Comprehensive Hierarchy Evaluation of Power Quality Based on an Incentive Mechanism

In a liberalized electricity market, it is not surprising that different customers require different power quality (PQ) levels at different price. Power quality related to several power disturbances is described by many parameters, so how to define a comprehensive hierarchy evaluation system of power quality (PQCHES) has become a concerned issue. In this paper, based on four electromagnetic compatibility (EMC) levels, the numerical range of each power disturbance is divided into five grades (Grade I –Grade V), and the “barrel principle" of power quality is used for the assessment of overall PQ performance with only one grade indicator. A case study based on actual monitored data of PQ shows that the site PQ grade indicates the electromagnetic environment level and also expresses the characteristics of loads served by the site. The shortest plank principle of PQ barrel is an incentive mechanism, which can combine with the rewards/penalty mechanism (RPM) of consumed energy “on quality demand", to stimulate utilities to improve the overall PQ level and also stimulate end-user more “smart" under the infrastructure of future SmartGrid..

Authors:

• Tao Shun
• Xiao Xiangning
• HadjSaid
• N.

Keywords:

• Power quality
• electromagnetic compatibility
• SmartGrid
• comprehensive evaluation
• barrel principle
• electricitymarket

References:

[1] United States Department of Energy Office of Electric Transmission and
Distribution "GRID 2030" a national vision for electricity-s second 100
years http://www.oe.energy.gov/smartgrid.htm
[2] Compatibility levels in industrial plants for low-frequency conducted
disturbances, IEC 61000-2-4 international standards, Jun. 2002.
[3] M. J. Samotyj, M. M. Wasiluk-Hassa and W. Mielczarski, "Electric
power for the digital age" in Proc.2002 10th International Conf. on
Harmonics and Quality of Power, pp. 276-282.
[4] Yuan Xiaodong, Zhao Jianfeng, Tang Guoqing, and Han Zhengzhong
"Multi-Level Fuzzy Comprehensive Evaluation of Power Quality," in
Proc.2004 IEEE International Conf. on Electric Utility Deregulation,
Restructuring and Power Technologies, 2004. (DRPT 2004), pp.
290-294.
[5] Liu Yingying, Li Guodong, Gu Qiang and Xu Yonghai "Radial Basis
Function Neural Network Based Comprehensive Evaluation for Power
Quality," in PowerCon 2006 on Power System Technology, pp. 1-5.
[6] Pierluigi Caramia, Guido Carpinelli, Paola Verde Power Quality Indices
in Liberalized Markets, New York: Wiley, Aug.2009.
[7] X. Mamo and J. Javerzac, "Power quality indicators," Paper presented at
the IEEE Porto Power Tech, Sep. 2001.
[8] V. J. Gosbell, B. S. P. Perera, and H. M. S. C. Herath, "Unified power
quality index (UPQI) for continuous disturbances" in Proc. 2002 10th
International Conf. on Harmonics and Quality of Power, pp. 316-321.
[9] Math H. J. Bollen, Understanding Power Quality Problems, Voltage
Sags and Interruption, New York: IEEE PRESS, 2000.
[10] Xiao Xiangning, Tao Shun, Bi Tianshu and Xu Yonghai, "Study on
distribution reliability considering voltage sags and acceptable indices,"
IEEE Trans. Power Delivery, Vol.22, pp.1003-1008, Apr. 2007.
[11] Xiao Xiangning, Tao Shun Study on Assessment Model of Event-Type
Power Disturbances ACPCCAS 2008 IEEE International Conference
Macao China Dec.2008
[12] J. Driesen, T. Green, T. V. Craenenbroeck and R. Belmans, "The
development of power quality markets", in Proc. 2002 IEEE PES Winter
Meeting, pp. 262-267.