含多类型分布式电源的主动配电网三相潮流计算

Three-phase Power Flow Computation for Active Distribution Networks with Different Types of Distribution Generations

随着不同并网方式和控制策略的分布式电源大量接入,传统配电网的潮流算法不再适用于含大量分布式电源的主动配电网。首先建立了不同控制方式和接线方式下同步发电机、异步发电机、电力电子逆变器和双馈感应风机的三相序分量稳态模型,并在此基础上采用序分量三相解耦潮流算法对含分布式电源的主动配电网进行三相潮流计算,同时考虑了分布式电源运行中的限值约束条件。通过对IEEE 33节点三相不平衡配电系统算例进行仿真,表明该算法能有效处理各种类型分布式电源及其在运行中的限值约束,具有良好的收敛性。

While a large amount of distributed generations （DG） with different grid-connected modes and control strategies are integrated into the distribution networks, the conventional distribution network power flow algorithms are not suitable for active distribution networks （ADN）. Tame-phase sequence-component steady-state models with different control and wiring modes for different types of DGs, including synchronous generator, induction generator, power electronic converter, doubly fed induction generator, are established. A decoupled three-phase power flow algorithm based on the sequence-component is adopted to compute the power flow of three-phase ADN with DGs. The operation constraints of DGs are also considered. Simulation results on IEEE 33- bus unbalanced distribution system show its good convergence and effectiveness in handling different DGs with operation constraints.