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Power optimizer

About: Power optimizer is a research topic. Over the lifetime, 10525 publications have been published within this topic receiving 199245 citations.


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Journal ArticleDOI
TL;DR: This study uses measured performance data at the module level for 542 PV systems to estimate lost system performance due to partial shade and it is estimated that on average, 36% of the power lost from partial shading has been recovered through use of module-level dc power electronics.
Abstract: Distributed maximum power point tracking (DMPPT) is a topic of much interest in improving photovoltaic (PV) system performance. This study uses measured performance data at the module level for 542 PV systems to estimate lost system performance due to partial shade. Because each of the monitored systems is equipped with module-level dc power optimizers, an estimate is made of the overall system shading loss and the performance improvement that the system has received from this use of DMPPT. The estimate of shade extent and performance improvement predicted by this approach is verified experimentally against a system that has site survey images, and measured production with and without module-level electronics. Summary data for this analysis across 542 systems find an average power loss of 8.3% due to partial shading, which would have increased to 13% were the systems not equipped with panel-level optimizers. It is estimated that on average, 36% of the power lost from partial shading has been recovered through use of module-level dc power electronics.

73 citations

Proceedings ArticleDOI
22 Oct 2000
TL;DR: A simple maximum power tracking control system with analog circuit and achieve aver 90% output of maximum power in any circumstance is proposed.
Abstract: Existing wind power generating systems are mostly of large capacity (over 500 kW output) and high-priced These systems require a wide area for construction. Therefore, we propose a small-scaled (about 5-10 kW output) generating system. This system has the advantage of system flexibility against the large one. But the small-scale system has a weak point of system efficiency. Then, we have to construct a simple and inexpensive system. Because of the erratic change of wind power, an AC/DC converter-fed system is recommended. Therefore, we adopt a compact permanent magnet type, synchronous generator which doesn't need exciting current, and step up/down buck boost chopper to wind power generating system without position or speed sensor. In addition, we employ an inexpensive rectifier circuit using a diode bridge instead of an AC/DC converter with a PWM method. Using these methods we achieve a simple and inexpensive wind power generating system. Furthermore, we propose a simple maximum power tracking control system with analog circuit and achieve aver 90% output of maximum power in any circumstance.

73 citations

01 Dec 2012
TL;DR: In this paper, a simulation study of maximum power point tracking (MPPT) for photovoltaic systems using perturb and observe algorithm was performed using Matlab/Simulink.
Abstract: This paper is a simulation study of maximum power point tracking (MPPT) for photovoltaic systems using perturb and observe algorithm. Maximum power point tracking (MPPT) plays an important role in photovoltaic systems because it maximize the power output from a PV system for a given set of conditions, and therefore maximize the array efficiency and minimize the overall system cost. Since the maximum power point (MPP) varies, based on the irradiation and cell temperature, appropriate algorithems must be utilized to track the (MPP) and maintain the operation of the system in it. Matlab/Simulink is used to establish a model of photovoltaic system with (MPPT) function. This system is developed by combining the models established of solar PV module and DC-DC Boost converter. The system is simulated under different climate conditions. Simulation results show that the photovoltaic simulation system can track the maximum power point accurately. A particular typical 50W solar panel was used for model evaluation, and results of simulation were compared with points taken directly from the data sheet and curves published by the manufacturers.

72 citations

Patent
03 Oct 2006
TL;DR: In this article, a maximum power point tracking method, applied to a tracking device, employs a DC/DC converter connecting with a solar cell array, and including a controller actuating the DC and DC converter to perform an active resistance characteristic.
Abstract: A maximum power point tracking method, applied to a tracking device, employs a DC/DC converter connecting with a solar cell array, and including a controller actuating the DC/DC converter to perform an active resistance characteristic; a maximum power point tracking circuit adjusting the active resistance of the DC/DC converter; monitoring a change of an output power of the solar cell array in determining a direction for adjusting the active resistance of the DC/DC converter; and the maximum power point tracking circuit repeatedly adjusting the active resistance of the DC/DC converter. If the change of the output power of the solar cell array is positive, the active resistance of the DC/DC converter is adjusted in the same direction; but, conversely, if the change of the output power of the solar cell array is negative, the active resistance of the DC/DC converter is adjusted in an opposite direction.

72 citations

Journal ArticleDOI
TL;DR: In this article, the authors proposed a methodology for designing the control strategy of different power converters connected to a dc bus without a centralized system management control unit, in order to achieve voltage regulation, continuity of service, and smart use of storage devices.
Abstract: The advantages arising from dc distribution networks are related to the possibilities of achieving higher quality supply and easier reconfigurability of the system. This paper presents the concept of introducing some dc islands interconnected with the ac distribution network. This will make it easier to connect storage systems, electrical drives, power converters, and renewable sources (i.e., photovoltaic panels). In order to realize the aforementioned goals, a methodology for designing the control strategy of different power converters connected to a dc bus without a centralized system management control unit is proposed. In this way, a plug-and-play functionality for connecting new power converter interfaced elements in the dc network able to stabilize the voltage under different working conditions is realized. In order to prove the advantages obtainable with such a network, a 100-kW dc test facility has been realized at the laboratories of RSE. Different working conditions were tested by means both of numerical and experimental results, proving the effectiveness of the proposed strategy for voltage regulation, continuity of service, and the smart use of storage devices.

72 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202363
2022144
202112
202017
201924
201850