计及分布式电源的配电网潮流和断线故障分析算法

Research on Power Flow and Line Outage of Distribution Network with Distributed Generation

介绍了分布式电源(DG)与配电网互联的两种常用接口方式,对异步发电机和太阳能电池两种典型DG的运行方式和控制特性进行了研究.建立了各自在潮流计算中所需的数学模型,提出了计及两种DG的交直流混合迭代潮流计算方法,并在此基础上通过考虑配电网特性对灵敏度分析法进行简化,使得该方法能够快速求解断线故障模式下的系统状态,也适合于计及不同DG形式的多电源配电网系统.通过对Kumamoto 15节点配电网系统进行测试,验证了所提出的潮流计算方法以及故障算法的有效性和合理性,为进一步研究DG对电网的影响奠定了基础.

This paper introduced two familiar interfaces between DG and distribution network. The operation modes and control characteristics of two typical DG, including the asynchronous generator and solar battery, were studied and the models of DGs were proposed in the power flow calculation. In addition, an AC-DC parallel iteration algorithm of power flow was presented. Based on these analyses, the sensitivity analysis method for distribution network was simplified in order to analyze the state of system in fault mode; the method is also suited to solve power flow with DG. These models and algorithms were applied to calculate the load flow of Kumamoto 15-bus distribution system including wind power generation and solar energy. The effectiveness and rationality of the proposed method were verified and this study provides a theoretical basis for further research on the impact of electric network with DGs.