一种改进型的交直流混合系统潮流计算方法  

A Modified Power Flow Calculation Method of AC/DC Hybrid System

作　　者：李小腾 梁航 徐静 赵进全[2] 金吉良 LI Xiaoteng;LIANG Hang;XU Jing;ZHAO Jinquan;JIN Jiliang(Electric Power Research Institute of State Grid Shaanxi Electric Power Corporation,Xi'an,Shaanxi 710010,China;College of Electrical Engineering,Xi'an Jiaotong University,Xi'an,Shaanxi 710049,China)

机构地区：[1]国网陕西省电力公司电力科学研究院,陕西西安710010 [2]西安交通大学电气工程学院,陕西西安710049

出　　处：《山西电力》2021年第3期1-5,共5页Shanxi Electric Power

基　　金：国网陕西省电力公司电力科学研究院-西安交通大学合作科研项目(B626KY190008)。

摘　　要：交直流混合系统潮流计算方法是电力系统的研究热点之一,针对交直流混合系统潮流计算中存在的计算效率低、收敛性较差等问题,提出了一种改进型的交直流混合系统潮流计算方法。该方法根据电路原理和系统结构,建立交直流系统的潮流计算模型,结合潮流方程的非线性及复杂性等特点,使用相对简单的交替迭代方程求解方法,引入具有重启动功能的广义最小残差法,解决了交替迭代计算中修正方程的计算量大、存储量大及收敛性较差的问题;针对矩阵的条件数和特征值影响计算的收敛性,引入矩阵预处理技术,提高了计算的收敛性;通过实例计算结果验证了方法的正确性,为交直流混合系统的潮流计算提出了一种有效的方法。The power flow calculation method of AC/DC hybrid system is one of the hot research issues of power system.In order to solve the problems of low efficiency and poor convergence of AC/DC hybrid system power flow calculation methods,a modified power flow calculation method of AC/DC hybrid system is put forward.Based on circuit principle and system structure,combined with the characteristics of nonlinearity and complexity of power flow equations,this method firstly establishes the power flow calculation model of the AC/DC hybrid system,and then uses the relatively simple alternate iterative method to solve the power flow equations.Generalized minimum residual method with restart function is also introduced to solve the problems of large amount of computation,large storage capacity and poor convergence of modifying the equation in the alternate iterative calculation.At the same time,considering the influence of the condition number and eigenvalue of the matrix on the calculation convergence,the matrix preprocessing technology is introduced to further improve the convergence of the calculation.Finally,an example is used to verify the correctness of this method,and thus an effective method is proposed for power flow calculation of AC/DC hybrid system.

关 键 词：交直流混合系统 潮流计算 交替迭代法 广义最小残差法 预处理技术 

分 类 号：TM711[电气工程—电力系统及自动化]