同杆并架±500kV直流系统间相互影响的实时仿真分析  

Real-Time Digital Simulation Analysis on Interaction Between Two±500 kV HVDC Systems Erected on the Same Tower

作　　者：张民[1] 石岩[1] 

机构地区：[1]北京网联直流工程技术有限公司,北京市东城区100005

出　　处：《电网技术》2007年第1期44-49,共6页Power System Technology

摘　　要：针对葛洲坝—南桥改造工程可能采用的直流线路同杆并架方案,利用实时数字仿真器对2个双极的直流工程进行建模,深入研究了同杆并架的2个直流系统间的相互影响,研究内容包括葛洲坝—南桥一回、二回采用同杆并架技术输电时,在直流线路的首端、中点、末端分别发生单极、2极(同极性/不同极性)线路、3极线路200ms或800ms金属性接地故障时,故障极对健全极的影响、系统恢复情况以及系统过电压情况；单极、双极正常启动或停运、紧急停运时对运行极的影响；还比较了常规直流系统(以三常直流为例)出现单极线路首端、中点、末端故障时与双回直流同杆并架时的区别。研究成果已被应用于葛洲坝—南桥直流增容工程的可行性研究中。According to the schemes of double circuits erected on the same tower which may be adopted in the renovation project of existing ±500 kV HVDC project from Gezhouba in Hubei province to Nanqiao in Shanghai, the realtime digital simulator （RTDS） is used to establish the model of two bi-polar HVDC projects, and the interaction between the two ±500 kV HVDC projects erected on the same tower is researched in detail. Following contents are included in this research item： for the condition that two HVDC projects are erected on the same tower for power transmission from Gezhouba to Nanqiao, the influence of faulty pole on healthy pole, the recovery of healthy system and the transient overvoltage in healthy system when 200ms or 800ms metallic grounding fault occurs at the beginning terminal, mid-point and ending terminal in monopole line, bi-pole （like polarity/unlike polarity） line and tri-pole line respectively; the influence on operating poles under normal startup or outage as well as the emergency shutdown of monopole line and bi-pole line. In addition, taking the HVDC system from Three Gorges to Changzhou for example, the differences between conventional HVDC system and double HVDC systems erected on the same tower are compared while the fault occurs at the beginning terminal, mid-point and ending terminal of conventional monopolar line. Research results are applied in the feasibility study of Gezhouba-Nanqiao HVDC Increasingcapability project.

关 键 词：直流输电 同杆并架 实时数字仿真器 

分 类 号：TM721.1[电气工程—电力系统及自动化]