地区电网中电压无功二级优化

进化策略法以其全局收敛性、并行处理特性、通用性及鲁棒性强等优点而被应用于无功优化的研究中，但由于电力系统的自身特性和实际情况的千差万别，进化策略法有时会出现无可行解和优化效果较差的情况。文中根据地区电网的实际运行需要，提出变压器和电容器分阶段参与调节、电压网损分级优化的思想，该方法在实际系统中取得了良好的效果，证明是可行和有效的。

SECONDARY OPTIMIZATION OF VOLTAGE AND REACTIVE POWER IN REGIONAL POWER SYSTEM

The evolutionary strategies method has been applied into the study of reactive power optimization for its good performance of global convergence, parallel processing, versatility and strong robustness etc. But, sometimes, there maybe no feasible solution is available and the optimization result is unsatisfied using the evolutionary strategies because of the variability of actual situation and the special property of power system. In order to solve that, this paper proposes that transformers and capacities/reactors participate in reactive power optimization in different stages and the voltage and network loss are optimized in different grades. The feasibility and validity of the method is proved in an actual regional power system.