摘要
为提高传统一步延时解耦模型的仿真精度,提出了一种电力电子换流器无延时解耦并行仿真模型.在预测步骤中,采用3/2步长预测解耦接口状态量;在校正步骤中,采用中矩形积分,对系统状态矩阵非对角的变导纳部分和状态量乘积矩阵进行离散化处理,构造出具有1/2时延的解耦形式,推导出无延时解耦并行仿真模型,并将其数值稳定域与传统一步延时解耦模型进行对比分析.最后,通过仿真和搭建物理实验样机来验证所提模型.结果表明:所提模型具有恒导纳、高精度和并行度的特点,大步长仿真结果与参考模型的最大相对误差低于5%,FPGA板卡上硬件资源LUTs、DSPs占比分别为8.2%和6.5%,可以实现280 ns步长的实时仿真.
To improve the precision of the traditional one-step delayed decoupling model,a parallel simulation model for power electronic converters without delayed decoupling is proposed.In the prediction step,a 3/2 step is employed to predict the decoupling interface state quantities.In the correction step,the middle rectangle integral is utilized to discretize the non-diagonal variable derivative part of the system state matrix and the state quantity product matrix.A decoupling form with a 1/2 time-delay is constructed,and the parallel simulation model of the no-delay decoupling is derived.The numerical stability domains of the proposed model are analyzed and compared with those of the traditional one-step time-delay decoupling model.Finally,the proposed model is verified by means of simulation and physical experiment prototype.The results demonstrate that the proposed model exhibits the characteristics of constant conductivity,high accuracy and parallelism.The maximum relative error between the simulation results of the proposed model and those of the reference model is less than 5%at a large simulation time-step.The proportions of the hardware resources occupied by the look-up tables(LUTs)and digital signal processors(DSPs)on the field-programmable gate array(FPGA)board are 8.2%and 6.5%,respectively.The real-time simulation with a 280 ns simulation time-step can be achieved.
作者
许明旺
顾伟
陈帅先
曹阳
章飞
柳伟
Xu Mingwang;Gu Wei;Chen Shuaixian;Cao Yang;Zhang Fei;Liu Wei(School of Electrical Engineering,Southeast University,Nanjing 210096,China;School of Automation,Nanjing University of Science and Technology,Nanjing 210094,China)
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2024年第5期1314-1321,共8页
Journal of Southeast University：Natural Science Edition
基金
国家杰出青年基金资助项目(52325703)
江苏省碳达峰碳中和科技创新专项资金(产业前瞻与关键核心技术攻关)资助项目(BE2023093-3).
关键词
电磁暂态仿真
电力电子换流器
预测校正
无延时解耦
并行仿真
electromagnetic transient simulation
power electronic converter
prediction-correction
no timedelay decoupling
parallel simulation
作者简介
许明旺(1996-),男,博士生;联系人:顾伟,男,博士,教授,博士生导师,wgu@seu.edu.cn.
