配电网低压动态无功补偿降损效果评估

Evaluation on Effect of Reducing Network Loss in Distribution Network by Low Voltage Dynamic Reactive Power Compensation Equipments

利用迭代法根据补偿后的网络构造了一个与补偿后网络拓扑结构和负荷均相同的虚拟补偿前网络,解决了补偿前后网络由于时段不同、负荷不同所致网络不一致的问题,为动态无功补偿效果的评估提供了一个较好的方法。该虚拟补偿前网络法在理论上具有严密性,以江门供电局10kV黄布线为例,将虚拟补偿前网络法和基于配电变压器电量的等值电阻法相结合,进行降损效果计算,证明了该虚拟补偿前网络法的可行性。

Using iteration method and based on compensated network, a fictitious uncompensated network, in which the topological structure and loads are as same as those of compensated network, is constructed, thus the inconsistency of network before and after the compensation, which is caused by different time intervals and load, is solved, and a better method to evaluate the effect of dynamic reactive power compensation is provided. This fictitious uncompensated network is strict theoretically. Taking the Huangbu lOkV transmission line of Jiangmen power supply bureau for example, the effect of reducing network loss is calculated by combining the fictitious uncompensated network method with equivalent resistance method based on electricity quantity of distributing transformers, thus it is proved that the fictitious uncompensated network method is feasible.