JP7389977B2 - power control system - Google Patents

Description

The present invention relates to a power control system, and more particularly to a battery system including a battery, a converter, etc., and a power control system including a power generator.

Power control for satellites has traditionally been based on surplus power control (shunt control), and the basic configuration of power control systems for satellites is generally a "shunt circuit + battery charger (+ battery discharger)". . In a space environment where there is no grid power supply, the highest priority is to efficiently supply the power generated by solar cells to bus equipment, and the output power of solar cells can be supplied to bus equipment without going through a power conversion device such as a converter. Shunt control is recognized as the optimal power control method for spacecraft.

On the other hand, for spacecraft with limited launch capabilities, it is necessary to make the equipment smaller and lighter. Reductions in size and weight are progressing through the application of power conversion devices and the like (see Non-Patent Document 1 below). Furthermore, in order to miniaturize the shunt circuit, a technique has been devised to reduce the power generated by the solar cell when it is not needed (see Patent Documents 1 to 3 below, etc.).

Japanese Unexamined Patent Publication No. 6-144399 Japanese Patent Application Publication No. 7-101400 Japanese Patent Application Publication No. 8-258800

M. Iwasa, H. Kusawake, S. Shimada, A. Ishii, Y. Kikuchi, K. Aoki, J. Shimizu and T. Ito, LIGHTWEIGHT POWER CONTROL UNITS AND POWER DISTRIBUTION CONTROL UNIT FOR SATELLITES, the journal of space technology and science, vol.28, no.1, pp.30-36, 2013.

The power required for artificial satellites is on the rise, and in particular, communication and broadcasting satellites, which are typical geostationary satellites, require large amounts of power in the tens of kilowatts, and power control systems are required to be even smaller and lighter. There is. However, with the conventional basic configuration of "shunt circuit + battery charger (+ battery discharger)", there is a limit to the reduction in size and weight. Furthermore, in the method of reducing the power generated by the solar cell, it is difficult to eliminate the shunt circuit, or even if it is possible, a device larger than the shunt circuit is required, which is not realistic.

This situation is the same on the ground, and in power control systems, not only when the power generation device is a solar cell, but also when the power generation device is a wind power generation device, a fuel cell, etc. The same is true.

Therefore, one of the objects of the present invention is to provide a power control system for the power generated by a power generation device, which is further reduced in size and weight.

One aspect of the present invention includes a power generation device, a bus device, at least one battery system, and an integrated control device that controls the at least one battery system, the bus device and the at least one A battery system is directly connected in parallel to the power generating device, each of the at least one battery system including a bidirectional power converter and a battery, and each of the bidirectional power converting device being connected to the output voltage of the power generating device. The battery is charged and discharged by converting the output voltage of the battery and outputting it to the bus device side, and the integrated control device controls the at least one battery system. The present invention provides a power control system in which the at least one battery system controls the bus voltage of the bus device.

The power generation device is a solar cell, and the power control device further includes a solar cell rotation mechanism, and the integrated control device controls charging and discharging of the at least one battery system and rotation control of the solar cell rotation mechanism. Accordingly, the output power of the solar cell and the bus voltage of the bus device can be controlled.

The control of the bus voltage of the bus device may be such that the value of the bus voltage falls within a predetermined range with respect to a predetermined value.

The integrated control device may instruct a first battery system of the at least one battery system to perform an MPPT (maximum power tracking) mode as the predetermined charge/discharge control during the sunshine mode. can.

When the voltage value of the first battery of the first battery system becomes the first voltage value, the integrated control device performs the charging/discharging control by adjusting the bus voltage value to the first battery system. A constant bus voltage charging mode, which is a control mode in which the battery is charged such that the voltage is within a predetermined range with respect to a predetermined value, may be instructed.

When the voltage value of the first battery of the first battery system becomes the third voltage value, the integrated control device controls the bus voltage to be constant for the first battery system as the charge/discharge control. The output power of the solar cell is reduced by instructing the solar cell rotation mechanism to rotate the solar cell and adjusting the incident angle of sunlight to the solar cell while instructing the charging mode. be able to.

When the voltage value of the first battery of the first battery system becomes the fifth voltage value, the integrated control device controls the battery to a constant voltage with respect to the first battery system as the charge/discharge control. A constant voltage charging mode, which is a control mode for charging, may be instructed.

In the shade mode, the integrated control device performs the charge/discharge control on the first battery system to discharge the battery so that the value of the bus voltage falls within a predetermined range with respect to a predetermined value. The bus voltage constant discharge mode may be specified.

The power control system may further include a spare battery, and the spare battery may be connected in series or parallel to the first battery.

The bidirectional power conversion device may be a bidirectional DC/DC converter.

One aspect of the present invention includes a power generation device, a bus device, at least one battery system, and an integrated control device that controls the at least one battery system, the bus device and the at least one A battery system is directly connected in parallel to the power generating device, each of the at least one battery system including a bidirectional power converter and a battery, and each of the bidirectional power converting device being connected to the output voltage of the power generating device. A power control method in a power control system that charges and discharges the battery by converting the output voltage of the battery and outputting it to the battery side, converting the output voltage of the battery and outputting it to the bus device side, the integrated power control method comprising: The present invention provides a power control method in which a control device instructs the at least one battery system to perform predetermined charge/discharge control, and the at least one battery system controls a bus voltage of the bus device.

One aspect of the present invention provides a program for causing a computer to execute the power control method.

One aspect of the present invention provides a computer-readable storage medium storing the program.

According to the present invention having the above-described configuration, it is possible to provide a power control system for power generated by a power generating device, which supplies power to bus equipment without going through a power converter and is further reduced in size and weight.

1 is a diagram showing the overall configuration of a power control system according to one embodiment of the present invention. 1 is a diagram illustrating an example of a hardware configuration of an integrated control device 50 of a power control system according to an embodiment of the present invention. 3 is a flowchart of power control processing in a sunshine mode of the power control system according to one embodiment of the present invention.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing the overall configuration of a power control system 1 according to one embodiment of the present invention. The power control system 1 includes a solar cell 10, a solar cell rotation mechanism 11, a first battery system 20, a second battery system 30, a bus device 40, and an integrated control device 50.

The first battery system 20, the second battery system 30, and the bus device 40 are directly connected to the solar cell 10 in parallel.

The solar cell rotation mechanism 11 can change the output power of the solar cell by rotating the solar cell 10 and changing the angle of incidence of sunlight on the solar cell 10.

The first battery system 20 includes a first bidirectional DC/DC converter 210, which is a first power conversion device, and a first battery 230. Similarly, the second battery system 30 includes a second bidirectional DC/DC converter 310 and a second battery 330.

The first bidirectional DC/DC converter 210 includes a first control section 211 and a first storage section 213. Similarly, the second bidirectional DC/DC converter 310 includes a second control section 311 and a second storage section 313. The first bidirectional DC/DC converter 210 and the second bidirectional DC/DC converter 310 each convert the output voltage of the solar cell 10 by PWM (pulse width modulation) and output it to the battery side. The first battery 230 and the second battery 330 are charged and discharged by converting the output voltages of the battery 230 and the second battery 330 and outputting the converted voltages to the bus device side. The first control unit 211 and the second control unit 311 control the PWM duty ratio of each bidirectional DC/DC converter. In each bidirectional DC/DC converter, each voltmeter and ammeter (not shown) measure the operating voltage and output current of the solar cell 10, the input side voltage value (bus voltage value) of the bidirectional DC/DC converter, and the output The side voltage value (battery voltage value), input side current value, output side current value, etc. are measured and input to each control section.

The integrated control device 50 monitors the overall system status such as the solar cell 10, the bus device 40, the bidirectional DC/DC converter of each battery system, the battery voltage and current, and the battery SOC (State of Charge). Based on the monitoring results, and based on whether the mode is sunlight mode or shade mode, it is determined which control mode is to be instructed to which bidirectional DC/DC converter, and each bidirectional DC/DC converter is The determined control mode is instructed to the DC converter, and the rotation angle is also instructed to the solar cell rotation mechanism 11 as necessary. In this embodiment, there are six control modes: MPPT (maximum power tracking) mode, constant current charging mode, constant current discharging mode, constant voltage charging mode, constant bus voltage charging mode, and constant bus voltage discharging mode. MPPT mode performs control to maximize the solar cell output. The constant current charging mode controls constant current charging of the battery. The constant current discharge mode performs control to discharge the battery at a constant current. The constant voltage charging mode performs control to charge the battery at a constant voltage. In the constant bus voltage charging mode, control is performed to charge the battery so that the value of the bus voltage falls within a predetermined range with respect to a predetermined value. In the constant bus voltage discharge mode, control is performed to discharge the battery so that the value of the bus voltage falls within a predetermined range with respect to a predetermined value.

Here, the control unit of each bidirectional DC/DC converter controls the PWM duty ratio in each bidirectional DC/DC converter based on the control mode signal transmitted from the integrated control device 50.

FIG. 2 is a diagram showing an example of the hardware configuration of the integrated control device 50 of the power control system 1 according to the present embodiment. The integrated control device 50 includes a CPU 50a, a RAM 50b, a ROM 50c, an external memory 50d, an input section 50e, an output section 50f, and a communication section 50g. The RAM 50b, ROM 50c, external memory 50d, input section 50e, output section 50f, and communication section 50g are connected to the CPU 50a via a system bus 50h. The hardware configuration of the control section of each bidirectional DC/DC converter is also similar. Each part of the control unit of the integrated control device 50 shown in FIG. It is realized by using etc. as resources. The same applies to the control section of each bidirectional DC/DC converter.

Based on the above system configuration, an example of power control processing of a power control system according to an embodiment of the present invention will be described below.

(1) Control during sunshine mode First, an example of power control processing during sunshine mode will be described. FIG. 3 is a flowchart of power control processing in the sunshine mode of the power control system according to the present embodiment.

The integrated control device 50 instructs the first battery system 20 to enter the MTTP mode, instructs the second battery system 30 to enter the constant current charging mode or the constant current discharging mode, and controls the first control unit 211, The second control unit 311 maximizes the output of the solar cell 10 and controls the bus voltage so that it falls within a predetermined range with respect to the bus reference voltage, which is a predetermined value (S301). The predetermined value is not limited to the bus reference voltage, but may be any other suitable value.

As the charging of the second battery 330 progresses, the integrated control device 50 determines whether the voltage value of the first battery 230 has reached the first voltage value or the voltage value of the second battery 330 has reached the second voltage value. or detects that the value of the bus voltage is outside the predetermined range with respect to the bus reference voltage (S303), the integrated control device 50 controls the first battery system 20 or the second battery system 30. The first control unit 211 or the second control unit 311 controls the first battery 230 or the second battery so that the bus voltage falls within a predetermined range with respect to the bus reference voltage. The charge amount of the battery 330 is increased or decreased. That is, when the bus voltage is lower than the bus reference voltage, the amount of charge of the first battery 230 or the second battery 330 is reduced, and when the bus voltage is higher than the bus reference voltage, the amount of charge of the first battery 230 or the second battery 330 is reduced. The amount of charge of the second battery 330 is increased to control the bus voltage so that it falls within a predetermined range with respect to the bus reference voltage (S305). The battery charge amount is controlled by the integrated control device 50 when the voltage value of the first battery 230 becomes the first voltage value or the voltage value of the second battery 330 becomes the second voltage value. In place of or in addition to detecting, it is detected that the SOC value of the first battery 230 has become the first SOC value, or that the SOC value of the second battery 330 has become the second SOC value. You can go if you do.

The charging of the second battery 330 further progresses, and the integrated control device 50 determines whether the voltage value of the first battery 230 has become the third voltage value, or the voltage value of the second battery 330 has become the fourth voltage value. When detecting that (S307), the integrated control device 50 instructs the solar cell rotation mechanism 11 to rotate the solar cell 10 and adjust the angle of incidence of sunlight on the solar cell 10. (S309). At this time, the constant bus voltage charging mode control started in S305 is continued. The rotation control of the solar cell is performed when the integrated control device 50 determines whether the voltage value of the first battery 230 has become the third voltage value or the voltage value of the second battery 330 has become the fourth voltage value. In place of or in addition to detecting, it is detected that the SOC value of the first battery 230 has become the third SOC value, or that the SOC value of the second battery 330 has become the fourth SOC value. You can go if you do.

Here, when the power control system 1 is mounted on a moving body such as a spacecraft, the rotation control of the solar cell 10 is related to attitude control, so if the time interval between control timings is short, the attitude becomes unstable. Therefore, in such a case, it is preferable to increase the time interval of the rotation control timing of the solar cell 10. For example, the time interval of the rotation control timing itself may be increased, or multiple threshold levels may be set for the bus reference voltage (for example, +1V, +2V, +3V, etc. for the bus reference voltage of 50V). However, rotation control may be performed when each threshold level is reached.

Even if the output voltage of the solar cell 10 is reduced by controlling the rotation of the solar cell 10 , the integrated control device 50 determines whether the voltage value of the first battery 230 has become the fifth voltage value or the voltage value of the second battery 330 has become the fifth voltage value. When detecting that the voltage value has reached the sixth voltage value (S311), the integrated control device 50 instructs the first battery system 20 or the second battery system 30 to enter the constant voltage charging mode, and The first battery 230 and/or the second battery 330 are protected (S313).

(2) Control in shade mode Next, an example of power control processing in shade mode will be described. The integrated control device 50 instructs the first battery system 20 to perform a constant bus voltage discharge mode, instructs the second battery system 30 to perform a constant current discharge mode or a constant bus voltage discharge mode, and instructs the first battery system 20 to perform a constant bus voltage discharge mode. The battery system 20 and the second battery system 30 supply power to the bus device 40 and control the bus voltage so that it falls within a predetermined range with respect to the bus reference voltage.

According to this embodiment, the bidirectional DC/DC converter can be constructed by partially improving the battery charger that is the basic configuration of the conventional power control system. Electrical appliances can be eliminated, making it possible to significantly reduce the number of equipment. Further, while maintaining the advantage of shunt control in which the solar cells are directly connected to the bus equipment, it is possible to achieve a reduction in size and weight.

In the above embodiment, since a plurality of bidirectional DC/DC converters are connected in parallel to the solar cell 10, control interference between the bidirectional DC/DC converters may occur. Therefore, a device may be provided to reduce this control interference. Control interference reduction technology between multiple bidirectional DC/DC converters can be found, for example, in Minoru Iwasa, Hitoshi Naito, Hiromasa Soubun, “Research on spacecraft power supply system applying distributed cooperative control”, IEICE technical research report. The technology disclosed in EE Electronic Communication Energy Technology, Institute of Electronics, Information and Communication Engineers, January 21, 2016, Volume 115, No. 429, pp. 115-120, etc. can be used, and the detailed Explanation will be omitted.

In the above embodiment, the number of battery systems is two, but the number of battery systems can be one or more and any suitable number. Here, the control mode when the number of battery systems is one is MPPT mode in step 301 of the control during sunshine. However, if the value of the bus voltage is detected to be higher than the bus reference voltage, the bus voltage is set to constant charge mode, and if it is detected to be lower than the bus voltage, the bus voltage is set to constant discharge mode, and the bus voltage value is set to the specified value. When the value is detected, the MPPT mode is set again. In addition, during shade control, the bus voltage constant discharge mode is used.

In the above embodiment, a spare battery may be connected to each battery in series or in parallel. According to such a configuration, by storing surplus power, which was conventionally wasted through a shunt, in the spare battery, resistance to abnormalities and the like is improved.

In the above embodiment, the integrated control device 50 and the control section of each bidirectional DC/DC converter were configured as separate units, but part or all of the integrated control device 50 is The control unit may be included in one or more of the control units.

In the above embodiments, the bidirectional power conversion devices of all battery systems are bidirectional DC/DC converters, but the invention is not limited to this, and any other appropriate power conversion device may be used. can.

In the above embodiment, the power generation device is a solar cell, but the power generation device is not limited to this, and any other suitable power generation device can be used.

Although the present invention has been described above with reference to several embodiments for illustrative purposes, the present invention is not limited thereto, and may be modified in various forms and details without departing from the scope of the present invention. It will be apparent to those skilled in the art that variations and modifications may be made.

1 Power control system 10 Solar cell 11 Solar cell rotation mechanism 20 First battery system 30 Second battery system 40 Bus device 50 Integrated control device 210 First bidirectional DC/DC converter 310 Second bidirectional DC/DC Converter 211 First control section 311 Second control section 213 First storage section 313 Second storage section 230 First battery 330 Second battery

Claims (23)

solar cells and
bus equipment,
single battery system and
an integrated control device that controls the single battery system;
Equipped with
the bus equipment and the single battery system are directly connected in parallel to the solar cell;
the single battery system includes a bidirectional power converter and a battery;
The bidirectional power conversion device charges and discharges the battery by converting the output voltage of the solar cell and outputting it to the battery side, and converting the output voltage of the battery and outputting it to the bus device side. and
The integrated control device instructs the single battery system to perform predetermined charging and discharging control, and the single battery system controls the bus voltage of the bus device,
The integrated control device instructs the single battery system to perform an MPPT (maximum power tracking) mode, which is a control mode that maximizes solar cell output, as the predetermined charge/discharge control;
The voltage value of the battery of the single battery system has progressed to a first voltage value, the value of the bus voltage has become outside a predetermined range with respect to a predetermined value, or the voltage value of the battery of the single battery system When the SOC (rate of charge) value of the battery of the system reaches the first SOC value as charging progresses , the integrated control device controls the bus voltage with respect to the single battery system as the charge/discharge control. A power control system that instructs a constant bus voltage charging mode, which is a control mode for charging the battery so that the value of the battery is within the predetermined range with respect to the predetermined value. further including a solar cell rotation mechanism;
The integrated control device controls the output power of the solar cell and the bus voltage of the bus device by controlling charging and discharging the single battery system and controlling the rotation of the solar cell rotation mechanism. The power control system according to item 1. 3. The power control system according to claim 2, wherein the control of the bus voltage of the bus device is such that the value of the bus voltage falls within a predetermined range with respect to a predetermined value. Charging progresses in the constant bus voltage charging mode, and the voltage value of the battery of the single battery system has reached a third voltage value, or the SOC (rate of charge) value of the battery of the single battery system becomes the third SOC value, the integrated control device, as the charge/discharge control, instructs the single battery system to perform the constant bus voltage charging mode, while instructing the solar cell rotation mechanism to perform the charge/discharge control. 4. The power control system of claim 3, wherein the power control system reduces the output power of the solar cell by directing, rotating the solar cell, and adjusting an angle of incidence of sunlight on the solar cell. When charging progresses in the constant bus voltage charging mode and the voltage value of the battery of the single battery system reaches a fifth voltage value, the integrated control device performs the charging/discharging control of the single battery. The power control system according to claim 4, wherein the power control system instructs the battery system to perform a constant voltage charging mode, which is a control mode for charging the battery at a constant voltage. solar cells and
bus equipment,
multiple battery systems;
an integrated control device that controls the plurality of battery systems;
Equipped with
The bus device and the plurality of battery systems are directly connected in parallel to the solar cell,
Each of the plurality of battery systems includes a bidirectional power converter and a battery,
Each of the bidirectional power conversion devices charges the battery by converting the output voltage of the solar cell and outputting it to the battery side, and converting the output voltage of the battery and outputting it to the bus device side. perform a discharge,
The integrated control device instructs the plurality of battery systems to perform predetermined charge/discharge control, and the plurality of battery systems control bus voltages of the bus devices;
As the predetermined charge/discharge control, the integrated control device sets a first battery system among the plurality of battery systems to an MPPT (maximum power tracking) mode, which is a control mode that maximizes the solar cell output. instruct,
The voltage value of the first battery of the first battery system has progressed to the first voltage value, or the voltage value of the second battery of the second battery system of the plurality of battery systems has been charged . has progressed to a second voltage value, or the value of the bus voltage is outside a predetermined range with respect to a predetermined value, or the SOC (rate of charge) value of the first battery of the first battery system is If the SOC value of the second battery of the second battery system advances to the first SOC value, or if the SOC value of the second battery of the second battery system reaches the second SOC value as the charging progresses , the integrated control device controls the charging/discharging control. , the first battery system or the second battery system is in a control mode in which the battery is charged so that the value of the bus voltage falls within the predetermined range with respect to the predetermined value. A power control system that directs constant voltage charging mode. further including a solar cell rotation mechanism;
The integrated control device controls the output power of the solar cell and the bus voltage of the bus device by controlling the charging and discharging of the plurality of battery systems and controlling the rotation of the solar cell rotation mechanism. 6. The power control system according to 6. 8. The power control system according to claim 7, wherein the control of the bus voltage of the bus device is such that the value of the bus voltage is within a predetermined range with respect to a predetermined value. Whether charging progresses in the constant bus voltage charging mode, and the voltage value of the first battery has become the third voltage value, or the voltage value of the second battery has become the fourth voltage value, or whether the voltage value of the first battery has become the fourth voltage value, the SOC (rate of charge) value of a first battery of said battery system has become a third SOC value, or the SOC value of a second battery of said second battery system has become a fourth SOC value. In this case, as the charging /discharging control, the integrated control device instructs the first battery system or the second battery system to perform the constant bus voltage charging mode, and also instructs the solar cell rotation mechanism. 9. The power control system according to claim 8, wherein the output power of the solar cell is reduced by rotating the solar cell and adjusting an angle of incidence of sunlight on the solar cell. When charging progresses in the constant bus voltage charging mode and the voltage value of the first battery becomes a fifth voltage value or the voltage value of the second battery becomes a sixth voltage value, 10. The power control system according to claim 9, wherein the integrated control device instructs the first battery system to perform constant voltage charging mode, which is a control mode for charging the battery at a constant voltage, as the charge/discharge control. During the shade mode, the integrated control device controls the first battery system to control the battery so that the value of the bus voltage falls within the predetermined range with respect to the predetermined value. The power control system according to any one of claims 6 to 10, which instructs a constant bus voltage discharge mode, which is a control mode for discharging. During the shade mode, the integrated control device controls the charging and discharging of the single battery system so that the value of the bus voltage falls within the predetermined range with respect to the predetermined value. The power control system according to any one of claims 1 to 5, which instructs a constant bus voltage discharge mode, which is a control mode for discharging. a power generator;
bus equipment,
single battery system and
an integrated control device that controls the single battery system;
Equipped with
the bus equipment and the single battery system are directly connected in parallel to the power generation device;
the single battery system includes a bidirectional power converter and a battery;
The bidirectional power conversion device converts the output voltage of the power generation device and outputs it to the battery side, and converts the output voltage of the battery and outputs it to the bus device side, thereby charging and discharging the battery. conduct,
The integrated control device instructs the single battery system to perform predetermined charging and discharging control, and the single battery system controls the bus voltage of the bus device,
The control of the bus voltage of the bus device is a control such that the value of the bus voltage falls within a predetermined range with respect to a predetermined value,
The voltage value of the battery of the single battery system has progressed to a first voltage value, the value of the bus voltage has become outside the predetermined range with respect to the predetermined value, or the voltage value of the battery of the single battery system has reached the first voltage value, When the SOC (charging rate) value of the battery of one battery system reaches the first SOC value as charging progresses , the integrated control device performs the charge/discharge control on the single battery system. instructing a constant bus voltage charging mode, which is a control mode for charging the battery so that the value of the bus voltage falls within the predetermined range with respect to the predetermined value;
When charging progresses in the constant bus voltage charging mode and the voltage value of the battery of the single battery system reaches a fifth voltage value, the integrated control device performs the charging/discharging control of the single battery. A power control system that instructs a battery system to perform a constant voltage charging mode, which is a control mode for charging the battery at a constant voltage. a power generator;
bus equipment,
multiple battery systems;
an integrated control device that controls the plurality of battery systems;
Equipped with
The bus equipment and the plurality of battery systems are directly connected in parallel to the power generation device,
Each of the plurality of battery systems includes a bidirectional power converter and a battery,
Each of the bidirectional power conversion devices charges the battery by converting the output voltage of the power generation device and outputting it to the battery side, and converting the output voltage of the battery and outputting it to the bus device side. perform a discharge,
The integrated control device instructs the plurality of battery systems to perform predetermined charge/discharge control, and the plurality of battery systems control bus voltages of the bus devices;
The control of the bus voltage of the bus device is a control such that the value of the bus voltage falls within a predetermined range with respect to a predetermined value,
The voltage value of the first battery of the first battery system among the plurality of battery systems has progressed to the first voltage value, or the voltage value of the first battery of the second battery system among the plurality of battery systems has reached the first voltage value. The voltage value of the first battery of the first battery system has become a second voltage value due to progress of charging , the value of the bus voltage has become outside the predetermined range with respect to the predetermined value, or the voltage value of the first battery of the first battery system If the SOC (rate of charge) value of the battery becomes a first SOC value as charging progresses , or if the SOC value of the second battery of the second battery system becomes a second SOC value as charging progresses , As the charge/discharge control, the integrated control device controls the first battery system or the second battery system so that the value of the bus voltage falls within the predetermined range with respect to the predetermined value. Instructs constant bus voltage charging mode, which is a control mode for charging the battery, to
When charging progresses in the constant bus voltage charging mode and the voltage value of the first battery becomes a fifth voltage value or the voltage value of the second battery becomes a sixth voltage value, The integrated control device is a power control system that instructs the first battery system or the second battery system to perform a constant voltage charging mode, which is a control mode for charging a battery at a constant voltage, as the charge/discharge control. Also equipped with a spare battery,
15. The power control system according to claim 6 , wherein the spare battery is connected in series or parallel to the first battery. Also equipped with a spare battery,
14. The power control system according to claim 1, wherein the spare battery is connected in series or parallel to the single battery. The power control system according to any one of claims 1 to 16 , wherein the bidirectional power conversion device is a bidirectional DC/DC converter. solar cells and
bus equipment,
single battery system and
an integrated control device that controls the single battery system;
Equipped with
the bus equipment and the single battery system are directly connected in parallel to the solar cell;
the single battery system includes a bidirectional power converter and a battery;
The bidirectional power conversion device converts the output voltage of the solar cell and outputs it to the battery side, and converts the output voltage of the battery and outputs it to the bus device side, thereby charging and discharging the battery. conduct,
A power control method in a power control system, comprising:
The integrated control device instructs the single battery system to perform predetermined charging and discharging control, and the single battery system controls the bus voltage of the bus device,
The integrated control device instructs the single battery system to perform MPPT mode, which is a control mode that maximizes solar cell output, as the predetermined charge/discharge control;
The voltage value of the battery of the single battery system has progressed to a first voltage value, the value of the bus voltage has become outside a predetermined range with respect to a predetermined value, or the voltage value of the battery of the single battery system When the SOC (rate of charge) value of the battery of the system reaches the first SOC value as charging progresses , the integrated control device controls the bus voltage with respect to the single battery system as the charge/discharge control. A power control method that instructs a constant bus voltage charging mode, which is a control mode for charging a battery so that the value of the battery is within the predetermined range with respect to the predetermined value. solar cells and
bus equipment,
multiple battery systems;
an integrated control device that controls the plurality of battery systems;
Equipped with
The bus device and the plurality of battery systems are directly connected in parallel to the solar cell,
Each of the plurality of battery systems includes a bidirectional power converter and a battery,
Each of the bidirectional power conversion devices charges the battery by converting the output voltage of the solar cell and outputting it to the battery side, and converting the output voltage of the battery and outputting it to the bus device side. perform a discharge,
A power control method in a power control system, comprising:
The integrated control device instructs the plurality of battery systems to perform predetermined charge/discharge control, and the plurality of battery systems control bus voltages of the bus devices;
The integrated control device instructs a first battery system of the plurality of battery systems to perform an MPPT mode, which is a control mode that maximizes solar cell output, as the predetermined charge/discharge control;
The voltage value of the first battery of the first battery system has progressed to the first voltage value, or the voltage value of the second battery of the second battery system of the plurality of battery systems has been charged . has progressed to a second voltage value, or the value of the bus voltage is outside a predetermined range with respect to a predetermined value, or the SOC (rate of charge) value of the first battery of the first battery system is If the SOC value of the second battery of the second battery system advances to the first SOC value, or if the SOC value of the second battery of the second battery system reaches the second SOC value as the charging progresses , the integrated control device controls the charging/discharging control. , the first battery system or the second battery system is in a control mode in which the battery is charged so that the value of the bus voltage falls within the predetermined range with respect to the predetermined value. A power control method that directs constant voltage charging mode. a power generator;
bus equipment,
single battery system and
an integrated control device that controls the single battery system;
Equipped with
the bus equipment and the single battery system are directly connected in parallel to the power generation device;
the single battery system includes a bidirectional power converter and a battery;
The bidirectional power conversion device converts the output voltage of the power generation device and outputs it to the battery side, and converts the output voltage of the battery and outputs it to the bus device side, thereby charging and discharging the battery. conduct,
A power control method in a power control system, comprising:
The integrated control device instructs the single battery system to perform predetermined charging and discharging control, and the single battery system controls the bus voltage of the bus device,
The control of the bus voltage of the bus device is a control such that the value of the bus voltage falls within a predetermined range with respect to a predetermined value,
The voltage value of the battery of the single battery system has progressed to a first voltage value, the value of the bus voltage has become outside the predetermined range with respect to the predetermined value, or the voltage value of the battery of the single battery system has reached the first voltage value, When the SOC (charging rate) value of the battery of one battery system reaches the first SOC value as charging progresses , the integrated control device performs the charge/discharge control on the single battery system. instructing a constant bus voltage charging mode, which is a control mode for charging the battery so that the value of the bus voltage falls within the predetermined range with respect to the predetermined value;
When charging progresses in the constant bus voltage charging mode and the voltage value of the battery of the single battery system reaches a fifth voltage value, the integrated control device performs the charging/discharging control of the single battery. A power control method for instructing a battery system to perform a constant voltage charging mode, which is a control mode for charging the battery at a constant voltage. a power generator;
bus equipment,
multiple battery systems;
an integrated control device that controls the plurality of battery systems;
Equipped with
The bus equipment and the plurality of battery systems are directly connected in parallel to the power generation device,
Each of the plurality of battery systems includes a bidirectional power converter and a battery,
Each of the bidirectional power conversion devices charges the battery by converting the output voltage of the power generation device and outputting it to the battery side, and converting the output voltage of the battery and outputting it to the bus device side. perform a discharge,
A power control method in a power control system, comprising:
The integrated control device instructs the plurality of battery systems to perform predetermined charge/discharge control, and the plurality of battery systems control bus voltages of the bus devices;
The control of the bus voltage of the bus device is a control such that the value of the bus voltage falls within a predetermined range with respect to a predetermined value,
The voltage value of the first battery of the first battery system among the plurality of battery systems has progressed to the first voltage value, or the voltage value of the first battery of the second battery system among the plurality of battery systems has reached the first voltage value. The voltage value of the first battery of the first battery system has become a second voltage value due to progress of charging , the value of the bus voltage has become outside the predetermined range with respect to the predetermined value, or the voltage value of the first battery of the first battery system If the SOC (rate of charge) value of the battery becomes a first SOC value as charging progresses , or if the SOC value of the second battery of the second battery system becomes a second SOC value as charging progresses , As the charge/discharge control, the integrated control device controls the first battery system or the second battery system so that the value of the bus voltage falls within the predetermined range with respect to the predetermined value. Instructs constant bus voltage charging mode, which is a control mode for charging the battery, to
When charging progresses in the constant bus voltage charging mode and the voltage value of the first battery becomes a fifth voltage value or the voltage value of the second battery becomes a sixth voltage value, In the power control method, the integrated control device instructs the first battery system or the second battery system to perform a constant voltage charging mode, which is a control mode for charging a battery at a constant voltage, as the charging/discharging control. A program for causing a computer to execute the power control method according to claim 18 . A computer-readable storage medium storing the program according to claim 22 .

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