大受端电网内交直流相互影响研究  

Study of AC/DC interactions for large receiving-end grids

作　　者：黄志龙[1] 杨卫东[2] 杨增辉[3] 曹路[1] 徐泰山[2] 谢传治[2] 姚海城[2] 董宸[2] 

机构地区：[1]华东电网有限公司,上海200002 [2]国网电力科学研究院,南京210003 [3]华东电力试验研究院有限公司,上海200437

出　　处：《华东电力》2009年第10期1650-1656,共7页East China Electric Power

摘　　要：在深入研究直流实际控制保护策略基础上,建立了满足交直流交互影响分析的大受端电网不同发展时期的交直流交互影响全维仿真研究平台。对于受端电网内各直流节点附近220 kV低压网络的动态等值,提出了应尽可能体现出原有网络电压支撑效应的观点。采用电磁暂态、机电暂态和实时仿真等手段,深入研究了交直流系统间的交互影响机理,指出华东端电网的交流单一或严重故障虽会导致多回直流发生短暂的同时换相失败,但并不会导致它们发生闭锁,因而不会威胁到未来华东电网的安全稳定运行。Based on study of DC control and protection strategies,a whole simulation platform of large receiving-end grid used for AC/DC interactions study was established.As to the dynamic equivalence of the 220 kV and below voltage level networks which locate nearby DC systems,it was proposed that the dynamic voltage support of the original network should be fully reflected.Electromagnetic and electric mechanical simulations as well as the RTDS method were used to study AC/DC interactions involved in large receiving -end grids, and it was pointed out that general or serious AC faults occurred at DC inverter side may cause a short period of simultaneous commutation failure of multiple DC lines but will not lead to lockout.

关 键 词：大受端电网 交直流相互影响 换相失败 动态等值 闭锁 实时数字仿真 

分 类 号：TM712[电气工程—电力系统及自动化]