XLPE电力电缆接地环流监测方案
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摘要
交联聚乙烯(XLPE)性能稳定,工程质量良好,始终是电力电缆的主要绝缘构成材质。文中根据电缆主绝缘故障较少,而护层和插件层故障层出不穷的工程现状,提出了针对金属护层的一种XLPE接地环流监测方案。旨在电缆护层状态分析的基础上,建立护层感应电势模型,并对常规状态下电压作用、短路、异常进行核算,从而整合推出XLPE接地感应环流电路模型。在此基础上建立接地环流公式,可方便诊断出金属护层的各类损伤、故障及异常接地环流。经过实验测试结果表明,此监测方案可灵敏反应绝缘状况,实时反馈电缆状态。其数据表征稳定,具备极高的研究、开发价值。
cross linked polyethylene(XLPE)has stable performance and good engineering quality. It has always been the main insulation material of power cable. According to the fact that the main insulation fault of cable is less,and the failure situation of sheath and plug-in layer is not poor,a monitoring scheme of XLPE grounding for metal protective layer is put forward. Based on the analysis of cable sheath state,the induction potential model of the sheath is established,and the voltage action,short-circuit and abnormity in the normal state are calculated,so as to integrate the XLPE earth induction loop circuit model. On this basis,the ground circulation formula is established,which can be used to diagnose all kinds of damage,fault and abnormal grounding circulation of metal shield. The circulation comparison test before and after the cable grounding shows that the monitoring scheme can sensitively respond to the insulation condition,real-time feedback the cable state,and represent the data stably,and has high research and development value.
cross linked polyethylene(XLPE)has stable performance and good engineering quality. It has always been the main insulation material of power cable. According to the fact that the main insulation fault of cable is less,and the failure situation of sheath and plug-in layer is not poor,a monitoring scheme of XLPE grounding for metal protective layer is put forward. Based on the analysis of cable sheath state,the induction potential model of the sheath is established,and the voltage action,short-circuit and abnormity in the normal state are calculated,so as to integrate the XLPE earth induction loop circuit model. On this basis,the ground circulation formula is established,which can be used to diagnose all kinds of damage,fault and abnormal grounding circulation of metal shield. The circulation comparison test before and after the cable grounding shows that the monitoring scheme can sensitively respond to the insulation condition,real-time feedback the cable state,and represent the data stably,and has high research and development value.
引文
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[11]章铭杰,周雁.XLPE电力电缆局部放电在线测试的现状与探讨[J].电线电缆,2012(4):35-38.
[12]胡春江,王锋,温定筠,等.XLPE电缆局部放电在线检测技术现状[J].电网技术,2014,38(s1):33-38.
[13]陈瑞龙.XLPE电缆局部放电在线监测系统的研制[D].上海:上海交通大学,2014.
[14]随慧斌,李靖强,杨晓娟,等.XLPE电缆局部放电在线监测系统研究[J].山东大学学报:工学版,2012,42(4):126-131.
[15]宫黛,孙静,孔德武,等.110kV XLPE电缆局部放电在线监测的方向耦合器技术实验研究[J].高压电器,2014(11):51-56.
[16]陈腾彪,邬韬,魏前虎,等.基于三路脉冲信号极性鉴别技术的110kV XLPE电缆局放检测技术[J].电线电缆,2014(1):27-30.
[2] Nakayam T. Online cable monitor developed inJapan[J].IEEE Transactions on Power Delivery,199l,6(4):1359-1365.
[3]张一鸣,钱勇,李嫣然,等.分布式XLPE电缆局部放电在线监测系统的研制[J].电气自动化,2015,37(6):75-77.
[4]喻岩珑,李晟,孙辉,等.XLPE电缆绝缘老化与剩余寿命评估的试验方法[J].电网与清洁能源,2011,27(4):26-29.
[5]张海龙.110~220kV XLPE电缆绝缘在线检测技术研究[D].武汉:武汉大学,2009.
[6]张赞斌.交联聚乙烯电缆局部放电检测方法研究[D].保定:华北电力大学,2010.
[7]徐丙垠,李胜祥,陈宗军.电力电缆故障探测技术[M].北京:机械工业出版社,1999.
[8]张雄伟.DSP芯片的原理与开发应用[M].北京:电子工业出版社,1997.
[9]王念旭.DSP基础与应用系统设计[M].北京:北京航空航天大学出版社,2000.
[10]彭启棕,李玉柏.DSP技术[M].成都:电子科技大学出版社,1997.
[11]章铭杰,周雁.XLPE电力电缆局部放电在线测试的现状与探讨[J].电线电缆,2012(4):35-38.
[12]胡春江,王锋,温定筠,等.XLPE电缆局部放电在线检测技术现状[J].电网技术,2014,38(s1):33-38.
[13]陈瑞龙.XLPE电缆局部放电在线监测系统的研制[D].上海:上海交通大学,2014.
[14]随慧斌,李靖强,杨晓娟,等.XLPE电缆局部放电在线监测系统研究[J].山东大学学报:工学版,2012,42(4):126-131.
[15]宫黛,孙静,孔德武,等.110kV XLPE电缆局部放电在线监测的方向耦合器技术实验研究[J].高压电器,2014(11):51-56.
[16]陈腾彪,邬韬,魏前虎,等.基于三路脉冲信号极性鉴别技术的110kV XLPE电缆局放检测技术[J].电线电缆,2014(1):27-30.