WO2015189879A1 - Stabilized power source device and power distribution system using same - Google Patents

Abstract

Provided are: a stabilized power source device that can be easily installed without having to carry out an investigation with regard to the securing of an installation space or to the laying of wiring; and a power distribution system that uses the same. A stabilized power source device (1) comprises multiple power source units (2) and a board main body (3). Each of the multiple power units (2) has an input terminal (21) and an output terminal (22). The board main body (3) has an installation space (31). The multiple power units (2) are disposed one-to-one with multiple branch breakers. A control part controls the magnitude of the input voltage that has been input to the input terminal (21) so that such input voltage falls within a prescribed output range. The voltage controlled by the control part is output from the output terminal as the output voltage. The multiple power source units (2) are installed in the installation space (31).

Description

Stabilized power supply device and power distribution system using the same

The present invention generally relates to a stabilized power supply device and a power distribution system using the same, and more specifically, a stabilized power supply that adjusts the magnitude of an input voltage so as to be within a predetermined output range and outputs an adjusted voltage. The present invention relates to a device and a power distribution system using the same.

For example, in some countries and regions, power supply from electric power companies is very unstable, and power outages may occur frequently. However, if system power with large fluctuations is supplied to the connected device as it is, the device may not operate normally. Therefore, a stabilized power supply device (stabilizer) that stabilizes the input power to the device is used in an environment where the power fluctuation is large. By supplying the system power to the device via the stabilized power supply device, the device can be protected.

As an example of this type of stabilized power supply device, a device that cuts off the connection with an electrical device when the supply voltage is out of a specified range, and reconnects when the voltage returns to a normal value and a specified time has passed. Has been proposed (for example, see Document 1: US Pat. No. 4,707,760A). Thereby, a connection apparatus can be protected from the big fluctuation | variation of a supply voltage.

Since the above-described conventional technology is a protective device installed for each device that supplies power, the number of devices is required. Therefore, there has been a problem that it is difficult to secure an installation space and to handle wiring.

The present invention has been made in view of the above reasons, and an object of the present invention is to provide a stabilized power supply device that can easily be installed and easily secured in installation space and wiring and a power distribution system using the same. .

The stabilized power supply device of the present invention includes an adjusting unit that is provided corresponding to a plurality of branch breakers and adjusts the magnitude of the input voltage input to the input terminal so as to be within a predetermined output range. A plurality of power supply units that output the voltage adjusted in step 1 as an output voltage from an output terminal, and a panel body having a mounting space for mounting the plurality of power supply units.

The power distribution system of the present invention is electrically connected to at least one of a distribution board capable of branching and supplying power supplied from the power system, a stabilized power supply, and the distribution board and the stabilized power supply. The distributed power supply is connected to the power supply path between the power supply unit and the load circuit so as to include at least one power supply unit among the plurality of power supply units.

1 is a configuration diagram of a stabilized power supply device of Embodiment 1. FIG. FIG. 3 is a configuration diagram of a power supply unit according to the first embodiment. FIG. 3 is a circuit diagram of the power supply unit according to the first embodiment. 3 is an explanatory diagram of a connection mode of Embodiment 1. FIG. 1 is a block diagram of a power distribution system according to a first embodiment. FIG. 3 is a configuration diagram of a power supply unit having the changeover switch of the first embodiment. 1 is a configuration diagram of a stabilized power supply device of Embodiment 1. FIG. It is explanatory drawing of the stabilization power supply device and uninterruptible power supply device of Embodiment 1. FIG. It is explanatory drawing of the stabilization power supply device using the storage battery of Embodiment 1, and an uninterruptible power supply device. 1 is a configuration diagram of a stabilized power supply device of Embodiment 1. FIG. 6 is an explanatory diagram of a connection mode of Embodiment 2. FIG. It is explanatory drawing of the connection aspect of Embodiment 3. FIG. It is a block diagram of the power distribution system of Embodiment 4. It is a block diagram of the power distribution system of Embodiment 5. FIG. 10 is an explanatory diagram of a connection mode of a fifth embodiment.

(Embodiment 1)
The structure of the stabilized power supply device 1 according to this embodiment is shown in FIG. The stabilized power supply device 1 includes a plurality of power supply units 2 and a panel body 3.

The plurality of power supply units 2 are provided corresponding to the plurality of branch breakers 63 (see FIG. 4). The plurality of power supply units 2 have an adjustment unit 23 (see FIG. 2) that adjusts the magnitude of the input voltage input to the input terminal 21 to be within a predetermined output range. The output voltage is output from the output terminal 22. The panel body 3 has a mounting space 31 for mounting the plurality of power supply units 2.

Moreover, it is preferable that the stabilized power supply device 1 further includes an input terminal block 4 and an output terminal block 5. The input terminal block 4 has a plurality of first terminals 41. The output terminal block 5 has a plurality of second terminals 51. The plurality of first terminals 41 correspond one-to-one to the plurality of power supply units 2, and each is electrically connected to the input terminal 21 of the corresponding power supply unit 2. The plurality of second terminals 51 correspond one-to-one to the plurality of power supply units 2, and each is electrically connected to the output terminal 22 of the corresponding power supply unit 2.

In addition, each of the plurality of power supply units 2 preferably has a blocking unit 24 (see FIG. 2) for stopping output of the output voltage. When the magnitude of the input voltage deviates from the allowable range, the cutoff unit 24 stops outputting the output voltage.

Furthermore, each of the plurality of power supply units 2 preferably has a return unit 25 (see FIG. 2) that restarts output of the output voltage when a predetermined return time has elapsed after the output of the output voltage is stopped. The return unit 25 resumes output of the output voltage when a predetermined return time elapses after the output of the output voltage by the interrupting unit 24 is stopped.

In the present embodiment, each of the plurality of power supply units 2 includes an input terminal 21, an output terminal 22, and a circuit block 20. As shown in FIG. 2, the circuit block 20 includes an adjustment unit 23, a blocking unit 24, and a return unit 25.

Hereinafter, the configuration of the stabilized power supply device 1 in the present embodiment will be described in more detail. However, the configuration described below is merely an example of the present invention, and the present invention is not limited to the following embodiment, and various modifications can be made according to design and the like. In the present embodiment, the arrangement and direction of each component will be described on the assumption that the stabilized power supply device 1 is installed on a wall. However, the present embodiment is not intended to limit the arrangement and direction of the stabilized power supply device 1.

In the present embodiment, the board body 3 of the stabilized power supply device 1 is made of, for example, a synthetic resin and is formed in a box shape with an open front surface. The panel body 3 is provided with a door (not shown) that can be opened and closed. This door is provided as a cover so as not to expose the equipment inside the panel body 3, and when performing maintenance such as inspection of the equipment inside the panel body 3, the door is opened to the inside of the panel body 3. Access is possible. In addition, the back plate of the panel body 3 has attachment holes formed at each of the four corners, for example, and can be attached to the wall with screws or the like.

A horizontally long input terminal block 4 is attached inside the board body 3 along the upper end of the back plate. A horizontally long output terminal block 5 is attached along the lower end. A horizontally long mounting space 31 is provided between the input terminal block 4 and the output terminal block 5 in parallel therewith. In the mounting space 31, for example, one DIN (Deutsche Industry Normen) rail is provided along the longitudinal direction. Further, a plurality of power supply units 2 are attached to the DIN rail side by side in the longitudinal direction.

In the present embodiment, the input terminal block 4 and the output terminal block 5 are made of, for example, a synthetic resin and are formed in a horizontally long rectangular parallelepiped shape. The input terminal block 4 has a plurality of first terminals 41 arranged along the longitudinal direction of the input terminal block 4. The output terminal block 5 has a plurality of second terminals 51 arranged along the longitudinal direction of the output terminal block 5. In addition, the first base 42 and the second base 52 are provided with attachment holes at each of the four corners. Thereby, the input terminal block 4 and the output terminal block 5 can be attached to the panel main body 3 with screws or the like, for example.

Each of the plurality of power supply units 2 has a case 26 made of, for example, a synthetic resin and formed in a rectangular parallelepiped shape. The case 26 is provided with an attachment portion (not shown), a circuit block 20, an input terminal 21, and an output terminal 22. The attachment portion is provided on one surface of the case 26, and the attachment portion can be attached to the DIN rail. The circuit block 20 is housed inside the case 26 and has a third terminal 231 and a fourth terminal 232. The input terminal 21 is provided on the upper plate of the case 26. The output terminal 22 is provided on the lower plate of the case 26. Further, the third terminal 231 is electrically connected to the input terminal 21. The fourth terminal 232 is electrically connected to the output terminal 22. In addition, the adjustment unit 23, the blocking unit 24, and the return unit 25 constitute a part of the circuit block 20.

Next, the internal configuration of each power supply unit 2 will be described in detail with reference to FIG. In the following, the internal configuration of one power supply unit 2 of the plurality of power supply units 2 will be described, but the plurality of power supply units 2 adopt the same configuration.

In the circuit block 20 of the present embodiment, the adjustment unit 23 includes a transformer 233, a detection unit 234, and a control unit 235. Each of the primary side of the transformer 233 and the detection unit 234 is electrically connected to the third terminal 231. Therefore, the input voltage input to the power supply unit 2 is input to the primary side of the transformer 233 and the detection unit 234 via the third terminal 231. The detector 234 rectifies the input voltage and divides the voltage level. The detecting unit 234 includes a diode bridge DB and a pair of voltage dividing resistors R1 and R2 connected in series. The ratio of the resistance values of the voltage dividing resistors R1 and R2 is, for example, R1: R2 = 99: 1. The voltage dividing resistors R1 and R2 are connected in parallel between the plus side and the minus side of the diode bridge DB.

In the present embodiment, the detection unit 234 is electrically connected to the control unit 235. In addition, a control unit 235 is electrically connected to a connection point between the voltage dividing resistors R1 and R2. On the other hand, when the number of turns of the primary coil of the transformer 233 is N1, and the number of turns of the secondary coil is N2, the turn ratio N2 / N1 of the transformer 233 is, for example, 5/4. In the present embodiment, the secondary side of the transformer 233 has a plurality of taps 291 to 294. The plurality of taps 291 to 294 are, for example, a first tap 291, a second tap 292, a third tap 293, and a fourth tap 294.

In the present embodiment, the first tap 291 is directly connected to one end of the fourth terminal 232 and generates a reference potential. The second tap 292 is, for example, a tap having a winding ratio N2 / N1 of 4/5. In this case, a voltage having a magnitude of 4/5 of the voltage input to the primary side of the transformer 233 is generated between the first tap 291 and the second tap 292. The third tap 293 is, for example, a tap having a winding ratio N2 / N1 of 1. In this case, a voltage having the same magnitude as the voltage input to the primary side of the transformer 233 is generated between the first tap 291 and the third tap 293. For example, the fourth tap 294 is a tap having a winding ratio N2 / N1 of 5/4. In this case, a voltage that is 5/4 of the voltage input to the primary side of the transformer 233 is generated between the first tap 291 and the fourth tap 294.

In this embodiment, the switch element 238 is electrically connected between each of the second, third, and fourth taps 292, 293, and 294 and the fourth terminal 232. The control unit 235 controls each of the switch elements 238 according to the magnitude of the voltage detected by the detection unit 234. In the present embodiment, the control unit 235 is configured using a microcomputer. The switch element 238 is, for example, a relay contact.

In the present embodiment, the shut-off unit 24 and the return unit 25 are realized by executing, for example, a microcomputer program. However, the blocking unit 24 and the return unit 25 may be provided separately from the adjusting unit 23.

Hereinafter, the connection mode and operation of the stabilized power supply device 1 in the present embodiment will be described. As shown in FIG. 4, the stabilized power supply apparatus 1 of this embodiment is installed under the distribution board 6 installed in the indoor wall. The distribution board 6 is, for example, a general residential distribution unit in which various internal devices such as a main breaker 62 and a plurality of branch breakers 63 connected to a power system (system power supply) 100 are attached to a cabinet 61. It is a board.

The plurality of power supply units 2 of the stabilized power supply device 1 are connected to the plurality of branch breakers 63 in a one-to-one correspondence via the first terminals 41. Each of the plurality of power supply units 2 is electrically connected to an individual load circuit 7 via the second terminal 51. That is, each of the plurality of power supply units 2 is electrically connected between any one of the plurality of branch breakers 63 and the load circuit 7. The load circuit 7 includes devices such as an air conditioner and a lighting fixture, an outlet, a switch, an indoor wiring, and the like.

Here, each of the plurality of power supply units 2 in the present embodiment stabilizes the input voltage so as to be within the range of the reference voltage (for example, 200 to 270 V) by the adjusting unit 23, and outputs it as an output voltage. However, when the input voltage deviates from an allowable range (for example, 180 to 290V), that is, when the input voltage is smaller than 180V or larger than 290V, the output of the output voltage is stopped by the cutoff unit 24. In addition, after the output of the output voltage is stopped by the shut-off unit 24, when a predetermined return time (for example, 3 minutes) elapses, the output of the output voltage is restarted by the return unit 25.

The transformer 233 steps down or boosts the input voltage input to the primary side. The detection unit 234 divides the magnitude of the input voltage rectified by the diode bridge DB to about 1/100 by the voltage dividing resistors R1 and R2. The voltage after the voltage dividing resistors R1 and R2 have divided the voltage is input to an input pin of a microcomputer that is the control unit 235. The control unit 235 specifies the maximum value of the voltage input from the input pin and determines whether or not the maximum value (hereinafter referred to as the target voltage) is within an allowable range.

As a result, when the target voltage is outside the allowable range, the control unit 235 outputs a signal for turning off all the switch elements 238 to the switch element 238. As a result, the input voltage input to the third terminal 231 is not output as the output voltage, and the output of the output voltage from the fourth terminal 232 stops.

On the contrary, when the target voltage is within the allowable range, the control unit 235 determines whether or not the target voltage is within the reference voltage range. As a result, when the target voltage is within the range of the reference voltage, the control unit 235 outputs a signal for turning on only the switch element 238 corresponding to the third tap 293 among the switch elements 238 to the switch element 238. Thus, the input voltage input to the third terminal 231 is output from the fourth terminal 232 as an output voltage without changing the magnitude of the voltage.

In addition, when the target voltage is within the allowable voltage and below the lower limit value of the reference voltage range, the control unit 235 switches a signal that turns on only the switch element corresponding to the fourth tap 294 among the switch elements 238. Output to element 238. As a result, the input voltage input to the third terminal 231 is boosted by a factor of 5/4 and output from the fourth terminal 232 as an output voltage.

On the other hand, when the target voltage is within the allowable voltage and exceeds the upper limit value of the reference voltage range, the control unit 235 turns on only the switch element corresponding to the second tap 292 among the switch elements 238. Is output to the switch element 238. As a result, the input voltage input to the third terminal 231 is stepped down by a factor of 4/5 and is output from the fourth terminal 232 as an output voltage.

Also, when the output of the output voltage from the fourth terminal 232 is stopped when the target voltage is outside the allowable range, the control unit 235 monitors until the target voltage falls within the allowable range again. If the target voltage falls within the allowable range and then continues for 3 minutes within the allowable range, the output of the output voltage is resumed.

In this way, the adjusting unit 23 stabilizes the input voltage input to the plurality of power supply units 2 so as to be within the reference voltage range if the input voltage is within the allowable range. Moreover, the interruption | blocking part 24 stops the output of an output voltage, and protects the load circuit 7, when the input voltage has deviated from the tolerance | permissible_range at the time of a high voltage or a power failure. Furthermore, after the output unit 25 stops outputting the output voltage, the output unit 25 resumes outputting the output voltage when a predetermined return time has elapsed.

Here, as in the stabilized power supply described in Document 1, a stabilized power supply installed for each device (hereinafter referred to as a main power supply for the main trunk) is normally one stabilized power supply. Even if it does not function, there is an advantage that it does not affect other stabilized power supply devices and connected devices. On the other hand, since there are as many stabilized power supply devices as the number of devices, there is a drawback in that it is difficult to secure installation space and route wiring.

On the other hand, a stabilized power supply device (hereinafter referred to as a residential stable power supply device) installed between the main breaker of the indoor distribution board and the system power supply is conceivable. Only one stabilized power supply unit is connected to all indoor devices. Only one stabilized power supply device needs to be installed indoors, and there is an advantage that installation is easier than a stabilized power supply device installed for each device. On the other hand, if one stabilized power supply device fails, there is a drawback that it affects all the indoor devices. Further, when the number of devices increases and the current capacity of the stabilized power supply device is changed, it is necessary to replace the entire stabilized power supply device. Further, there is a problem that the size and weight of the stabilized power supply itself are relatively large.

The stabilized power supply device 1 of the present embodiment is provided with a plurality of power supply units 2 that stabilize the output voltage in each of the plurality of branch breakers 63. Thereby, even when one power supply unit does not function normally, the load circuit 7 connected to another power supply unit is not affected. Further, the stabilized power supply 1 of the present embodiment includes the plurality of power supply units 2 in the panel body 3. Thereby, since only one stabilization power supply device 1 should just be installed indoors, it can install easily. Therefore, in the stabilized power supply 1 of the present embodiment, the disadvantages of the above-described main stabilized power supply apparatus and residential stabilized power supply apparatus have been eliminated, and without considering installation space and wiring arrangement, Easy to install. That is, according to the stabilized power supply device 1, there is an advantage that the installation space can be secured and the wiring can be easily and easily installed.

Next, the power distribution system according to this embodiment will be described.

The power distribution system includes a stabilized power supply device 1, a distribution board 6, a distributed power supply 8, and a load circuit 7. The distributed power supply 8 includes a power conditioner (hereinafter abbreviated as “power conditioner”) 81 and a PV (Photovoltaic) panel 82.

The distributed power supply 8 in this embodiment will be described with reference to FIG. However, the detailed structures of the power conditioner 81 and the PV panel 82 are not shown and described.

The power conditioner 81 includes an inverter (not shown) and converts DC power to AC power. The PV panel 82 has a plurality of solar cells (not shown) and the like, and is installed on a roof, for example, and generates power by sunlight. One end of an output cable (not shown) that outputs the generated DC power is connected to the PV panel 82. The other end of the cable is connected to the power conditioner 81.

Since the power conditioner 81 is interconnected with the power system 100, the power generated by the PV panel 82 can be supplied to the load circuit 7 to which the power of the power system 100 is supplied.

By the way, for example, when the power required to use the load circuit 7 is insufficient only by the power generated by the distributed power supply 8, the insufficient power can be supplemented by the power of the power system 100. .

When the power generated by the distributed power supply 8 is sufficient, the power obtained by subtracting the power used for the load circuit 7 from the power generated by the distributed power supply 8 is supplied to the power system (power system 100). It is also possible to reverse flow.

The power distribution system of this embodiment will be described with reference to FIG. A period in which the voltage input from the power system 100 to the power distribution system is within the allowable range is referred to as a supply period, and a period in which the voltage input from the power system 100 is outside the allowable range is referred to as a cutoff period. However, the period during which the power system 100 is blacked out and the power is cut off is called a blackout period.

Here, the power distribution paths 101, 102, 103 will be described with reference to FIG.

The distribution path 101 connects the secondary side of the plurality of branch breakers 63 and the plurality of first terminals 41 of the stabilized power supply device 1. The power distribution path 102 connects the output unit 811 of the power conditioner 81 and the main breaker 62 of the distribution board 6. The power distribution path 103 is a power distribution path used when the power conditioner 81 performs a self-sustained operation described later, and connects the output unit 812 of the power conditioner 81 and each of the second terminals 51 of the stabilized power supply device 1.

The self-supporting operation of the power conditioner 81 will be described. The power conditioner 81 constantly monitors the voltage of the power system 100. Further, the power conditioner 81 includes an output unit 811 for grid connection and an output unit 812 for independent operation. The power conditioner 81 performs a self-sustained operation during the interruption period and the power outage period. When performing the independent operation, first, the power conditioner 81 is disconnected from the power system 100 so that a reverse power flow does not occur in the power system 100. And the power conditioner 81 switches the output destination of electric power from the output part 811 for grid connection to the output part 812 for independent operation. An output unit 811 for grid connection is connected to the distribution path 102, and an output unit 812 for independent operation is connected to the distribution path 103. The power conditioner 81 can switch the distribution path between the supply period, the cutoff period, and the power failure period by switching the two output units 811 and 812.

During the supply period, the electric power generated by the distributed power supply 8 is input to the primary side of the main breaker 62 (see FIG. 4) of the distribution board 6 via the distribution path 102. Both the power from the power system 100 and the power generated by the distributed power supply 8 are supplied to the load circuit 7 via the power distribution path 101 and the stabilized power supply device 1.

During the interruption period, the electric power from the electric power system 100 is interrupted by the interruption unit 24 (see FIG. 2) of the power supply unit 2. The electric power generated by the distributed power supply 8 is input to the second terminal 51 (see FIG. 1) of the stabilized power supply device 1 through the distribution path 103. That is, the electric power generated by the distributed power supply 8 does not go through the circuit block 20 of the power supply unit 2 and is supplied to the load circuit 7 without being cut off by the cut-off unit 24. Therefore, even if the power from the power system 100 is cut off by the cut-off unit 24, the load circuit 7 can be used continuously.

During the blackout period, the power generated by the distributed power supply 8 is input to the second terminal 51 of the stabilized power supply 1 via the distribution path 103 and supplied to the load circuit 7. Therefore, even when the power system 100 is in a supply stop state due to a power failure or the like, the load circuit 7 can be continuously used.

Thus, by the self-supporting operation of the power conditioner 81, it is possible to switch the power distribution path to supply power to the load circuit 7 and continue to use the load circuit 7 in both the interruption period and the power failure period.

However, the stabilized power supply device 1 may not be used as a part of a power distribution system using the distributed power supply 8.

In addition, the plurality of power supply units 2 may not be installed between the plurality of branch breakers 63 and the load circuit 7. The plurality of power supply units 2 only need to be installed in a one-to-one correspondence with the plurality of branch breakers 63. For example, the plurality of power supply units 2 may be installed between the main breaker 62 and the plurality of branch breakers 63.

In the present embodiment, the panel body 3, the input terminal block 4, the output terminal block 5, and the case 26 of the plurality of power supply units 2 are made of synthetic resin, but these may not be made of synthetic resin, For example, it may be made of metal. The board body 3 may not have a door. Further, the mounting space 31 may not be provided with a DIN rail as in the present embodiment, and may be provided with an installation panel capable of fixing the plurality of power supply units 2 with screws or the like. In that case, the plurality of power supply units 2 need to have a mounting structure corresponding thereto.

Further, the transformer 233 included in the circuit block 20 of the power supply unit 2 may not be an insulating transformer in which the primary side and the secondary side are electrically insulated as in the present embodiment. The transformer 233 may be a single-winding transformer in which the primary winding and the secondary winding share a part, and the primary side and the secondary side are not electrically insulated. In the single-winding transformer, since the impedance of the shunt winding, which is a shared portion of the primary winding and the secondary winding, is small, the voltage fluctuation is small. Further, in the shunt winding, only the current corresponding to the turn ratio N2 / N1 between the primary winding and the secondary winding flows, so that the wire diameter of the winding can be made smaller than that of the insulating transformer. Therefore, by using the transformer 233 as a single-winding transformer, there is a possibility that it can be reduced in size and weight as compared with the case where the transformer 233 is an insulating transformer.

By the way, as a modification of the present embodiment, each of the plurality of power supply units 2 may have a changeover switch 27 for switching between three connection states as shown in FIG. In the first connection state among the three connection states, the adjustment unit 23 is electrically connected between the input terminal 21 and the output terminal 22. In the second connection state, the input terminal 21 is directly connected to the output terminal 22. In the third connection state, the input terminal 21 is electrically disconnected from the output terminal 22. Thereby, the user can select use / non-use for each of the plurality of power supply units 2. Further, the power supply to the load circuit 7 can be cut off without handling the breaker inside the distribution board.

In addition, this changeover switch 27 should just be the structure which switches at least two connection states among three connection states. The changeover switch 27 is preferably connected between the input terminal 21 and the third terminal 231 or connected between the fourth terminal 232 and the output terminal 22. With the changeover switch 27, the user can appropriately select whether or not to use each of the plurality of power supply units 2.

In the above connection mode, each power supply unit 2 has only one pair of output terminals 22, but each of the plurality of power supply units 2 preferably has a plurality of output terminals 22. For example, when two load circuits 73 with a rated current of 5 A are connected, if each power supply unit 2 has only one set of output terminals 22, two power supply units 2 are required. On the other hand, if each power supply unit 2 has a plurality of output terminals 22, two load circuits 73 can be connected to one power supply unit. Therefore, when each power supply unit 2 has a plurality of output terminals 22, the number of load circuits 7 that can be used is increased compared to a case where each power supply unit 2 has only one set of output terminals 22, The degree of freedom of the user is increased.

As shown in FIG. 2, each of the plurality of power supply units 2 desirably has a setting unit 28 that can set a return time. For example, each of the plurality of power supply units 2 has an operation unit 281. The operation unit 281 has a knob or button for setting a return time, and the user sets the return time using the operation unit 281. The return time set in the control unit 235 is overwritten by the return time set by the user, and the return time is changed. Thereby, the user himself / herself can set an appropriate return time according to the connected load circuit 7.

Incidentally, a large current (for example, due to a lightning strike) exceeding the allowable current range of the load circuit 7 may flow from the power system 100. In such a case, a large current flowing from the power system flows to the power distribution system of the present embodiment, and the circuit block 20 (see FIG. 1) of the power supply unit 2 and the load circuit 7 may malfunction. In order to prevent malfunction of the stabilized power supply 1 and the load circuit 7, the stabilized power supply 1 preferably has a short-circuit portion 91 as shown in FIG. The short-circuit part 91 electrically short-circuits between the 1st terminal 41 (refer FIG. 1) and the input terminal 21 (refer FIG. 1) of the power supply unit 2, when a heavy current flows into the stabilized power supply device 1. FIG. . The short-circuit portion 91 is configured using, for example, a surge absorbing element such as a varistor and a circuit component such as a fuse.

One end of a surge absorbing element (not shown) is connected to the ground. Further, the end of the surge absorbing element opposite to the end connected to the ground is electrically connected between the first terminal 41 and the input terminal 21. Therefore, since a large current flows to the ground through the surge absorbing element before reaching the circuit block 20, the short circuit portion 91 can protect the circuit block 20 and the load circuit 7. The fuse (not shown) is electrically connected on the path of the current flowing through the surge absorbing element.

In addition, when the power from the power system 100 is temporarily interrupted due to a power failure or the like, or when the voltage temporarily decreases, the load circuit 7 stops without being able to maintain sufficient power for continued use. Sometimes. In order to avoid such a situation, as shown in FIG. 8, an uninterruptible power supply (hereinafter referred to as UPS (Uninterruptable Power Supply)) 92 that automatically supplies power to the load circuit 7 without delay is provided. It is preferable. The UPS 92 omits the illustration and description of the detailed structure. The UPS 92 is installed between the first terminal 41 (see FIG. 2) of the stabilized power supply device 1 and the input terminal 21 (see FIG. 1) of the power supply unit 2. Furthermore, it is preferable that the UPS 92 is connected to a storage battery 93 as shown in FIG. In this case, the UPS 92 converts DC power from the storage battery 93 to AC power and supplies the stabilized power supply 1 with power. Therefore, the load circuit 7 can be continuously used even when a long-time power failure occurs.

Furthermore, as shown in FIG. 10, the stabilized power supply device 1 preferably includes a power detection unit 94 that detects power for power consumption display and overcurrent protection. The power detection unit 94 is installed between the first terminal 41 of the stabilized power supply device 1 and the input terminal 21 of the power supply unit 2. The power detection unit 94 includes a control unit (not shown), a communication unit (not shown), and the like. A control part is comprised using circuit components, such as a microcomputer (microcomputer) and a resistor, for example. The communication unit is configured using connectors necessary for wired communication and circuit components such as a wireless LAN (Local Area Network) antenna necessary for wireless communication. The power detection unit 94 monitors the voltage and current input to the stabilized power supply 1 and detects the power input to the stabilized power supply 1 by the control unit from these values. The power detection unit 94 can notify the user by transmitting a detection result (power value) to a display device using, for example, a liquid crystal display by the transmission unit. Further, when the power detection unit 94 detects a large current that may cause the circuit block 20 (see FIG. 1) or the load circuit 7 to malfunction, the power detection unit 94 transmits a signal to the load circuit 7 by the communication unit. It is possible to cut off the power to the circuit 7.

In the present embodiment, the load circuit 7 may not be included as a configuration requirement of the power distribution system. A plurality of load circuits 7 may be electrically connected to one power supply unit 2.

Furthermore, in this embodiment, although the distributed power supply 8 showed the example provided with the power conditioner 81 and the PV panel 82, not only this but the distributed power supply 8 may be provided with a storage battery, a fuel cell, etc.

By the way, in the distribution system of Document 1, the supply voltage from the power system 100 is out of the specified range, that is, in the interruption period and the power failure period, power is not supplied to the plurality of load circuits 7 until reconnection is performed. The load circuit 7 could not be used.

On the other hand, in the power distribution system according to the present embodiment, by using the distributed power supply 8, a plurality of load circuits 7 can be continuously used even during the interruption period and the power failure period.

That is, the power distribution system of the present embodiment includes a distribution board 6 that can branch and supply power supplied from the power system 100 and the stabilized power supply device 1. Furthermore, the power distribution system of this embodiment includes a distributed power supply 8 that is electrically connected to at least one of the distribution board 6 and the stabilized power supply device 1. The distributed power supply 8 is connected to the power supply path to the load circuit 7 so as to include at least one power supply unit 2 among the plurality of power supply units 2.

As described above, the power distribution system according to the present embodiment includes at least one of the plurality of power supply units 2 in the power supply path between the distributed power supply 8 and the load circuit 7. By doing so, it is possible to provide a power distribution system that can supply power to the load circuit 7 even when power from the power system 100 is cut off. Moreover, in the power distribution system of the present embodiment, since both the power from the power system 100 and the power generated by the distributed power supply 8 pass through the power supply unit 2 in the supply period, stable power is supplied to the load circuit 7. It is possible.

In the power distribution system of the present embodiment, it is preferable that a wiring (distribution path 103) for supplying power generated by the independent operation of the distributed power supply 8 to the stabilized power supply device 1 is provided.

Thus, in the power distribution system of this embodiment, by having the power distribution path 103, it is possible to supply power from the distributed power source 8 to the load circuit 7 even during the interruption period and the power failure period, and to continue using the load circuit 7. Is possible.

In the power distribution system of the present embodiment, the plurality of branch breakers 63 and the plurality of power supply units 2 correspond one-to-one, and the corresponding branch breakers 63 and the power supply units 2 are connected between the power system 100 and the load circuit 7. It is preferable that they are electrically connected in series.

Thereby, since it is easy to connect each of the plurality of branch breakers 63 and each of the plurality of power supply units 2, it is possible to expect improvement in construction efficiency when the stabilized power supply device 1 is constructed.

In the power distribution system of the present embodiment, one of the plurality of branch breakers 63 and each of at least two of the plurality of power supply units 2 are electrically connected in series between the power system 100 and the load circuit 7. It is preferable that they are connected.

Thereby, in the power distribution system of the present embodiment, even if one power supply unit 2 malfunctions, it does not affect the load circuit 7 that has passed through the other power supply unit 2 via the same branch breaker 63. Therefore, further improvement in reliability can be expected.

In the power distribution system of the present embodiment, the stabilized power supply device 1 preferably has a short-circuit portion 91 that flows current to the ground so that current that exceeds the allowable current range of the load circuit 7 does not flow to the load circuit 7.

Thereby, the power distribution system of the present embodiment can protect the connected load circuit 7 from a large current such as a lightning strike.

In the power distribution system of the present embodiment, the stabilized power supply device 1 preferably has a UPS 92 that supplies power to the load circuit 7 at the time of a power failure of the power system 100.

Thereby, in the power distribution system of the present embodiment, even when the power system 100 is temporarily out of power or low voltage, it is possible to continue power supply automatically without delay. Therefore, it is possible to use the load circuit 7 continuously.

In the power distribution system of the present embodiment, the UPS 92 is preferably connected to the storage battery 93.

Thereby, in the power distribution system of the present embodiment, it is possible to compensate for power that is not sufficient with UPS 92 alone. That is, the load circuit 7 can be continuously used during a long-time power failure and low voltage.

In the power distribution system of the present embodiment, the stabilized power supply 1 preferably has a power detection unit 94 that detects the power input to the stabilized power supply 1.

Thereby, in the power distribution system of the present embodiment, it is possible to notify the user by displaying the power (voltage and current).

(Embodiment 2)
The stabilized power supply 1 of the present embodiment is provided with a plurality of power supply units selected from two or more types of power supply units in which the panel body 3 is different from one another in current capacity, output range, and recovery time. The second embodiment is different from the first embodiment in that it can be attached to the space 31.

In addition, the structure of the stabilized power supply device 1 according to the present embodiment is common to the structure of the stabilized power supply device described in the first embodiment except for the above.

As shown in FIG. 11, in each of the plurality of power supply units 2, the current capacity of the components such as the transformer 233 and the changeover switch 27 is preferably greater than or equal to the current capacity of the branch breaker 63 to which the power supply unit is connected. . For example, if the current capacity of the branch breaker is 10 A, the current capacity of the power supply unit connected to the branch breaker 63 is preferably 10 A or more. Hereinafter, the current capacity of the component of the power supply unit having the smallest current capacity is defined as the current capacity of the power supply unit.

In this embodiment, load circuits 71, 72, 73 and 74 are used as the load circuit 7. The rated currents of the load circuits 71, 72, 73, 74 are 1A, 3A, 5A, 10A in order. In addition, branch breakers 631, 632, 633, 634, 635, and 636 having different current capacities are attached to the distribution board 6 as the plurality of branch breakers 63. The current capacities of the branch breakers 631 and 632 are 10A and 15A in order.

Here, for example, power supply units 201 and 202 having different current capacities are lined up. The current capacities of the power supply units 201 and 202 are 15A and 20A in this order. Each of the power supply units 201 and 202 has the same configuration except for the current capacity, and can be mounted in the mounting space 31.

In this embodiment, as an example, the power supply unit 201 is attached to the branch breaker 631. The power supply unit 202 is attached to the branch breaker 632. Further, since a current of 10 A can be taken out from the power supply unit 201, load circuits 71, 72, and 73 are connected to the power supply unit 201. Since a current of 15 A can be extracted from the power supply unit 202, a load circuit 74 is connected to the power supply unit 202.

Thus, it is preferable that the panel body 3 is configured so that a plurality of power supply units selected from two or more types of power supply units 201 and 202 having different current capacities can be mounted in the mounting space 31. If the current capacity of each of the plurality of power supply units 2 can be selected by the user, the power supply unit corresponding to each current capacity of the plurality of branch breakers 63 can be selected by the load circuit 7 to be used.

Next, when the output range of each of the plurality of power supply units 2 changes, the voltage range usable in the load circuit 7 changes. In the present embodiment, each of the plurality of power supply units 2 has a plurality of taps 291 to 294 on the secondary side of the transformer 233, and the output range can be set more finely as the number of taps increases.

In this embodiment, load circuits 75 and 76 are further used as the load circuit 7. The load circuit 75 can be used at 200 to 240V, and the load circuit 76 can be used at 200 to 220V. In this case, in order to use the load circuit 75, it is necessary to attach a power supply unit whose output range is 200 to 240V. In order to use the load circuit 76, it is necessary to attach a power supply unit whose output range is 200 to 220V.

Here, for example, power supply units 203 and 204 having different output ranges are lined up. The output ranges of the power supply units 203 and 204 are 200 to 240 V and 200 to 220 V in this order. Further, each of these power supply units 203 and 204 has the same configuration except for the output range, and both can be mounted in the mounting space 31.

In this embodiment, as an example, the power supply unit 203 is attached to the branch breaker 633. A power supply unit 204 is attached to the branch breaker 634. Further, since the output range of the power supply unit 203 is 200 to 240 V, the load circuit 75 is connected to the power supply unit 203. Since the output range of the power supply unit 204 is 200 to 220 V, a load circuit 76 is connected to the power supply unit 204.

Thus, it is preferable that the panel body 3 is configured so that a plurality of power supply units selected from two or more types of power supply units 203 and 204 having different output ranges can be mounted in the mounting space 31. Thus, the user can select and install a power supply unit having an appropriate output range according to the specifications of the load circuit 7.

Also, if the return time of each of the plurality of power supply units 2 changes, the time until the output is restarted after the output voltage of the power supply unit is stopped changes. That is, after the power supply to the load circuit 7 connected to the load circuit 7 is cut off and the power supply of the load circuit 7 is turned off, the timing at which the power supply of the load circuit 7 is turned on again changes. For example, even if the power supply of the load circuit 7 having a motor is turned off due to a power failure or the like, the load circuit 7 can be operated normally by using a power supply unit that is turned on after the motor is completely stopped. .

In this embodiment, load circuits 77 and 78 are further used as the load circuit 7. The load circuit 77 can be normally restarted with a return time of 1 minute after stopping. The load circuit 78 can be restarted normally after a recovery time of 3 minutes after stopping.

Here, for example, power supply units 205 and 206 having different return times are lined up. The return times of the power supply units 205 and 206 are 1 minute and 3 minutes in order. Each of these power supply units 205 and 206 has the same configuration except for the return time, and both can be mounted in the mounting space 31.

In this embodiment, as an example, the power supply unit 205 is attached to the branch breaker 635. A power supply unit 206 is attached to the branch breaker 636. Further, since the power supply unit 205 has a return time of 1 minute, a load circuit 77 is connected to the power supply unit 205. Since the output range of the power supply unit 206 is 3 minutes, the load circuit 78 is connected to the power supply unit 206.

Thus, it is preferable that the panel body 3 is configured so that a plurality of power supply units 2 selected from two or more types of power supply units 205 and 206 having different return times can be mounted in the mounting space 31. Thereby, the user can select and install a power supply unit having an appropriate recovery time according to the specifications of the load circuit 7.

Thereby, even when the power supply is interrupted by the branch breaker at the time of a power failure or the like, and the power supply of the load circuits 77 and 78 is cut off, the load circuits 77 and 78 can be normally operated after a sufficient recovery time. .

(Embodiment 3)
The stabilized power supply device 1 of the present embodiment is different from the first embodiment in that the panel body 3 is also used as the cabinet 61 of the distribution board 6. In addition, the structure of the stabilized power supply device 1 which concerns on this embodiment is common in the structure of the stabilized power supply device described in Embodiment 1 except the above.

The connection mode of this embodiment is shown in FIG. The plurality of power supply units 2 of the present embodiment are installed in a residential distribution board 6 installed on an indoor wall. The distribution board 6 includes a cabinet 61, a main breaker 62 connected to the power system 100, and a plurality of branch breakers 63. The cabinet 61 has not only a space for mounting various internal devices such as a main breaker 62 and a plurality of branch breakers 63 inside, but also a distribution space 64. The distribution space 64 is a space for mounting the plurality of power supply units 2, the input terminal block 4, and the output terminal block 5, and corresponds to the mounting space 31 in the first embodiment.

For example, in the cabinet 61, a plurality of branch breakers 63 are attached in a horizontal row, and a distribution space 64 is provided below the space where the branch breakers 63 are attached. The distribution space 64 is provided with an input terminal block 4, a DIN rail, and an output terminal block 5 in order from the top. The horizontal width of the distribution space 64 is the width of the space for mounting the plurality of branch breakers 63. It is almost the same.

Further, the plurality of power supply units 2 have the same configuration as that of the first embodiment, and can be attached to the DIN rail by the attaching portion of the case 26. Therefore, the plurality of power supply units 2 are attached to the plurality of branch breakers 63 in one-to-one correspondence on the DIN rail.

The first terminal 41 of the input terminal block 4 is electrically connected to each input terminal 21 of the plurality of power supply units 2. The second terminal 51 included in the output terminal block 5 is electrically connected to each output terminal 22 of the plurality of power supply units 2. Therefore, as in the first embodiment, the input voltage input to each of the plurality of branch breakers is input to each of the plurality of power supply units 2 via the first terminal 41 and the input terminal 21. The output voltage output from each of the plurality of power supply units 2 is input to the load circuit 7 via the second terminal 51 and the output terminal 22.

According to the configuration of the present embodiment, by using the panel body 3 of the stabilized power supply 1 and the cabinet 61 of the distribution board 6 together, the distribution board 6 has a plurality of power supply units 2, input terminal blocks 4, and outputs. The terminal block 5 is incorporated, and the stabilized power supply device 1 and the panel body 3 are integrated. Thereby, compared with the case where the stabilized power supply 1 is installed separately from the distribution board 6, the space occupied by the stabilized power supply 1 and the distribution board 6 can be reduced. In addition, wiring is simplified, and the stabilized power supply device 1 can be easily installed.

Note that the configuration of the present embodiment can be used in combination with the second embodiment.

(Embodiment 4)
The power distribution system of the present embodiment is different from that of the first embodiment in that the power distribution path to which the power generated by the distributed power supply 8 is supplied is different in the supply period. In addition, the structure of the power distribution system of this embodiment can be used together with Embodiment 2 and 3. Moreover, the same code | symbol is attached | subjected about the structure which overlaps with Embodiment 1, and detailed description is abbreviate | omitted.

The power distribution system of this embodiment will be described with reference to FIG. The power distribution path 104 is applied instead of the power distribution path 102 of the first embodiment. The power distribution path 104 connects the output of the power conditioner 81 and the first terminal 41 (see FIG. 1) of the stabilized power supply device 1.

During the supply period, the electric power generated by the distributed power supply 8 is input to the first terminal 41 of the stabilized power supply device 1 through the power distribution path 104. The electric power from the electric power system 100 is input to the first terminal 41 of the power supply unit 2 through the distribution board 6 and the distribution path 101. These electric powers output from the second terminal 51 of the stabilized power supply device 1 are supplied to the load circuit 7.

Thereby, in the power distribution system of the present embodiment, even when there is no input unit for inputting power from the output of the power converter 81 to the distribution board 6, the power from the distributed power supply 8 is stabilized and the load circuit 7 is stabilized. Can be supplied.

(Embodiment 5)
The power distribution system of the present embodiment is different from that of the first embodiment in that the power distribution path to which power generated by the distributed power supply 8 is supplied is different. In addition, the structure of the power distribution system of this embodiment can be used together with Embodiment 2 and 3. Further, the same components as those in the first to fourth embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

The power distribution system of this embodiment will be described with reference to FIGS. 14 and 15.

In the following, the power supply units 201 to 207 are used as the power supply unit 2. As the branch breaker 63, branch breakers 631 to 636 are used. In the present embodiment, the branch breaker 636 is electrically connected to the two power supply units 206 and 207. The power supply unit 206 is electrically connected to the power supply unit 207 between the cabinet 61 of the distribution board 6 and the panel body 3 of the stabilized power supply 1.

The distribution paths 105 and 106 will be described with reference to FIG. The power distribution path 105 is applied instead of the power distribution path 102 of the first embodiment. The power distribution path 106 is applied instead of the power distribution path 103 of the first embodiment.

The distribution path 105 connects the output of the power conditioner 81 and the second terminal 51 connected to the power supply unit 207. The power distribution path 106 connects the output of the power conditioner 81 and the second terminal 51 connected to the power supply unit 206.

During the supply period, the power generated by the distributed power supply 8 is input to the second terminal 51 connected to the power supply unit 207 via the power distribution path 105. The power input from the second terminal 51 connected to the power supply unit 207 is output from the first terminal 41 connected to the power supply unit 207 via the circuit block 20 of the power supply unit 207. Since the power supply unit 207 and the power supply unit 206 are connected in parallel, the power output from the first terminal 41 connected to the power supply unit 207 is input to the first terminal 41 connected to the power supply unit 206. . Power from the power system 100 is supplied to the power supply unit 206 through the branch breaker 636 of the distribution board 6. The power output from the second terminal 51 connected to the power supply unit 206 is supplied to the load circuit 7.

During the interruption period, the power generated by the distributed power supply 8 is input to the second terminal 51 connected to the power supply unit 206 of the stabilized power supply device 1 through the power distribution path 106. Here, the power from the power system 100 is blocked from being supplied to the load circuit 7 by the blocking unit 24 of the power supply unit 206. However, since the power generated by the distributed power supply 8 does not pass through the circuit block 20 of the power supply unit 206, the power is supplied to the load circuit 7 without being cut off by the cut-off unit 24.

During the power failure period, the power generated by the distributed power supply 8 is input to the second terminal 51 connected to the power supply unit 206 via the power distribution path 106 and supplied to the load circuit 7. Therefore, the load circuit 7 can be used even when power from the power system 100 is not supplied.

As described above, in the power distribution system of the present embodiment, the power generated by the distributed power supply 8 is input to the power supply unit 2 and stabilized so that the voltage falls within the reference voltage range. It is possible to build a more reliable power distribution system.

Claims (19)

1. Provided corresponding to a plurality of branch breakers, and having an adjustment unit that adjusts the magnitude of the input voltage input to the input terminal so as to be within a predetermined output range, the voltage adjusted by the adjustment unit from the output terminal A plurality of power supply units that output as output voltages;
   And a board body having a mounting space for mounting the plurality of power supply units.
2. An input terminal block and an output terminal block;
   The input terminal block has a plurality of first terminals that correspond one-to-one to the plurality of power supply units, each of which is electrically connected to the input terminal of the corresponding power supply unit,
   The output terminal block corresponds to the plurality of power supply units on a one-to-one basis, and each of the output terminal blocks includes a plurality of second terminals that are electrically connected to the output terminals of the corresponding power supply units. Item 2. The stabilized power supply device according to Item 1.
3. The said panel main body is comprised so that attachment of these several power supply units selected from two or more types of power supply units from which a current capacity mutually differs is possible in the said attachment space. Stabilized power supply.
4. The said panel main body is comprised so that the said several power supply unit selected from two or more types of power supply units from which the said output range mutually differs can be attached to the said attachment space. Any one of Claim 1 thru | or 3 characterized by the above-mentioned. The stabilized power supply device according to claim 1.
5. Each of the plurality of power supply units includes a first connection state in which the adjustment unit is electrically connected between the input terminal and the output terminal, and the input terminal is directly connected to the output terminal. 2. A switch for switching at least two connection states between a second connection state in which the input terminal is electrically disconnected from the output terminal and a third connection state in which the input terminal is electrically disconnected from the output terminal. The stabilized power supply device as described in any one of thru | or 4.
6. Each of the plurality of power supply units has a plurality of the output terminals. The stabilized power supply device according to any one of claims 1 to 5.
7. The stabilized power supply device according to any one of claims 1 to 6, wherein the panel body is also used as a cabinet of a distribution board.
8. 8. The stabilized power supply device according to claim 1, wherein each of the plurality of power supply units includes a cutoff unit that stops the output of the output voltage. 9.
9. 9. The stable unit according to claim 8, wherein each of the plurality of power supply units includes a return unit that restarts output of the output voltage when a predetermined return time elapses after output of the output voltage is stopped. Power supply.
10. 10. The stable according to claim 9, wherein the panel body is configured to be capable of mounting the plurality of power supply units selected from two or more types of power supply units having different return times from each other in the mounting space. Power supply.
11. The stabilized power supply according to claim 9, wherein each of the plurality of power supply units includes a setting unit capable of setting the return time.
12. A distribution board capable of branching and supplying power supplied from the power system;
    The stabilized power supply device according to any one of claims 1 to 11,
    A distributed power source electrically connected to at least one of the distribution board and the stabilized power supply device,
    The distributed power supply system is connected to a power supply path to a load circuit so as to include at least one power supply unit among the plurality of power supply units.
13. The power distribution system according to claim 12, further comprising a wiring for supplying electric power generated by the independent operation of the distributed power source to the stabilized power source device.
14. The plurality of branch breakers and the plurality of power supply units correspond one-to-one, and the corresponding branch breakers and the power supply units are electrically connected in series between the power system and the load circuit. The power distribution system according to claim 12 or 13, characterized by the above.
15. One of the plurality of branch breakers and each of at least two of the plurality of power supply units are electrically connected in series between the power system and the load circuit. The power distribution system according to claim 12 or 13.
16. 16. The stabilized power supply device according to claim 12, further comprising a short-circuit portion that allows the current to flow to the ground so that current exceeding an allowable current range of the load circuit does not flow to the load circuit. Power distribution system according to item.
17. The power distribution system according to any one of claims 12 to 16, wherein the stabilized power supply device includes an uninterruptible power supply device that supplies power to the load circuit at the time of a power failure of the power system.
18. The power distribution system according to claim 17, wherein the uninterruptible power supply is electrically connected to a storage battery.
19. The power distribution system according to any one of claims 12 to 18, wherein the stabilized power supply device includes a power detection unit that detects power input to the stabilized power supply device.

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