안정적인 계통 연계를 위한 풍력-태양광 하이브리드 시스템의 원격 전압 변동률 분석 및 제어 장치에 관한 연구

장미혜 ( Mi Hye Jang ),유영실 ( Young Sil You ),김성호 ( Sung Ho Kim ),이장호,( Jang Ho Jang ) 조선대학교 공학기술연구원 2013 공학기술논문지 Vol.6 No.4

We have been studied a data acquisition and control system of a wind-solar hybrid system for measuring and controlling a voltage fluctuations of a wind turbine system. The wind turbine system is installed out control area. So, it is so important for supervising to wind turbine of a maintenance, wind speed, optical resources wind turbine output, wind speed, wind direction, over voltage of a generator. This system can be supplied a data of over voltage, under voltage, voltage fluctuations of a wind-solar turbine for controlling an EMS : Energy Management System or a SCADA : Supervision Control and Data Acquisition at a constitute of a wind farm. The of voltage fluctuation system of a wind turbine is improving an electric power supply power quality of a distribution line and unspecified individuals of used wind-solar hybrid system.

Economic and Environmental Analysis of a Wind-Hybrid Power System with Desalination in Hong-do, South Korea

배기호,심준형 한국정밀공학회 2012 International Journal of Precision Engineering and Vol. No.

The economic and environmental benefits of wind turbine-kerosene generator hybrid power systems have been analyzed for stand-alone electricity supply and desalination in Hong-do, South Korea using a microgrid simulation program. We have analyzed the cost effectiveness of wind-hybrid systems in relation to the sensitivity of the designed power grid to increased electricity demand, increased or decreased fuel price, and decreased wind turbine capital cost. The environmental impacts of the wind-hybrid grid are also evaluated in respect of pollutant emission. As a result, we have clearly confirmed that the optimized wind-hybrid system can save on the total cost by almost half at a wide range of the wind speed, and fuel and capital costs compared to the current generator-only system. Operation of the desalination facility during the non-tourist season utilizing surplus wind electricity has been proven to be beneficiary. An increased wind speed necessitates less dependence on wind turbines and generators since batteries can store a sufficient amount of excessive electricity that can be used during periods of electricity generation deficit. Wind hybrid systems are also expected to yield significant environmental benefits.

소형화 및 슬림형에 적합한 평면 플라이백 변압기의최적 설계에 관한 연구

나혜중,김종해 한국전기전자학회 2020 전기전자학회논문지 Vol.24 No.3

This paper presents the optimal design of planar flyback transformer suitable for small-size and low-profile of AC toDC adapter for 10W tablet. This paper also proposes the injection winding transformer of Hybrid and Drum typescapable of the winding method of automatic type and the reduction of transformer size and leakage inductance(Lk)compared to the conventional mass-production flyback transformer with the winding method of manual type. Inparticular, the injection winding transformer of Drum type proposed in this paper is constructed in a horizontal laying ofits transformer to solve the connection problem of copper plate injection winding on the secondary side of the one ofHybrid type. The primary and secondary windings of the injection winding transformer of Hybrid and Drum types usedthe conventional winding and the copper plate injection winding, respectively. For the injection winding transformer ofHybrid and Drum types proposed in this paper, the optimal design of planar flyback transformer suitable for small-sizeand low-profile was carried out using Maxwell 2D and 3D tool. 본 논문에서는 10W급 Tablet용 AC to DC Adapter의 소형화 및 슬림형에 적합한 평면 Flyback 변압기 최적화 설계에 대해서 나타낸다. 또한 본 논문에서는 수동권선의 기존 양산 Flyback 변압기에 비해 자동권선, Trans 크기 저감 및 누설 인덕턴스(Lk) 저감이 가능한 Hybrid형 사출 권선 변압기와 Drum형 사출 권선 변압기를 제안한다. 특히 본 논문에서 제안한Drum형 사출 권선 변압기는 Hybrid형 사출 권선 변압기 2차측의 동판 사출 권선 접속 문제를 해결하기 위하여 변압기를 수평으로 눕힌 형태로 구성하였다. 본 논문에서 제안한 Hybrid형 사출 권선 변압기와 Drum형 사출 권선 변압기의 1차측과 2차측 권선은 각각 기존 권선과 동판 사출 권선을 사용하였다. 본 논문에서 제안한 Hybrid형 사출 권선 변압기와 Drum형 사출권선 변압기에 대해 Maxwell 2D 및 3D Tool을 이용하여 소형화 및 슬림형에 적합한 평면 Flyback 변압기 최적화 설계를수행하였다.

Urban Eco-GreenergyTM Hybrid Wind-Solar Photovoltaic Energy System and Its Applications

Wen Tong Chong,Wan Khairul Muzammil,Ahmad Fazlizan,Mohamad Reza Hassan,Hamid Taheri,Mohammed Gwani,Hiren Kothari,Sin Chew Poh 한국정밀공학회 2015 International Journal of Precision Engineering and Vol. No.

This paper introduces the Eco-GreenergyTM hybrid wind-solar photovoltaic energy generation system and its applications. The system is an integration of the novel omni-direction-guide-vane (ODGV) with a vertical axis wind turbine (VAWT). The ODGV is designed to surround the VAWT for wind power augmentation by creating a venturi effect to increase the on-coming wind speed before it interacts with the turbine blades. In wind tunnel tests, the ODGV improves the power output of the VAWT by 3.48 times compared with a bare VAWT at its peak torque. Furthermore, the rotor rotational speed of the wind turbine increased by 182% at 6 m/s of wind speed. A solar PV panel can be mounted on the top surface of the ODGV for solar energy generation. Estimation on wind-solar energy output shows that the system can generate a total of 572.8 kWh of energy per year. By comparison, the ODGV increases the annual wind energy output by 438%. The green energy generated from the hybrid system can be used to power LED lights or other appliances (e.g., CCTV camera).

Optimal Scheduling Algorithm for Residential Energy Consumption Considering the Wind-Photovoltaic Power and the Electricity Price of Purchase/Selling Electricity

Zhen Liu,Wen-zhu Li,Xin Liu 보안공학연구지원센터 2016 International Journal of Smart Home Vol.10 No.11

According to extensive development of renewable resources, such as wind power and photovoltaic power, and on the basis of wind-photovoltaic-energy storage hybrid power system, an optimal scheduling algorithm for residential energy consumption scheduling considering the wind -photovoltaic power and the electricity price of purchase/selling electricity is proposed. Firstly, in order to reduce the electricity cost of user and the burden of power supply, the appliances is arranged in the time-slot with purchase price more than selling price and higher wind -photovoltaic power based on the wind -photovoltaic power and the electricity price of purchase/selling electricity; Then, with the constraint conditions that purchase/selling electricity, the coordination strategy of wind-photovoltaic-energy storage grid is proposed. Simulation results show that the proposed optimization can decrease the electricity cost of user and peak-to-average.

Development of Efficient Operation Mode for Wind-Diesel Hybrid System

Furqan Asghar,Se-Yoon Kim,Sung Ho Kim 한국지능시스템학회 2014 한국지능시스템학회논문지 Vol.24 No.5

Hybrid wind Diesel stand-along systems are considered economically viable and effective to create balance between production and load demand in remote areas where the wind speed is considerable for electric generation, and also, electric energy is not easily available from the grid. In Wind diesel hybrid system, the wind energy system is the main constitute and diesel system forms the back up. This type of hybrid power system saves fuel cost, improves power capacity to meet the increasing demand and maintains the continuity of supply in the system. Problem we face in this system is that even after producing enough power through wind turbine system, considerable portion of this power needs to be dumped due to short term oversupply of power and to maintain the frequency within close tolerances. As a result remaining portion of total energy supplied comes from the diesel generator to overcome the temporal energy shortage. This scenario decreases the overall efficiency of hybrid power system. In this study, efficient Simulink modeling for wind-diesel hybrid system is proposed and some simulations study is carried out to verify the feasibility of the proposed scheme.

Development of Efficient Operational Mode for Wind-Diesel Hybrid System

Furqan Asghar,김세윤,김성호 한국지능시스템학회 2014 한국지능시스템학회논문지 Vol.24 No.5

Hybrid wind Diesel stand-alone power systems are considered economically viable and effective to create balance betweenproduction and load demand in remote areas where the wind speed is considerable for electric generation, and also, electricenergy is not easily available from the grid. In Wind diesel hybrid system, the wind energy system is the main constituteand diesel system forms the back up. This type of hybrid power system saves fuel cost, improves power capacity to meetthe increasing demand and maintains the continuity of supply in the system. Problem we face in this system is that evenafter producing enough power through wind turbine system, considerable portion of this power needs to be dumped due toshort term oversupply of power and to maintain the frequency within close tolerances. As a result remaining portion of totalenergy supplied comes from the diesel generator to overcome the temporal energy shortage. This scenario decreases theoverall efficiency of hybrid power system. In this study, efficient Simulink modeling for wind-diesel hybrid system is proposedand some simulations study is carried out to verify the feasibility of the proposed scheme.

Development of Efficient Operational Mode for Wind-Diesel Hybrid System

Asghar, Furqan,Kim, Se-Yoon,Kim, Sung Ho Korean Institute of Intelligent Systems 2014 한국지능시스템학회논문지 Vol.24 No.5

Hybrid wind Diesel stand-alone power systems are considered economically viable and effective to create balance between production and load demand in remote areas where the wind speed is considerable for electric generation, and also, electric energy is not easily available from the grid. In Wind diesel hybrid system, the wind energy system is the main constitute and diesel system forms the back up. This type of hybrid power system saves fuel cost, improves power capacity to meet the increasing demand and maintains the continuity of supply in the system. Problem we face in this system is that even after producing enough power through wind turbine system, considerable portion of this power needs to be dumped due to short term oversupply of power and to maintain the frequency within close tolerances. As a result remaining portion of total energy supplied comes from the diesel generator to overcome the temporal energy shortage. This scenario decreases the overall efficiency of hybrid power system. In this study, efficient Simulink modeling for wind-diesel hybrid system is proposed and some simulations study is carried out to verify the feasibility of the proposed scheme.

Profitable production of stable electrical power using wind-battery hybrid power systems: A case study from Mt. Taegi, South Korea

Sangwook Park,한권덕,Junmo Koo,Hyung Jong Choi,Joon Hyung Shim 한국정밀공학회 2019 International Journal of Precision Engineering and Vol.6 No.5

In this study, wind-battery hybrid power systems are designed, evaluated, and optimized for regular supply of electrical power at a designated minimum load level with no shortage. Our simulation uses lead-acid batteries and vanadium redox flow batteries (VRBs) for storage, and utilizes hourly wind speed data measured in 2012 at Mt. Taegi in South Korea. Twenty Vestas V80 wind turbines, each rated at 2 MW, are used as power generators, on the basis of an actual wind turbine project recently installed at Mt. Taegi. Sale to the main grid of electricity generated in excess of the minimum load offset the initial capital costs for installation of the wind turbines and batteries. Results show that the optimized wind-VRB hybrid system can supply more than 9 MW of regular electrical power at no cost. Even higher levels of production are profitable with sale of the wind-generated electricity directly to a demand site at a price greater than the price of sales to the main grid. A reduction in the VRB electrolyte costs and an increase in carbon taxes can also increase profitability.

Power Dispatch Capability of Wind-Battery Hybrid Power System

Cong-Long Nguyen,Hong-Hee Lee 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6

This paper focuses on determining the power dispatch capability of wind-battery hybrid power system (WBHPS). To cooperate with the transmission system operator (TSO) in the modern electric power market, the power dispatch capability of the WBHPS must be defined primarily at beginning of each dispatching time interval. Based on the wind power available and the battery capacity status, the power dispatch capability which means the power level of the WBHPS can dispatch to grid is determined. The proposed determination method aims to satisfy two crucial constraints while the wind power is being integrated into grid. The first constraint associated with the battery capacity is to guarantee the battery power lower than its rating. And, the second one is to keep the state of charge (SOC) of the battery within a safe range. In order to determine the maximum and minimum range of the power dispatch, the availability level of the wind power in each dispatching time interval is estimated based on the wind speed forecast. To evaluate the proposed determination method, we perform a numerical study using a 3-MW wind turbine generator with a real wind speed data measured on Jeju Island.