• Title/Summary/Keyword: Peak cut

Search Result 195, Processing Time 0.03 seconds

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
    • /
    • v.65 no.1
    • /
    • pp.219-226
    • /
    • 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.

Output Characteristics of Peak-Cut Saver System with Energy Storage Device (에너지 저장장치를 갖는 피크컷 세이버 시스템의 출력특성 연구)

  • Seo, Hyou-Uk;Han, D.H;Lee, Y.J;Chun, T.W;Choe, Gyu-Ha
    • Proceedings of the KIPE Conference
    • /
    • 2011.11a
    • /
    • pp.231-232
    • /
    • 2011
  • It is very important thing to efficiently utilize the solar power. The conventional solar power system has no energy storage device. So the conventional system cannot cut the peak load. In this paper, the solar power system with the energy storage device and the operation algorithm of peak cut function was proposed to cut the peak load. The algorithm principle is proposed based on the insolation curve and load curve. The simulation and experiment was performed to demonstrate the validity of the peak cut algorithm.

  • PDF

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
    • /
    • v.8 no.4
    • /
    • pp.371-380
    • /
    • 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.

Analysis of Electric Power Peak-Cut Effect by Gas Cooling (가스냉방 전력대체효과 분석)

  • Jeong, Si-Young;Kim, Dae-Hwan;Park, Ki-Woong
    • Proceedings of the SAREK Conference
    • /
    • 2009.06a
    • /
    • pp.208-211
    • /
    • 2009
  • To reduce the peak demand the promotion of gas cooling(absorption chillers and GHPs) is required. In this study the effect of electric power peak-cut has been analyzed using two methods. One is based on monthly LNG consumption data and the other is using the gas cooling capacity installed. Both methods agreed well with each other within the uncertainty of 20%. It was found that the gas cooling had the peak cut effect of 1,500-2,000 MW for recent 5 years (2003 - 2007). The ratio of gas cooling to the whole cooling demand was 12-15%, which is needed to be increased.

  • PDF

Solar ESS Peak-cut Simulation Model for Customer (수용가 대응용 태양광 ESS 피크컷(Peak-cut) 시뮬레이션 모델)

  • Park, Seong-Hyeon;Lee, Gi-Hyun;Chung, Myoung-Sug;Chae, U-ri;Lee, Joo-Yeuon
    • Journal of Digital Convergence
    • /
    • v.17 no.7
    • /
    • pp.131-138
    • /
    • 2019
  • The world's electricity production ratio is 40% for coal, 20% for natural gas, 16% for hydroelectric power, 15% for nuclear power and 6% for petroleum. Fossil fuels also cause serious problems in terms of price and supply because of the high concentration of resources on the earth. Solar energy is attracting attention as a next-generation eco-friendly energy that will replace fossil fuels with these problems. In this study, we test the charge-operation plan and the discharge operation plan for peak-cut operation by applying the maximum power demand reduction simulation. To do this, we selected the electricity usage from November to February, which has the largest amount of power usage, and applied charge / discharge logic. Simulation results show that the contract power decreases as the peak demand power after the ESS Peak-cut service is reduced to 50% of the peak-target power. As a result, the contract power reduction can reduce the basic power value of the customer and not only the economic superiority can be expected, but also contribute to the improvement of the electric quality and stabilization of the power supply system.

A Study on the Characteristics of Wire-Cut Electric Discharge Machining of Alloyed Tool Steel and Tungsten Carbide (와이어컷 방전에 의한 합금공구강과 초경합금의 가공특성)

  • 이재명;허성중;김원일
    • Transactions of the Korean Society of Automotive Engineers
    • /
    • v.4 no.1
    • /
    • pp.123-133
    • /
    • 1996
  • From the experimental study of wire-cut Electric Discharge Machining of alloyed tool steel and tungsten carbide, the characteristics such as cutting speed, surface roughness has been observed and evaluated for various conditions. Cutting speed is improved as peak discharge current and wire tension become increased, and gap voltage and spark cycle decreased. Surface roughness can be better when peak discharge current and gap voltage become smaller, or spark cycle and wire tension become larger. Secondary cut is recommended to obtain high precision and good quality.

  • PDF

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
    • /
    • v.14 no.5
    • /
    • pp.415-422
    • /
    • 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.

Is the Peak-Affect Important in Fast Processing of Visual Images in Printed Ads?: A Comparative Study on the Affect Integration Theories

  • Bu, Kyunghee;Lee, Luri
    • Asia Marketing Journal
    • /
    • v.24 no.3
    • /
    • pp.96-108
    • /
    • 2022
  • This study investigates how affects elicited by visual images in print ads are integrated to form a liking for the ads. Assuming a sequential rather than simultaneous processing of still-cut images, we adopt the 'think-aloud' method to capture consumers' spontaneous responses to visual images. We hypothesize that not only would consumers show mixed affects toward a still-cut visual image but that they would also integrate their serial affects heuristically rather than simply averaging the affects as suggested by the compensatory hypothesis. By comparing the effects of two contradictory affect integration hypotheses (i.e., peak-affect and mood-maintenance) with compensatory integration, using a single regression model, we found that peak-negative along with mood maintenance integration of serial affects for a print ad works best in the formation of ad liking. The results also support our initial premise that people can have mixed valence even toward a still-cut ad.

A Weighted Preliminary Cut-off Indoor Positioning Scheme Based on Similarity between Peaks of RSSI (최대 RSSI 간의 유사도를 기반으로 한 가중치 부여 사전 컷-오프 실내 위치 추정 방식)

  • Kim, Dongjun;Son, Jooyoung
    • Journal of Korea Multimedia Society
    • /
    • v.21 no.7
    • /
    • pp.772-778
    • /
    • 2018
  • We have previously proposed a preliminary cut-off indoor positioning scheme considering the reference point with the same signal similarity. This scheme estimates the position using the relative rank of the peak of received signal strength from the beacons around user. However, this scheme has a weak point with lower accuracy when there are more than one nearest reference points having the same signal similarity. In order to tackle this, we propose a weighted preliminary cut-off indoor positioning scheme. Firstly, if the above problem occurs, the similarity to the peak of signal strength is considered as well as the relative rank. Next, weights are assigned to the nearest reference points using the similarity to the peak of the received signal strength. Finally, the user's position is estimated by applying the weights. As a result, the weighted preliminary cut-off scheme improves the positioning accuracy by about 7.9% compared to the previous scheme.

Characteristics of Negative Peak Wind Pressure acting on Tall Buildings with Step on Wall Surface

  • Yoshida, Akihito;Masuyama, Yuka;Katsumura, Akira
    • International Journal of High-Rise Buildings
    • /
    • v.8 no.4
    • /
    • pp.283-290
    • /
    • 2019
  • Corner cut, corner chamfered or a building shape change are adopted in the design of tall buildings to achieve aerodynamic superiority as well as response reduction. Kikuchi et.al pointed out that large negative peak external pressures can appear near the inside corner of set-back low rise buildings. It is therefore necessary to pay attention to facade design around steps in building surfaces. Peak wind pressures for corner cut or corner chamfered configurations are given in the AIJ code. However, they cannot be applied where there are many variations of vertical and horizontal steps. There has been no previous systematic research on peak wind pressures around steps in building surfaces. In this study, detailed phenomenon of peak wind pressures around steps in buildings are investigated focusing on vertical and horizontal distances from the building's corner.