Power failure analytical method based on topological island analysis

Abstract

The invention discloses a power failure analytical method based on topological island analysis. The power failure analytical method based on topological island analysis includes acquiring all connection nodes which are connected with two ends of a deflection switch through other closed switches, and relevant equipment information; judging whether deflection of the switch causes changes of the quantity of topological nodes according to the information in the last step, and finishing revision if the topological nodes are not affected; further performing analysis revision on a topological island if the quantity of the topological nodes is changed. According to the power failure analytical method based on topological island analysis, on the basis of equipment in connection with the topological island for power failure analysis, topological local revision is performed according to a hierarchical search strategy, and efficiency of power failure topology analysis is improved; great values are achieved on optimization of load transfer and power failure operation plans of a power distribution network under emergency conditions.

Description

technical field [0001] The invention relates to a power outage analysis method, in particular to a power outage analysis method based on topological island analysis. Background technique [0002] The analysis algorithm of topological island forms a topological island through a group of topological nodes connected together by non-zero impedance elements (such as transformers, lines, etc.). Its analysis algorithm is similar to that of topological nodes. Treat topological node objects as connecting node objects, treat non-zero impedance components such as transformers and lines as closed switch objects, and use node analysis algorithm to analyze topological islands. [0003] There are two methods for existing blackout extent analysis: [0004] 1. It is basically based on a single feeder (medium voltage line), based on the topology of the single-line diagram, considering factors such as switch connections, and taking the outgoing line of the substation as the power point to an...

AI Technical Summary

Problems solved by technology

Because the maintenance of the scheduling network diagram is only the contact switch, etc., and does not maintain the load equipment such as users and transformers. When analyzing the power outage range, only the boundary switch of the power outage range can be obtained more accurately, and the detailed content of the power outage range cannot be obtained. It needs to be combined with the production system. According to the equipment information, manual selection is performed, and transformers and users are added to the power outage range, which may cause inaccurate data and abnormal analysis; at the same time, due to incomplete switch maintenance of the network diagram, factors such as multi-power users and important users’ power protection cannot be considered. The analysis of the power outage range including live work is inaccurate and requires a lot of manual intervention