基于改进模拟退火算法的电网脆弱线路短路潮流计算方法

以分析电网运行中线路的运行状态为出发点,提出基于改进模拟退火算法的电网脆弱线路短路潮流计算方法,提升潮流计算速度、降低线路损耗.通过分析电网脆弱线路短路潮流计算模型可知,潮流计算模型的非线性特点,导致其在计算时数值解法无法保证最佳收敛获取最优解,通过将Metropolis准则融入遗传退火算法中,利用改进的遗传退火算法判...

The Short-Circuit Power Flow Calculation Method of Power Grid Based on Improved Simulated Annealing Algorithm

Starting from the analysis of the operation status of power grid lines,a short-circuit power flow calculation method based on improved simulated annealing algorithm is proposed in this paper to improve the speed of power flow calculation and reduce the line loss. By analyzing the shortcircuit power flow calculation model of vulnerable lines in the power grid, it is known that because of the nonlinear characteristics of the power flow calculation model, the numerical solution is not able to guarantee the optimal convergence to obtain the optimal solution. By integrating the Metropolis criterion into the genetic annealing algorithm,the improved genetic annealing algorithm is used to judge the control results of the initial traction load matrix samples,and with the "isothermal state" rough adjustment and "isothermal state" fine adjustment used to obtain the optimal new solution after disturbance,and the optimal traction load sample matrix is obtained for power flow calculation to complete the optimization.The test results show that the improved algorithm has a very high fitting range between the probability density and the actual probability density of the active power of the short-circuit line when the iteration number is 20,which can reduce the line loss and power generation cost,and has good applicability.