改进移相控制下PMSG-PET系统回流功率的优化
Optimization of return power of PMSG-PET system in control of improved phase shift
谢子殿 1陈令猛 1焦文良1
作者信息
- 1. 黑龙江科技大学 电气与控制工程学院,哈尔滨 150022
- 折叠
摘要
针对电力电子变压器作为风电系统并网接口系统存在回流功率的问题,通过优化电力电子变压器的控制方法,改进传统的双重移相控制方法,在传统双重移相控制的基础上,改变移相比D1、D2,使二者的组合达到最优,能够降低系统中的回流功率,提高系统效率,在Matlab中对改进控制方法后的系统进行建模与仿真.结果表明,改进前输出功率最小值大约为-5 kW,将改进后的移相控制方法应用到PMSG-PET系统中,改进后输出功率最小值大约为-1.5 kW.该控制方法能够有效降低系统回流功率,证明了改进移相控制方法的有效性.
Abstract
This paper aims to address the problem of return power existing in grid-connected interface system of the wind power system caused by replacing the power electronic transformer into conventional transformer.The study involves optimizing the control measures of the power electronic transformer to im-prove the traditional double phase-shift control method;changing the shifting ratios of D1,D2 on the basis of traditional double phase-shift contrl,and achieving the best combination,which can reduce the return power in system and improve the efficiency of the system;and modeling and simulating the system of im-proved control measure in Matlab.The results show that the minimum value of the output power is about-5 kW before improvement,and the minimum value of the output power is about-1.5 kW after apply-ing the improved phase-shift control method to PMSG-PET system.The effective reduction of the system return power proves the effectiveness of the improved phase-shift control measures.
关键词
电力电子变压器/双重移相控制/回流功率/PMSG风力发电系统Key words
power electronic transformer/dual phase shift control/return power/PMSG wind power systems引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据