Study on Coordinated Optimization of the Gird Voltage Control Strategy Considering Comprehensive Cost

The spoilage of the discrete reactive power devices such as shunt capacitor or on-load tap changer by control are far greater than that of the continuous reactive power devices such as generator or SVG. To reduce the comprehensive cost including the gird loss and the device spoilage, This paper proposed a novel gird voltage control coordinated optimization strategy. The comprehensive cost including the gird loss and the device spoilage is used as an objective function. The corresponding calculation method based on improved genetic algorithm is presented. The proposed strategy would be combined with the three-level voltage control mode of existing AVC systems. The simulation contrast results in IEEE-14 system show that the proposed strategy is more reasonable than the traditional control strategy without consideration of the discrete reactive power devices spoilage. Especially in the case of network load periodic change, the repeated controls of the discrete devices are effectively avoided by using the proposed strategy.