• Title/Summary/Keyword: PV generation

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Output Control Simulation of PV-AF Generation System under Various Weather Conditions (다양한 기상조건하에서의 AF기능을 갖는 태양광발전시스템의 출력제어 시뮬레이션)

  • Seong, Nak-Gueon;Park, Min-Won;Yu, In-Keun
    • Proceedings of the KIEE Conference
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    • 2002.07b
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    • pp.1364-1366
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    • 2002
  • The Photovoltaic(PV) generation system is a promising source of energy for the future. Since the need for renewable energy has been increased, the research of PV generation system has also been progressed. Recently, cost down of PV generation system has been accomplished and practical technologies of the solar energy developed, Moreover, grid connected PV generation system are becoming actual and general. Operational technology of the grid connected PV generation system is being a hot issue. Power output of PV system is directly affected by wether conditions. When AC power supply is needed, power conversion by an inverter and a MPPT control are necessary. In this paper, for stability improvement of PV generation system. Active filter(AF) function is added to PV generation system, and simulations of PV-AF system under various weather conditions are performed.

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A study on the MPPT tracking algorithm using angle control of flexible PV in BIPV (BIPV에서 Flexible PV의 각도 조절을 이용한 MPPT 추적 알고리즘 연구)

  • Kim, Jaejin
    • Journal of Korea Society of Digital Industry and Information Management
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    • v.13 no.3
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    • pp.27-33
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    • 2017
  • In this paper presents the MPPT tracking algorithm using angle control of flexible PV in BIPV. The proposed algorithm is based on MPPT tracking algorithm for curtain wall using flexible PV. It is an algorithm to find optimal power generation condition by controlling the angle of flexible PV using the air layer of window. The angle of flexible PV tests the power generation by separating the center of flexible PV into the interior angle in the interior direction and the external angle in the center of flexible PV. When the angle of flexible PV was used as interior angle, the generation amount was increased by 15.79% and increased by 8.45% compared with the external angle. MPPT tracking is performed on the generation amount of the interior angle which has the most power after comparing the generation amount according to the bending shape of the flexible PV. This algorithm can be the most efficient method for the curtain wall using flexible PV because the bending pattern with the greatest amount of power generation may be different because the environment of the building applying the curtain wall is different.

Comparison of Performance of Flexible Solar Cells construction applied to Curtain Walls (커튼 월에 적용하는 플랙시블 태양전지의 모양에 따른 성능 비교)

  • Kim, Jaejin
    • Journal of Korea Society of Digital Industry and Information Management
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    • v.14 no.4
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    • pp.163-168
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    • 2018
  • In this paper presents comparison of performance of flexible solar cells construction applied to curtain walls. The proposed paper compares power generation for curtain walls of various shapes using flexible PV. Through the comparison of performance, the power generation was compared by installing various types of flexible PV on the air layer of double windows. By comparing the measured power generation, it is possible to find an optimal flexible PV shape that can be applied to a curtain wall. Flexible PV installation was divided into diagonal, S and W shapes. As a result of comparison, the amount of power generation when there was no flexure of flexible PV was large. Also, as the angle with the light source increased, the power generation decreased. Therefore, it is necessary to study the structure which can fix the PV more than the flexible PV and to be able to direct the sun without distortion.

A Study on Correlation between Improvement in Efficiency of PV and Green roof of Public Building (공공건물 옥상녹화와 설치태양광(PV)의 효율향상 상관관계 연구)

  • Lee, Eung Jik
    • KIEAE Journal
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    • v.13 no.5
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    • pp.111-118
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    • 2013
  • This study aims to investigate advantages of complex installation of green roof and PV system in a public building, to analyze the impact of green roof on the efficiency of PV power generation, and to consider the correlation between green roof and PV power generation. When the temperature and power generation of the modules installed in the green roof and non-green roof of the public building were measured for 3 days, the average temperature of the green roof was 23.6 degrees, and it was 36.1 degrees in the non-green roof which increased by nearly 53%. Overall, the module temperature in the green roof was lower. On the other hand, in relation to the PV generation depending on temperature reduction during the same period, the mono-crystalline module and the poly-crystalline module in the green roof showed an increase in generation at nearly 222.2W and 341.6W, and the efficiency rose by 5.5% and 6.2%, respectively, compared to the modules in the non-green roof. Therefore, it is analyzed that green roof has a positive influence on PV power generation. Finally shows the efficiency of the installed on the Green Roof PV system (complex Installation) higher than on the concrete roof PV system. Thus, the complex PV systems as well as the usual benefits of green roofs will provide greater synergies.

Analysis on Generation Power according to Connection Structure for PV Panel under Shadow Condition (그림자 조건에서 태양광 패널의 접속구조에 따른 발전량 분석)

  • Jeong, Woo-Yong;Kim, Yong-Jung;Kim, Hyosung
    • The Transactions of the Korean Institute of Power Electronics
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    • v.25 no.2
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    • pp.94-102
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    • 2020
  • Considering that the output voltage and current of a single PV panel are limited in PV power generation, a PV array should be constructed by connecting several PV panels in series and parallel to meet the required voltage/power levels for power generation capacity. When a PV array is partially shaded, the maximum power generation depends on the configuration of a PV array and the presence or absence of blocking diodes. This study considers six PV array configurations and the presence or absence of blocking diodes. An optimum connection structure was proposed to maximize power generation in a partial shadow condition. Results were verified through simulation and an experiment.

Economic Analysis on VLS-PV System from Sunbelt Region (Sunbelt 지역의 태양광발전 경제성분석)

  • Choi, Bong-Ha;Park, Soo-Uk;Lee, Deok-Ki;Kim, Seok-Ki;Song, Jin-Soo
    • New & Renewable Energy
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    • v.2 no.4 s.8
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    • pp.86-92
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    • 2006
  • This paper analyses the economics of 50kW PV system installed in Tibet and using domestic technology. We show that this system can be expanded to very large-scale photovoltaic power generation [VLS-PV] system successfully. Based on this result, we conduct the economic analysis of 100MW VLS-PV system designed assuming that it will be installed from 2008 to 2017 in Tibet. In this analysis, future price of PV module and system are estimated based on the methodology of experience curve. In 50kW PV system, the generation cost is calculated at 567.2 won/kWh and this is lower than the one of domestic PV system. In future 100MW VLS-PV system. the generation cost is calculated at 305.4 won/kWh by declining system price. If the lifetime and efficiency of the system goes up, due to future technological improvements, the generation cost can be lowered. Moreover, under the environmental and political effect, VLS-PV system can be as competitive as the conventional energy within 20 years.

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Simulation Method of Photovoltaic Generation Systems using EMTP Type Simulators (EMTP형 시뮬레이터를 이용한 태양광발전시스템 모의 방법)

  • Park Minwon;Yu In-Keun
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.54 no.6
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    • pp.303-308
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    • 2005
  • As the cost of photovoltaic(PV) generation systems continues to decrease, utility interactive systems are becoming more economically viable. Furthermore, increases in consumer awareness correspond to a willingness to pay a premium price for clean electrical energy generated using renewable energy resources. Especially, PV generation systems, in particular, is undergoing a rapid expansion-showing an industrial growth of approximately 40$\%$ per year in the worldwide, as PV cell and systems technology improve new markets become increasingly accessible. This has resulted in an increased demand for the simulation scheme and operational technologies of utility interactive PV devices and systems. The simulation schemes that can be applied to the utility interactive PV generation systems readily and cheaply under various conditions considering the sort of solar cell, the capacity of systems and the converter system as well are strongly expected and emphasized among researchers. So far, authors have been introducing the simulation method of PV generation systems with several papers. In this paper, authors introduce the simulation way of PV generation systems using EMTP type simulators; EMTP/ATP, EMTDC/PSCAD, RTDS, with each examples. And, by connecting the voltage amplifier to the RTDS a novel simulation method which is extremely close to the real condition of PV generation system is also introduced.

Novel Concept of Shunt Active Filter Function Added in PV Generation System (엑티브필터 기능을 추가한 새로운 태양광 발전시스템의 제안)

  • Kim, Bong-Tae;Park, Min-Won;Seong, Ki-Chul;Yu, In-Keun
    • Proceedings of the KIEE Conference
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    • 2001.10a
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    • pp.296-300
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    • 2001
  • Novel concept of shunt active filter (AF) function added in Photovoltaic (PV) generation system is described in this paper. So far, for the PV generation system has been treated as one of harmonic sources to the power distribution systems, not only a PV system combined with AF but also AF systems using PV module as their power source have never been discussed. The basic structure and control strategy of the PV-AF system are, for the first time, introduced in this work. In order to stabilize the output current of voltage source inverter (VSI), the reference voltage MPPT control is applied. Simulation analysis shows that it is possible to combine AF function to the three-phase grid-connected PV generation system without any physical difficulties, and the performance of the proposed PV-AF system is acceptable and stable as well.

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Dvelopment of Simulation Method for Partial Shadow of PV Array using EMTDC/PSCAD (EMTDC/PSCAD를 이용한 PV Array의 부분음영 시뮬레이션 기법 개발)

  • Park, Hae-Yong;Park, Young-Gil;Park, Min-Won;Yu, In-Keun
    • Proceedings of the KIEE Conference
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    • 2005.10c
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    • pp.308-310
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    • 2005
  • In recent years, the research and development for the photovoltaic(PV) energy system are making rapidly progress around the world and specially this country, too due the deregulation law for the renewable energy system seems to be born sooner or later. In PV generation system, the partially shaded PV array is the one of the worst case which reduces the efficiency of the total PV generation system. The partial shaded condition is the result of shadowing by cloud and dust building of on the surface of the panel. Some structural elements, such as antennas, booms etc. is also the reason of the shadowing. Even if only a small part of PV is shaded, the overall generation power of PV is significantly decreased. Therefore, several researchers who are focusing on the PV generation system take a time for the research related with the shadowing problem of PV array. In this paper, authors have developed the method which users can achieved the modeling of partially shaded PV array with. With several papers authors have already announced the availability of the EMTDC/PSCAD PV panel model component. This research result is the developed version of the previous papers.

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Development of ESS Scheduling Algorithm to Maximize the Potential Profitability of PV Generation Supplier in South Korea

  • Kong, Junhyuk;Jufri, Fauzan Hanif;Kang, Byung O;Jung, Jaesung
    • Journal of Electrical Engineering and Technology
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    • v.13 no.6
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    • pp.2227-2235
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    • 2018
  • Under the current policies and compensation rules in South Korea, Photovoltaic (PV) generation supplier can maximize the profit by combining PV generation with Energy Storage System (ESS). However, the existing operational strategy of ESS is not able to maximize the profit due to the limitation of ESS capacity. In this paper, new ESS scheduling algorithm is introduced by utilizing the System Marginal Price (SMP) and PV generation forecasting to maximize the profits of PV generation supplier. The proposed algorithm determines the charging time of ESS by ranking the charging schedule from low to high SMP when PV generation is more than enough to charge ESS. The discharging time of ESS is determined by ranking the discharging schedule from high to low SMP when ESS energy is not enough to maintain the discharging. To compensate forecasting error, the algorithm is updated every hour to apply the up-to-date information. The simulation is performed to verify the effectiveness of the proposed algorithm by using actual PV generation and ESS information.