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Energies 2017, 10(10), 1481; doi:10.3390/en10101481

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

1
School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China
2
State Grid Operation Company, Beijing 100052, China
3
State Key Laboratory of Power Grid Safety and Energy Conservation (China Electric Power Research Institute), Beijing 100192, China
4
State Power Economic Research Institute, Beijing 102209, China
5
NR Electric Co., Ltd., Nanjing 211102, China
6
Information Trust Institute, University of Illinois at Urbana-Champaign, Champaign, IL 61801, USA
*
Author to whom correspondence should be addressed.
Received: 20 July 2017 / Revised: 12 September 2017 / Accepted: 18 September 2017 / Published: 25 September 2017
View Full-Text   |   Download PDF [3774 KB, uploaded 25 September 2017]   |  

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. View Full-Text
Keywords: commutation failure prevention (CFPREV); high voltage direct current (HVDC); inrush current; harmonic detection; predictive control commutation failure prevention (CFPREV); high voltage direct current (HVDC); inrush current; harmonic detection; predictive control
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MDPI and ACS Style

Li, X.; Li, F.; Chen, S.; Li, Y.; Zou, Q.; Wu, Z.; Lin, S. An Improved Commutation Prediction Algorithm to Mitigate Commutation Failure in High Voltage Direct Current. Energies 2017, 10, 1481.

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