JP6369719B2 - Storage battery control method and storage battery control apparatus using the same - Google Patents

Description

  The present invention relates to a storage battery control technology, and more particularly to a storage battery control method for controlling charging and discharging of a storage battery and a storage battery control apparatus using the storage battery control method.

  In a system that supplies power to a load from a solar power generation device and a power storage device, stable and economical operation is desired. Therefore, a reference operation pattern group that determines the output sharing of each device is determined in advance, and one of the reference operation patterns is selected from the reference operation pattern group based on the current date and time. Furthermore, according to the selected reference | standard driving | operation pattern, each apparatus outputs electric power (for example, refer patent document 1).

JP 2012-244828 A

  A storage battery and a commercial power supply are connected in parallel to the load, and the storage battery is used as a backup for the power consumed by the load in case of a power failure of the commercial power supply. A system for charging and discharging the battery has been developed. When such a system is introduced into a school or the like, the amount of electric power used is different between weekdays and holidays. Therefore, in order to use the system efficiently, the control of the storage battery should be changed according to the day of the week.

  This invention is made | formed in view of such a condition, The objective is to provide the technique which changes control of a storage battery according to the usage-amount of electric power.

  In order to solve the above-described problem, a storage battery control device according to an aspect of the present invention includes a first secured storage capacity and a first secured storage capacity to be secured by the storage battery in preparation for a case where power supply of a commercial power supply is stopped. A first input unit for inputting a second reserved storage capacity having a value different from the first input unit, and a first input unit for inputting a switching timing between the first reserved storage capacity and the second reserved storage capacity input in the first input unit. And a control unit that causes the storage battery to secure the first secured storage capacity or the second secured storage capacity that is switched according to the timing input at the second input unit.

  Another aspect of the present invention is a storage battery control method. In this method, a first secured storage capacity to be secured by the storage battery and a second secured storage capacity having a value different from the first secured storage capacity in preparation for the case where the power supply of the commercial power supply is stopped are input. A step of inputting, a step of inputting a switching timing between the input first reserved storage capacity and the second reserved storage capacity, and a first reserved storage capacity or a second reserved storage capacity switched according to the input timing And securing the storage battery.

  According to the present invention, the control of the storage battery can be changed according to the amount of power used.

It is a figure which shows the structure of the electrical storage system which concerns on the Example of this invention. It is a figure for demonstrating the grid connection mode by the electrical storage system of FIG. It is a figure for demonstrating the independent operation mode by the electrical storage system of FIG. It is a figure which shows the structure of the storage battery control apparatus of FIG. It is a figure which shows the electrical storage amount which the electrical storage system of FIG. 1 charges a storage battery in a charge time slot | zone. FIGS. 6A to 6B are diagrams illustrating an example of the first secured storage capacity and the second secured storage capacity set in the storage battery control device of FIG. 4. FIGS. 7A to 7B are diagrams illustrating an example of fluctuations in the storage capacity due to the patterns set in the storage battery control device of FIG. 4. FIGS. 8A to 8G are diagrams showing screens displayed on the display unit of FIG. FIGS. 9A to 9F are diagrams showing other screens displayed on the display unit of FIG. FIGS. 10A to 10E are diagrams showing still another screen displayed on the display unit of FIG. It is a flowchart which shows the input procedure of the pattern in the storage battery control apparatus of FIG. It is a flowchart which shows the input procedure of the pattern change in the storage battery control apparatus of FIG. It is a flowchart which shows the setting procedure of the pattern change in the storage battery control apparatus of FIG.

  Before specifically describing the embodiment of the present invention, an outline of the present embodiment will be described. The embodiment relates to a power distribution system in which a solar battery and a system power supply are connected in parallel, and power is supplied from both the solar battery and the system power supply to a load. A storage battery is also connected to the power distribution system, and the storage battery is charged by a solar battery and a system power supply. Such a power distribution system is installed in, for example, a school, an industrial facility, a public facility, a commercial facility, an office building, a residence, and the like. When the electric power company adopts the electricity bill system by time zone, the electricity bill at night time is set lower than the electricity bill at daytime. For example, the electricity rate in the night time zone from 23:00 to 7:00 on the next day is set cheaper than other daytime hours. Therefore, the electricity charge is suppressed by charging the storage battery from the system power supply at night and using the electric power stored in the storage battery during the daytime. If this is seen from the electric power company side, the electric power consumption will be leveled.

  The electric power stored in the storage battery is used as a backup power source for operating a specific load (for example, a light, an elevator, a computer server, etc.) when the system power supply fails. The specific load is a preset load that can receive power supply from the storage battery or the solar power generation system preferentially at the time of a power failure of the system power supply. A load other than the specific load is called a general load. The storage battery is further used as a so-called peak shift that lowers the maximum value of the usage amount in the daytime system power supply by discharging in the daytime period when the usage amount of electricity is generally large. In this way, the storage battery has two roles: a role as a backup for a specific load and a role as a peak shift.

  When a power distribution system is installed in a school, for example, generally, the amount of power consumed differs greatly between weekdays and holidays. Therefore, in order to effectively realize the above two roles, the charge / discharge control for the storage battery should be changed on weekdays and holidays. In order to cope with this, at least two charge / discharge patterns are input in the power distribution system according to the present embodiment. One of the patterns is selected for each day of the week. As a result, charge / discharge is controlled by different patterns on weekdays and holidays.

  FIG. 1 shows a configuration of a power storage system 100 according to an embodiment of the present invention. The power storage system 100 includes a storage battery module 10, a storage battery power conditioner 20, a storage battery control device 30, a first switch S1 to a seventh switch S7, and a first breaker B1 to a third breaker B3. The power storage system 100 is connected to a system power source 200, a photovoltaic power generation system 300, a general load 400, and a specific load 500. The photovoltaic power generation system 300 includes a PV (PhotoVolts; solar cell) 310 and a PV power conditioner 40. In this embodiment, it is assumed that a relay is used from the first switch S1 to the seventh switch S7. However, a semiconductor switch such as a power MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) may be used instead of the relay. Good. In addition, although the electrical storage system 100 is illustrated as a power generator of renewable energy, the power generator of renewable energy is not restricted to the electrical storage system 100, For example, a wind power generator may be sufficient, and these may coexist. Good.

  The system power source 200 is a commercial AC power source supplied from an electric power company. The system power supply 200 is connected to the storage battery power conditioner 20 via the second switch S2. The system power supply 200 and the PV power conditioner 40 are connected via a fifth switch S5, a seventh switch S7, and a third breaker B3. Furthermore, the storage battery power conditioner 20 and the PV power conditioner 40 are connected via a third switch S3, a fourth switch S4, a seventh switch S7, and a third breaker B3.

  The path between the system power supply 200 and the storage battery power conditioner 20, the path between the system power supply 200 and the PV power conditioner 40, and the path between the storage battery power conditioner 20 and the PV power conditioner 40 are configured to be conductive. Alternating current flows through these paths. Hereinafter, these paths are collectively referred to as an alternating current path.

  The storage battery power conditioner 20 is connected to the storage battery module 10 via the first switch S1 and the first breaker B1. Storage battery power conditioner 20 includes a bidirectional inverter. The bidirectional inverter converts AC power into DC power when the storage battery module 10 is charged, and converts DC power into AC power when the storage battery module 10 is discharged. In addition, the storage battery power conditioner 20 may have a configuration in which a DC / AC inverter that converts direct current power to alternating current power and an AC / DC converter that converts alternating current power to direct current power are separately provided instead of the bidirectional inverter. Good. The former is used when discharging from the storage battery module 10, and the latter is used when charging the storage battery module 10.

  The storage battery module 10 is a packaged secondary battery that can be freely charged and discharged and can be used repeatedly. The storage battery module 10 includes a plurality of storage battery cells connected in series or series-parallel. Here, it is assumed that a lithium ion battery is used as the storage battery cell. Other types of batteries such as nickel metal hydride batteries and lead batteries may be used instead of lithium ion batteries. The storage battery module 10 is used alone or in combination. The storage battery module 10 is charged with power from the system power supply 200. Alternatively, the storage battery module 10 is charged with electric power generated by the solar power generation system 300. In addition, as above-mentioned, these electric power is converted into direct-current power by the storage battery power conditioner 20. FIG.

  The photovoltaic power generation system 300 includes a PV 310 and a PV power conditioner 40, and the PV power conditioner 40 is connected to the PV 310. The PV 310 is a power generation device that uses the photovoltaic effect. Any of silicon, compound, and organic may be used for PV310. The PV power conditioner 40 includes an inverter, and the inverter converts DC power generated by the PV 310 into AC power. When the PV power conditioner 40 converts the DC power generated by the PV 310 into AC power, the system power source 200, the storage battery module 10, and the solar power generation system 300 can be linked by a single AC current path.

  General load 400 is connected on a path between system power supply 200 and power storage system 100. The specific load 500 is connected to a node between the fourth switch S4 or the fifth switch S5 and the seventh switch S7 in the alternating current path via the sixth switch S6 and the second breaker B2. Both the general load 400 and the specific load 500 are AC drive type electric devices driven by AC power, and operate by receiving AC power supplied from an AC current path.

  Specifically, the general load 400 is basically driven by the power supplied from the system power supply 200. For example, when the peak shift is performed, the power supplied from the storage battery module 10 via the storage battery power conditioner 20 is also mixed. To be driven. Furthermore, the power generated by the solar power generation system 300 may be mixed even when the peak shift is not performed. The specific load 500 is an electric device that should be driven even when the power supply of the system power supply 200 is interrupted and the power supply is stopped. At that time, power from the solar power generation system 300 and the storage battery module 10 is supplied. The power is not supplied from the system power supply 200.

  The storage battery control device 30 is a device for mainly controlling the operation of the storage battery module 10. Details of the control of the storage battery module 10 will be described later. The storage battery control device 30 and the storage battery power conditioner 20 are connected by a communication line using a metal line. Between them, communication conforming to serial communication standards such as RS-232C and RS-485 is executed. The communication lines may be insulated from each other by using a communication line using an optical fiber. Moreover, the storage battery control apparatus 30 is connected to the storage battery module 10 by a communication line using an optical fiber. Note that these communications may be wireless communications.

  Each of the first switch S1 to the seventh switch S7 and the first breaker B1 to the third breaker B3 is connected to the storage battery power conditioner 20 by a communication line using metal wiring (not shown). These are controlled by the storage battery power conditioner 20 based on an instruction from the storage battery control device 30 to the storage battery power conditioner 20 or based on a judgment unique to the storage battery power conditioner 20. With these configurations, the power storage system 100 is operated in either the grid connection mode or the independent operation mode. The self-sustained operation mode is basically selected at the time of power failure of the system power supply 200.

  FIG. 2 is a diagram for explaining the grid interconnection mode by the power storage system 100. In the grid connection mode, the storage battery power conditioner 20 controls the second switch S2 and the fifth switch S5 to be on and the third switch S3 and the fourth switch S4 to be off. In the grid connection mode, the grid power supply 200, the photovoltaic power generation system 300, and the storage battery power conditioner 20 are connected via an AC current path (see thick line). When discharging from the storage battery module 10 in the grid connection mode, the storage battery power conditioner 20 causes a current to flow through the AC current path at a frequency and phase synchronized with the frequency of the system power supply 200.

  FIG. 3 is a diagram for explaining a self-sustained operation mode by the power storage system 100. In the self-sustained operation mode, the storage battery power conditioner 20 controls the second switch S2 and the fifth switch S5 to be off and the third switch S3 and the fourth switch S4 to be on. In the self-sustained operation mode, the photovoltaic power generation system 300 and the storage battery module 10 are electrically disconnected from the system power supply 200. When discharging from the storage battery module 10 in the self-sustained operation mode, the storage battery power conditioner 20 causes a current to flow through the AC current path at a frequency and phase independent from the system power supply 200. In the alternating current path (see thick line) formed in the self-sustaining operation mode, the specific load 500 is electrically connected, but the general load 400 is electrically cut off. Therefore, at the time of a power failure, only the specific load 500 is supplied with the power stored in the storage battery module 10 and the power generated by the solar power generation system 300.

  FIG. 4 shows the configuration of the storage battery control device 30. The storage battery control device 30 includes an operation unit 50, a first input unit 52, a second input unit 54, a first pattern setting unit 56, a second pattern setting unit 58, a pattern control unit 60, a storage battery control unit 62, an instruction unit 64, A display unit 66 is included. The first pattern setting unit 56 includes a first reserved storage capacity setting unit 70 and a first schedule setting unit 72, and the second pattern setting unit 58 includes a second reserved storage capacity setting unit 80 and a second schedule setting unit 82. Including.

  The operation unit 50 includes buttons and receives instructions from the user. The first input unit 52 is an instruction received in the operation unit 50 and receives an instruction regarding a pattern regarding a schedule for charging and discharging the storage battery module 10. A plurality of types of patterns can be defined. Here, two types of patterns are defined. Each of the two types of patterns is called a first pattern and a second pattern. The instruction regarding the first pattern received by the first input unit 52 includes a first secured storage capacity, a first discharge time zone, a first discharge amount, and a first charge time zone.

  The first reserved storage capacity is a capacity that should be reserved in the storage battery module 10 in case the power supply of the system power supply 200 (not shown) is stopped. As the first secured power storage capacity increases, the time during which power can be supplied to the specific load 500 becomes longer in the self-sustained operation mode connected as shown in FIG. The first discharge time zone is a time zone in which the storage battery module 10 is discharged for a peak shift or the like. The first discharge amount is a discharge amount that permits the storage battery module 10 to discharge over the first discharge time zone, and is shown as a discharge rate per hour, for example. The first charging time zone is a time zone in which the storage battery module 10 is charged with the power of the system power supply 200. In the present specification, the term “amount”, such as “amount of stored electricity” or “amount of discharge”, is used for the power stored in the storage battery module 10 or discharged. Further, the term “capacity” is used for the electric power stored in the storage battery module 10 as “storage capacity”.

  In addition, the instruction relating to the second pattern received in the first input unit 52 includes a second secured power storage capacity, a second discharge time zone, a second discharge amount, and a second charge time zone. These are the same as the first secured storage capacity, the first discharge time zone, the first discharge amount, and the first charge time zone. The second secured storage capacity is a value different from the first secured storage capacity. In addition, at least one of the second discharge time zone, the second discharge amount, and the second charge time zone is a value different from the first discharge time zone, the first discharge amount, and the first charge time zone. Here, the first secured storage capacity and the second secured storage capacity are collectively referred to as the secured storage capacity, the first discharge time zone and the second discharge time zone are collectively referred to as the discharge time zone, and the first discharge amount and the second discharge amount. Is collectively referred to as a discharge amount, and the first charging time zone and the second charging time zone are collectively referred to as a charging time zone. Further, the secured storage capacity may be referred to as the minimum secured capacity.

  The first reserved storage capacity setting unit 70 holds the first reserved storage capacity among the first patterns received by the first input unit 52. When the first reserved storage capacity setting unit 70 receives the notification of the first pattern selection from the pattern control unit 60, the first reserved storage capacity setting unit 70 sets the first reserved storage capacity in the storage battery control unit 62. The first schedule setting unit 72 holds the first discharge time zone, the first discharge amount, and the first charge time zone among the first patterns received by the first input unit 52. Upon receiving the first pattern selection notification from the pattern control unit 60, the first schedule setting unit 72 sets the first discharge time zone, the first discharge amount, and the first charge time zone in the storage battery control unit 62.

  The second secured storage capacity setting unit 80 holds the second secured storage capacity similarly to the first secured storage capacity setting unit 70. Similar to the first schedule setting unit 72, the second schedule setting unit 82 holds the second discharge time zone, the second discharge amount, and the second charge time zone. When receiving the notification of the second pattern selection from the pattern control unit 60, the second secured storage capacity setting unit 80 sets the second secured storage capacity in the storage battery control unit 62, and the second schedule setting unit 82 A discharge time zone, a second discharge amount, and a second charge time zone are set in the storage battery control unit 62.

  The second input unit 54 is an instruction received in the operation unit 50 and receives an instruction regarding the switching timing of the first pattern and the second pattern. Here, the switching timing is 0 o'clock. Therefore, in the instruction, the correspondence between the selection result of either the first pattern or the second pattern and each day of the week is shown. For example, “first pattern” is associated with Monday through Friday, and “second pattern” is associated with Saturday and Sunday.

  The pattern control unit 60 holds the correspondence received by the second input unit 54. The pattern control unit 60 has a clock function and a calendar function, and acquires the current day of the week. The pattern control unit 60 selects a pattern corresponding to the current day of the week while referring to the held correspondence. When the first pattern is selected, the pattern control unit 60 outputs a first pattern selection notification to the first pattern setting unit 56. When the second pattern is selected, the pattern control unit 60 sets the second pattern selection notification to the second pattern setting. To the unit 58. The pattern control unit 60 also includes a first screen for prompting the first input unit 52 to input the first pattern and the second pattern, and a second screen for prompting the second input unit 54 to input timing. Is generated.

  The display unit 66 is configured by, for example, an LCD (Liquid Crystal Display) panel, and displays the first screen or the second screen generated by the pattern control unit 60 while switching. The first screen and the second screen will be described later.

  When the pattern control unit 60 selects the first pattern, the storage battery control unit 62 uses the storage battery module 10 based on the first secured storage capacity, the first discharge time zone, the first discharge amount, and the first charge time zone. Executes control for. When the second pattern is selected by the pattern control unit 60, the storage battery control unit 62 uses the storage battery module 10 based on the second secured storage capacity, the second discharge time zone, the second discharge amount, and the second charge time zone. Executes control for. The instruction unit 64 outputs an instruction according to the control in the storage battery control unit 62 to the storage battery module 10. In the control of the storage battery module 10, the storage battery control unit 62 is based on the secured storage capacity, the total amount of power that the storage battery module 10 discharges in the discharge time zone, and the conversion efficiency when converting the DC power supply to the AC power supply. Then, the amount of electricity stored in the storage battery module 10 in the charging time zone is acquired.

FIG. 5 shows the amount of electricity stored in the storage battery by the electricity storage system 100 during the charging time period. In order to charge the storage battery module 10 with AC power from the system power supply 200, AC power is converted into DC power, and an AC / DC conversion loss occurs during this conversion. Further, in order to supply the electric power discharged from the storage battery module 10 to the general load 400 or the specific load 500, the direct current power is converted into the alternating current power. However, a DC / AC conversion loss also occurs during this conversion. Secure storage capacity is P _F, the total amount of power to be discharged to the accumulator module 10 to the discharge time period, i.e. the power storage capacity for peak shift is P _S, the ratio of AC / DC conversion loss is assumed to be R _AD. Here, the AC / DC conversion loss R _AD represents the magnitude of AC power converted when the DC power discharged by the storage battery module 10 is 1. Therefore, 0 <R _AD ≦ 1.

At this time, the storage amount P _m to be charged to the battery module 10 in the charging time period is shown as follows.
_{P m ≦ (P F + P} S) / R AD (1)
The condition for establishing the equal sign is when the storage battery module 10 is charged from an empty state.

In the storage battery module 10, the power storage allowance P _M is previously determined as the upper limit of the electricity storage possible power. Therefore, the storage battery control unit 62 when the electricity storage amount P _m obtained using Equation (1) exceeds the power storage allowance P _M, the power storage allowance P _M and the storage amount P _m. The allowable storage amount P _M may be determined by experiment in consideration of the allowable maximum voltage of the storage battery, charge / discharge characteristics, or the like, or may be determined based on the rated capacity of the storage battery defined in advance, for example, 15 kWh.

As described earlier, secured storage capacity P _F is because it is the power storage capacity to the storage battery module 10 is set aside for when the system power supply 200 is a power failure, the battery module 10 as long as the system power supply 200 is not a power failure ensures storage capacity It has a minimum power storage the P _F. Therefore, in order to charge the battery module 10 in the charging time period, the storage amount P ₁ to be actually supplied power grid 200 is shown as follows.
_{P 1 = (P m -P F} ) / R AD = P S / R AD (2)
Further, the AC power P ₂ to be supplied to common load 400 or specific load 500 is shown as follows.
_{P 2 = P S × R DA} (3)

In addition to such control, the storage battery control unit 62 controls charging / discharging of the storage battery module 10 according to a pattern set according to the day of the week. Here, the control will be described in detail. FIGS. 6A to 6B show an example of the first secured storage capacity and the second secured storage capacity set in the storage battery control device 30. FIG. FIG. 6A shows the first reserved storage capacity P _F1 , the horizontal axis indicates the time, and the vertical axis indicates the storage capacity. Here, the time corresponds to one day. As described above, the first secured storage capacity P _F1 is a storage capacity that the storage battery module 10 should secure in the event of a power failure of the system power supply 200, and thus is a constant value regardless of the time.

FIG. 6B shows the second secured storage capacity _PF2 . The second secured storage capacity P _F2 is also shown in the same manner as the first secured storage capacity P _F1 . Here, the second secured storage capacity P _F2 is set to be larger than the first secured storage capacity P _F1 . For example, when the first pattern is used for weekdays and the second pattern is used for holidays, the amount of electric power used on weekdays is larger than that on holidays, so the first reserved storage capacity _PF1 is more by being small, it can be increased storage capacity P _S for peak shift. In addition, when a power failure occurs on a holiday, the time until the response is longer than that on weekdays becomes longer, so the second secured storage capacity _PF2 is made larger. Note that the second securing storage capacity P _F2 may be set to be smaller than the first secure storage capacity P _F1.

FIGS. 7A to 7B show an example of fluctuations in the storage capacity due to the pattern set in the storage battery control device 30. FIG. Fig.7 (a) shows an example of the fluctuation | variation of the electrical storage capacity in one day of the storage battery module 10 when the 1st pattern is set. Until the time T ₁ is charged to the power storage allowance P _M. Time T ₁ is the discharge start time, time T _2, is a discharge end time. Accordingly, the period from time T ₁ until the time T _2, becomes the first discharge time period. In the first discharge time zone, the storage battery control unit 62 causes the storage battery to discharge for peak shift, so that the storage capacity of the storage battery module 10 gradually decreases. In time T _2, which is the end time of the first discharge time period, the power storage capacity of the storage battery module 10 is reduced to the first secure storage capacity P _F1.

In the case where the storage battery module 10 in the first discharge time period the power storage capacity of the storage battery module 10 during the discharge has reached the first secure storage capacity P _F1, battery control unit 62 may be a first discharge time period battery While stopping the discharge of the module 10, the storage battery power conditioner 20 is notified of a warning of an abnormal state. The storage battery power conditioner 20 is also provided with an LCD panel (not shown), and displays an unusual display such as a red backlight. When the first discharge time period ends, the storage battery control unit 62 ends the abnormality notification to the storage battery power conditioner 20, and the abnormal state is released.

Time T ₃ is a charging start time, time T ₄ is an end-of-charge time. Accordingly, the period from time T ₃ until the time T ₄ is a first charging time period. Battery control unit 62 in the first charging time period, for charging the storage battery module 10, the power storage capacity of the storage battery module 10 is increased from the first secure storage capacity P _F1, time T ₄ near at reaching the power storage allowance P _M To do. In FIG. 7A, one first discharge time zone and one first charge time zone are set, but these numbers may be two or more.

FIG.7 (b) shows an example of the fluctuation | variation of the electrical storage capacity in one day of the storage battery module 10 when the 2nd pattern is set. As shown in FIG. 7B, since the storage battery module 10 is not discharged for peak shift, the storage capacity of the storage battery module 10 is maintained as the second secured storage capacity _PF2 and does not vary. As described above, the second pattern is used for holidays. Therefore, here, the second discharge time zone and the second charging time are not set, but may be set as shown in FIG. Here, when changing from Sunday to Monday, the storage battery control unit 62 switches from the second pattern to the first pattern. Figure 7 (a) - as shown in (b), at the timing of switching, the gap occurs between the second securing storage capacity P _F2 and the storage allowance P _M. After switching, the storage battery control unit 62 charges the storage battery module 10 so as to fill the gap regardless of the first pattern. 7A to 7B, the storage battery control unit 62 causes the storage battery module 10 to secure the first secured storage capacity or the second secured storage capacity.

  Next, a screen displayed on the display unit 66 will be described. FIGS. 8A to 8G show screens displayed on the display unit 66. These correspond to the first screen described above. The display unit 66 of the storage battery control device 30 in FIG. 4 is a display panel capable of displaying, for example, 20 characters × 4 lines of ASCII characters. While confirming the screen displayed on the display unit 66, the user operates the operation unit 50 to input or update information necessary for setting.

  FIG. 8A shows a screen for inputting whether or not to change the charge / discharge schedule of the storage battery module 10. FIG. 8B is a screen following FIG. 8A, and the setting of the first reserved storage capacity and the like stored in the first pattern setting unit 56 and the second pattern setting unit 58 of FIG. The screen for inputting whether to edit or not is shown. The user operates the operation unit 50 to select “high” or “no”. FIG. 8C is a screen that is displayed when “HIGH” is selected in the screen of FIG. 8B, and is a screen for selecting a pattern to be edited. The user operates the operation unit 50 to select “first pattern” or “second pattern”. In FIG. 8C, the “first pattern” is selected.

FIG. 8 (d) a screen displayed when the "first pattern" is selected in the screen of FIG. 8 (c), and shows the screen for setting the first securing storage capacity P _F1. Here, minimum reserved capacity is first secured storage capacity _{P F1} is set to 5.0KWh. FIG. 8E is a screen displayed after FIG. 8D, and is a screen for inputting a schedule between 1 o'clock and 2 o'clock. The user inputs a charging time zone, a discharging time zone, and other time zones while operating the operation unit 50. In the discharge time zone, the discharge amount is also input. The pattern for one day is divided into “24” in units of one hour, and the display shown in FIG. 8E is performed in order to input the divided hourly pattern. FIG. 8F is a screen similar to FIG. 8E, and is a screen for inputting a schedule between 21:00 and 22:00. FIG. 8G shows a screen that is displayed after the input of the first pattern is completed and for selecting whether to “set the second pattern” or “write changes”. The user selects one while operating the operation unit 50.

  FIGS. 9A to 9F show other screens displayed on the display unit 66. These also correspond to the first screen described above. 9A shows a screen displayed when “Set second pattern” is selected in the screen of FIG. 8G, or “Second pattern” is selected in the screen of FIG. 8C. The screen that is displayed when This is shown in the same manner as in FIG. FIGS. 9B to 9D are second pattern input screens corresponding to FIGS. 8D to 8F. FIG. 9E shows a screen that is displayed after the input of the second pattern is completed and for selecting whether to “set the first pattern” or “write changes”. The user selects one while operating the operation unit 50. FIG. 9F shows a screen for inputting whether or not to write the input pattern. This screen is displayed when “write changes” is selected in FIG. 8G or FIG.

  FIGS. 10A to 10E show still another screen displayed on the display unit 66. FIG. These correspond to the second screen described above. FIG. 10A shows a screen for inputting whether or not to set the day of the week pattern. FIG. 10B shows a screen when setting is selected on the screen of FIG. Here, “first pattern” or “second pattern” can be selected for Monday, and “first pattern” is selected for other days of the week as in FIG. 10B. A screen is displayed, and FIG. 10C shows a setting screen for Sunday. FIG. 10D shows a screen that is displayed after the input of the day of the week pattern, and one of “stop setting”, “write”, and “return to the top” is selected. FIG. 10E shows a screen displayed when “write” is selected on the screen of FIG. The user selects “high” or “no” while operating the operation unit 50.

  The operation of the power storage system 100 having the above configuration will be described. FIG. 11 is a flowchart showing a pattern input procedure in the storage battery control device 30. When the operation unit 50 accepts the schedule change (S10) and accepts the input of the first pattern (Y of S12), the user inputs the first reserved storage capacity to the first input unit 52 (S14), and the first schedule is obtained. Input (S16). The first schedule corresponds to the above-described first discharge time zone, first discharge amount, and first charge time zone. If there is a further setting change (Y in S18), or if the input of the first pattern is not accepted (N in S12), the user inputs the second reserved storage capacity to the second input unit 54 (S20), and the second A schedule is input (S22). The second schedule corresponds to the above-described second discharge time zone, second discharge amount, and second charge time zone. If there is a further setting change (Y in S24), the process returns to step 14. If there is no further setting (N in S18, N in S24), the first pattern setting unit 56 and the second pattern setting unit 58 write the input information (S26).

  FIG. 12 is a flowchart showing an input procedure for pattern change in the storage battery control device 30. The user sets the variable i to “1” in the second input unit 54. The second input unit 54 associates the first pattern or the second pattern with the i-th day of the week (S42). The second input unit 54 adds 1 to the variable i (S44). If i> 7 is not satisfied (N in S46), the process returns to step 42. If i> 7 (Y in S46), the pattern control unit 60 writes the input information (S48).

  FIG. 13 is a flowchart showing a pattern change setting procedure in the storage battery control device 30. The power is turned on (S60). A pattern corresponding to the day of the week is set in the storage battery control unit 62 (S62). If the power is not turned off (N in S64), the day of the week is changed (S66), and the process returns to step 62. If the power is turned off (Y in S64), the process is terminated.

  According to the present embodiment, since two types of reserved storage capacities and switching timing are set, any one of the reserved storage capacities can be selected and set for each day of the week. In addition, since one of the reserved storage capacities is selected and set for each day of the week, the control of the storage battery can be changed according to the amount of power used. In addition, two types of discharge time zone, discharge amount, and charging time zone are set, and switching timing is also set, so that any pattern can be selected and set for each day of the week. In addition, since any pattern is selected and set for each day of the week, storage battery control suitable for weekdays or holidays can be executed. Moreover, since the first screen or the second screen is switched and displayed when setting is input, the convenience of input can be improved.

  In the above, this invention was demonstrated based on the Example. This embodiment is an exemplification, and it will be understood by those skilled in the art that various modifications can be made to the combination of each component and each processing process, and such modifications are also within the scope of the present invention. .

  In the present embodiment, the pattern control unit 60 sets the first pattern or the second pattern in units of one day, that is, 24 hours from 0:00 to 24:00. However, the present invention is not limited to this. For example, the pattern control unit 60 may set the start time of the day to a time other than 0:00, and set the first or second pattern setting unit to a time shorter or longer than 24 hours. May be. According to this modification, the degree of freedom of configuration can be improved.

  In the present embodiment, two types of patterns are input to the storage battery control device 30 and are used while being switched. However, the present invention is not limited thereto, and for example, three or more types of patterns may be input to the storage battery control device 30 and used while being switched. According to this modification, control can be executed in detail.

The invention according to the present embodiment may be specified by the items described below.
(Item 1)
A first secure storage capacity to be secured by the storage battery in preparation for the case where the power supply of the commercial power supply is stopped, and a second secure storage capacity having a value different from the first secure storage capacity are input. An input unit 52;
A second input unit 54 for inputting a switching timing between the first secured storage capacity and the second secured storage capacity input in the first input unit 52;
A storage battery control unit 62 that secures the storage battery with the first secured storage capacity or the second secured storage capacity switched according to the timing input in the second input unit 54;
A storage battery control device 30 comprising:

(Item 2)
A first screen for prompting input of the first secured storage capacity and the second secured storage capacity to the first input unit 52; and a first screen for prompting input of the timing to the second input unit 54. The storage battery control device 30 according to item 1, further comprising a display unit that displays two screens.

(Item 3)
Inputting a first secured storage capacity to be secured by the storage battery and a second secured storage capacity having a value different from the first secured storage capacity in preparation for the case where the power supply of the commercial power supply is stopped; ,
Inputting a switching timing between the input first secured storage capacity and the second secured storage capacity;
Allowing the storage battery to secure the first secured storage capacity or the second secured storage capacity switched according to the input timing;
A storage battery control method comprising:

  DESCRIPTION OF SYMBOLS 10 Storage battery module, 20 Storage battery power conditioner, 30 Storage battery control apparatus, 40 PV power conditioner, 50 Operation part, 52 1st input part, 54 2nd input part, 56 1st pattern setting part, 58 2nd pattern setting part , 60 pattern control unit, 62 storage battery control unit, 64 instruction unit, 66 display unit, 70 first secured storage capacity setting unit, 72 first schedule setting unit, 80 second secured storage capacity setting unit, 82 second schedule setting unit , 100 power storage system, 200 system power supply, 300 solar power generation system, 310 PV, 400 general load, 500 specific load.

Claims (3)

A first secure storage capacity to be secured by the storage battery in preparation for the case where the power supply of the commercial power supply is stopped, and a second secure storage capacity having a value different from the first secure storage capacity are input. An input section;
A second input unit for inputting a switching timing between the first secured storage capacity and the second secured storage capacity input in the first input unit;
A control unit for causing a storage battery to secure the first secured storage capacity or the second secured storage capacity switched according to the timing input in the second input unit;
A storage battery control device comprising:   A first screen for prompting input of the first secured storage capacity and the second secured storage capacity to the first input unit, and a second screen for prompting input of the timing to the second input unit The storage battery control device according to claim 1, further comprising: a display unit that displays. Inputting a first secured storage capacity to be secured by the storage battery and a second secured storage capacity having a value different from the first secured storage capacity in preparation for the case where the power supply of the commercial power supply is stopped; ,
Inputting a switching timing between the input first secured storage capacity and the second secured storage capacity;
Allowing the storage battery to secure the first secured storage capacity or the second secured storage capacity switched according to the input timing;
A storage battery control method comprising:

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