城市配电网中电缆大规模接入条件下的无功优化方法研究

目前大型城市电网负荷低谷时段容性无功倒送现象日益凸显,危及电网安全稳定运行.基于此背景,研究了城市配电网中电缆大规模接入条件下的无功优化方法.首先,分析无功倒送对节点功率因数的影响,建立了考虑功率因数约束的含电抗器和电容器的综合无功优化模型,模型以有功网损最小为目标函数,在传统无功优化约束基础上增加了节点功率因数约束和...

Study on Reactive Power Optimization Method with Large Scale Access Condition of Cables in Urban Distribution Network

At present,capacitive reactive power reversal is becoming increasingly prominent in the period of light load in large urban network,which endangers the safe and stable operation of power grid.Based on this background,the reactive power optimization method of distribution network with access of large?scale cables is studied.The influence of reactive power reversal on nodal power factor is analyzed and an integrated reactive power optimization model with consideration of power factor constraints(containing reactor and capacitor)is established.The minimization of the real power loss is the objective function of the model.The constrains of node power factor and switching capacity of reactor are added based on traditional reactive power constraints.Then,an improved genetic algorithm with loss sensitivity is used to solve the model.By coordinating the switching of reactors and capacitors in distribution network,the optimized scheme can avoid reactive power reversal and power factor exceeding the limit with large?scale cables access.Finally,a typical high?voltage distribution network is used as an example to verify the effectiveness of the model and algorithm.