中国电机工程学报2024，Vol.44Issue(19)：7739-7750,中插21,13.DOI:10.13334/j.0258-8013.pcsee.231284
基于MMC平均值仿真模型的损耗快速评估方法
Fast Loss Evaluation Method Based on MMC Average Simulation Model
摘要
Abstract
To address the problem that the calculation accuracy and speed of MMC losses are difficult to balance,a fast online evaluation method of losses is proposed.First,based on the determined modulation and capacitor voltage balance strategy,the switching frequency surface is constructed to reflect the switching frequency under any steady-state working condition.Next,the upper limit of switching frequency and the upper limit of switching losses are calculated by using the average value model.Once again,combined with the calculation results and the switching frequency surface,the rapid calculation of the actual losses is realized with high accuracy.Then,considering the impact of losses on the simulation results,the energy absorbed by a controlled voltage source connected in series on the bridge arm is used to characterize the losses.A switching loss injection method based on attenuation function is proposed to avoid injection voltage spikes and improve injection efficiency.Finally,an MMC average simulation model considering loss injection is built in PSCAD to verify the computational efficiency and accuracy of the proposed method.关键词
模块化多电平换流器/损耗计算/平均值模型/损耗注入Key words
modular multilevel converter(MMC)/power loss calculation/average value model/loss injection分类
信息技术与安全科学引用本文复制引用
孙正东,郝全睿..基于MMC平均值仿真模型的损耗快速评估方法[J].中国电机工程学报,2024,44(19):7739-7750,中插21,13.基金项目
国家电网有限公司科技项目(5108-202299261A-1-0-ZB). Science and Technology Project of State Grid Corporation of China(5108-202299261A-1-0-ZB). （5108-202299261A-1-0-ZB）
