含分布式电源的配电网改进前推回代法潮流计算

摘要

Distribution network will be changed greatly when some distributed generations (DGs) are added into it. This makes traditional method of power flow calculation failed. Therefore, an improved method which based on traditional back/forward sweep algorithm will be presented in this paper. According to the technical features of PQ model, PV model and PQ (V) model, some modifications were made for meeting the requirements of the improved method, and then it raised the improved power flow calculation method based on the explanation of basic theory of back/forward sweep algorithm. In the end, plenty of simulations with IEEE 33 buses system were carried out to illustrate the performance of the proposed method, stated the influence of different types of DG to system voltage during the changes of insert position, capacity and layout, and verified the convergence of the method in various situations.%配电网在接入分布式电源后会发生很大变化，使传统的潮流计算方法无法满足计算要求。根据PQ型、PV型及PQ（V）型节点模型的技术特点，对其进行适当处理后，在阐述前推回代法基本原理的基础上，提出改进后的潮流计算方法。应用该方法在IEEE33节点系统上进行仿真计算，计算不同类型DG在接入位置、容量及布局变化时对系统电压的影响，验证各种情况下该算法的收敛性。