Intelligent control method and intelligent control device of transformer cooling system

Abstract

The invention discloses an intelligent control method and an intelligent control device of a transformer cooling system. The method comprises the following steps: detecting the cooling oil temperature and the load current value of the upper layer and the lower layer of a transformer; determining the group number, the table number and the time of a start / stop cooler; starting / stopping at least one oil pump; starting / stopping at least one fan in a delay mode; detecting the current of the oil pump and the fan; entering a device debug mode; and recording events. The device comprises a DSP and ARM double-core hardware platform, wherein a DSP plate comprises a cooling oil temperature data acquisition and analysis module, an oil pump motor current data acquisition and processing module, an oil pump motor control module, a fan motor current data acquisition and processing module and a fan motor control module; and the ARM plate comprises a user interface, a communication module and a data storage module. The invention combines control, relay protection, real-time monitoring and diagnosis as a whole, has more intelligent on-line real-time control, can define and configure the parameter of the transformer cooling system, improves the production efficiency and saves the operation and maintenance cost of the transformer.

Description

technical field [0001] The invention relates to transformer cooling, in particular to an intelligent control method and an intelligent control device for a transformer cooling system. Background technique [0002] The existing transformer operating regulations require that the input and withdrawal of the main transformer cooler group be automatically controlled by the control system according to the temperature of the upper cooling oil of the main transformer or the operating load of the transformer. A traditional control system generally includes a programmable logic controller (Programmable Logic Controller, abbreviated as PLC), an intermediate relay, a time relay, an AC contactor, a fuse, and a thermal overload relay. The working status of the cooler group is running, auxiliary, and standby And stop, can not be adjusted online; and there are the following defects: the system composition is complex, the failure rate is high; the cooling oil temperature is controlled by har...

AI Technical Summary

Problems solved by technology

A traditional control system generally includes a programmable logic controller (Programmable Logic Controller, abbreviated as PLC), an intermediate relay, a time relay, an AC contactor, a fuse, and a thermal overload relay. The working status of the cooler group is running, auxiliary, and standby And stop, can not be adjusted online; and there are the following defects: complex system composition, high failure rate; hard electric shock control by cooling oil temperature, easy to cause frequent start-up of cooler group; thermal overload relay has incomplete protection function for cooler group

If the anti-accident measures that the submersible pumps are switched during operation should be carried out one by one with an interval of no less than 3 minutes each time, the existing control system loop will be further complicated, which is even more unfavorable for maintenance personnel's operation and maintenance.

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