JPH05122760A - Power source monitoring system - Google Patents

Abstract

PURPOSE:To monitor the abnormality of the solar battery panel of a slave station by a master station. CONSTITUTION:A light quantity detecting part 3 detects the light quantity incident on a solar battery panel and when the light quantity is equal to the prescribed value or above, sends a light quantity detecting signal S1. A voltage detecting part 4, when it receives the light quantity detecting signal S1, measures the power generation voltage of respective panels 11-13, and when at least one of the measured voltage becomes the prescribed value or below, sends a voltage abnormality signal S2. A voltage difference detecting part 5, when receives the light quantity detecting signal S1, measures the difference between the power generation voltage of respective panels 11-13, and when at least one of the measured voltage difference becomes the prescribed value or above, sends a voltage difference abnormality signal S3. An abnormality signal generating part 6, when it receives either of the voltage abnormality signal S2 and the voltage difference abnormality signal S3, sends a signal S4 to show the abnormality of the solar battery to a multiplexing part 7. The multiplexing part 7 multiplexes a solar battery abnormality signal S4 on a transmitting signal and transmits it through a transmitter 8 to a master station.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply monitoring system, and more particularly to a power supply monitoring system in which a master station monitors a plurality of solar cell panels installed in an unmanned slave station for abnormalities.

[0002]

2. Description of the Related Art Generally, in an unattended slave station using a solar cell as a power source, a battery is charged with electric power generated by the solar cell in the daytime, and the electric power from the battery is used to communicate with a master station. ing.

As a solar cell, a plurality of solar cell panels in which a large number of photoelectric conversion elements are arranged are installed. However, if the surface of the solar cell panel becomes dirty or dust adheres to it, the power generation capacity will decrease, so periodic inspections are required. And cleaning.

[0004]

As described above, conventionally, the surface of the solar cell panel is regularly inspected and cleaned. However, because it is necessary to set the timing of periodic inspections according to the weather conditions and installation location of each slave station, not only maintenance is troublesome, but in some cases the generated power is insufficient and There is a problem that the operation stops.

An object of the present invention is to provide a power supply monitoring system capable of facilitating maintenance management by allowing a parent station to monitor an abnormality of a solar cell panel of a child station and preventing an accident due to a reduction in power generation capacity. To do.

[0006]

A power supply monitoring system according to the present invention is a power supply monitoring system in which a master station monitors a plurality of solar cell panels provided in the slave station for abnormality. Means for measuring the power generation voltage of the plurality of solar cell panels when the light quantity is a predetermined value or more, and measuring the difference between the power generation voltage of the plurality of solar cell panels when the light quantity is a predetermined value or more Means for transmitting an abnormality signal indicating an abnormality when the measured value of the generated voltage becomes less than or equal to a predetermined value or the measured value of the generated voltage difference becomes greater than or equal to a predetermined value, and the abnormal signal Is multiplexed with the transmission signal and transmitted to the master station.

[0007]

The present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention, showing the configuration of a slave station. Here, solar cell 1
Is composed of a plurality of panels 11 to 13 and supplies the generated power to the battery 2. The transmitter 8 and the receiver 9 of the slave station communicate with the master station by the power from the battery 2, respectively.

Now, in order to monitor the power generation state of the solar cell, a light quantity detection unit 3 installed near the solar cell panel to detect the light quantity and a voltage detection section 4 to detect the power generation voltage of each of the panels 11 to 13 are provided. When the voltage difference detection unit 5 that detects the difference in the generated voltage between each panel and the voltage value of each panel is less than or equal to a predetermined value, or when the difference between the generated voltage between each panel is greater than or equal to a predetermined value An abnormal signal generation unit 6 that generates an abnormal signal indicating an abnormality of the solar cell and a multiplexing unit 7 that multiplexes the abnormal signal with the transmission signal are provided. Here, the voltage detection unit 4 and the voltage difference detection unit 5 operate when the light amount detection unit 3 detects a light amount of a predetermined value or more. That is, at night,
The voltage detection unit 4 and the voltage difference detection unit 5 stop the detection operation.

Next, the operation will be described.

The light amount detection unit 3 detects the amount of light incident on the solar cell panel and sends out a light amount detection signal S1 when the amount of light is equal to or greater than a predetermined value. The voltage detector 4 detects the light amount detection signal S1.
The power generation voltage of each panel 11 to 13 is measured while receiving the voltage, and the voltage abnormality signal S2 is transmitted when at least one of the measured voltages becomes equal to or lower than a predetermined value. Further, the voltage difference detection unit 5 measures the difference between the power generation voltages of the panels 11 to 13 when receiving the light amount detection signal S1, and the voltage is detected when at least one of the measured voltage differences becomes a predetermined value or more. The difference abnormality signal S3 is transmitted.

The abnormal signal generator 6 sends a solar cell abnormal signal S4 indicating an abnormality of the solar cell to the multiplexer 7 when receiving either the voltage abnormal signal S2 or the voltage difference abnormal signal S3. The multiplexing unit 7 multiplexes the solar cell abnormality signal S4 on the transmission signal and transmits the signal to the master station via the transmitter 8.

The master station constantly receives a solar cell abnormality signal from each slave station and monitors the occurrence of abnormality. If an abnormality occurs, go directly to the relevant slave station for maintenance and inspection.

[0014]

As described above, according to the present invention, in each slave station, when the amount of light incident on the solar cell is a predetermined value or more, the generated voltage of each solar cell panel and the difference between the generated voltage of each panel. When the voltage value of each panel falls below a predetermined value, or when the difference in the generated voltage between each panel exceeds a predetermined value, an abnormal signal indicating the abnormality of the solar cell is multiplexed in the transmission signal. By transmitting the data to the master station, the master station can constantly monitor the status of the solar cells of each slave station, which makes it easier to maintain and manage the slave stations at distant locations and generate solar cells. It is possible to prevent accidents due to reduced capacity.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

[Explanation of symbols]

 11-13 Solar cell panel 3 Light intensity detection unit 4 Voltage detection unit 5 Voltage difference detection unit 6 Abnormal signal generation unit 7 Multiplexing unit S1 Light intensity detection signal S4 Solar cell abnormality signal

Claims (1)

[Claims] 1. A power supply monitoring system in which a master station monitors a plurality of solar cell panels provided in the slave station for abnormalities, wherein the slave station has means for detecting an amount of incident light, and when the amount of light is a predetermined value or more. Means for measuring the power generation voltage of the plurality of solar cell panels, means for measuring the difference of the power generation voltage of the plurality of solar cell panels when the light quantity is a predetermined value or more, the measured value of the power generation voltage is predetermined When it is less than the value,
Or a means for transmitting an abnormal signal indicating an abnormality when the measured value of the generated voltage difference becomes a predetermined value or more, and means for multiplexing the abnormal signal with a transmission signal and transmitting the multiplexed signal to the master station. Characteristic power supply monitoring system.