Communication error monitoring system of power device based on Ethernet and method thereof

Abstract

Disclosed is communication error monitoring system and method thereof. In the present disclosure, a master lower-level device, at least one or more slave lower-level devices, and an upper-level monitoring unit are inter-connected via Ethernet, wherein the upper-level monitoring unit receives information of lower-level devices determined as with communication error from the master lower-level device to request and collect necessary data with the slave lower-level devices except for the lower-level devices with the communication error through Ethernet. And thus, a communication delay unnecessary of an entire power system is eliminated and a real time response and stability of a system is enhanced.

Description

Technical field [0001] The present disclosure relates to an Ethernet-based power supply monitoring system, and more particularly to an Ethernet-based power supply device capable of quickly and accurately diagnosing communication errors in the case of using Ethernet to communicate between multiple lower-level devices and upper-level monitoring units Communication error monitoring system and method thereof. Background technique [0002] In a switching environment where communication in power systems such as protective relays and PLCs (programmable logic controllers) installed in power distribution stations has gradually changed from serial lines to Ethernet, when a communication error occurs, because it involves comprehensively To switches, optical converters, cables and other equipment, it is difficult to find the cause of the error. [0003] The protection relay is a device used to protect the network from various accidents such as overcurrent, short circuit and ground fault, and ...

AI Technical Summary

Problems solved by technology

Here, since communication errors with the protection relays can persist even in situations where collisions between data do not cause errors, continuous data requests from the protection relays can prevent efficient operation of the system

[0016] Moreover, the more intelligent upper-level monitoring unit can be configured not to perform data requests to the protection relays with communication failures, but it is difficult to reflect the status of the protection relays in real time, and it is not easy to build such a system

In particular, it is difficult to reflect the state of the protection relay in real time when the components of the protection relay are complex and numerous

[0017] In data communication via Ethernet, data transmission / reception between the upper monitoring unit and the protective relay takes a length of time between about 4 megaseconds and 50 megaseconds under normal conditions, but takes 1 second and The time between 5 seconds and the delay time waiting for data at the upper monitoring unit

Therefore, as the number of protective relays is further increased, the delay time occurring in the whole system increases in arithmetic progression

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