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MMC-HVDC AC side Line Protection based on positive sequence Fault component current ratio
  • Hanqing Huang,
  • Zengping Wang
Hanqing Huang
North China Electric Power University

Corresponding Author:huanghanqing_hbdl@163.com

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Zengping Wang
North China Electric Power University State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources
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Abstract

The HVDC transmission based on modular multilevel converter shows the weak feed characteristic of limited fault current amplitude when connected to the traditional AC power grid, which leads to the risk of sensitivity reduction or even failure of the traditional pilot protection. In this paper, a MMC-HVDC AC side transmission line protection scheme based on positive sequence fault component current ratio is proposed. The positive sequence fault component current of the MMC-HVDC side is calculated by using the positive sequence fault component current of the power grid side, and the fault is identified through the significant difference between the ratio of the positive sequence fault component current of the MMC-HVDC side and the actual positive sequence fault component current of the MMC-HVDC side in the case of internal and external faults. This method has the advantages of simple principle, low requirement for synchronous data, not affected by capacitive current and strong resistance to high resistance. The simulation results show that the algorithm can correctly partition internal and external faults, and is not affected by fault location, fault type and operation mode of converter station, and has high sensitivity and reliability.
18 May 2023Submitted to IET Generation, Transmission & Distribution
18 May 2023Submission Checks Completed
18 May 2023Assigned to Editor
21 Jun 2023Reviewer(s) Assigned
26 Jul 2023Review(s) Completed, Editorial Evaluation Pending
03 Aug 2023Editorial Decision: Revise Major
08 Aug 20231st Revision Received
10 Aug 2023Submission Checks Completed
10 Aug 2023Assigned to Editor
10 Aug 2023Reviewer(s) Assigned
25 Aug 2023Review(s) Completed, Editorial Evaluation Pending
28 Aug 2023Editorial Decision: Accept