Insulating configuration method for flexible direct-current transmission system of modularized multi-level transducer

Abstract

The utility model provides an over-voltage analysis method and an insulating configuration method for a modularized multi-level flexible direct-current transmission system. By the steps of analyzing the over-voltage of the system, arranging an arrester and matching the insulation, various over-voltage of the modularized multi-level flexible direct-current transmission system can be exactly analyzed and calculated; an arrester configuration and parameter selection scheme is searched so as to further complete the insulation matching of system equipment; furthermore, the safety of the modularized multi-level flexible direct-current transmission system during the normal run, the failure period and the period after failure can be ensured, the charge of the whole system is the minimum, and the scheme can be used for guiding related technicians to complete the insulation matching analysis on the modularized multi-level flexible direct-current transmission system at high efficiency.

Description

Technical field: [0001] The invention relates to an insulation coordination scheme for a flexible direct current transmission system of a modularized multilevel converter, in particular to an insulation coordination method for flexible direct current transmission based on a modularized multilevel converter. Background technique: [0002] The insulation coordination of the power system is to comprehensively consider the various acting voltages (including working voltage and overvoltage) that electrical equipment withstands under all possible working conditions in the system, the characteristics of protection devices and the withstand characteristics of equipment insulation to various working voltages. , in order to choose the optimal configuration of protection devices and the insulation level of the equipment, so that the overall equipment cost, maintenance costs and failure losses caused by equipment insulation failures can achieve the highest overall economic and safe opera...

AI Technical Summary

Problems solved by technology

For the AC transmission system and the conventional DC transmission system, you can refer to the national electric power industry standard DL / T620-1997 "Overvoltage protection and insulation coordination of AC electrical installations" and the national standard GB / T311.3-2007 "Insulation coordination part 3" : HVDC Converter Station Insulation Coordination Program", to carry out surge arrester configuration, parameter selection and equipment insulation level determination, but for flexible DC transmission systems, there is currently no specific insulation coordination design method

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