• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.551_552
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• 2009

본 논문에서는 수요반응 프로그램 설계 시 프로그램의 효과를 평가할 때 사용되는 CBL (Customer Baseline Load)의 추정방법으로 일기보정을 고려한 가중이동평균법 (Weighted Moving Average)을 제시하였다. 또한 제안된 방법을 PJM에서 관리하는 지역 전력 수요 데이터를 이용한 사례연구 수행 결과를 예시하였다.

• Proceedings of the KIEE Conference
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• 2002.07a
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• pp.392-394
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• 2002

전력시장에서의 적정 설비예비력을 확보하는 문제는 구조개편의 진행과 캘리포니아 전력비상사태 이후 더욱 더 중요성을 가짐에 따라 이에 대한 심도 있는 논의와 분석이 필요하게 되었다. 이런 이유로 현재 해외전력시장에서 활용중인 적정 설비예비력 확보방안들을 이론적 및 실증적인 방법에 의한 비교 분석을 통하여 한국전력시장에 적합한 방안을 모색하고자 한다. 본 논문에서는 특히 미국 PJM 전력시장 등에서 활용중인 용량의무 방식과 캘리포니아 시장에서 활용중인 시장의존방식을 중심으로 적정 설비예비력 확보방안을 간략하게 비교하고자 한다.

• Journal of Electrical Engineering and Technology
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• v.4 no.2
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• pp.149-158
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• 2009

It is important to derive reliable parameter values in the measurement-based load model development of electric power systems. However parameter estimation tasks, in practice, often face the parameter identifiability issue; whether or not the model parameters can be estimated with a given input-output data set in reliable manner. This paper introduces concepts and practical definitions of the local identifiability of model parameters. A posteriori local identifiability is defined in the sense of nonlinear least squares. As numerical examples, local identifiability of third-order induction motor (IM) model and a Z-induction motor (Z-IM) model is studied. It is shown that parameter ill-conditioning can significantly affect on reliable parameter estimation task. Numerical studies show that local identifiability can be quite sensitive to input data and a given local solution. Finally, several countermeasures are proposed to overcome ill-conditioning problem in measurement-based load modeling.

• Journal of Electrical Engineering and Technology
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• v.3 no.1
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• pp.14-19
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• 2008

The paper presents an intelligent time series model to predict uncertain electricity market price in the deregulated industry environment. Since the price of electricity in a deregulated market is very volatile, it is difficult to estimate an accurate market price using historically observed data. The parameter of an intelligent time series model is obtained based on the simultaneous perturbation stochastic approximation (SPSA). The SPSA is flexible to use in high dimensional systems. Since prediction models have their modeling error, an error compensator is developed as compensation. The SPSA based intelligent model is applied to predict the electricity market price in the Pennsylvania-New Jersey-Maryland (PJM) electricity market.

• Proceedings of the KIEE Conference
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• summer
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• pp.719-721
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• 2004

All over the world, including England & Wales, USA(PJM, California, New York etc.), Australia, New Zealand, Canada and Korea, experience deregulation in the electric power sector. Inevitably, new terminologies associated with this field art generated more and more. Therefore, this paper proposes explanation principles of new terminologies in electric power deregulation.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.60 no.2
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• pp.266-272
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• 2011

Real Time Pricing(RTP) is used not only to stabilize the price volatility in electricity market, but to hedge the price risk for Load Serving Entity(LSE). This paper presents an efficient method to reduce the risk of the price volatility in real-time electricity market. For designing the RTP, load patterns of customer are calculated by applying the demand elasticity and customer's utility is also analyzed to compute the RTP revenue through the risk-attribute of the LSE. In the end, the distribution of the LSE's profits can be evaluated to lead the optimal RTP value, depending on the level of customer's participation. Results from the case study based on PJM data are reported to illustrate the proposed method.

• Proceedings of the KIEE Conference
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• 2004.11b
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• pp.269-271
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• 2004

전력산업 구조의 변화와 전력수급의 안정성 확보를 위해, 다양한 전원개발에 대한 연구가 시도되고 있다. 본 연구에서는 현재 미국에서 시행하고 있는 수요응답자원(Demand Response Resource)에 대한 수요응답 프로그램(Demand Response Program)의 성과를 조사하고 이를 분석하였다. 미 연방에너지 규제위원회(FERC)의 시장표준안과 각 주의 공익규제위원회(PUC)에 규제에 의해 대부분의 미 전력시장에서는 이러한 수요응답 프로그램을 시행하고 있다. 본 논문에서는 미국 전력시장을 대표하는 New England ISO, PJM, 그리고 NYISO 세 곳의 수요응답 프로그램 효과를 조사하였다. 본 논문에서는 수요응답 프로그램의 참여자 수와 수용응답 이벤트 발생 건 수, 총 차단부하량, 평균 차단부하량, 그리고 지급액의 관점에서 수요웅담 프로그램의 효과를 조사하였다.

• Proceedings of the KIEE Conference
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• 2004.11b
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• pp.281-283
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• 2004

All over the world, including England & Wales, USA(PJM, California, New York etc.), Australia, New Zealand, Canada and Korea, experience deregulation in the electric power sector. Inevitably, new terminologies associated with this field are generated more and more. Therefore, this paper proposes explanation principles of new terminologies in electric power deregulation.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.5
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• pp.738-744
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• 2017

Recently, the installation of energy storage systems (ESSs) has increased in parallel with the extension of renewable energy resources. However, there has been no concrete analysis ofthe performance verification and economic evaluation of ESSs,which makes it difficult to perform aneffective installation and operation of an ESS. In particular, there are no international technical standards and guidelines on electric ESS for frequency regulation applications. Therefore, acomprehensive study on the power quality, impact on grid, extent of contribution, and cost benefit study of ESS are strongly being required. Under these backgrounds, this paper proposes a performance verification algorithm on ESS for frequency regulation application based on ananalysis of the AGC(Automatic Generation Control) performance verification method of PJM in USA. In addition,this paper proposes an economic evaluation algorithm on a 500 MW installation of ESS for frequency regulation applications using the account settlement of an expensive gas-fired generation plant and coal-fired power generation plant. From the simulation with real ESS operation data and 500 MW installation case, it wasconfirmed that the ESS showssuperior performance toany other conventional generators and provides anannual benefit of 500 MW ESS are between 345~429 billon won.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.67 no.5
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• pp.617-625
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• 2018

Since FERC order 755 was published, each frequency regulation market rules of the North American ISO/RTO have been revised in many parts. In 2016, the domestic CBP market has also changed its market rules to allow ESS to participate in the frequency regulation reserve services(Governor Free and Automatic Generation Control). This paper compares and analyzes the changed North American ISP/RTO market and domestic CBP market rules. In particular, we compare PJM and CAISO frequency regulation market pricing mechanism and settlement rules with the settlement rules of the domestic CBP market and compare the factors of each market used to compensate the participating resources in terms of resource dependency and accuracy.