±800 k V直流输电工程受端换相失败对送端影响分析Analysis of Influence of Phase Commutation Failure at Receiving End of DC Transmission Project on Feed End
张艳杰,张春亮
ZHANG Yanjie,ZHANG Chunliang
摘要(Abstract):
以伊克昭—沂南±800 kV直流输电工程为研究对象,通过RTDS仿真系统模拟受端沂南站换相失败故障。分析认为:当发生换相失败时,逆变侧触发角增大,无功需求增大,交流电压降低;逆变侧换相失败的时间、长度、次数不同,对送端伊克昭站交流系统的影响程度也不一样;在直流系统大功率运行时,逆变侧换相失败对整流侧交流系统影响较大,小功率运行时对整流侧交流系统影响较小。建议换相失败时及时关注站内设备运行状态,检查阀外冷主泵、阀外冷风机、换流变冷却器、站用电系统运行工况。
Taking the ±800 kV DC transmission line from Yikezhao to Yinan as a research object, the commutation failure in Yinan inverter station at the receiving end is simulated by RTDS simulation system. Analysis shows that when the commutation failure occurs, the trigger angle of the inverter side and the reactive power demand both increase, and the AC voltage decreases. The different time, length and times of inverter side commutation failure have different influence on the AC system of Yikezhao rectifier station. When the DC system is running at high power, the commutation failure on the inverter side has great influence on the AC system on the rectifier side. While when the DC system is running at low power, it has little influence on the AC system on the rectifier side. It is suggested that when the commutation fails, the operation status of the equipment in the station should be timely paid attention to, and the operating conditions of the main pump outside the valve, the air cooler outside the valve, the cooler of the converter substation and the power supply system of the station should be checked.
关键词(KeyWords):
直流输电工程;换相失败;交流电压;触发角;阀组闭锁
direct current transmission project;phase commutation failure;AC voltage;trigger angle;valve gracp latching
基金项目(Foundation):
作者(Author):
张艳杰,张春亮
ZHANG Yanjie,ZHANG Chunliang
参考文献(References):
- [1]张潮.基于直流电压跌落因子的换相失败判断方法[J].东北电力技术,2020,41(8):20-25.
- [2]于永源,杨绮雯.电力系统分析[M].北京:中国电力出版社,2007.
- [3]张保会,尹项根.电力系统继电保护[M].北京:中国电力出版社,2010.
- [4]孟光明,崔双喜,左帅.基于谐波及直流电流变化的换相失败预测[J].安徽大学学报(自然科学版),2021,45(2):63-67.
- [5]王思超.UHVDC换相失败对送端电网SSO影响的研究[D].北京:华北电力大学,2020.
- [6]徐诗甜.特高压直流输电系统的换相失败预测控制策略研究[D].北京:华北电力大学,2020.
- [7]袁博,王颖,邵华,等.特高压直流分层接入方式下抑制连续换相失败的优化控制策略[J].华北电力大学学报(自然科学版),2020,47(2):47-55.
- [8]麻常辉,王亮,谭邵卿,等.考虑同步调相机无功特性的多馈入直流同时换相失败风险评估方法[J].山东大学学报(工学版),2020,50(3):98-103.
- [9]刘近,郑林,林志光,等.基于直接测量的换相失败检测及预测方法研究[J].电力电子技术,2020,54(3):1-4.
- [10]舒展,张伟晨,王光,等.特高压直流接入江西电网后的故障影响分析及其应对措施[J].电力系统保护与控制,2019,47(20):163-170.
- [11]景柳铭,王宾,董新洲,等.高压直流输电系统连续换相失败研究综述[J].电力自动化设备,2019,39(9):116-123.
- [12]栾向远.高压直流输电系统预测换流器换相失败的研究[D].南昌:南昌大学,2019.
- [13]孙吉波,黄国栋,林建熙.HVDC系统换相失败对整流站附近火电机组轴系扭振影响[J].云南电力技术,2018,46(3):32-36.
- [14]张凌跃,陈睿.直流系统换相失败仿真研究[J].云南电力技术,2018,46(1):68-71,76.