Method for processing water flow signals and oil flow signals of large main transformer forced oil water recirculator

Abstract

The invention provides a method for processing water flow signals and oil flow signals of a large main transformer forced oil water recirculator. The method comprises the following steps that 1, input signals are subjected to logic and operation; 2, the operated signals correspond to computational results; automatic information processing is achieved through the above steps. The input signals are delayed for a period of time and then subjected to logic and operation. By means of the method, the input signals collected on site and other signals can be subjected to logic and operation, fault signals and abnormal signals are generated, therefore, the operating state of the recirculator can be reflected better, and the load of operation monitoring of equipment can be reduced.

Description

technical field [0001] The invention relates to the field of intelligent power supply, in particular to a method for processing water flow signals and oil flow signals of a forced oil circulation water cooler of a large main transformer. Background technique [0002] The cooling methods used by domestic large-scale transformers mainly include air cooling, forced oil circulation air cooling, forced oil circulation water cooling, etc. The cooler system is a very important auxiliary equipment for large transformers. Whether it can be reliably put into normal operation and different cooler operation modes are directly related to the actual load capacity of the transformer. For a long time, the control system of the transformer cooler has been controlled logically by contactors, intermediate relays, time relays, load current relays and temperature relays. With the introduction of the concept of smart grid and the continuous promotion of unattended or less-attended operation mode...

AI Technical Summary

Problems solved by technology

With the introduction of the concept of smart grid and the continuous promotion of unattended or less-attended operation mode, the traditional transformer cooler system control method can no longer meet the new needs

In recent years, many manufacturers have developed intelligent transformer cooler control systems based on programmable logic controllers (PLC), but there are still many deficiencies in actual operation.

The main reason is that the signal display is messy and complicated, especially in this cooler system, there are six independent coolers connected in parallel in the transformer oil circuit, and the coolers will turn on and off a certain number of coolers according to the load size and temperature of the transformer; The process of switching on and off the cooler will cause disturbances in the water flow and oil flow signals. These disturbances will cause the flow signals of the oil flow meter and the water flow meter to repeatedly act. These signals are directly sent to the monitoring system and will be sent to the monitoring system. screen operator causing great disturbance

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