AC-(LCC)DC系统的全电磁暂态数值计算方法二:算法及算例  

Numerical Algorithm of Full Electromagnetic Transient Simulation for AC-(LCC)DC Hybrid Power Grids Part 2——Algorithms and Examples

作　　者：李默 汪芳宗[1] 宋新立 汤涌 LI Mo;WANG Fangzong;SONG Xinli;TANG Yong(College of Electrical Engineering&New Energy,China Three Gorges University,Yichang 443002,Hubei Province,China;China Electric Power Research Institute,Haidian District,Beijing 100192,China)

机构地区：[1]三峡大学电气与新能源学院,湖北省宜昌市443002 [2]中国电力科学研究院有限公司,北京市海淀区100192

出　　处：《电网技术》2022年第10期4056-4063,共8页Power System Technology

基　　金：国家电网有限公司科技项目(XTB51201802842)。

摘　　要：将Kahan方法应用于电磁暂态计算,提出了同步求解AC系统与电网换相换流器型高压直流输电(line commutated converter based high voltage direct current,LCC-HVDC)系统的全电磁暂态数值计算方法,该方法在每一步的积分中无需迭代,而且可以实现高度的空间解耦计算。将直流控制系统的仿真计算与主设备的电磁暂态计算分开处理,对极控制层包含的相关控制系统采用解析法进行求解;对阀控制层涉及的锁相振荡控制器采用Kahan方法进行积分求解。采用一个简单的AC/DC算例系统,将基于该文所提方法的电磁暂态计算结果与PSCAD/EMTDC仿真结果进行了比较,验证了所提方法的正确性与有效性。By using the Kahan method,a simultaneous solution for the full electromagnetic transient simulation of the AC-(LCC)DC hybrid power grids is proposed in this paper.The proposed method can achieve a high degree of spatial decoupling calculation without any iteration in the integration in each step.The simulation of the DC control systems is conducted separately from the electromagnetic transient simulation of the main HVDC equipment:The related control systems contained in the pole control layer are simulated by using analytical method;The phase-locked oscillation controller involved in the valve control layer is calculated via numerical integration by using the Kahan method.In a simple AC/DC example system,the electromagnetic transient simulation results based on the proposed method are compared with those of the PSCAD/EMTDC simulation to verify the validity and efficiency of the proposed method.

关 键 词：Kahan方法 同步求解 解耦计算 线性微分方程 显式解 

分 类 号：TM721[电气工程—电力系统及自动化]