电缆回收方式对综采工作面远距离供电影响分析

电缆执行回收操作会造成自身结构形变,因回收方式不同,呈现出卷、盘、弯曲等不同的形变状态,造成电缆分布参数存在差异,从而对远距离供电中干线压损产生影响。现有电缆分布参数的解析计算存在实现流程复杂、分布参数的提取精度受限且不适用电缆回收过程中的大形变问题。针对上述问题,结合单轨吊、电缆车的工作原理,提出了利用ANSYS分析电缆在回收过程中分布参数变化的方法。分析了电缆车回收方式和单轨吊回收方式对电缆分布参数和散热的影响;利用ETAP仿真分析了电缆回收方式对综采工作面远距离供电的影响。分析结果表明:电缆执行回收操作造成卷、盘、弯曲变形导致电容值、电导值和电阻值小幅变化,电感值大幅减小;采用单轨吊回收方式时,电缆变形程度更大,单位长度电感值更小,降幅高达29%;对比于电缆车回收方式,单轨吊回收方式在自动化程度、电缆散热及干线压损方面更具优势;电缆分布参数的变化导致干线压损有所改变,随着电缆回收距离的增加,远距离供电系统各干线总压损整体呈下降趋势,局部呈上升趋势,进而影响最远供电距离和设备带载能力。

Analysis of the influence of cable recovery method on long-distance power supply of fully mechanized working face

The cable recovery operation will cause the cable structural deformation.Due to different recovery methods,there are different deformation states such as coil,reel and bending.Theses states cause differences in cable distribution parameters,which have influences on the main line voltage loss in long-distance power supply.The problems of existing analytical calculation of cable distribution parameters are complicated implementation process,limited extraction accuracy of distribution parameters and not being applicable to large deformation in the cable recovery process.In order to solve the above problems,this paper proposes a method to analyze the changes of cable distribution parameters in the process of cable recovery by using ANSYS and the working principle of monorail crane and cable car.The influence of cable car recovery method and monorail crane recovery method on cable distribution parameters and heat dissipation is analyzed.The influence of the cable recovery method on the long-distance power supply of the fully mechanized working face is analyzed by using ETAP.The analysis results show that the coil,reel,and bending deformation of the cable caused by the recovery operation will cause small changes in the capacitance value,the conductance value and the resistance value,and cause significant reduction of the inductance value.When the monorail recovery method is adopted,the cable deformation is greater and the inductance value per unit length is smaller with a drop of up to 29%.Compared with the cable car recovery method,the monorail crane recovery method has more advantages in terms of automation,cable heat dissipation and main line voltage loss.The changes in cable distribution parameters lead to changes in main line voltage loss.With the increase in cable recovery distance,the total voltage loss of each main line of the long-distance power supply system shows a decreasing trend as a whole.There is an increase in some parts of the main line,which influences the longest power supply distance and equipment carrying capacity.