基于全纯嵌入潮流计算的可靠节点类型转换研究

Research on Reliable Bus Type Switching for Power Flow Calculation Based on Holomorphic Embedding

针对潮流计算中节点类型转换可能导致的非可运行解问题,提出了一种基于全纯嵌入的可靠节点类型转换方法。首先,构建了考虑发电机节点无功功率和电压约束的潮流方程,并分析了目前常用的节点类型转换方法可能导致的非可运行解问题。然后基于复分析理论和全纯嵌入方法设计了潮流方程的全纯嵌入形式,并推导求解电压及发电机无功功率幂级数的递推方程。基于发电机无功功率幂级数判断发电机无功功率越限顺序,并设计了节点类型转换框架。最后,采取IEEE标准算例进行测试,表明了该方法能够较可靠地得到潮流方程的可运行解。

A reliable bus type switching method based on holomorphic embedding is proposed to address the non-operational solution issues that may arise from bus type switching in power flow calculations.Firstly,a power flow equation considering the reactive power and voltage constraints of generator buses is constructed,and the non-operational solution problems that may arise from com⁃monly used bus type switching methods are analyzed.Then the holomorphic embedding form of power flow equation is designed based on complex analysis theory and holomorphic embedding method.The recursive equations of voltage and generator reactive power series are derived.Based on the power series of generator reactive power,the sequence of generator reactive power of limit is judged and the framework of bus type switching is designed.Finally,IEEE standard calculation examples are tested to indicate that the proposed method can reliably obtain operational solutions for power flow equations.