云广特高压孤岛运行方式下单极闭锁性能试验分析  

Monopole ESOF test of Yun-Guang UHVDC under islanded operation

作　　者：余荣兴[1] 刘茂涛[1] 

机构地区：[1]中国南方电网超高压输电公司广州局,广东广州510405

出　　处：《电力系统保护与控制》2014年第7期146-149,共4页Power System Protection and Control

摘　　要：2013年5月26日,为进一步验证云广特高压孤岛状态下的电压、频率控制策略,开展了孤岛方式下的单极闭锁性能试验。试验表明,孤岛系统出现单极闭锁后,机组发电功率和直流输送功率能协调控制,并恢复稳态。但整流站直流站控系统无功控制模式若为定无功功率控制模式,将导致孤岛系统交流电压控制失败,电压长期越限,引发交流滤波器过负荷跳闸,导致双极相继闭锁。试验结论为,云广特高压孤岛方式下,禁止整流站直流站控无功控制模式选择为定无功功率控制模式,同时有必要进一步开展后续试验,对当前孤岛系统交流电压控制策略是否足够安全可靠进行验证。On May 26, 2013, monopo｜e ESOF test of Yun-Guang UHVDC under islanded operation was conducted. The test shows during islanded operation, when monopole ESOF happened, the generation power and DC transmission power can restore steady state. But, if control mode of DC station control is selected to Q-mode, AC voltage may exceed safe range for a long time, and the AC filter of rectifier may trip by overload, which at last causes FASOF of another running pole. It is concluded when Yun-Guang UHVDC is under islanded operation, Q-mode is forbidden and other tests are necessary for making sure the AC voltage control logics in the present islanded operation is safe enough.

关 键 词：特高压 孤岛运行 单极 闭锁试验 过电压 控制模式 

分 类 号：TM732[电气工程—电力系统及自动化]