|
|
|
| The Affect of Error of Current Transformer with Harmonics |
| Feng Hao |
| Sinosteel Corporation Wuhan Safety & Environmental Protection Research Institute, Wuhan 430081 |
|
|
|
|
Abstract The current transformer (CT) has been taken as the example. First, take the independent power frequency current source and harmonics current source through the CT. Then, take the singles of the secondary output of CT into the measurement system which can analysis the error of CT with harmonics interference. According to the data of validate test it can be seem that harmonics will accelerate the core saturation of CT. In this process, the ratio error will offset to negative direction and phase error will offset to positive direction. Furthermore, it can also be found that the 3rd harmonic will lead the most serious affect to CT. In filter area, the ultracystallite material is superior to silicon materials. This result is contributed to select appropriate CT in power system which may effect by harmonics.
|
|
Received: 18 August 2015
Published: 18 August 2015
|
|
|
|
[1] Yazdani-Asrami M, Mirzaie M. Amir abbas shayegani akmal.investigation on impact of current harmonic contents on the distribution transformer losses and remaining Life[J]. IEEE International Conference on Power and Energy, 2010, 29(1): 689-694.
[2] Elmoudi A, Lehtonen M, Nordman H. Effect of harmonics on transformers loss of Life[C]//Conference Record of the 2006 IEEE International Symposium on Electrical Insulation, 2006: 408-411.
[3] 肖雁鸿, 毛筱, 周靖林, 等. 电力系统谐波测量方法综述[J]. 电网技术, 2002, 26(6): 61-64.
[4] Cataliotti A, Di Carad, Emanuel A E, et al. Current transformers effects on the measurement of harmonic active power in LV and MV networks[J]. Power Delivery, IEEE Transactions on, 2011, 26(1): 360-368.
[5] Cataliotti. A, Di Cara. D, Emanuel. A. E, et al. Characterization of Current Transformers in the Presence of Harmonic Distortion [J]. Instrumentation and Measurement Technology Conference Proceedings, 2008. IMTC 2008. IEEE. 2008: 2074-2078.
[6] 于淼, 张炳达. 配电网中谐波源检测方法的研究[J]. 电力系统及其自动化学报, 2005, 17(1): 36-40, 87.
[7] Zhang Zhi, Li Hong-bin. An accurate system for onsit calibration of electronic transformers with digital output [J]. Review of Scientific Instrument, 2012, 83(6): 065111-065111-7.
[8] 曹团结, 张剑, 尹项根, 等. 电流互感器的误差分析与工程计算[J]. 电力自动化设备, 2007, 27(1): 53-56.
[9] 李长云, 李庆民, 李贞, 等. 直流偏磁条件下电流互感器的传变特性[J]. 中国电机工程学报, 2010, 30(19): 127-131.
[10] 李春来, 汤晓宇, 黄业安, 等. 计量用TA在直流偏磁条件下传变特性的实验与分析[J]. 电力自动化设备, 2011, 31(7): 143-145,149. |
|
|
|
2015, Vol. 16 
