Influences of circuit parameters of capacitor voltage transformer on grid harmonic voltage measurements

被引：0
作者：
机构：
[1] China Electric Power Research Institute, Wuhan , 430074 , Hubei Province
来源：
Feng, Yu | 1600年 / Chinese Society for Electrical Engineering卷 / 34期
关键词：
Capacitor voltage transformers (CVT); Cascade classification analysis; Damper parameters; Equivalent stray capacitors; Harmonic voltage measurements;
D O I：
10.13334/j.0258-8013.pcsee.2014.28.025
中图分类号：
学科分类号：
摘要：
The capacitor voltage transformers (CVT) are widely used in China for most of power grids above 66 kV. The rules of harmonic transfer characteristics of CVTs are still unknown so that the measurement of harmonic voltage is hard to operate. This paper demonstrated that CVT can be equivalent to a linear circuit in harmonic conditions, and a kind of cascade classification method was proposed based on that property. The method was useful to get the impact rules between CVT circuit parameters and its harmonic transfer characteristics. The simulation results show that equivalent stray capacitance of the primary side of intermediate transformers can cause some kinds of enlargement of CVTs amplitude-frequency characteristics at a frequency above 1 kHz, damper parameters can affect the rate of frequency characteristics. Besides that, influence of parameter changes such as 1 to 10 times of rated load and 0.1 to 1 times of rated magnetizing impedance of intermediate transformers can be ignored for frequency characteristics of CVTs. Overall, the conclusions are very useful for CVT product design and application in harmonic voltage measurements. ©2014 Chinese Society for Electrical Engineering
引用
收藏
页码：4968 / 4975
页数：7
相关论文
共 27 条
  • [1] Feng Y., Tang Y., Wu X., Parameter estimation method of power quality disturbances based on electrical parameters analysis, Proceedings of the CSEE, 29, 16, pp. 100-107, (2009)
  • [2] Lin H., Principal control methods of harmonic level in power system, Power System Technology, 34, 12, pp. 68-73, (2010)
  • [3] Guo W., Xu D., Wu J., Et al., Novel control method for LCL active power filter, Proceedings of the CSEE, 30, 3, pp. 42-48, (2010)
  • [4] Liu Y., Li H., Ye G., Et al., Principle, Technology and Application of Electronic Instrument Transformer, pp. 129-139, (2009)
  • [5] Li H., Research on electronic voltage transformer based on capacitive voltage divider, (2011)
  • [6] Li B., Chen W., Li G., Analysis on affects of harmonic on active energy metering devices, Power System Technology, 34, 6, pp. 154-159, (2010)
  • [7] Quality of electric energy supply-harmonics in public supply network, (2008)
  • [8] Zhao W., Tu C., Luo A., Et al., A novel single-phase hybrid active power filter applied to electrical railway system, Proceedings of the CSEE, 28, 21, pp. 51-56, (2008)
  • [9] Yu K., Zhou S., Wang T., Et al., Electric Railway Power Supply and Power Quality, pp. 7-33, (2011)
  • [10] Case Collection of Power Quality Testing Evaluation and Solutions, pp. 8-59, (2009)
123