DC Monitoring System for Substation Relay Protection Based on SCD Modeling

Abstract

The invention discloses a substation relay protection direct current monitoring system based on substation configuration description (SCD) modeling. Firstly, a primary standard SCD file is supplemented with a DC model, and the association relation between secondary equipment and the DC model is established; the SCD file supplemented with the DC model is downloaded to a relay protection state monitoring device, the corresponding relation between a relay protection system and the DC model in the SCD file is analyzed according to an SCL label search language, and DC signal match bases of an online monitoring device are formed; information of a direct current monitoring system is obtained through an MMS network, and DC state information in the direct current monitoring system is analyzed according to a preset DC signal configuration table and matched with the DC model corresponding to SCD; according to the corresponding relation between the relay protection system and the DC model in the SCD file, a relay protection system scope influenced by DC abnormity is displayed visually. Thus, relay protection system DC online monitoring based on the SCD model is achieved, and visual judgment technological means are provided for operation maintainers.

Description

technical field [0001] The invention relates to a DC monitoring system for substation relay protection based on SCD modeling, which belongs to the technical field of power systems. Background technique [0002] With the advancement of engineering application based on IEC61850 substation automation technology, the connection method of substation secondary equipment IED is replaced by optical fiber communication with traditional cable connection. substation event), the secondary system of the substation is covered by the SCD (Substation Configuration Description, substation configuration description) file, but as the DC power supply (hereinafter referred to as DC) of the relay protection system (merging unit, protection device, intelligent terminal, the same below). It is not included in the existing SCD file, and the operation and maintenance personnel cannot realize the status monitoring of the relay protection system DC through the management of the SCD file, which brings i...

AI Technical Summary

Problems solved by technology

[0002] With the advancement of engineering application based on IEC61850 substation automation technology, the connection method of substation secondary equipment IED is replaced by optical fiber communication with traditional cable connection. substation event), the secondary system of the substation is covered by the SCD (Substation Configuration Description, substation configuration description) file, but as the DC power supply (hereinafter referred to as DC) of the relay protection system (merging unit, protection device, intelligent terminal, the same below). It is not included in the existing SCD file, and the operation and maintenance personnel cannot realize the status monitoring of the relay protection system DC through the management of the SCD file, which brings inconvenience to the operation and management of the substation, making the secondary system management of the smart substation based on SCD missing important link

At present, the monitoring of the DC system is completed by an independent "DC monitoring system". The existing technology reflects the DC status of IEDs (merging units, protection devices, intelligent terminals, etc.) through the monitoring of IED DC amplitude changes, but does not reflect these IEDs. The relationship between (that is, an IED DC abnormality will affect some protection systems)

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