基于PLC的矿用高压组合开关控制系统研究

发布时间：2018-05-30 00:29

本文选题：工作面供电 + 组合开关　；参考：《西安科技大学》2017年硕士论文

【摘要】：在煤炭开采中,传统的工作面供电模式为单体启动器供电,各启动器之间无法进行联动,所需工作人员较多,维护检修量大,接线线缆较多,采煤成本较高,生产效率较低。组合开关可以实现单体起动器的所有功能,能够提高被控设备由单一控制提升为单机双速、双机双速、顺序控制等联动控制功能,可进一步增强煤矿综采设备的自动化控制能力和采煤效率。在深入研究了国内外井下综采工作面供电情况的基础上,结合我国现有组合开关控制系统的几种基本架构形式,本文提出了以可编程逻辑控制器PLC为核心控制器、将各回路电流、电压信号和其他信号传输至核心控制器统一计算、管理,形成具有单一控制器的集中保护形式架构的组合开关控制系统。并通过对电压等级为3300V的八回路组合开关控制控制系统硬件电路的研究,软件程序的编写设计,人机界面的设计等,实现了该控制系统达到既具备单体起动器所具备的过欠压、短路、过载、漏电保护、断相保护、绝缘性能检测保护功能,同时在逻辑控制方式上实现单机控制,双速控制,顺序控制等,达到减少下井设备,减少现场电缆连接,减少人员投入量,减少维护量,提高产煤效率的目的。本文对所设计组合开关控制系统进行工业性试验后,组合开关控制系统各项功能指标均达到或高于国家相关标准要求,达到了预期目的。系统运行稳定可靠,可操作性、可维护性强,系统响应及时,动作灵敏度高,本文研究的组合开关控制系统的推广使用对煤炭开采效率的提升有着积极的作用。
[Abstract]:In coal mining, the traditional power supply mode of working face is single starter power supply, which can not be linked between the starters, which requires more staff, more maintenance and overhaul, more wiring cables, higher mining cost and lower production efficiency. The combined switch can realize all the functions of the single starter, and can enhance the controlled equipment from single control to single machine dual speed, double machine double speed, sequence control and other linkage control functions. It can further enhance the automatic control ability and mining efficiency of fully mechanized coal mining equipment. On the basis of deeply studying the power supply situation of underground fully mechanized mining face at home and abroad, combined with several basic structure forms of China's existing combinatorial switch control system, this paper presents a programmable logic controller (PLC) as the core controller. The current, voltage and other signals of each loop are transmitted to the core controller for unified calculation and management to form a combined switch control system with a centralized protection structure with a single controller. Through the study of the hardware circuit of the 8-loop combined switch control system with voltage grade of 3300V, the design of software program and the design of man-machine interface, the control system can achieve the over-undervoltage of the single starter. Short circuit, overload, leakage protection, phase break protection, insulation performance detection and protection function. At the same time, single machine control, double speed control and sequential control are realized in logic control mode, so as to reduce downhole equipment and field cable connection. Reduce personnel input, reduce maintenance, and improve coal production efficiency. After the industrial test of the designed composite switch control system, all the functional indexes of the combined switch control system are up to or higher than the requirements of the relevant national standards, and the expected purpose has been achieved. The operation of the system is stable, reliable, operable, maintainable, the system response is timely, and the action sensitivity is high. The promotion and use of the combined switch control system studied in this paper plays a positive role in improving the efficiency of coal mining.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD611.3;TP273

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