|
|
|
| Application of Grounding Mode and Grounding Conductor for Power Transformer Neutral Point in 500kV Hub Substation |
| Zeng Yong1, Yang Yongjian2 |
1. Guangdong Electric Power Design Institute Co., Ltd, China Energy Engineering Group, Guangzhou 510663;
2. Zhongshan Power Supply Bureau of Guangdong Power Grid Company, Zhongshan, Guangdong 528400 |
|
|
|
|
Abstract The grounding requirements of neutral point of 500kV power transformer are summarized in the paper. According to different characteristics of grounding mode and grounding conductor for power transformer neutral point in 500kV power transformer, the grounding mode works by solidly grounding or low-reactance grounding in AC short circuit conditions of main transformer or the gird, and quickly switch to DC-blocking device grounding in main transformer DC bias. Based on the characteristics of the neutral grounding operation mode, calculate grounding conductor for neutral point of power transformer, finally illustrate the selection and application in a project.
|
|
Published: 06 December 2017
|
|
|
|
| Cite this article: |
|
Zeng Yong,Yang Yongjian. Application of Grounding Mode and Grounding Conductor for Power Transformer Neutral Point in 500kV Hub Substation[J]. Electrical Engineering, 2017, 18(11): 117-120.
|
|
|
|
| URL: |
|
http://dqjs.cesmedia.cn/EN/Y2017/V18/I11/117
|
[1] GB 50065—2011. 交流电气装置的接地设计规范[S].
[2] GB 50064—2014. 交流电气装置的过电压保护和绝缘配合设计规范[S].
[3] GB 1094.3—2003. 电力变压器 第3部分：绝缘水平、绝缘试验和外绝缘空气间隙[S].
[4] 余建国, 晁剑, 钱海. 天广直流输电工程极1单极运行强迫停运故障原因分析和改进措施[J]. 电网技术, 2002, 26(5): 80-83.
[5] 钟连宏, 陆培均, 仇志成, 等. 直流接地极电流对中性点直接接地变压器影响[J]. 高电压技术, 2003, 29(8): 12-13, 28.
[6] 朱艺颖, 蒋卫平, 曾昭华, 等. 抑制变压器中性点直流电流侧措施研究[J]. 中国电机工程学报, 2005, 25(13): 1-7.
[7] 钱中阳, 冯志文. 李建云变压器低压侧中性点接地导体截面的选择[J]. 建筑电气, 2009, 28(12): 38-42.
[8] DL/T 5352—2006. 高压配电装置设计技术规定[S].
[9] 水利电力部西北电力设计院. 电力工程电气设计手册: 电气一次部分[M]. 北京: 中国电力出版社, 1989.
[10] GB 50217—2007. 电力工程电缆设计规范[S]. |
| [1] |
. [J]. Electrical Engineering, 2013, 14(08): 89-91. |
|
|
|
|
2017, Vol. 18 
