• 풍력에너지저널
• /
• 제14권1호
• /
• pp.44-51
• /
• 2023

Some controllers have been introduced in various studies to mitigate the negative effects of renewable sources. These have been modified to fit a formed solution in various ways. This paper deals with the voltage regulation of wind farms in voltage dip situations where communication failures occur. The aim is to discuss the modification of the online wind farm management system. To discuss modifications of the online wind farm management system, we focus on voltage regulation of wind farms when communication failures occur. The structure has been designed to respond to a voltage drop when the outer reference is absent due to communication errors. Since the loss reduction effect has been maintained in the designed case studies, it can be derived that the proposed method can respond to voltage drops, along with a used objective function.

• 조명전기설비학회논문지
• /
• 제29권7호
• /
• pp.28-37
• /
• 2015

Owing to the variability of large-scaled wind power system, the development of wind farm management technologies and related compensation methods have been receiving attention. To provide an accurate and reliable output power, certain wind farm adopts a specified management system including a wind prediction model and grid expectation solutions for considering grid condition. Those technologies are focused on improving the reliability and stability issues of wind farms, which can affect not only nearby system devices but also a voltage condition of utility grid. Therefore, to adapt the develop management system, an expectation process about voltage condition of Point of Common Coupling should be integrated in operating system for responding system requirements in real-time basis. This paper introduce a grid imposing method for a real-time based wind farm management system. The expected power can be transferred to the power flow section and the required quantity about reactive power can be calculated through the proposed system. For the verification process, the gauss-seidel method is introduced in the Matlab/Simulink for analysing power flow condition. The entire simulation process was designed to interwork with PSCAD for verifying real power system condition.

• 경영과학
• /
• 제33권1호
• /
• pp.35-47
• /
• 2016

Generation of electricity using wind power has received considerable attention worldwide in recent years mainly due to its minimal environmental impact. However, volatility of wind power production causes additional problems to provide reliable electricity to an electrical grid regarding power system operations, power system planning, and wind farm operations. Those problems require appropriate stochastic models for the electricity generation output of wind power. In this study, we review previous literatures for developing the stochastic model for the wind power generation, and propose a systematic procedure for developing a stochastic model. This procedure shows a way to build an ARIMA model of volatile wind power generation using historical data, and we suggest some important considerations. In addition, we apply this procedure into a case study for a wind farm in the Republic of Korea, Shinan wind farm, and shows that our proposed model is helpful for capturing the volatility of wind power generation.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2015년도 제46회 하계학술대회
• /
• pp.247-248
• /
• 2015

Wind turbines causes instabilities on the grid as their penetration increase. To mitigate harmful effects from wind turbines, transmission system operator(TSO) set up some requirements to obligate for wind generation operator for grid connection. So wind farm management system(WFMS) has important role to follow requirement from TSO, WFMS calculates available real power by considering wake effects, and dispatches real power order to each wind turbine in wind farm to optimize for decreasing load fatigue. To verify operation of WFMS, real-time simulator(RTS) is necessary. This paper deals with RTS configuration to verify WFMS operation. RTS includes wind farm model and power flow code. Normally, wind farm equivalent simple model makes wind turbines in wind farm to one wind turbine mode which cannot verify power flow in wind farm and WFMS operation. Thus, this paper makes wind farm model using simple wind turbine model with transfer function. Matlab is used for make power flow code and wind farm model to impose RTS and those model is certified by PSCAD/EMTDC.

• 한국멀티미디어학회논문지
• /
• 제25권8호
• /
• pp.1097-1108
• /
• 2022

This paper aimed to design and implement an EMS for real-time power generation control based on wake effect optimization of wind farm, and then to test it in commercial operating wind farm. For real-time control, we proposed the wake band-based optimization and setting the wake effect distance limit, and when the wake effect distance limit was set to 7D in the actual wind farm layout, the calculation time was improved by about 93.94%. In addition, we designed and implemented the script-based EMS for flexible operation logic management in preparation for unexpected issues during testing, and it was installed and tested on a wind farm in commercial operation. However, three issues arose during the testing process. These are the communication interface problem of meteorological tower, the problem of an abnormal wake effect, and the problem of wind turbine yaw control. These issues were solved by modifying the operation logic using EMS's script editor, and the test was successfully completed in the wind farm in commercial operation.

• 제어로봇시스템학회논문지
• /
• 제20권1호
• /
• pp.22-28
• /
• 2014

This paper proposes the fuzzy modeling and robust stability analysis of wind farm based on prediction model for wind speed. Owing to the sensitivity of wind speed, it is necessary to study the dynamic equation of the variable speed wind turbine. In this paper, based on the least-square method, the wind speed prediction model which is varied by the surrounding environment is proposed so that it is possible to evaluate the practicability of our model. And, we propose the composition of intelligent wind farm and use the fuzzy model which is suitable for the design of fuzzy controller. Finally, simulation results for wind farm which is modeled mathematically are demonstrated to visualize the feasibility of the proposed method.

• 경영과학
• /
• 제30권2호
• /
• pp.97-106
• /
• 2013

Of the new and renewable energies currently being pursued domestically, wind energy, together with solar photovoltaic energy, is a new core growth driver industry of Korea. As of May 2012, 33 wind farms at a capacity of 347.8MW are in operation domestically. The purpose of this study was to compare and analyze how efficiently each operational wind farm is utilizing its power generation capacity and the weather resource of wind. For this purpose, the study proceeded in 3 phases. In phase 1, ANOVA analysis was performed for each wind farm, thereby categorizing farms according to capacity, region, generator manufacturer, and quantity of weather resources available and comparing and analyzing the differences among their operating efficiency. In phase 2, for comparative analysis of the operating efficiency of each farm, Data Envelopment Analysis (DEA) was used to calculate the efficiency index of individual farms. In the final phase, phase 3, regression analysis was used to analyze the effects of weather resources and the operating efficiency of the wind farm on the power generation per unit equipment. Results shows that for wind power generation, only a few farms had relatively high levels of operating efficiency, with most having low efficiency. Regression analysis showed that for wind farms, a 1 hour increase in wind speeds of at least 3m/s resulted in an average increase of 0.0000045MWh in power generation per 1MW generator equipment capacity, and a unit increase in the efficiency scale was found to result in approximately 0.20MWh power generation improvement per unit equipment.

• 한국해안·해양공학회논문집
• /
• 제33권5호
• /
• pp.179-186
• /
• 2021

재생에너지 3020 이행계획, 한국판 뉴딜 계획 등에 따라 신재생에너지 생산 비중 증가 대응과 해상풍력발전 12GW 건설을 위해 어업생활권 점유 대안 마련과 주민 수용성 제고를 위한 방안이 요구된다. 본 연구는 동해에 적합한 해상풍력발전단지와 연계한 수산자원 공존모델의 차별방안을 제시하였다. 동해는 부유식 해상풍력 발전단지 조성의 최적지로 단지 내 공유수면을 활용하여 외해양식에 적합한 고부가가치 어종인 참다랑어를 양식함으로써 에너지 생산, 수산자원 개발, 관광산업화를 통한 이익 창출로 경제적 효과 발생을 예측하였다. 또한, 운영관리 기술 공유 등으로 예산 감축, 스마트 관리 추진과 어민소득 증대 가능성을 확인하였다.

• 디지털융복합연구
• /
• 제11권2호
• /
• pp.137-148
• /
• 2013

본 논문의 목적은 항만해상풍력단지 건설을 위한 기술개발 로드 맵을 제시하는 것이다. FGI(Focus Group Interview)와 설문지를 이용한 AHP(Analytical Hierarchy Process) 방법을 적용해서 대/중/소 분류된 건설기술의 가중치를 도출했고, 분류된 건설기술에 대한 우선순위를 근거로 항만해상풍력단지 건설기술 로드 맵이 수립되었다. 기술 로드 맵은 항만해상풍력단지의 분류된 건설기술에 대한 R&D 사업을 달성하기 위한 20년간(2016년부터 2036년 까지)의 일정을 제시하고 있다. 이러한 건설기술 로드 맵은 녹색항만건설산업의 R&D 전략을 수립하기 위한 이정표로 활용될 수 있다.

• 한국지리정보학회지
• /
• 제17권4호
• /
• pp.86-100
• /
• 2014

본 연구의 목적은 산지 내 풍력발전단지 입지 적합성 분석을 통해 입지선정 가이드라인과 산지 훼손 최소화를 위한 제도적 개선방안을 도출하는 것이다. 먼저 풍력발전단지 입지 적합성 분석을 위해 국내외 사례 및 현장조사, 연구문헌 고찰을 통해 산지 내 풍력발전단지 입지선정을 위한 요인을 도출하고, 요인별 세부항목 및 가중치를 결정하여 이를 바탕으로 각 항목별 세부평가기준을 수립함으로써 입지 적합성 모델을 개발하였다. 강원도를 사례지역으로 선정하여 풍력자원 밀도 데이터, 법적 산지보전지역, 입지 기준 요인 항목별 자료를 토대로 공간 DB를 구축하여 산지 내 풍력발전 입지가능지역을 도출하였다. 일정 개수 이상의 풍력발전기가 입지할 수 있는 풍력발전단지 잠재 입지가능면적의 추정을 위해서 본 연구에서는 근린분석방법인 Block Statistics와 Focal Statistics 방법을 이용하였다. 그 결과 Block Statistics 방법에 의한 풍력발전기 잠재적 입지가능 면적은 1,261ha이며, Focal Statistics 방법에 의한 풍력발전기 잠재적 입지가능 면적은 1,411ha으로 나타났다. 본 연구의 결과를 바탕으로 대규모 절성토에 의한 산림재해 발생 우려 및 산지경관 훼손을 방지하기 위한 저감대책이 마련되어야 할 것이다.