随着煤炭行业智能化水平的不断提升，对选煤厂进行智能化升级改造势在必行。为解决龙王沟选煤厂集控系统与停送电系统存在的问题，基于龙王沟选煤厂主选系统生产现状，通过升级集控系统软硬件、增加配电室PLC控制分站并接入原集控系统、新建自动流程化的停送电管理系统、优化智能启停车系统，对龙王沟选煤厂进行了智能化升级改造。改造后，集控系统的不间断监控得到了保证，集控系统CPU访问量降低了30%，软件响应时间从1 s缩短到0.7 s，故障响应时间缩短到5 s内，数据实时处理能力及历史数据归档与维护速度均得到显著提升；实现了高低压配电柜远程停送电、停送电业务自动流程化管理、集控系统“一键启停”、启停车控制参数灵活配置、不同生产方案启停车流程“一键选择”。通过改造，提升了选煤厂智能化水平，完善了集控系统的基础功能，提高了生产与管理效率，降低了电能消耗，为其他选煤厂集控系统与停送电系统的改造提供了有益参考。

With the ever-increasing rise of intelligent level of the coal mining operation, it is imperative to upgrade the intelligent level of coal preparation plants. In order to tackle the problems encountered in Longwanggou Plant′s centralized control system and power supply and cut-off management system, work is made on intelligent upgrading of the systems in line with the current state of the plant′s primary washing system and by taking the following measures: upgrading of both soft ware and hard ware of the centralized control system; adding a PLC-controlled substation in power distribution room and incorporating it into the centralized control system; adding a new automatic streamlined power supply and cut-off management system; and optimization of the intelligent equipment start/stop system. The upgrading work makes it possible for the centralized control system to carry out uninterrupted monitoring and control, and has led to reduced rate of hits of CPU by 30%; cut of software response time from 1 s to 0.7 s, shortening of fault response time to less than 5 s, notable enhancement of real-time data processing capacity and historical data archiving and maintenance speed; the possibility of making remote power supply and cut-off with both high and low-voltage power distribution cabinets under automatic and streamlined management. Moreover, the start/stop of equipment can now be made by pushing one button, and the start/stop control parameters can be determined in a flexible manner; and the equipment start/stop flowsheet can be selected simply through pushing one button to suit the different coal washing operations. The upgrading work has led to rise of intelligent level of the coal preparation plant, perfection of the basic functions of the plant′s centralized control system, improved management efficiency, and reduced power consumption. The upgrading work made at Longwanggou Plant provides a valuable reference for other plants to make similar upgrading work.