Microgrid fault processing method and centralized monitoring system

Abstract

The invention discloses a microgrid fault processing method and a centralized monitoring system. On-line automatic identification of a fault point or equipment which really needs to be sent to an off-line order for maintenance is realized. The microgrid comprises a plurality of devices B1, and a device A1, a device A2,..., a device Am which are sequentially cascaded to the power grid, wherein m isgreater than or equal to 0; each device B1 is in communication connection with the centralized monitoring system; the input end of the device A1 is connected with a plurality of devices B1 which areoutput in parallel. The method comprises the steps: judging whether output side electrical parameter abnormity exists in each device B1 or not; if the at least one device B1 has the abnormal output side electrical parameter, judging whether the proportion of the device B1 with the abnormal output side electrical parameter exceeds a preset value or not; if so, reporting that at least one of the device A1, the device A2,..., the device Am and the power grid has a fault, and each device B1 has no fault; and if not, reporting that the device B1 with abnormal electrical parameters on the output side fails exists.

Description

technical field [0001] The invention relates to the technical field of micro-grids, and more specifically, to a micro-grid fault handling method and a centralized monitoring system. Background technique [0002] Most of the devices in the microgrid (such as photovoltaic power plants) can communicate with the centralized monitoring system, but a few devices cannot communicate with the centralized monitoring system due to lack of communication interfaces or other reasons, so the centralized monitoring system can only monitor the vast majority of them. The centralized monitoring system can only collect and display the fault alarm information sent by the monitored equipment. [0003] In addition, for the equipment with upper-lower relationship in the microgrid, when the upper-level equipment fails, although the lower-level equipment does not fail, it may be implicated and send a fault alarm message by mistake. When the upper-level equipment fails, the lower-level equipment will ...

AI Technical Summary

Problems solved by technology

[0002] Most of the devices in the microgrid (such as photovoltaic power plants) can communicate with the centralized monitoring system, but a few devices cannot communicate with the centralized monitoring system due to lack of communication interfaces or other reasons, so the centralized monitoring system can only monitor the vast majority of them. The centralized monitoring system can only collect and display the fault alarm information issued by the monitored equipment

[0003] In addition, for the equipment with upper-lower relationship in the microgrid, when the upper-level equipment fails, although the lower-level equipment does not fail, it may be implicated and send a fault alarm message by mistake. When the upper-level equipment fails, the lower-level equipment will stop automatically Alarm information, so the failure of the unmonitored equipment may implicate the monitored equipment to send fault alarm information by mistake

[0004] To sum up, since the centralized monitoring system can only display the fault alarm information issued by the monitored equipment, and the failure of the unmonitored equipment may cause the monitored equipment to issue fault alarm information by mistake, it is not easy for the monitoring personnel to pass the centralized monitoring system. The fault alarm information finally presented on the monitoring system identifies the fault point or equipment that really needs to be dispatched offline for maintenance. It often requires multiple confirmations offline to the site, resulting in long maintenance cycles and loss of power generation

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