JPH11113190A - Distributed power supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve convenience when an abnormality such as a service interruption, etc., occurs on a system power supply at night by a method wherein, when the abnormality in the system power supply is detected by a system power supply monitoring means, a lighting operation is practiced by utilizing a power stored in a power storing means. SOLUTION: When an abnormality such as a service interruption, etc., occurs in a system power supply 4, a system power supply monitoring means 6 detects the abnormality and informs a power storing means 5 and an indicator 3A of the abnormality. The power storing means 5 outputs a stored DC power to a power conditioner 2. After the DC power is converted into a power for driving the power conditioner 2 and the indicator 3A, a part of the power is outputted to the indicator 3A to light an emergency light bulb 10. With this constitution, the abnormality in the system power supply 4 can be recognized quickly and, further, if the abnormality in the system power supply 4 occurs at night, the lighting effect of the emergency light bulb 10 enables an action coping with the abnormality of the system power supply 4 without interference and quickly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distributed power supply system for converting DC power generated by a power source such as a solar cell or a fuel cell into AC power synchronized with a system power supply and outputting the AC power.

[0002]

2. Description of the Related Art In recent years, a distributed power supply using photovoltaic power generation and a system power supply (commercial power supply) are interconnected, and surplus power that is supplied to home appliances (loads) by photovoltaic power generation is used as system power supply. In the case where solar power alone cannot provide power while the reverse power flows, a distributed power supply system that supplies power from the grid power supply side has been developed, and such a system is called a solar power generation system. .

[0003] The photovoltaic power generation system is configured as follows. That is, the photovoltaic power generation system includes a solar cell, and power conversion means for converting DC power generated by the solar cell into AC power synchronized with a system power supply. A connection box (consisting of a diode and a switch) for connecting to the power conversion means in a state where the power supply is prevented, and a protection means for detecting an abnormality of the system power supply and controlling the connection state with the system power supply to turn on and off. ing. In the photovoltaic power generation system configured as described above, the power conversion unit, the protection unit, and the like are called a power conditioner.

With respect to the above photovoltaic power generation system,
The Ministry of International Trade and Industry has implemented a monitor system in which subsidies are provided at the time of installation. As a condition for enjoying the monitoring system, a user who desires the monitoring system is obliged to regularly (for example, every month) report the generated power amount.

[0005] Therefore, it has been demanded that the photovoltaic power generation system be provided with a configuration for storing and displaying data necessary for the report. However, the power conditioner that composes the photovoltaic power generation system is a large-sized device, and cannot be placed in a location that is easy for the user to monitor, such as a living room. It is often done. Therefore, the data indicating the AC power output status required for the above report [current instantaneous power generation, power generation, and integrated power generation (accumulated power generation since each solar power generation system was installed)] Outside, the operating state, the failure state, the display to display the failure content, etc. are provided separately from the power conditioner,
Furthermore, the separated display device is arranged at a position that is easy for the user to monitor, such as a living room. By providing such a display, the recording work for the report can be easily performed, and it is possible to sufficiently respond to the user's request to check the daily generated power amount.

[0006]

However, a distributed power supply system having such a display also has the following problems. That is, it has been pointed out that if an abnormality such as a power failure occurs on the system power supply side at night, it is not possible to quickly respond to the problem [lighting operation by emergency lighting (flashlight, etc.), radio listening, etc.]. Therefore, it has been desired to solve this problem by using a distributed power supply system.

Therefore, an object of the present invention is to enhance convenience when an abnormality such as a power failure occurs on the system power supply side at night.

[0008]

According to the first aspect of the present invention, there is provided a power conditioner for converting DC power generated by a power source such as a solar cell or a fuel cell into AC power synchronized with a system power supply. A distributed power supply system comprising: a system power supply monitoring unit that monitors whether an abnormality has occurred in the system power supply; and a power storage unit, wherein the system power supply abnormality is detected by the system power supply monitoring unit. And an emergency illuminating means for performing a lighting operation based on the electric power stored in the power storage means, and has the following effects. That is, when there is an abnormality in the system power supply, the emergency lighting means is automatically turned on.

According to a second aspect of the present invention, there is provided the distributed power supply system according to the first aspect, wherein the emergency illuminating means is provided on the display means. It has a great effect. That is, it is not necessary to provide a separate component as the emergency lighting device, and the component of the conventional display device can also be used, so that the number of components can be reduced and the size can be reduced.

According to a third aspect of the present invention, there is provided the distributed power supply system according to the second aspect, wherein the emergency lighting means also serves as a display lighting section of the display means. This has the following effect. That is, since the emergency lighting means is illuminated by turning on the display lighting section, the number of parts and the size can be further reduced.

According to a fourth aspect of the present invention, there is provided the distributed power supply system according to any one of the first to third aspects, wherein the power supply is turned on when an abnormality occurs in the system power supply. A backup power output switch that outputs a backup AC power generation command for generating backup AC power from the DC power stored in the power storage unit to the power conditioner in response to the input operation, and a system power supply that supplies the backup AC power. And a stand-alone operation output unit for outputting the power signal separately from the emergency power supply unit, and the backup power output switch is arranged near the emergency lighting unit, thereby having the following operation. That is, when the backup power output switch is turned on when an abnormality occurs in the system power supply, the backup AC power can be extracted from the independent operation output unit. Moreover, the operation of the backup power output switch is facilitated by receiving the illumination of the emergency illumination means.

According to a fifth aspect of the present invention, there is provided the distributed power supply system according to the fourth aspect, wherein the self-sustained operation output section is arranged near the emergency lighting means. This has the following effect. That is, the operation of taking out the backup power from the independent operation output unit under the illumination of the emergency lighting means is facilitated.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings.

[0014] First Embodiment FIG. 1 is a system diagram showing the arrangement of a solar power generation system is a distributed power supply system of the first embodiment of the present invention, the plan view of FIG. 2 Display It is.

The solar power generation system includes a power conditioner 2 for converting DC power input from a solar cell 1 into AC power synchronized with a system power supply 4, and output data such as an AC power output state of the power conditioner 2. , A power storage means 5, and a system power supply monitoring means 6 for monitoring whether or not an abnormality occurs in the system power supply 4.

The power conditioner 2 has an input side connected to the solar cell 1 and an output side connected to the system power supply 4. The power conditioner 2 converts the DC power generated by the solar cell 1 into AC power synchronized with the system power supply 4 and outputs the AC power to the system power supply 4 (mainly composed of an inverter).
Protecting means for detecting an abnormality of the system power supply 4 and controlling ON / OFF of a connection state with the system power supply 4 is provided. The power conversion means and protection means are not shown.

The display 3A is connected to the power conditioner 2 by a control line and a power line. As shown in FIG. 2, the surface of the display 3A has a display body 8 and an operation for switching the display of the display body 8. A switch unit 9A and an emergency lighting bulb 10 are provided. The display main body 8 includes a quantity display section 8a for digitally displaying (or an analog display) output data (AC power output state) from the power conditioner 2, and an operation state display section 8b for displaying an operation / stop state and presence / absence of a failure. It has.

The power storage means 5 stores the output power of the system power supply 4 or a part of the output power of the solar cell 1,
The output of the solar cell 1 is connected in parallel with the power conditioner 2. The power storage means 5 is composed of a battery such as a lead storage area.

The system power supply monitoring means 6 is provided with, for example, a relay having a B contact, detects an abnormality such as a power failure in the system power supply, and notifies the power storage means 5 of the detection. It has become.

In this embodiment, the emergency lighting bulb 10 constitutes an emergency lighting means.

Next, the operation of the solar power generation system will be described.

In the photovoltaic power generation system configured as described above, normally, DC power output from the solar cell 1 is converted into AC power synchronized with the system power supply 4 by the power conditioner 2 and then output to the system power supply 4. doing. At this time,
A part of the output power of the system power supply 4 or the output power of the solar cell 1 is taken into the power storage means 5 and stored therein.

If an abnormality such as a power failure occurs in the system power supply 4 during such power conversion operation, the system power supply monitoring means 6 detects the abnormality and notifies the power storage means 5 and the display 3A. .

Power storage means 5 notified of abnormality of system power supply 4
Then, the stored DC power is output to the power conditioner 2. The power conditioner 2 converts the DC power input from the power storage means 5 into driving power (control power supply: DC) for the power conditioner 2 and the display 3A, and outputs a part of the power to the display 3A. . System power supply 4
The display 3A that has been notified of the abnormality of the lamp lights the emergency lighting bulb 10 by the driving power input from the power conditioner 2.

By performing the above operation, when an abnormality occurs in the system power supply 4, the emergency lighting bulb 10 is turned on. Then, the emergency lighting bulb 1 is placed around the display 3A.
It becomes brighter with 0, and it is possible to quickly recognize that an abnormality has occurred in the system power supply 4. Furthermore, when an abnormality of the system power supply 4 occurs at night, the emergency lighting bulb 10
, The action corresponding to the abnormality of the system power supply 4 can be promptly performed without any trouble.

In the above embodiment, the display 3
An emergency lighting bulb 10 is provided in A to perform emergency (power failure, etc.) illumination. In addition, as shown in FIG. May be performed. In this case, since the conventional display body 8 is used as the emergency lighting means, it is not necessary to newly provide an emergency lighting means, and accordingly, the number of parts can be reduced, and the manufacturing cost and the size of the apparatus can be reduced. Can be.

Second Embodiment FIG. 4 is a configuration diagram of a photovoltaic power generation system of the present embodiment, and FIG. 5 is a plan view of a display device that constitutes the photovoltaic power generation system of the present embodiment. is there.

The photovoltaic power generation system of this embodiment basically has the same configuration as that of the first embodiment, and the same or similar parts as those of FIGS. The reference numerals are used, and the description thereof is omitted.

This photovoltaic power generation system includes an independent operation output terminal (outlet) 12 for emergency backup power supply output at the time of power failure of the system power supply 4 and a display 3B.
Is provided with a backup power output switch 9a in the operation switch section 9B provided in the power switch. The backup power output switch 9a is turned on when an abnormality occurs in the system power supply 4. Further, the backup power output switch 9a outputs a backup AC power generation command to the power conditioner 2 for generating backup AC power from the DC power stored in the power storage means 5 in response to the ON operation. ing.

The self-sustained operation output terminal 12 is an output terminal for backup power output provided in parallel with the system power supply 4 on the output side of the power conditioner 2. The output AC power is switched between the system power supply 4 side and the independent operation output terminal 12 side. The independent operation output terminal 12 configured as described above is arranged near the display 3B.

In the photovoltaic power generation system having the above configuration, the following operation can be performed during a power failure. That is, when an abnormality such as a power failure occurs in the system power supply 4, the display main body 8 of the display 3 </ b> B lights up to notify the abnormality of the system power supply 4 (the abnormality is notified by lighting the emergency lighting bulb 10). As well as the first embodiment, the area around the display 3B is illuminated to assist in the action at the time of a power failure at night.

This embodiment is characterized by the following operations. That is, in the event of a power failure during the lighting operation of the display means 3B, if it is desired to use the backup power supply, the backup power output switch 9a provided on the display 3B is turned on. At this time, if the power failure occurs at night, the operation of the backup power output switch 9a may be hindered. However, at the time of the power failure, the display 3B is automatically turned on. There is no hindrance to the operation of the switch 9a.

When the backup power output switch 9a is turned on, a backup AC power generation command is output from the backup power output switch 9a to the power conditioner 2. In the power conditioner 2 which has received the backup AC power generation command, the power storage device 5 is driven by the control power supply generated in the power conditioner 2 by the power storage supplied from the power storage means 5 to convert the input power storage to AC power. To output. At this time, the power conditioner 2 switches the output terminal to the independent operation output terminal 12 in response to the backup AC power generation command, and the backup AC power created by the power conditioner 2 is output to the independent operation output terminal 12. Is done. Therefore, at the time of a power failure of the system power supply 4, backup AC power can be extracted from the self-sustaining operation output terminal 12, and the extracted backup AC power can be used as a backup power supply. Also, when an abnormality (such as a power failure) of the system power supply 4 occurs at night, there is a risk that the operation of connecting various devices (radio, lighting equipment, etc.) to the independent operation output terminal 12 may be hindered. Since the self-sustained operation output terminal 12 is arranged near the display body 8 (or the emergency lighting bulb 10) which is automatically turned on, the self-sustained operation output terminal 12 is provided.
There is no hindrance to the operation of connecting various devices to.

In each of the embodiments described above, the present invention is implemented in a photovoltaic power generation system. However, the present invention can be implemented in another distributed power supply system using another power source such as a fuel cell. Needless to say.

[0035]

As described above, according to the present invention, even when an abnormality occurs in the system power supply at night, the emergency lighting means is automatically turned on. It became easier to deal with abnormalities. In addition, even when a backup power supply is created using the power stored by the power storage means, the operation of the backup power output switch and the self-sustained operation output unit can be easily performed by being illuminated by the emergency lighting means. The convenience in the event of abnormalities has also improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a photovoltaic power generation system according to a first embodiment of the present invention.

FIG. 2 is a plan view showing a display device constituting the solar power generation system according to the first embodiment.

FIG. 3 is a plan view of a display showing a modification of the first embodiment.

FIG. 4 is a diagram showing a configuration of a solar power generation system according to a second embodiment of the present invention.

FIG. 5 is a plan view showing a display device constituting the photovoltaic power generation system according to the second embodiment.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 solar cell 2 power conditioner 3A, 3B display 4 system power supply 5 power storage means 6 system power supply monitoring means 8 display body 8a quantity display section 8b operation state display section 9A operation switch section 9B operation switch section 9a backup power output switch 10 emergency Lighting bulb 12 Independent operation output terminal

Claims (5)

[Claims] 1. A power conditioner for converting DC power generated by a power source such as a solar cell or a fuel cell into AC power synchronized with a system power supply, and monitoring whether an abnormality has occurred in the system power supply. A system power supply system comprising: a system power supply monitoring unit, and a power storage unit, wherein when the system power supply monitoring unit detects an abnormality in the system power supply, the system is turned on based on the power stored in the power storage unit. A distributed power supply system comprising emergency lighting means for performing an operation. 2. The distributed power supply system according to claim 1, further comprising display means for displaying output data of said power conditioner, and said display means being provided with said emergency lighting means. A distributed power supply system characterized by the following. 3. The distributed power supply system according to claim 2, wherein the emergency lighting means also serves as a display lighting section of the display means. 4. The distributed power supply system according to claim 1, wherein an input operation is performed when an abnormality occurs in the system power, and the power storage unit receives the input operation and receives the input operation. A backup power output switch that outputs a backup AC power creation command for creating backup AC power from stored DC power to the power conditioner, and an independent operation output unit that outputs the backup AC power separately from a system power supply. And wherein the backup power output switch is arranged near a lighting unit main body constituting the emergency lighting means. 5. The photovoltaic power generation system according to claim 4, wherein the self-sustained operation output unit is arranged near the emergency lighting unit.