基于灵敏度的呼辽交直流混合输电系统电压稳定性分析

The Voltage Stability of Huliao Hybrid HVDC System Based on the Sensitivity Analysis Method

结合呼辽直流输电系统,基于灵敏度分析方法研究了该系统的电压静态稳定性问题。首先,推导了交直流混合输电系统的灵敏度计算方法,在此基础上分别计算交流输电系统几个重要节点电压幅值对直流通道和交流通道输送的有功和消耗的无功的灵敏度矩阵,直流系统不同控制方式对直流系统输送的有功和消耗的无功的灵敏度矩阵以及不同控制方式下几个重要节点的电压灵敏度。结合上述电压静态稳定的灵敏度指标,研究了呼辽交直流混合输电系统的运行控制方式和提高电压稳定性的措施,为呼辽交直流混合输电系统的安全、稳定运行提供技术参考。

This article, integrated Huliao HVDC transmission system closely, makes a study of the voltage static stability of the sys- tem based on the sensitivity analysis method. First, it deduces a hybrid HVDC system sensitivity calculation method, on the basis of which, the active and reactive power sensitivity matrix of the voltage amplitude of several AC transmission system important node to the DC channel and AC channel is calculated, so is the active and reactive power sensitivity matrix by DC system and several important node voltage sensitivity under different control mode. Combined with the voltage stability sensitivity indicators above, it maeks study on the control mode of Huliau hybrid HVDC system and the measures of improving voltage stability, providing technical reference for the safe and stable operation of Huliao hybrid HVDC system.