• 대한전기학회논문지:전력기술부문A
• /
• 제55권12호
• /
• pp.536-543
• /
• 2006

This paper uses Monte Carlo technique, which is one of probabilistic methods of estimating the economical quantity of electric power generation in consideration of voltage stability in the aspect of power generation companies. In the power exchange system in Korea, when power generation companies participate in tenders for power generation capacity at the power exchange, they need to determine their power supply capacity considering the stability of electric power system. Thus, we purposed to propose an algorithm for estimating economical power generation capacity in theaspect of power generation companies, through which we can estimate the margin for voltage stability through P-V curve analysis by capacity according to the change of power generation capacity in a simulated system and to conduct Monte Carlo simulation in consideration of the margin

• 한국항해항만학회지
• /
• 제33권6호
• /
• pp.381-385
• /
• 2009

일반적으로 해양 시설물은 대부분 태양광 기반의 발전 시스템으로 구성된다. 태양광 발전 시스템은 날씨의 광량에 따라 변화한다. 태양광 발전 시스템은 흐린 날과 비오는 날에 전력 생산량이 감소한다. 태양광 발전량이 부족해지면 해양 시설물에 전력 부족이 발생한다. 이러한 문제를 해결하기 위하여 본 논문은 태양광과 파력 시스템을 복합한 하이브리드 발전 제어 시스템을 제안한다. 파력 발전 시스템은 웰스 터빈과 영구자석 발전기로 구성되어 있다. 제안하는 시스템을 특별한 지역에 설치하고 태양광 발전 전력과 파력 발전 전력을 측정하였다. 실험결과 태양광 전력은 파력에 비하여 안정적인 전원이다. 그러나 파력은 태양이 없는 동안에도 전력을 공급할 수 있다. 제안하는 하이브리드 시스템의 전력 특성이 태양광 시스템에 비하여 높은 안정성을 갖는 것을 알 수 있다.

• 조명전기설비학회논문지
• /
• 제26권7호
• /
• pp.52-58
• /
• 2012

In this study, we have investigated the effect of the solar power generation facilities on the power quality of interconnected solar power generation system. When the solar power generation facility was connected to the distribution system, whether the solar power generation is under operation or not, Peak factor of current was increased to 0.033[%], Frequency is deviated from $60{\pm}0.2$[Hz] and also Short term flicker indication($P_{st}$) increased to 0.213[p.u.] compare with the disconnected situation. Harmonic current [%] in orders was 11.42[%] maximum under 11th orders and was 7.861[%] between 11th and 17th orders. These values were about 3 or 4 times compared with "the power system interconnection technique standards" at the same situation above. Therefore, we could confirmed that the solar power generation facility, when it was connected to the existing distribution system, made bad influence on the power qualities such as the peak factor of current, frequency regulation, short term flicker indication($P_{st}$) and harmonic current [%] in orders etc.

• Journal of Power Electronics
• /
• 제2권1호
• /
• pp.11-18
• /
• 2002

The development of the solar and the wind energy is necessary since the future alternative energies that have no pollution and no limitation are restricted. Currently MW Class power generation system has been developed, but it still has a few faults with the weather condition. In order to solve these existing problems, combined generation system of photovoltaic and wind power was suggested. It combines wind power energy and solar energy to have the supporting effect from each other. However, since even combined generation system cannot always generate stable output with everchanging weather condition, power storage apparatus that uses elastic energy of spiral spring to combined generation system was also added for the present study.

• 전기학회논문지P
• /
• 제51권4호
• /
• pp.169-174
• /
• 2002

The developments of the solar and the wind power energy are neccessary since the future alternative energies that have no pollution and no limitation are restricted. Currently power generation system of existing problems, combined generation system of photovoltaic(400W) and wind power generation system(400W) was suggested. It combines wind power and solar energy to have the supporting effect from each other. However, weather condition, power compensation device that uses elastic energy of spiral spring to combined generation system was also added for the present study. In an experiment, when output of system gets lower than 12V(charging voltage), power was continuously supplied to load through the inverter by charging energy obtained from generating rotary energy of spiral spring operates in small scale generator.

• 한국전기전자재료학회:학술대회논문집
• /
• 한국전기전자재료학회 2004년도 추계학술대회 논문집
• /
• pp.33-37
• /
• 2004

Photovoltaic energy and wind energy are highly dependent on the season, time and extremely intermittent energy sources. Because of these reasons, in view of the reliability the photovoltaic and the wind power generation system have many problems(energy conversion, energy storage, load control etc.) comparing with conventional power plant. In order to solve these existing problems, hybrid generation system composed of photovoltaic(500W) and wind power system(400W) was suggested But, hybrid generation system cannot always generate stable output due to the varying weather condition So, the auxiliary power compensation unit that uses elastic energy of spiral spring was added to hybrid generation system for the present study. It was partly confirmed that hybrid generation system was generated a stable outputs by spiral spring was continuously provided to load.

• 전력전자학회논문지
• /
• 제12권2호
• /
• pp.174-182
• /
• 2007

신재생에너지 중에서 태양광 에너지가 중요 에너지원으로서 각광받고 있고 적용이 증대되고 있다. 특히, 미래에는 하이브리드 태양광 발전 시스템이 독립 분산 전원 시스템으로 널리 사용될 것으로 예상되고 있다. 본 논문에서는 DC전력을 기계적인 접촉에 의해 전달하는 것보다는 마그네틱 커플링에 의해 비접촉으로 에너지를 전달 할 수 있는 무접점전원장치를 사용한 직류수용가 서비스 태양광발전시스템을 제안하였다. 제안 적용된 무접점 전원장치는 무접점 변압기와 Half-bridge LLC 공진컨버터, 영 전압 스위칭 Boost컨버터로 구성되어 있다.

• 제어로봇시스템학회논문지
• /
• 제8권12호
• /
• pp.1031-1035
• /
• 2002

The development of the solar and the wind power energy is necessary since the future alternative energies should have no pollution and no limitation. currently power generation system of MW scale has been developed, but it still has a few faults that its operation depends on with the weather condition. In order to solve these existing problems. combined generation system of photovoltaic(400W) and wind power generation system(400W) was suggested. It combines wind power and solar energy to have the supporting effect from each other. However. since the combined generation system cannot always generate stable output with ever-changing weather condition, power compensation device that uses elastic energy of spiral spring was added. In an experiment. when output of system gets lower than 12V(charging voltage), additional power was from the stored rotational energy of spiral spring.

• 전기학회논문지
• /
• 제59권10호
• /
• pp.1718-1726
• /
• 2010

Utilization of renewable energy is becoming increaingly important from the viewpoints of environmental protection and conservation of fossil fuel. However, the generating power of renewable energy is always fluctuating due to the environmental status. This paper presents a scheme for supervisory control of wind generation system with the energy storage and STATCOM to reduce the power variation. In this paper, we especially concentrate on constant power output control of wind generation system. In order to achieve this purpose, the coordinated control strategy between different types of energy storage system and reactive power compensation device. The proposed control scheme has been validated by PSCAD/EMTDC simulation. As a result, the proposed scheme can handle the power output of wind generation system with a constant value.

• KEPCO Journal on Electric Power and Energy
• /
• 제8권1호
• /
• pp.21-29
• /
• 2022

Power generated from renewable energy has continuously increased recently. As the distributed generation begins to interconnect in the distribution system, an accurate generation forecasting has become important in efficient distribution planning. This paper explained method and current state of distributed power generation forecasting models. This paper presented selecting input and output variables for the forecasting model. In addition, this paper analyzed input variables and forecasting models that can use as mid-to long-term distributed power generation forecasting.