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抗直流偏磁的变压器中性点接地方式探讨

DOI: 10.13336/j.1003-6520.hve.2015.03.013, PP. 794-799

Keywords: 直流偏磁,中性点接线方式,噪声,零序电流保护,灵敏度校核,变压器

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Abstract:

直流偏磁现象将影响变压器的正常运行,变压器承受直流偏磁的能力是电力系统稳定运行的前提。为此,建立宜昌地区变压器中性点直流电流分布模型,根据变压器噪声限值,确定变压器中性点电流的最大值,据此提出一种抑制直流偏磁的中性点优化接线方式配置。并且基于宜昌地区RelayCAC模型,对优化后零序电流保护的灵敏度进行了校核。仿真结果显示,通过使同一变电站内投运的两台变电站同时接地,每一台变压器中性点通过的电流均能降低至限值以下,同时,RelayCAC仿真结果验证了中性点接地方式调整后,各线路零序保护的灵敏度出现了一定程度的变化,但均满足灵敏度要求。

References

[1]  李兴源. 高压直流输电系统[M]. 北京:科学出版社,2010:165-167. LI Xingyuan. HVDC transmission system[M]. Beijing, China: Science Press, 2010: 165-167.
[2]  陈青恒,马宏彬,何金良. 直流偏磁引起的500 kV电力变压器振动和噪声的现场测量与分析[J]. 高压电器,2009,45(3):93-96. CHEN Qingheng, MA Hongbin, HE Jinliang. Field monitoring and analysis on vibration and noise of 500 kV electrical transformer under DC current biasing[J]. High Voltage Apparatus, 2009, 45(3): 93-96.
[3]  梅桂华,梁文进,刘艳村,等. 变压器直流偏磁电流阻容抑制装置的开发应用[J]. 高电压技术,2009,35(10):2581-2585. MEI Guihua, LIANG Wenjin, LIU Yancun, et al. Development of the DC current blocking device in capacitor-resistor for transformer[J]. High Voltage Engineering, 2009, 35(10): 2581-2585.
[4]  黄 敏,郭倩雯,童重立,等. 直流偏磁增大换相失败风险的机理分析及仿真[J]. 华中科技大学学报:自然科学版,2014,42(9):102-106. HUANG Min, GUO Qianwen, Tong Chongli, et al. Mechanism analysis of UHVDC DC-bias increasing the risk of commutation failure[J]. Huazhong University of Science & Technology (Natural Science Edition), 2014, 42(9): 102-106.
[5]  于永军,杨 琪,侯志远,等. 天中直流工程入地电流对新疆哈密地区交流电网的影响[J]. 电网技术,2014,38(8):2298-2303. YU Yongjun, YANG Qi, HOU Zhiyuan, et al. Influence of grounding current in UHVDC transmission project from Tianshan to Zhongzhou on Hami AC power system in Xinjiang Uygur Autonomous Region[J]. Power System Technology, 2014, 38(8): 2298-2303.
[6]  潘卓洪,张 露,林进弟,等. 多层水平土壤对交流电网直流分布的影响[J]. 高电压技术,2012,38(4):855-862. PAN Zhuohong, ZHANG Lu, LIN Jindi, et al. Influence of horizontal multi-layer soil on DC current distribution in AC power grid[J]. High Voltage Engineering, 2012, 38(4): 855-862.
[7]  王 升. HVDC地电流对变压器的影响及其抑制措施[D]. 武汉:华中科技大学,2010:63-65. WANG Sheng. Influence of HVDC ground electrode current on grounding transformer and its restraining measure[D]. Wuhan, China: Huazhong University of Science and Tecnology, 2010: 63-65.
[8]  任志超,吴广宁,甄 威,等. 直流入地电流经交流电网分流计算模型的简化及算法分析[J]. 高电压技术,2011,37(4):1008-1014. REN Zhichao, WU Guangning, ZHEN Wei, et al. Model simplification and calculation method analysis about the shunt of dc grounding current via AC grid[J]. High Voltage Engineering, 2011, 37(4): 1008- 1014.
[9]  李长云,李庆民,李 贞,等. 半岛地质条件下计算高压直流输电地中直流分布的扩展镜像法[J]. 高电压技术,2011,37(2):444-452. LI Changyun, LI Qingmin, LI Zhen, et al. Extended image method to determine the underground dc current distribution of HVDC transmission systems under peninsula geological conditions[J]. High Voltage Engineering, 2011, 37(2):444-452.
[10]  杨永明,刘行谋,陈 涛,等.特高压直流输电接地极附近的土壤结构对变压器直流偏磁的影响[J]. 电网技术,2012,36(7):26-32. YANG Yongming, LIU Xingmou, CHEN Tao, et al. Impact of soil structure adjacent to ground electrodes of UHVDC power transmission lines on DC bias of power transformers [J]. Power System Technology, 2012, 36(7): 26-32.
[11]  Jose E T V, Carlos M P. Calculation of electric field and potential distributions into soil and air media for a ground electrode of a HVDC system[J]. IEEE transactions on power delivery, 2003, 18(3): 867-873.
[12]  Price P R. Geomagnetically induced current effects on transformers[J]. IEEE Transactions on Power Delivery, 2002, 17(4): 1002-1008.
[13]  Dawalibi F P, LI Changyi, LI Yexu. Mitigation of transformer saturation due to neutral HVDC current[C]∥IEEE Transmission and Distribution Conference and Exhibition. Dalian, China: IEEE, 2005: 1-6.
[14]  于化鹏,陈水明,杨鹏程,等. 220kV变压器中性点经小电抗接地方式[J]. 电网技术,2011,35(1):146-151. YU Huapeng, CHEN Shuiming, YANG Pengcheng, et al. Neutral grounding via small reactance for 220 kV power transformers[J]. Power System Technology, 2011, 35(1): 146-151.
[15]  李长云,李庆民,李 贞,等. 电能质量约束下变压器承受直流偏磁能力的分析[J]. 高电压技术,2010,36(12):3112-3118. LI Changyun, LI Qingmin, LI Zhen, et al. Analysis on the withstanding ability of power transformer to DC bias under power quality constrain[J]. High Voltage Engineering, 2010, 36(12): 3112-3118.
[16]  ZENG Rong, YU Zhanqing, HE Jinliang, et al . Study on restraining DC neutral current of transformer during HVDC monopolar operation[J]. IEEE Transactions on Power Delivery, 2001, 26(4): 2785-2791.

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