3kv combination switch control system based on PLC

A combined switch and control system technology, applied in general control systems, control/regulation systems, program control, etc., can solve problems such as inconvenience, stoppage, and economic loss in coal mines, and achieve the effects of convenient operation, safety assurance, and reliable protection action.

Inactive Publication Date: 2018-06-05
王明良
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AI Technical Summary

Problems solved by technology

In order to make these devices work normally, a large number of high-power drive motors are required to be used together with these devices, and if one of the motors breaks down, the production will be forced to stop, which will bring great harm to the production of coal mines. Inconvenience, causing huge economic losses

Method used

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  • 3kv combination switch control system based on PLC
  • 3kv combination switch control system based on PLC
  • 3kv combination switch control system based on PLC

Examples

Experimental program
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Effect test

Embodiment Construction

[0017] The present invention will be further described below in conjunction with drawings and embodiments.

[0018] Such as figure 1 , in the electrical protection controller, PLC, as the "brain" of the main protection system, is responsible for judging and processing various variables collected, and is the control core of the combined switch. The collected analog quantities are converted into digital values ​​through the A / D module Only after the amount can be sent to the PLC for processing by the PLC.

[0019] Such as figure 2 , The current sampling circuit selects the B-phase current as the display of the current value. The B-phase AC current first passes through two current transformers, and then passes through the rectifier bridge rectification, resistor current limiting, and capacitor filtering, and becomes a DC current flowing through the sampling resistor. Within a certain range, the magnitude of the circuit current can be known by measuring the output voltage of th...

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Abstract

The invention provides a 3kV combination switch control system based on a PLC and the system is suitable for the field of electrical control. According to the switch control system, the PLC is used asa CPU of a circuit, various protection actions are very reliable and accurate, the probability of failures is reduced, various protections can be provided, the safety of a human body is effectively guaranteed, multiple combination modes are designed for different requirements in practical applications, thus the application range of a combination switch is wider, and the effect of use is better. Under the premise of satisfying the requirements of system reliability and stability, an appropriate central control unit is selected, the control mode is flexible, the operation is convenient, the performance is stable, the protection is reliable, and thus the operation status and fault display of the combination switch are more intuitive.

Description

technical field [0001] The invention relates to a PLC-based 3kV combination switch control system, which is suitable for the field of electric control. Background technique [0002] During the rapid and stable development of my country's economy, the role of energy in various industries has become more and more important. Although my country is rich in energy, the distribution is very uneven. At present, coal is still the main energy source in our country. Coal mining has also changed from manual coal mining to various modern coal mining equipment, and people have a better understanding of coal mining. With the rapid development of economy and technology, in recent years, in order to improve the utilization rate of coal energy and reduce the waste of energy, the state has carried out relevant technical transformation on existing state-owned key large and medium-sized coal mines, while improving technical capabilities , It also increases the total installed capacity of the ...

Claims

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Application Information

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IPC IPC(8): G05B19/05
CPCG05B19/054G05B2219/15005
Inventor 王明良
Owner 王明良
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