JP2018057231A - Power supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply system which can obtain profits more efficiently by combining plural methods for controlling storage batteries.SOLUTION: The controller can execute at least two of first to sixth controls, the first control being for suppressing voltage changes, the second control being for suppressing the demand values of all of a plurality of users, the third control being for suppressing the demand value of one of the users, the fourth control being for performing a time shift for one of the users, the fifth control being for performing a time shift for all the users, and the sixth control being for suppressing the difference between the power load and the obtained electric power of all the users. The controller sets priorities of executable controls and executes a control accordingly.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a technology of a power supply system having a storage battery.

  Conventionally, the technique of the electric power supply system which has a storage battery is well-known. For example, as described in Patent Document 1. Patent Document 1 describes a technique for suppressing an electricity bill by performing control for charging a storage battery (power storage device) with midnight power.

  In addition to the technology described in Patent Document 1, for example, when the required power from the power load is large, the storage battery is discharged, and the power from the storage battery is supplied to the power load, so that the demand value (maximum demand power) It is also possible to suppress electricity charges.

  As described above, a plurality of storage battery control methods by which consumers can obtain various benefits are known. However, a technique for effectively combining these plural control methods has not been known.

JP2012-130149A

  The present invention has been made in view of the situation as described above, and the problem to be solved is an electric power supply system that can more effectively obtain a profit by combining a plurality of storage battery control methods. Is to provide.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, in Claim 1, each of the plurality of consumers has a storage battery that can supply power to the power load of the plurality of consumers, and a control device that can control the operation of the storage battery. It is an electric power supply system, Comprising: The said control apparatus controls the said storage battery in order to suppress the demand value of the said several consumer whole with 1st control which controls charging / discharging of the said storage battery in order to suppress voltage fluctuation | variation. In a time zone in which the second control to be discharged, the third control to discharge the storage battery of the consumer in order to suppress the demand value of one of the consumers, and the power rate is relatively expensive The storage battery of the consumer is discharged according to the power load of the consumer among the consumers, and the storage battery is charged with power from a commercial power source in a time zone where the power rate is relatively inexpensive. In the fourth control and a time zone in which the power rate is relatively expensive, the commercial battery is discharged in the time zone in which the storage battery is discharged according to the power load of the plurality of consumers and the power rate is relatively inexpensive. And a sixth control for controlling charging / discharging of the storage battery in order to suppress a difference between the power load and the procurement power of the plurality of consumers as a whole. Of these, at least two or more controls can be executed, priorities are assigned to the executable controls, and the control selected according to the priorities is executed.

  In the present invention, the first control and the second control have higher priority than the third control, the fourth control, the fifth control, and the sixth control. Is set to

  In the present invention, the fifth control and the sixth control have lower priority than the first control, the second control, the third control, and the fourth control. Is set to

  According to a fourth aspect of the present invention, when executing the first control and the second control, the control device causes the storage battery to discharge regardless of the charge rate of the storage battery.

  In claim 5, when the control device executes the third control, the fourth control, the fifth control, and the sixth control, the storage device has a charging rate equal to or higher than a predetermined threshold value. Only discharge.

  In the present invention, the predetermined threshold value is set to be smaller as the priority is higher among the third control, the fourth control, the fifth control, and the sixth control. Is set.

  As effects of the present invention, the following effects can be obtained.

  In claim 1, a plurality of storage battery control methods can be combined to obtain more effective benefits.

  According to the second aspect of the present invention, it is possible to preferentially execute control that is considered to be highly important.

  According to the third aspect of the present invention, it is possible to prioritize control other than control that is considered to be less important.

  According to the fourth aspect of the present invention, the control that is considered to be highly important can be executed regardless of the charging rate of the storage battery.

  In claim 5, the control considered to be low in importance can be executed while ensuring a certain amount of charge in the storage battery.

  In Claim 6, control can be performed more appropriately.

Schematic of a power supply system and a condominium to which the power supply system is applied. The block diagram which showed the structure regarding control of an electric power supply system. The flowchart which showed the control (1st control and 2nd control) by a control apparatus. The flowchart which showed the control (3rd control and 4th control) by a control apparatus. The flowchart which showed the control (5th control and 6th control) by a control apparatus.

  Below, the electric power supply system 10 which concerns on one Embodiment of this invention is demonstrated.

  First, the outline of the apartment 1 to which the power supply system 10 is applied will be described with reference to FIG.

  The apartment 1 according to the present embodiment has a plurality of dwelling units 2. FIG. 1 shows five dwelling units 2 as an example. Apart from the dwelling unit 2, the apartment 1 has a storage battery chamber 3 for storing a storage battery 30 to be described later.

  The apartment 1 according to the present embodiment assumes that energy management is performed by a predetermined business operator (aggregator). That is, the aggregator performs high-voltage collective power reception and performs collective energy management by supplying the electric power to each dwelling unit 2 (customer).

  Next, the configuration of the power supply system 10 will be described with reference to FIGS. 1 and 2.

  The power supply system 10 appropriately supplies power to each dwelling unit 2 of the apartment 1. The power supply system 10 mainly includes a load device 20, a storage battery 30, a transformer 40, a first sensor 50, a second sensor 60, a third sensor 70, and a control device 80.

  The load device 20 is provided in each dwelling unit 2 and is various electric products (power loads) that consume power.

  The storage battery 30 can charge and discharge electric power. A plurality of storage batteries 30 are provided, and one resident of each dwelling unit 2 owns one. The plurality of storage batteries 30 are accommodated in the storage battery room 3 of the apartment 1.

  The transformer 40 appropriately transforms the voltage from the commercial power source S of the power company. The transformer 40 is disposed in an appropriate space of the apartment 1 (for example, a transformation room for accommodating the transformer 40).

  The transformer 40 is connected to the commercial power source S by a distribution line. Moreover, the transformer 40 is each connected with the load apparatus 20 of each dwelling unit 2 by a distribution line. Moreover, each storage battery 30 is connected on the primary side (commercial power supply S side) of the distribution line which supplies electric power to each dwelling unit 2. By arranging the storage battery 30 in this way, charge / discharge power of the storage battery 30 can be accommodated in the entire apartment 1 (each dwelling unit 2).

  In the present embodiment, basically, the power (discharge amount) discharged from each storage battery 30 is controlled so as not to exceed the power load (power demand) of the consumer (unit 2) that owns the storage battery 30. Is done. Thus, by suppressing the discharge amount of each storage battery 30 according to the electric power load of each dwelling unit 2, the bias of the discharged storage battery 30 is eliminated, and the occurrence of a difference in the life of the storage battery 30 is suppressed. Can do. As a result, it is possible to eliminate unfairness among consumers while accommodating power throughout the entire apartment 1.

  The first sensor 50 can detect electric power. The first sensor 50 is provided on the commercial power supply S side of the transformer 40. The electric power procured by the aggregator can be detected by the first sensor 50 provided at the location.

  The second sensor 60 can detect voltage and power. The second sensor 60 is provided on the load device 20 (storage battery 30) side of the transformer 40. The voltage at the end of the transformer 40 (transformer room) can be detected by the second sensor 60 provided at the location. The second sensor 60 can detect the power load of the entire apartment.

  The third sensor 70 can detect electric power. The third sensor 70 is provided on each distribution line that draws electric power to the load device 20 of each dwelling unit 2. The power load of each dwelling unit 2 can be detected by the third sensor 70 provided at the location.

  A control device 80 shown in FIG. 2 controls each part of the power supply system 10. The control device 80 is mainly configured by an arithmetic processing device such as a CPU, a storage device such as a RAM and a ROM, and the like. Various information, programs, and the like for controlling the operation of the power supply system 10 are stored in the control device 80 in advance.

  The control device 80 is connected to the first sensor 50, the second sensor 60, and the third sensor 70, and can receive a detection result by the first sensor 50 or the like.

  The control device 80 is connected to the storage battery 30 and can control charging / discharging of each storage battery 30. Moreover, the control apparatus 80 can acquire various information (SOC (charge rate) etc.) regarding the storage battery 30.

  Below, the content of the control performed by the control apparatus 80 is demonstrated.

  The control device 80 can mainly execute six controls (from the first control to the sixth control) regarding the storage battery 30. Below, the outline | summary of each of the said 6 control is demonstrated first.

  First, the first control will be described. The first control is control for suppressing voltage fluctuation. If the voltage fluctuates significantly in the apartment 1 and deviates from the reference value (101 ± 6 (V)), it may cause flickering of the lighting, malfunction of precision equipment (such as a personal computer), power failure, or the like. Such voltage fluctuation can occur, for example, when a sudden fluctuation in power demand (use of a dryer or IH, etc.) occurs in a specific dwelling unit 2 (customer), or when a power demand that is greater than expected occurs.

  On the other hand, in the first control, voltage fluctuation can be suppressed by controlling charging / discharging of the storage battery 30. That is, with respect to fluctuations in power demand, the fluctuations are mitigated by charging and discharging the storage battery 30. Moreover, with respect to the electric power demand more than assumption, the electric power load is reduced because the storage battery 30 discharges.

  Specifically, the control device 80 issues a charge / discharge instruction to all the storage batteries 30 in accordance with the voltage detected by the second sensor 60. For example, when the voltage detected by the second sensor 60 is less than 96 (V), the control device 80 causes the all storage battery 30 to discharge. Moreover, the control apparatus 80 makes the all storage battery 30 charge, when the voltage detected by the 2nd sensor 60 is 106 (V) or more. As a result, voltage fluctuation can be suppressed so that the voltage does not deviate from the reference value (101 ± 6 (V)).

  Next, the second control will be described. The second control is control for suppressing the demand value (maximum demand power) of the entire apartment 1. When the power demand of each dwelling unit 2 increases, the demand value that is the power load of the entire apartment 1 may rise temporarily. When the aggregator performs high-voltage collective power reception as in this embodiment, the basic usage amount of the electricity bill is determined based on the demand value of the entire apartment 1. For this reason, when the demand value increases, the power rate of the aggregator soars, and as a result, the power rate unit price of each dwelling unit 2 also increases.

  On the other hand, in 2nd control, by discharging from the storage battery 30, the demand value of the whole apartment 1 can be suppressed, and the reduction | decrease (prevention of soaring) of an electric power charge can be aimed at.

  Specifically, the control device 80 issues a discharge instruction to all the storage batteries 30 according to the power detected by the second sensor 60 (the power load of the entire apartment 1). For example, the control device 80 causes the entire storage battery 30 to discharge when the power load of the entire apartment 1 becomes 50 kW or more. Thereby, the demand value can be suppressed.

  Next, the third control will be described. The third control is a control for suppressing the demand value of each dwelling unit 2. When the power demand of each dwelling unit 2 increases and the demand value of each dwelling unit 2 increases, the power rate of each dwelling unit 2 increases.

  On the other hand, in 3rd control, by discharging from the storage battery 30 which each said dwelling unit 2 owns, the demand value of each said dwelling unit 2 can be suppressed and reduction of an electric power charge can be aimed at.

  Specifically, the control device 80 issues a discharge instruction to the storage battery 30 of each corresponding dwelling unit 2 according to the power detected by the third sensor 70 (the power load of each dwelling unit 2). For example, the control apparatus 80 makes the storage battery 30 which the said dwelling unit 2 owns discharge when the electric power load of a certain dwelling unit 2 becomes 5 kW or more. Thereby, the demand value can be suppressed.

  Next, the fourth control will be described. The fourth control is a control for performing a time shift of each dwelling unit 2. If the electric power load becomes large in the time zone (daytime etc.) where the electric power unit price is high in each dwelling unit 2, the electric fee will increase accordingly.

  On the other hand, in the fourth control, the storage battery 30 is charged during a time period when the power rate unit price is relatively inexpensive (cheap), and discharged from the storage battery 30 during a time period when the power rate unit price is relatively expensive (expensive). By doing so, it is possible to reduce electricity charges.

  Specifically, the control device 80 issues a charge / discharge instruction to each storage battery 30 according to the time period. For example, the control device 80 causes the storage battery 30 to be charged in the late-night time zone when the power rate unit price is cheap. In addition, the control device 80 controls the storage battery 30 according to the power load (the power detected by the third sensor 70) of each dwelling unit 2 in the time zone (especially the peak time zone when the power load is large) where the power unit price is high. Discharge. As a result, the electricity bill can be reduced.

  Next, the fifth control will be described. The fifth control is a control for performing a time shift of the entire apartment 1. If the power load increases during the time period when the unit price of the entire apartment 1 is high, the electricity rate will increase accordingly.

  On the other hand, in the fifth control, the storage battery 30 is charged during a time period when the power rate unit price is relatively inexpensive (cheap), and discharged from the storage battery 30 during a time period when the power rate unit price is relatively expensive (expensive). By doing so, it is possible to reduce electricity charges.

  Specifically, the control device 80 issues a charge / discharge instruction to each storage battery 30 according to the time period. For example, the control device 80 causes the storage battery 30 to be charged in the late-night time zone when the power rate unit price is cheap. In addition, the control device 80 applies power to the storage battery 30 in accordance with the power load of the entire apartment 1 (power detected by the second sensor 60) during a time period when the power unit price is high (particularly during a peak time period when the power load is large). Discharge. As a result, the electricity bill can be reduced.

  Although the fourth control and the fifth control are both related to time shift, the time zone of the unit price of each unit 2 and the time unit of the unit price of the entire apartment 1 may be different. Therefore, separate control (fourth control and fifth control) is performed.

  Next, the sixth control will be described. The sixth control is a control for adjusting the imbalance of the entire apartment 1 (an imbalance between the power load and the procurement power). If there is a large difference (imbalance) between the power load of the entire apartment 1 and the procured power, the aggregator must pay an imbalance fee (in-variable (outside) power generation fee), and the rate of return deteriorates. In addition, the deterioration of the profit rate is reflected in the unit price of each unit 2, that is, the unit price of the power rate may be raised.

  On the other hand, in the sixth control, when the imbalance occurs, the imbalance can be reduced by charging / discharging the storage battery 30.

  Specifically, the control device 80 issues a charge / discharge instruction to the storage battery 30 of each dwelling unit 2 according to the electric power detected by the first sensor 50 and the second sensor 60. For example, the control device 80 causes each storage battery 30 to discharge when the power load of the entire apartment 1 (power detected by the second sensor 60) is larger than the power detected by the first sensor 50 (procurement power). Moreover, the control apparatus 80 makes each storage battery 30 charge, when the electric power load of the whole apartment 1 is smaller than the procurement electric power. As a result, imbalance can be mitigated.

  Priorities are assigned to the above six controls, and the control device 80 preferentially executes the control with higher priority. In this embodiment, the priority is set higher in the order of the first control, the second control, the third control, the fourth control, the fifth control, and the sixth control.

  Here, since the voltage fluctuation can cause malfunction of the device or power failure, the importance of the first control is relatively high. Moreover, since the increase in the demand value of the whole apartment 1 leads to the increase in the electricity charge of the aggregator (and consequently the electricity charge of each dwelling unit 2), the importance of the second control is relatively high. Therefore, in this embodiment, the priority of the first control and the second control is set high.

  On the other hand, since the time shift of the whole apartment 1 can be replaced to some extent by the time shift (fourth control) of each dwelling unit 2, the importance of the fifth control is relatively low. Moreover, since it is thought that the necessity for the imbalance adjustment of the whole apartment 1 is low, the importance of the sixth control is relatively low. Therefore, in the present embodiment, the priority of the fifth control and the sixth control is set low.

  Below, the specific method (control method) which performs said 6 control based on the said priority is demonstrated.

  As shown in FIG. 3, the control device 80 first executes the first control (from step S101 to step S103).

Specifically, in step S <b> 101, the control device 80 determines the value of the voltage (received voltage) detected by the second sensor 60.
When the received power voltage is less than 97 (V), the control device 80 proceeds to step S102.
Moreover, the control apparatus 80 transfers to step S103, when the said receiving voltage is 106 (V) or more.
Moreover, the said control apparatus 80 transfers to step S201 (2nd control), when the said receiving voltage is 97 (V) or more and less than 106V.
It should be noted that the values of 97 (V) and 106 (V), which are the determination criteria, are values set with a slight margin with respect to the reference value (101 ± 6 (V)).

  In step S <b> 102, control device 80 discharges all storage battery 30. As a result, it is possible to increase the received voltage and prevent the voltage from deviating from the reference value (101 ± 6 (V)). In this case, the control device 80 performs control so that the same amount of power is discharged from all the storage batteries 30 so that the discharge amount is not biased.

  As described above, in the present embodiment, basically, the discharge amount of each storage battery 30 is controlled (restricted) so as not to exceed the power load of the consumer (unit 2) that owns the storage battery 30. However, in step S102, the restriction is removed, and discharge is possible even in a range exceeding the power load. This is because the importance of the first control (suppression of voltage fluctuation) is high. However, the discharge amount of the entire storage battery 30 is limited to a range that does not exceed the power demand of the entire apartment 1.

  In step S <b> 103, the control device 80 charges all the storage batteries 30. As a result, the received voltage can be reduced, and the voltage can be prevented from deviating from the reference value (101 ± 6 (V)).

  Next, the control apparatus 80 performs 2nd control (step S201 and step S202).

Specifically, in step S201 transferred from step S101, the control device 80 determines the value of the power (the power demand (demand) of the entire apartment 1) detected by the second sensor 60.
When the power demand (power load) of the entire apartment 1 is 90% or more of the set demand value, the control device 80 proceeds to step S202.
Moreover, the control apparatus 80 transfers to step S301 (3rd control), when the electric power demand (electric power load) of the whole apartment 1 is less than 90% of the set demand value.

  In step S202, control device 80 discharges all storage batteries 30. Thereby, the rise in the demand value of the whole apartment 1 can be suppressed. In this case, the control device 80 performs control so that the same amount of power is discharged from all the storage batteries 30 so that the discharge amount is not biased. The control device 80 controls the discharge amount from all the storage batteries 30 to be 10% of the set demand value (for example, 5 (kW) if the demand value is 50 (kW)).

  In step S202, as in the first control (step S102), the discharge amount of each storage battery 30 is not limited. This is because the importance of the second control (demand value suppression) is high. In step S202, as in the first control (step S102), the discharge amount of the entire storage battery 30 is limited to a range that does not exceed the power demand of the entire apartment 1.

  Next, the control device 80 executes the third control (from step S301 to step S303) shown in FIG. The third control is executed for each dwelling unit 2 (for each storage battery 30 owned by each dwelling unit 2).

Specifically, in step S301 transferred from step S201, the control device 80 determines the value of power detected by the third sensor 70 (power demand (demand) of the dwelling unit 2).
The control apparatus 80 transfers to step S302, when the electric power demand (electric power load) of the dwelling unit 2 is 90% or more of the set demand value.
Moreover, the control apparatus 80 transfers to step S401 (4th control), when the electric power demand (electric power load) of the dwelling unit 2 is less than 90% of the set demand value.

In step S <b> 302, the control device 80 determines the SOC (charging rate) value of the storage battery 30 owned by the dwelling unit 2.
When the SOC of storage battery 30 is 30% or more, control device 80 proceeds to step S303.
Moreover, the control apparatus 80 transfers to step S401 (4th control), when SOC of the storage battery 30 is less than 30%.

  In step S <b> 303, the control device 80 discharges the storage battery 30. Thereby, an increase in the demand value of the dwelling unit 2 can be suppressed. In this case, the control device 80 controls the discharge amount from the storage battery 30 to be 10% of the set demand value.

  In this way, the control device 80 executes the third control for each dwelling unit 2. At this time, by discharging only when the SOC of the storage battery 30 is 30% or more, a minimum (30% or more) electric power is secured in the storage battery 30 to prepare for an emergency (such as when a power failure occurs). it can.

  Next, the control device 80 executes the fourth control (from step S401 to step S405). The fourth control is executed for each dwelling unit 2 (for each storage battery 30 owned by each dwelling unit 2).

Specifically, in step S401 transferred from step S301 or step S302, the control device 80 determines the power rate unit price of the dwelling unit 2 at the current time. In addition, in order to perform the said determination, the control apparatus 80 has acquired the power rate table (data which shows the power rate unit price for every time slot | zone) of the dwelling unit 2 previously.
If the unit price of the power charge of the dwelling unit 2 is relatively low (for example, it is a time zone in which midnight power is applied), the control device 80 proceeds to step S402.
In addition, when the power rate unit price of the dwelling unit 2 is relatively expensive (for example, when the power rate unit price is set to be the most expensive in the day), the control device 80 proceeds to step S404. .
Moreover, the control apparatus 80 transfers to step S501 (5th control), when the electric power rate unit price of the dwelling unit 2 is neither cheap nor expensive.

  In step S <b> 402, the control device 80 determines whether the charging priority is high or low among the storage batteries 30 (the storage battery 30 of the dwelling unit 2 for which the unit price of power charge is determined to be low). Here, it is assumed that the control device 80 has a higher charge priority in the order from the lowest SOC among the storage batteries 30.

  After performing the process of step S402, the control device 80 proceeds to step S403.

  In step S <b> 403, the control device 80 charges each storage battery 30. At this time, the control device 80 performs charging in order (in order) from the storage battery 30 having a higher charging priority in step S402.

  As described above, if all the storage batteries 30 are charged at the same time, inconvenience may occur (for example, voltage fluctuation or increase in the demand value of the entire apartment 1 may occur). The storage battery 30 is charged according to the priority order.

On the other hand, in step S404 transferred from step S401, the control device 80 determines the SOC value of the storage battery 30 (the storage battery 30 of the dwelling unit 2 that is determined to have a high power unit price).
The control apparatus 80 transfers to step S405, when SOC of the storage battery 30 is 40% or more.
Moreover, the control apparatus 80 transfers to step S501 (5th control), when SOC of the storage battery 30 is less than 40%.

  In step S405, the control device 80 discharges the storage battery 30. By supplying the electric power from the storage battery 30 to each dwelling unit 2, it is possible to reduce the power charge. In addition, the discharge amount of the storage battery 30 at this time is controlled so as not to exceed the power demand (power load) of the dwelling unit 2 that owns the storage battery 30.

  As described above, the control device 80 performs the fourth control for each dwelling unit 2. At this time, by discharging only when the SOC of the storage battery 30 is 40% or more, a certain amount (40% or more) of electric power can be secured in the storage battery 30 to prepare for an emergency (such as when a power failure occurs). . Since the fourth control has a lower priority (importance) than the third control, the threshold (40% (see step S404)) for discharging the storage battery 30 in the fourth control is the third control. Is set to be higher than a threshold value (30% (see step S303)) for discharging the storage battery 30 in this control. That is, in the fourth control having a relatively low importance level, the storage battery 30 is set to be less likely to discharge than in the third control having a relatively high importance level.

  Next, the control device 80 executes the fifth control (from step S501 to step S503) shown in FIG. Note that the fifth control (particularly, the processing in step S502 and step S503 described later) is executed for each dwelling unit 2 (for each storage battery 30 owned by each dwelling unit 2).

In step S501 transferred from step S401 or step S404, the control device 80 determines the power rate unit price of the entire apartment 1 (that is, the aggregator) at the current time. In order to make the determination, the control device 80 acquires in advance an aggregator power charge table (data indicating a power charge unit price for each time zone).
When the power rate unit price of the entire apartment 1 is relatively expensive (for example, when the power rate unit price is set to be the most expensive in the day), the control device 80 proceeds to step S502.
Moreover, the control apparatus 80 transfers to step S601 (6th control), when the electric power unit price of the dwelling unit 2 is not expensive.

In step S <b> 502, control device 80 determines the SOC value of storage battery 30 (storage battery 30 of dwelling unit 2 that is determined to have a high power unit price).
When the SOC of storage battery 30 is 80% or more, control device 80 proceeds to step S503.
Moreover, the control apparatus 80 transfers to step S601 (6th control), when SOC of the storage battery 30 is less than 80%.

  In step S503, the control device 80 discharges the storage battery 30. By supplying the electric power from the storage battery 30 to each dwelling unit 2, it is possible to reduce the power charge. Note that the total discharge amount of the storage battery 30 at this time is controlled so as not to exceed the power demand (power load) of the entire apartment 1.

  As described above, the control device 80 executes the fifth control (step S502 and step S503) for each dwelling unit 2. At this time, by discharging only when the SOC of the storage battery 30 is 80% or more, a certain amount (80% or more) of electric power can be secured in the storage battery 30 to prepare for an emergency (such as when a power failure occurs). . Further, since the fifth control has a lower priority (importance) than the fourth control, the threshold (80% (see step S502)) for discharging the storage battery 30 in the fifth control is the fourth control. Is set to be higher than a threshold value (40% (see step S404)) for discharging the storage battery 30 in the control. That is, in the fifth control having a relatively low importance level, the storage battery 30 is set to be less likely to discharge than in the fourth control having a relatively high importance level.

  Note that the fifth control does not include the process of charging the storage battery 30 (omitted). This is because the fourth control (step S403) includes a process of charging the storage battery 30, and thus it is considered that the necessity for charging again in the fifth control is low. That is, in the present embodiment, the process of charging the storage battery 30 in the fifth control is included in the process of charging the storage battery 30 in the fourth control (shared). If the priority of the fifth control is higher than that of the fourth control, the process of charging the storage battery 30 in the fifth control is executed, and the process of charging the storage battery 30 in the fourth control is omitted. It is also possible to do.

  Next, the control device 80 executes sixth control (from step S601 to step S604). Note that the sixth control (particularly, processing from step S602 to step S604 described later) is executed for each dwelling unit 2 (for each storage battery 30 owned by each dwelling unit 2).

In step S601 transferred from step S501 or step S502, the control device 80 determines the degree of imbalance (an imbalance between power load and procurement power) of the entire apartment 1. Specifically, the control device 80 determines the degree of imbalance based on the ratio (supply / demand × 100 (%)) of supply (procurement power) and demand (power load) of the entire apartment 1. .
The control apparatus 80 transfers to step S602, when the ratio of the electric power supply and demand of the whole apartment 1 is 102% or more.
Moreover, the control apparatus 80 transfers to step S603, when the ratio of the electric power supply and demand of the whole apartment 1 is less than 98%.
Moreover, the control apparatus 80 complete | finishes this control, when the ratio of the electric power supply and demand of the whole apartment 1 is less than 102% and 98% or more.

  When the aggregator performs energy management for a plurality of apartments as well as the apartment 1, in the process of step S601, the degree of imbalance of all the apartments managed by the aggregator is determined. May be.

  In step S602, the control device 80 charges each storage battery 30. At this time, the control device 80 charges only the rechargeable storage battery 30 (for example, only the storage battery 30 having sufficient free capacity). Further, the amount of charge at this time is controlled so as to be the difference between the power supply and demand of the entire apartment 1.

  Thus, when the ratio of the power supply and demand of the entire apartment 1 is 102% or more, the storage battery 30 can be charged to eliminate the difference between the supply and demand. Thereby, the imbalance of the whole apartment 1 can be eased.

On the other hand, in step S603 transferred from step S601, the control device 80 determines the SOC value of each storage battery 30.
When the SOC of storage battery 30 is 90% or more, control device 80 proceeds to step S604.
Moreover, the control apparatus 80 complete | finishes this control, when SOC of the storage battery 30 is less than 90%.

  In step S604, the control device 80 discharges each storage battery 30. At this time, control device 80 discharges only storage battery 30 (see step S603) having an SOC of 90% or more. The amount of discharge at this time is controlled to be the difference between the power supply and demand of the entire apartment 1.

  Thus, when the ratio of the power supply and demand of the entire apartment 1 is less than 98%, the storage battery 30 can be discharged to eliminate the difference between the supply and demand. Thereby, the imbalance of the whole apartment 1 can be eased.

  As described above, the control device 80 executes the sixth control (from step S602 to step S604) for each dwelling unit 2. At this time, by discharging only when the SOC of the storage battery 30 is 90% or more, a certain amount (90% or more) of electric power can be secured in the storage battery 30 to prepare for an emergency (such as when a power failure occurs). . Further, since the sixth control has a lower priority (importance) than the fifth control, the threshold value (90% (see step S603)) for discharging the storage battery 30 in the sixth control is the fifth control. Is set to be higher than a threshold value (80% (see step S502)) for discharging the storage battery 30 in this control. That is, in the sixth control having a relatively low importance level, the storage battery 30 is set to be less likely to discharge than in the fifth control having a relatively high importance level.

  The control device 80 repeats the above processing (from the first control to the sixth control shown in FIGS. 3 to 5) every predetermined time (for example, every few seconds). At this time, the control device 80 executes the above six controls (from the first control to the sixth control) according to the priority order. As described above, in the present embodiment, a plurality of types of functions (from the first control to the sixth control) by the storage battery 30 can be appropriately prioritized and appropriately executed accordingly.

As described above, the power supply system 10 according to the present embodiment is
A plurality of consumers (units 2) each have a storage battery 30 capable of supplying power to the plurality of consumers' power loads (load equipment 20);
A control device 80 capable of controlling the operation of the storage battery 30;
A power supply system 10 comprising:
The control device 80 includes:
A first control for controlling charging / discharging of the storage battery 30 in order to suppress voltage fluctuation;
A second control for discharging the storage battery 30 to suppress the demand value of the plurality of consumers as a whole;
Third control for discharging the storage battery 30 of the consumer in order to suppress the demand value of one of the consumers,
In the time zone when the power rate is relatively high, the storage battery 30 of the consumer is discharged according to the power load of one of the consumers, and in the time zone where the power rate is relatively low, A fourth control for charging the storage battery 30 with power from the power source S;
The storage battery 30 is discharged according to the power load of the entire plurality of consumers in a time zone where the power rate is relatively expensive, and the power from the commercial power source S is used in a time zone where the power rate is relatively inexpensive. A fifth control for charging the storage battery 30;
A sixth control for controlling charging / discharging of the storage battery 30 in order to suppress a difference between the power load and the procurement power of the plurality of consumers as a whole;
Can execute at least two or more controls, assign priorities to the executable controls, and execute the control selected according to the priorities.
By comprising in this way, a profit can be acquired more effectively by combining the several control method of the storage battery 30. FIG. That is, by giving priority to each control and executing the control according to the priority, the benefits of a plurality of controls can be obtained with a simple control method.

Further, the first control and the second control are:
The third control, the fourth control, the fifth control, and the sixth control are set to have a higher priority.
With this configuration, it is possible to preferentially execute control that is considered to be highly important. That is, the first control that suppresses voltage fluctuation and the second control that suppresses the demand value of the plurality of consumers as a whole are more important. Therefore, the first control and the second control are more important than other controls. Can also be profited more effectively by prioritizing execution.

Further, the fifth control and the sixth control are:
The first control, the second control, the third control, and the fourth control are set to have a lower priority.
By configuring in this way, it is possible to prioritize other control over control that is considered to be less important.

The control device 80 includes:
When executing the first control and the second control,
Regardless of the charge rate (SOC) of the storage battery 30, the storage battery 30 is discharged.
By configuring in this way, control that is considered to be highly important can be executed regardless of the charging rate of the storage battery 30. Thereby, the profit by the said control can be acquired more effectively.

The control device 80 includes:
When executing the third control, the fourth control, the fifth control and the sixth control,
Only the storage battery 30 having a charging rate equal to or higher than a predetermined threshold is discharged.
With this configuration, the control that is considered to be less important can be executed while ensuring a certain amount of charge in the storage battery 30. As a result, a certain amount of charge can be secured in the storage battery 30 for an emergency (such as during a power failure).

The predetermined threshold is:
Of the third control, the fourth control, the fifth control, and the sixth control, the higher the priority, the smaller the value is set.
By configuring in this way, control can be executed more appropriately. That is, by setting a threshold value in accordance with the priority order, control (discharge) can be performed more easily as the priority order (importance) is higher.

The dwelling unit 2 according to this embodiment is an embodiment of a consumer according to the present invention.
Moreover, the load device 20 according to the present embodiment is an embodiment of the power load according to the present invention.

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said structure, A various change is possible within the range of the invention described in the claim.

  For example, in the above embodiment, each control has been described by exemplifying specific numerical values. However, each numerical value is an example and can be arbitrarily changed.

  Moreover, in the said embodiment, a priority shall be set high in order of 1st control, 2nd control, 3rd control, 4th control, 5th control, and 6th control. However, the present invention is not limited to this, and the priority order can be arbitrarily changed. The priority order may be determined in advance and stored in the control device 80, or may be automatically set by the control device 80 based on various conditions.

  In the above embodiment, the control device 80 can execute the first control, the second control, the third control, the fourth control, the fifth control, and the sixth control. The present invention is not limited to this, as long as at least two of the six controls can be executed and priority is given to the executable controls.

  Moreover, in the said embodiment, since 4th control is prioritized over 5th control, the process which charges the storage battery 30 by 5th control was abbreviate | omitted (process which charges the storage battery 30 by 4th control). In the idea of the present invention, the fifth control includes a process of charging the storage battery 30. Therefore, not only the example shown in the present embodiment but also a process of charging the storage battery 30 in the fifth control may be performed.

  In the above embodiment, six controls are repeated every predetermined time (for example, every few seconds), but the present invention is not limited to this. For example, you may set the time interval which performs control according to a priority. For example, the first control and the second control (determining whether to perform charging / discharging) with high priority are always executed, and from the third control to the sixth control with low priority every predetermined time ( For example, it may be configured to be executed every 10 minutes.

  In the present embodiment, the power supply system 10 is applied to the apartment 1, but the present invention is not limited to this. For example, the present invention can be applied to a residential block composed of a plurality of detached houses.

DESCRIPTION OF SYMBOLS 1 Condominium 2 Dwelling unit 10 Electric power supply system 20 Load apparatus 30 Storage battery 40 Transformer 50 1st sensor 60 2nd sensor 70 3rd sensor 80 Control apparatus

Claims (6)

A plurality of consumers each having a storage battery capable of supplying power to the plurality of consumers' power loads;
A control device capable of controlling the operation of the storage battery;
A power supply system comprising:
The controller is
A first control for controlling charging / discharging of the storage battery in order to suppress voltage fluctuation;
A second control for discharging the storage battery to suppress the demand value of the plurality of consumers as a whole;
Third control for discharging the storage battery of the consumer in order to suppress the demand value of one of the consumers,
In a time zone in which the power rate is relatively expensive, the storage battery of the consumer is discharged according to the power load in one of the consumers, and in the time zone in which the power rate is relatively inexpensive, A fourth control for charging the storage battery with electric power from
The storage battery is discharged in accordance with the power load of the plurality of consumers as a whole during a time period when the power charge is relatively expensive, and the power from the commercial power source is supplied during the time period when the power charge is relatively inexpensive. And a fifth control to charge
A sixth control for controlling charging / discharging of the storage battery in order to suppress a difference between the power load and the procurement power of the plurality of consumers as a whole;
Can execute at least two or more controls, prioritize the executable controls, and execute the control selected according to the priorities.
Power supply system. The first control and the second control are:
The third control, the fourth control, the fifth control and the sixth control are set to have higher priority.
The power supply system according to claim 1. The fifth control and the sixth control are:
The first control, the second control, the third control, and the fourth control are set to have a lower priority.
The power supply system according to claim 1 or 2. The controller is
When executing the first control and the second control,
Discharge the storage battery regardless of the charge rate of the storage battery,
The power supply system according to any one of claims 1 to 3. The controller is
When executing the third control, the fourth control, the fifth control and the sixth control,
Discharging only the storage battery whose charging rate is equal to or higher than a predetermined threshold,
The power supply system according to any one of claims 1 to 4. The predetermined threshold is:
Among the third control, the fourth control, the fifth control, and the sixth control, the higher priority is set to be a smaller value,
The power supply system according to claim 5.

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