| 引用本文: | 王少辉,唐飞,向农.华东电网多直流同时换相失败仿真分析[J].电力系统保护与控制,2017,45(12):16-21.[点击复制] |
| WANG Shaohui,TANG Fei,XIANG Nong.Commutation failure simulation analysis of East China power grid multiple HVDC lines[J].Power System Protection and Control,2017,45(12):16-21[点击复制] |
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| 摘要: |
| 随着馈入华东电网直流条数及输送容量的不断增加，交流系统故障引起的多直流同时换相失败稳定性问题日益突出。采用PSD-BPA暂态稳定仿真程序，对2016年华东电网丰大运行方式下的多直流同时换相失败问题进行了仿真分析。结果表明:上海地区及上海—江苏、上海—浙江联络线附近多数500 kV线路发生三相短路故障均会引起八回直流全部发生换相失败。多直流同时换相失败会影响受端系统稳定运行，但一般不会造成系统失稳，影响程度与等效换相失败时间有关。等效换相失败时间和负荷模型会对换相失败恢复过程中的换流母线电压造成影响。 |
| 关键词: 多直流换相失败 等效换相失败时间 交流系统故障 稳定性 换流母线电压 |
| DOI：10.7667/PSPC160910 |
| 投稿时间：2016-06-20修订日期：2016-09-26 |
| 基金项目:国家电网公司科技项目“特高压直流连续换相失败、再启动工况下安全稳定控制技术研究” |
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| Commutation failure simulation analysis of East China power grid multiple HVDC lines |
| WANG Shaohui,TANG Fei,XIANG Nong |
| (School of Electrical Engineering, Wuhan University, Wuhan 430072, China) |
| Abstract: |
| With the increase of number and capability of DC transmission lines feeding into East China power grid, the stability problem caused by commutation failure of multiple DC systems which resulted by AC faults has been more serious. By use of PSD-BPA transient stability simulation program, commutation failure of multiple HVDC of East China power grid in summer peak load operation mode in 2016 is simulated and analyzed. Simulation results show that commutation failure of eight DC transmission lines could be caused by three-phase short-circuit fault occurred in 500 kV lines in Shanghai area and nearby tie-lines; commutation failure of multiple DC lines impacts but not destroys the stability of the receiving-end system, and the influence degree is related with the equivalent commutation failure time; and inverter bus voltage during the recovery process of commutation failure can be affected by equivalent commutation failure time and load model. This work is supported by Science and Technology Project of State Grid Corporation of China "Study on Safety and Stability Control Technology for Extra High Voltage DC Successive Commutation Failure and Restart Condition |
| Key words: commutation failure of multiple DC lines equivalent commutation failure time AC system faults stability commutation bus voltage |
