JP3037646U - Uninterruptible power system - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To provide an uninterruptible power supply capable of instantaneously supplying power to a blackout of a commercial power supply while minimizing contracted power. SOLUTION: An in-house power generation device 2 installed side by side with a commercial power source 1.
In normal times, the commercial power source 1 and the load 20 are connected to
When the voltage detection unit 3 detects the voltage drop, it disconnects the connection with the commercial power source 1 and connects with the private power generator 2 side, and the private power generator 2 in normal times.
And the load 20 are connected, and when the second voltage detection unit 7 detects a voltage drop, the second switch switching unit 8 that disconnects from the private power generation device 2 and connects to the commercial power source 1 side
And a private power generation control unit 11 that is activated when the commercial power supply 1 is shut off by the first switch switching unit 4 so that the private power generation device 2 is fed to the full load 20.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an uninterruptible power supply device using an in-house power generator, and more particularly to an uninterruptible power supply device in which the in-house power generator is used as a regular power source to supply a load together with a commercial power source.

[0002]

[Prior art]

 The uninterruptible power supply is intended as an emergency power supply for banks' large-scale computer systems, hospital operating rooms, etc., and also to prevent malfunction of FA and OA equipment due to instantaneous voltage drop or surge. Used in.

[0003]

[Problems to be solved by the device]

 However, the conventional uninterruptible power supply is used as an emergency power supply as described above and is only used to prevent malfunction of the computer, so that it is not necessary for the customers who have a large contract power with the power company to pay the power bill. It was a heavy burden.

The present invention has been made in order to solve the above problems, and an object thereof is to provide an uninterruptible power supply device capable of instantaneously supplying power in the event of a power outage of a commercial power supply while keeping the contracted power to a minimum. And

[0005]

[Means for Solving the Problems]

 The uninterruptible power supply according to the present invention is provided adjacent to a commercial power supply and has a power generation capacity for supplying power to at least a load connected to the commercial power supply. In normal times, a predetermined capacity of the power generation capacity is generated to supply power to the load. A private power generator, a first voltage detector that detects a voltage drop of a commercial power supply, a second voltage detector that detects a voltage drop of the private power generator, and a commercial power supply and a load are connected in normal times. However, when the first voltage detection unit detects a voltage drop, it disconnects from the commercial power source and connects to the private power generator side, and the first switch switching unit and the private power generator in normal times. And a load, and when the second voltage detection unit detects a voltage drop, a second switch switching unit that disconnects the connection with the private power generation device and connects with the commercial power source side, and The switch switching unit of 1 allows commercial power supply. When blocked, in which a private power generation control unit that starts so as to feed the private power generation device to full load.

Further, the uninterruptible power supply of the present invention is provided with a commercial power source and has a power generation capacity for supplying power to at least a load connected to the commercial power source, and in normal times, generates a predetermined capacity of the power generation capacity. First private power generator for supplying power to the load, a second private power generator, a first voltage detection unit for detecting a voltage drop of the commercial power source, and a voltage drop of the first private power generator The second voltage detection unit is connected to the commercial power supply and the load in normal times, and when the first voltage detection unit detects a voltage drop, the connection to the commercial power supply is cut off and the first voltage is detected. The first switchgear switching unit connected to the private power generation device side of No. 1 and the first private power generation device and the load are connected in normal times, and when the second voltage detection unit detects a voltage drop, And disconnecting the connection with the first private power generator When the commercial power supply is cut off by the second switch switching unit connected to the power generator side and the first switch switching unit, the first private power generator is started to supply power to the full load. However, it is provided with a private power generation control unit that activates the second private power generator when the first private power generator is shut off by the second switch switching unit.

[0007]

[Embodiment of the invention]

 Embodiment 1 FIG. FIG. 1 is a block diagram showing a first embodiment of the present invention. In the figure, 1 is a commercial power source, 2 is an in-house power generator installed adjacent to a commercial power source 1, and supplies power to all loads 20 of the facility. It is set to supply power to, for example, almost half (for example, 55%) of the loads 20 in normal times.

Reference numeral 3 denotes, for example, an undervoltage relay, which is a first voltage detection unit for detecting a voltage drop of the commercial power source 1, and 4 is a control unit 5 and a switch 6 provided between the commercial power source 1 and the load 20. It is the 1st switch switching part provided. The control unit 5 has, for example, a coil (not shown) that switches the connection of the switch 6, and when the first voltage detection unit 3 detects the voltage drop of the commercial power supply 1, the private power generation device 2 is turned on. A signal for full operation is output to the private power generation control unit 11, which will be described later, and then the switch 6 is switched from the commercial power supply 1 to the private power generation device 2 side. The switch 6 normally connects the commercial power supply 1 and the load 20 to each other.

Reference numeral 7 denotes a second voltage detection unit, which is composed of an undervoltage relay similarly to the first voltage detection unit 3 described above, and detects a voltage drop of the private power generation device 2. Reference numeral 8 denotes a second switch switching unit including a control unit 9 and a switch 10 provided between the private power generator 2 and the load 20. The control unit 9 has a coil (not shown) like the control unit 5 described above, and when the second voltage detection unit 7 detects a voltage drop of the private power generation device 2, excites the coil. , The connection of the switch 10 is switched. The switch 10 connects the private power generation device 2 and the load 20 in normal times.

The above-described private power generation control unit 11 performs operation control so that the private power generation device 2 supplies power to almost half of the total loads 20 in normal times, and control is performed due to a power failure of the commercial power supply 1. When a signal from the unit 5 is input, it is controlled to perform full operation and supply power to the full load 20.

Next, the operation will be described. When the first voltage detection unit 3 detects a voltage drop of the commercial power supply 1 while the commercial power supply 1 and the private power generator 2 are supplying power to the full load 20 of the facility, the first switch switching unit The control unit 5 of 4 outputs a signal for fully operating the private power generation device 2 to the private power generation control unit 11, and then switches the connection of the switch 6 from the commercial power supply 1 to the private power generation device 2 side. On the other hand, the in-house power generation control unit 11 fully operates the in-house power generator 2 in response to the input of the above signal to generate the remaining power generation capacity, and supplies the insufficient power due to the cutoff of commercial power. Further, when the voltage on the side of the private power generator 2 decreases due to a failure or the like and the second voltage detector 7 detects this, the controller 9 of the second switch switching unit 8 causes the switch 10 to switch. The connection of is switched from the private power generator 2 to the commercial power source 1 side.

As described above, in normal times, the commercial power supply 1 and the private power generator 2 supply power to the entire load 20, and when the commercial power supply 1 fails, the private power generator 2 that is supplying power to the load 20 is Since the system is fully operated to replenish the shortage of power due to commercial power outages, it is possible to prevent confusion due to power outages, especially in areas where there are many power outages due to lightning strikes, etc. Since the electricity is supplied to customers, the contracted electricity can be suppressed to the minimum and the electricity bill can be saved.

Embodiment 2. FIG. 2 is a block diagram showing a second embodiment of the present invention, in which the same or corresponding parts as those of the first embodiment described in FIG.

In the figure, reference numeral 12 denotes a second auxiliary private power generation device, which has, for example, a power generation capacity that is substantially the same as the capacity of the first private power generation device 2 for normal power generation. As described in the first embodiment, the first private power generator 2 supplies electric power to the load 20 which is almost half of the total load 20 during normal operation, and when the commercial power supply 1 fails. Powers all loads 20.

Reference numeral 13 is a control unit 14 and a second switch switching unit including a switch 15 provided between the first private power generator 2 and the load 20. The control unit 14 has, for example, a coil (not shown) that switches the connection of the switch 15, and when the second voltage detection unit 7 detects the voltage drop of the first private power generation device 2, the second voltage detection unit 7 A signal for operating the private power generation device 12 is output to the private power generation control unit 16, and then the switch 15 is switched from the first private power generation device 2 to the second private power generation device 12 side. The switch 15 connects the first private power generator 2 and the load 20 in normal times.

Reference numeral 16 denotes an in-house power generation control unit, which controls the operation of the in-house power generation device 2 so as to supply power to almost half of the total loads 20 under normal conditions, and the control unit 5 due to a power failure of the commercial power supply 1. When the signal from the control unit 14 is input when the signal from the control unit 14 due to the voltage drop of the first private power generator 2 is input, The second power generation device 12 is controlled so as to generate power.

Next, the operation will be described. When the first voltage detection unit 3 detects a voltage drop of the commercial power supply 1 while the commercial power supply 1 and the first private power generator 2 are supplying power to the full load 20, The control unit 5 of the switch switching unit 4 outputs a signal for fully operating the first private power generator 2 to the private power generation control unit 16, and then switches the switch 6 from the commercial power source 1 to the first power supply. Switch to the private power generator 2 side. On the other hand, the private power generation control unit 16 fully operates the first private power generator 2 by inputting the signal to generate the remaining power generation capacity, and supplies the insufficient power due to the commercial power cutoff. Further, as described above, when the voltage on the first private power generator 2 side decreases due to a failure or the like and the second voltage detection unit 7 detects this, the control unit of the second switch switching unit 13 14 outputs a signal for operating the second private power generation device 12 to the private power generation control unit 16, and then connects the switch 15 to the first private power generator 2 to the second private power generator 12 Switch to the side. On the other hand, the private power generation control unit 16 operates the second private power generator 12 to generate power by the input of the signal, and supplies the insufficient power due to the stop of the first private power generator 2.

As described above, in the second embodiment, when the commercial power source 1 and the first private power generator 2 supply power to the full load 20 in normal times and the commercial power source 1 fails, The first private power generator 2 that is supplying power to the load 20 is fully operated to replenish the insufficient power due to the commercial power outage, and the commercial power supply 1 and the first private power generator 2 supply power. At this time, when the first private power generator 2 stops, the second private power generator 12 supplies the electric power, so that stable power can be supplied in addition to the effect of the first embodiment. There is an effect.

[0019]

[Effect of the invention]

 As described above, according to the present invention, the commercial power supply and the private power generator supply power to all loads during normal times, and when the commercial power supply fails, the private power generator that is supplying power to the load is fully operated. Since the power shortage due to the blackout of the commercial power supply is supplemented, it is possible to prevent the confusion due to the power outage, especially in areas where there are many power outages due to lightning strikes, etc. Contracted electricity can be kept to a minimum and electricity costs can be saved.

[Brief description of the drawings]

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

FIG. 2 is a block diagram showing a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Commercial power source 2 Private power generator 3 1st voltage detection part 4 1st switch switching part 7 2nd voltage detection part 8 2nd switch switching part 11 Private power generation control part

Claims (2)

[Utility model registration claims] 1. An in-house power generator that is provided adjacent to a commercial power supply and has a power generation capacity for supplying power to at least a load connected to the commercial power supply, and in normal times generates a predetermined capacity of the power generation capacity to supply power to the load. A first voltage detection unit that detects a voltage drop of a commercial power supply; a second voltage detection unit that detects a voltage drop of the private power generation apparatus; When the voltage detection unit detects a voltage drop, the first switch switching unit that disconnects from the commercial power source and connects to the private power generator side is connected to the private power generator and the load in normal times. However, when the second voltage detection unit detects a voltage drop, a second switch switching unit that disconnects the connection to the private power generation device and connects to the commercial power source side, and the first switch switching unit. When commercial power is cut off by Uninterruptible power supply being characterized in that a private power generation control unit that starts so as to feed the private power device to full load. 2. A first private house, which is provided adjacent to a commercial power supply and has a power generation capacity for supplying power to at least a load connected to the commercial power supply, and which normally generates a predetermined capacity of the power generation capacity to supply power to the load. A power generation device, a second private power generation device, a first voltage detection unit that detects a voltage drop of a commercial power supply, a second voltage detection unit that detects a voltage drop of the first private power generation device, and The commercial power source and the load are sometimes connected, and when the first voltage detector detects a voltage drop, the first power source is disconnected from the commercial power source and connected to the first private power generator side. The switch switching unit is connected to the first private power generation device and the load in normal times, and when the second voltage detection unit detects a voltage drop, the connection to the first private power generation device is cut off. Together with the second private power generator side second switch break Parts and, when said commercial power source is interrupted by a first switch switching unit, the first private power device starts so as to supply power to full load, the first by the second switch switching unit
An uninterruptible power supply system comprising: a private power generation control unit that starts the second private power generation device when the private power generation device is shut off.