针对直流闭锁故障的协调二级电压紧急控制模型  

A Coordinated Secondary Voltage Emergency Control Model for DC Blocking Fault

作　　者：李婷[1] 刘明波[1] 林舜江[1] 杨银国 温柏坚 

机构地区：[1]华南理工大学电力学院,广东省广州市510640 [2]广东电网电力调度控制中心,广东省广州市510600

出　　处：《电网技术》2012年第12期137-145,共9页Power System Technology

基　　金：国家自然科学基金项目(50777021;51207056));中央高校基本科研业务费专项资金资助项目(2011ZM0021);广东省绿色能源技术重点实验室(2008A060301002)的资助~~

摘　　要：针对直流闭锁故障提出一种改进协调二级电压控制模型,并利用南方电网实际运行数据对其控制效果进行验证,结果表明稳态协调二级电压控制模式有助于改善大容量无功补偿装置造成的分区内发电机无功出力严重不协调的情况,另一方面却基于主导节点电压变化甚微而无法实现电压恢复,因而控制效果有限;紧急协调二级电压控制模式能够实现在全网范围内多种控制手段的协调动作,并根据电网实际运行情况实时制定控制策略,避免传统直流闭锁联动控制造成的动作过量或欠缺的情况,仿真结果证明它能够明显改善直流闭锁故障后的功率转移并迅速实现电压恢复。In allusion to DC blocking fault occurred HVDC power transmission system, an improved coordinated secondary voltage emergency control （CSVC） model is proposed, and its control effect is verified by actual operation data of South China power grid. Verification results show that the steady state mode of CSVC contributes to improve the severe incoordination among reactive power outputs of generators located in the sub-regions due to large-capacity reactive power compensators, however the voltage recovery is hardly implemented due to the slight voltage variation of predominant buses, so the control effect is limited. The emergency mode of CCSV can coordinate the actions of various control measures in the whole power grid, and according to actual operating condition of power grid the control strategy can be drafted in real-time way to avoid the over-action or under-action caused by traditional coordinated control for DC blocking. Simulation results of South China power grid show that the proposed control model can evidently improve the power transition after the occurrence of DC blocking fault and rapidly implement voltage recovery.

关 键 词：协调二级电压紧急控制 时域仿真 轨迹灵敏度 直流闭锁 

分 类 号：TM734[电气工程—电力系统及自动化]