- 专利标题： METHOD AND APPARATUS FOR HANDLING DIRECT-CURRENT SIDE LINE FAULT OF VOLTAGE SOURCE CONVERTER
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申请号： EP22749146.1申请日： 2022-01-29
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公开(公告)号： EP4290721A1公开(公告)日： 2023-12-13
- 发明人: LU, Jiang , DONG, Yunlong , YU, Xiang , YANG, Jianming , WANG, Yangzheng , LU, Yu , TIAN, Jie , LI, Haiying , QIU, Defeng , HUANG, Ruhai
- 申请人： NR ELECTRIC CO., LTD. , NR Engineering Co., Ltd.
- 申请人地址： CN Jiangning Nanjing, Jiangsu 211102 No.69 Suyuan Avenue; CN Nanjing, Jiangsu 211102 No. 69 Suyuan Avenue Jiangning
- 代理机构： Cabinet Bleger-Rhein-Poupon
- 优先权： CN202110172033 20210208
- 国际公布： WO2022166867 20220811
- 主分类号： H02H7/26
- IPC分类号： H02H7/26 ; H02J3/36
摘要：
The invention provide a method and device for handling a DC-side line fault of a voltage source converter, wherein the voltage source converter is arranged at a rectifier end or an inverter end of any DC pole of a DC transmission system, and the rectifier end and the inverter end are connected through a DC line. The fault handling method comprises: acquiring a normal value of a DC voltage reference value of the voltage source converter; setting a DC current limiting target value of the voltage source converter; acquiring a DC current limiting control output value based on a DC current measured value and the DC current limiting target value; setting a DC voltage reference value of the voltage source converter based on the normal value of the DC voltage reference value and the DC current limiting control output value; setting the DC current limiting target value to be zero when a DC side line fault is detected; and rising the DC voltage reference value of the voltage source converter in response to end of de-ionization, and changing the DC current limit target value of the voltage source converter.
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