scholarly journals Power Bus Management Techniques for Space Missions in Low Earth Orbit

Energies ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7932
Author(s):  
Luigi Schirone ◽  
Matteo Ferrara ◽  
Pierpaolo Granello ◽  
Claudio Paris ◽  
Filippo Pellitteri
Keyword(s):  
Input Pulse ◽  
Low Earth Orbit ◽  
Maximum Power ◽  
Solar Array ◽  
Earth Orbit ◽  
Space Vehicles ◽  
Power Bus ◽  
Point Tracking ◽  
Simulink Model ◽  
Power Point

In space vehicles, the typical configurations for the Solar Array Power Regulators in charge of managing power transfer from the solar array to the power bus are quite different from the corresponding devices in use for terrestrial applications. A thorough analysis is reported for the most popular approaches, namely Sequential Switching Shunt Regulation and parallel-input Pulse Width Modulated converters with Maximum Power Point Tracking. Their performance is compared with reference to a typical mission in low Earth orbit, highlighting the respective strengths and weaknesses. A novel solar array managing technique, the Sequential Maximum Power Tracking, is also introduced in the trade-off and was demonstrated able to boost energy harvesting, especially in the presence of mismatching in the solar array. It also can achieve top levels of reliability using a rather simple control hardware. Its operation was verified both by a Matlab–Simulink model and by an experimental breadboard.

scholarly journals Die ontwikkeling en implementering van ’n saamgestelde omsetter vir gebruik in sonenergiestelsels

1992 ◽  
Vol 11 (4) ◽  
pp. 142-146
Author(s):  
S. J. B. Hartman
Keyword(s):  
Maximum Power Point Tracking ◽  
Cost Effective ◽  
Maximum Power ◽  
Solar Array ◽  
Photovoltaic Converter ◽  
Maximum Power Point ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Battery Bank ◽  
Power Point

The converter proposed here is a compound photovoltaic converter system that has been implemented with a power rating of 1,5 kVA at an array voltage of 96 V, using a 24 V battery bank. The converter system combines the functions of inversion, battery regulation and maximum power point tracking of the solar array into a single cost-effective converter. Maximum power point tracking is performed by controlling the voltage and frequency of the AC output. A description of this converter, and an explanation of the control strategy employed, are provided together with practical results measured on the prototype converter. This compound topology has a high conversion efficiency from solar array to load.

scholarly journals Maximum Power Point Tracking in the Photovoltaic Module Using Incremental Conductance Algorithm with Variable Step Length

2021 ◽  
Vol 54 (3) ◽  
pp. 395-402
Author(s):  
Giulio Lorenzini ◽  
Mehrdad Ahmadi Kamarposhti ◽  
Ahmed Amin Ahmed Solyman
Keyword(s):  
Step Length ◽  
Maximum Power ◽  
Maximum Efficiency ◽  
Solar Array ◽  
Photovoltaic Module ◽  
Point Tracking ◽  
Incremental Conductance ◽  
Conductance Method ◽  
Power Point ◽  
Speed And Accuracy

Tracking maximum power in photovoltaic applications is considered a major issue. Because of the change in the output power of solar cells by changing the radiation and temperature, it is required to receive the maximum power from solar array to be achieved the maximum efficiency using maximum power tracking methods. A large number of the maximum power methods have been introduced so far, but each has difficulty in terms of tracking speed and accuracy, and in practice, they have not been able to improve both of these factors. Among the commonly used methods, the incremental conductance method has a good tracking speed and accuracy, but at the same time, it cannot reach both to a desirable value. In this paper, a new method is proposed based on the above method that improves the mentioned factors simultaneously to an acceptable limit. The result of the simulation confirms the correctness of the claim of the proposed method.

scholarly journals Evaluation of maximum power point tracking methods for photovoltaic systems

2011 ◽  
Vol 21 (2) ◽  
pp. 151-165 ◽  
Author(s):  
Abdelaziz Talha ◽  
Houria Boumaaraf ◽  
Omar Bouhali
Keyword(s):  
Peak Power ◽  
Maximum Power Point Tracking ◽  
Maximum Power ◽  
Hill Climbing ◽  
Solar Array ◽  
Photovoltaic Systems ◽  
Maximum Power Point ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Power Point

Evaluation of maximum power point tracking methods for photovoltaic systems The output characteristics of photovoltaic (PV) arrays are nonlinear and change with the solar irradiance and the cell's temperature. Therefore, a maximum power point tracking (MPPT) technique is needed to draw peak power from the solar array to maximize the produced energy. Among the hill climbing methods, the perturb and observe (P&O) method tracks the maximum power point (MPP) by repeatedly increasing or decreasing the output voltage at the MPP of the PV module. The implementation of the method is relatively simple, but it cannot track the MPP when the irradiance varies quickly with time. In addition, itmay cause system oscillation around the peak power points due to the effect of measurement noise. The incremental conductance (IncCond) method is also often used in PV systems. This method tracks the MPPs by comparing the incremental and instantaneous conductances of the solar array. This method requires longer conversion time, and a large amount of power loss results. In addition, extra hardware circuitry is required to implement the system. In this paper, it is shown that the negative effects associated with such a drawback can be greatly reduced if the intelligent method is used to improve P&O and IncCond algorithms. The perturbation step is continuously approximated by using fuzzy logic controller (FLC). By the digital simulation, the validity of the proposed control algorithm is proved.

Grid Tied Photovoltaic System with Perturb and Observe Maximum Power Point Controller and LCL Filter

2018 ◽  
Vol 7 (3.6) ◽  
pp. 68
Author(s):  
Ramana Pilla ◽  
Jallu Hareesh Kumar ◽  
Adavipalli Chandana
Keyword(s):  
Boost Converter ◽  
Maximum Power ◽  
Photovoltaic System ◽  
Solar Array ◽  
Pv System ◽  
Maximum Power Point ◽  
Lcl Filter ◽  
Point Tracking ◽  
Perturb And Observe ◽  
Power Point

This paper describes a grid tied photovoltaic (PV) system along with maximum power point tracking (MPPT) and LCL filter. A PV model is developed using mathematical equations of solar cell. This PV module is controlled and optimized with MPPT algorithm. The maximum power point (MPP) tracking is implemented using Perturb and Observe (P&O) algorithm from the solar array and given to DC-DC boost converter. The enhancement of unfettered PV Voltage is achieved using boost converter and also used to verify the               precision of MPPT technique. Using inverter controller, the boost converter DC output voltage is converted into AC voltage. The phase and frequency of the grid is tracked using phase locked loop (PLL) to integrate the inverter with the grid. In addition to this, to diminish the harmonics in the inverter output an LCL filter is used. The performance of grid tied photovoltaic system is extensively simulated with MATLAB software.   

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