AC fault ride through control strategy on inverter side of hybrid HVDC transmission systems

• 作者: Dingxiang DU Guosheng YANG Liangliang HAO Xingguo WANG Yizhen WANG Zexin ZHOU Zhengguang CHEN
• 来源期刊: 现代电力系统与清洁能源学报(英文)
• 学科: 工学
• 关键词: HYBRID HVDC transmission FAULT CROSSING Control strategy INVERTER SIDE
• 年，卷（期）: 2019,（5）
• 页码范围: 1129-1141
• 页数: 13页
• 分类号: TM721.1

摘要

Hybrid high-voltage direct current(HVDC)transmission systems employ a new type of HVDC transmission topology that combines the advantages of the linecommutated converter system and the voltage-source converter system.They can improve the efficiency and reliability of long-distance power transmission.However,realizing alternating-current(AC)grid-fault ride through on the inverter side of a hybrid HVDC transmission system is a challenge considering that a voltage-source converter based HVDC(VSC-HVDC)is used on the inverter side.In this study,a control strategy for an overvoltage fixed trigger angle based on the power-balance method is developed by fully utilizing the operation characteristics of a hybrid HVDC transmission system.The strategy reduces the inverter-side overvoltage of the HVDC system under a fault in the inverter-side AC system.Simulations based on Gezhou Dam are conducted to validate the effectiveness of the proposed strategy.