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Prof. Dr. Soohwan Cho
Sangmyung University, South Korea

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Research Keywords & Expertise

0 Demand Forecasting
0 microgrid
0 Smart City Technology
0 Renewable Energy Forecasting
0 Power quality analysis and optimization

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Demand Forecasting

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Journal article
Published: 14 August 2020 in Electronics
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The development of Distributed Energy Resources (DERs) is essential in accordance with the mandatory greenhouse gas (GHG) emission reduction policies, resulting in many DERs being integrated into the power system. Currently, South Korea is also focusing on increasing the penetration of renewable energy sources (RES) and EV by 2030 to reduce GHGs. However, indiscriminate DER development can give a negative impact on the operation of existing power systems. The existing power system operation is optimized for the hourly net load pattern, but the integration of DERs changes it. In addition, since ToU (Time-of-Use) tariff and Demand Response (DR) programs are very sensitive to changes in the net load curve, it is essential to predict the hourly net load pattern accurately for the modification of pricing and demand response programs in the future. However, a long-term demand forecast in South Korea provides only the total amount of annual load (TWh) and the expected peak load level (GW) in summer and winter seasons until 2030. In this study, we use the annual photovoltaic (PV) installed capacity, PV generation, and the number of EV based on the target values for 2030 in South Korea to predict the change in hourly net load curve by year and season. In addition, to predict the EV charging load curve based on Monte Carlo simulation, the EV users’ charging method, charging start time, and State-of-Charge (SoC) were considered. Finally, we analyze the change in hourly net load curve due to the integration of PV and EV to determine the amplification of the duck curve and peak load time by year and season, and present the risks caused by indiscriminate DERs development.

ACS Style

Chi-Yeon Kim; Chae-Rin Kim; Dong-Keun Kim; Soo-Hwan Cho. Analysis of Challenges Due to Changes in Net Load Curve in South Korea by Integrating DERs. Electronics 2020, 9, 1310 .

AMA Style

Chi-Yeon Kim, Chae-Rin Kim, Dong-Keun Kim, Soo-Hwan Cho. Analysis of Challenges Due to Changes in Net Load Curve in South Korea by Integrating DERs. Electronics. 2020; 9 (8):1310.

Chicago/Turabian Style

Chi-Yeon Kim; Chae-Rin Kim; Dong-Keun Kim; Soo-Hwan Cho. 2020. "Analysis of Challenges Due to Changes in Net Load Curve in South Korea by Integrating DERs." Electronics 9, no. 8: 1310.

Journal article
Published: 31 May 2020 in Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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As the various high-tech electronic appliances are used more and more in present, the proportion of electrical loads using DC power is also increasing, and the demand for these DC loads is expected to gradually increase in the future. In these loads, the power electronic devices are required for converting AC to DC power, and they are called nonlinear load since they have nonlinear relation between the voltage and the current. The nonlinear load have some common characteristics that they are sensitive to power quality, produce harmonics and deteriorate power factor. In this case, it is impossible to expect the power factor correction by simply installing capacitors. This paper is written to verify the relationship between nonlinear load and power factor with real measurement data and to show the practical effect of harmonics mitigation on power factor correction for nonlinear load in details.

ACS Style

Jae-Cheon Lee; Soo-Hwan Cho. Effect of Harmonics Mitigation on Power Factor Correction for Nonlinear Loads based on Actual Measurement Data. Journal of the Korean Institute of Illuminating and Electrical Installation Engineers 2020, 34, 1 -10.

AMA Style

Jae-Cheon Lee, Soo-Hwan Cho. Effect of Harmonics Mitigation on Power Factor Correction for Nonlinear Loads based on Actual Measurement Data. Journal of the Korean Institute of Illuminating and Electrical Installation Engineers. 2020; 34 (5):1-10.

Chicago/Turabian Style

Jae-Cheon Lee; Soo-Hwan Cho. 2020. "Effect of Harmonics Mitigation on Power Factor Correction for Nonlinear Loads based on Actual Measurement Data." Journal of the Korean Institute of Illuminating and Electrical Installation Engineers 34, no. 5: 1-10.

Journal article
Published: 29 February 2020 in The Transactions of The Korean Institute of Electrical Engineers
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Accurate short-term power demand forecasting is a key-technique for the optimal generator operation planning and the power market pricing. Especially, the accurate demand forecasting ability in city or community level micro-grids is more essential for local power utilities to obtain the optimal solutions for the economic energy mix and the daily energy supply planning. The forecasting error can increase the cost of purchasing additional power, cause economic losses by wasting energy, and exacerbate the system reliability. In order to minimize the forecasting error in city or community microgrid, the following two factors should be considered. One is how to determine the similar days whose time patterns of daily power demand are similar to each other and the other is how to detect and remove abnormal reference days of the similar days. Since the first issue applying the scaled RMSE method has been dealt in the previous related paper, we will summarize it in chapter 2 and focus at the second issue applying the control chart technique. In this paper, an abnormal reference days detection method based on the quality control charts such as Ⅹ,Ⅹ-R, and Ⅹ-s will be proposed and the detection performances will be compared and analyzed by simulations with actual annual demand data.

ACS Style

Chi-Yeon Kim; Chae-Rin Kim; Dong-Keun Kim; Hyeong-Jin Choi; Si-Sam Park; Soo-Hwan Cho. Scaled RMSE and Shewhart Control Chart-based Abnormal Reference Day Detection Method to Improve the Forecasting Accuracy of Community-level Power Demand. The Transactions of The Korean Institute of Electrical Engineers 2020, 69, 245 -257.

AMA Style

Chi-Yeon Kim, Chae-Rin Kim, Dong-Keun Kim, Hyeong-Jin Choi, Si-Sam Park, Soo-Hwan Cho. Scaled RMSE and Shewhart Control Chart-based Abnormal Reference Day Detection Method to Improve the Forecasting Accuracy of Community-level Power Demand. The Transactions of The Korean Institute of Electrical Engineers. 2020; 69 (2):245-257.

Chicago/Turabian Style

Chi-Yeon Kim; Chae-Rin Kim; Dong-Keun Kim; Hyeong-Jin Choi; Si-Sam Park; Soo-Hwan Cho. 2020. "Scaled RMSE and Shewhart Control Chart-based Abnormal Reference Day Detection Method to Improve the Forecasting Accuracy of Community-level Power Demand." The Transactions of The Korean Institute of Electrical Engineers 69, no. 2: 245-257.

Journal article
Published: 04 February 2020 in Sustainability
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The purpose of this study is to design a novel custom power demand forecasting algorithm based on the LSTM Deep-Learning method regarding the recent power demand patterns. We performed tests to verify the error rates of the forecasting module, and to confirm the sudden change of power patterns in the actual power demand monitoring system. We collected the power usage data in every five-minute resolution in a day from some groups of the residential, public offices, hospitals, and industrial factories buildings in one year. In order to grasp the external factors and to predict the power demand of each facility, a comparative experiment was conducted in three ways; short-term, long-term, seasonal forecasting exp[eriments. The seasonal patterns of power demand usages were analyzed regarding the residential building. The overall error rates of power demand forecasting using the proposed LSTM module were reduced in terms of each facility. The predicted power demand data shows a certain pattern according to each facility. Especially, the forecasting difference of the residential seasonal forecasting pattern in summer and winter was very different from other seasons. It is possible to reduce unnecessary demand management costs by the designed accurate forecasting method.

ACS Style

Eunjeong Choi; Soohwan Cho; Dong Keun Kim. Power Demand Forecasting using Long Short-Term Memory (LSTM) Deep-Learning Model for Monitoring Energy Sustainability. Sustainability 2020, 12, 1109 .

AMA Style

Eunjeong Choi, Soohwan Cho, Dong Keun Kim. Power Demand Forecasting using Long Short-Term Memory (LSTM) Deep-Learning Model for Monitoring Energy Sustainability. Sustainability. 2020; 12 (3):1109.

Chicago/Turabian Style

Eunjeong Choi; Soohwan Cho; Dong Keun Kim. 2020. "Power Demand Forecasting using Long Short-Term Memory (LSTM) Deep-Learning Model for Monitoring Energy Sustainability." Sustainability 12, no. 3: 1109.

Journal article
Published: 31 August 2019 in Journal of Digital Contents Society
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최근 에너지 절약을 위한 대안으로 전력 수급 현황을 실시간으로 확인할 수 있는 전력 에너지 모니터링 시스템의 필요성이 커지고 있다. 이에 따라 본 연구는 건물별의 수급 현황과 예측 추세를 실시간으로 확인할 수 있는 건물별 전력 에너지 모니터링 시스템을 개발하였다. 시스템의 개발을 위해 시스템 구성 요소를 데이터 처리 시스템, 데이터 베이스, 웹 시스템의 세 가지로 정의하고 설계하였다. 그리고 최종적으로 세부 기능 구현을 통해 시스템을 개발하였다. 비교적 단순한 구조의 설계를 통해 모니터링 시스템 개발하였고, 이를 통해 건물별 에너지의 수급 현황을 확인하고 분석하는데 활용될 수 있을 것이다.

ACS Style

Hun Kim; Dea-Gyu Choi; Soo-Hwan Cho; Hyeong-Jin Choi; Sisam Park; Ng-Keun Kim. Development of Smart City power energy monitoring system for each buildings. Journal of Digital Contents Society 2019, 20, 1513 -1522.

AMA Style

Hun Kim, Dea-Gyu Choi, Soo-Hwan Cho, Hyeong-Jin Choi, Sisam Park, Ng-Keun Kim. Development of Smart City power energy monitoring system for each buildings. Journal of Digital Contents Society. 2019; 20 (8):1513-1522.

Chicago/Turabian Style

Hun Kim; Dea-Gyu Choi; Soo-Hwan Cho; Hyeong-Jin Choi; Sisam Park; Ng-Keun Kim. 2019. "Development of Smart City power energy monitoring system for each buildings." Journal of Digital Contents Society 20, no. 8: 1513-1522.

Journal article
Published: 31 March 2019 in The Transactions of The Korean Institute of Electrical Engineers
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IEC 61000-4-15, which was originally established to introduce the test and measurement methods of flickermeter for only 120V-60Hz and 230V-50Hz power systems in 1997, have been amended to the second edition in 2010. In the second revision, more test conditions and specifications have been added. The most significant change in the revision is the addition of test conditions for 120V-50Hz, 230V-60Hz and other system conditions. The flicker measurement standards for 100V-50/60Hz and 220V-50Hz systems can be converted from the existing reference cases of 120/230V and 50/60Hz, but unfortunately the 220V-60Hz system is not considered at all. This paper is written to introduce the flicker correction factor appropriately designed for Korean distribution power system, complying with the IEC flicker measurement standard. This correction factor can be effectively used when we would measure and assess flicker in the 220V/60Hz power system using old-version IEC flickermeters.

ACS Style

Hoon-Chul Shin; Soo-Hwan Cho. A Study on Measurement Method of Flicker in Korean Distribution Power System Using Old-version IEC Flickermeter. The Transactions of The Korean Institute of Electrical Engineers 2019, 68, 393 -398.

AMA Style

Hoon-Chul Shin, Soo-Hwan Cho. A Study on Measurement Method of Flicker in Korean Distribution Power System Using Old-version IEC Flickermeter. The Transactions of The Korean Institute of Electrical Engineers. 2019; 68 (3):393-398.

Chicago/Turabian Style

Hoon-Chul Shin; Soo-Hwan Cho. 2019. "A Study on Measurement Method of Flicker in Korean Distribution Power System Using Old-version IEC Flickermeter." The Transactions of The Korean Institute of Electrical Engineers 68, no. 3: 393-398.

Original article
Published: 05 February 2019 in Journal of Electrical Engineering & Technology
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Nowadays, it is a very essential issue to detect and recognize power quality (PQ) disturbances as soon as possible, because it can give very important information by which various kinds of power quality mitigation devices can respond for each phenomenon quickly and to capture the interested waveform parts instantaneously, and so on. Also, it can be widely used as a trigger or reference signal for data mining to determine the existence of anomalies in the power system. We have studied some applications of Teager Energy Operator (TEO) and its adjunctive techniques known as Discrete Energy Operation Algorithm (DESA) to classify and detect the waveform distortions such as harmonics, inter-harmonics and frequency variation and the voltage synchronization. This paper is written to propose an effective detection method of voltage and frequency fluctuation based on TEO/DESA combined with Short-Time Fourier Transform (STFT), which is designed to overcome the drawback of the former study, a combined TEO and STFT method.

ACS Style

Soo-Hwan Cho; Hoon-Chul Shin; Jae-Bum Lee; Ho-Sung Jung; Seung-Kwon Shin. An Effective Detection Method of Voltage and Frequency Fluctuations Based on a Combination of TEO/DESA and STFT Analysis. Journal of Electrical Engineering & Technology 2019, 14, 985 -991.

AMA Style

Soo-Hwan Cho, Hoon-Chul Shin, Jae-Bum Lee, Ho-Sung Jung, Seung-Kwon Shin. An Effective Detection Method of Voltage and Frequency Fluctuations Based on a Combination of TEO/DESA and STFT Analysis. Journal of Electrical Engineering & Technology. 2019; 14 (2):985-991.

Chicago/Turabian Style

Soo-Hwan Cho; Hoon-Chul Shin; Jae-Bum Lee; Ho-Sung Jung; Seung-Kwon Shin. 2019. "An Effective Detection Method of Voltage and Frequency Fluctuations Based on a Combination of TEO/DESA and STFT Analysis." Journal of Electrical Engineering & Technology 14, no. 2: 985-991.

Journal article
Published: 01 May 2017 in The Transactions of The Korean Institute of Electrical Engineers
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Optimal Sizing Method of Distributed Energy Resources for a Stand-alone Microgrid by using Reliability-based Genetic Algorithm Stand-alone microgrid;Genetic algorithm;Optimal sizing;Distributed energy resources; As the reduction of greenhouse gases(GHGs) emission has become a global issue, the microgrid markets are growing rapidly. With the sudden changes in the market, Korean government suggested a new business model called 'Self-Sufficient Energy Islands'. Its main concern is a stand-alone microgrid composed of Distributed Energy Resources(DERs) such as Renewable Energy Sources(RESs), Energy Storage System(ESS) and Fuel Cell, in order to minimize the emission of GHGs. According to these trend, this paper is written to propose an optimal sizing method of DERs in a stand-alone microgrid by using Genetic Algorithm(GA), one of the representative stochastic methods. It is to minimize the net present cost with the variables, size of RESs and ESS. In the process for optimization, the sunless days are considered as additional constraints. Through the case study analysis, the size of DERs installed in a microgrid system has been computed using the proposed method in MATLAB. And the result of MATLAB is compared with that of HOMER(Hybrid Optimization of Multiple Energy Resources), a well-known energy modeling software.

ACS Style

Ja-Hyun Baek; Soo-Kyung Han; Dae-Sik Kim; Dong-Hwa Han; Hansang Lee; Soo-Hwan Cho. Optimal Sizing Method of Distributed Energy Resources for a Stand-alone Microgrid by using Reliability-based Genetic Algorithm. The Transactions of The Korean Institute of Electrical Engineers 2017, 66, 757 -764.

AMA Style

Ja-Hyun Baek, Soo-Kyung Han, Dae-Sik Kim, Dong-Hwa Han, Hansang Lee, Soo-Hwan Cho. Optimal Sizing Method of Distributed Energy Resources for a Stand-alone Microgrid by using Reliability-based Genetic Algorithm. The Transactions of The Korean Institute of Electrical Engineers. 2017; 66 (5):757-764.

Chicago/Turabian Style

Ja-Hyun Baek; Soo-Kyung Han; Dae-Sik Kim; Dong-Hwa Han; Hansang Lee; Soo-Hwan Cho. 2017. "Optimal Sizing Method of Distributed Energy Resources for a Stand-alone Microgrid by using Reliability-based Genetic Algorithm." The Transactions of The Korean Institute of Electrical Engineers 66, no. 5: 757-764.

Journal article
Published: 01 July 2016 in The Transactions of The Korean Institute of Electrical Engineers
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Analysis of Electricity Cost Saving Effect by the Optimal load shifting Operation with 1MWh Redox Flow Battery Energy storage system;Redox Flow Battery(RFB);Electricity cost saving;Operating time-interval; In recent years, the energy storage systems such as LiB, NaS, RFB(Redox-Flow Battery), Super- capacitor, pumped hydro storage, flywheel, CAES(Compressed Air Energy Storage) and so on have received great attention as practical solutions for the power supply problems. They can be used for various purpose of peak shaving, load leveling and frequency regulation, according to the characteristics of each ESS(energy storage system). This paper will focus at 1 MWh RFB system, which is being developed through the original technology project of energy material. The output of ESS is mainly characterized by C-rate, which means that the total rated capacity of battery will be delivered in 1 hour. And it is a very important factor in the ESS operation scheduling. There can be several options according to the operation intervals 15, 30 and 60minutes. The operation scheduling is based on the optimization to minimize the daily electricity cost. This paper analyzes the cost-saving effects by the each operating time-interval in case that the RFB ESS is optimally scheduled for peak shaving and load leveling.

ACS Style

Ja-Hyun Baek; Eun-Young Ko; Tae-Hyuk Kang; Han-Sang Lee; Soo-Hwan Cho. Analysis of Electricity Cost Saving Effect by the Optimal load shifting Operation with 1MWh Redox Flow Battery. The Transactions of The Korean Institute of Electrical Engineers 2016, 65, 1151 -1160.

AMA Style

Ja-Hyun Baek, Eun-Young Ko, Tae-Hyuk Kang, Han-Sang Lee, Soo-Hwan Cho. Analysis of Electricity Cost Saving Effect by the Optimal load shifting Operation with 1MWh Redox Flow Battery. The Transactions of The Korean Institute of Electrical Engineers. 2016; 65 (7):1151-1160.

Chicago/Turabian Style

Ja-Hyun Baek; Eun-Young Ko; Tae-Hyuk Kang; Han-Sang Lee; Soo-Hwan Cho. 2016. "Analysis of Electricity Cost Saving Effect by the Optimal load shifting Operation with 1MWh Redox Flow Battery." The Transactions of The Korean Institute of Electrical Engineers 65, no. 7: 1151-1160.

Journal article
Published: 01 February 2016 in The Transactions of The Korean Institute of Electrical Engineers
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Determining the Optimal Capacities of Distributed Generators Installed in A Stand-alone Microgrid Power System Stand-alone microgrid;Distributed generators;Renewable resources; In recent years, the power demand has been increasing steadily and the occurrence of maximum power demand has been moving from the summer season to the winter season in Korea. And since the control of electric power supply and demand is more important under those situations, a micro-grid system began to emerge as a keyword for the sTable operation of electric power system. A micro-gird power system is composed of various kinds of distributed generators(DG) such as small diesel generator, wind turbine, photo-voltaic generator and energy storage system(ESS). This paper introduces a method to determine the optimal capacities of the distributed generators which are installed in a stand-alone type of microgrid power system based on the fundamental proportion of diesel generator. At first, the fundamental proportion of diesel generator will be determined by changing from 0 to 50 percent. And then we will optimize the capacities of renewable energy resources and ESS according to load patterns. Lastly, after recalculating the capacity of ESS with consideration for SOC constraints, the optimal capacities of distributed generators will be decided.

ACS Style

Eun-Young Ko; Ja-Hyun Baek; Tae-Hyuk Kang; Dong-Hwa Han; Soo-Hwan Cho. Determining the Optimal Capacities of Distributed Generators Installed in A Stand-alone Microgrid Power System. The Transactions of The Korean Institute of Electrical Engineers 2016, 65, 239 -246.

AMA Style

Eun-Young Ko, Ja-Hyun Baek, Tae-Hyuk Kang, Dong-Hwa Han, Soo-Hwan Cho. Determining the Optimal Capacities of Distributed Generators Installed in A Stand-alone Microgrid Power System. The Transactions of The Korean Institute of Electrical Engineers. 2016; 65 (2):239-246.

Chicago/Turabian Style

Eun-Young Ko; Ja-Hyun Baek; Tae-Hyuk Kang; Dong-Hwa Han; Soo-Hwan Cho. 2016. "Determining the Optimal Capacities of Distributed Generators Installed in A Stand-alone Microgrid Power System." The Transactions of The Korean Institute of Electrical Engineers 65, no. 2: 239-246.

Journal article
Published: 01 November 2015 in Journal of Electrical Engineering & Technology
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ACS Style

Je-Ho Yoo; Seung-Kwon Shin; Jong-Young Park; Soo-Hwan Cho. Advanced Railway Power Quality Detecting Algorithm Using a Combined TEO and STFT Method. Journal of Electrical Engineering & Technology 2015, 10, 2442 -2447.

AMA Style

Je-Ho Yoo, Seung-Kwon Shin, Jong-Young Park, Soo-Hwan Cho. Advanced Railway Power Quality Detecting Algorithm Using a Combined TEO and STFT Method. Journal of Electrical Engineering & Technology. 2015; 10 (6):2442-2447.

Chicago/Turabian Style

Je-Ho Yoo; Seung-Kwon Shin; Jong-Young Park; Soo-Hwan Cho. 2015. "Advanced Railway Power Quality Detecting Algorithm Using a Combined TEO and STFT Method." Journal of Electrical Engineering & Technology 10, no. 6: 2442-2447.

Journal article
Published: 01 June 2015 in The Transactions of The Korean Institute of Electrical Engineers
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ACS Style

Je-Ho Yoo; Jin Hur; Jun-Min Cha; Tae-Gyun Kim; Bu-Il Kang; Soo-Hwan Cho. Determination of Reasonable Amounts of Under-Voltage Load Shedding for 765kV T/L According to the Power System Reliability Standards. The Transactions of The Korean Institute of Electrical Engineers 2015, 64, 845 -851.

AMA Style

Je-Ho Yoo, Jin Hur, Jun-Min Cha, Tae-Gyun Kim, Bu-Il Kang, Soo-Hwan Cho. Determination of Reasonable Amounts of Under-Voltage Load Shedding for 765kV T/L According to the Power System Reliability Standards. The Transactions of The Korean Institute of Electrical Engineers. 2015; 64 (6):845-851.

Chicago/Turabian Style

Je-Ho Yoo; Jin Hur; Jun-Min Cha; Tae-Gyun Kim; Bu-Il Kang; Soo-Hwan Cho. 2015. "Determination of Reasonable Amounts of Under-Voltage Load Shedding for 765kV T/L According to the Power System Reliability Standards." The Transactions of The Korean Institute of Electrical Engineers 64, no. 6: 845-851.

Journal article
Published: 01 March 2015 in The Transactions of The Korean Institute of Electrical Engineers
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ACS Style

Jiyoung Eum; Hyeong-Jin Choi; Soo-Hwan Cho. PV Power Prediction Models for City Energy Management System based on Weather Forecast Information. The Transactions of The Korean Institute of Electrical Engineers 2015, 64, 393 -398.

AMA Style

Jiyoung Eum, Hyeong-Jin Choi, Soo-Hwan Cho. PV Power Prediction Models for City Energy Management System based on Weather Forecast Information. The Transactions of The Korean Institute of Electrical Engineers. 2015; 64 (3):393-398.

Chicago/Turabian Style

Jiyoung Eum; Hyeong-Jin Choi; Soo-Hwan Cho. 2015. "PV Power Prediction Models for City Energy Management System based on Weather Forecast Information." The Transactions of The Korean Institute of Electrical Engineers 64, no. 3: 393-398.

Journal article
Published: 01 July 2014 in Journal of Electrical Engineering & Technology
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ACS Style

Soo-Hwan Cho; Jin Hur; Il-Yop Chung. An Applicability of Teager Energy Operator and Energy Separation Algorithm for Waveform Distortion Analysis : Harmonics, Inter-harmonics and Frequency Variation. Journal of Electrical Engineering & Technology 2014, 9, 1210 -1216.

AMA Style

Soo-Hwan Cho, Jin Hur, Il-Yop Chung. An Applicability of Teager Energy Operator and Energy Separation Algorithm for Waveform Distortion Analysis : Harmonics, Inter-harmonics and Frequency Variation. Journal of Electrical Engineering & Technology. 2014; 9 (4):1210-1216.

Chicago/Turabian Style

Soo-Hwan Cho; Jin Hur; Il-Yop Chung. 2014. "An Applicability of Teager Energy Operator and Energy Separation Algorithm for Waveform Distortion Analysis : Harmonics, Inter-harmonics and Frequency Variation." Journal of Electrical Engineering & Technology 9, no. 4: 1210-1216.

Journal article
Published: 31 May 2014 in International Journal of Smart Home
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ACS Style

D. Kowm; M. Kim; C. Hong; Soo-Hwan Cho. Artificial Neural Network based Short Term Load Forecasting. International Journal of Smart Home 2014, 8, 145 -150.

AMA Style

D. Kowm, M. Kim, C. Hong, Soo-Hwan Cho. Artificial Neural Network based Short Term Load Forecasting. International Journal of Smart Home. 2014; 8 (3):145-150.

Chicago/Turabian Style

D. Kowm; M. Kim; C. Hong; Soo-Hwan Cho. 2014. "Artificial Neural Network based Short Term Load Forecasting." International Journal of Smart Home 8, no. 3: 145-150.

Journal article
Published: 01 February 2014 in The Transactions of The Korean Institute of Electrical Engineers
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ACS Style

Soo-Hwan Cho. A Synthetical Study on Power Quality Measurement of Grid-Connected Wind Turbine Generating System based on the IEC International Standards. The Transactions of The Korean Institute of Electrical Engineers 2014, 63, 197 -204.

AMA Style

Soo-Hwan Cho. A Synthetical Study on Power Quality Measurement of Grid-Connected Wind Turbine Generating System based on the IEC International Standards. The Transactions of The Korean Institute of Electrical Engineers. 2014; 63 (2):197-204.

Chicago/Turabian Style

Soo-Hwan Cho. 2014. "A Synthetical Study on Power Quality Measurement of Grid-Connected Wind Turbine Generating System based on the IEC International Standards." The Transactions of The Korean Institute of Electrical Engineers 63, no. 2: 197-204.

Journal article
Published: 31 January 2014 in International Journal of Multimedia and Ubiquitous Engineering
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ACS Style

D. Kown; M. Kim; C. Hong; Soo-Hwan Cho. Short Term Load Forecasting based on BPL Neural Network with Weather Factors. International Journal of Multimedia and Ubiquitous Engineering 2014, 9, 415 -424.

AMA Style

D. Kown, M. Kim, C. Hong, Soo-Hwan Cho. Short Term Load Forecasting based on BPL Neural Network with Weather Factors. International Journal of Multimedia and Ubiquitous Engineering. 2014; 9 (1):415-424.

Chicago/Turabian Style

D. Kown; M. Kim; C. Hong; Soo-Hwan Cho. 2014. "Short Term Load Forecasting based on BPL Neural Network with Weather Factors." International Journal of Multimedia and Ubiquitous Engineering 9, no. 1: 415-424.

Journal article
Published: 17 April 2012 in IEEE Transactions on Power Delivery
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This paper presents a simple and efficient power-quality (PQ) evaluation method based on the half-cycle root-mean-square (H-RMS) calculation, which can be easily applied to waveform distortions processed from instantaneous values. PQ disturbances, especially related to voltage magnitude variations, can be generally divided into two categories by the measuring method: One is the rms-based PQ events, which include voltage sag, swell, undervoltage, overvoltage, and interruption, which are defined by the magnitude variations in terms of rms values. The other is the instantaneous value-based PQ events, which include transient, noise, harmonics, interharmonics, and flicker (or voltage fluctuation), some of which are assessed by the raw data or processed through frequency analysis and filtering. According to the fundamental characteristic and definition of each PQ event, the acquired signal data should be processed through the different routes. This study shows that the H-RMS-based measuring process can be usefully applied to quantify the instantaneous value-based PQ events, especially in regards to waveform distortions, such as harmonic distortion and flicker, which can be assessed by the IEC flicker severity index (Pst) and the equivalent 10-Hz flicker index (ΔV10).

ACS Style

Soo-Hwan Cho; Chang-Hyun Park; Jonghoon Han; Gilsoo Jang. A Waveform Distortion Evaluation Method Based on a Simple Half-Cycle RMS Calculation. IEEE Transactions on Power Delivery 2012, 27, 1461 -1467.

AMA Style

Soo-Hwan Cho, Chang-Hyun Park, Jonghoon Han, Gilsoo Jang. A Waveform Distortion Evaluation Method Based on a Simple Half-Cycle RMS Calculation. IEEE Transactions on Power Delivery. 2012; 27 (3):1461-1467.

Chicago/Turabian Style

Soo-Hwan Cho; Chang-Hyun Park; Jonghoon Han; Gilsoo Jang. 2012. "A Waveform Distortion Evaluation Method Based on a Simple Half-Cycle RMS Calculation." IEEE Transactions on Power Delivery 27, no. 3: 1461-1467.

Journal article
Published: 15 April 2012 in Advanced Science Letters
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ACS Style

Jong-Hoon Han; Gilsoo Jang; Soo-Hwan Cho. Three-Phase Power Flow Application for a Closed-Loop Distribution System Considering Deployment of Distributed Generation and TCPST. Advanced Science Letters 2012, 8, 749 -753.

AMA Style

Jong-Hoon Han, Gilsoo Jang, Soo-Hwan Cho. Three-Phase Power Flow Application for a Closed-Loop Distribution System Considering Deployment of Distributed Generation and TCPST. Advanced Science Letters. 2012; 8 (1):749-753.

Chicago/Turabian Style

Jong-Hoon Han; Gilsoo Jang; Soo-Hwan Cho. 2012. "Three-Phase Power Flow Application for a Closed-Loop Distribution System Considering Deployment of Distributed Generation and TCPST." Advanced Science Letters 8, no. 1: 749-753.

Journal article
Published: 15 April 2012 in Advanced Science Letters
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ACS Style

Soo-Hwan Cho; Sang-Gyun Kang. Application of the Combined Kalman Filter and Root-Mean-Square Method to Detection of Voltage Fluctuation. Advanced Science Letters 2012, 8, 649 -653.

AMA Style

Soo-Hwan Cho, Sang-Gyun Kang. Application of the Combined Kalman Filter and Root-Mean-Square Method to Detection of Voltage Fluctuation. Advanced Science Letters. 2012; 8 (1):649-653.

Chicago/Turabian Style

Soo-Hwan Cho; Sang-Gyun Kang. 2012. "Application of the Combined Kalman Filter and Root-Mean-Square Method to Detection of Voltage Fluctuation." Advanced Science Letters 8, no. 1: 649-653.