Development of Power Quality Index Using Ideal Analytic Hierarchy Process
This paper presents a new power quality index using Ideal Analytic Hierarchy Process(Ideal AHP). This methodology has three states such as IDEAL, ACTUAL, and POSSIBLE states. Here, IDEAL state reflects that customer feel enough for its quality, and POSSIB
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Abstract&This paper presents a new power quality index using Ideal Analytic Hierarchy Process(Ideal AHP). This methodology has three states such as IDEAL, ACTUAL, and POSSIBLE states. Here, IDEAL state reflects that customer feel enough for its quality, and POSSIBLE state reflects that customer feel extremely challenging because of its quality, and ACTUAL state reflects the actual quality. This Ideal AHP can obtain absolute value of competitiveness of each case, and can provide an overall assessment of distribution performance. One of the biggest merit of the method is to calculate only one time for each case. In case of addition, an operator need a calculation for the case. This paper apply the method to power quality of distribution system, and obtain a unified power quality index. By applying it to a distribution system, usefulness of the method was verified. Keywords Unified power quality index · Ideal Analytic Hierarchy Process · Reliability · Power quality · Distribution system
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Introduction
Reliability and Power Quality(PQ) of electricity is so important that power companies expend significant capital and efforts to increase reliability and PQ of their system. Power companies and Customers want reliability and PQ assessment methodology, societies including IEEE developed quantitative assessment methodologies, such as indices for reliability[1], indices for voltage sags[2,3], and indices for harmonics[4]. These indices can assess reliability and PQ at existing each load point and overall distribution system. Because these methodologies need measurement of PQ at every load point, assessment of indices for non-existing B. Lee · D. Sohn · K.M. Kim() Department of Electrical and Semiconductor Engineering, Chonnam National University, 50, Daehak-ro, Yeosu, Jeollanam-do 59626, Korea e-mail: {buhmlee,kkm}@chonnam.ac.kr, [email protected] © Springer Science+Business Media Singapore 2016 K.J. Kim and N. Joukov (eds.), Information Science and Applications (ICISA) 2016, Lecture Notes in Electrical Engineering 376, DOI: 10.1007/978-981-10-0557-2_75
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Buhm Lee, Dohee Sohn and Kyoung Min Kim
distribution system, i.e. systems in the planning stage is not possible. Additionally, these indices can show limited information for a distribution system, because these indices reflect a certain viewpoint. First, methodology[5] based on probability was developed, so assessment of reliability of load point and its indices for non-existing distribution system is possible. Additionally, by using similar manner, calculation of voltage sags, harmonics, and their indices for non-existing system is possible. Second, methodology[6] which can obtain a single PQ index by unifying reliability and PQ indices using Analytic Hierarchy Process(AHP)[7,8]. This methodology can obtain a single index with AHP limitations. Main difficulty of the methodology[6] is that can obtain an unified index when all alternatives has prepared, because AHP can obtain eigenvalues as competitiveness among all alternatives. Unified index obtain procedure
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