Patent
Solar cell power source device
Hyun-min Jo,Yong-Ho Kim +1 more
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TLDR
In this paper, a solar cell power source device is presented which optimizes the power output of the solar cell by detecting a maximum power point and controlling the duty cycle of a switching transistor in a switching power converter.Abstract:
A solar cell power source device is disclosed which optimizes the power output of the solar cell by detecting a maximum power point of the solar cell and controlling the duty cycle of a switching transistor in a switching power converter such that the output current of the solar cell follows the maximum power point. Also shown is a pulse width modulation controller which multiplies the output voltage of the solar cell by the output current of the solar cell to obtain a power detecting signal, samples the power detecting signal during two different sample periods to determine if the power output is decreasing, and modulating the pulses output to the switching transistor of the switching power converter in order to maintain the power output of the solar cell at the maximum power point.read more
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Patent
Distributed Power Harvesting Systems Using DC Power Sources
TL;DR: In this article, the converters are coupled in series and an inverter is connected in parallel with the series connection of converters and inverts a DC input to the inverter from converters into an AC output.
Patent
Monitoring of Distributed Power Harvesting Systems Using DC Power Sources
TL;DR: A monitoring system and method for monitoring performance of individual powers sources in a distributed power source system is presented in this paper, where a monitoring module is coupled to each of the power sources or to each string of serially connected power sources to monitor and collect data regarding current, voltage, temperature and other environmental factors at the power source.
Patent
Method for distributed power harvesting using DC power sources
TL;DR: In this article, the converters are coupled in series and an inverter is connected in parallel with the series connection of converters and inverts a DC input to the inverter from converters into an AC output.
Patent
Maximum power point tracking method and device
Kasai Yuji,Fumihisa Kano +1 more
TL;DR: In this paper, the output current value of a direct-current power source obtained by low-frequency, minute modulation of the input voltage of a switching converter is detected in a circuit having an amplification factor switching function that switches the amplification factor between definite magnitudes synchronizing with the modulation.
Patent
Device for distributed maximum power tracking for solar arrays
TL;DR: In this article, the authors proposed a system for providing power from solar cells whereby each cell or cell array is allowed to produce its maximum available power and converted by an operatively connected DC/DC converter.
References
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Patent
Apparatus and method for maximizing power delivered by a photovoltaic array
Eduard Muljadi,Roger W. Taylor +1 more
TL;DR: In this paper, a method and apparatus for maximizing the electric power output of a photovoltaic array connected to a battery is presented, where the voltage across the PV array is adjusted through a range of voltages to find the voltage that maximizes the electrical power generated by the PV arrays and then is held constant for a period of time.
Patent
DC/AC inverter controller for solar cell, including maximum power point tracking function
TL;DR: In this article, a DC/AC inverter controlling system consisting of an inverter unit for inverting DC (direct current) power derived from the solar cell power source into AC (alternating current) energy to be supplied to an AC power line, and a power variation judging unit for judging whether or not a variation measured during a predetermined time period and occurring in the AC power outputted from the DC or AC inverter units, exceeds a predetermined value, thereby producing a power variance judging signal, while the power variation does not exceed the predetermined value.
Patent
Maximum power tracker
TL;DR: In this paper, a buck regulator or impedance converter is described for operating a current limited power supply such as a photovoltaic array at or near its maximum power point, which is achieved at the compliance voltage which is an almost constant voltage, and means for sensing the voltage at the input of the regulator and using this sensed voltage to control a logic circuit which, in turn, controls the duty cycle of a switching transistor.
Patent
Coupling network for improving conversion efficiency of photovoltaic power source
TL;DR: In this article, a switching network for improving the conversion efficiency of a photovoltaic power supply comprises a variable coupling circuit for coupling an array of PV cells to a load resistance.
Patent
Method of and system for controlling a photovoltaic power system
TL;DR: In this paper, the voltage of the solar battery is kept at a voltage reference which is determined in accordance with the operating condition of the system thereby to maximize the power of the battery.