• KEPCO Journal on Electric Power and Energy
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• 제2권1호
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• pp.83-88
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• 2016

This paper describes the test results of plant minimum stable load (Pmin) for Ilijan Power Plant. The test was conducted on May 13 through 14, 2015 to investigate the plant operating and equipment condition in accordance with "Ilijan Plant Performance Test Procedure on Plant Minimum Stable Load" [1]. This paper also contains the assessment of the impact of Pmin to plant operating parameters and possible technical operating issues when operating at lower loads and to recommend the safe minimum load operation of Ilijan per block. In addition, this paper describes the performance calculation results of efficiency and heat rate depending on the load level.

• KEPCO Journal on Electric Power and Energy
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• 제5권1호
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• pp.17-24
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• 2019

본 논문은 전력계통의 부하 모델이 단기 전압 안정도 해석 결과에 미치는 영향을 분석하였다. 우선, 본 논문에서는 일반적으로 많이 사용되는 부하 모델을 소개하였고, 일부 부하 모델은 모델 파라미터를 최적화하더라도 실제 측정된 계통 현상을 재현할 수 없다는 것을 확인하였다. 또한, 본 논문에서는 상정사고 상황을 고려하여 국내 전력계통의 단기 전압 안정도 해석 시 부하 모델의 영향과 지역별 부하 모델의 영향성을 검토하였다. 해당 결과를 통해 부하 모델 선정의 중요성을 재차 확인할 수 있었으며, 상정사고 인근 지역의 부하 특성을 보다 더 정확하게 반영해야 함을 알 수 있다.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2006년도 춘계학술대회 논문집
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• pp.442-447
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• 2006

This paper investigates the shadow amount of edifice and according to time zone used by its Electric heating appliances, it is analyzed that Electric Heating Power Load affects Heal power load variation curve. Also, in case that the far infrared ray heating system, which are used as new electric heating system, occupies some of the existing Electric heating appliances, it is analyzed that the Electric heating power load affects the Peak load power in Korea.

• 태양에너지
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• 제19권3호
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• pp.63-73
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• 1999

Ice storage systems are used to shift the peak load in day time into night time in summer. This paper describes a system simulation of partial ice storage system composed of an encapsulated ice storage tank, a screw compressor chiller, a heat exchanger, and a brine pump. For the system simulation, a one-dimensional model of ice storage tank is developed and validated by comparison with the performance data from measurements of an ice storage tank installed at a building. The control strategies considered in this study are chiller priority and storage priority being used commercially. The system is simulated with design cooling load of 600 RT peak load in design day and with off-design day cooling load, and the electric energy costs of the two control strategies for the same system size are compared. As a result of calculation, the energy consumption in a week for storage priority is higher than that for chiller priority control. However due to lower cost of night electric charge rate, energy cost for storage priority control is lower than chiller priority.

• 전기학회논문지
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• 제62권11호
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• pp.1590-1597
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• 2013

Electric power is an important part in economic development. Moreover, an accurate load forecast can make a financing planning, power supply strategy and market research planned effectively. This paper used the fuzzy logic system to predict the regional electric power load. To design the fuzzy prediction system, the correlation-based clustering algorithm and TSK fuzzy model were used. Also, to improve the prediction system's capability, the moving average technique and relative increasing rate were used in the preprocessing procedure. Finally, using four regional electric power load in Taiwan, this paper verified the performance of the proposed system and demonstrated its effectiveness and usefulness.

• 제어로봇시스템학회논문지
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• 제8권11호
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• pp.948-953
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• 2002

The electric power load during the peak time in summer is strongly affected by cooling load, which decreases the preparation ratio of electricity and brings about the failure in the supply of electricity in the electric power system. The ice-storage system and heat pump system are possible solutions to settle this problem. In this study. the method of estimating temperature and humidity to forecast the cooling load of ice-storage system is suggested, then the method of forecasting the cooling load using fuzzy logic is suggested by simulating that the cooling load is calculated using actual temperature and humidity. The forecast of the temperature, humidity and cooling load are simulated, and it is shown that the forecasted data approach to the actual data. Operating the ice-storage system by the forecast of cooling load with night electric power will improve the ice-storage system efficiency and reduce the peak electric power load during the summer season as a result.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1989년도 하계종합학술대회 논문집
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• pp.246-250
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• 1989

Owing to the rapid development of economy and the higher living standard of people, electricity demands have growth and the peak load has been increased rapidly. To cope with this impacts and to reduce the cost of service,utilities are conserned about power load management program. This paper shows a scheme of power load control and the basic structure of direct load control system. And also radio control method using the public pager which is one of the best economical and serviceable method in techniques will be introduced briefly.

• 전기학회논문지
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• 제63권11호
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• pp.1497-1502
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• 2014

Electric load forecasting is essential for stable electric power supply, efficient operation and management of power systems, and safe operation of power generation systems. The results are utilized in generator preventive maintenance planning and the systemization of power reserve management. Development and improvement of electric load forecasting model is necessary for power system maintenance and operation. This paper proposes daily maximum electric load forecasting methods for the next 4 weeks with a seasonal autoregressive integrated moving average model and an exponential smoothing model. According to the results of forecasting of daily maximum electric load forecasting for the next 4 weeks of March, April, November 2010~2012 using the constructed forecasting models, the seasonal autoregressive integrated moving average model showed an average error rate of 6,66%, 5.26%, 3.61% respectively and the exponential smoothing model showed an average error rate of 3.82%, 4.07%, 3.59% respectively.

• Journal of Advanced Marine Engineering and Technology
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• 제38권4호
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• pp.403-408
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• 2014

조선소에서 건조하고 있는 선박, 해양플랜트에 설치된 발전기의 부하 성능 시험 시 생산되는 막대한 양의 전력은 컨테이너 형태로 제작된 로드뱅크를 통해 전량 열로 낭비된다. 따라서 본 연구에서는 선박 건조 시 발전기 부하시험으로 낭비되는 전력량을 대형 조선소를 대상으로 정량적으로 조사하였으며, 소형발전기에서 생산된 전력을 한전계통에 연계하여 회수하는 실험실의 실험결과를 바탕으로 조선소에서 발전기 부하시험 시 생산되는 전력을 한전계통에 연결할 경우 회수 가능한 전력량을 연구 분석하였다.

• 전기학회논문지
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• 제64권7호
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• pp.1088-1095
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• 2015

In most cases, the use of electric power is associated with the economic scale of a nation closely. Thus, the electric power load forecasting plays an important role for the national economic plan. This paper deals with the design method for the electric power load forecasting system. In this paper, RCR-MA data processing, which can make the complex properties of the original data form simple, is proposed. Next, IT2TSK FLS, which can reflect the uncertainty of data more than T1TSK FLS, is applied. Consequently, the structural advantage of the proposed system can improve the forecasting accuracy, and is verified by using two types of electric power data.