WO2015015528A1

WO2015015528A1 - Power feed control device

Info

Publication number: WO2015015528A1
Application number: PCT/JP2013/004609
Authority: WO
Inventors: 瑞邱関
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2013-07-30
Filing date: 2013-07-30
Publication date: 2015-02-05
Also published as: JPWO2015015528A1; JP6187920B2

Abstract

In the present invention, a dispersed power source accumulates, in a storage cell, power generated by a solar power generation device and supplies the power accumulated in the storage cell to the outside. A switch connects the dispersed power source and a load in a dwelling. A control unit predicts, in a future prescribed time period, the power generation amount of a solar power generation device and the demand of a load. If a remaining amount of stored power in the storage cell will fall below a first threshold and the control unit predicts that a power generation amount will fall below the demand in the future prescribed time period, the control unit turns the switch OFF. If the remaining amount of stored power in the storage cell falls below the first threshold but the control unit predicts that the power generation amount will exceed the demand in the future prescribed time period, the control unit turns the switch ON and supplies power from the storage cell to the load.

Description

Power supply control device

The present invention relates to a power supply control device that controls power supply from a distributed power source to a plurality of consumers.

2. Description of the Related Art Conventionally, a power supply system has been proposed in which a secondary battery is charged during energization of a commercial power supply and power is supplied from the secondary battery to a load when the commercial power supply is interrupted (for example, Document 1 [Japanese Published Patent Application 2010]. No. -259201].

In the power supply system of Document 1, a power failure compensation time corresponding to the priority is set for a plurality of power supply lines each connected to a load. When a power failure occurs, the secondary battery supplies power to each power supply line, and when the power failure compensation time set for each power supply line elapses from the time of the power failure, power is supplied from the secondary battery to the power supply line. Is to be stopped. In addition, power is supplied from the secondary battery to the power supply line with the highest priority until the remaining power of the secondary battery runs out.

In the power supply system of Document 1, the power supply from the secondary battery was cut off when a preset power failure compensation time had elapsed since the time of the power failure, except for the power supply line with the highest priority. Therefore, even when the secondary battery has a sufficient amount of stored electricity, power is supplied to the power supply line with low priority only for the preset power failure compensation time, and the power stored in the secondary battery (storage battery) There was a problem that could not be used effectively.

The present invention has been made in view of the above-described reasons, and an object thereof is to provide a power supply control device that can sufficiently use the power stored in the storage battery.

A power supply control device according to the present invention includes a switch connected between a distributed power source and a load that accumulates power generated by a power generation device in a storage battery and supplies the power stored in the storage battery to the outside, and the switch A control unit that controls on / off of the battery, a first measurement unit that measures the remaining amount of electricity stored in the storage battery, and a prediction unit that predicts the power generation amount of the power generation device and the demand amount of the load in a predetermined period in the future. If the prediction unit predicts that the remaining amount of electricity measured by the first measurement unit falls below a first threshold and the power generation amount falls below the demand amount in the predetermined period in the future, the control unit The prediction is configured that the switch is turned off, and the remaining amount of electricity measured by the first measurement unit is below the first threshold, and the power generation amount exceeds the demand amount in the predetermined period in the future. If the department predicts, The control unit is characterized in that it is configured to turn on the switch.

In this power supply control device, a plurality of the switches are provided for each usage of the load, and each of the plurality of switches is connected to the load for a corresponding usage, and the control unit includes a plurality of switches. It is also preferable that each of the switches is configured to be turned on or off separately.

In the power supply control device, the control unit is configured to set, for each usage, an on time period in which each of the plurality of switches is turned on and an off time period in which each of the plurality of switches is turned off. It is also preferred that

In the power supply control device, the control unit sets, for each of the plurality of switches, a second threshold value in which the remaining power amount measured by the first measurement unit is lower than the first threshold value even during the on-time period. It is also preferable to be configured to turn it off if it is below.

In the power supply control device, the control unit has a power storage remaining amount measured by the first measurement unit equal to or higher than a third threshold value that is higher than the first threshold value even in the off-time period for each of the plurality of switches. If present, it is also preferably configured to be turned on.

In the power supply control device, the control unit predicts that the power generation amount exceeds the demand amount in the predetermined period in the future even for each of the plurality of switches even in the off-time period. For example, it is also preferable to be configured to be turned on.

In this power supply control device, the control unit sets the priority of power supply for each of the plurality of switches according to usage, and gives priority to a switch having a higher priority among the plurality of switches. It is also preferable to be configured to be turned on.

In this power supply control device, the load is divided and connected to a plurality of branch circuits, and the switch is connected to each of the plurality of branch circuits, and the power consumption is individually measured for each of the plurality of branch circuits. And a control unit configured to control on / off of the switch for each of the plurality of branch circuits based on a measurement result of the second measurement unit. It is also preferable.

In the power supply control device, the control unit is configured to turn off the switch of the branch circuit in which the power consumption measured by the second measurement unit of the plurality of branch circuits exceeds a predetermined limit value. It is also preferable.

In this power supply control device, each of the plurality of switches and the corresponding load are connected to each other via a distribution line, and each of the plurality of distribution lines includes a neutral line and a voltage line. It is also preferable that the distribution line is configured to share the neutral line.

It is a figure which shows an example of the power distribution system using the electric power feeding control apparatus in embodiment. It is a figure explaining the load in the dwelling unit where electric power is supplied by an embodiment. FIG. 3A is a diagram showing a time change in the remaining amount of electricity stored in the storage battery, FIG. 3B is a diagram showing an on / off state of the switch, and FIG. 3C is a diagram showing a time change in the amount of solar radiation. It is a figure explaining operation | movement of embodiment. It is a figure explaining operation | movement of embodiment. It is a figure explaining operation | movement of embodiment. It is a figure showing an example of a power distribution system in an embodiment. It is a figure explaining operation | movement of embodiment. It is a figure explaining operation | movement of embodiment. It is a figure which shows the example of wiring of embodiment.

Embodiments of a power supply control device according to the present invention will be described with reference to the drawings.

The power supply control device of this embodiment is used in a power distribution system that supplies power from a distributed power source to a plurality of consumers. A power distribution system to which the power supply control device of the present embodiment is applied is installed in a non-electrified area such as a remote area or an island, and power generated by a distributed power source is supplied to a consumer (for example, a general dwelling unit) It is a relatively small system that is supplied to public facilities such as schools, hospitals, etc.

FIG. 1 is a diagram illustrating an example of a power distribution system. This power distribution system includes a power supply control device 1 that distributes power generated by a distributed power supply 10 (for example, AC 220V AC power) to dwelling units 20 of a plurality of consumers. I have. The power distribution destination of the power distribution system is not limited to the general dwelling unit 20 where individual consumers live, but may be a public facility such as a school facility or a hospital, or a business facility such as a factory or a store.

The distributed power source 10 includes a photovoltaic power generation (PV) 11, a DC / DC converter 12, a storage battery 13, and a DC / AC converter 14.

The solar power generation device 11 includes a plurality of solar battery panels that convert sunlight into electric energy, and the power generation capacity is determined according to the power demand of the supply destination.

The DC / DC converter 12 stabilizes the output of the solar power generator 11 and converts it into a substantially constant DC voltage (for example, DC 48 V), and charges the storage battery 13.

The storage battery 13 is made of, for example, a lead storage battery, and stores the electric power generated by the solar power generation device 11.

The DC / AC converter 14 converts the direct current voltage discharged from the storage battery 13 into alternating current (for example, AC 220 V) and outputs it to the power supply control device 1.

Here, if the power generation capacity of the solar power generation device 11 and the storage capacity of the storage battery 13 are prepared in a necessary and sufficient amount with respect to the scale of the load, a large amount of money is required for the introduction and operation of the power distribution system. Therefore, in this embodiment, the power generation capacity and the storage capacity are not prepared in an amount sufficient to satisfy the demand for the entire load, and when the power demand exceeds the power supply amount, the power supply to the entire load is stopped. there is a possibility. In addition, when the storage battery 13 is used in a state where the remaining amount of stored electricity is low, there is a possibility that deterioration will progress and the life will be shortened. Therefore, in this embodiment, the power supply control device 1 supplies power to the load based on the power generation amount of the solar power generation device 11, the remaining amount of power stored in the storage battery 13, and the power demand at the load. The operation is switched to a state where the power supply to is cut off, and this operation will be described later.

The power feeding control device 1 and the plurality of dwelling units 20 are connected via two sets of

distribution lines

31 and 32, respectively. Each dwelling unit 20 has a plurality of electric devices (loads), and is divided into two types according to usage. In the present embodiment, as shown in FIG. 2, the electric device used in the dwelling unit 20 is an electric device 21 of the first category indispensable for life such as a lighting fixture, and an entertainment such as a television or an audio device. Are classified into the second category of electrical equipment 22 that provides In each dwelling unit 20, the electric appliance 21 of the first category is connected to the distribution line 31. In addition, each dwelling unit 20 is provided with an outlet 23 connected to a distribution line 32, and an electric device 22 of the second category is connected to the outlet 23. The first category electrical device 21 may be detachably connected to an outlet (not shown) connected to the distribution line 31, and the second category electrical device 22 is directly connected to the distribution line 32. It may be done.

Here, the distribution line 31 to which the first category electrical device 21 is connected has a higher priority for power supply than the distribution line 32 to which the second category electrical device 22 is connected. Yes. The two sets of

distribution lines

31 and 32 each have a voltage line and a neutral line, and the

distribution lines

31 and 32 share the neutral line (see FIG. 10). Thereby, compared with the case where the

distribution lines

31 and 32 are each provided with a neutral wire, one wiring to each dwelling unit 20 can be decreased, and the cost of wiring can be reduced. In FIG. 10, a main breaker 9 (MCCB: Molded Case Circuit Breaker) is connected between the switches 2 A and 2 B and the distributed power supply 10.

The power supply control device 1 includes switches 2 A and 2 B, a measurement unit 3 (first measurement unit), a control unit 4, and a storage unit 5. The power supply control device 1 is configured by accommodating

switches

2A and 2B, a measurement unit 3, a control unit 4, and a storage unit 5 inside a box made of, for example, a 20-foot container. The power supply control device 1 is installed near the distributed power supply 10 and supplies power to the dwelling units 20 of a plurality of consumers via

distribution lines

31 and 32.

The distributed power source 10 is connected to the primary side of the switch 2A, and the distribution lines 31 from each dwelling unit 20 are connected in parallel to the secondary side of the switch 2A. The switch 2 A is switched on / off by the control unit 4. When the switch 2A is turned on, electric power is supplied from the distributed power source 10 to the first category electric device 21 via the distribution line 31, and when the switch 2A is turned off, the electric power source 21 of the first category from the distributed power source 10 is supplied. The power supply to is cut off.

The distributed power supply 10 is connected to the primary side of the switch 2B, and the distribution line 32 from each dwelling unit 20 is connected in parallel to the secondary side of the switch 2B. The switch 2 B is switched on / off by the control unit 4. When the switch 2B is turned on, power is supplied from the distributed power supply 10 to the second category electrical device 22 via the distribution line 32. When the switch 2B is turned off, the second category electrical device 22 is supplied from the distributed power supply 10. The power supply to is cut off.

The measuring unit 3 measures the power supplied from the DC / AC converter 14 to the load based on the current value measured by the current sensor 6A. The current sensor 6A is composed of, for example, a magnetoelectric conversion element using the Hall effect, and measures the output current of the DC / AC converter 14. In addition, since the output voltage of the storage battery 13 decreases in accordance with the decrease in the remaining amount of storage, the measuring unit 3 measures the output voltage of the storage battery 13 and estimates the remaining storage amount of the storage battery 13 from this output voltage.

The measuring unit 3 measures the output power of the DC / DC converter 12 based on the output current of the DC / DC converter 12 measured by the current sensor 6B, and the generated power of the solar power generation device 11 from this output power. Seeking. The current sensor 6B is composed of, for example, a magnetoelectric conversion element using the Hall effect, and measures the output current of the DC / DC converter 12.

The storage unit 5 includes an electrically rewritable nonvolatile memory such as an EEPROM (ElectricallyrErasable Programmable Read-Only Memory) or a RAM (Random Access Memory) provided with a backup power source. The storage unit 5 stores data such as the power demand at the load measured by the measurement unit 3, the remaining amount of power stored in the storage battery 13, and the generated power of the solar power generation device 11. The storage unit 5 is preset with a first threshold value W1, a second threshold value, and a third threshold value, which will be described later.

The control unit 4 individually controls on / off of the

switches

2A and 2B based on the measurement value of the measurement unit 3, the data stored in the storage unit 5, and the threshold value. The control unit 4 receives a predicted value of the amount of solar radiation during the day of the day from an operator of the power distribution system, and predicts the power generated by the photovoltaic power generator 11 based on the predicted value. To do. Further, the control unit 4 predicts a temporal change in the power demand in a future predetermined period (for example, 1 hour) based on the past power demand stored in the storage unit 5. That is, the control unit 4 has a function as a prediction unit that predicts the power generation amount of the solar power generation device 11 and the load demand amount in a future predetermined period.

Further, an input unit 7 is connected to the power supply control device 1. The input unit 7 is used by the operator of the power distribution system to set in the storage unit 5 an on-time zone in which power is supplied to the load and an off-time zone in which power supply to the load is cut off.

The power distribution system of the present embodiment has the above-described configuration, and the operation will be described below with reference to FIG. 3A shows the remaining amount of electricity stored in the storage battery 13, FIG. 3B shows on / off of the

switches

2A and 2B, and FIG. 3C shows the predicted value of the amount of solar radiation. The solid line L2 in FIG. 3A and FIG. 3B is based on only the result of comparing the power storage remaining amount of the storage battery 13 with the first threshold W1 without predicting the power generation amount and the power demand as in this embodiment. The operation when the

switches

2A and 2B are turned on or off is shown. On the other hand, a one-dot chain line L1 in FIGS. 3A and 3B indicates that the

switches

2A and 2B are turned on or off based on the power generation amount and the predicted value of the power demand when the remaining power of the storage battery 13 falls below the first threshold value W1. The operation | movement of this embodiment turned off is shown.

The control unit 4 compares the output voltage (battery voltage) of the storage battery 13 measured by the measurement unit 3 with the predetermined first threshold value W1. If the battery voltage is equal to or higher than the first threshold value W1 (before time t1), the control unit 4 turns on both the

switches

2A and 2B and feeds power from the distributed power supply 10 to the loads connected to the

distribution lines

31 and 32.

When the remaining amount of electricity stored in the storage battery 13 falls below the first threshold value W1 at time t1, the control unit 4 opens and closes based on the result of predicting the generated power of the solar power generation device 11 and the demand amount (power demand) at the load. The on / off of the

devices

2A and 2B is controlled. That is, the control unit 4 predicts the power generation amount of the solar power generation device 11 in the future predetermined period based on the predicted value of the solar radiation amount, and predicts the power demand in the future predetermined period based on the past power demand. To do. If it is predicted that the power generation amount exceeds the demand amount in the predetermined period, the control unit 4 determines that the remaining amount of power stored in the storage battery 13 recovers to the first threshold value W1 or more, turns on the

switches

2A and 2B, Let the power supply. In this case, since the power demand exceeds the amount of power generation from time t1 to time t2, the remaining amount of power stored in the storage battery 13 gradually decreases as shown by the one-dot chain line L1 in FIG. 3A, but power generation from time t2 to time t4. Since the amount exceeds the electric power demand, the remaining amount of electricity stored in the storage battery 13 gradually increases and becomes almost fully charged at time t4. Thereafter, the amount of power generation decreases as the amount of solar radiation decreases, and the power demand exceeds the amount of power generation. Therefore, the remaining amount of power stored in the storage battery 13 decreases after time t5. Since the battery is charged, there is no shortage of the remaining amount of electricity stored in the storage battery 13. Thus, even if the battery voltage falls below the first threshold value W1, if the control unit 4 can predict that the battery voltage of the storage battery 13 will recover based on the prediction of the amount of power generation and the power demand, the

switches

2A and 2B are switched on. Keep on.

By the way, when the power generation amount and the power demand are not predicted as in the present embodiment and the remaining amount of power stored in the storage battery 13 falls below the first threshold, the control unit 4 turns off the

switches

2A and 2B. As indicated by a solid line L2 in 3B, the

switches

2A and 2B are turned off from time t1 to time t3. On the other hand, in this embodiment, the

switches

2A and 2B are kept on as shown by the one-dot chain line L1 in FIG. 3B, and the on-time of the

switches

2A and 2B becomes longer. Can be used effectively. In addition, since the period during which the storage battery 13 is fully charged is shortened, the period during which the storage battery 13 has an empty capacity, that is, the period during which the power generated by the solar power generation device 11 can be charged is increased. It can be used effectively.

At time t1, the controller 4 turns off the

switches

2A and 2B when it is predicted that the power generation amount will fall below the power demand as a result of predicting the power generation amount and power demand in a predetermined period in the future. Thereby, the abnormal fall of the electrical storage residual amount of the storage battery 13 is suppressed, and deterioration of the storage battery 13 becomes difficult to advance.

By the way, in the power distribution system of this embodiment, although the distributed power supply 10 is provided with the solar power generation device 11, the electric power generated by the wind power generation device (not shown) is stored in the storage battery 13 and discharged from the storage battery 13. May be supplied to the load. Since the air volume and wind direction at a certain point are stabilized to some extent depending on the season and time, the control unit 4 determines future predetermined values based on past actual values stored in the storage unit 5 and surrounding weather information. The air volume in the period can be predicted, and the power generation amount of the wind turbine generator can be predicted from the air volume.

Further, the power generation device provided in the distributed power source 10 is not limited to a power generation device whose power generation amount fluctuates under natural conditions, such as the solar power generation device 11 and the wind power generation device. A simple diesel generator may be used. If the operator of the power distribution system sets the power generation capacity of the diesel generator smaller than the power demand of the load in order to reduce the introduction cost, the power demand may exceed the power generation amount. The amount of power generated by the diesel generator can be determined to a desired value by the operator of the power distribution system, but the power demand is expected to fluctuate depending on the time zone and the weather conditions of the day. Therefore, even when the power generation device is a diesel generator, the control unit 4 predicts power demand based on past results and weather conditions, and opens and closes based on the power generation amount and power demand in a predetermined period in the future. The on / off of the

devices

2A and 2B may be controlled.

Moreover, in the power distribution system of the present embodiment, the load of each dwelling unit 20 is connected to a separate distribution line for each usage, but the power supply method may be changed for each usage. The operation in that case will be described below.

In the power distribution system of the present embodiment, the first category of electrical equipment that is indispensable for daily life is connected to the power distribution line 31, and the second category of electrical equipment that provides entertainment is connected to the power distribution line 32. In the power supply control device 1, the distribution line 31 from each dwelling unit 20 is connected to the switch 2A, the distribution line 32 from each dwelling unit 20 is connected to the switch 2B, and the control unit 4 connects the

switches

2A and 2B. It can be turned on / off individually.

When the control unit 4 predicts that the remaining amount of power measured by the measurement unit 3 is less than the first threshold value W1 and the power generation amount falls below the demand amount in a future predetermined period, the control unit 4 turns off the switch 2B. Thus, the power supply to the distribution line 32 is cut off, but the switch 2A is turned on to continue the power supply to the distribution line 31. Thereby, since the power supply to the electric equipment of the second category is stopped, the power demand is suppressed, and the situation where the power supply to all the dwelling units is stopped due to power shortage hardly occurs. Moreover, the abnormal fall of the electrical storage residual amount of the storage battery 13 can be suppressed, and deterioration of the storage battery 13 becomes difficult to advance. Moreover, since electric power supply is continued to the electric appliance of the 1st category, the electric equipment indispensable for life, such as a lighting fixture, can operate | move continuously.

Here, the power supply control device 1 may set an on-time zone in which power is supplied to the electrical device and an off-time zone in which power supply to the electrical device is stopped for each usage of the electrical device. Since the time zone in which the electrical device is used is determined to some extent depending on the usage, the storage unit 5 is preset with an on-time zone and an off-time zone for each usage of the electrical device.

Fig. 4 shows an example of setting the on-time zone. In this setting example, for the electrical equipment of the first category, the on time zone D1 is set to the time zone from 10:00 to 12:00 and from 18:00 to 21:00, and the other time zones are set to the off time zone. Has been. For the electric appliances of the second category, the on time zone D2 is set to the time zone from 13:00 to 16:00, and the other time zones are set to the off time zone. The control unit 4 cuts off the power supply to the first category of electrical equipment and the power supply to the second category of electrical equipment during the off-time period set for each usage of the electrical equipment. Accordingly, since the electric device for the intended use is not used during the off time period set for each intended use, it is possible to suppress the wasteful consumption of power during the off time period, and to reduce the remaining amount of power stored in the storage battery 13. Can be secured.

Note that, in the power supply control device 1 of the present embodiment, even in the on-time period, when the remaining amount of power stored in the storage battery 13 falls below the first threshold value W1, the control unit 4 in the predetermined period in the future as described above. On / off control of the switches 2 A and 2 B is controlled based on the prediction result of the power generation amount and the power demand.

By the way, in the storage unit 5, an on-time zone and an off-time zone may be set in advance for each usage of the electric device, and the operator of the power distribution system can perform registration or change using the input unit 7. It may be. For example, when the on-time period D2 of the electrical device of the second category is set in the storage unit 5 from 13:00 to 16:00, since the power supply to the television is cut off after 16:00, from 15:00 on that day You cannot watch the second half of the program that is broadcast until 18:00. Here, if the operator of the power distribution system changes the on-time period D2 of the electrical equipment of the second category from 15:00 to 18:00 using the input unit 7 (see FIG. 5), the power supply to the television is up to 18:00. You can watch the program you want to watch until the end. As described above, if the operator of the power distribution system can change the setting of the on-time zone and the off-time zone using the input unit 7, the time zone in which the electric device can be used is changed on an occasional basis for each usage. It becomes possible.

As described above, the on-time zone and the off-time zone can be set for each use application of the electrical equipment, but the power supply control device 1 of the present embodiment is measured by the measurement unit 3 even in the on-time zone. It is preferable to turn off the switches 2 A and 2 B if the remaining amount of power storage is below the second threshold. The second threshold value is set to a value lower than the first threshold value W1.

If the remaining amount of electricity stored in the storage battery 13 continues to be used at a low level, the storage battery 13 will deteriorate. For example, as shown in FIG. 4, when the on-time zone D1 is set and the remaining charge of the storage battery 13 falls below the second threshold during the on-time zone D1, the control unit 4 turns off the switch 2A. In this way, power supply to the electrical equipment of the first category is cut off. Thereby, it can suppress that the electrical storage residual amount of the storage battery 13 falls below a 2nd threshold value, and can suppress degradation of the storage battery 13. FIG.

Further, in the power supply control device 1 according to the present embodiment, the control unit 4 turns on the corresponding switch if the remaining power amount measured by the measurement unit 3 is equal to or greater than the third threshold value even in the off-time period. Is also preferable. Thereby, the electric power accumulate | stored in the storage battery 13 can be utilized effectively, and the time which can use an electric equipment can be made longer. Note that the third threshold value is set to a value larger than the first threshold value W1 described above.

Even in the off-time period, it is also preferable to turn on the corresponding switch if the control unit 4 predicts that the power generation amount exceeds the demand amount in a predetermined period in the future. As a result, when it is expected that the remaining amount of electricity stored in the storage battery 13 will increase in a predetermined period in the future, the electric power stored in the storage battery 13 can be used effectively even during the off-time period, and the electric device can be used. Time can be made longer.

In addition, it is also preferable that the control unit 4 sets the priority of power supply for each of the plurality of

switches

2A and 2B according to the intended use, and turns on the switch with higher priority with priority.

For example, when it is predicted that the remaining amount of power stored in the storage battery 13 is lower than the first threshold value and the power generation amount is lower than the power demand in a predetermined period in the future, the control unit 4 switches to the electric device that is being fed in the on-time period. It is necessary to stop the power supply. If the remaining amount of electricity stored in the storage battery 13 is less than the first threshold value and the amount of power generation is predicted to be less than the power demand in a predetermined period in the future, if there are a plurality of types of electrical equipment in the on-time period, the control unit 4 Cuts off the power supply to the electric equipment for use with a low priority. For example, as shown in FIG. 6, the on-time period D1 of the electrical device in the first category is set from 12:00 to 15:00 and from 19:00 to 22:00, and the on-time period of the electrical device in the second category. Assume that D2 is set from 13:00 to 17:00. Here, at 14:00, when the remaining amount of electricity stored in the storage battery 13 falls below the first threshold, and the amount of power generation is expected to fall below the power demand in a future predetermined period (for example, 1 hour), the storage battery 13 is predicted not to be fully charged. The control unit 4 stops the power supply to the electric device for the intended use having a low priority. In the present embodiment, the second category electric device providing entertainment is set to have a lower priority than the first category electric device indispensable for daily life. The power supply to the category electrical devices is cut off, and power is continuously supplied to the first category electrical devices having a high priority.

Moreover, when the electrical storage remaining amount of the storage battery 13 is more than a 3rd threshold value, or when it is estimated that an electric power generation amount will exceed an electric power demand in a predetermined period in the future, the control part 4 will be the use use set to the off time slot | zone. Power may be supplied to the electrical equipment. Thereby, when there is a sufficient remaining amount of electricity stored in the storage battery 13, the power supply control device 1 supplies power also to the electrical device set in the off-time period, and therefore fully utilizes the remaining amount of electricity stored in the storage battery 13. And the time for operating the electric device can be lengthened.

In addition, if the remaining amount of electricity stored in the storage battery 13 is greater than or equal to the third threshold, or if it is predicted that the amount of power generation will exceed the power demand in a predetermined period in the future, if there are multiple types of electrical devices in the off-time period, It is also preferable that the control unit 4 supplies power to an electric device for use with a high priority. For example, as shown in FIG. 6, it is assumed that an on-time zone D1 of an electric device of the first category and an on-time zone D2 of the second category are set. The off-time zone of the first category electrical equipment is a time zone other than the on-time zone D1, and the off-time zone of the second category electrical equipment is a time zone other than the on-time zone D2. As described above, in a state where the off-time period is set, when the storage remaining amount of the storage battery 13 is greater than or equal to the third threshold at 10:00, or the power generation amount is predicted to exceed the power demand in a predetermined period in the future. The control unit 4 supplies power to the first category of electrical equipment having a higher priority. Thereby, when there is a sufficient amount of remaining power in the storage battery 13, the power supply control device 1 supplies power also to the first category of electrical equipment set in the off time zone. It can be fully utilized, and the time for operating the electrical equipment can be lengthened. In addition, the power supply control device 1 supplies power to an electric device for use that has been set to a higher priority, and prioritizes power supply to the electric device having a higher priority to operate the electric device having a higher priority. Can do.

Further, in the power distribution system of the present embodiment, as shown in FIG. 7, the electric device as a load is divided and connected to a plurality of branch circuits, and a switch 8 may be connected to each of the plurality of branch circuits. preferable. A distribution line 31 or a distribution line 32 is connected to each switch 8. The switch 8 connected to the distribution line 31 is connected to the first category of electrical equipment indispensable for daily life (for example, lighting fixtures of each dwelling unit 20, lighting fixtures 24 of common facilities, schools, etc.) via the distribution line 31. An electrical device of the public facility 25) is connected. The switch 8 connected to the distribution line 32 is connected via the distribution line 32 to a second category of electrical equipment (for example, a television set of each dwelling unit 20) that provides entertainment. The primary side of each switch 8 is connected to a current sensor 6C for detecting the current flowing through the branch circuit via the switch 8, and the measured value of each current sensor 6C is input to the measuring unit 3. Yes. The measuring unit 3 as the second measuring unit measures the power used by each branch circuit based on the current value of each branch circuit measured by the current sensor 6C. The measurement unit 3 measures the generated power of the solar power generation device 11 based on the output current of the DC / DC converter 12 measured by the current sensor 6B. The measuring unit 3 as the first measuring unit measures the remaining amount of electricity stored in the storage battery 13 based on the output voltage of the storage battery 13. The control unit 4 receives the power used by each branch circuit measured by the measurement unit 3 and controls on / off of the switch 8 for each branch circuit based on the power used by each branch circuit. It is configured as follows. It should be noted that the lighting equipment 24 of the common facility and the electrical equipment of the public facility 25 such as a school are classified into the first category of electrical equipment like the lighting equipment of each dwelling unit 20, and are set with high priority.

If the control unit 4 predicts that the remaining power storage amount measured by the measurement unit 3 is below the first threshold W1 and the power generation amount is below the demand amount in a predetermined period in the future, as in the above embodiment, the switch 8 is configured to be turned off. On the other hand, the control unit 4 turns on the switch 8 when it is predicted that the remaining amount of electricity measured by the measurement unit 3 is less than the first threshold value and the power generation amount exceeds the demand amount in a predetermined period in the future. It is configured. Furthermore, the control unit 4 turns on / off the switch 8 provided in each branch circuit based on the power used by each branch circuit measured by the measurement unit 3, and thus enables finer control. The control unit 4 can set the priority for each branch circuit, and may control the on / off of the switch 8 according to the priority.

Here, it is also preferable that the control unit 4 turns off the switch 8 connected to the branch circuit when the power consumption of a certain branch circuit measured by the measurement unit 3 exceeds a predetermined limit value.

In the power distribution area of the power distribution system according to the present embodiment, a lighting apparatus is assumed as the first category electric device having a high priority, and the limit value of the power used in the distribution line 31 to which the first category electric device is connected is. It is assumed that it is set to 200W. Since the distribution line 31 is fed with priority over the distribution line 32, a second category electrical device (such as a television) that provides entertainment is connected to the distribution line 31, and the second category electrical device can be used for as long as possible. It is conceivable that some users will try to do so.

As shown in FIG. 8, in a certain dwelling unit 20, a first category of electrical equipment 21 (for example, a lighting fixture) is connected to the distribution line 31, but the outlet 26 connected to the distribution line 31 belongs to the second category. An electric device 22 (for example, a television) is connected. The rated power consumption of the television is 150 W, and if a lighting fixture with a rated power consumption of 200 W and a television are used at the same time, the power consumption of this branch circuit is 350 W, which exceeds the limit value of 200 W.

The control unit 4 compares the power usage of the branch circuit measured by the measurement unit 3 with a predetermined upper limit value. If the power usage of the branch circuit exceeds the upper limit value, the control unit 4 determines that the power is excessively used. The switch 8 connected to this branch circuit is turned off, and the power used by each branch circuit can be suppressed to a limit value or less.

Further, as shown in FIG. 9, a distribution line 33 to another dwelling unit 27 is connected to a distribution line 31 to a certain dwelling unit 20, and the power supplied to the dwelling unit 20 is stolen and illegally used by the electric equipment of the dwelling unit 27. It can also be used.

In this case, when 150 W of power is consumed in each of the

dwelling units

20 and 27, the result of the measurement unit 3 measuring the power consumption of this branch circuit is 300 W, which exceeds the limit value of 200 W. Therefore, the control unit 4 determines that the power is abnormally used because the power consumption measured by the measurement unit 3 exceeds the upper limit value, and turns off the corresponding switch 8 to connect to this branch circuit. The power supply is cut off, and unauthorized use of power can be suppressed.

In this way, the power supply control device 1 can measure the power consumption of each branch circuit to cut off the power supply to the branch circuit that is using too much power or to the branch circuit that is being stolen, and use the power appropriately. Can be made.

As described above, the power supply control device of this embodiment includes the

switches

2A, 2B, 8, the control unit 4, the measurement unit 3 (first measurement unit), and the prediction unit. The

switches

2A, 2B, and 8 are disposed between the load and the distributed power source 10 that stores the power generated by the solar power generation device 11 (power generation device) in the storage battery 13 and supplies the power stored in the storage battery 13 to the outside. It is connected. The control unit 4 controls on / off of the

switches

2A, 2B, and 8. The measuring unit 3 measures the remaining amount of electricity stored in the storage battery 13. The control unit 4 as the prediction unit predicts the power generation amount of the solar power generation device 11 and the demand amount of the load in a predetermined period in the future. If the control unit 4 predicts that the remaining amount of electricity measured by the measurement unit 3 is less than the first threshold value and the power generation amount is below the demand amount in a predetermined period in the future, the control unit 4 switches the

switches

2A, 2B, 8 Configured to turn off. If the control unit 4 predicts that the remaining amount of electricity measured by the measurement unit 3 is less than the first threshold and the power generation amount exceeds the demand amount in a predetermined period in the future, the control unit 4 switches the

switches

2A, 2B, 8 Configured to turn on.

In this way, even when the remaining amount of power storage is below the first threshold, if the power generation amount is predicted to exceed the demand amount in a predetermined period in the future, it can be expected that the storage battery 13 will be charged with surplus power, By continuing the power supply from the storage battery 13, the time for supplying power to the load can be lengthened.

In this power supply control device, a plurality of

switches

2A and 2B are provided for each usage of the load, and the load for the corresponding usage is connected to each of the plurality of

switches

2A and 2B. Is preferably configured to turn on or off each of the plurality of

switches

2A and 2B separately. Thereby, since the electric power feeding to the said load can be individually set for every use application of the said load, fine control becomes possible.

In this power supply control device, the control unit 4 sets an on-time zone in which each of the plurality of

switches

2A, 2B is turned on and an off-time zone in which each of the plurality of

switches

2A, 2B is turned off for each usage. It is also preferable to be configured to do so. Since an on-time zone for supplying power to the load and an off-time zone for cutting off power supply to the load can be set for each usage, a time zone in which the load can be used can be set.

In this power supply control device, the control unit 4 has the remaining amount of power measured by the measuring unit 3 below the second threshold value lower than the first threshold value for each of the plurality of

switches

2A and 2B even during the on-time period. If so, it is also preferable to be configured to be turned off. When the remaining amount of electricity stored in the storage battery 13 is lower than the second threshold value, the deterioration of the storage battery 13 can be suppressed by cutting off the power supply to the load.

In this power supply control device, the control unit 4 has, for each of the plurality of

switches

2A and 2B, the remaining amount of electricity measured by the measuring unit 3 is equal to or higher than a third threshold value that is higher than the first threshold value even in the off time period. It is also preferred to be configured to turn on. If the remaining amount of electricity stored in the storage battery 13 is equal to or greater than the third threshold value, the power stored in the storage battery 13 can be used effectively by supplying power from the storage battery 13 to the load.

In this power supply control device, the control unit 4 predicts that the power generation amount exceeds the demand amount in a predetermined period in the future for each of the plurality of

switches

2A and 2B even in the off-time period. If so, it is also preferable to be configured to be turned on. Even if it is an off time zone, if it is predicted that the storage battery 13 will be charged in the future, the power stored in the storage battery 13 can be effectively used by supplying power from the storage battery 13 to the load.

In this power supply control device, the control unit 4 sets the priority of power supply for each of the plurality of

switches

2A and 2B according to the usage, and the priority is higher among the plurality of

switches

2A and 2B. It is also preferable that the switch is turned on with priority. Thereby, according to the priority set according to the intended use, it can be controlled whether electric power is supplied.

In this power supply control device, the load is divided and connected to a plurality of branch circuits, and a switch 8 is connected to each of the plurality of branch circuits, and second power for individually measuring the power used for each of the plurality of branch circuits. A measurement unit (measurement unit 3) is provided, and the control unit 4 is configured to control on / off of the switch 8 for each of a plurality of branch circuits based on the measurement result of the measurement unit 3. Is also preferable. Thereby, it is possible to control whether or not power is supplied in accordance with the used power measured for each branch circuit.

In this power supply control device, the control unit 4 may be configured to turn off the switch 8 of the branch circuit in which the power used by the measuring unit 3 among the plurality of branch circuits exceeds a predetermined limit value. preferable. Thereby, the power supply to the branch circuit where the power is used exceeding the limit value can be cut off.

In this power supply control device, the load corresponding to each of the plurality of switches 8 is connected via the

distribution lines

31 and 32, respectively, and the plurality of

distribution lines

31 and 32 are neutral lines and voltage lines. It is also preferable that each of the

distribution lines

31 and 32 is configured to share the neutral line. Since the plurality of

distribution lines

31 and 32 share the neutral line, the number of wirings can be reduced, and the wiring cost can be reduced.

While the invention has been described in terms of several preferred embodiments, various modifications and variations can be made by those skilled in the art without departing from the true spirit and scope of the invention, ie, the claims.

Claims

A switch connected between a distributed power source and a load that accumulates the electric power generated by the power generation device in a storage battery and supplies the electric power stored in the storage battery to the outside;
A control unit for controlling on / off of the switch;
A first measurement unit for measuring the remaining amount of electricity stored in the storage battery;
A prediction unit that predicts the power generation amount of the power generation device and the demand amount of the load in a predetermined period in the future,
If the prediction unit predicts that the remaining amount of electricity measured by the first measurement unit falls below a first threshold and the power generation amount falls below the demand amount in the predetermined period in the future, the control unit opens and closes the opening / closing Configured to turn off the vessel,
If the prediction unit predicts that the remaining amount of electricity measured by the first measurement unit is less than the first threshold and the power generation amount exceeds the demand amount in the predetermined period in the future, the control unit A power supply control device configured to turn on a switch.
A plurality of the switches are provided for each use of the load,
Each of the plurality of switches is connected to the load for a corresponding usage,
The power supply control device according to claim 1, wherein the control unit is configured to individually turn on or off each of the plurality of switches.
The control unit is configured to set an on time period for turning on each of the plurality of switches and an off time period for turning off each of the plurality of switches for each use. The power supply control device according to claim 2.
For each of the plurality of switches, the control unit turns off if the remaining amount of electricity measured by the first measurement unit is below a second threshold value that is lower than the first threshold value even during the on-time period. The power supply control device according to claim 3, wherein the power supply control device is configured to perform the control.
The control unit is configured to turn on each of the plurality of switches if the remaining power amount measured by the first measurement unit is equal to or higher than a third threshold value that is higher than the first threshold value even in the off-time period. The power supply control device according to claim 3, wherein the power supply control device is configured as follows.
The control unit turns on each of the plurality of switches if the prediction unit predicts that the power generation amount exceeds the demand amount in the predetermined period in the future even in the off-time period. The power supply control device according to claim 3, wherein the power supply control device is configured.
The control unit sets a priority of power supply for each of the plurality of switches according to usage, and preferentially turns on a switch having a higher priority among the plurality of switches. The power supply control device according to claim 3, wherein the power supply control device is configured.
The load is divided and connected to a plurality of branch circuits,
The switch is connected to each of the plurality of branch circuits,
A second measuring unit for individually measuring power used for each of the plurality of branch circuits is provided;
The said control part is comprised so that ON / OFF of the said switch may be controlled about each of these branch circuits based on the measurement result of a said 2nd measurement part. Power supply control device.
The control unit is configured to turn off the switch of the branch circuit in which the power used by the second measurement unit of the plurality of branch circuits exceeds a predetermined limit value. The power supply control device according to claim 8.
The load corresponding to each of the plurality of switches is connected via a distribution line,
The power supply control device according to claim 3, wherein the plurality of distribution lines are each provided with a neutral line and a voltage line, and the plurality of distribution lines share the neutral line.