具有2.414阶收敛速率的VSC-HVDC系统改进潮流算法  

Improved Power Flow Algorithm for VSC-HVDC System with 2.414-order Convergence Rate

作　　者：李乾坤 韦延方[1] 王晓卫[1,2] 郑征[1] 曾志辉[1] 杨明[1] LI Qiankun;WEI Yanfang;WANG Xiaowei;ZHENG Zheng;ZENG Zhihui;YANG Ming(School of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo 454000,China;School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]河南理工大学电气工程与自动化学院,焦作454000 [2]西安交通大学电气工程学院,西安710049

出　　处：《电力系统及其自动化学报》2020年第5期38-46,共9页Proceedings of the CSU-EPSA

基　　金：国家自然科学基金资助项目(61703144,61403127,U1804143);河南省矿山电力电子装置与控制创新型科技团队资助项目(CXTD2017085)。

摘　　要：相比传统高压直流输电HVDC(high voltage direct arrent),基于电压源换流器的高压直流输电VSC-HVDC(voltage source converter based HVDC)具有较多独特优势,是智能电网发展具有代表性的关键技术之一。首先,基于VSC-HVDC稳态模型的标幺制处理分析了VSC-HVDC的稳态方程,并给出了适用于求解含VSC-HVDC的交直流系统潮流的统一法迭代形式;进而,通过计算预估值和校正值2个步骤,利用具有2.414阶次收敛速率的改进牛顿-拉夫逊法修正交直流系统的雅可比矩阵,以节省程序迭代过程中的数据存储空间,加快程序执行调用的速度,从而提高雅可比矩阵的计算速率。最后,基于修改后的IEEE标准算例,从交直流潮流结果、控制方式、算法效率等方面的对比分析,验证了该方法求解含VSC-HVDC的交直流系统潮流的有效性和正确性。Compared with the traditional high voltage direct current(HVDC),voltage source converter based HVDC(VSC-HVDC)has many unique advantages,and it is one of the key technologies for the development of smart grid.First,based on the standard processing of a VSC-HVDC steady-state model,the steady-state equation of VSC-HVDC is analyzed,and the unified iterative form suitable for solving the power flow in the AC/DC system with VSC-HVDC is presented. Then,by using the improved Newton-Raphson method with 2.414-order convergence rate,the Jacobian matrix of the AC/DC system is corrected through calculating the estimated and correction values. This algorithm can save the data storage space in the process of program iterations and speed up the execution and invocation of the program. As a result,the computing speed of Jacobian matrix is improved. At last,based on several modified IEEE standard examples,the validity and correctness of the proposed algorithm for solving the power flow in the AC/DC system with VSCHVDC are verified by comparisons and analyses from aspects such as AC/DC power flow result,control mode,and algorithm efficiency.

关 键 词：电压源换流器 高压直流输电(HVDC) 改进牛顿-拉夫逊法 交直流系统 潮流计算 

分 类 号：TM715[电气工程—电力系统及自动化]