含分布式电源的配电网改进快速解耦法潮流计算

Improved Fast Decoupled Load Flow Calculation for Distribution Network Containing Distributed Generation

随着各种形式的分布式电源(distributed generation,DG)并网,传统的配电网潮流算法已不适用这类网络,针对实际配电网的情况,对配电网的拓扑结构进行收缩简化,加快潮流计算的速度,对配电网中R/X比大的支路补偿比与收敛性之间的关系进行了定量分析,按照DG与电网的接口方式,将DG分为直接并网型DG和逆变型DG两大类,并建立了各种DG的潮流计算模型。在此基础上,提出了可处理多种DG和配电环网运行的改进快速解耦潮流计算算法,并采用30节点、69节点、145节点配电系统作为算例,验证了该算法的有效性。

With parallel operation of various DGs and distribution network, traditional power flow algorithm is inappropri- ate for this kind of network. Aiming at practical condition of distribution network, this paper contracts and simplifies the topology structure, accelerates flow calculation speed and proceeds quantitative analysis on relation between branch compen- sation ratio of high R/X ratio in distribution network and astringency. According to interface way of DG and network, it divides DG into two kinds of direct parallel operation type and contravariant type and establishes flow calculation models for various DGs. On the basis of this, it proposes an improved fast decoupled load flow calculation algorithm to solve problem of parallel operation of various DGs and distribution network. It takes distribution systems with 30 nodes, 69 nodes and 145 nodes as examples to verify effectiveness of this algorithm.