Step control device and control method for antiskid crosspiece of loaded pressure regulating switch of transformer

Abstract

The invention relates to a stepping control device of an anti-slip stop of an on-load voltage tap-changer of a transformer and a control method thereof, pertaining to the satety and automatic control in the transformer substation technical field. The stepping control device and the control method of the invention is characterized in that: a logic judging and processing unit is arranged in front of an instruction output unit and the input end of the logic judging and processing unit are respectively connected with the output ends of signals, such as the output end of a signal source, the output end of a position indicating sensor, etc. The logic judging and processing unit is connected with the input end of a voltage tap-changer operating mechanism by the instruction output unit; external commands are received by the signal source to obtain startup control signals to control the startup of procedures, collect the status signals of the transformer and pretreat the signals to be sent to the logic judging and processing unit to process the logic judgment. According to the judgment results, the instruction output unit controls the operation of the voltage tap-changer operating mechanism. The stepping control device and the control method of invention have the advantages that the safety of electric networks and equipment can be guaranteed, the power supply is reliable, the power supply quality is improved and the resources are saved, etc.

Description

technical field [0001] The invention relates to a safe automatic control technology for reliably adjusting a power supply voltage through an on-load tap-changing transformer in a substation, in particular to a step-by-step control device and control method for an anti-slip gear of a transformer on-load tap-changing switch. Background technique [0002] At present, in the power system, by using the on-load tap changer to connect the power grid, stabilize the load center voltage, adjust the power flow distribution of the power grid, improve the operating conditions of electrical equipment and improve the quality of power supply voltage, and meet the needs of industrial and agricultural production, it has extensive advantages. It has been widely used in power systems in the past ten years. In the metallurgical and steelmaking industry, by adjusting the voltage online and controlling the temperature of the furnace to ensure the quality of the product, the application range and p...

AI Technical Summary

Problems solved by technology

Due to the limitation of product quality, operation and maintenance and personnel operation level, incidents of wrong operation occur frequently, and it is difficult to ensure that the transformer in operation meets the requirements of transformer operation regulations and power supply voltage quality standards during voltage regulation operation.

In the current "unattended" substation, once the slippage joint commissioning and wrong operation occur, the existing automation equipment cannot immediately carry out remedial treatment, which will affect the safe operation level of the substation, affect the power supply quality of the power company, and cause the voltage to drop or rise abnormally. High, there may also be power supply interruptions to users, affecting power supply reliability

In particular, the failure of the operating mechanism and the joint adjustment of sliding gears will easily cause serious overloading of the transformer due to the circulation, increasing the loss of the transformer itself, and the heat generated will cause the temperature of the transformer to rise abnormally, which seriously endangers the safe operation of the transformer.

In addition to the above-mentioned consequences for metallurgical and steelmaking industries, it also seriously affects the quality of products, and even causes damage to production equipment

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