JPH0965583A - Feeding method and feeding equipment corresponding to emergency case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to effectively utilize clean, unlimited solar energy by dividing a group of loads into normal service loads and emergency loads and by supplying power generated by the solar cells and power stored in the storage batteries to an emergency load in a concentrated manner after a power service interruption of a commercial power source. SOLUTION: During an emergency when the supply of commercial power has suddenly stopped because of the occurrence of a disaster, power application to an output terminal 6 is interrupted by the action of an emergency power interrupting circuit 10 which has detected the power interruption. By doing this, the solar power not sufficient for the whole of the group of loads is supplied in a concentrated manner to an emergency load E1. Under this feeding state, the electric power still insufficient is compensated by a storage battery C. Load on the battery C is limited to a single or a small number of emergency loads E1, so that the continuous feeding to the emergency load E1 can be definitely guaranteed until the operation of an emergency diesel generator is started or a commercial power supply F can be recovered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, which uses a solar cell and a commercial power source together, has a primary purpose of effectively utilizing solar energy, and has a secondary purpose of functioning as an uninterruptible power supply. The present invention mainly relates to an emergency power supply method and power supply device for use in a computer-based information processing / transmission system.

[0002]

2. Description of the Related Art With the rapid economic growth of the underdeveloped countries, it has been a long time since the oil depletion problem, which is one of the most prominent energy sources or industrial material sources supporting this growth, has been seriously concerned. In addition, awareness of the problem that the global environment is gradually deteriorated due to the waste of petroleum fuels is gradually increasing. As a countermeasure, various effective utilization plans of natural energy have been promoted, but in particular, it is considerably put into practical use in the field of solar power generation. For example, the shortage of solar power generated by solar cells is supplemented by commercial power that has been merged (system connected) with an inverter, and if there is no surplus in solar power, there is a power supply system configured to sell power to a power company. It is in the practical stage. Alternatively, a power supply system for a TV relay station, which uses a solar cell as a power source, has been developed. On the other hand, computers have become indispensable nowadays as means for efficiently processing and transmitting information associated with daily activities of both public and private sectors. Therefore, the power supply to the computer is stopped due to the occurrence of a natural disaster or the like, and a serious inconvenience in which the central nervous system that controls various activities of the local community is paralyzed actually occurs.
Therefore, an uninterruptible power supply (UPS) has been developed in which a UPS switch is activated to switch from a commercial power source to a storage battery power source without interruption when the commercial power source fails. You.

[0003]

However, the conventional uninterruptible power supply device is limited by the capacity of the storage battery, and after power failure,
For example, it has only the ability to continue feeding for about 10 minutes.
In addition, it was developed exclusively for the purpose of emergency response to power outages, so it is a useless long item in normal times.
The investment efficiency in the uninterruptible power supply was inevitably low. In addition, the existing power supply system that uses both solar power and commercial power at the same time as the power failure, in order to prevent the risk of solar power flowing to the commercial power supply line (transmission line) under repair if there is a power outage during power sale. It is legally obligatory to provide a circuit that suspends the supply of solar power. Therefore, it is unsuitable as a power supply for a computer in which the information that has been input until now may disappear at the same time as a power failure. Therefore, an object of the present invention is to provide a power supply system that uses both solar power generated by a solar cell and commercial power,
An object of the present invention is to provide a power feeding method and a power feeding device for an emergency, the main purpose of which is to effectively utilize clean and inexhaustible solar energy, and the secondary function of which is to replace the conventional uninterruptible power supply.

[0004]

An emergency power supply method according to the present invention for achieving the above object is suitable for use as a power source for an information processing / transmission system using a computer. , A load group is divided into a normal load and an emergency load, and a solar battery with an attached storage battery is used as its main power source. A method of using a power supply circuit that centrally supplies the generated power and the stored power of the storage battery to the emergency load is adopted. At least the emergency load in the load group is a computer communication device, and the computer communication device is provided with communication line switching means for switching the connection from the ground communication line to the satellite communication line in an emergency. Good.

An emergency power supply device according to the present invention includes a solar cell, a storage battery for storing solar power generated by the solar cell, and a main power supply circuit for constantly supplying the solar power to a load group. It is connected in parallel to the end of the main power supply circuit to connect an emergency load and a regular load forming a load group, respectively, and supplements a shortage of the power supply of the solar power to the main output terminal and the slave output terminal and the load group. Therefore, in the event of an emergency such as a disaster, a commercial power supply circuit connected in parallel to the main power supply circuit, after the supply of commercial power is stopped, a predetermined time has elapsed,
An emergency shutoff circuit for shutting off the power supply to the secondary output terminal is provided.

[0006]

[Function] The solar cell with an attached electricity storage as a main power source for supplying electric power to the load group can always fully utilize its power generation capacity, so that not only is the investment efficiency extremely high,
It contributes to the waste of valuable petroleum resources and the suppression of deterioration of the global environment. This power supply device divides the load group into an emergency load and a regular load, and when the commercial power supply fails due to a disaster or the like, the generated power of the solar cell and the stored power of the storage battery are Since the power is concentratedly supplied to the emergency load, it is possible to reliably continue power supply to this emergency load even if the power outage is prolonged for a long time.

After the commercial power supply fails in an emergency,
When the load group is a computer, the input information can be saved within this predetermined time by cutting off the power supply to the secondary output terminals after a predetermined time has passed, so that there is no risk of losing valuable information. It can be resolved. Further, if the emergency load is a computer communication device, even if the ground communication line fails in the event of a disaster, automatic switching connection to the satellite communication line can be performed by the attached communication line switching means.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. 1 showing the overall structure of a power feeding device. This power supply device includes a solar cell panel A, a device body B, and a storage battery C.
And a solar power control circuit D including an MPPT controller and a solar relay group for controlling the solar power generated by the solar cell panel A are the main constituent elements. As shown on the right side of FIG. 1, the load group supplied with power from this power supply device is divided into a small number of emergency loads E1 and a large number of regular loads E2.

The solar cell panel A of this embodiment has an output of 8
2W battery module 1, 5 (series) ×
With 8 (parallel) connections, a total output of 3.28 KWh is obtained.

As shown in FIG. 1, the electric circuit constituting the apparatus main body B has a commercial power supply terminal 2 connected to a commercial power supply F.
, A solar power supply terminal 3 connected to the control circuit D, and a storage battery C
Storage battery terminal 4 connected to the main output terminal 5 and secondary output terminal 6 connected to the emergency load E1 and the normal load E2, respectively.
And Between the commercial power supply terminal 2 and the main and secondary output terminals 5 and 6, a rectifier circuit 7 for commercial power, an inverter 8 for converting the power generated by the solar cell panel A into an alternating current, a commercial power supply circuit 9, and an emergency circuit. The cutoff circuit 10 is connected by a circuit that is sequentially connected in series.

The commercial power supply circuit 9 joins the main power supply circuit a through which the solar power flows with an insufficient amount of the commercial power in order to compensate for the shortage of the solar power, and is connected to the commercial power supply terminal 2 by the bypass circuit b. ing. Emergency cutoff circuit 10
Is configured to cut off the power supply to the secondary output terminal 6 after a lapse of a predetermined time after the supply of commercial power is stopped due to the occurrence of a disaster or the like. The charging circuit c connecting the solar power supply terminal 3 and the storage battery terminal 4 is connected to the main power supply circuit in a crossed state. The main power supply circuit a is formed on the downstream side from the cross connection point. The emergency cutoff circuit 10 and the main and vertical output terminals 5 and 6 are connected by individual wiring.

2 and 3 house the other components of the power feeding device of this embodiment except the solar cell panel A,
It is a transparent front view and a transparent side view of a storage cabinet.
1 to 3, reference numeral 11 is an MPPT controller,
12 is a solar relay, 13 is an exhaust fan, 14 is a ventilation port, and 15 is a storage cabinet.

Next, the operation of the above configuration will be described separately for a normal time and an emergency such as a disaster.

First, in normal times, the solar power generated by the solar cell panel A passes through the control circuit D, the inverter 8, the commercial power supply circuit 9, and the emergency cutoff circuit 10, and then the emergency load E1 and the regular load E2 ( In this case, each PC)
And supplied respectively. The shortage of solar power supplied to this load group is compensated by the shortage of commercial power flowing into the main power supply circuit a due to the operation of the commercial power supply circuit 9, as in the conventional technique.

On the other hand, the storage battery C is always maintained in a charged state by a part of solar power or commercial power converted into direct current by the rectifier circuit 7.

Next, in an emergency when the supply of commercial electric power suddenly stops due to a disaster or the like, the power supply to the secondary output terminal 6 is cut off by the function of the emergency cutoff circuit 10 that detects this power failure. As a result, the solar power that is insufficient to completely cover the entire load group is concentratedly supplied to the emergency load E1. In this power feeding state, the power still insufficient is supplemented by the storage battery C.

Since the load that the storage battery C must bear is limited to a single or a small number of emergency loads E1, until the emergency diesel generator starts operating or commercial power is restored. , It is possible to reliably guarantee the continuation of power supply to the emergency load E1.

In addition, when the emergency load E1 of the load groups E1 and E2 is a computer communication device, a terrestrial communication line can be provided in an emergency by installing a communication circuit switching means (not shown). Immediately after a failure, the ground communication line can be automatically switched to the satellite communication line.

[0019]

As is apparent from the above description, the use of the power feeding method and power feeding device of the present invention in response to an emergency provides the following excellent effects as compared with the conventional ones of the same kind. To be (A) In normal times, the power generation capacity of the solar cell panel can be fully utilized, and it is sufficient to cover the shortage of power supplied to the load with commercial power. (B) Therefore, the investment efficiency in the power supply device is extremely high. (C) In order to have a function as an uninterruptible power supply,
Since the power selling circuit is omitted, even if the commercial power supply fails, it is not necessary to suspend the solar power supply. (D) Unlike conventional UPS, which is normally idle, it is always operated, so there is almost no fear that it will not operate due to an unexpected failure during a critical emergency. (E) In an emergency, if the ground communication line is damaged, the connection can be switched to the satellite communication line immediately.

[Brief description of drawings]

FIG. 1 shows an embodiment of the device of the present invention, and is a schematic circuit configuration diagram of the entire device.

FIG. 2 is a perspective front view of the power feeding device in which the other components except the solar cell panel are collectively housed.

FIG. 3 is a perspective side view of the same as above.

[Explanation of symbols]

 A solar cell panel B device body C storage battery D control circuit E1 emergency load E2 regular load F commercial power supply 1 battery module 2 commercial power supply terminal 3 solar cell terminal 4 storage battery terminal 5 main output terminal 6 vertical output terminal 7 rectifier circuit 8 inverter 9 Commercial power supply circuit 10 Emergency cutoff circuit 11 MPPT controller 12 Solar relay 13 Exhaust fan 14 Ventilation port 15 Storage cabinet

Claims (3)

[Claims] 1. A device suitable for use as a power source for a computer information processing / transmission system, etc., wherein a load group is divided into a regular load and an emergency load, and as its main power source, Using a solar cell with a storage battery attached,
In the event of a power outage of a commercial power supply that compensates for the lack of supply capacity, a power supply circuit for supplying the generated power of the solar cell and the stored power of the storage battery to the emergency load in a concentrated manner is used. Method. 2. At least an emergency load of the load group is a computer communication device, and the computer communication device switches a connection from a terrestrial communication line to a satellite communication line in an emergency, communication line switching means. The power supply method according to claim 1, further comprising: 3. A solar cell, a storage battery that stores solar power generated by the solar cell, a main power supply circuit that constantly supplies the solar power to a load group, and a main power supply circuit that is connected in parallel to the end of the main power supply circuit. , A main output terminal and a sub-output terminal for connecting an emergency load and a regular load, respectively, which compose the load group, and a parallel connection to the main power supply circuit in order to compensate for the insufficient supply of solar power to the load group. After the supply of commercial power is stopped in the event of an emergency such as a disaster,
An emergency cutoff circuit for cutting off power to the secondary output terminal after a lapse of a predetermined time.