中文摘要：

当前电网无功电压自动控制算法未能很好地提高系统电压稳定性。以电压控制分区动态无功储备作为系统电压稳定性的量度,提出一种无功电压控制优化模型。通过计算各分区关键节点的电压-无功曲线得到无功源的有效无功储备,以故障下无功源出力的最大变化量作为各分区最小无功储备,将分区动态无功储备作为目标函数和约束条件加入优化模型中,以达到在保证电压稳定裕度的同时减少系统有功网损和实现电压控制的目的。IEEE 118节点系统的仿真结果和在某实际电网自动电压控制系统中的应用表明,所提出的模型与方法是有效的。

英文摘要：

Since the existing algorithms of automatic reactive voltage control cannot effectively improve system voltage stability,an optimal reactive voltage control model with the dynamic reactive power reserve of voltage control partition as the measurement of system voltage stability is built. The effective reactive power reserve is obtained by calculating the voltage-reactive power curve of key nodes for each partition, the maximum variation of reactive power output in fault condition is taken as the minimum reactive power reserve for each area,and the partitioned dynamic reactive power reserve is introduced into the optimal model as its objective function and constraint to ensure the voltage stability margin,lower the system active power loss and control the voltage. The simulative results of IEEE l lS-bus system and the application in an automatic voltage control system of a real grid show that,the proposed model and method are effective.