MMC-based fault analysis and current-limiting control strategy for a photovoltaic DC boost grid-connected system

被引：0
|
作者：
Chen X. [1 ,2 ]
Zhang J. [1 ]
Ma Z. [1 ]
Zeng H. [1 ]
Jia Y. [1 ,2 ]
机构：
[1] School of Electrical and Electronic Engineering, Chongqing University of Technology, Chongqing
[2] Chongqing Engineering Research Center of Energy Internet, Chongqing
来源：
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2023年 / 51卷 / 22期
关键词：
bipolar short circuit; current limiting control; DC converter; MMC; photovoltaic;
D O I：
10.19783/j.cnki.pspc.230601
中图分类号：
学科分类号：
摘要：
A modular multilevel converter (MMC)-based PV DC boost grid-connection system provides more possibilities for large-capacity grid-connection. However, the transient process of the DC side fault of a PV boosting system is complicated, and the fault current rises rapidly and the peak value is too high. To address this problem, first, the fault process of a DC boost converter and MMC converter station in the case of a bipolar short-circuit fault on the DC side of the system is analyzed, and the fault current flowing through the short-circuit point under reliable blocking is calculated through the fault circuit. Then for the fault current of the MMC converter station, based on its control principle, an active current limiting control strategy based on voltage variation is proposed, one which dynamically changes the reference voltage of the bridge arm by introducing voltage variation to limit the fault current. Finally, the fault analysis results and current limiting effect are verified by a PSCAD simulation model, and it is verified that the control strategy can effectively reduce the opening current of the circuit breaker and the peak overcurrent of the bridge arm. © 2023 Power System Protection and Control Press. All rights reserved.
引用
收藏
页码：145 / 154
页数：9
相关论文
共 32 条
  • [1] XU Xiaoyuan, WANG Han, YAN Zheng, Et al., Overview of power system uncertainty and its solutions under energy transition, Automation of Electric Power Systems, 45, 16, pp. 2-13, (2021)
  • [2] JING Tao, CHEN Geng, WANG Zihao, Et al., Research overview on the integrated system of wind-solar hybrid power generation coupled with hydrogen-based energy storage, Electric Power, 55, 1, pp. 75-83, (2022)
  • [3] XIAO Yao, NIU Wenze, WEI Gaosheng, Et al., Review on research status and developing tendency of solar photovoltaic/thermal technology, Power Generation Technology, 43, 3, pp. 392-404, (2022)
  • [4] ZHU Yanming, XU Xiaoyuan, YAN Zheng, Et al., Prospect of renewable energy integrated distribution network operation in the power internet of things, Power System Protection and Control, 50, 2, pp. 176-187, (2022)
  • [5] ZHANG Xinyan, ZHAO Liwei, ZHAO Lifei, Et al., Contrasting analysis on multi-infeed VSC and AC grid-connection of new energy, High Voltage Engineering, 43, 4, pp. 1121-1128, (2017)
  • [6] HAN Wei, YANG Ruizhang, LIU Chao, Et al., DC fault characteristics and fault current suppression strategy of three-terminal hybrid HVDC system based on LCC and hybrid MMC, High Voltage Apparatus, 57, 6, pp. 179-188, (2021)
  • [7] TANG Xin, HUANG Sheng, PAN Yibin, Et al., C Active current limiting strategy of an MMC converter station based on AC side energy feedback under a DC fault, Power System Protection and Control, 51, 9, pp. 56-64, (2023)
  • [8] YANG Zhiyong, YANG Bingyuan, REN Yongfeng, Et al., Transmission line protection scheme of MMC-MTDC based on single terminal high frequency current, Power System Protection and Control, 50, 14, pp. 151-160, (2022)
  • [9] TANG Zhiyang, HU Jian, JIAO Ticao, Et al., Design of bidirectional DC-DC converter for DC microgrid interconnection, Power Capacitor & Reactive Power Compensation, 43, 5, pp. 148-155, (2022)
  • [10] QUAN Yue, WANG Zhiyuan, LI Binbin, Et al., A High-voltage large-capacity DC/DC converter integrated with the function of DC circuit breaker, Electric Power, 54, 10, pp. 46-54, (2021)
1234