20kV配电网应用及中性点接地方式研究
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摘要
随着经济发展,采用20kV配电网相比10kV电压等级配电具有越来越多的优越性,如提高电力系统的稳定性、电能质量和运行的经济性能,降低电网的投资等。而在20kV配电网进行建设、升压、改造时,中性点接地方式成为关键技术问题之一,对设备选型、系统运行及继电保护等具有重大的影响。本文首先对采用20kV电压等级的优势与10kV、35kV进行了比较,然后分析和探讨了20kV配电网的中性点不接地、经消弧线圈接地、小电阻接地和灵活接地方式等问题,并提出了相应的建议,最后总结了国内外20kV配电网中性点接地式的现状及发展趋势,以期为将来20kV配电网的广泛使用提供技术参考。
With the economic development, adopting 20 kV distribution network has more and more advantages compared with 10 kV voltage distribution, such as improving the stability of power system, power quality and economy of operation, and reducing the investment of power grid. However, In the 20 kV distribution network to build, boost, transformation, the neutral point grounding has become one of the key technical issues, the equipment selection, system operation and relay protection has a significant impact. In this paper, firstly, the advantages of using 20 kV voltage level are compared with 10 kV and 35 kV. Then, analyzed and discussed the neutral point of 20 kV distribution network is not grounded, grounding through peterson coil; grounding through small resistance; flexible grounding. Finally, the status quo and development trend of neutral point grounding of 20 kV distribution network both at home and abroad are summarized, providing a technical reference for the widespread use of 20 kV distribution network in the future.
With the economic development, adopting 20 kV distribution network has more and more advantages compared with 10 kV voltage distribution, such as improving the stability of power system, power quality and economy of operation, and reducing the investment of power grid. However, In the 20 kV distribution network to build, boost, transformation, the neutral point grounding has become one of the key technical issues, the equipment selection, system operation and relay protection has a significant impact. In this paper, firstly, the advantages of using 20 kV voltage level are compared with 10 kV and 35 kV. Then, analyzed and discussed the neutral point of 20 kV distribution network is not grounded, grounding through peterson coil; grounding through small resistance; flexible grounding. Finally, the status quo and development trend of neutral point grounding of 20 kV distribution network both at home and abroad are summarized, providing a technical reference for the widespread use of 20 kV distribution network in the future.
引文
[1]殷红旭,张建华.我国20kV配电电压等级的历史沿革及应用综述[J].电气技术,2010, 11(6):1-4.
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[11]魏庆海,吕鸣镝,周莉梅,等.配电网采用20kV供电的前景分析[J].电网技术,2008, 32(23):61-66.
[12]徐丙垠,李天友.配电网中性点接地方式若干问题的探讨[J].供用电,2015(6):12-16,29.
[13]刘育权,蔡燕春,邓国豪,等.小电阻接地方式配电系统的运行与保护[J].供用电,2015, 32(6):30-35.
[14]孙九顺.配电网小电流单相接地故障特性及定位技术研究[J].电气技术,2015(5):66-69.
[15]王海民,廖红梅.20kV配电在大连长兴岛地区的应用[J].电力设备,2008, 9(9):24-25.
[16]蔡燕春,张少凡,杨咏梅.20kV花瓣型配电网若干技术问题分析[J].供用电,2016, 1:51-55.
[2]肖东升,陈继军,刘辉.城市中压配电网采用20kV电压等级的分析[J].广东电力,2010, 23(1):16-19.
[3]范明天.中国配电网面临的新形势及其发展思路[J].供用电,2013, 30(1):1-5.
[4]汪超,吴国梁,葛夕武.20kV配电系统的探索与实践[J].华东电力,2010, 38(3):381-383.
[5]方旭东,李智.20kV配电网优越性及现实建设中存在问题的探讨[J].电气开关,2010, 48(5):13-14, 17.
[6]崔凯,孔祥玉,于慧芳.法国配电网规划方法研究及相关启示[J].供用电,2014(8):58-61.
[7]杨帅,王双杰.含有分布式电源电网的故障特性影响因素分析[J].电气技术,2015, 16(4):22-25, 38.
[8]胡大建.10kV和20kV开关柜技术与经济分析[J].电工电气,2009, 10:1-3.
[9]李红军,宋毅,杨卫红,等.中压配电网升压改造的综合评估方法[J].供用电,2014(2):60-62.
[10]殷红旭,张建华.20kV中压配电在城市高负荷密度新区中的应用[J].现代电力,2010, 27(2):35-38.
[11]魏庆海,吕鸣镝,周莉梅,等.配电网采用20kV供电的前景分析[J].电网技术,2008, 32(23):61-66.
[12]徐丙垠,李天友.配电网中性点接地方式若干问题的探讨[J].供用电,2015(6):12-16,29.
[13]刘育权,蔡燕春,邓国豪,等.小电阻接地方式配电系统的运行与保护[J].供用电,2015, 32(6):30-35.
[14]孙九顺.配电网小电流单相接地故障特性及定位技术研究[J].电气技术,2015(5):66-69.
[15]王海民,廖红梅.20kV配电在大连长兴岛地区的应用[J].电力设备,2008, 9(9):24-25.
[16]蔡燕春,张少凡,杨咏梅.20kV花瓣型配电网若干技术问题分析[J].供用电,2016, 1:51-55.