何常根.新疆输电线路在线监测设备供电可靠性研究[J].电子测量技术,2019,42(10):12-15
新疆输电线路在线监测设备供电可靠性研究
Research on reliability of power system for transmission line online monitoring device
  
DOI:
中文关键词:  极低温  地线取能  供电可靠性  保温性能
英文关键词:extremely cold environment  power tapping from OPGW  stable power supply  thermal insulation properties
基金项目:新疆电力公司科技项目(5230DK17000H)资助
作者单位
何常根 国网新疆电力有限公司 乌鲁木齐 830063 
AuthorInstitution
He Changgen State Grid Xinjiang Electric Power Co., Ltd., Urumqi 830063, China 
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中文摘要:
      新疆输电线路在线监测装置在极寒环境下无法正常工作,为输电线路运维带来了一定的困难。为些提出了OPGW感应取能的实施方案,基于EMTP仿真平台建立了500 kV交流输电线路模型,仿真计算了地线感应电压和感应电流,并提出了双重保温方式。研究表明:地线感应电压和感应电流与档距、负荷功率正相关,基本不受土壤电阻率的影响;在档距为300 m,负荷功率为500 MW,地线取能装置的输出功率为137.8 W,完全满足输电线路在线监测装置的供电需求;在-45 ℃的长期极寒温度条件下,采用硅质纳米多孔保温层和红外线辐射膜加热的双重保温方式,仍能保证不低于-30 ℃的理想温度条件;供电电源采用保温措施后,在线监测装置平均无故障率由85.9%提高至99.6%,可靠性明显增加。研究结果为极寒地区输电线路在线监测装置提供了稳定供电的设计思路。
英文摘要:
      The on-line monitoring device of transmission line in Xinjiang Province cannot work normally in the extremely cold environment, which brings some difficulties to the operation and maintenance of transmission line. In this paper, the implementation scheme of power tapping from OPGW was put forward. Based on EMTP simulation platform, 500 kV ac transmission line model was established, which simulated the induced voltage and current, and the dual insulation mode is proposed. The results prove that the induced voltage and current of ground wire are positively correlated with the spacing and load power, and are basically unaffected by the soil resistivity; when the span is 300 m and the load power is 500 MW, the output power of the ground wire energy-collecting device is 137.8 W, fully meeting the power supply demand of on-line monitoring device in the transmission line; under the condition of long-term extremely cold temperature -45 ℃, by using nano porous silica insulation membrane and infrared radiation heating, it still can ensure ideal temperature conditions,which is not less than -30 ℃; after the insulation measures are adopted for the power supply, the mean rate of no failure in online monitoring device is increased from 85.9 to 99.6%, and the reliability is significantly increased. The research results provide a design idea of stable power supply for on-line monitoring devices in extremely cold regions.
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