A Method for Earthquake Risk Assessment of Substation or Converter Station Coupling Circuit

Abstract

The invention discloses an earthquake risk assessment method for a coupling circuit of a substation or a converter station, comprising: calculating the site earthquake risk probability of a substation or a converter station; Model, to obtain the failure probability of equipment under the coupling effect under the earthquake situation; establish the disaster loss model of equipment in the earthquake, to obtain the economic loss of equipment failure in the earthquake; obtain the earthquake risk, the earthquake risk: earthquake risk = Seismic hazard probability of the site x failure probability of equipment under coupling action x disaster economic loss. This method not only considers the failure probability of single equipment but also the failure mode and failure probability of connecting busbars. At the same time, the impact on the electrical performance of equipment when large displacements occur under earthquake action is taken as an influencing factor of risk. On this basis, a A coupled loop failure model to develop a coupled loop seismic risk index.

Description

technical field [0001] The invention relates to earthquake risk assessment, in particular to an earthquake risk assessment method for a coupling circuit of a substation or a converter station. Background technique [0002] Earthquake risk analysis is based on the full analysis of the hazards of earthquakes (disaster-causing factors) and the vulnerability of hazard-bearing factors, and the assessment of the possibility of earthquakes in the assessment area and the possibility of causing a certain degree of disaster and social consequences. At present, the seismic risk assessment of substation\converter station is mostly aimed at the single equipment in the station, mainly focusing on the analysis of the seismic vulnerability of the single equipment, and there are few reports on the seismic risk assessment method of the coupling system. At the same time, due to the limitation of the size of the shaking table and the lack of dynamic characteristic parameters of the equipment, t...

AI Technical Summary

Problems solved by technology

The document "Analysis of the Impact of Sliding Fittings on the Seismic Performance of Interconnected High-Voltage Electrical Equipment" analyzes the stress of the DC circuit system under different connection methods under conventional seismic design earthquake conditions, and studies the dynamic characteristics and seismic performance of the connection method on the high-voltage circuit system The article does not consider the risk analysis from the perspective of probability

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