基于电压稳定裕度的无功优化规划

根据稳定裕度的目标值直接求得在合理电压水平下的最佳无功补偿配置方案,选择无功补偿设备投资和系统有功网损的综合费用作为目标函数,同时考虑满足电压水平和电压稳定性2个约束条件来探讨无功优化规划的问题.电压稳定性约束采用电压稳定裕度灵敏度分析,从而避免了优化计算过程中变量和等式、不等式约束的大幅增加;优化过程中应用连续潮流法求得电压临界点和稳定裕度灵敏度,确定无功补偿地点;应用内点法求解无功优化模型,确定无功补偿容量.系统数值仿真表明：该方法简洁、实用、有效.

Voltage stability margin based reactive power optimization method

In order to obtain the optimal reactive power configuration scheme under a suitable voltage profile according to a target value of voltage stability margin,the cost that integrates reactive equipments investment with active power loss is selected as objective function for reactive power optimization in this paper.Two sets of constraints concerning voltage profile and voltage stability are simultaneously considered to investigate the reactive power planning problems.The voltage stability constraint is analyzed with voltage stability margin sensitivity,thereby the number of equality and inequality constraints and variables is avoided to increase.In the optimization process,first,the critical voltage point and the voltage stability margin sensitivity are calculated using continuation power flow,then the buses for reactive compensation are found out;second,the reactive compensation capacity is obtained using interior-point linear programming algorithm.Power system test results verify that the reactive power optimization method is simple,practical and available.