Maximum Power Point Tracking for Hybrid Wind-Solar Energy System Using Optimum Controllers Techniques

2018 ◽  
Author(s):  
Ola Abdelnasser Mosaad Ali ◽  
Helmy Mohamed El-Zoghby ◽  
Abdel Ghany Mohamed Abdel Ghany
Keyword(s):  
Solar Energy ◽  
Maximum Power Point Tracking ◽  
Energy System ◽  
Maximum Power ◽  
Maximum Power Point ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Power Point

Maximum Power Point Tracking (MPPT) for a Solar Photovoltaic System: A Review

2015 ◽  
Vol 787 ◽  
pp. 227-232 ◽  
Author(s):  
L.A. Arun Shravan ◽  
D. Ebenezer
Keyword(s):  
Solar Energy ◽  
Maximum Power Point Tracking ◽  
Maximum Power ◽  
Nonlinear Behaviour ◽  
Pv System ◽  
Maximum Power Point ◽  
Pv Systems ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Power Point

In recent years there has been a growing attention towards use of solar energy. Advantages of photovoltaic (PV) systems employed for harnessing solar energy are reduction of greenhouse gas emission, low maintenance costs, fewer limitations with regard to site of installation and absence of mechanical noise arising from moving parts. However, PV systems suffer from relatively low conversion efficiency. Therefore, maximum power point tracking (MPPT) for the solar array is essential in a PV system. The nonlinear behaviour of PV systems as well as variations of the maximum power point with solar irradiance level and temperature complicates the tracking of the maximum power point. This paper reviews various MPPT methods based on three categories: offline, online and hybrid methods. Design of a PV system in a encoding environment has also been reviewed here. Furthermore, different MPPT methods are discussed in terms of the dynamic response of the PV system to variations in temperature and irradiance, attainable efficiency, and implementation considerations.

A Highly Efficient and Adaptable Solar-Energy Harvesting Circuit for Batteryless IoT Devices

2018 ◽  
Author(s):  
Ching-Cheng Yang ◽  
Paul C.-P. Chao ◽  
Rajeev Kumar Pandey
Keyword(s):  
Energy Harvesting ◽  
Solar Energy ◽  
Maximum Power Point Tracking ◽  
Maximum Power ◽  
Transfer Efficiency ◽  
Maximum Power Point ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Solar Energy Harvesting ◽  
Power Point

In this paper a new on-chip 2nd generation solar energy harvesting DC-DC converter has been proposed for a battery-less Internet of Things (IoTs) Devices. The propose circuit is design to maximize the transfer efficiency and stability as well as enough high power supply to the back-end loads. Altogether the proposed circuit consists of a cross-coupled charge pump, a maximum power point tracking (MPPT) circuit, a timing control circuit and regulator. The range of input voltage is from 0.5V to 3V. Required boosted output voltage is in the range of 1V to 3.3V. The maximum transfer efficiency is more than 60% and the maximum throughout power is 200μW. A gated clock frequency modulation circuit has been designed and employed in the maximum power point tracking (MPPT) unit to lock the input resistance of the charge pump. In addition, to provide a stable voltage to the load a low dropout (LDO) regulator circuit is used. The experimental results show that the maximum power conversion efficiency (PCE) is 78% at 52μW input power condition.

scholarly journals A Novel Maximum Power Point Tracking Strategy Based on Enhanced Real-Time Adaptive Step-Size Modified Control for Photovoltaic Systems

2021 ◽  
Vol 9 ◽  
Author(s):  
Junfeng Zhou ◽  
Yubo Zhang ◽  
Shuxiao Zhang ◽  
Yuanjun Guo ◽  
Zhile Yang ◽  
...  
Keyword(s):  
Solar Energy ◽  
Real Time ◽  
Output Voltage ◽  
Maximum Power Point Tracking ◽  
External Environment ◽  
Maximum Power ◽  
Maximum Power Point ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Power Point

With the development of society, the demand for energy keeps increasing. Solar energy has received widespread concern for its renewable and environmentally friendly advantages. As one of the most efficient solar energy devices, the output power of photovoltaic (PV) cells is easily affected by the external environment. In order to solve the problem of the maximum power output of PV cells, this paper proposed a maximum power point tracking (MPPT) method. Based on the online particle swarm optimization (PSO) variable step length algorithm, the pulse width modulation (PWM) control module parameters are set according to the parameters of the PV cells’ output voltage. By dynamically adjusting the output voltage step of the PV cells online, the output of the PV cells is stabilized near the maximum power point (MPP). The simulation results concluded that the method and model could accurately adjust the output voltage according to the external environment changes in real time and reduce the voltage fluctuation at the MPP, providing a new idea to solve the problem of MPPT of PV cells.

scholarly journals Power Characteristics Analysis of Maximum Power Point Tracking (MPPT) and Pulse Width Modulation (PWM)

2021 ◽  
Vol 1 (2) ◽  
Author(s):  
Ilham Ramadhana Chofananda ◽  
Jamaaluddin Jamaaluddin ◽  
Arief Wisaksono ◽  
Izza Anshory
Keyword(s):  
Solar Energy ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Maximum Power Point Tracking ◽  
Maximum Power ◽  
Maximum Power Point ◽  
Power Characteristics ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Power Point

Solar energy is a source of energy and has advantages compared to fossil energy. Indeed, further research and development of this type of solar power is needed, including at the University of Muhammadiyah Sidoarjo. The use of solar energy is carried out by installing photovoltaic (PV) cells with a photovoltaic output control system that uses MPPT (Maximum Power Point Tracking) and PWM (Pulse Width Modulation) to regulate the load used and charge the battery. The two PV control methods have different characteristics. These differences will be analyzed based on the characteristics of the load and sunlight contained in the electrical engineering laboratory of the Muhammadiyah University of Sidoarjo. It can be seen from the results of the analysis that at power above 200 W, MPPT has a better voltage stability than PWM.

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