Forced Turn off Technology Applied to Static Transfer Switch in Microgrid

doi:10.16628/j.cnki.2095-8188.2024.12.003

Abstract

Abstract:

In order to solve the problem that the static transfer switch of the thyristor in the microgrid is hard to shut off,a kind of forced turn off method combined with the energy storage converter in the microgrid is proposed and the mathematical model of the method is also given.The topology characteristics in the structure of energy storage converter are used to apply the reverse voltage to the thyristor during the operation of changing mode of grid connected to isolated network.The thyristor current is dropped to zero to complete the forced turn off.By analyzing the mathematical model of the proposed method,the main factors affecting the forced turn off technology are revealed.In order to solve the application problems in practical engineering,the forced turn off control process in practical application is also given.Finally,the correctness of the proposed method is verified by the simulation analysis and the test.

Key words: static transfer switch, power conversion system, rectifier, microgrid

CLC Number:

TM46

WANG Weian, QIAO Daoji. Forced Turn off Technology Applied to Static Transfer Switch in Microgrid[J]. LOW VOLTAGE APPARATUS, 2024, 0(12): 15-20.

Figures/Tables 10

References 16

[1]	张纯江, 徐菁远, 庆宏阳, 等. 主从结构微电网逆变器离网全过程平滑切换控制策略[J]. 电力系统自动化, 2022, 46(23):125-133.
[2]	刘晓明, 胡丽娟, 赵凤展, 等. 微电网运行控制关键技术评价[J]. 电器与能效管理技术, 2024(5):1-9.
[3]	尚扬, 王永生, 魏超, 等. 三电平变流器内外管电压不平衡分析[J]. 电器与能效管理技术, 2023(5):25-29.
[4]	秦铮, 张国钢, 刘竞存, 等. 混合式直流断路器工况下IGBT过流特性的试验研究[J]. 电器与能效管理技术, 2019(7):6-11.
[5]	冯兴田, 韦统振, 齐智平. 电压质量调节器中晶闸管的强制关断技术[J]. 电力自动化设备, 2012, 32(4):35-39.
[6]	李振宇. 储能型动态电压恢复器运行与控制优化关键技术研究[D]. 杭州: 浙江大学, 2023.
[7]	冯兴田, 马文忠, 董磊. 晶闸管强制关断技术分析系统的实验平台设计[J]. 实验室科学, 2017, 20(1):33-36.
[8]	温家良, 傅鹏, 刘正之, 等. EAST托卡马克大功率双向直流快速晶闸管开关可靠关断理论分析及参数优化设计[J]. 中国电机工程学报, 2005, 25(14):62-67.
[9]	张茂林, 肖辉, 曾林俊, 等. 计及储能损耗和功率预测误差的风光储微电网功率平抑策略[J]. 电器与能效管理技术, 2022(5):47-54.
[10]	王杰锋, 唐炳南, 和晓华, 等. 主从型微电网并离网模式切换及其稳定控制[J]. 电力电子技术, 2024, 58(4):100-104.
[11]	刘景霞, 王硕秋. 微电网并离网平滑切换控制策略研究[J]. 电工技术, 2023(2):29-31,35.
[12]	王力, 徐珂, 宋来森, 等. 中点电压主动控制的三电平逆变器非连续PWM调制[J]. 电器与能效管理技术, 2019(1):46-54.
[13]	侯灵犀, 徐琳, 魏应冬, 等. 适于微电网可控开关无缝切换的无源网络优化设计[J]. 电力系统自动化, 2018, 42(7):171-177.
[14]	李进伟, 李堂, 毛行奎, 等. I型三电平储能变流器设计[J]. 电器与能效管理技术, 2024(4):38-44.
[15]	陈强. 三电平储能变流器的研制[J]. 电力电子技术, 2021, 55(3):122-124.
[16]	肖珩, 李建林, 李雅欣, 等. 电化学储能电站NPC三电平变流器仿真建模研究[J]. 太阳能学报, 2022, 43(5):438-445. doi: 10.19912/j.0254-0096.tynxb.2022-0146