Voltage Characteristic Analysis and Operation Optimization of Distribution Network Considering Source Load Uncertaint

In order to deal with the problem of voltage overlimit and network loss increase caused by random fluctuation of load, wind power and photovoltaic power output in distribution network, the voltage characteristics analysis and optimization of distributed power supply were carried out. Firstly, the output uncertainty of distributed power supply is modeled, and the influence of uncertainty on power grid is analyzed by probabilistic power flow calculation. Then, taking the network loss minimization as the objective function, the mathematical optimization model is established, and the particle swarm optimization algorithm is used to comprehensively optimize the voltage of the root node, the energy storage output and the reactive power compensator output. Through the simulation calculation of IEEE33-node distribution network, it is verified that the control scheme can effectively reduce the network loss while guaranteeing the voltage quality. The results show that the comprehensive optimization strategy can significantly reduce the network loss and improve the operation efficiency of the power distribution network on the basis of ensuring the voltage stability of the distribution network.