Research on the Power Coordinate Control Strategy between a CLCC-HVDC and a VSC-HVDC during the AC Fault Period

Jingbo Zhao (), Ke Xu and Wenbo Li
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Jingbo Zhao: State Grid Jiangsu Electric Power Co., Ltd. Research Institute, Nanjing 211103, China
Ke Xu: State Grid Jiangsu Electric Power Co., Ltd. Research Institute, Nanjing 211103, China
Wenbo Li: State Grid Jiangsu Electric Power Co., Ltd. Research Institute, Nanjing 211103, China

Energies, 2024, vol. 17, issue 17, 1-16

Abstract: The underlying cause of commutation failures in traditional line-commutated converter (LCC) high-voltage direct-current (HVDC) transmission technology lies in the sensitivity of the thyristor devices, which are prone to turning off, thereby restoring the forward circuit breaker capability. This paper presents a coordination strategy between a controllable line-commutated converter (CLCC) and a voltage-sourced converter (VSC) and delves into the fault characteristics specific to CLCC damage. Our research focuses on CLCC topology, where fully controlled devices are incorporated to manage the thyristor’s turn-off time, ensuring its successful deactivation. This approach serves as a fundamental preventative measure against commutation faults. Furthermore, we employ a coordination strategy between the VSC and the CLCC to enhance the recovery time efficiency of the AC system. This strategy is simulated and validated using PSCAD software, and the results confirm its effectiveness in fault tolerance and AC system recovery.

Keywords: CLCC; HVDC; coordinate control (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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