基于电容补偿无功电源的长距离架空输电线路融冰仿真实验和方案设计  

De-icing scheme and experiment of long distance HV overhead power line based on capacitor compensating reactive current

作　　者：刘刚[1,2] 赵学增[1] 王立辉[3] 彭辉[4] 卜劲松 陈永辉 姜世金[6] 梁岩[6] 刘子军[2] 

机构地区：[1]哈尔滨工业大学机电工程学院,黑龙江哈尔滨150001 [2]鸡西大学电气与信息工程系,黑龙江鸡西158100 [3]东南大学仪器科学与工程学院,江苏南京210096 [4]东京工业大学电气电子工程系 [5]黑龙江省电力公司,黑龙江哈尔滨150001 [6]鸡西电业局,黑龙江鸡西158100

出　　处：《电力系统保护与控制》2011年第19期44-51,72,共9页Power System Protection and Control

基　　金：国家留学基金管理委员会奖学金项目(20083026);黑龙江省电力公司科技项目

摘　　要：长距离架空输电线路存在线路感抗随着线路长度的增加而增大的问题。采用在融冰线路中串联补偿电容器的方法来抵消融冰线路的感抗,以降低融冰线路的总阻抗,保证电容补偿无功电源融冰方法应用于长线路融冰,系统能够提供有效的融冰电流。针对电容补偿无功电源融冰方法存在的电容器端电压升高问题,提出提高电容器对地绝缘水平的方法和采用电容器多组串联分压的方式,用来解决在融冰过程中电容器过电压导致现有10kV电容器额定电压无法满足融冰操作要求的问题。通过低电压模拟电路仿真实验,绘制出线路阻抗电压与末端电容器电压随着线路长度变化的向量关系图,并给出利用10kV电源和10kV电容器对220kV输电线路LGJ400导线融冰的参数计算和具体实施融冰的方案。The inductance of a long distance HV overhead power line increases with the extension of the line. In order to decrease the total impedance of the power line and ensure the system could provide effective de-icing current by using the de-icing method based on capacitor compensation reactive current, the measure of connecting series capacitor banks to the de-icing line for compensating the line inductance is applied. With the capacitor terminal voltage increment by using capacitor compensation de-icing method, a mean of improving the capacitor voltage insulation level to ground and series-mounting multi-group capacitor banks to the de-icing line for partial voltage are proposed to solve the problem that the rated voltage of existing 10 kV capacitor banks can not satisfy the operation requirements, which is caused by capacitor over-voltage during the de-icing process. The voltage vector relationship of capacitor and line impedance with the length of de-icing line variation is given based on the analog low voltage circuit simulation. Furthermore, the specified scheme and calculation for de-icing 220 kV LGJ400 transmission line with utilizing l0 kV capacitor banks supplied by 10 kV power source is proposed.

关 键 词：电力线除冰 电容补偿 无功电源 过电压 220KV输电线路 架空输电线路 10KV并联电容器 

分 类 号：TM75[电气工程—电力系统及自动化]