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Keywords

VSCHVDC, black start, evaluation, order relation analysis method, improved CRITIC method, TOPSIS

Abstract

The black start scheme for VSCHVDC can maintain the voltage stability of the converter bus and effectively suppress the possible overvoltage problems. Under this background, an evaluation method is proposed for the black start scheme of VSCHVDC considering aftereffects. Firstly, the operation characteristics of VSCHVDC are introduced; Secondly, the initial recovery evaluation index and aftereffects evaluation index are comprehensively combined to characterize the pros and cons of the scheme. A comprehensive evaluation system is then established to fully reflect the pros and cons of the scheme. Thirdly, the order relation analysis method and the improved CRITIC method are utilized to determine the subjective and objective weight respectively. The combination weighting method based on game theory is then employed to obtain the combination weight of each index to be evaluated. Furthermore, a comprehensive evaluation of the black start scheme of HVDC satisfying all kinds of constraints is analyzed to determine the advantages and disadvantages. Finally, the feasibility of proposed method is verified by the restoration of the power supply with Luxi backtoback VSCHVDC system after a blackout in Yunnan power grid.

DOI

10.19781/j.issn.16739140.2020.06.014

First Page

110

Last Page

116

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