JP2000217259A - Solar light power generating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar light power generation system which can discover abnormality quickly by monitoring the condition of a solar cell circuit, at proper place. SOLUTION: A solar light generation system is composed of solar cell circuits SC1, SC2,..., SCn which consist of a plurality of solar cell modules 2 connected in series, and placed, for example, on the roof of a housing, an inverter which converts a DC power generated with the solar cell modules 2, and a power conditioner 3 which connects an AC power converted in the inverter with a commercial power and switches each power as occasion demands and supplies surplus power to the commercial power. The power conditioner 3 is provided with an output part 4, which outputs a signal for indicating the output current of the solar cell circuit SC, and the signal outputted from the output part 4 is monitored with a monitor 5 installed at a remote place.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photovoltaic power generation system.

[0002]

2. Description of the Related Art Conventionally, a photovoltaic power generation system is shown in FIGS.
It was as shown in That is, the solar power generation system 31 includes, for example, a plurality of serially connected solar cell modules 32 mounted on a roof of a house, a DC breaker 33, a surge absorber 34, a diode 35, and a DC ammeter 36. Solar cell circuits SC1 ', SC2', ...
., A connection box 37 for connecting SCn ′, an inverter (not shown) for converting DC power generated by the solar cell module 32 into AC power, and connecting AC power and commercial power converted by the inverter. The power conditioner 38 switches between the respective electric powers as needed and supplies the surplus electric power to the commercial electric power. In this solar power generation system, solar cell circuits SC1 ', SC
In order to know the abnormality of 2 ′,..., SCn ′, the indication value of the DC ammeter 36 provided in each solar cell circuit SC1 ′, SC2 ′,. If the same value is shown, the circuit is determined to be normal, and if a certain circuit shows a different value compared to other circuits, it is determined to be abnormal.

[0003]

However, according to the above conventional solar power generation system, it is difficult to measure the output current because the place where the connection box 37 is attached is outdoors or in the attic. However, there is a drawback that it takes much time and effort.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the conventional photovoltaic power generation system, an object of the present invention is to provide a photovoltaic power generation system capable of quickly detecting an abnormality by monitoring the state of a solar cell circuit at an appropriate place. A solar cell circuit comprising at least a plurality of solar cell modules, an inverter that converts DC power generated by the solar cell module into AC power, and AC power that is converted by the inverter. And a power conditioner for connecting power and switching each power as needed, or supplying surplus power to commercial power. An output unit for outputting a signal for displaying the output current and the amount of power generation is provided, and the output signal output from the output unit is separated. Is that which enables monitoring provided by the monitoring device to place.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The output current and power generation of a solar cell circuit output from an output section of a power conditioner can be monitored by a monitor device installed at a remote place, and the abnormality of the solar cell circuit can be monitored. Can be discovered quickly.

[0006]

1 and 2 show an embodiment of a solar cell abnormality alarm device according to the present invention. Hereinafter, the present invention will be described with reference to the drawings.

The photovoltaic power generation system 1 includes, for example, photovoltaic circuits SC1, SC2,..., SC comprising a plurality of photovoltaic modules 2 connected in series mounted on the roof of a house.
n and an inverter (not shown) for converting the DC power generated by the solar cell module 2 into AC power, and the AC power and commercial power converted by the inverter are connected to each other as necessary. And a power conditioner 3 for supplying surplus power to commercial power. The power conditioner 3 is provided with an output unit 4 for outputting a signal for displaying the output current of the solar cell circuit, and monitors a signal output from the output unit 4 with a monitor device 5 installed at a remote place.

The solar cell circuits SC1, SC2,..., SCn output from the output unit 4 of the power conditioner 3.
The output current and the amount of power generation can be monitored by the monitoring device 5 installed in a remote place, and an abnormality in the solar cell circuit can be quickly detected.

[0009]

As described above, the photovoltaic power generation system according to the present invention converts a DC power generated by the solar cell module into an AC power by using a solar cell circuit including at least a plurality of solar cell modules. An inverter,
In a photovoltaic power generation system configured with a power conditioner that connects AC power and commercial power converted by the inverter and switches each power as necessary, or supplies surplus power to commercial power. An output unit for outputting a signal for displaying an output current or a power generation amount of the solar cell circuit in the power conditioner, and an output signal output from the output unit is monitored by a monitor device installed in a remote place. By making it possible, abnormalities can be discovered quickly by monitoring the state of the solar cell circuit at an appropriate location, thereby speeding up the recovery of the photovoltaic power generation system and minimizing the economic loss due to reduced power generation. There is an effect that can be. In addition, since the solar cell circuit can be directly connected, there is an effect that a connection box is not required and the manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of one embodiment of a photovoltaic power generation system according to the present invention.

FIG. 2 is an explanatory diagram of a display device of the solar power generation system according to the present invention.

FIG. 3 is an explanatory diagram of one embodiment of a conventional solar power generation system.

FIG. 4 is a clear view of a connection box of a conventional solar power generation system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Solar power generation system 2 Solar cell module 3 Power conditioner 4 Output part 5 Monitor device

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[Procedure amendment]

[Submission date] January 26, 1999 (1999.1.2
6)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0002

[Correction method] Change

[Correction contents]

[0002]

2. Description of the Related Art Conventionally, a photovoltaic power generation system is shown in FIGS.
It was as shown in That is, the solar power generation system 31 includes, for example, a plurality of serially connected solar cell modules 32 mounted on a roof of a house, a DC breaker 33, a surge absorber 34, a diode 35, and a DC ammeter 36. Solar cell circuits SC1 ', SC2', ...
, SCn ′, and a power conditioner 38 that converts DC power generated by the solar cell module 32 into AC power. In this solar power generation system, solar cell circuits SC1 ', SC
In order to know the abnormality of 2 ′,..., SCn ′, the indication value of the DC ammeter 36 provided in each solar cell circuit SC1 ′, SC2 ′,. If the same value is shown, the circuit is determined to be normal, and if a certain circuit shows a different value compared to other circuits, it is determined to be abnormal.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction contents]

The photovoltaic power generation system 1 includes, for example, photovoltaic circuits SC1, SC2,..., SC comprising a plurality of photovoltaic modules 2 connected in series mounted on the roof of a house.
n, and a power conditioner 3 that converts DC power generated by the solar cell module 2 into AC power. The power conditioner 3 is provided with an output unit 4 for outputting a signal for displaying the output current of the solar cell circuit, and monitors a signal output from the output unit 4 with a monitor device 5 installed at a remote place.

Claims (1)

[Claims] 1. A solar cell circuit comprising at least a plurality of solar cell modules, an inverter for converting DC power generated by the solar cell module into AC power, and AC power and commercial power converted by the inverter. In a photovoltaic power generation system configured with a power conditioner that switches each power as needed or supplies surplus power to commercial power, an output of the solar cell circuit is supplied to the power conditioner. A photovoltaic power generation system, comprising: an output unit for outputting a signal for displaying a current or a power generation amount, and an output signal output from the output unit can be monitored by a monitor device installed at a remote place. .