国网江苏省电力公司科技项目(J2017073)；国家自然科学青年基金资助项目(51707090)
统一潮流控制器(UPFC)作为功能全面的电力电子设备，需具备较高的故障穿越能力。在交流线路发生故障时，UPFC的串、并联换流器均会承受故障的冲击，且对于线路的瞬时性故障，需要UPFC在线路故障清除后继续运行。从UPFC的结构和故障特性着手进行分析，提出了UPFC在交流系统故障时的处理策略，使其具备系统故障时的故障穿越能力；UPFC并联侧通过控制策略的优化能在故障期间持续运行，串联侧通过控制保护策略与线路保护和重合闸逻辑的配合，能快速退出及重新启动。该策略经过了人工短路试验的验证，并在南京UPFC示范工程运行过程中通过了系统实际故障的考验，该策略的合理性得到了验证。
As afull-featured power electronic equipment, unified power flow controller (UPFC) need fault ride-through ability. UPFC series and parallel inverter parts will withstand the impact of failure duringAC line fault.And for instantaneous fault of the line, theUPFC needstocontinue to run after theline fault is cleared.Based on the structure and fault characteristics of UPFC，the processing strategy of UPFC in the case of AC system failure is put forward, so that it has the fault ride-through ability.The UPFC parallel side can run continuously during the fault by use optimization control strategy. And the serial side can exit and restart quickly, with the coordination of UPFC control and protection strategy, line protection and reclosing logic.The rationality of the strategy is verified by manual short circuit test and the actual system fault test during the operation of Nanjing UPFC demonstration project.
潘磊,李斌,杨光,董云龙,黄如海,邱德锋,孔祥平.交流系统故障时统一潮流控制器处理策略[J].电力工程技术,2017,36(6):132-137
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