Power supply overload monitoring control method

Abstract

The invention discloses a power supply overload monitoring control method, which successively comprises the following steps that all acquisition and execution units are connected to an overload logicdetermination unit through an optical fiber communication network to realize real-time information interaction; the acquisition and execution units acquire the information of a host substation and uploads the information to the overload logic determination unit; the overload logic determination unit determines an overload control strategy and sends a load shedding trip result to the acquisition and execution unit of a corresponding 110kV load substation for actual execution. The method solves the problem in the prior art that the use of a spare automatic switch-in device may cause overload ofa power supply line. When used, the power supply overload monitoring control method can predict the overload and executes overload control before the spare automatic switch-in device operates in orderto avoid excessive load current on the power supply line after the power supply is restored by the spare automatic switch-in device, and avoid the power loss of the 110kV load substation caused by directly cutting off the 110kV outgoing line.

Description

technical field [0001] The invention relates to a power system, in particular to a power supply overload monitoring and control method. Background technique [0002] The 220kV substation in the power supply system may have weak power supply: for example, due to phased construction or equipment maintenance, there may be a weak mode of operation of a single main transformer. At this time, if a single main transformer fails, it will cause 220kV substation The 110kV busbar loses voltage, which leads to the voltage loss of multiple 110kV substations powered by the busbar, causing power outages for a large number of users; and for example, due to maintenance of some 220kV incoming power supplies or grid structure problems, there is only one incoming power supply or one double The return line is powered by a 220kV substation, and the 220kV substation cannot perform 220kV backup power self-injection, and there will be a weak way of being powered by a single power source. At this tim...

AI Technical Summary

Problems solved by technology

[0003] The invention solves the problem in the prior art that the use of the standby self-switching device may cause the overload of the power supply line, and provides a power supply overload monitoring and control method, which can predict the overload before the standby self-switching action and execute the over-loading method. Load control, to avoid excessive load current of the power supply line after the recovery of power supply by the standby automatic switching operation, and not to cut off the 110kV outgoing line directly to cause the 110kV load substation to lose power