Online monitoring system for diagnosing substation telemetering fault based on multi-data source comparison technology

Abstract

The invention discloses an online monitoring system for diagnosing a substation telemetering fault based on a multi-data source comparison technology, which is characterized in that a telemetering fault detection device is at least provided with five Ethernet monitoring ports, four of the Ethernet monitoring ports are respectively connected with switch mirror ports of an interlayer network, a station control network, a telecontrol network and a WAMS network and establish monitoring links with the networks, the other Ethernet port realizes communication connection with a telemetering fault monitoring terminal; and the telemetering fault detection device comprises a configuration management module, a communication message capturing module, a communication protocol parsing module, a real-time database, a multi-data source comparison module, an alarm management module, a historical database and a background communication and operation control module. The online monitoring system is deployed at the level of a substation, so that existing data sources of the substation are effectively utilized, the principle of fault diagnosis is simple, and the online monitoring system not only can detect an existing telemetering fault but also can preliminarily position a fault source and list most possible causes of the fault.

Description

technical field [0001] The invention relates to a method for diagnosing telemetry faults in substations, in particular to an online monitoring system for diagnosing telemetry faults in substations using a multi-data source comparison technique. Background technique [0002] Power grid telemetry data is the main basis for power grid dispatching command and power grid operation monitoring. The inaccuracy of telemetry data directly affects the correct judgment of the power grid operation mode and seriously affects the safety of the power grid, especially when these situations occur in remote or local automatic closed-loop control systems. Its seriousness is more prominent in systems with functions such as automatic reactive voltage control (AVQC) and automatic generation control (AGC). At present, power grid companies are more and more strict in the assessment of substation telemetry data, and the requirements are getting higher and higher. It is urgent to judge and diagnose te...

AI Technical Summary

Problems solved by technology

On the one hand, since the state estimation method is based on the calculation of grid model parameters and real-time data, the test method of grid model parameters and the refresh rate of real-time data will affect the accuracy of state estimation, and then affect the judgment of telemetry fault accuracy. On the other hand, since the substation is a node of the power grid, state estimation cannot be effectively applied at the substation level to judge telemetry faults in the substation

Therefore, when the EMS system of the superior control center detects that the telemetry is inaccurate by means of state estimation and other methods, it is often difficult to implement a certain outgoing line of the specific substation. Effective monitoring technical means can only rely on experience to analyze faults, which is blind, which affects troubleshooting and brings safety hazards to the efficient operation of the power grid. There is an urgent need for a method and method that can automatically diagnose and locate telemetry faults at the substation level. tool

Images