考虑负荷电压静特性的含分布式电源的配电网潮流计算

针对传统前推回代算法在考虑负荷静态电压特性时存在迭代次数较多、对负荷静态电压特性变化呈强敏感性的问题,提出了一种改进前推回代法。与传统前推回代法相比,改进算法的效率对负荷静态电压特性变化的敏感性较弱。研究了各种类型分布式电源(distributed generators,DG)在改进前推回代算法中的计算模型,克服了前推回代法只适用于P、Q恒定型负荷节点的限制。以IEEE 36节点系统为例验证了算法和模型的有效性和鲁棒性,并分析了不同负荷静态电压特性、不同类型DG对算法收敛性及系统潮流的影响,为DG合理接入配电网提供参考。

Power Flow Calculation of Distribution System With Distributed Generation Considering Static Load Characteristics

In allusion to such defects as too many iteration times,calculation inefficiency and strong sensitivity to the variation of static load characteristics in tranditional back forward sweep method when it is used to solve power flow in distribution network with distributed generation(DG) under the presupposition of taking static load characteristics into account,an improved back forward sweep method is presented.Comparing with traditional back forward sweep method,the improved one is efficient and not so sensitive to the variation of static load characteristics.The calulation models of various DGs used in the improved back forward sweep method are researched and the restriction that tranditional back forward sweep method is only applicable to load bus with constant active and reactive power.Taking IEEE 36-bus system for example,the effectiveness and robustness of the proposed method and calculation models are verified,and the impacts of different static load characteristics and various DGs on the convergence of both the proposed method and system power flow are analyzed.