Transient Voltage Support Strategy of Grid-Forming Medium Voltage Photovoltaic Converter in the LCC-HVDC System

Hong Lu; Xianyong Xiao; Guangfu Tang; Zhiyuan He; Zhiguang Lin; Chong Gao; Zixuan Zheng

doi:10.17775/CSEEJPES.2024.00600

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Transient Voltage Support Strategy of Grid-Forming Medium Voltage Photovoltaic Converter in the LCC-HVDC System

Regular Papers | 更新时间：2026-10-15

- Transient Voltage Support Strategy of Grid-Forming Medium Voltage Photovoltaic Converter in the LCC-HVDC System
- Transient Voltage Support Strategy of Grid-Forming Medium Voltage Photovoltaic Converter in the LCC-HVDC System
- 中国电机工程学会电力与能源系统学报(英文) 2024年10卷第5期页码：1849-1864
- 作者机构：
  
  1. College of Electrical Engineering, Sichuan University,Chengdu,China
  2. State Key Lab of Advance Power Transmission Technology, China Electric Power Research Institute,Beijing,China
- 作者简介：
- 基金信息：
- DOI：10.17775/CSEEJPES.2024.00600
  中图分类号：
- 纸质出版：2024-09-01
- 稿件说明：
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Hong Lu, Xianyong Xiao, Guangfu Tang, 等. Transient Voltage Support Strategy of Grid-Forming Medium Voltage Photovoltaic Converter in the LCC-HVDC System[J]. 中国电机工程学会电力与能源系统学报(英文), 2024,10(5):1849-1864.

Hong Lu, Xianyong Xiao, Guangfu Tang, et al. Transient Voltage Support Strategy of Grid-Forming Medium Voltage Photovoltaic Converter in the LCC-HVDC System[J]. CSEE Journal of Power and Energy Systems, 2024, 10(5): 1849-1864.
Hong Lu, Xianyong Xiao, Guangfu Tang, 等. Transient Voltage Support Strategy of Grid-Forming Medium Voltage Photovoltaic Converter in the LCC-HVDC System[J]. 中国电机工程学会电力与能源系统学报(英文), 2024,10(5):1849-1864. DOI： 10.17775/CSEEJPES.2024.00600.

Hong Lu, Xianyong Xiao, Guangfu Tang, et al. Transient Voltage Support Strategy of Grid-Forming Medium Voltage Photovoltaic Converter in the LCC-HVDC System[J]. CSEE Journal of Power and Energy Systems, 2024, 10(5): 1849-1864. DOI： 10.17775/CSEEJPES.2024.00600.

摘要

Abstract

The participation of photovoltaic (PV) plants in supporting the transient voltage caused by commutation failure in the line-commutated-converter-based high voltage direct current (LCC-HVDC) system is of great significance

as it can enhance the DC transmission ability. However

it is found that the grid-following (GFL) PV converters face the problem of mismatch between reactive power response and transient voltage characteristic when the voltage converts from low voltage to overvoltage

further aggravating the overvoltage amplitude. Thus

this article proposes a transient voltage support strategy based on the grid-forming (GFM) medium voltage PV converter. The proposed strategy takes the advantage of the close equivalent electrical distance between the converter and grid

which can autonomously control the converter terminal voltage through GFM control with adaptive voltage droop coefficient. The simulation results show that the proposed strategy can ensure the output reactive power of the PV converter quickly matches the transient voltage characteristic at different stages

indicating that the proposed strategy can effectively support the transient voltage.

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