计及TCSC的电压稳定性灵敏度指标计算

鉴于电力系统中日益出现的动态无功不足而导致的电压稳定性问题，基于潮流计算法，将可控串联补偿装置(thyristor controlled series compensator，TCSC)的稳态模型加入到潮流方程中，推导出带有TCSC的雅可比矩阵，并将其用于计算电压稳定性灵敏度。在此基础上，用灵敏度指标对比计算和分析了TCSC安装前后整个系统和TCSC安装节点的电压稳定性，结果表明，安装TCSC后的电压稳定性灵敏度指标有较大改善。运用电力系统分析工具PSAT1.3.4对WSCC-3机9节点系统进行仿真，结果再次验证了文中方法的正确性、有效性和可行性。

Calculation of Sensitivity Index for Voltage Stability of Power System With Thyristor Controlled Series Compensator

In view of more and more voltage instability caused by the insufficiency of dyanmic reactive power,based on power flow calculation method and by means of adding steady state model of thyristor controlled series compensator(TCSC) into power flow equation,the Jacobian matrix with TCSC is derived and applied in the sensitivity calculation of voltage stability. On this basis,the voltage stability of whole power system before and after the installtion of TCSC and that of the node where TCSC is configured are compared and analyzed by sensitivity index. Results show that the sensitivity index of voltage stability is evidently improved while TCSC is configured. By use of power system analysis tool PSAT1.3.4,the simulation of WSCC 3-machine 9-bus system is simulated,the correctness,effectiveness and feasibility of the proposed method is validated by simulation results.