摘要
以特高压直流输电线路接入江西电网为背景,基于江西电网规划数据,采用BPA作为分析软件,对江西省电网的动态电压稳定性进行分析。结合稳定曲线分析工具,依据动态电压稳定判据进行仿真计算,结果表明:江西电网系统内所有500kV(除赣高安、赣芦洲、赣新余外)及其以上电压等级交流线路发生三相短路故障,江西电网无需采取任何措施,江西省内枢纽母线动态电压稳定;赣高安、赣芦洲、赣新余分别发生三相短路故障后会引起赣换流母线电压失稳,采用直流功率调制措施后失稳现象消失;直流系统发生闭锁故障后,赣换流母线电压偏高,采取切除无功补偿措施,母线电压恢复正常。
In the background of UHVDC transmission line accessing to Jiangxi power grid, on the basis of Jiangxi pow- er system planning data, the dynamic voltage stability of Jiangxi power grid is analyzed by using of BPA. With stable curve analysis tool, based on dynamic voltage stability crite- rion, simulation results show that when three-phase short circuit fault occurs on all the 500kV and above transmission lines in Jiangxi grid system （except Gan Gaoan, Gan Luzhou, Gan Xinyu）, no measures need to be taken for Jiangxi power grid, and the dynamic voltage of the hub bu- ses is stable. Voltage instability occurs in Gan converter bus when three-phase short circuit fault occurs in Gan Gaoan, Gan Luzhou, or Gan Xinyu, and the instability disappears by DC power modulation. The voltage level of Gan convert- er bus is slightly higher when block fault occuring in DC sys- tem, and the voltage level recoved to standard normal by re- moving reactive power compensation.
出处
《现代电力》
2011年第6期17-22,共6页
Modern Electric Power
基金
国家自然科学基金项目(50807013)
中央高校基本科研业务费专项资金资助(10ZG02)
教育部"111"引智项目(B08013))
