Event communication device for protective relays

Abstract

The invention discloses an event communication device for a protection relay, which effectively simplifies the event determination operations performed by the main processing module and the communication module, thereby enhancing strong updating. The event communication device for a protective relay includes: a shared memory configured to store and provide data for sharing; a main processing module configured to use the state information and state occurrence time information of the event whenever an event occurs updating previous event data as new event data, and writing the updated event data into the shared memory; and a communication module configured to periodically read state information from the shared memory, and to read The obtained state information is compared with the pre-stored previous state information to determine whether there is a state change, and when there is a state change, it is determined that a new event occurs, and when a new event occurs, the corresponding event data is sent to the management immediately monitor.

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 determination event of the priority ends, therefore, the data communication speed between the communication module 20 and the management monitor 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 management monitor 200 will be satisfactory, but the update of event data will be poor

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