• Proceedings of the KIEE Conference
• /
• 2008.04a
• /
• pp.215-216
• /
• 2008

This paper is proposed a approximation control method(ACM) for the maximum power of a photovoltaic system. It is designed for power systems application and utilities. The proposed Maximum Power Point Tracking(MPPT) control has the advantage to provide a new simple way to approximate the optimal or rated voltage, the optimal or rated current and maximum power rating produced by a solar panel and the photovoltaic inverter. And this straightforward method has the advantage that Pmax and $V_{op}$ can be approximated using the same variable as the dynamic model without using complicate approximations or Taylor series. This paper is proposed MPPT using AMC using weather condition of domestic moderate program technique. This paper is proposed the experimental results to verify the effectiveness of the new methods.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2014.10a
• /
• pp.561-564
• /
• 2014

In this paper a photovoltaic energy harvesting charger with battery management circuit is proposed. The proposed circuit harvests maximum power from a solar cell by employing MPPT(Maximum Power Point Tracking) control and charges an external capacitor battery with the harvested energy. The charging state of the battery is controlled according to the signals from the battery management circuit. The proposed circuit is designed in a 0.35um CMOS process technology and its functionality has been verified through extensive simulations. The maximum efficiency of the designed entire system is 84.8%, and the chip area including pads is $1350um{\times}1200um$.

• 한국태양에너지학회:학술대회논문집
• /
• 2012.03a
• /
• pp.427-432
• /
• 2012

This paper proposes efficient operation method of PV system consisted of multi-central which is suitable for large scale system. The multi-central system used switch at a DC-link and applied proposed algorithm can improve the efficiency and the reliability on the existing system. This algorithm, with advantage of Multi-Central system can minimize the effect of different characteristic of each PV array due to a shadow or damaged PV cell. Each system is analysed and maximum power point tracking control, DC-link voltage control and output current control is used commonly. The validity is verified after comparing of the existing system and proposed system by simulation.

• ETRI Journal
• /
• v.43 no.3
• /
• pp.459-470
• /
• 2021

This paper presents a low-cost prototype for monitoring online the maximum power produced by a domestic photovoltaic (PV) system using Internet of Things (IoT) technology. The most common tracking algorithms (P&O, InCond, HC, VSS InCond, and FL) were first simulated using MATLAB/Simulink and then implemented in a low-cost microcontroller (Arduino). The current, voltage, load current, load voltage, power at the maximum power point, duty cycle, module temperature, and in-plane solar irradiance are monitored. Using IoT technology, users can check in real time the change in power produced by their installation anywhere and anytime without additional effort or cost. The designed prototype is suitable for domestic PV applications, particularly at remote sites. It can also help users check online whether any abnormality has happened in their system based simply on the variation in the produced maximum power. Experimental results show that the system performs well. Moreover, the prototype is easy to implement, low in cost, saves time, and minimizes human effort. The developed monitoring system could be extended by integrating fault detection and diagnosis algorithms.

• Journal of Power Electronics
• /
• v.17 no.2
• /
• pp.476-489
• /
• 2017

Under partial shading conditions (PSCs), multiple maximums may be exhibited on the P-U curve of string inverter photovoltaic (PV) systems. Under such conditions, heuristic methods are invalid for extracting a global maximum power point (GMPP); intelligent algorithms are time-consuming; and model-based methods are complex and costly. To overcome these shortcomings, a novel hybrid MPPT (MPF-IP&O) based on a model-based peak forecasting (MPF) method and an improved perturbation and observation (IP&O) method is proposed. The MPF considers the influence of temperature and does not require solar radiation measurements. In addition, it can forecast all of the peak values of the PV string without complex computation under PSCs, and it can determine the candidate GMPP after a comparison. Hence, the MPF narrows the searching range tremendously and accelerates the convergence to the GMPP. Additionally, the IP&O with a successive approximation strategy searches for the real GMPP in the neighborhood of the candidate one, which can significantly enhance the tracking efficiency. Finally, simulation and experiment results show that the proposed method has a higher tracking speed and accuracy than the perturbation and observation (P&O) and particle swarm optimization (PSO) methods under PSCs.

• Proceedings of the KIPE Conference
• /
• 2016.07a
• /
• pp.469-470
• /
• 2016

Since efficiency of maximum power point tracking (MPPT) is important for photovoltaic systems, a number of MPPT algorithms have already been researched for other environment, however, the most of MPPT algorithms can't track maximum point in dynamic irradiation. In this paper, P&O and 3-Point MPPT which is more specialized in dynamic irradiation are compared in basis of European Efficiency Test(EN50530). The efficiency of 3-Point MPPT algorithm is proved by simulation and experiment. In result, 3-Point MPPT shows higher efficiency in dynamic irradiation and less affected by environment than P&O.

• Proceedings of the KIEE Conference
• /
• 2011.07a
• /
• pp.32-34
• /
• 2011

본 논문은 최대전력추종 태양광 충전법을 적용한 LED 동기점멸등 제어시스템 설계 및 구현을 목표로 한다. 즉, 선박의 야간 안전항해를 돕기 위한 항로표지인 등부표에 장착되는 LED 동기점멸등의 구동제어 시스템, 최대전력추종 방식의 전류제어 벅 컨버터를 적용한 배터리 충전시스템의 설계 및 구현, 그리고 그 특성파악에 대해 중점적으로 다룬다. 시스템에 적용한 태양광 모듈의 모델링 및 MATLAB 시뮬레이션을 통해 추출한 태양전지 파라미터를 충전회로 시스템에 적용하여 최대전력추종 태양광 충전시스템을 설계하였다. 따라서, 본 논문에서는 원칩 마이크로컨트롤러를 사용하여 최대전력추종(MPPT) 태양광 충전제어시스템과 GPS활용 LED 동기점멸등 구동제어시스템을 구현하여, 그 특성파악을 통한 실시스템 적용가능성을 확인하였다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2011.05a
• /
• pp.577-578
• /
• 2011

본 연구는 태양광 시스템의 활용에 있어서 태양전지를 활용한 시스템의 구성은 태양에너지를 흡수하기 위하여 계절별 및 실시간으로 태양의 움직임을 추적 해 주는 시스템을 필요로 하며, 태양의 움직임에 따라 태양전지(태양열 판넬)의 방향을 안정적으로 제어하여 가장 효율이 높은 상태인 태양광과 수직으로 유지해 주는 시스템이 필요로 하고 있다. 본 논문은 계절 별 및 하루의 태양의 경로를 추적하여 태양광을 항상 수직으로 받을 수 있도록 집광판(광전변환:PV(Photovoltic))의 방향을 태양의 위치 좌표에 따라 정확한 위치로 제어하는 Fuzzy 알고리즘 기반의 2축 제어시스템을 설계하고자 한다.

• Proceedings of the KIEE Conference
• /
• 2004.04a
• /
• pp.212-214
• /
• 2004

As the maximum power operating point(MPOP) of photovoltaic(PV) power generation systems changes with changing atmospheric conditions such as solar radiation and temperature, an important consideration in the design of efficient PV system is to track the MPOP correctly. Many maximum power point tracking(MPPT) techniques have been considered in the past, however, techniques using microprocessors with appropriate MPPT algorithms are favored because of their flexibility and compatibility with different PV arrays. Although the efficiency of these MPPT algorithms is usually high, it drops noticeably in case of rapidly changing atmospheric conditions. This paper analysed and researched the characteristics of three MPPT algorithms; P&O, Inc&Cond, ImP&O and simulated them with irradiance changing.

• Proceedings of the KIEE Conference
• /
• 2008.10c
• /
• pp.180-181
• /
• 2008

태양광발전 추적시스템은 태양이 항상 법선을 이루면서 태양전지 모듈에 입사되게 하는 방법으로 태양광발전시스템의 발전 효율을 향상하기 위해서는 정확하게 태양을 추적하기 위한 시스템이 필요하다. 본 논문에서는 One-sensor방식을 채택하여 기능성을 그대로 유지하고, Sensor의 수를 감소시켜 비용을 절감하였다.