中性点不接地配网潮流算法研究  

Study on Power Flow Algorithm for Ungrounded Distribution Networks

作　　者：索南加乐[1] 付伟[1] 刘文涛[1] 孙丹丹[1] 王向兵[1] 齐军[2] 

机构地区：[1]西安交通大学电气工程学院,陕西省西安市710049 [2]内蒙古电力(集团)有限责任公司,内蒙古自治区呼和浩特市010020

出　　处：《中国电机工程学报》2006年第10期86-91,共6页Proceedings of the CSEE

摘　　要：针对中性点不接地系统无零序通路的特点,推导出一种新的适用于负荷不对称配网的序分量潮流算法。该方法将不对称的三相负荷转化为正序功率和负序功率,同时引入耦合功率,将正序、负序功率解耦,仅求解正序潮流,而节点负序分量则通过耦合功率求出。该算法将现有配网三相潮流算法中的3n阶矩阵降为n阶,大大降低了计算量。将该算法和传统方法分别应用于某一基于统计数据的19节点实际系统,对两者的计算结果进行比较,并分析差异产生的原因。以一个基于实时数据的28节点仿真系统算例验证了该算法的正确性。A novel sequence-component-based algorithm is developed for calculation of three-phase unbalanced load flow in ungrounded distribution network, where zero sequence network is open. With this algorithm, the three-phase load is resolved into positive/negative sequence power and coupling power, thus, decoupling three phase power flow into sequence component power flow. The three-phase power flow can be obtained by just finding the positive sequence power flow and then finding the negative sequence component from the coupling power. Compared with the existing methods, the Jacobian matrix with the proposed algorithm is of much lower order, thus substantially reducing the computation burden. The proposed algorithm, together with a reference algorithm, has been simulated on an actual 19-bus system using statistic load data. And then it is simulated on a 28-bus test system using real-time load data. The results indicate the validity and effectiveness of the presented algorithm.

关 键 词：电力系统 配电网 三相潮流 序分量 

分 类 号：TM714[电气工程—电力系统及自动化]