Novel Detection Method for Consecutive DC Commutation Failure Based on Daubechies Wavelet with 2nd-Order Vanishing Moments

Tao Lin, Ziyu Guo, Liyong Wang, Rusi Chen and Ruyu Bi
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Tao Lin: School of Electrical Engineering, Wuhan University, Wuhan 430072, China
Ziyu Guo: School of Electrical Engineering, Wuhan University, Wuhan 430072, China
Liyong Wang: State Grid Beijing Electric Power Company, Beijing 100031, China
Rusi Chen: School of Electrical Engineering, Wuhan University, Wuhan 430072, China
Ruyu Bi: School of Electrical Engineering, Wuhan University, Wuhan 430072, China

Energies, 2018, vol. 11, issue 2, 1-16

Abstract: Accurate detection and effective control strategy of commutation failure (CF) of high voltage direct current (HVDC) are of great significance for keeping the safe and stable operations of the hybrid power grid. At first, a novel detection method for consecutive CF is proposed. Concretely, the 2nd and higher orders’ derivative values of direct current are summarized as the core to judge CF by analyzing the physical characteristics of the direct current waveform of the converter station in CF. Then, the Daubechies wavelet coefficient that can represent the 2nd and higher order derivative values of direct current is derived. Once the wavelet coefficients of the sampling points are detected to exceed the threshold, the occurrence of CF is confirmed. Furthermore, by instantly increasing advanced firing angle ? in the inverter side, an additional emergency control strategy to prevent subsequent CF is proposed. Eventually, with simulations of the benchmark model, the effectiveness and superiorities of the proposed detection method and additional control strategy in accuracy and rapidity are verified.

Keywords: HVDC; consecutive commutation failure; Daubechies wavelet; 2nd-order vanishing moments; wavelet coefficient (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: 2018
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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