An Improved Commutation Prediction Algorithm to Mitigate Commutation Failure in High Voltage Direct Current

Xinnian Li, Fengqi Li, Shuyong Chen, Yanan Li, Qiang Zou, Ziping Wu and Shaobo Lin
Additional contact information
Xinnian Li: School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China
Fengqi Li: State Grid Operation Company, Beijing 100052, China
Shuyong Chen: State Key Laboratory of Power Grid Safety and Energy Conservation (China Electric Power Research Institute), Beijing 100192, China
Yanan Li: State Power Economic Research Institute, Beijing 102209, China
Qiang Zou: NR Electric Co., Ltd., Nanjing 211102, China
Ziping Wu: Information Trust Institute, University of Illinois at Urbana-Champaign, Champaign, IL 61801, USA
Shaobo Lin: State Key Laboratory of Power Grid Safety and Energy Conservation (China Electric Power Research Institute), Beijing 100192, China

Energies, 2017, vol. 10, issue 10, 1-16

Abstract: Commutation failure is a common fault for line-commutated converters in the inverter. To reduce the possibility of commutation failure, many prediction algorithms based on alternating current (AC) voltage detection have already been implemented in high voltage direct current (HVDC) control and protection systems. Nevertheless, there are currently no effective methods to prevent commutation failure due to transformer excitation surge current. In this paper, an improved commutation failure prediction algorithm based on the harmonic characteristics of the converter bus voltage during transformer charging is proposed. Meanwhile, a sliding-window iterative algorithm of discrete Fourier transformation (DFT) is developed for detecting the voltage harmonic in real time. This method is proved to be an effective solution, which prevents commutation failure in cases of excitation surge current, through experimental analysis. This method is already implemented into TianShan-ZhongZhou (TianZhong) ± 800 kV ultra high voltage direct current (UHVDC) system.

Keywords: commutation failure prevention (CFPREV); high voltage direct current (HVDC); inrush current; harmonic detection; predictive 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: 2017
References: View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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