Event communication apparatus for protection relay

Abstract

Disclosed is an event communication apparatus for a protection relay, which effectively simplifies an event determination operation by a main processing module and a communication module, thereby enhancing updating. The event communication apparatus for the protection relay includes a shared memory configured to store and provide data needed to share, a main processing module configured to, whenever an event occurs, update previous event data to a status information of the event and a status occurrence time information as new event data, and write the updated event data into the shared memory, and a communication module configured to periodically read status information from the shared memory, compare the read status information with pre-stored previous status information to determine whether there is a status change, determine occurrence of a new event when there is the status change, and transmit corresponding event data to an supervisory monitor immediately when the new event occurs.

Description

technical field [0001] The present invention relates to protective relays, and more particularly to event communication devices for protective relays. Background technique [0002] A protective relay is a relay that has the function of measuring the voltage, current and power of the distribution line and the function of detecting the fault state of the protection target in addition to the basic relay function. In such protection relays, a protection relay with a remote communication function is connected to a management monitor through a communication line, and periodically sends information (in other words, data) of the protection relay to the management monitor according to an industrial communication protocol. [0003] In other words, when event information such as measured values ​​of voltage, current, and power quantities, status information such as fault status, external contact status signal input, contact control output based on a predetermined sequence, or informati...

AI Technical Summary

Problems solved by technology

[0027] Regarding the communication module 20, when the low priority communication with the management monitor 200 and the high priority determination of the event (step S3 above) are performed simultaneously, the low priority communication with the management monitor 200 is delayed until the high priority The operation of the determined event of priority ends, therefore, the data communication speed between the communication module 20 and the supervisory controller 200 will be slower

On the other hand, when the priority of the event determination operation performed by the main processing module 10 and the communication module 20 is lower than that of the communication with the management monitor 200, the data communication speed between the communication module 20 and the supervision management module 200 will be satisfactory, but the update of event data will be poor

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