南方电网技术2024，Vol.18Issue(7)：46-54,9.DOI:10.13648/j.cnki.issn1674-0629.2024.07.006
半隐式延迟解耦的开关动作高效处理方法
Efficient Processing Method of Switching Actions with Semi-Implicit Delay Decoupling
摘要
Abstract
Traditional electromagnetic transient simulations use a detailed model to model the voltage source converter(VSC)and use the double interpolation method(DIM)to handle switching events within a step.Due to the time-varying conductor array of the detailed model and the complex DIM algorithm process,the computational efficiency is seriously affected when performing large grid simulations.To address this issue,the semi-implicit delay decoupling principle is applied to model VSC and the handling of switch-ing events within a step is investigated to improve the simulation efficiency by equating the duty cycle of the switching function within a step instead of DIM.Firstly,starting from the state equation of VSC,the decoupling model of VSC is obtained to realise the parallel computation of the converter and improve the computational efficiency.Secondly,the mechanism for generating the ac-cumulated error when switching events are not processed is analyzed,and the computational time scale and the calculation of the equivalent duty cycle of the switching function is also given to ensure the simulation accuracy.Finally,the accuracy and effective-ness of the proposed method are verified by the simulation waveforms of PSCAD as a benchmark,and the methodological features of the proposed method are discussed.关键词
电压源型换流器/半隐式延时解耦/电磁暂态仿真/开关动作处理/并行计算Key words
voltage source converter/semi-implicit delay decoupling/electromagnetic transient simulation/switching action processing/parallel computing分类
动力与电气工程引用本文复制引用
吴小珊,赵利刚,苏寅生,姚海成,范昕冉..半隐式延迟解耦的开关动作高效处理方法[J].南方电网技术,2024,18(7):46-54,9.基金项目
国家重点研发计划资助项目(2021YFB2400500) （2021YFB2400500）
中国南方电网有限责任公司科技项目(ZBKJXM20232431).Supported by the National Key Research and Development Program of China(2021YFB2400500) （ZBKJXM20232431）
the Science and Technology Project of China Southern Power Grid Co.,Ltd.(ZBKJXM20232431). （ZBKJXM20232431）
