Work

Fault Characteristic Analysis and Countermeasure Research for Novel CLCC DC System

Year: 2025

Type: article

Abstract: With the development of high-voltage direct current (HVDC) transmission, commutation failures (CFs) in line commutated converters (LCC) become increasingly prominent. A controllable line commutated converter (CLCC) is proposed to effectively solve commutation failures in LCC. Forced commutation is achieved in CLCC by incorporating auxiliary branches. However, the added components introduce the risks such as open-circuit or short-circuit failures, impacting the reliability of converter. This paper analyzes the fault characteristics of key components in both the main and auxiliary branches of the CLCC, with focus on open-circuit and short-circuit faults. A fault location method based on fault voltage and current is then proposed. Finally, the fault characteristic analysis and the proposed location method are validated by simulation on the developed 500kV/1.2kA CLCC-HVDC model in PSCAD/EMTDC. The result shows that the proposed method enables accurate identification of the faulty valve location.

Source: IEEE Transactions on Industry Applications

DOI: 10.1109/tia.2025.3579468

Authors: Wenyi Xu, Jianjun Ma, Dezhen Zhang, Zhe Chen, Miao Zhu

Institutions: Shanghai University of Electric Power, Shanghai Jiao Tong University, Shanghai Electric (China), State Grid Shanghai Municipal Electric Power Company (China)

Language: English

Topic: HVDC Systems and Fault Protection

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Industry, innovation and infrastructure, Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $2,645