高压直流输电系统暂态过程的解析解法(二):算法与算例  

An Analytical Solution for Transient Process of HVDC Transmission System Part 2-Algorithm and Example

作　　者：李崇涛[1] 林啸[1] 赵勇 赵利刚 杜正春[1] 夏道止[1] 

机构地区：[1]西安交通大学电气工程学院,陕西省西安市710049 [2]南方电网科学研究院,广东省广州市510080

出　　处：《电网技术》2017年第1期8-13,共6页Power System Technology

基　　金：国家自然科学基金项目(51507127)~~

摘　　要：对高压直流(HVDC)输电系统的暂态过程提出了一种新的精确计算方法。将直流系统主设备与控制系统分开计算,其中将主设备部分描述成分时段的齐次线性微分方程组,采用解析方法进行求解;对包含非线性环节的控制系统采用变步长的数值积分方法,将二者结合即可得到精确时域响应。采用解析解法代替数值积分方法计算HVDC系统主设备中的暂态过程,使得计算过程不再受小的积分步长限制,且不存在截断误差与数值稳定性问题。通过一个典型的算例将解析解法的结果与PSCAD/EMTDC仿真结果进行了比较,说明了所提方法的正确性与有效性。An accurate calculation method for transient process of HVDC transmission system was proposed in this paper. Calculation for main HVDC equipment and control system were conducted separately. Main equipment was described in piecewise homogeneous linear differential equations with solutions obtained with analytical method. Control system containing non-linear courses was calculated with a step-changed integration method. Accurate time-domain response was obtained by combining the two methods. By using analytic solution instead of numerical integration method for transient process in main HVDC equipment, calculation process is no longer be limited by small step length, and has no truncation errors and numerical stability problem. A typical example was presented and analytical solution results were compared with PSCAD/EMTDC simulation results to verify validity and efficiency of the proposed method.

关 键 词：高压直流输电 解析表达式 换相失败 变步长积分 电磁暂态仿真 

分 类 号：TM72[电气工程—电力系统及自动化]