摘要
在绘制交直流混合输电系统有功-电压曲线的过程中应该考虑直流的调整控制作用。如果将直流系统简单视为定功率负荷,通过仿真发现,计算得到的静态电压稳定裕度偏保守,并不能反映直流系统的控制作用。在采用连续潮流法求解交直流混合系统有功-电压曲线的过程中,根据换流器的阀组控制方式和直流系统运行特征(无功功率控制方式),调整换流变压器分接头,并根据无功控制需求投入换流站无功补偿装置,求得的有功-电压曲线及电压稳定临界点能够反映直流输电系统控制对电力系统稳定性的影响。
The influences of DC control and regulation should be considered when the power-voltage curve of AC/DC hybrid power system is drawn. Simulations show that, if DC system is regarded as constant load, the calculated static voltage stability margin could not represent the real control function of DC system. During the process of power-voltage curve drawing with continual power flow method, the tap position of converter transformer is adjusted according to the control mode of converter and the operating mode of DC system, and the reactive power compensation equipment is controlled according to var requirements. There-fore, the obtained power-voltage curve and the voltage stability critical point represent the influence of DC system control on power system stability.
出处
《电力自动化设备》
EI
CSCD
北大核心
2009年第1期50-53,共4页
Electric Power Automation Equipment
关键词
电力系统
交直流系统
换流变压器
无功补偿
有功-电压曲线
power system
AC/DC systems
converter transformer
reactive power compensation
power - voltage curves
