JPH10285825A - Power supplying system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supplying system which effectively uses the power generated by a solar battery, using less power from a commercial power supply, and keeps a storage battery in such a charged condition that an optical communication terminal can be kept operating for at least a given period of time, even if the commercial power supply stops its operation. SOLUTION: A private power generation power supplying section 3 is provided with a solar battery 13 and a storage battery 15. The solar battery 13 generates power when set in the sun and supplies power to an optical communication terminal through a load power supplying section 9 and, at the same time, supplies power to the storage battery 15. The storage battery 15 is charged with power supplied from a commercial power supplementing and supplying section 5 and the solar battery 13, and then supplies charging power to the load power supplying section 9. The commercial power supplementing and supplying section 5 receives AC current from a commercial power supply and then converts the AC current to DC current to be supplied to the storage battery 15 and the load power supplying section 9. A power supply controller 7 controls the quantity of charging power of the storage battery 15 and the supplementary power supplied from the commercial power supplementing and supplying section 5, using the sensor information of an ammeter 25, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply system, and more particularly, to an optical communication terminal capable of supplying power for a certain period even when a commercial power supply is stopped due to a disaster or the like and efficiently using a solar cell. The present invention relates to an apparatus power supply system.

[0002]

2. Description of the Related Art A photovoltaic power generation system is a system for supplying power using a commercial power supply, a solar cell, and a storage battery, and is roughly classified into the following two types. One is a system in which electric power flows backward to a commercial power supply when there is surplus power in a solar cell, and the other is a system in which reverse power does not flow even when there is surplus electric power in a solar cell.

Japanese Unexamined Patent Publication No. 5-168171 discloses a power supply system which does not relate to a power supply system for an optical communication terminal device but does not cause excess power to flow backward. This system includes a solar cell, an inverter, and a storage battery. Normally, the solar battery is connected to the commercial power supply while charging the storage battery, and when the commercial power supply fails, the power supply is disconnected and the inverter operation type is switched, and the storage battery is switched to the chargeable / dischargeable type and It is a power supply device that operates with a storage battery. With this, the load is driven by the power generated by the solar cell in cooperation with the commercial power supply, and the storage battery is charged. When power cannot be supplied from the commercial power supply, the power stored in the storage battery and the power of the solar cell are reduced. To drive the load.

[0004] Japanese Patent Application Laid-Open No. 8-163793 discloses a power supply system in which surplus power flows backward. In this method, power is generated by a solar cell during daytime and supplied to an optical communication terminal device, and at the same time, a backup storage battery is charged and surplus power is sold to a power company, that is, reverse power flows. This is a power supply system for an optical terminal device that uses commercial power during the night and operates on the power of the storage battery during a power outage at night and during a power outage during the daytime when solar power is generated.

Conventionally, in such a power supply system of an optical communication terminal device, electric power is supplied from a commercial power supply at each installation location, and it is possible to supply power for at most several hours as a backup when the commercial power supply fails. Was equipped with a simple storage battery.

[0006]

However, when a conventional photovoltaic power generation system is applied to an optical communication terminal device, when a commercial power supply stops functioning due to a disaster or the like, a power supply system for the optical communication terminal device is provided. Function is not enough.

In the prior art disclosed in Japanese Patent Application Laid-Open No. 5-168171, it is assumed that a commercial power supply and a solar cell operate in an interconnected manner, so that power is supplied from the commercial power supply even at night. For this reason, the surplus charging power stored in the storage battery is not sufficiently and effectively used.

In the prior art disclosed in JP-A-8-163793, power is generated by a solar cell in the daytime, supplied to the device, and charged to a backup storage battery.
The generated power is used effectively by selling surplus power to the power company.However, at night, commercial power is used regardless of the amount of charge in the backup storage battery, so the power charged in the storage battery should be used effectively. It did not reduce the amount of commercial power used.

In these prior arts, the power supply system has a storage battery, but this charge amount is not sufficiently managed. For example, in the power supply system for an optical terminal device disclosed in JP-A-8-163793, power is used effectively as described above, but the charge amount of the backup storage battery is not considered at all. However, there was no consideration for securing the minimum amount of charge of the storage battery.

In addition, there is no disclosure of charging a storage battery from a commercial power supply when the charging power of the storage battery becomes insufficient. For this reason, even if the charge amount of the storage battery is not enough, it is charged only from the solar cell,
When power cannot be received from the commercial power supply, for example, even when a power failure occurs due to a disaster or the like, it is not sufficiently performed to secure a minimum charge amount capable of supplying power to the load for a predetermined time.

Japanese Patent Laying-Open No. 4-168935 discloses a power supply device that includes a solar cell and a storage battery, and charges the storage battery from the solar cell when the storage battery is not charged from an external power supply. However, in this power supply device, the storage battery is charged by an external power supply, but the main supply source of the charging power is not a solar cell but an external power supply, and as a result, the solar power is not effectively used. Also, it does not disclose any management of the charge amount of the storage battery.

On the other hand, in a communication terminal device using a metal transmission line, since the center is connected to a metal wiring, it is possible to supply power from the center using the metal transmission line. For this reason, the communication function is ensured even when the commercial power supply fails. However, in the optical communication terminal device, electric power is supplied from a commercial power supply at each installation location, so that electric power cannot be supplied from the center via the metal transmission line. That is, in the optical communication terminal device, after the power supply from the commercial power supply is stopped, the optical communication terminal device operates only for a time corresponding to the slight power charged in the storage battery.

A power generation system using a solar cell or the like is disclosed in the following publication.

JP-A-57-208830 discloses a residential solar cell having a circuit for preventing overcharging and overdischarging of a storage battery by using a solar illuminance sensor to switch between the power of the solar cell and the commercial power in accordance with the illuminance value. A power supply circuit is disclosed.
However, it does not relate to the power supply system of the optical communication terminal device, and there is no suggestion to use the power of the storage battery in order to effectively use the power of the solar battery and reduce the amount of use of the commercial power supply.

Japanese Patent Application Laid-Open No. 58-86829 discloses a solar power generation system that supplies power from a storage battery to a load while continuing charging by a solar battery when another power supply is interrupted during the process of charging the storage battery. Is disclosed. However, this is for systems used in homes, in which solar cells are only used to charge storage batteries, and only when a power outage occurs, the power of the storage batteries is used.To reduce the use of commercial power, the power of the storage batteries is used. There is no suggestion to do so.

Japanese Patent Application Laid-Open No. 58-86830 discloses a solar power generation system in which an output of a storage battery charged from a solar cell is converted into an alternating current by an inverter and supplied to a load, and the inverter is stopped when the load is small. A solar power generation system is disclosed. However, when the load is small, the inverter is stopped to improve the utilization rate of the solar cell, and there is no suggestion to use the power of the storage battery to reduce the amount of use of the commercial power supply.

JP-A-64-50723 has a battery for charging electric power generated by a solar cell,
There is disclosed a photovoltaic power generator in which the weather of the next day is preset by a preset switch for controlling an inverter, and the amount of charge to a battery can be changed at midnight by the switch. However, in order to reduce the battery capacity, the weather of the next day is preset in advance, and the amount of charge to the battery can be changed at midnight by using this switch. Has no suggestion to use battery power.

Japanese Unexamined Patent Publication No. Hei 6-30534 discloses that power generated by a solar cell is supplied through an inverter, and when the power from the solar cell is insufficient, the insufficient power is supplied from a commercial power supply. An invention that supplies power from a commercial power source when power generation of a solar cell is stopped is disclosed. However, this system does not include a battery, and there is no suggestion to use the battery power to reduce the use of commercial power.

Japanese Patent Application Laid-Open No. Hei 8-237883 discloses an invention in which a solar cell and an inverter are provided, and a control circuit for the storage battery and the inverter is provided therebetween.
However, the purpose is to prevent chattering of the inverter, and there is no suggestion to supply power to the load for a predetermined time or more when a commercial power supply fails.

Japanese Patent Application Laid-Open No. 8-2655982 discloses a solar cell power generator in which the output voltage of a solar cell is detected by voltage detecting means and the start-up timing of the inverter is changed based on the rate of increase of this voltage. ing. However, there is no suggestion to supply power to a load for a predetermined period of time or more when a commercial power supply fails, in order to effectively use the power of a solar cell by using an inverter, without providing a storage battery.

Japanese Patent Application Laid-Open No. 8-289578 discloses a photovoltaic power generation system in which a microcomputer for controlling the photovoltaic power generation system is provided with storage means for storing solar cell output data, solar radiation, temperature data, and the like. ing. However, although it has a storage unit for storing data of the amount of solar radiation, temperature, etc., it does not have a storage battery, and there is no suggestion to supply power to a load for a predetermined time or more when a commercial power supply fails.

Since these do not relate to the power supply system of the optical communication terminal device, there is no suggestion to perform communication with the external control device.

Therefore, an object of the present invention is to reduce the use of electric power from a commercial power supply by effectively using the electric power generated by a solar cell, and to set an optical communication terminal device at least to a predetermined level even when the commercial power supply stops functioning. It is an object of the present invention to provide a power supply system capable of securing a charge amount to be operated for a predetermined time for a storage battery.

[0024]

Therefore, the present invention has the following configuration.

In a power supply system according to the present invention, a power supply system for supplying power to an optical communication terminal device that performs communication via an optical transmission line, comprising a solar battery and a storage battery, and supplied from the solar battery. A self-generated power supply unit that supplies the generated power to the storage battery, and supplies main operating power to the optical communication terminal device from at least one of the generated power supplied from the solar cell and the stored power of the storage battery;
A commercial power supply unit that supplies supplemental power from the commercial power supply to the optical communication terminal device and supplies charging power from the commercial power supply to the storage battery, and controls the amount of charging power of the storage battery, the supply of main operating power, and the supply of supplementary power. A power supply control unit, the power supply control unit includes: a charge state detection unit that detects information about a charge state of the storage battery; and a charge power amount and a main operating power based on the information detected by the charge state detection unit. Supply,
And charging control means for controlling the supply of supplementary power.

As described above, the power supply control unit is provided, and the charge control means controls the amount of charging power, the supply of the main operating power, and the supply of the supplementary power based on the information on the charging state of the storage battery by the charging state detecting means. Therefore, the charging power of the storage battery can be used effectively. That is, in the self-generated power supply unit, the power for charging the storage battery from the solar cell and the main operating power for the optical communication terminal device are supplied.
The storage battery can be charged without using a commercial power supply, and power can be supplied to the optical communication terminal device. In the commercial power replenishment supply unit, supplementary power can be supplied from the commercial power supply to the optical communication terminal device according to the power that can be supplied from the solar battery and the storage battery to the optical communication terminal device. Can be used with higher priority. Further, since the charging power can be supplied from the commercial power supply to the storage battery in accordance with the charging power amount of the storage battery, the usage amount of the commercial power supply can be reduced. Therefore, it is possible to secure a predetermined amount of charge in the storage battery while suppressing the amount of use of the commercial power supply.

In the power supply system according to the present invention, the power supply control unit further includes a generated power detection unit for detecting information on the amount of generated power of the solar cell, and the charging control unit detects the generated power by the generated power detection unit. The amount of charging power, main operating power, and supplementary power may be controlled based on the information thus obtained and the information detected by the charging state detecting means.

As described above, the generated power detecting means is provided in addition to the charged state detecting means to detect the information on the charged state and the information on the generated power. If the electric power and the supplementary electric power are controlled, the generated electric power and the charged electric power can be used effectively, so that a predetermined charged amount can be secured in the storage battery while suppressing the use amount of the commercial power supply.

In the power supply system according to the present invention, the power supply control unit converts at least one of the electric power generated by the solar cell and the electric power charged by the storage battery into light when the electric power cannot be supplied from the commercial power supply. A power outage control means for supplying to the communication terminal device may be further provided.

By providing the power failure control means in this manner, even when the supply of commercial power is stopped, at least one of the power generated by the solar cell and the power charged by the storage battery can be supplied to the optical communication terminal device. Furthermore, since a predetermined amount of charge is secured in the storage battery, this terminal device can operate at least for the time specified by the above amount of charge.

In the power supply system according to the present invention, the power supply control unit may be supplied with power by at least one of charging power of the storage battery and power generated by the solar cell.

As described above, if the operating power of the power supply control unit is supplied from at least one of the charging power of the storage battery and the generated power of the solar cell, the power supply control unit can be operated even during a power outage, and the commercial power supply control unit can be operated. Power consumption can be reduced.

[0033] In the power supply system according to the present invention, the charging control means has a storage device for storing control parameters used for comparing and judging the control of the charging power and the supplementary power with respect to the threshold value. The threshold value may be changed by the control parameter.

As described above, by storing the control parameters serving as the threshold values and using them to change the threshold values,
Since the charging control means can be controlled in detail according to the operating environment, the present power supply system can be operated more efficiently.

In the power supply system according to the present invention, the power supply system further includes a transmission unit coupled to the optical transmission line, and the power supply control unit includes an internal state detection unit for detecting information on an internal state of the power supply system. The monitoring information may be transmitted by the transmitting unit based on the information detected by the internal state detecting unit.

As described above, if the internal state detecting means is provided to detect the information on the internal state of the system and is transmitted to the optical transmission line using the transmitting means, the system can be monitored even from a remote place. it can.

In the power supply system according to the present invention, the power supply system further includes transmission / reception means coupled to the optical transmission line, and the power supply control unit includes an internal state detection means for detecting information on an internal state of the power supply system. The transmitting / receiving means may transmit monitoring information based on information detected by the internal state detecting means, and may receive external control information created by an external control device based on the transmitted monitoring information. Good.

As described above, if the external control information of the present system transmitted by the external control device is received, a means for processing the control information from the information on the internal state becomes unnecessary in the present system. The system can be simplified and the system is controlled by an external control device.

The power supply system according to the present invention may further include receiving means coupled to the optical transmission line, and the receiving means may receive instruction information of the power supply control unit from the optical transmission line.

As described above, if the receiving means for receiving the instruction information from the external control device is provided, the operation of the present system can be controlled by the instruction information.

In the power supply system according to the present invention, the instruction information may be future sunshine information.

As described above, by adjusting or increasing or decreasing the amount of charge power of the storage battery in accordance with the future sunshine information, for example, the future sunshine time, the charge power of the storage battery can be used effectively. Can be reduced.

In the power supply system according to the present invention, the monitoring information may be information on at least the amount of sunlight and the amount of charging power.

In this way, if at least the monitoring information of the amount of sunlight and the amount of charging power is transmitted to the optical transmission line by the transmitting means, the solar battery and the storage battery can be monitored from a remote place. If the monitoring information is transmitted to the optical transmission line by the transmission / reception means, external control information relating to the monitoring information can be received.

[0045]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings. In addition, the same portions are denoted by the same reference numerals, and overlapping description will be omitted.

(First Embodiment) FIG. 1 is a schematic diagram showing an embodiment of a power supply system according to the present invention. The commercial power supply is an external power supply supplied from outside the present system, and in the present embodiment, a case of an AC power supply will be described.

First, the configuration of the power supply system of the present invention will be described with reference to FIG. Power supply system 1
Comprises a self-generated power supply section 3, a commercial power supply section 5, a power supply control section 7, a load power supply section 9 for supplying main operating power to the optical communication terminal device 80, and an optical transmission line 35.
And an external interface control unit 11 and the like to be connected to the server.

The self-generated power supply unit 3 includes a solar cell 13 and a storage battery 15. The photovoltaic cell 13 generates electric power in response to sunlight, supplies power to the optical communication terminal device (hereinafter, referred to as a terminal device) 80 via the load power supply unit 9, and stores the main operation power in the storage battery 15. Supply power. The storage battery 15 charges the power supplied from the commercial power supply / supply unit 5 and the solar cell 13, discharges the charged power as discharge main operating power, and supplies the discharged power to the load power supply unit 9.

The commercial power supply / supply unit 5 includes an inverter 2
3, or a DC stabilized power supply. These receive an alternating current (AC) current received from the commercial power supply 37 and supply a direct current (D) to the storage battery 15 and the load power supply control unit 9.
C) Convert to current.

The power supply control unit 7 controls the charging power and charging power of the storage battery 15 according to the power that can be supplied from the solar cell 13 to the storage battery 15, and the main operating power according to the charging power and the power generated by the solar cell 13. And the supplementary power is controlled in accordance with the main operating power that can be supplied from the private power generator 3 to the terminal device 80. That is, the amount of charge power of the storage battery 15 and the supplementary power supplied by the commercial power supplement supply unit 5 are controlled so that the usage amount of the commercial power supply 37 can be reduced. For this control, sensor information or the like received from the voltmeter 25, the ammeter 27, the pyranometer 29, the thermometer 31, or the like, or control information received from the external interface unit 11 is used. That is, as shown in FIG. 2, based on the information regarding the state of charge of the storage battery 15 from the state-of-charge detection means 71, or based on the information from the state-of-charge detection means 71 and the power generation of the solar cell 13 from the generated power detection means 73. Based on the information on the power, the amount of use of the commercial power supply 37 is reduced, and the charge power of the storage battery 15 and the power generated by the solar cell 13 are preferentially used within a range where a predetermined charge amount can be secured in the storage battery 15. The shortage is supplied from the power supply / supply unit 5 as supplementary power and charging power, and the amount of charging power, the supply of main operating power, the supply of charging power, and the supply of supplementary power are controlled.

As shown in FIG. 2, the power supply control unit 7
For this purpose, the charging state detecting means 71 and the charging control means 7
2, and further includes various means, for example, a generated power detection means 73, a power failure control means 75, an internal state detection means 76, and the like.

The function of these means will be described in detail. The state-of-charge detecting means 71 detects and processes information relating to the state of charge of the storage battery 15, for example, the charging voltage, charging current, output voltage, output current, etc. of the storage battery 15. . Charge control means 72
Controls the amount of charging power and the supply of main operating power, charging power, and supplementary power based on the information detected by the charging state detecting means 71, or the following generated power detecting means 73 and charging state detecting means 71 Based on the detected information, the charging power and the charging power, the main operating power, and the supply of the supplementary power are controlled. The generated power detection means 73 includes information on the amount of power generated by the solar cell 13, for example,
Output voltage, output current, etc. are detected and processed. The power failure control unit 75 controls to supply at least one of the power generated by the solar cell 13 and the charging power of the storage battery 15 to the terminal device 80 when the supply of the commercial power supply 37 is stopped.
The internal state detecting means 76 is provided in the power supply system 1.
In addition to the above information on the storage battery 15 and the solar cell 13 which is information on the internal state of the device, for example, a process is performed to detect the amount of sunlight, temperature, and the like, and to transmit the same by communication.

These means are provided by a central processing unit (CPU)
17, software 19, memory 19, register 21, etc.
It is realized by hardware or both.
It is preferable that the power supply control unit 7 is supplied with power from at least one of the solar cell 13 and the storage battery 15. By doing so, the power supply control unit 7 can be operated even when the commercial power supply 37 is stopped, so that the system 1 can be controlled.

The load power supply unit 9 converts the power supplied from the solar cell 13, the storage battery 15 and the commercial power supply unit 5 into a power mode (DC,
(AC or voltage) as appropriate.

As shown in FIG. 3, the external interface control unit 11 is provided with the transmitting means 8 connected to the optical transmission line 35.
1, one of the transmission / reception means 82 and the reception means 83 may be provided. The transmitting unit 81 transmits at least information on the amount of sunshine and the charging power among the monitoring information based on the information detected by the internal state detecting unit 76. The transmission / reception unit 82 transmits at least information on the amount of sunshine and charging power among the monitoring information based on the information detected by the internal state detection unit 76, and outputs the external control device 85 based on the monitoring information transmitted by the transmission / reception unit 82. And receives control information used by the power supply control unit 7. The receiving unit 83 receives instruction information to the power supply control unit 7 from the optical transmission line 35. When these units are provided, the power supply control unit 7 is coupled to the optical transmission line 35 via the terminal device 80, so that various data and the like are transmitted to the optical transmission line 35 by the transmitter provided in the terminal device 80. Alternatively, since the data and the like can be received from the optical transmission line 35 by the receiver, the already provided communication device and the like can be used for transmission and reception of monitoring information, control information, instruction information, and the like.

Further, the present system 1 receives sunlight in addition to a voltmeter 25 for measuring the voltage value of the solar cell 13 and the storage battery 15 and an ammeter 27 for measuring the current value of the solar cell 13 and the storage battery 15. A pyranometer 29 for measuring the amount of sunshine and a thermometer 3 for measuring the temperature near the installation of the system 1
A sensor for measuring the environmental condition of the system 1 such as the first system is provided. These measured values are processed by the power supply control unit 7 as necessary, and are used as internal information for controlling the system 1.

The changeover switches S1 to S5 are S1 between the solar cell 13 and the storage battery 15, S2 between the solar cell 13 and the load power supply section 9, S3 between the storage battery 15 and the commercial power supply section 5, S4 is arranged between the power supplement supply unit 5 and the load power supply unit 9, and S5 is arranged between the storage battery 15 and the load power supply unit 9. Opening and closing of these switches are controlled by the power supply control unit 7. As these switches, for example, electromagnetic relays can be used.

Next, an operation example of the present system 1 will be described with reference to FIGS.
This will be described with reference to FIG. 4 to 6, a state where the switch is closed is described as “ON”, and a state where the switch is opened is described as “OFF”.

FIG. 4 is an operation state diagram showing the relationship between the state of charge of the storage battery 15 and the states of the switches S1 to S5.
Information on the state of charge of the storage battery 15 is detected by the state-of-charge detection means 71, and the switches S1 to S5 are controlled by the charge control means 72. Vs is a voltage at which power can be supplied to the terminal device 80 for a predetermined time even after the commercial power supply 37 has failed. If the output voltage of the storage battery 15 is equal to or higher than Vs,
The storage battery 15 can be discharged. Vp is a voltage at which the electric power can be used because the electric power is sufficiently charged in the storage battery 15. In each state shown in FIG.
Since the information regarding the power generation amount of No. 3 has not been obtained, the state of the solar cell 13 is unknown.

In state 1, since the voltage of the storage battery 15 is less than Vs and the charge amount is not sufficient, it is necessary to urgently charge the battery. Therefore, S1 and S3 are closed, and the commercial power supply 37 and the solar battery 13 are used. Charge the battery. By doing so, the charging time is reduced by the amount of power generated by the solar cell 13 and the amount of use of the commercial power supply 37 is reduced. Since the state of the solar cell 13 is unknown, S2 and S5
Is opened, and S4 is closed to supply power from the commercial power supply 37 to the terminal device 80.

In state 2, the voltage of the storage battery 15 is equal to or higher than Vs and a predetermined amount of power is charged.
In order to reduce the amount of use of S7, S1 is closed and S3 is opened, and the storage battery 15 is charged only from the solar cell 13.
Although the state of the solar cell 13 is unknown, since the charge amount of the storage battery 15 can be discharged, S2, S4 and S5 are closed,
Power is supplied to the terminal device 80 from the solar battery 13, the storage battery 15, and the commercial power supply 37.

In state 3, since the voltage of the storage battery 15 is sufficient to discharge (Vp or more), S1 and S3 are opened and the storage battery 15 is not charged, S2 and S5 are closed, and S4 is opened to open the storage battery 15. Power is supplied from the power supply 15 to the terminal device 80 to reduce the usage of the commercial power supply 37.

FIG. 5 is an operation state diagram showing the relationship between the state of sunlight and the state of charge of the storage battery 15 and the states of the switches S1 to S5. The charging state detecting means 71 detects information on the charging state of the storage battery 15, and further detects the generated power detecting means 7.
3 detects information on the power generation state of the solar cell 13,
The charging control means 72 controls the switches S1 to S5.

In state 4, since the amount of power generated by the solar cell 13 is not sufficient and the amount of charge of the storage battery 15 is not sufficient, S1 and S3 are closed to charge the storage battery 15 quickly, and the Is connected to the storage battery 15. By doing so, the charging time is reduced by the amount of power generated by the solar cell 13 and the amount of use of the commercial power supply 37 is reduced. Since it is necessary to urgently charge the storage battery 15 using the power of the solar cell 13, S2 and S5 are opened and S4 is closed, so that the terminal device 80
To supply power.

In the state 5, although the amount of power generated by the solar cell 13 is not sufficient, the storage battery 15 has a predetermined (Vs or more) charge amount. Therefore, it is not necessary to charge the storage battery 15 urgently. Further, S3 is opened to charge the storage battery 15 from the solar battery 13. By doing so, the storage battery 15
Thus, the amount of use of the commercial power supply 37 can be reduced while securing a predetermined charge amount. In order to save the power of the storage battery 15 for the future because the power generation amount of the solar battery 13 is not enough, the charging power of the storage battery 15 can be discharged, but S2 and S4 are closed and S5 is opened to open the solar battery 13 In addition, power is supplied from the commercial power supply 37 to the terminal device 80. By doing so, it is possible to reduce the amount of use of the commercial power supply 37 by the amount of power generated by the solar cell 13 while maintaining the predetermined charging power of the storage battery 15.

In state 6, since the amount of power generated by the solar cell 13 is not sufficient, but the storage battery 15 has a sufficient charge to discharge, S1 and S3 are opened and the storage battery 15 is not charged. Opening and closing S2 and S5, power is supplied to the terminal device 80 from the solar cell 13 and the storage battery 15. By doing so, the amount of use of the commercial power supply 37 can be reduced while maintaining a predetermined amount of charge in the storage battery 15.

In state 7, since the amount of power generated by the solar cell 13 is sufficient and the amount of charge of the storage battery 15 is also sufficient, S1 and S3 are opened and the storage battery 15 is not charged. Since the amount of power generated by the solar cell 13 is sufficient, S2 and S5 are closed and S4 is opened to supply power from the solar cell 13 and the storage battery 15 to the terminal device 80. In this way, the amount of use of the commercial power supply 37 can be reduced while the charge amount of the storage battery 15 is sufficiently maintained.

In state 8, since the amount of power generated by the solar cell 13 is sufficient and a predetermined (Vs) charge amount is stored in the storage battery 15, it is not necessary to charge the storage battery 15 urgently. Close and open S3 to open solar cell 13
To charge the storage battery 15. By doing so, it is possible to reduce the amount of use of the commercial power supply 37 while securing a predetermined amount of charge in the storage battery 15. In addition, since the amount of power generated by the solar cell 13 is sufficient, S4 is opened and S2 and S5 are closed to supply power from the solar cell 13 and the storage battery 15 to the terminal device 80. By doing so, the amount of use of the commercial power supply 37 can be reduced while maintaining a predetermined amount of charge in the storage battery 15.

In state 9, the amount of power generated by the solar cell 13 is sufficient, but the amount of charge in the storage battery 15 is not sufficient. Therefore, to charge the storage battery 15 quickly, S1 is closed and S3 is opened, and The storage battery 15 is charged with electric power. By doing so, the storage battery 15 can be urgently charged using the solar cell 13. Since it is necessary to urgently charge the storage battery 15 by using the power of the solar cell 13, S2
And S5 are opened and S4 is closed to supply power from the commercial power supply 37 to the terminal device 80.

FIG. 6 is an operation state diagram showing the relationship between the presence or absence of power generation by the solar cell 13, the state of charge of the storage battery 15, and the states of the switches S1 to S5. Charge state detection means 71
, The information on the state of charge of the storage battery 15 is detected, the generated power detection means 73 detects whether the amount of power generated by the solar cell 13 is more than can be used for the system, and the switches S1 to S5 are used by the charge control means 72. Control.

In state 10, although the amount of power generated by the solar cell 13 is not sufficient and is less than the amount that can be used for the system, the amount of charge of the storage battery 15 is sufficient for discharging.
1, S2, S3 and S4 are opened and S5 is closed,
Power is supplied from the storage battery 15 to the terminal device 80 to reduce the amount of use of the commercial power supply 37.

In state 11, although the amount of charge is such that the storage battery 15 can be discharged, since there is no power generated by the solar cell 13, S1 is opened and S3 is closed, and the storage battery 15 is charged from the commercial power supply 37. Solar cell 13 and storage battery 15
Since S2 and S5 are not available, S2 and S5 are opened and S4 is closed to supply power from the commercial power supply 37 to the terminal device 80.

In the state 12, since no power is generated by the solar cell 13 and the storage battery 15 needs to be charged, S1, S2
And S5 are opened and S3 and S4 are closed to supply power from the commercial power supply 37 to the storage battery 15 and the terminal device 80.

As shown in states 10 to 12, the solar cell 1
In the case where there is no power generation at 3, the system 1 does not always receive the power supply from the commercial power supply 37 even at night, for example.
If the storage battery 15 has a sufficient charge,
, The amount of use of the commercial power supply 37 can be reduced.
In addition, when the storage battery 15 does not have a predetermined charge amount, it is also charged from the commercial power supply 37, so that the storage battery 15 holds a predetermined charge amount. Therefore, even when the commercial power supply 37 is stopped due to a disaster or the like, the time during which the terminal device 80 can operate can be set to a predetermined value or more.

State 13 is a case where the charge amount of the storage battery 15 is sufficient for discharging but cannot be used for the reason that it cannot be discharged, for example, the weather after tomorrow. Since the charge amount of the storage battery 15 is sufficient, S1
Then, S3 is opened and the storage battery 15 is not charged. Since the amount of power generated by the solar cell 13 does not satisfy the power required by the terminal device 80 and power cannot be supplied from the storage battery 15, S2 and S4 are closed and S5 is opened, so that power is supplied from the commercial power supply 37 to the terminal device 80. Supply.

In the state 14, since the power generated by the solar cell 13 is sufficient, S1 is closed and S3 is opened, and the storage battery 15 is charged from the solar cell 13. S2 is closed and S4 and S5 are opened to supply power to the terminal device 80 from the solar cell 13 as well. In this way, the commercial power supply 3
A predetermined amount of power can be secured in the storage battery 15 while reducing the usage of the battery 7.

If power cannot be supplied from the commercial power source 37, for example, if the supply of the commercial power source 37 is stopped or if the voltage of the commercial power source 37 falls below a predetermined value, the power failure control means 75 37 is detected, the power generated by the solar cell 13 and the storage battery 1
5 is supplied to the terminal device 80.

As described above in detail, in the present system 1, since the information regarding the state of charge of the storage battery 15 is detected by the state-of-charge detection means 71, it is possible to know the remaining amount of charge power of the storage battery 15. For this reason, when the remaining amount is insufficient, the storage battery 15 can be charged to a predetermined amount from the solar battery 13 and the commercial power source 37, and when the charged power has a surplus, the storage battery 15 can be used to the predetermined amount.
The power required to operate the terminal device 80 for a predetermined time or more can be left in the storage battery 15 while reducing the usage of the battery 7.

In addition to the above-mentioned charging information, if the information on the power generation state of the solar cell 13 is detected by the generated power detection means 73, the generated power of the solar cell 13 is used in preference to the commercial power supply 37, Since the shortage can be replenished and used from the commercial power supply 37, the power of the solar cell 13 can be effectively used, and the usage of the commercial power supply 37 can be reduced.

Further, in the power supply system 1 of the present invention, when the power supply
The judgment was made based on values such as p and Vs. That is, Vp and the like are threshold values for control. Therefore, in the present system 1, a storage device for storing such a threshold value as a control parameter may be provided, and the threshold value may be changed according to the control parameter to perform control. For example, in an area with four seasons like Japan,
Temperature, sunshine duration, etc. change greatly at each time. temperature,
The sunshine hours and the like are related to charging control. For this reason, if the control parameters relating to charging are read from the storage device and changed according to the season, the control parameters for charging can be changed according to the season. By doing so, the power generated by the solar cell 13 can be charged into the storage battery 15 efficiently. Note that the control parameters are stored in the power supply control unit 7.
Is preferably stored in the memory 19.

Further, in the power supply system 1 of the present invention, the external interface unit 11 may be provided to communicate with the external control device 85 through the optical transmission line 35.

The external interface unit 11 includes a transmitting means 81, a transmitting / receiving means 82 or a receiving means 83 as communication means coupled to the optical transmission line 35 via the optical communication terminal device 80. The monitoring information processed by the detecting means 76 may be transmitted, or the control information and the instruction information by the external control device 85 may be received.

As shown in FIG. 3A, the amount of solar radiation, temperature,
Monitoring information on the output current and output voltage of the solar cell 13, the charging voltage of the storage battery 15, the charging current, the discharging voltage, the discharging current, and the like is received from the power supply control unit 7 (the internal state detecting unit 76), and the sending unit 81 is used. Alternatively, the data may be transmitted to the optical transmission line 35 via the optical communication terminal device 80.

For example, it is preferable to send monitoring information regarding the amount of sunlight and the amount of power generated by the solar cell 13. By doing so, the state of the solar cell 13 can be monitored from a remote location. That is, since the amount of sunlight and the amount of power generated by the solar cell 13 are generally in a proportional relationship, if the amount of power generated by the solar cell 13 is small despite the large amount of sunlight, a system abnormality (for example, contamination of the surface of the solar cell 13). Alternatively, it is possible to detect that a failure has occurred due to a broken wire or the like, and conversely, if there is no failure, it is possible to detect that it is normal. Further, it is preferable to send monitoring information regarding the amount of sunlight and the amount of charge of the storage battery 15. In this way, the presence or absence of a failure in the storage battery 15 can be monitored from a remote location.

As shown in FIG. 3B, the monitoring information is received from the power supply control unit 7 (internal state detecting means 76) and transmitted to the optical transmission line 35 via the terminal device 80 using the transmitting / receiving means 82. The external control information may be transmitted from the optical transmission line 35 and generated by the external control device 85 based on the monitoring information and used by the power control unit 7. When the external control information is received as described above, the system for processing the control information from the information on the internal state is provided by the system 1.
, The system can be simplified.

As shown in FIG. 3C, the external control device 8
5 and used by the power control unit 7 may be received from the optical transmission line 35 by the receiving unit 83 via the terminal device 80. The instruction information may be either an instruction to the terminal device 80 or an instruction to the present system 1. In this way, the system 1 and the like can be directly controlled from the outside.

For example, it is preferable to receive an open permission signal of the device housing of the terminal device 80 as the instruction information. That is, since the terminal device 80 is a communication device, if the housing is opened without permission, information may be leaked. Therefore, by adding an electromagnetic door or the like to the lid of the housing and opening the housing only when an open signal is received, the terminal device 80 can be monitored. Alternatively, an instruction to supply the power generated by the solar cell 13 to the terminal device 80 may be received as the instruction information, and the control of the power supply control unit 7 may be directly performed by the external control device 85.

In particular, as the instruction information, information on future sunshine, for example, prediction information of the next day's sunshine state is received,
It is preferable to control the power supply. As shown in FIG. 7, when it is expected that the amount of sunshine on the next day is large based on the received post-sunlight information (FIG. 7A), the power of the storage battery 15 is preferentially used and the remaining storage battery 15 is used. The electric power is reduced, and the power generated by the
May be charged. When the amount of sunlight on the next day is not sufficient (FIG. 7B), the remaining power of the storage battery 15 is kept at the minimum necessary capacity. In addition, as the minimum required capacity, a charge amount corresponding to Vp or Vs can be considered, but Vs is preferable in order to effectively use the charging power.

A signal used for transmitting such information may be communication light having a wavelength of 1.3 μm or 1.5 μm, or monitoring light having a wavelength of 1.6 μm.

In order to construct an efficient system, it is necessary to accurately grasp the charge capacity of the storage battery 15. As shown in FIG. 8, when the difference between the actual storage battery remaining capacity value (FIG. 8A) and the measured capacity value (FIG. 8B) is large,
This is because the charging power cannot be used effectively. For example, a method of measuring the terminal voltage of the storage battery 15 can be considered in order to accurately grasp the remaining capacity. However, in order to increase the accuracy, the discharge voltage, the discharge current, the charging voltage, and the charging current of the storage battery 15 are processed. In addition, it is preferable to grasp the difference between the charging power amount and the discharging power amount. For this processing, it is preferable to use the power supply control unit 7 which can immediately grasp the state of the system when necessary. In order to simplify the system, it is preferable to use the external control device 85 via the optical transmission line 35.

As described in detail above, in the power supply system of the present invention, the power generated by the solar cell is effectively used to reduce the power consumption from the commercial power supply, and the commercial power supply stops functioning. However, it is possible to ensure that the storage battery has a charge amount that allows the terminal device to operate for at least a predetermined time.

[0092]

As described in detail above, in the power supply system of the present invention, since the power is supplied to the storage battery and the optical communication terminal device in accordance with the power generated by the solar cell, a commercial power supply is used. Without charging the battery and supplying power to the optical communication terminal device. Under the control of the power supply control unit according to the power supply from the private power generation power supply unit, supply supplementary power from the commercial power supply to the optical communication terminal device,
In addition, since the charging power is supplied from the commercial power supply to the storage battery, the power that can be supplied by the private power supply unit can be used in preference to the commercial power supply. In addition, a charge state detection unit is provided to use the charge power of the storage battery in preference to the commercial power supply based on the information on the charge state of the storage battery. Can be secured in the storage battery.

Therefore, the power generated from the solar cell is effectively used to reduce the power consumption from the commercial power supply, and even if the commercial power supply stops functioning, the charge amount at which the optical communication terminal device can operate for at least a predetermined time is reduced. It is possible to provide a power supply system for supplying power to the storage battery.

Further, if the generated power detecting means is provided, information on the amount of power generated by the solar cell is detected, and the amount of power charged in the storage battery is controlled according to the power generated by the private power generator. Therefore, the power of the solar cell can be used effectively, the amount of use of the commercial power supply can be suppressed, and a predetermined charge amount can be secured in the storage battery.

Further, if the transmitting means, the transmitting / receiving means or the receiving means are provided as communication means coupled to the optical transmission line via the optical communication terminal device, the monitoring means processed by the internal state detecting means by this communication means. Since the information can be transmitted or the control information and the instruction information from the external control device can be received, the present system can be monitored or controlled from a remote place.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a power supply system of the present invention.

FIG. 2 is an internal configuration diagram of a power supply control unit.

FIGS. 3A to 3C are internal configuration diagrams of an external interface unit.

FIG. 4 is an operation state diagram of the power supply system of the present invention.

FIG. 5 is an operation state diagram of the power supply system of the present invention.

FIG. 6 is an operation state diagram of the power supply system of the present invention.

FIG. 7 is a storage battery state diagram showing a relationship between the weather of the next day and the remaining amount of the storage battery.

FIG. 8 is a storage battery state diagram showing a relationship between the measured remaining capacity of the storage battery and the efficiency of the system.

[Explanation of symbols]

1: power supply system, 3: power generation unit
Reference numeral 5: Commercial power supply / supply unit, 7: Power supply control unit, 9: Load power supply unit, 11: External interface unit, 13 ...
Solar cell, 15 ... storage battery, 17 ... CPU, 19 ... memory, 21 ... register, 23 ... inverter, 25 ... voltmeter, 27 ... ammeter, 29 ... pyranometer, 31 ... thermometer, 35
... optical transmission path, 37 ... commercial power supply, 71 ... charge state detection means, 72 ... charge control means, 73 ... generation power detection means, 7
5 Power failure control means, 76 Internal state detection means, 80 Optical communication terminal device, 81 Transmission means, 82 Transmission / reception means, 8
3: receiving means, 85: external control device

Continuation of the front page (51) Int.Cl. ⁶ Identification code FI H02J 9/06 504 H02J 9/06 504B (71) Applicant 000004282 Nippon Battery Co., Ltd. 1 Nishinosho Ninobabacho, Kichijoin, Minami-ku, Kyoto, Kyoto, Japan Address (71) Applicant 000183392 Sumitomo Electric Co., Ltd. 2-4-1-4 Awaza, Nishi-ku, Osaka-shi, Osaka (71) Applicant 000110309 Toyokuni Electric Wire Co., Ltd. 2-30-11 Minamiikebukuro, Toshima-ku, Tokyo (71) Applicant 000245139 J-Cos Co., Ltd. 1-6-1, Meguro, Meguro-ku, Tokyo (71) Applicant 000141060 Kandenko Co., Ltd. 4-83, 33-Shibaura, Minato-ku, Tokyo (72) Inventor Akira Ishida 1 Tayacho, Sakae-ku, Yokohama-shi, Kanagawa Prefecture Address Sumitomo Electric Industries, Ltd. Yokohama Works Co., Ltd. (72) Inventor Ama Onuki 1-25-17 Maehara Nishi, Funabashi City, Chiba Prefecture (72) Inventor Masami Kurosawa 1-4-3 Daisaku, Sakura City, Chiba Prefecture Kyocera Corporation (72) Inventor Takayuki Ohashi Kichijoin, Minami-ku, Kyoto, Kyoto No. 1 Ino Babacho, No. 1, Japan Battery Co., Ltd. (72) Inventor Eiji Nakamura 2-4-1, Awaza, Nishi-ku, Osaka-shi, Osaka Sumitomo Electric Co., Ltd. (72) Inventor Masaro Yoshida 4125 Saitama, Gyoda-shi, Saitama Address Toyokuni Electric Wire Co., Ltd. (72) Inventor Yukio Toyama 1-6-1, Meguro, Meguro-ku, Tokyo Inside Jacos Co., Ltd. (72) Inventor Yoshinori Mitani 4-83-3, Shibaura, Minato-ku, Tokyo Seki Co., Ltd. Inside the electrician

Claims (10)

[Claims] 1. A power supply system for supplying power to an optical communication terminal device that performs communication via an optical transmission line, comprising: a solar battery; and a storage battery, wherein the generated power supplied from the solar battery is stored in the storage battery. And a self-generated power supply for supplying main operating power to the optical communication terminal device from at least one of the generated power supplied from the solar cell and the stored power of the storage battery; and the optical communication terminal from a commercial power supply Supply supplemental power to the device,
And a commercial power supplementary supply unit that supplies charging power from the commercial power supply to the storage battery; and a power supply control unit that controls supply of the storage battery, supply of the main operating power, and supply of the supplementary power. The power supply control unit includes: a charging state detecting unit that detects information about a charging state of the storage battery; and a supply of the charging power amount, the main operating power based on the information detected by the charging state detecting unit, and A power supply system comprising: charge control means for controlling supply of supplementary power. 2. The power supply control unit further includes a generated power detection unit configured to detect information related to an amount of generated power of the solar cell, and the charging control unit includes the information detected by the generated power detection unit and the information detected by the generated power detection unit. 2. The power supply system according to claim 1, wherein the charging power amount, the main operating power, and the supplementary power are controlled based on information detected by a charging state detection unit. 3. 3. The optical communication terminal device, wherein when the power supply from the commercial power supply is not received, the power supply control unit uses at least one of the power generated by the solar cell and the power charged by the storage battery. 3. The power supply system according to claim 1, further comprising a power failure control unit that supplies power to the power supply. 4. 4. The power supply according to claim 1, wherein the power supply control unit is supplied with power by at least one of charge power of the storage battery and power generated by the solar cell. system. 5. The charge control means has a storage device for storing a control parameter used when comparing and judging the control of the charging power amount and the control of the supplementary power with respect to a threshold value. The power supply system according to claim 1 or 2, wherein the threshold value can be changed. 6. The power supply control unit further includes: a transmission unit coupled to the optical transmission line, wherein the power supply control unit includes an internal state detection unit configured to detect information regarding an internal state of the power supply system. The power supply system according to claim 1 or 2, wherein the monitoring information is transmitted based on the information detected by the internal state detecting means. 7. The power supply control unit further includes an internal state detection unit configured to detect information on an internal state of the power supply system, the transmission and reception unit being coupled to the optical transmission line. Transmitting monitoring information based on information detected by the internal state detecting means, and receiving external control information created by an external control device based on the monitoring information transmitted. The power supply system according to claim 1 or 2. 8. The apparatus according to claim 1, further comprising a receiving unit coupled to the optical transmission line, wherein the receiving unit receives instruction information of the power supply control unit from the optical transmission line. 3. The power supply system according to 2. 9. The power supply system according to claim 8, wherein the instruction information is future sunshine information. 10. The power supply system according to claim 6, wherein the monitoring information is information on at least the amount of sunlight and the amount of charging power.