提高大规模电力系统静态电压稳定性的无功补偿方法

基于电力系统潮流方程雅可比矩阵的特征结构分析法，提出了一种以提高系统静态电压稳定性为目标的大规模电力系统无功功率优化补偿方法．该方法研究了与系统静态电压稳定性密切相关的潮流方程雅可比矩阵的最小模特征值及与其对应的左特征向量．以最小模特征值作为系统静态电压稳定裕度指标，以最小模特征值对应的左特征向量作为节点电压对无功功率变化的灵敏度指标，给出了系统在指定工况下，全电网中最有可能发生电压不稳定或电压崩溃的节点，从而为系统无功功率补偿装置的配置提供决策依据。通过对我国某区域电力系统的计算表明，该方法简洁快速，适合求解大规模电力系统电压稳定性的无功功率补偿问题．

A Reactive Power Compensation Method for Enhancing Extensive Power System Steady State Voltage Stability

A new algorithm was proposed for extensive power system VAR optimization taking steady state voltage stability into account based on eigenvalue structure analysis. The minimum eigenvalue which has relation to steady state voltage stability and its left eigenvector were studied in the algorithm based on the analysis of structure and characteristic of Jacobian matrix. In the algorithm the minimum eigenvalue is taken as the steady state voltage stability index, its left eigenvector is taken as the node voltage-reactive power sensitivity. Injections with large sensitivity, which are the most unstable node of voltage in the whole power system, have to be compensated to increase steady state voltage stability. The simulation on a real power system shows that the algorithm is valid and adapt to the extensive power system VAR optimization considering steady state voltage stability.