection system is used for connecting with an upper-layer DC control and protection system, and an output end is used for connecting with a three-port DC circuit breaker. The control and protection system comprises a control host, a control sub-machine, a switch control module,a current transformer and an overcurrent protection module, wherein the control host is connected with the control sub-machine and the overcurrent protection module and is used for monitoring, controlling and protecting the three-port DC circuit breaker, the control sub-machine is connected with the switch control module and is used for monitoring a state of the switch control module and issuinga control instruction to the switch control module, and the overcurrent protection module is connected with the current transformer and is used for acquiring a current of the three-port DC circuit breaker and performing overcurrent judgment. The control and protection system has a protection function of a three-port DC circuit breaker body, and the safety of the three-port DC circuit breaker bodyunder an extremely fault condition is ensured.

Description

technical field [0001] The invention belongs to the field of power systems, in particular to a control and protection system for a three-port DC circuit breaker. Background technique [0002] The control and protection system is based on the measurement system and early warning system to realize equipment protection, system protection and other automatic control functions of the system. The functions of the control and protection system are mainly to analyze the stability based on the data online, determine the real-time transmission capacity, analyze the risk of successive failures, and optimize the control decision-making, which not only ensures the emergency shutdown, but also avoids misoperations caused by instrument failures. [0003] Such as figure 1 As shown, the existing three-port DC circuit breaker is respectively connected to three power transmission and distribution lines through three ports, and the three ports are connected to form a triangular ring closed cir...

AI Technical Summary

Problems solved by technology

The structure of the above-mentioned three-port DC circuit breaker is complicated, so it is urgent to adopt a mature control and protection system during the operation of the three-port DC circuit breaker to realize the control of each branch current and each switch in the three-port circuit breaker, and Safeguarding Three-Port DC Circuit Breakers in Fault Conditions

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