• Title/Summary/Keyword: Power Quality Cost

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Power Quality Index and Cost based on Load-Voltage Characteristics (부하의 전압특성을 고려한 모선별 전력품질 지표 및 가격 산정기법)

  • 이근준
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.52 no.4
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    • pp.213-218
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    • 2003
  • In front of the opening of electric distribution market in 2004, it is indispensable to have a proper estimation of power quality index and rower quality cost calculation mechanism which are indispensable to stabilize highly industrialized society and to vitalize the Investment lot electric power system. However, there were not enough measures to reflect the voltage characteristics such as voltage sags and Interruptions which make electric load in unstable operation. This paper suggests power quality index and power quality cost which translate various kinds of voltage records into bus load drop index(BLDI) and bus power quality cost(BPQC) based on aggregated load CBEMA curve. A sample calculation result shows that this method can produces the acceptable power Quality index and costs for utilities and customers requirements.

Assessment of Quality Management Activities in Power Industries (전력산업에서의 품질경영활동의 평가척도)

  • 정영배
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.24 no.63
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    • pp.89-99
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    • 2001
  • This paper proposes assessment of quality management activities based on cost of quality. Cost of quality is considered prevention cost, appraisal cost, internal failure cost, external failure cost in this paper. This paper shows quality cost magement system in thermal power site devision according to activity analysis. Cost of quality in power industries provides a valuable method of both proving the need for improvement and giving a starting point for projects.

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A Model for Power Quality Control Mechanism for Electric Power Market (전력시장체제하에서의 전력품질제어 메커니즘에 대한 모델링)

  • 이근준
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.52 no.7
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    • pp.381-386
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    • 2003
  • To provide a specified power quality under electric market system is becoming an important issue for customers and utility company. However, there is no realistic infra-structure to design a power system for the specified power quality. Present electric market is operating under the economic point of view. The low power price could be attractive, but the effect of low price could result the lower power quality for the long time and threat power system security. This paper presents a model which conceptualize the dynamic power quality control mechanism to minimize total cost of a society which is affected electric power quality. This model aims to produce a basic infra-structure to balance cost and quality under the electric market system.

Bus Power Quality Index and Cost based on Load-Voltage Characteristics (부하의 전압특성을 고려한 모선별 전력품질 지표 및 가격 산정기법)

  • Lee, Geun-Joon;Heydt, G.T.
    • Proceedings of the KIEE Conference
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    • 2002.11b
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    • pp.9-14
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    • 2002
  • In front of the opening of electric distribution market in 2004. it is indispensable to have a proper estimation of power quality index and power quality cost calculation mechanism are indispensable to stabilize highly industrialized society and to vitalize the investment for electric power system. However, there were not enough measures to reflect the voltage characteristics such as voltage sags and interruptions which make electric load in unstable operation. This paper suggests power quality index(LDI) and power quality cost(LDC) which translate various kinds of voltage records into load drop index and cost based on aggregated load CBEMA curve. A sample calculation result shows that this method can produces the acceptable power quality index and costs for utilities and customers requirements.

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A Research on the Development of Quality Cost Management System for Power Industry (발전산업의 품질비용 관리체계 구축에 관한 연구)

  • Lee, Myong Chang;Hwang, Bong Sun;Park, Sang Jun;Kim, Min Gyu;Kim, Dong Chun;Shin, Wan Seon
    • Journal of Korean Society for Quality Management
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    • v.44 no.4
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    • pp.713-733
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    • 2016
  • Purpose: The primary objective of this case study is to establish a COQ(Cost of Quality) management system for power generation industries. Key topics of this study include collecting COQ elements, their classifications, COQ computation formula, and determining COQ improvement projects. Results: A comprehensive set of COQ elements have been isolated for electric power generation companies. The COQ elements were classified in such a way that they could be managed according to the PAF model as well as the SIPOC diagram. This study showed that a systematic approach could be established for monitoring the COQ elements and using them in the process of improving quality competitiveness. Methods: The PAF(Prevention-Appraisal-Failure) model has been employed in the process of collecting COQ elements for a power generation company. All the cost of quality elements were first examined through an extensive review of articles and books in the field of quality. The cost elements were then refined and augmented by conducting a comparative study with international standards. The COQ elements have been verified by a group of quality managers and classified according to both the PAF model and the SIPOC diagram for better understanding in the entire organization. An improvement strategy has been also proposed by using a typical COQ level of power generation companies. Conclusion: The conventional PAF model was used in establishing a COQ management system for power generation industries. This case study illustrates the procedure about identification, classification and computation of quality costs, including selection of improvement projects. The system can be used not only for observing the current state of cost elements related to quality, but also for planning an improvement strategy using the ratio of cost classification.

Customer Nodal Cost Calculation considering Power Quality (전력품질을 고려한 수용가 모선 가격 계산)

  • Jeong, Sung-Won;Park, In-Duck;Gim, Jae-Hyeon;Lee, Geun-Joon
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.21 no.3
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    • pp.82-87
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    • 2007
  • This paper measures power quality of bus in case electric charges about customer are imposed by each bus, supposed that can calculate this cost. When reflected this in system planning, expected cost proposed following method through sample system. To calculate nodal cost operating condition of power equipment calculates nodal cost[$/MVAH] supposing by situation that is optimized by OPF(optimal power flow) in system. The damage cost that is shed by fault that happen during year of loads in system that is linked on each bus was produced. As a result, proposed method was very effective in case of calculating bus total cost including power quality cost.

Evaluation of Power Quality Cost Based on Value-Based Methodology and Development of Unified Index (가치산정법에 의한 전력품질비용 산정 및 단일화지수의 개발)

  • Lee, Buhm;Kim, Kyoung-Min
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.60 no.7
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    • pp.1293-1298
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    • 2011
  • This paper presents an Unified Index which can evaluate a performance of a distribution system based on value-based methodology. Reliability cost and voltage sags cost are calculated for each load point using Reliability Sector Customer Damage Function(SCDF). Aging cost is calculated for each load point using Aging SCDF. Power loss cost and operation cost are calculated for the system. By summation of each cost of load point and system, power quality cost can be obtained. Finally, this paper developed an unified index which can show the performance of a distribution system. Presented method has been applied to a real system, the usefulness of the method has been verified.

A Model for Power Quality Control Mechanism for Electric Power Market (전력시장체제하에서의 전력품질제어 매커니즘에 대한 모델링)

  • Lee, Geun-Joon;Yun, Suk-Ho;Heydt, G.T.
    • Proceedings of the KIEE Conference
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    • 2002.11b
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    • pp.15-19
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    • 2002
  • To provide a specified power quality under electric market system is becoming an important issue for customers and utility company. However, there is no realistic infra-structure to design a power system for the specified power quality. Present electric market is operating under the economic point of view. The low price could be attractive. but the effect of low price and low power quality for the long time should be considered for the system safety. This paper presents a model which conceptualize the dynamic power quality control mechanism to minimize total cost of a society which is affected electric power quality. This model aims to produce a basic infra-structure to balance cost and quality under the electric market system.

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A Study on the Development of Industrial Power Management System (수용가 전력관리시스템 개발 연구)

  • Moon, Young-Hwan;Seong, Ki-Chul;Yoon, Sang-Hyun;Kim, Eon-Chung
    • Proceedings of the KIEE Conference
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    • 1995.07b
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    • pp.550-552
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    • 1995
  • Real time informations from industrial power system in operation can be used for efficient energy conservation, optimal operation of electrical equipments, and expansion planning of apparatus. Requirements for energy conservation and supplied power quality in customers are increasing significantly because of their effects on the production cost and efficiency. Thus, the development of low cost power management system which can can operate in domestic power system properly is substantially requested. In this research, operation software for real time monitoring and control system in customer power system has been developed to achieve the above purposes. The development of the operating software and related technologies are expected to be applied successfully for reducing electricity cost, enhancing power quality, determining facility expansion planning, operating optimal power system, increasing production efficiency, and reducing maintenance cost.

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Customer Nodal Cost Calculation using Voltage Sag Coordination Charts (전압 강하 협조 그래프(VSCC)를 이용한 수용가 모선 가격 계산)

  • Jeong, Sung-Won;Lee, Hyun-Chul;Lee, Geun-Joon;Gim, Jae-Hyeon
    • Proceedings of the KIEE Conference
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    • 2008.07a
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    • pp.298-299
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    • 2008
  • In this paper, supposed that can measure power quality of bus and can calculate this cost in case electric charges about customer are imposed by each bus. When reflected this in system planning, expected cost proposed following method through sample system. We calculated the nodal cost by OPF(optimal power flow) in system and the drop numbers that happen during year of loads utilizing VSCC. Also calculated BPQC using the disruption numbers. As a result, calculated bus total cost including power quality cost through case study.

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