基于线性规划的电力系统无功优化

Reactive Power Optimization in Power Systems Based on Linear Programming Method

电力系统无功优化对保证电能质量及系统安全经济运行有着重要的意义.本文研究的电力系统无功优化算法是以整个网络的损耗最小为目标函数,以无功补偿设备出力、发电机端电压和可调变压器变比为控制变量,以发电机的无功出力和变压器端电压幅值为状态变量建立了线性规划模型方程.采用内点法来求解线性规划模型方程组,获得了各控制变量和状态变量的最优值.优化后的结果表明,降低了目标电力系统的网络损耗.

Reactive power optimization in power systems is very important to guarantee the electrical energy quality,the safe and economical operation in power systems.For the algorithm of reactive power optimization,presented in this paper,in order to found the linear programming model equations,the objective function is minimum total power losses,the controlled variables include the compensating capacity of reactive power,generator bus voltages and transformer tap positions,the state variables include reactive power of the generators,and the voltage amplitudes in the ends of transformers.Then,the inward method is being used to solve the linear programming model equations in order to get the optimal values of the control variables and state variables.The optimal results show that it can makes the power loss in the systems decreasing.