摘要
结合CLLC谐振变换器和电力电子变压器(PET)技术,提出一种基于级联型PET的光储并网系统结构。该结构与传统光储并网系统结构相比,无需模块电容间的电压均衡控制,消除公共直流电容存在的二次功率波动,并保证三相相间功率平衡。对系统拓扑结构及工作原理进行详细描述,并在此基础上,提出一种功率分层协调控制策略,简化控制系统。通过设计并搭建1 MW/10 kV光储并网仿真系统,验证所提出系统结构和控制策略的可行性和有效性。
Combining CLLC resonant converter and power electronic transformer(PET)technology,an optical storage grid connected system structure based on cascaded pet is proposed.Compared with the traditional optical storage grid-connected system structure,this structure does not require voltage balance control between module capacitors,eliminates the secondary power fluctuations existing in public DC capacitors,and ensures the power balance between three phases.This article describes the system topology and working principle in detail,and on this basis,proposes a power hierarchical coordinated control strategy,which simplifies the control system.By designing and building a 1 MW/10 kV optical storage grid-connected simulation system,the feasibility and effectiveness of the system structure and control strategy are verified.
作者
宣丽萍
闫姝含
张亚坤
XUAN Liping;YAN Shuhan;ZHANG Yakun(School of Data Science and Engineering,South China Normal University,Shanwei 516600,China;School of Electrical&Control Engineering,Heilongjiang University of Science&Technology,Harbin 150028,China)
出处
《黑龙江电力》
CAS
2021年第4期290-296,共7页
Heilongjiang Electric Power
基金
中国煤炭工业协会科学技术研究指导性计划项目(项目编号:201404)。
关键词
电力电子变压器
光储并网系统
混合储能系统
协调控制策略
power electronic transformer(PET)
optical storage grid connected system
hybrid energy storage system
coordinate control strategy
