南澳多端VSC-HVDC工程直流断路器的控制策略研究

摘要

The paper studies mechanical HVDC circuit breaker (DCCB) additionally nstalled to Nan'ao multi-terminal VSC-HVDC project, according to demand after the operation of DC system equipped with DCCB gives the circuit breaker control, Qing'ao Station online investment and technology solutions.The new DC body circuit breaker branch defines four operating states:maintenance status, cold standby status, hot standby status and running status.The test results show that closure operation of Qing'ao Station has been successfully completed, and the operation of Jinniu Station and Sucheng Station is still normal, which verifies the effectiveness feasibility of the online exit strategy of Qing'ao Station.%针对加装直流断路器后的南澳多端柔性直流控制策略进行研究,针对加装直流断路器后直流系统的运行需求,提出了断路器控制、青澳站在线投入和退出的技术方案.新增直流断路器本体支路定义检修状态、冷备用状态、热备用状态、运行状态共4种运行状态.给出了青澳站在线投入以及退出顺控的基本流程.试验结果显示,青澳站成功完成闭锁操作,且金牛站和塑城站依旧运行正常,验证了青澳站在线退出策略的有效性和可行性.