基于模块化级联拓扑的高压直流直挂储能装置  

HVDC direct-mounted energy storage device based on modular cascaded topology

作　　者：姚宏洋 谢晔源[1] 王翀[1] 任铁强 祁琦[1] 马秀达 YAO Hongyang;XIE Yeyuan;WANG Chong;REN Tieqiang;QI Qi;MA Xiuda(NR Electric Co.,Ltd.,Nanjing 211102,China)

机构地区：[1]南京南瑞继保电气有限公司,江苏南京211102

出　　处：《电力自动化设备》2024年第3期9-14,21,共7页Electric Power Automation Equipment

基　　金：国家电网有限公司总部科技项目(5200-202256078A-1-1-ZN)。

摘　　要：为了提升柔性直流输电的有功功率调节能力及惯量支持能力,研究了基于模块化级联拓扑的高压直流直挂储能技术,探索了高压直流直挂储能的工程化实施方案、控制系统架构及控制策略,提出了基于子模块电池荷电状态排序的改进型最近电平逼近调制策略,用于解决电池荷电状态及子模块开关频率整体均衡的问题。给出了高压直流直挂储能关键参数的计算方法。研制了基于磷酸铁锂电池的高压直流直挂储能模块及控制系统样机,搭建了含高压直流直挂储能的柔性直流输电系统的电磁暂态仿真模型和基于串联变流器的试验平台,通过系统仿真及样机试验验证所提高压直流直挂储能方案的可行性。In order to improve the active power regulation ability and inertia support ability of flexible di⁃rect current(DC)transmission,the technology of high voltage direct current(HVDC)direct-mounted energy storage based on modular cascaded topology is studied,the engineering implementation scheme,control sys⁃tem architecture and control strategy of HVDC direct-mounted energy storage are explored,and an improved nearest level modulation(NLM)strategy based on the state of charge(SOC)sequencing of sub-module bat⁃teries is proposed,to solve the overall balance problems of batteries’SOC and sub-module switching fre⁃quency.The calculation method of key parameters of HVDC direct-mounted energy storage is given.The HVDC direct-mounted energy storage module and control system prototype based on lithium iron phosphate batteries are developed,and an electromagnetic transient simulation model of a flexible DC transmission system with HVDC direct-mounted energy storage and a series converter-based experiment platform are estab⁃lished.The feasibility of the proposed HVDC direct-mounted energy storage scheme is verified through system simulation and prototype experiment.

关 键 词：柔性直流输电 模块化级联拓扑 高压直流直挂储能 最近电平逼近调制 荷电状态 

分 类 号：TM46[电气工程—电器]