摘要
为解决传统牵引网中存在的负序、无功、谐波等电能质量问题,在采用模块化多电平换流器结构的铁路功率调节器(modular multilevel converter-railway static power conditioner,MMC-RPC)基础上,提出一种基于滑模变结构的直接功率控制策略(sliding mode variable structure-direct power control,SMVS-DPC)。该控制策略不仅无需锁相环,动态响应快,而且能够减小切换滑模面时产生的高频抖振,稳定性和鲁棒性优越。首先建立单相MMC-RPC数学模型,分析其工作原理;其次详细论述SMVS-DPC控制策略的原理及其设计过程;最后以V/v变压器为例,在Matlab/Simuink中搭建MMC-RPC仿真模型,通过仿真结果验证SMVS-DPC控制策略运用到MMC-RPC的有效性和优越性。
In order to solve the problems of negative sequence,reactive power,harmonics and other power quality in traditional traction network,a sliding mode variable structure based direct power control strategy also named sliding mode variable structure-direct power control(SMVS-DPC)was proposed based on the modular multi-level converter structure of railway static power conditioner modular multilevel converter-railway static power conditioner(MMC-RPC).The control strategy not only does not need PLL and has fast dynamic response,but also can reduce the high frequency chattering caused by switching sliding surface,and has superior stability and robustness.Firstly,the single-phase MMC-RPC mathematical model was established and its working principle was analyzed.Secondly,the principle and design process of SMVS-DPC control strategy were discussed in details.Finally,taking V/v transformer as an example,the MMC-RPC simulation model was built in Matlab/Simuink.The simulation results verify the effectiveness and superiority of the SMVS-DPC control strategy applied to MMC-RPC.
作者
宋平岗
龙日起
杨长榄
雷文琪
SONG Ping-gang;LONG Ri-qi;YANG Chang-lan;LEI Wen-qi(College of Electrical and Automation Engineering,East China Jiaotong University,Nanchang 330013,China)
出处
《科学技术与工程》
北大核心
2020年第14期5790-5797,共8页
Science Technology and Engineering
基金
国家自然科学基金(51367008)。
