节点类型扩展潮流计算及其可解性研究  

Study on Bus-type Extended Load Flow and Its Solvability

作　　者：郭烨[1] 张伯明[1] 吴文传[1] 

机构地区：[1]电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系),北京市海淀区100084

出　　处：《中国电机工程学报》2011年第13期79-85,共7页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50707013)~~

摘　　要：传统潮流计算中包含3种类型的节点,即PQ节点、PV节点和Vθ节点。潮流计算在数学上属于非线性代数方程组求解问题。潮流计算要可解,要求方程组中线性无关的方程数与未知量数目相等,对节点类型并没有限制。提出一种可考虑任意节点类型的节点类型扩展潮流算法,在许多潮流调整应用场合,采用该算法能够更方便地实现调节目标。给出基于快速分解法的节点类型扩展潮流计算的求解算法,并对节点类型扩展潮流计算的可解性问题进行详细讨论,给出一个直观的基于拓扑结构的节点类型扩展潮流可解性判据,并通过算例验证该可解性判据的有效性。There are three types of buses in the ordinary load flow calculation, which are PQ, PV and Vθ. Since load flow calculation is to solve a set of nonlinear algebraic equations, it is necessary that the number of linearly independent equations equal to the number of unknown state variables, without limitation for bus types. A bus-type extended load flow algorithm which could consider all bus types was introduced in this paper. This proposed general method can make some load flow adjusting much easier. A fast decoupled load flow algorithm was used to solve this problem, and a proposed topology-based method was used to identify the solvability of the bus-type extended load flow. Numerical tests with various cases had been done to verify the solvability judgment.

关 键 词：电力系统 潮流 节点类型 状态估计 可观测性 

分 类 号：TM74[电气工程—电力系统及自动化]