Electricity: power supply or regulation systems – Input level responsive – Using a linearly acting final control device
Patent
1995-04-28
1997-07-01
Wong, Peter S.
Electricity: power supply or regulation systems
Input level responsive
Using a linearly acting final control device
136293, 323906, G05F 500
Patent
active
056442190
ABSTRACT:
The object of the prevent invention is to provide a solar energy system of simple construction capable of utilizing the photovoltaic source always at a high efficiency without being affected by environmental changes or yearly declination of photovoltaic cell, etc.
A solar energy system S provided, between photovoltaic array P constructed by connecting at least two photovoltaic arrays PL, PR of identical characteristics in parallel and a lead L to which the electric energy of the photovoltaic array P is supplied, with a detecting circuit NC for detecting the operating point of the photovoltaic array P, characterized in that the detecting circuit MC is provided with current limiting elements DL, DR with different voltage drops in forward direction connected in series to each of the two photovoltaic arrays PL, PR and that the system calculates the power of the two photovoltaic arrays PL, PR by detecting the terminal voltages of the two photovoltaic arrays PL, PR by means of those current limiting elements DL, DR and detects the operating point of the photovoltaic array P from the difference of power (or differential current) between the two photovoltaic arrays PL, PR.
REFERENCES:
patent: 4449057 (1984-05-01), Ishiwata
patent: 5327071 (1994-07-01), Frederick et al.
Elektrische Energie-Technik, Jan. 1984, No. 1, pp. 59-60 (w/summary).
Han Y. J.
Kyocera Corporation
Wong Peter S.
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