南方电网中多个直流系统间的协调功率恢复策略  

A COORDINATED RECOVERY STRATEGY FOR 3 HVDC SYSTEMS INVOLVED IN THE SOUTH CHINA POWER GRID

作　　者：杨卫东[1] 薛禹胜[1] 荆勇[2] 晁剑[2] 黄蔚亮[2] 洪潮[2] 杨彬彬 

机构地区：[1]国电自动化研究院,江苏省南京市210003 [2]国家电力公司南方公司,广东省广州市510620

出　　处：《电力系统自动化》2003年第15期67-70,共4页Automation of Electric Power Systems

基　　金：国家重点基础研究专项经费资助项目 (G19980 2 0 3 0 1);国家电力公司资助项目 (SP11 2 0 0 1 0 1 0 4)

摘　　要：提出了一种当协调馈入点间电气距离很近时多个直流输电系统间的协调功率恢复策略 ,即在交流侧故障被切除后的系统恢复期间 ,在各直流子系统的逆变侧采用定交流电压控制 ,同时在整流侧修改直流功率的给定值。该策略可以改善南方电网中 3个直流系统的恢复性能 ,在某些严重故障发生后 ,不切或少切负荷便可使系统稳定 。Concerned with the South China power grid, a coordinated recovery strategy for its three HVDC systems is proposed in this paper. A constant ac voltage control is applied at inverter side during a short period after an ac fault is removed, and a staggered recovery strategy is adopted for different HVDC subsystems by modifying their power order at rectifier side during the recovery period. Simulation results on the practical grid show that, compared with the conventional control strategy, the recovery performances of 3 dc links can be improved a lot with the proposed recovery strategy and no or less load shedding is needed to make the system stable. Simulations also illustrate its robustness in response to various contingencies. This project is supported by National Key Basic Research Special Fund of China (No. G1998020301) and State Power Corporation of China (No. SP11-2001-01-04).

关 键 词：直流输电系统控制 多直流馈入输电系统 协调恢复 稳定性 换相失败 

分 类 号：TM721.1[电气工程—电力系统及自动化]