Mine High Voltagecombination Switch Control System Based On PLC

In the coal mining, the traditional face power supply mode for the single starter power supply, the starters can not be linked between the need for more staff, maintenance and inspection of large,more wiring cable,coal mining costs higher,Production efficiency is low.The combination switch can realize all the functions of the single starter, can improve the controlled equipment from a single control to upgrade to single-machine two-speed,dual-speed,sequential control and other linkage control functions,can further enhance the coal mine fully automated equipment control and Coal mining efficiency.Based on the deep research on the power supply situation of fully mechanized coal mining face in China and abroad, combined with the basic architecture of the existing combination switch control system in China, this paper puts forward the programmable logic controller PLC as the core controller, Current, voltage signals and other signals transmitted to the core controller unified calculation, management, the formation of a single controller with a centralized protection of the form of the structure of the combined switch control system.And through the voltage level of 3300V eight-loop combination switch control control system hardware circuit research, software program preparation design, man-machine interface design, to achieve the control system to achieve both the single starter with the owe Pressure,short circuit, overload, leakage protection, phase protection, insulation detection and protection functions, while in the logic control mode to achieve single control, two-speed control, sequential control, to reduce the downhole equipment, reduce the site cable connection, reduce staff input Quantity, reduce the amount of maintenance, improve the efficiency of coal production purposes.In this paper, the design of the combined switch control system for industrial testing, the combined switch control system of the functional indicators are met or higher than the relevant national standards, to achieve the desired purpose. The system is stable and reliable,operable, maintainable, the system response is timely and the action sensitivity is high. The promotion and utilization of the combined switch control system has a positive effect on the improvement of coal mining efficiency.