A Local Loss Reduction Method Based on Injected Power Sensitivity

As an important economic indicator of power system, the reduction of the line loss rate has important significance for improving power transmission efficiency and saving energy. This paper put forward a local loss reduction method based on injected power sensitivity, which can reduce the loss of local lines quickly and effectively by adjusting the injected active power of generator nodes and the injected reactive power of reactive power compensation nodes in order to meet the requirements of safety and economic. First, this method established the model of loss reduction rate, which can transform the problem of reducing the line loss rate into the problem of adjusting the power injection. Then it determined the generator nodes and the reactive power compensation nodes which need to adjust during the process of the loss reduction by sensitivity calculation. Finally, it calculated the adjustment of injected power according to the principle of equal and opposite adjustment in pairs. Through analyzing the example of IEEE 118 node system, this method was proved the effectiveness and rapidity.