Analysis of power quality based on real data and quality improvement at campus distribution system

被引：1

作者：

Graduate School of Electrical and Electronics Engineering, University of Fukui, 3-9-1, Bunkyo, Fukui 910-8507, Japan ^{[1
]}

不详 ^{[2
]}

不详 ^{[3
]}

机构：

[1] Graduate School of Electrical and Electronics Engineering, University of Fukui, Fukui 910-8507, 3-9-1, Bunkyo

[2] Graduate School of Advanced Science and Engineering, Major in Electrical Engineering and Bioscience, Waseda University, Shinjuku-ku, Tokyo 169-8555, 3-4-1, Ohkubo

[3] Transmission and Distribution Systems Center, Mitsubishi Electric Corporation, Ako 678-0256, 651, Tenwa

来源：

IEEJ Trans. Power Energy | 2009年 / 9卷 / 1115-1122+6期

关键词：

Campus distribution system; Current imbalance rate; Current total harmonic distortion; Power quality; Voltage imbalance rate; Voltage total harmonic distortion; Wide area measurement system;

D O I：

10.1541/ieejpes.129.1115

中图分类号：

学科分类号：

摘要：

In recent years, a lot of equipments have been made using the inverter technology from home electric appliances to office automation apparatuses and industrial equipments with the development of power electronics technology. The voltage distortion of a distribution system has increased due to the harmonic currents generated from these apparatuses, and the increase in harmonics continues to be expected. In addition, the distribution system forms the circuit of harmonic distortion expansion by the prevalence of static capacitor without L for power factor improvement. Moreover, the voltage imbalance occurs by diversification of loads or imbalanced connection of single-phase loads. The deterioration of power quality in the distribution system causes various problems such as the overheating of equipments and malfunction of rotating machines. Since the power quality changes according to air temperature and date, it is desirable to measure the voltages and currents continuously for a long time. In this study, the authors focus attention on the distribution system in the University of Fukui campus, and the authors have measured the voltages and currents in the distribution system for a long period with WAMS (Wide Area Measurement System) using NCT (Network Computing Terminal). Based on the obtained data, the authors analyzed the power quality of the campus distribution system from viewpoints of voltage imbalance, current imbalance, voltage THD (Total Harmonic Distortion), and current THD. Furthermore, the improvement effect of power quality of the campus distribution system by exchange of single-phase load connection is described. © 2009 The Institute of Electrical Engineers of Japan.

引用

页码：1115 / 1122+6

共 6 条

[1]

Yukihira K., Distribution of power quality factors mainly on voltage distortion, The Papers of Joint Technical Meeting on Power Engineering and Power Systems Engineering, pp. 7-10, (2008)

[2]

Wada M., Matsuda K., Watanabe M., Yamazaki S., Measured examples of unbalanced voltages and currents in high voltage distribution system, Annual Conference of Power and Energy Society IEE of Japan, 362, pp. 36-117, (2006)

[3]

Oka K., Motohashi J., Myoga M., Azuma S., Kyomoto S., A protection scheme and a method for keeping a balance of voltage for an 11.4- kV three-phase four-wire distribution system, T. IEE Japan, 122 B, 6, pp. 755-760, (2002)

[4]

Hayashi Y., Matsuki J., Ohashi M., Tada Y., Computation method to improve three-phase voltage imbalance by exchange of single-phase load connection, 1EEJ Trans. PE, 125, 4, pp. 365-372, (2005)

[5]

Watanabe M., Hashiguchi T., Mitani Y., Saeki O., Hojo M., Ukai H., Improvement of the evaluation of the wide area power system stability based on multiple synchronized phasor measurements with observation sites changed, IEEJ Trans. PE, 128, 1, pp. 84-90, (2008)

[6]

Shono T., Maede Y., Sakashita H., Kawasaki T., Sekiguchi K., WAMS: Wide area measurement system applying internet technology, 2003 National Convention Record IEE Japan, 6-71, pp. 115-116, (2003)

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