煤矿电网三相五柱式消弧线圈改进型调谐方法  

Improved tuning method of arc suppression coil with three phases and five columns in coal mine power grid

作　　者：侯文宝[1,2] 李德路[1] 罗艳芳[3] 李波 

机构地区：[1]江苏建筑职业技术学院建筑设备与市政工程学院,江苏徐州221116 [2]江苏省建筑节能工程技术研究中心,江苏徐州221116 [3]中国矿业大学信息与电气工程学院,江苏徐州221008 [4]天地(常州)自动化股份有限公司,江苏常州213015

出　　处：《工矿自动化》2015年第4期90-93,共4页Journal Of Mine Automation

基　　金：国家自然科学基金资助项目(51107143);江苏建筑职业技术学院校级课题资助项目(JYA14-16)

摘　　要：针对煤矿电网中三相五柱式消弧线圈采用谐振法调谐时存在谐振点难以确定导致电容电流测量存在误差的问题,提出了一种改进型调谐方法。根据调谐过程中阻尼率不变、脱谐度改变的特点,以总对地电导为导纳三角形固定边,可变总对地电纳和总对地导纳作为导纳三角形可变边,利用导纳角的变化计算电容电流。仿真与实验结果表明,改进型调谐方法较谐振法测量精度更高,且测量误差随着阻尼率的增大而减小。For problem that resonance point is difficult to determined which lead to measuring error of capacitive current when arc suppression coil with three phases and five columns in coal mine power grid is tuned by use of resonance method, an improved tuning method was proposed. Admittance triangle composed by fixed side of edge-to-ground conductance and variable sides of edge-to-ground susceptance and admittance according to characteristics of damping ratio unchanged and out-of-resonance degree changed in tuning process. Capacitance current is calculated according to change of admittance angle. The simulation and experimental results show that the improved tuning method has higher measuring accuracy than the resonance method, and measuring error decreases with increase of damping ratio.

关 键 词：煤矿电网 三相五柱式消弧线圈 谐振法 电容电流 阻尼率 导纳角 

分 类 号：TD611[矿业工程—矿山机电]