• Title/Summary/Keyword: Peak power

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The Analysis of 2004 Summer Peak Load in Korea Power system (2004년 하계 첨두부하 시 계통운영 실적 분석)

  • Song, Tae-Yong;Hwang, Bong-Hwan
    • Proceedings of the KIEE Conference
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    • pp.113-115
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    • 2004
  • This year korea power system had recorded highest peak load for 6 times and finally it made new peak load 51,264MW at July 29th 3:00 PM. The new peak load is increased 8.2% from the last year peak load 47,385MW and korea power system entered 50,000MW load era. The Korea Power Exchange (KPX) snapped power system data at the peak load time using state estimation function in the EMS. And authors converted the power system data at peak load to PSS/E power flow format. Using this PSS/E peak load power flow data, this paper explains demand analysis result shun capacitor operation, voltage distribution at the peak load. And the paper shows the simulation result of 2 contingency analysis using the snapped PSS/E peak load data.

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Utility Interactive PV Systems with Power Shaping Function for Increasing Peak Power Cut Effect

  • Choe, Gyu-Ha;Kim, Hong-Sung;Heo, Hye-Seong;Jeong, Byong-Hwan;Choi, Young-Ho;Kim, Jae-Chul
    • Journal of Power Electronics
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    • v.8 no.4
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    • pp.371-380
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    • 2008
  • This paper describes the Utility Interactive PV (UIPV) system which can improve the peak-cut effect by adding an energy storage device of batteries to the power converter. The proposed system has three possible operation modes depending on relative condition of PV output, which can have the power shaping function covering the peak power for 3 hours. A new power circuit and an application algorithm have been applied to the UIPV system which is based on working PV system during a 3-hour peak time. The energy relationship by the proposed system is analyzed theoretically and experimentally. The proposed system is evaluated at the viewpoint of cost and total spacing, which enables the proposed UIPV system to have the reduction of the peak power demand and hence to improve the power capacity of peak cut.

Study of Peak Load Demand Estimation Methodology by Pearson Correlation Analysis with Macro-economic Indices and Power Generation Considering Power Supply Interruption

  • Song, Jiyoung;Lee, Jaegul;Kim, Taekyun;Yoon, Yongbeum
    • Journal of Electrical Engineering and Technology
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    • v.12 no.4
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    • pp.1427-1434
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    • 2017
  • Since the late 2000s, there has been growing preparation in South Korea for a sudden reunification of South and North Korea. Particularly in the power industry field, thorough preparations for the construction of a power infrastructure after reunification are necessary. The first step is to estimate the peak load demand. In this paper, we suggest a new peak demand estimation methodology by integrating existing correlation analysis methods between economic indicators and power generation quantities with a power supply interruption model in consideration of power consumption patterns. Through this, the potential peak demand and actual peak demand of the Nation, which experiences power supply interruption can be estimated. For case studies on North Korea after reunification, the potential peak demand in 2015 was estimated at 5,189 MW, while the actual peak demand within the same year was recorded as 2,461 MW. The estimated potential peak demand can be utilized as an important factor when planning the construction of power system facilities in preparation for reunification.

Development of Adaptive Home Power Peak-Cut Control System Using Power Line Communication (전력선통신을 이용한 소규모 주택용 맞춤형 전력피크 제어시스템 개발)

  • Kim, Sang-Dong;Park, Ji-Ho;Kim, Dong-Wan
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.65 no.1
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    • pp.219-226
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    • 2016
  • In this paper, adaptive home power peak-cut control system is developed using PLC. The developed scheme provides monitoring of power usage, power peak-cut control and additional function. In test bed, zone is presented by bedroom, living room, kitchen and bathroom. And individual load is presented by lighting, heater and fan in zone. In developed scheme, zone control is implemented by single PLC modem. And individual load control is implemented by key-map table. In addition, power peak-cut control system S/W, which can perform setting of power peak, power peak-cut control and monitoring of power usage.

Circuit Design of Parallel Power Operation Equipment for Peak Power Reduction (상전원의 피크치 전력 감소를 위한 전력병합장치 회로설계)

  • Yang, Jaesoo;Kim, Donghan;Kim, ManDo
    • KIPS Transactions on Computer and Communication Systems
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    • v.3 no.9
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    • pp.273-278
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    • 2014
  • Recent use of electricity during peak hours electricity supply-demand imbalance is inevitable that limit power use force. Therefore, in this paper, a circuit of parallel power operation equipment for peak power reduction which saves the power to electricity storage device during the non-peak power time and supply from the storage power during the expected power shortages time is designed Through this circuitry, the peak power of the commercial power supply with the parallel operation and connection of the commercial power supply and the power supply of the inverter from electricity storage that is a key feature of PRS(Peak power Reduction System) can be controlled. In addition, in order to increase the efficiency, a Transless Power Circuit DC-AC inverter is developed. Moreover, a variable impedance control is applied to the storage of electric power of an Uninterruptible Power Supply associated with a commercial power source.

An Economic Analysis on Dual-fuel Engine Generation for Peak Load (피크부하용 혼소엔진발전의 경제성 분석)

  • Lee, Ok-Bae;Ahn, Jae-Kyoung
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.61 no.9
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    • pp.1260-1268
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    • 2012
  • Recently, lack of power reserve margin was observed quite often. In this paper, we studied the method to secure power source for a short time, to cut the utility power peak load, and to reduce the users electricity bills. Emergency diesel generator of an office building is to be converted into a dual-fuel engine generator which is responsible for a portion of the peak load. Compared to the conventional diesel fuel generator, the proposed dual-fuel engine is able to reduce the generation power cost by dual-fuel combustion, and it also mitigates the building's utility power peak load by charging the building's peak load. If the dead resources (a group of emergency dual-fuel engine generators), as a Virtual Power Plant, are operating in peak time, we can significantly reduce future large power development costs. We investigated the current general purpose electricity bills as well as the records of the building electric power usage, and calculated diesel engine generator renovation costs, generation fuel costs, driving conditions, and savings in electricity bills. The proposed dual-fuel engine generation method reduces 18.1% of utility power peak load, and turned out to be highly attractive investment alternative which shows more than 27% of IRR, 76 million won of NPV, and 20~53 months of payback periods. The results of this study are expected to be useful to developing the policy & strategy of the energy department.

Peak Power Reflectivity and Phase Conjugation Fidelity in a Pulse Compression Process by Stimulated Brillouin Scattering (유도 브릴루앙 산란에 의한 펄스 압축 과정에서의 Peak Power 반사율과 위상공액도)

  • 조민식;최병일;남창희
    • Korean Journal of Optics and Photonics
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    • v.5 no.1
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    • pp.37-44
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    • 1994
  • The characteristics of stimulated Brillouin scattering wave for applications to high power laser was experimentally investigated. The peak power reflectivity and the phase conjugation fidelity of Stokes wave with respect to the focal length of lens were measured, and the phase conjugation fidelity for a compressed part of the Stokes wave was also investigated. For the long focal length of lens.(f=100 cm), the peak power of the Stokes wave amounts to about twice as high as that of incident wave. The phase conjugation fidelity for the compressed leading pulse is up to 90%, better than that for other temporal parts of the Stokes pulse. In spatial distribution, the Stokes pulse from the axial region has the largest SBS gain, and it has been ascertained as a best candidate to the application due to excellent pulse compression, peak power reflectivity, and good phase conjugation fidelity.

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Development of Daily Peak Power Demand Forecasting Algorithm using ELM (ELM을 이용한 일별 최대 전력 수요 예측 알고리즘 개발)

  • Ji, Pyeong-Shik;Kim, Sang-Kyu;Lim, Jae-Yoon
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.62 no.4
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    • pp.169-174
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    • 2013
  • Due to the increase of power consumption, it is difficult to construct an accurate prediction model for daily peak power demand. It is very important work to know power demand in next day to manage and control power system. In this research, we develop a daily peak power demand prediction method based on Extreme Learning Machine(ELM) with fast learning procedure. Using data sets between 2006 and 2010 in Korea, the proposed method has been intensively tested. As the prediction results, we confirm that the proposed method makes it possible to effective estimate daily peak power demand than conventional methods.

Improved Operating Method of Utility Interactive PV System for Peak Power Cut Effect (첨두부하 삭감효과를 갖는 UIPV시스템의 개선된 운용방법)

  • Kim, Young-Sik;Bayasgalan, Dugarjav;Heo, Hye-Seong;Choe, Gyu-Ha
    • The Transactions of the Korean Institute of Power Electronics
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    • v.14 no.5
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    • pp.415-422
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    • 2009
  • This paper describes the UIPV(Utility Interactived Photovoltaic) system which can improve the peak-cut effect by adding energy storage device of batteries to the power converter. The proposed system has three possible operation modes depending on relative condition of PV output, which can have the power shaping function covering the peak power for 3 hours. A new power circuit and application algorithm has been applied to UIPV system which is based on working PV system during 3-hour peak time. The energy relationship by the proposed system is analyzed theoretically and experimentally. Also the proposed system is evaluated at the viewpoint of cost and total spacing, which enables the proposed UIPV system to have the reduction of the peak power demand and hence to improve.

Study for Power Management System using Regenerative Energy in Electric Railway Systems (회생에너지를 이용한 도시철도 전력관리시스템 구축에 관한 연구)

  • Lee, Hansang;Cho, Yoonsung;Kim, Hyungchul;Jung, Hosung
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.63 no.1
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    • pp.191-196
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    • 2014
  • For the large scale of electricity consumer, since the price for the electricity consumption depends on the peak power, the issue for peak power reduction have been being studied widely. Electric railway systems, which is one of the most representative large scale of loads, also has assignment to reduce the peak power since they have high peak power and low energy consumption load characteristics. In the aspect of the economic operation through reduction of peak power, this paper proposes a novel algorithm for power management system in electric railway systems using energy storage.