FTU-based distributed type feed line automation system allowable fault processing method

Abstract

The invention discloses an FTU-based distributed type feed line automation system allowable fault processing method and is suitable for a feed line network which needs to operate in an open- / closed-loop state and which comprises multiple power supplies, multiple branches and multiple breakers. The system is composed of feeder terminal units (FTUs), which are connected to all breakers of various feed lines, and a communication network. According to the method, fault location and isolation are performed through sending allowable signals between adjacent terminals. When a network topology or an operation mode is changed, the system only needs to change configuration of local terminals and then continue to operate. When communication is interrupted, the expanded fault location and the expanded isolation are achieved through expanded communication. So the feed line automation method by utilizing the adjacent FTU to send the allowable information improves reliability of feed line automation protection, and has better performance compared with an existing distributed type feed line automation scheme.

Description

technical field [0001] The invention discloses a permissive fault handling method for a distributed feeder automation system based on an FTU (Feeder Terminal Unit, feeder terminal device), which belongs to the technical field of grid feeder automation. Background technique [0002] There are two existing feeder automation solutions, one is through a centralized method, but this method relies on communication and centralized controllers, and it is easy to fail to locate and isolate faults quickly due to communication congestion, and when the centralized controller fails , the feeder automation for the entire area will exit. The other is distributed. This method relies on judging the fault quantity information of adjacent circuit breakers to achieve fault location. However, the existing solutions are only for simple topological structures. When the multi-power open-loop operation is performed, multiple FTU information needs to be modified, which reduces the efficiency of faul...

AI Technical Summary

Problems solved by technology

[0002]There are two existing feeder automation solutions, one is through a centralized method, but this method relies on communication and centralized controllers, which is prone to communication congestion However, fault location and isolation cannot be performed quickly, and when the centralized controller fails, the feeder automation in the entire area will exit

The other is distributed. This method relies on judging the fault amount information of adjacent circuit breakers to realize fault location. However, the existing solutions are only for simple topological structures. When multiple power sources are running in a closed loop, they cannot accurately Fault location, when multi-power supply open-loop operation, need to modify multiple FTU information, reducing the efficiency of fault handling

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