天广直流输电系统控制策略改进建议  

Suggestions to Improve Control Strategy in Tianshengqiao-Guangzhou HVDC Transmission System

作　　者：朱韬析 欧开健 王超[3] 

机构地区：[1]南方电网超高压输电公司广州局,广州510405 [2]南方电网技术研究中心,广州510623 [3]浙江电力调度通信中心,杭州310007

出　　处：《南方电网技术》2009年第1期27-31,共5页Southern Power System Technology

摘　　要：基于天广直流输电系统基本控制策略以及用于控制的实际直流电流和实际直流电压的计算原理,分析了不正常的直流电流测量结果产生的负面影响。发现这种不正常性可能导致用在控制中的电流裕度等于逆变侧的直流电流测量误差,从而控制策略开关启动。建议将电流裕度设定为0.12p.u.,以保证直流输电系统的安全稳定运行。这一改进措施经RTDS仿真得到了验证。Based on the basic control strategy used in Tianshengqiao-Guangzhou HVDC transmission system and the calculational theory of actual DC current and DC voltage for control, the negative influence of abnormal DC current measurement is analyzed, It is found that this abnormity would cause the current margin used in control to be equal to the current measure error at inverter side, which would initiate the switch of control strategy. The result suggests that it is better for the current margin to be set to 0.12 p.u. to enhance the security and stability of the HVDC system, and this improvement measure is affirmed by RTDS.

关 键 词：高压直流输电 定电流控制 直流电流测量异常 实时数字仿真器 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM743