Seismic risk assessment method for coupling loops in substations or conversion stations

摘要

Build a failure model under the coupling action of the equipment of the substation or conversion station and the step of calculating the probabilistic earthquake hazard of the location of the substation or conversion station, and obtain the failure probability under the coupling action of the equipment at the time of earthquake Steps to do, build a disaster loss model during an earthquake of equipment, and acquire economic loss due to equipment failure during an earthquake, and "earthquake risk = probabilistic earthquake hazard of location x failure under the combined action of equipment" It is a seismic risk evaluation method of a coupling loop of a substation or a conversion station including a step of acquiring an earthquake risk expressed by the formula “probability × economic loss”. In this method, not only the failure probability of a single facility but also the failure model and failure probability of the connecting bus are taken into consideration, and at the same time, the influence on the electrical performance of the equipment when a large displacement occurs due to the seismic action is regarded as one of the influence factors of the risk. Based on this, a coupled loop failure model is created and a seismic risk index for the coupled loop is created. [Selection diagram] Fig. 1