Design and Analysis of Insulation Structure of ±800 kV Valve Side Converter Transformer Bushing

被引：0
|
作者：
Zhang S. [1 ]
Peng Z. [2 ]
机构：
[1] State Grid Chongqing Electric Power Company Chongqing Electric Power Research Institute, Chongqing
[2] State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an
来源：
Gaodianya Jishu/High Voltage Engineering | 2019年 / 45卷 / 07期
关键词：
Capacitance structure; External insulation; Finite element method(FEM); Hollow composite insulator; ±800 kV converter transformer bushing;
D O I：
10.13336/j.1003-6520.hve.20190628014
中图分类号：
学科分类号：
摘要：
A ±800 kV high voltage capacitor filled SF6 gas bushing is an important device to realize the electrical connection between a converter transformer and a valve tower. We mainly analyzed the design of the external and internal insulation structure, and discussed the actual operating environment and the characteristics of the voltage and current waveform of converter transformer bushing. Moreover, we designed and analyzed the hollow composite insulator, corona ring and tail end of the bushing. The main insulation structure of bushing was designed by the equal margin method, and simulation and analysis of the multi-physical field were performed by FEM. Meanwhile, a three-dimensional electric field simulation model was set up to calculate and analyze the external insulation performance of the bushing. The results show that the main insulation of the bushing is fit to the capacitance structure, the maximum axial field strength of the bushing is 0.62 kV•mm-1, the hot-spot temperature under the rated operating condition is 85 degree centigrade, and the end of the bushing should be equipped with apple-type corona ring. The insulation distance of the hollow composite insulator is designed as 7 490 mm. The insulation distance of the bushing tail is designed as 3 110 mm. The results can provide a theoretical basis for the design of the external insulation of the converter transformer bushing used in HVDC transmission projects. © 2019, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：2257 / 2266
页数：9
相关论文
共 20 条
  • [1] Liang X., Zhang P., Chang Y., Recent advances in high-voltage direct-current power transmission and its developing potential, Power System Technology, 36, 4, pp. 1-9, (2012)
  • [2] Xie H., Electrical Insulation Design Principles, (1992)
  • [3] Li P., Gu C., Chen D., Et al., Development of technologies in ±1500 kV UHVDC transmission research, High Voltage Engineering, 43, 10, pp. 3139-3148, (2017)
  • [4] Zhang X., Tan J., Niu W., Bushings design of converter transformer's valve side of UHVDC transmission project, High Voltage Engineering, 38, 2, pp. 393-399, (2012)
  • [5] Zhang S., Peng Z., Wu H., Analysis on power loss of valve-side RIP bushing for ±800 kV converter transformer, Power System Technology, 38, 7, pp. 1758-1764, (2014)
  • [6] Lin X., Wen M., Shen W., Et al., Analysis on insulation property of converter transformer bushing under complex voltage, High Voltage Apparatus, 51, 4, pp. 1-6, (2015)
  • [7] Chen Z., Wu H., Huang H., Et al., Cause analysis and improvement measure of ±800 kV DC wall bushing occurring flashover during overvoltage withstand test, High Voltage Engineering, 37, 9, pp. 2133-2139, (2011)
  • [8] Hosokawa M., Okumura K., Yamagiwa T., Et al., Dielectric performance of improved gas insulated bushing for UHV GIS, IEEE Transaction on Power Delivery, 2, 2, pp. 359-366, (1987)
  • [9] Nie D.X., Zhang H.L., Chen Z., Et al., Optimization design of grading ring and electrical field analysis of 800 kV UHVDC wall bushing, IEEE Transaction on Dielectrics and Electrical Insulation, 20, 4, pp. 1361-1368, (2013)
  • [10] Wang J., Peng Z., Liu P., Et al., Analysis of electric field on the surface of grading and shielding fittings inside ±1100 kV ultra-high voltage converter valve hall, High Voltage Engineering, 41, 11, pp. 3728-3736, (2015)
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