Analysis And Treatment Of Power Quality For Coal Mine

As the scale of the mining enterprises gradually expand and update of the application of new technology,coal mine more and more high degree of automation,belt conveyor is heading for a long span,high power,high speed,high stability,development and its automation system reliability requirements more and more is also high.New requirements for the length,power,stability and energy saving of belt conveyor are put forward.The electric design and control concept of belt conveyor is also developing.This paper will discuss and analyze the electrical and control problems of the long-distance large-capacity belt conveyor based on practical engineering.It is usually used to drive a large belt conveyor with multi-drum and multi-motor,and there are some problems with the multi-drum and multi-motor drive.For example,due to the change of load during the start and stop of the conveyor belt,the sudden change of the conveyor belt tension,and the power imbalance in the starting and running process of the conveyor belt driving device.This problem will produce a series of serious consequences,a motor overload or over current fault,serious will cause the motor or roller,conveyor belt broke,broken shaft body deformation,tension device to pull over and other accidents,threatens the safety of site equipment and staff.China’s electricity and coal regulators attach great importance to this issue.Therefore,the design of electric control of large belt conveyor with long distance and large volume should solve the following two key problems:1.The start-up of belt conveyor.2.Output power balance of each driving motor of belt conveyor Ensure the belt conveyor is more stable,efficient,safe and stable operation.Thesis mainly with coal group north xin kiln raw coal mine main inclined shaft driving room upgrade drive belt conveyor and electrical control system design,on the basis of the stability of the automatic control system of belt conveyor,to carries on the discussion and research.Based on the method of combining the theoretical analysis and engineering practice,the research analyzed the coal mine main belt inclined combined with the working state of the...