【作者】 初壮； 张建强； 蔡国伟；

【Author】 Chu Zhuang;Zhang Jiangqiang;Cai Guowei;Electrical Engineering College Northeast Dianli University;

【机构】 东北电力大学电气工程学院；

【摘要】 该文将配电网负荷支路与形成环网支路选定为连支,并据此将所有回路分为第1类回路及第2类回路,据此建立了配电网的回路电流-负荷节点电压网络方程。方程显式含有回路电流和负荷节点电压,网络回路阻抗与节点负荷等效阻抗分离。基于所建方程实现了配电网潮流计算的直接解法和前推回代法。进一步将模型和算法应用于三相不平衡配电网,对于单相负荷为零给直接法带来的影响提出了两种处理方法:将负荷等效为导纳,或移除零负荷回路方程。提出的前推回代法直接根据节点负荷和电压计算回路电流,使前推计算得以高效进行,极大地提高了潮流计算速度。更多还原

【Abstract】 In this paper, a radial sub-network of a given distribution network is chosen as a tree, and two types of loops, 1st loops and 2nd loops, are built according to two kinds of links, which are load branches and those which turn a radial network into a weakly-meshed one separately. Loop current & load node voltage equations are set up, in which loop currents and load node voltages are explicitly related, and network loop impedance matrix and node load equivalent impedance matrix are clearly separated. Based on the proposed network equation form, direct solution methods and a Back/Forward sweep method are designed and applied to solving several IEEE cases. Two techniques, one that loads are equivalent as admittances and one that zero-load loop equations are eliminated, is used to deal with single-phase zero load loops. Due to the proposed special network equation form, the proposed Back/Forward sweep can obtain loop currents with node loads divided by node voltages, which enhances the efficiency of the method greatly.更多还原