An Online Fault Simulation Method of Medium Voltage Ring Network System Based on Goose Technology

Abstract

The present invention relates to a method in the technical field of electric power system relay protection, in particular to an on-line fault simulation method for a medium-voltage ring network system based on GOOSE technology. The method is a simulation software running on a local monitoring background or a portable computer Cooperate with the protection device program, and use the station control layer network to send and receive messages. Set the fault point in the wiring diagram of the simulation software system. When the simulation system fails, the simulation software sends simulated fault data to each relevant protection device. Each relevant protection device judges whether the protection operates according to the received information and the operating status of the device. The beneficial effects of the present invention lie in the following points: 1. The action of protection is not affected by simulated faults, and online simulation is realized. 2. It can check whether the parameters set by each device are correct to ensure the correct operation of the device. 3. Solved the difficulty of cross-site and cross-interval protection joint debugging. 4. The criterion formula is simple and reliable.

Description

Technical field [0001] The invention relates to a method in the technical field of power system relay protection, in particular to an online simulation method of a medium voltage ring network system fault based on GOOSE technology. Background technique [0002] In the distribution network system, especially in the urban rail transit medium-voltage ring network (35kV) system, the ring network structure is increasingly adopting the "big ring string" wiring method, and the number of substations in the ring string is large. Each substation is equipped with protection devices in the substation and between the substations. The distributed protection devices are based on the GOOSE technology of IEC 61850 to send and receive information from other protection devices to realize the incomplete differential protection of the distributed bus and the differential protection between the substations. [0003] The following problems exist in the prior art: [0004] 1. There is a difference between...

AI Technical Summary

Problems solved by technology

There are a large number of protection devices that make up the system. Each protection device based on GOOSE technology needs the cooperation of other protection devices to complete correctly. The usual device debugging method is not convenient for testing the performance of each protection device.

[0005] 2. There are many parameters set for each device. When the parameter setting is wrong, it will affect the correct action of the protection device.

Images