基于网络分割的分块牛顿法潮流计算  

Block Newton Method for Power Flow Calculation Based on Grid Partitioning

作　　者：孙闻[1] 房大中[2] 

机构地区：[1]广东电网公司电力科学研究院,广东广州510600 [2]天津大学电力系统仿真控制教育部重点实验室,天津300072

出　　处：《广东电力》2010年第6期1-5,共5页Guangdong Electric Power

基　　金：国家自然科学基金资助项目(50777046)

摘　　要：为了提高潮流计算的速度,解决传统潮流计算方法扩展性和灵活性不足、计算量大的问题,提出了一种基于网络分割的分块牛顿潮流计算新方法,其特点是通过选择联络线将电网划分为若干个规模较小的子网络,然后对各子网络分别建立潮流计算方程,通过线性变换、联立求解和回代计算等手段,将传统牛顿法中的高维线性方程组转化为多个低维线性方程组进行求解;该方法不改变传统牛顿法的计算精度和收敛性,易于并行实现。对测试系统的分析表明,该方法具有潜在的可并行优势,网络规模越大,优势越明显,并可有效地提高潮流计算的效率。In order to expedite power flow calculation and solve the problem of inadequate scalability and flexibility as well as massive computation in traditional power flow algorithm, a new block Newton method for power flow study based on grid partitioning is proposed. The characteristic of this method is that power grid is partitioned into several sub-networks by selecting interconnected links; the load flow equations for each sub-network are constituted individually. And then, a series of processes including linear transformation, simultaneous solution and back substitution are used to transform the high- dimension linear equation of entire electric network into several relatively low-dimension linear equations. This method is easy to be implemented in a parallel mode, but preserves the precision and convergence of traditional Newton load flow method. The study on the test power systems shows the potential parallel-computation advantage of the proposed method, and the larger the network, the more obvious the advantage. The new method effectively improves the efficiency of power flow calculation.

关 键 词：电力系统 潮流计算 网络分割 子网络 并行计算 

分 类 号：TM744[电气工程—电力系统及自动化]