Intelligent distributed rapid protection and fault isolation method of self-adaptive power distribution network

Abstract

The invention discloses an intelligent distributed rapid protection and fault isolation method of a self-adaptive power distribution network. A terminal collects and gathers electric quantities of incoming wires and branches as well as network topology information of an interval node; rapid peer-to-peer network communication is used to send the electric quantities and network topology information of the interval node and receive and process electric quantities and network topology information from upstream and downloads nodes, and online information of terminals of the upstream and downstream nodes are monitored in real time; according to adaptive fault determining conditions and combined logics preset for single-feed-line network, ring network and petal network structures of the distribution network, a fault type and a fault area of the power distribution network can be determined and identified rapidly when the power distribution network is in a fault condition; and a control signal is output to protect a rapid tripping port, and a corresponding switch is tripped to isolate a fault. The method can be applied to the intelligent power distribution network, and realizes fault analysis and rapid fault isolation when complex network structures, as the single-feed-line network, ring network and petal network structures, of the power distribution network have faults, and the power supply reliability of the distribution network is improved effectively.

Description

technical field [0001] The present invention aims at fault information detection, rapid protection and isolation of fault points, fault recovery, etc. when current distribution network equipment fails. To solve the problem of long power supply recovery time, which affects the stable operation of the distribution network and the long-term normal power consumption of users, an intelligent distributed fast protection and fault isolation method for adaptive distribution network ring network and petal network was invented. The invention belongs to the technical field of electric power system intelligent distribution network. Background technique [0002] Due to the distribution network involving many users, wide coverage area, complex user nature, many network branches, complex topology, and high requirements for operation stability and power supply reliability, this puts forward higher requirements for the rapid fault handling of the distribution network automation system. requ...

AI Technical Summary

Problems solved by technology

Features: No need to renovate equipment once, low investment, easy to implement and promote; Disadvantages: It takes a long time to locate and analyze faults, and cannot be accurately located and isolated;

Features: Does not rely on communication and automation master station to achieve "on-site" fault isolation; Disadvantages: The switch is delayed step by step to close, so that the judgment of the accident area, the isolation of the accident area and the recovery of power transmission in the non-accident area take a long time; the power supply before the fault The power supply of the non-fault section on the side needs to be controlled by the distribution automation master station

Features: no need for protection coordination, easy to implement; for lines with complex network topology and many branches, it is relatively convenient to deal with, and has good scalability; disadvantages: substation reclosing cooperation is required; the function depends on the master station, and the fault location and isolation is at the minute level. The time is long; every time there is a fault, the entire line has a short-term blackout

However, the engineering implementation of this method is relatively complicated, and it has limited response to the complex topology of the distribution network and the engineering application of rapid development and expansion, and cannot fundamentally solve the problem of feeder protection adaptability

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