JP7097869B2 - Power supply equipment using renewable energy - Google Patents

Description

The present invention relates to a power supply facility for supplying stable power using renewable energy such as solar power generation.

Conventionally, small-scale energy networks with consuming facilities, so-called microgrids, have been put into practical use by decentralizing natural energy supply sources such as solar power generation and wind power generation.

In such facilities, output fluctuations due to climate change of the renewable energy supply source adversely affect the interconnected power system, so in order to compensate for the above output fluctuations, a power storage device is installed to charge and discharge. Fluctuations in supply output are suppressed (Patent Document 1).

Japanese Unexamined Patent Publication No. 2001-327080

By the way, in the above-mentioned conventional distributed power supply system, the output target value is set to gradually increase as the amount of electricity stored in the power storage device increases, and the output value of the renewable energy supply source exceeds the output target value. Outputs the output target value, charges the power storage device with the excess, the storage amount of the power storage device becomes large, the output target value becomes large, and the output value of the renewable energy supply source becomes the output target value. If it is less than the above, the whole is output and the amount short of the output target value is supplemented by the discharge of the power storage facility.

Therefore, there is a problem that the output value of the distributed power supply system becomes stepped with time, and for example, it cannot meet the demand for supplying a constant power supply during a long time in the daytime.

In addition, when the amount of electricity stored decreases due to bad weather or the like and discharge becomes impossible, it is assumed that the generated power is output as it is and the stable supply of power cannot be maintained.

The present invention has been made in view of the above-mentioned conventional problems, and provides renewable energy capable of stably supplying electric power requested by a customer for a long time in the daytime while using renewable energy. The purpose is to provide the power supply equipment used.

Another object of the present invention is to provide a power supply facility using renewable energy that realizes a stable supply of power by renewable energy at all times by alternately using one system and two power facilities.

In order to achieve the above object, the present invention
First, a conversion device that converts the power generated from a power generation device using renewable energy into a constant power every hour, a power storage device that charges and discharges the generated power, the conversion device, and / or the power storage. Power supply equipment consisting of a grid interconnection conversion device that converts the output power from the device into AC and outputs it to the existing AC wiring is provided separately for 1 system and 2 systems, respectively, and the above 1 system and the above 2 systems are provided. It is configured so that the total power can be supplied to the existing AC wiring, receives data on generated power from each of the above 1 system and the above 2 systems of power supply equipment, and transmits a control command to each of the above power supply equipment. The monitoring control device and the data regarding the generated power of the one system are transmitted to the monitoring control device, and the control command for the one system is received from the monitoring control device based on the control command . A control device for one system for controlling the output power of the one system is provided, data on the generated power of the two systems is transmitted to the monitoring control device, and the control command for the two systems from the monitoring control device is issued. Two control devices are provided to receive and control the output power of the two systems based on the control command. The monitoring control device divides the required supply power into two, and the division in charge of the one system. The power after division and the power after division in charge of the above two systems, which are lower than the power after division in charge of the one system, are set, and the power after each division is distributed to the above one system and the above two systems, respectively. The power after the division is assigned to the power supply equipment of each system, and the power after the division of the one system of the power supply equipment of the one system and the power after the division of the two systems of the power supply equipment of the two systems are performed. By giving the control command to the control device of each system so that the total power of the above is supplied to the existing AC wiring, it is configured to satisfy the required supply power, and the control of the one system is performed. Based on the control command for the one system of the monitoring and control device, the device controls the power generation equipment of the one system so that the output of the power supply facility of the one system becomes the power after the division of the one system. If the output power of the power generation device of the above 1 system is less than the power after the division of the 1 system, the output of the power supply facility of the 1 system can be increased by discharging the power storage device of the 1 system. The power is controlled so as to be the power after division, and the output of the power supply equipment of the two systems is the output of the two systems based on the control command for the two systems of the monitoring control device. It becomes the power after the division of As described above, the two power generation devices are controlled, and when the output power of the two power generation devices exceeds the divided power of the two systems, the two power storage devices are charged. The monitoring and control device controls the power storage device of the above, and the monitoring and control device controls the control command for the above one system and the control command for the above two systems to be exchanged every day by a power supply facility using renewable energy. It is composed.

The power generation equipment of the above 1 system and 2 systems can be, for example, a photovoltaic power generation array (1a to 1d, 1 system 1a, 1b, 2 systems 1c, 1d). The conversion device can be, for example, a PV converter (36a, 36b). The one-system and two-system power storage devices can be, for example, a storage battery (14a, 14b) such as a lead battery and a battery controller (13a, 13b). The grid interconnection converter of the above 1 system and 2 systems can be, for example, a grid interconnection inverter (15a, 15b). The one-system and two-system control devices can be configured by, for example, a smart meter (18a, 18b) and a smart power manager (SPM) (21a, 21b). The data related to the generated power received by the monitoring control device is, for example, the generated power data of the power generation equipment of 1 system and 2 systems, the remaining amount data of the power storage device of 1 system and 2 systems, and the grid interconnection conversion of 1 system and 2 systems. It refers to data related to the output power of the device. With this configuration, the required power supply (for example, 200 [kW]) can be distributed to the power supply equipment of one system and two systems, and the other system (for example, one system) can be assigned the power supply. The target value (power after division of one system, for example 150 [kW]) is set high and the amount of electricity stored is small, and the target value of power supply (power after division of two systems) is set for one system (for example, two systems). For example, by setting a low power storage amount of 50 [kw]) and exchanging such distribution every day, the power supply equipment side of the system with a large power storage amount is always set, and the target of the power supply is the next day. Since it can be set to the higher value, there is no problem even if a large amount of power is discharged from the power storage device in the power supply facility with a high target value of the power supply due to bad weather. It will be possible to respond.

Secondly, the monitoring and control device sets the power after the division of the two systems to be lower than the power after the division of the power supply equipment of the one system in the power supply equipment of the two systems. Therefore, the renewable energy according to the first description is used, which is configured so that a larger capacity is stored in the two power storage devices as compared with the storage amount of the power storage device in the one system. It consists of the existing power supply equipment.

With this configuration, by switching the 1st and 2nd systems, the power supply equipment side of the system with a large amount of electricity storage is always set to the one with the higher target value of the power supply the next day. Therefore, even if a large amount of discharge from the power storage device is required in a power supply facility having a high target value of power supply due to bad weather or the like, it is possible to deal with it without any problem.

Thirdly, in the power supply facility of the one system, the monitoring control device sets the divided power of the one system within the range of 85% to 65% of the required power supply, and the two systems. In the power supply facility of the above, the power after the division of the above two systems is set within the range of 15% to 35% of the required power supply. It consists of supply equipment.

With this configuration, for example, in one system of power supply equipment, the power after division of one system is set high, the amount of charge to one system of power storage device is set low, and in two systems of power supply equipment, 2 The power after division of the system can be set low, and the amount of charge to the power storage device of the two systems can be set large. By exchanging the control of the one system and the two systems every day, the renewable energy can be reduced. Stable power supply can be performed while using the power generation equipment used.

Fourth, the monitoring and control device includes a data receiving means for wirelessly receiving data related to generated power from the power supply equipment and a data transmitting means for wirelessly transmitting various control commands to the power supply equipment. The control devices of the 1st system and the 2nd system are provided in the respective power supply facilities, respectively, and receive data on the generated power from the smart meters provided in the respective systems, and are used in the monitoring control device. It is composed of the power supply equipment using the renewable energy according to any one of 1 to 3 above, which is provided with a data transmission means for wireless transmission.

With this configuration, by wirelessly connecting the power supply equipment including the control devices of 1 system and 2 systems and the monitoring control device, the monitoring control device can be installed in a place away from the power supply equipment according to the present invention. It can be installed, and operation control and monitoring control of power supply equipment can be performed from a remote location. Therefore, for example, the power supply equipment of the present invention can be relatively easily installed in a distributed power source using a microgrid already provided on a remote island or the like.

Fifth, the monitoring and control device sets a plurality of target values of the power generated by the power generation device of the one system for each hour for the one system, and the power of the plurality of target values of the one system is the power of the above. A power level setting means that sets the same power value as the power after division of one system as the maximum target value, and sets the other target values as lower target values than the power after division of one system, and power generation of the above one system. By comparing the comparison means for determining whether or not the generated power of the device is higher than the maximum target value, which is the power after the division of the one system, and the comparison means, the generated power is the power after the division of the one system. When the power is higher than the power, the power generation amount command means for sending a control command to the control device of the one system so as to output the power of the maximum target value, and the power exceeding the maximum target value of the one system The power generation amount command means is provided with a charge / discharge command means for sending a control command for charging the power storage device, and when the generated power is lower than the divided power of the one system by comparison of the comparison means, the power generation amount command means is provided. A control command is sent to the control device of the one system so as to output the target value lower than the power after the division, and the charge / discharge command means is after the division of the one system from the low target value. A control command is sent to the control device of the one system so as to satisfy the power after the division of one system by compensating for the shortage of power up to the power by the discharge from the power storage device. , Comparison between the power level setting means for setting the power after division of the two systems to the target value of the two systems and determining whether the generated power of the power generation equipment of the two systems is higher than the target value of the two systems. By comparing the means and the comparison means, when the generated power of the two systems of power generation equipment is higher than the target value of the above two systems, the control device of the above two systems is output so as to output the power after the division of the above two systems. If the power generated by the two power generation devices exceeds the target value of the two systems by comparing the power generation amount commanding means that sends the control command to the above two systems and the comparison means, the excess power is stored in the two systems. The above-mentioned 1st to 4th are provided with a charge / discharge command means for sending a control command to charge the device, and the above-mentioned monitoring control device replaces the above-mentioned control operations of the above 1 system and the above 2 systems every day. It is composed of a power supply facility using the renewable energy described in any of the above.

The plurality of target values in the above one system are, for example, target values (S1, S2, S3, S4). Further, the maximum target value is, for example, S2 (for example, 150 [kW]) which is the same as the electric power after division of one system. The target value lower than the power after the division of the one system is, for example, the target value (S1, S3, S4). The shortage of electric power is, for example, electric power (S2-S1 = S1', S2-S3 = S3', S2-S4 = S4'). The target value of the above two systems is, for example, the target value (S5), which is the same as the power after division of the two systems (for example, 50 [kW]). With this configuration, if the generated power of one system is lower than the power generated by one system in one system, the shortage of power is supplemented by the discharge from the power storage device of one system, and after the division of one system. (Constant value, for example, S2) can be supplied, and in the two systems, the amount of electricity stored in the two systems of power storage devices can be increased. Can be stably supplied to the existing AC wiring.

Sixth, the control device of the one system is a determination means for determining whether the control command from the monitoring control device is a charge command or a discharge command, and when the determination of the determination means is a discharge command, the control device is the one system. The power generation amount control means for controlling the power generation equipment of the above to output a target value lower than the power after the division, and the charge for controlling the shortage of the power to be supplemented by the discharge from the one system of power storage devices. It is equipped with a discharge control means, whereby the power after division of the one system consisting of the sum of the power having the low target value and the power shortage due to the discharge is output from the grid interconnection conversion device of the one system. When the judgment of the determination means is a charging command, the power generation amount control means controls the power generation equipment of the one system to output the divided power of the one system. As a result, the power after the division of the one system is output from the grid interconnection conversion device of the one system, and the charge / discharge control means is described for the power exceeding the power after the division of the one system. One system of power storage devices is controlled to be charged, and the above two systems of control devices are a determination means for determining whether the control command from the monitoring control device is a charge command or a discharge command, and the determination means. In the case of the above-mentioned charge command, the power generation amount control means for controlling the power generation equipment of the above two systems to output the power after the division of the two systems and the power after the division of the two systems are exceeded. The power is provided with a charge / discharge control means for controlling the charging of the two power storage devices, whereby the power after the division of the two systems is output from the system interconnection conversion device of the two systems. The control device of the above 1 system and the above 2 systems replaces the control operation of the above 1 system and the above 2 systems every day by the above control command from the monitoring control device. It is composed of power supply equipment using the renewable energy of.

The target value lower than the power after division (target value S2, for example, 150 [kW]) in the above one system means, for example, the target value (S1, S3, S4). The shortage of electric power is, for example, electric power (S2-S1 = S1', S2-S3 = S3', S2-S4 = S4'). The electric power after the division of the above two systems is, for example, 50 [kW]. With this configuration, if the generated power of one system is lower than the power generated by one system in one system, the shortage of power is supplemented by the discharge from the power storage device of one system, and after the division of one system. (Constant value, for example, S2) can be supplied, and in the two systems, the amount of electricity stored in the two systems of power storage devices can be increased. Can be stably supplied to the existing AC wiring.

Seventh, a charging device for an electric vehicle is connected to the existing AC wiring, and a smart meter capable of communicating with the monitoring and control device is provided. The monitoring and control device is used for the electric vehicle via the smart meter. The description in any one of 1 to 6 above, which increases the output power of the power supply facility in charge of the lower divided power upon receiving the charging start information of the charging device only during the charging period. It consists of power supply facilities that use renewable energy.

With this configuration, the power supply equipment of the system with the lower target value is used, so the capacity of the storage battery is abundant, so the power stored in the storage battery can be effectively used for charging the electric vehicle. can.

According to the present invention, the required power supply can be distributed to the power supply equipment of one system and two systems, and the other system can set the target value of the power supply to be high and the storage amount to be small. One system has a low target value for power supply and a large amount of electricity stored, and by exchanging such distribution every day, the power supply equipment side of the system with a large amount of electricity is always supplied the next day. Since it can be set to the higher target value of electric power, even if a large amount of power is discharged from the power storage device in a power supply facility with a high target value of power supply due to bad weather or the like. , It is possible to respond without any trouble.

In addition, by performing the replacement operation, the power supply equipment side of the system with a large amount of electricity stored can be set to the one with the higher target value of the supplied power the next day, so that it is supplied due to bad weather or the like. Even if a large amount of discharge from the power storage device is required in a power supply facility with a high power target value, it is possible to handle it without any problem.

Further, by wirelessly connecting the power supply equipment including the control devices of one system and the control device and the monitoring control device, the monitoring control device can be installed at a place away from the power supply equipment according to the present invention. It is possible to control the operation of power supply equipment and monitor control from a remote location. Therefore, for example, the power supply equipment of the present invention can be relatively easily installed in a distributed power source using a microgrid already provided on a remote island or the like.

In addition, since the power supply equipment of the system with the lower target value is used for charging the electric vehicle, the capacity of the storage battery is abundant, so the power stored in the storage battery is effectively used for charging the electric vehicle. be able to.

It is a wiring diagram of the power supply equipment using the renewable energy which concerns on this invention. Same as above It is an electric block diagram including a control system of a power supply facility. Same as above It is a flowchart which shows the control operation of the monitoring control device of a power supply facility. Same as above It is a block diagram for explaining the operation of the power supply equipment. Same as above It is a block diagram which shows the control system of a power supply facility. It is a block diagram which shows the 2nd Embodiment of the said power supply facility. Same as above It is a block diagram for demonstrating the operation of the 2nd Embodiment of the power supply equipment. Same as above It is a block diagram of SPM of one system of a power supply facility. Same as above It is a block diagram of two SPMs of a power supply facility. Same as above It is a block diagram of EMS of the power supply equipment. Same as above. It is a flowchart of EMS of one system of a power supply facility. Same as above. It is a flowchart of EMS of two systems of a power supply facility. Same as above It is a flowchart of EMS of the power supply equipment. (A) to (c) are all diagrams showing the stored data of the data storage unit of EMS. Same as above It is a flowchart of SPM of one system of a power supply facility. Same as above It is a flowchart of two systems of SPM of a power supply facility. Same as above, it is a block diagram of a PV converter of a power supply facility, where (a) shows one system and (b) shows two systems. Same as above, it is a block diagram of the battery controller of the power supply equipment, (a) shows one system, (b) shows two systems. Same as above It is a functional block diagram of one system of the monitoring control device of the power supply equipment. Same as above. It is a functional block diagram of two systems of a monitoring control device of a power supply facility. Same as above. It is a functional block diagram of one system of SPM of a power supply facility. Same as above. It is a functional block diagram of two systems of SPM of a power supply facility.

Hereinafter, the power supply equipment using renewable energy according to the present invention will be described in detail.

(First Embodiment)
FIG. 1 shows the overall configuration of a power supply facility using renewable energy according to the present invention.

In the figure, what is indicated by a broken line is an existing power generation facility using the solar power generation arrays 1a to 1d, and each of the solar power generation arrays 1a to 1d having a plurality of solar power generation panels has an output of 100 [kW]. Have. Each of the solar power generation arrays 1a to 1d is connected to the AC wiring 3 via a power conditioner (hereinafter referred to as “PCS”) 2a to 2d, and is connected to the distribution transformer 4 and the output AC wiring (existing AC wiring) 5. It is connected to an external microgrid power source 6 via. The output of each of the solar power generation arrays 1a to 1d is 100 [kW], and the DC to the AC 380V is converted and stabilized by the PCS2a to 2d, and the AC wiring 3 of the three-phase four-wire 380V is used. It is boosted by the distribution transformer 4 and supplied to the external microgrid power supply 6 via the AC wiring 5.

Reference numeral 7 is an existing storage battery (Panadium redox, capacity 500 [kWh]), 7a and 7b are inverters (battery controllers) for the storage battery 7, and 8 is a distribution transformer. The storage battery 7 stores power exceeding the output target value when the output power (power generation amount) exceeds the output target value according to the output target value of the existing power generation facility, and when the output power is lower than the output target value. Performs an operation of discharging and maintaining the output power of the output target value.

The following configuration according to the present invention is added to the existing power generation facility.
The new DC wirings 10a to 10d are connected to the output DC wirings of the four existing photovoltaic power generation arrays 1a to 1d via the changeover switches 9a to 9d to correspond to the two photovoltaic power generation arrays 1a and 1b. The new wirings 10a and 10b are connected to the two PV converters (DC / DC converters) 11a and 11b (see FIG. 17A) without going through the PCS2a and 2b, and are connected to the DC380V line 12 which is a DC power supply line. do. The PV converters 11a and 11b are so-called switching regulators, which convert the DC voltage generated by the plurality of photovoltaic power generation modules of the photovoltaic power generation arrays 1a and 1b into 380V and output the DC voltage to the DC380V line 12. ..

Similarly, the new DC wirings 10c and 10d are connected via the changeover switches 9c and 9d, and the new wirings 10c and 10d corresponding to the two solar power generation arrays 1c and 1d are not passed through the PCS2c and 2d. It is connected to two PV converters (DC / DC converters) 11c and 11d (see FIG. 17B), and is connected to a DC380V line 12 which is a DC feeding line. The PV converters 11c and 11d are so-called switching regulators, and at the same time, the DC voltage generated by the plurality of photovoltaic power generation modules of the photovoltaic power generation arrays 1c and 1d is converted into 380V and output to the DC380V line 12. be.

A battery controller 13a (see FIG. 18A) is connected to the DC380V line 12a corresponding to the solar arrays 1a and 1b to the DC380V line 12, and a lead storage battery 14a (capacity 576 [kWh]) is connected to the battery controller 13a. ) Is connected. Further, the battery controller 13b is connected to the DC380V line 12b corresponding to the solar arrays 1c and 1d, and the lead storage battery 14b (capacity 576 [kWh]) is connected to the battery controller 13b (see FIG. 18B). There is. Each of the battery controllers 13a and 13b performs a charge / discharge operation on each of the storage batteries 14a and 14b based on a control command of a monitoring control device (energy management system, hereinafter referred to as "EMS") 19 described later.

The DC380V line 12a is connected to a grid interconnection inverter 15a (50 [kw] × 3), and the DC of DC380V is converted into AC (three-phase four-wire 220V) by the inverter 15a, and the DC is converted to AC (three-phase four-wire 220V) via the AC switching switchboard 16a. It is connected to the new AC wiring 17 and is connected to the existing AC wiring 3 via the new wiring 17. The DC380V line 12b is connected to a grid-linked inverter 15b (50 [kW] × 3), and the DC of DC380V is converted to AC (3-phase 4-wire 220V) by the inverter, and the new DC 380V line is converted to AC (3-phase 4-wire 220V) via the AC switching switchboard 16b. It is connected to the AC wiring 17 and similarly connected to the existing AC wiring 3 via the new wiring 17.

Here, the power supply facility including the photovoltaic power generation arrays 1a, 1b, PV converters 11a, 11b, DC380V line 12a, the system cooperation inverter 15a, and the battery controller 13a and the storage battery 14a connected to the system cooperation inverter 15a is referred to as "1 system". The power supply facility including the solar array 1c, 1d, PV converter 11c, 11d, DC380V line 12b, the system cooperation inverter 15b, the battery controller 13b connected to the system cooperation inverter 15b, and the storage battery 14b is referred to as "two systems".

FIG. 2 shows an electrical block diagram (including a control system) of the power generation facility according to the present invention.
In the figure, 18a is a smart meter of one system, and the generated power of the solar power generation arrays 1a and 1b (the generated power of points a in FIGS. 1 and 2) and the battery remaining amount measuring device (battery monitoring unit, hereinafter “ BMU ") Battery remaining amount (capacity [kwh], remaining amount at point b in FIG. 2), which is a measured value of 22a) Data on the output side of the grid interconnection inverter 15a of one system (AC data at point c, That is, the power generation amount [kwh] and / or the instantaneous power generation power [kw], the power generation voltage [V], the current value [A], the frequency [Hz], the power factor [cosθ], etc. of one system) are detected. It wirelessly transmits to the smart power manager 21a (hereinafter referred to as "SPM21a") described later.

The SPM 21a wirelessly transmits various data of the one system acquired by the smart meter 18a to a monitoring control device (energy management system, hereinafter referred to as "EMS") 19. Further, the SPM 21a wirelessly receives various control commands from the EMS 19 to control the AC output (generated power) of the grid interconnection inverter 15a of the one system, and also charges the lead storage battery 14a via the battery controller 13a. It controls the discharge.

Similarly, 18b is a two-system smart meter, and the generated power of the photovoltaic power generation arrays 1c and 1d (generated power at point a'in FIGS. 1 and 2) and the remaining battery level (capacity) measured by the BMU 22b. [Kwh], the remaining amount of the b'point in FIG. 2, the data on the output side of the two systems of the system cooperation inverter 15b (the AC data of the c'point, that is, the power generation amount of one system [kwh] and / or Instantaneous power generation power [kw], power generation voltage [V], current value [A], frequency [Hz], power factor [cosθ], etc.) are detected and wirelessly transmitted to the SPM21b.

The SPM 21b wirelessly transmits various data of the two systems acquired by the smart meter 18b to the EMS 19. Further, the SPM 21b wirelessly receives various control commands from the EMS 19 to control the AC output (generated power) of the two grid interconnection inverters 15b, and also charges the lead storage battery 14b via the battery controller 13b. It controls the discharge.

The smart meter controller 23 (hereinafter referred to as “SMC”) wirelessly receives a control command from the EMS 19 to the smart meters 18a and 18b, controls the smart meters 18a and 18b by wireless signals, and also receives a control command from the EMS 19 to the smart meters 18a and 18b. The control command to the SPMs 21a and 21b of each system is wirelessly received, and the control command is wirelessly transmitted to the SPMs 21a and 21b.

The control of the power supply equipment using the renewable energy according to the present invention will be described.

FIG. 2 shows a newly installed wiring diagram of FIG. 1 with a control unit for performing various controls and data communication buses 20a and 20b added.

In the above one system, the SPM 21a controls the battery controller 13a based on the control command from the EMS 19 to charge and discharge the storage battery 14a, whereby the power generated by the photovoltaic power generation arrays 1a and 1b fluctuates. Is controlled so that the divided power is output from one other power supply facility, such as an operation for constantly smoothing the power to a target value (S1 to S4, see FIG. 4) at predetermined time intervals. The communication bus 20a is connected to the grid interconnection inverter 15a, the BMU 22a, the battery controller 13a, and the PV converters 11a and 11b.

The SPM 21a (see FIG. 8) is a program storage unit 32a that stores a program of the operation procedure shown in FIGS. 15 and 16 described later, a CPU 32b that performs various controls according to the program, and temporarily stores various data in the operation process of the program. A data storage unit 32c for storing data, a communication unit 32d for communicating with the smart meter 18a or the EMS 19, and these devices are connected via a communication bus 32. Reference numeral 33 denotes a wireless transceiver for communicating with the smart meters 18a and EMS19. Further, the communication bus 32 is connected to the grid interconnection inverter 15a, the BMU 22a, and the battery controller 13a by the communication bus 20a through the I / O 32e.

The BMU22a is a device capable of detecting the remaining amount of the storage battery 14a, and in the case of a secondary battery such as the lead storage battery, the charge / discharge characteristics and the internal resistance of the used secondary battery are measured in advance. The electromotive force can be calculated by measuring the terminal voltage and current of the next battery, and the stored amount of the storage battery can be obtained from the charge / discharge characteristics. Therefore, it is possible to detect the remaining amount of the battery by detecting the amount of electricity stored in the fully charged battery in advance and subtracting the amount of electricity stored in the fully charged battery from the amount of electricity stored in the fully charged battery. The BMU22a constantly transmits the battery remaining amount data to the SPM21a and the EMS19 by wireless or wire.

The same configuration is used in the above two systems (see FIG. 2), and the SPM 21b is charged and discharged from the storage battery 14b via the battery controller 13b based on the control command from the EMS 19 to generate sunlight. Outputs the split power from the other two power supply facilities, such as the operation to constantly smooth the fluctuation of the generated power by the power generation arrays 1c and 1d to the target value (see FIGS. 4 and S5) at predetermined time intervals. The communication bus 20b is connected to the interconnection inverter 15b, the BMU 22b, the battery controller 13b, and the PV converters 11c and 11d.

The SPM21b (see FIG. 9) is a program storage unit 33a that stores a program of the operation procedure shown in FIGS. 15 and 16 described later, a CPU 33b that performs various controls according to the program, and temporarily stores various data in the operation process of the program. A data storage unit 33c for storing data, a communication unit 33d for communicating with the smart meter 18b or the EMS 19, and these devices are connected via a communication bus 33'. Reference numeral 34 is a wireless transceiver for communicating with the smart meter 18b and the EMS 19. Further, the communication bus 33'is connected to the grid interconnection inverter 15b, the BMU 22b, and the battery controller 13b by the communication bus 20b through the I / O 33e. Since the control of the 1st system and the 2nd system is exchanged every day, the program storage units 32a and 33a of the SPMs 21a and 21b of FIGS. 8 and 9 store both programs (programs of FIGS. 15 and 16). There is.

The BMU22b is a device capable of detecting the remaining amount of the storage battery 14b. In the case of a secondary battery such as the lead storage battery, the remaining amount of the storage battery 14b is detected by the same configuration as the BMU22a, and the battery is concerned. The remaining amount data is constantly wirelessly transmitted to the EMS19. The SMC 23 (see FIG. 2) is provided in common to the 1 system and 2 systems, and receives a wireless control command from the EMS 19 and receives 1 system or 2 systems of smart meters 18a for each command. It is distributed to 18b.

The EMS19 can wirelessly communicate with the smart meters 18a and 18b, the SMC23, the SPM21a, 21b, and the BMU22a, 22b, and can use, for example, a radio wave of the WiFi standard, for example, 2.4 GHz band. can. Of course, a repeater may be provided between the EMS 19 and the electric power facility so that transmission and reception can be performed via the repeater. This EMS19 has various data (for example, at least the power generation data of the power generation equipment of one system and two systems) and the balance of the power storage devices of one system and two systems sent from the SPM21a of one system and the SPM21b of two systems. Receives quantity data, data related to the output power of the 1-system, 2-system interconnection converter, etc.), and the output power of the 1-system interconnection inverter 15a (power after division in charge of 1 system) and 2 systems. The total output power (power after division in charge of the two systems) of the grid interconnection inverter 15b of the above system constantly outputs the required constant power supply to the output AC wiring 5 from 3:00 to 15:00. It controls so that it can be done.

Specifically, the EMS 19 has the configuration shown in FIG. This EMS 19 is a program storage unit 19b that stores the program of the operation procedure shown in FIGS. 3 and 11 to 13 described later, a CPU 19a that performs various controls according to the control program, and various data temporarily in the operation process of the control program. A data storage unit 19d (see FIG. 14) to be stored in the program, a communication unit 19c for communicating with the wireless transmitter / receiver 31 via the hub 30, an input means 19e such as a keyboard, and a display unit 19f such as a monitor for displaying various information. These devices are connected via the communication bus 19'.

Next, the overall configuration of the control system of the present invention will be described with reference to FIG. It is the above-mentioned EMS 19 that constitutes the center of control of the present invention. A plurality of smart meters 18a, 18b are installed in various places of each system, and the various measurement data (including data from BMU22a, 22b) from these smart meters 18a, 18b are transmitted via SPM21a, 21b. , Is transmitted to the EMS 19 at all times or at regular intervals. Therefore, the EMS 19 grasps various data of each system. This EMS 19 also receives meteorological data from the meteorological observation device 39 and uses it for power consumption prediction and the like. The EMS 19 is configured to transmit a control command to the SPM 21a, 21b or the SMC 23 based on various transmitted data to control the output power of the power equipment of the 1st system and the 2nd system. Further, FAN control means Field Area Network control. In the figure, the power failure activation device 44 transmits an activation command for restoring power to the SPMs 21a and 21b in the event of a power failure.

Hereinafter, the operation of the power supply facility using the renewable energy according to the present invention will be outlined with reference to FIGS. 3 and 4.

The EMS19 controls the power equipment using the renewable energy with respect to the power required by the customer (required power supply) as follows. Here, in the power request, for example, it is assumed that the required power supply (power request) is 200 [kW] from 9:00 to 15:00 of the power supply time. Therefore, from 9:00 to 15:00, it is assumed that the changeover switches 9a to 9d are switched from the existing equipment side to the new additional equipment side (new DC wiring 10a to 10d side).

In FIG. 3, first, the customer request is input to EMS19. In this case, the required supply power of 200 [kW] and the supply time of 9:00 to 15:00 are input to EMS 19 (see FIG. 3P1).

The EMS19 divides the 200 [kW] into one system and two systems (see FIG. 3P2). Here, the power of 150 [kW] in one system (maximum output of the grid interconnection inverter 15a), the power of 50 [kW] in the two systems (the maximum output or less, that is, the grid interconnection inverter). It is distributed to 1/3 of the maximum output of 15b (power after division of 2 systems), and this distribution is set to be replaced every day (see 1 system and 2 systems in FIGS. 3P23 and 4). Therefore, on the first day, a constant power of 150 [kW] is output from the power equipment of one system (see FIG. 4 supply power amount K1), and a constant power of 50 [kW] is output from the power equipment of the two systems (Fig. 4). 4 Supply power amount K2)) Output the total constant power 200 [kw] of 1 system and 2 systems to the external microgrid 6 (see Fig. 4 supply power amount K3), and replace this on the 2nd day. The grid power equipment outputs a constant power of 50 [kW], the two power equipment outputs a constant power of 150 [kW], and this replacement operation is repeated every day (FIGS. 4, FIG. 3P23, FIG. 13). reference).

Next, the operation of the EMS 19 for one system of electric power equipment will be described.
The EMS 19 wirelessly receives the power generation data of one system (the power generation M1 of one system in FIG. 4) via the smart meter 18a (SPM21a) at regular intervals or at all times (see FIG. 3P3). Since this generated power is generated by the photovoltaic power generation arrays 1a and 1b, it is not stable with time. For example, as shown by M1 in FIG. 4, it constantly changes finely and the daytime is the peak as a whole. It becomes Yamagata.

Upon receiving the generated power data, the EMS 19 sets the power of the target value for each hour so that the generated power becomes 150 [kW] (constant) (this is set as the target value S2) as a whole (Fig.). See 3P4). Specifically, the time t1 to the time t2 is the target value S1 (<S2), the time t2 to the time t3 is the target value S2 (= 150 [kW], maximum output), and the time t3 to the time t4 is the target value S3 (<. S2), time t4 to time t5 are set to the target value S4 (<S2) (see FIG. 4, 1 system). The maximum rating of the target value S2 is 150 [kW]. Therefore, the target value S2 coincides with the power after the division of one system.

After that, the generated power M1 and the target value are compared (see FIG. 3P5). By the comparison operation, when the generated power M1 at that time is larger than the target value S1 between the time t1 and the time t2, the SPM21a is instructed to output the entire target value S1 to the DC380V line ( (See FIGS. 3P6 and P11), the generated power M1 in the portion exceeding the target value S1 (S2-S1 = S1') is instructed to the SPM21a to be replenished by discharging from the storage battery 14a (see FIG. 3P12). Therefore, from time t1 to t2, as shown in FIG. 4, a constant generated power corresponding to the target value S1 is generated via the DC380V line 12a under the control of SPM21a, and the DC / AC inverter (system interconnection inverter) 15a. (See arrows L1 and L2 in FIG. 4), and the generated power corresponding to (S2-S1 = S1') from the storage battery 14a is transferred to the DC / AC inverter (system interconnection inverter) 15a via the DC380V line 12a. It is sent out (see arrow L4 in FIG. 4), converted from DC voltage to alternating current of 3-phase 4-wire 220V by the inverter 15a, and output to the new wiring 17 (see FIG. 3P9 and arrow L5 in FIG. 4). By such an operation, a constant power of 150 [kW] (= S2) is output from the DC / AC inverter (system interconnection inverter) 15a to the new wiring 17 (see arrow L5 in FIG. 4). Such an operation is the same from time t3 to time t4 and from time t4 to time t5, and in these periods, the power generated by the photovoltaic power generation arrays 1a and 1b having the target values S3 and S4 and (S2- The electric power of the parts of S3 = S3') and (S2-S4 = S4') is supplemented by the electric power generated by the discharge from the storage battery 14a, and during the above period, the grid cooperation inverter 15a to 150 [kW] (electric power after division). A constant amount of electric power is supplied to the new wiring 17 (see FIG. 3P9 and FIG. 4 arrow L5).

After that, the EMS 19 detects that the requested time of 15:00 has not yet passed (see FIG. 3P10), returns to step P3 again, and repeats the operations of steps P4 to P10.

If it is determined in step P6 of FIG. 3 (range from time t2 to time t3) that the generated power M1 exceeds the target value S2, the EMS 19 is a constant power of the target value (S2 = 150 [kW]). (See FIG. 3P7), and instructing the SPM21a to charge the storage battery 14a for the power exceeding the target value S2 (see FIG. 3P8).

Therefore, due to this operation, a constant power of 150 [kW] is output from the DC / AC inverter (system interconnection inverter) 15a to the new wiring 17 during the period from time t2 to time t3 (FIG. 4). (See arrows L1 and L2), the storage battery 14a is charged for the generated power exceeding the target value S2 (see arrow L3 in FIG. 4).

When the generated power M1 is smaller than the target value S1, all the generated power M1 is output, and the shortage is discharged from the storage battery 14a to instruct the output power to be 150 [kW] (FIG. 3P11, See P12 ).

Next, the operation of the EMS 19 for the two power systems will be described.
The EMS 19 wirelessly receives the power generation power data of the two systems (the power generation power M2 of the two systems in FIG. 4) via the smart meter 18b (SPM21b) (see FIG. 3P13). Since this generated power is generated by the photovoltaic power generation arrays 1c and 1d, it is not stable with time. Similarly, for example, as shown by M2 in FIG. 4, it constantly changes finely and as a whole during the daytime. It becomes a mountain shape with the top.

Upon receiving the generated power data, the EMS 19 sets a target power for each hour so that the total power becomes 50 [kW] (constant) (see FIG. 3P14). Specifically, a constant output target value S5 is set from time t1 to time t5 (FIG. 3P14). In this case, a constant target value (S5 = 50 [kW], power after division) lower than the generated power M2 is set regardless of the time.

After that, the generated power M2 and the target value S5 are compared (see FIG. 3P15). By the comparison operation, since the generated power M2 at that time is larger than the target value S5 between the time t1 and the time t5, the SPM21b is instructed to output the target value S5 to the DC380V wiring 12b (FIG. 3P16, (See P17), the generated power M2 exceeding the target value S5 instructs the SPM21b to charge the storage battery 14b (FIG. 3P18). Therefore, under the control of the SPM21b, during time t1 to t5, as shown in FIG. 4, a constant power generation power (50 [kW]) corresponding to the target value S5 is DC / AC inverter via the DC380V line 12b. It is sent to (grid interconnection inverter) 15b (see arrows L1'and L2' in FIG. 4), is converted from DC voltage to alternating current of 3-phase 4-wire 220V by the inverter 15b, and is output to the new wiring 17 (FIG. 3P19). , FIG. 4 arrow L5'). By this operation, a constant power of 50 [kW] is output from the DC / AC inverter 15b to the new wiring 17, and under the control of the SPM 21b, the battery controller 13b has a generated power M2 that exceeds the target value S5 to the storage battery 14b. It is charged (see FIG. 3P18, FIG. 4 arrow L3').

By the above control, a constant power of 200 [kW] in total can be supplied to the output AC wiring 5 as the output power of the grid interconnection inverter 15a and the grid interconnection inverter 15b (see FIG. 4 supply power K3).

After that, the EMS 19 detects whether or not the time has reached 15:00 (see FIG. 3P20), returns to step P13 again, and repeats the operations of step P14 to step P20. In this case, since the output power of the two systems is as low as 50 [kW], the ratio of being charged to the storage battery 14b increases, and the storage battery 14b can be in a state close to full charge.

If the generated power is smaller than the target value S5, all the generated power M2 is output, the shortage is discharged from the storage battery 14b, and the output power is instructed to be 50 [kW] (FIGS. 3P21 and P22). reference). However, since the target value S5 of the two systems is set to be considerably lower than the generated power, the storage battery is usually mainly charged by the two systems.

After that, when the time reaches 15:00, the EMS 19 exchanges the operations of the 1st system and the 2nd system, and repeats the operations from step P2 to the subsequent operations from 9 o'clock the next day (see FIG. 3P23). Therefore, from 9 o'clock the next day, in charge of the power generation output of 150 [kW] in the two systems (generated power 50 [kw]) of the previous day, and 50 [in the one system (generated power 150 [kW]) of the previous day. kW] will be in charge of the power generation output. After that, the operation of one system and the operation of two systems are sequentially exchanged every day.

In this way, two systems of power equipment are provided, and the required power is distributed to one system and two systems, for example, 75% of the required power (150 [kW]) is output by one system, and the two systems output power (150 [kW]). Output 25% of the required power (50 [kW]) so that 100% (200 [kW]) of the required power can be supplied in total of the two, and this distribution is changed (replaced) daily. As a result, a large amount of power can be stored in the storage battery of one of the power facilities that was in charge of 25%, and when it was replaced (when in charge of 75%), the generated power did not reach the target value due to the influence of the weather etc. In addition, even in a situation where a large amount of power must be discharged from the storage battery, it can be sufficiently dealt with.

Further, since the storage battery repeats a state close to full charge and a low charge state every day, the life of the storage battery can be extended.

The distribution of 75% and 25% is an example, and the ratio of the distributed power can be arbitrarily set. For example, the power of one system can be any of 85% to 65%, and the power of two systems can be any of 15% to 35%. However, instead of allocating the power in charge of both systems evenly, the power supply of one system is increased (for example, 150 [kW]) and the power supply of the other system is decreased (for example, 50 [kW]). It is important to set the storage battery of the other system so that it can be charged more. As a result, the storage battery of the system in charge of low power supply can always realize a state close to full charge (see Fig. 4 and 2 storage battery 14b), and when it becomes in charge of high power the next day, the weather Even if the generated power is reduced due to a sudden change or the like, the supplied power can be maintained by discharging from the storage battery of the system.

Next, the operation of the power supply equipment according to the present invention will be described in more detail.
The functional blocks of the EMS 19 are shown in FIGS. 19 (1 system) and 20 (2 systems), and the functional blocks of the SPM 21a and 21b are shown in FIGS. 21 (1 system) and 22 (2 systems). These functional blocks will be described together with the operation description.

In FIG. 4, S2 is a power of 150 [kW] of one system, and S5 is a power of 50 [kW] of two systems. Further, as shown in FIGS. 17 (a) and 17 (b), one system of the PV converters 11a and 11b and two systems of the PV converters 11b and 11c generate electricity for the DC / DC converters 11a'and 11b'. The PV converter 36a and the two systems including the power generation amount control unit 35a for controlling the amount (power generation amount of the solar power generation arrays 1a and 1b) generate power generation amount for the DC / DC converters 11c'and 11d' (solar power generation array 1c). , 1d), it is assumed that it is composed of a PV converter 36b including a power generation amount control unit 35b. Further, as shown in FIGS. 18A and 18B, one system of the battery controller 13a uses the charge / discharge control unit 37a for charging / discharging the charging power of the storage battery 14a to the DC380V line 12a and the discharged power. A power control unit 38a for controlling is provided, and the two battery controllers 13b include a charge / discharge control unit 37b for charging / discharging the charging power of the storage battery 14b to the DC380V line 12b, and a power for controlling the discharged power. It is assumed that the control unit 38b is provided.

First, it is assumed that the power request is 200 [kW] from 9:00 to 15:00 (6 hours) of the power supply time (see FIG. 4 power supply amount K3). Further, the electric power of 200 [kw] is 150 [kW] in one system (FIG. 4 supply electric energy K1, power after division) and 50 [kW] in two systems (FIG. 4 supply electric energy K2, after division). It is assumed that the electric power is distributed to the electric power) and the total electric energy requirement of one system and the two systems is 200 [kW] (FIG. 4, supply electric power K3). Then, this power distribution is switched between one system and two systems every day. That is, on the second day, one system is in charge of 50 [kW] and two systems are in charge of 150 [kW]. These conditions are input in advance from the input unit 19e (see FIG. 10) of the EMS 19 into the EMS 19 and stored in the data storage unit 19d (see FIGS. 11P1, P2, 14A).

As shown in M1 of FIG. 4, the daily power generation of one system of photovoltaic power generation arrays 1a and 1b is a mountain shape having a peak near noon. This generated power is input to the PV converters 11a and 11b (FIG. 17 (a) and PV converter 36a) via the new DC wirings 10a and 10b, converted to DC380V by these PV converters 11a and 11b, and is converted to a DC380V line (DC). It is supplied to the power supply line) 12a.

At this time, the power generated by the new DC wirings 10a and 10b (power generated at point a in FIGS. 1 and 2), the storage capacity of the storage battery 14a (remaining capacity of the storage battery detected by BMU22a, point b in FIG. 2), and The output power of the grid interconnection inverter 15a (power at point c in FIGS. 1 and 2) is detected by the smart meter 18a and transmitted from the smart meter 18a to the SPM21a (see FIG. 8). These data are stored in the storage unit 32c, and are transmitted from the communication unit 32d and the wireless transmitter / receiver 33 to the EMS 19 at regular time intervals. Therefore, the EMS 19 (see FIG. 10) receives these data via the wireless transceiver 31 and stores them in the data storage unit 19d (see FIG. 14 (b) 1 system, FIG. 11P3). The EMS 19 can display the data of one of these systems as a graph on the display unit 19f (see FIG. 10) as needed.

As shown in M2 of FIG. 4, the daily power generation of the two photovoltaic power generation arrays 1c and 1d is similarly a mountain shape with the peak near noon. This generated power is input to the PV converters 11c and 11d (FIG. 17B, PV converter 36b) via the new DC wirings 10c and 10d, converted to DC380V by these PV converters 11c and 11d, and is converted to a DC380V line (DC). It is supplied to the power supply line) 12b.

At this time, the generated power in the new DC wirings 10c and 10d (power generated at points a'in FIGS. 1 and 2) and the storage capacity of the storage battery 14b (remaining capacity of the storage battery detected by BMU22b, point b'in FIG. 2). The output power of the grid interconnection inverter 15b (power at point c'in FIGS. 1 and 2) is detected by the smart meter 18b, transmitted to the SPM 21b (see FIG. 9) through the smart meter 18b, and described above. The SPM 21b stores these data in the data storage unit 33c, and also transmits the data to the EMS 19 by the wireless transmitter / receiver 34 via the communication unit 33d at regular time intervals. The EMS 19 (FIG. 10) receives these data via the wireless transceiver 31 and stores them in the data storage unit 19d (see FIG. 14 (b) 2 systems, FIG. 11P3). The EMS 19 can display the data of these two systems as a graph on the display unit 19f (see FIG. 10) as needed.

As described above, the EMS 19 is the power generated by the 1 and 2 photovoltaic power generation arrays 1a to 1d and the balance of the storage batteries 14a and 14b by various transmission data from the SPM 21a and 21b at regular time intervals or at all times. The amount and the output power of the grid-linked inverters 15a and 15b are always grasped (see FIG. 11P3).

(See time t1 to time t2, FIGS. 11 and 15 of one system)
The EMS19 (FIG. 10, CPU19a) grasps the remaining amount data of the storage battery 14a from one system of SPM21a (see FIG. 11P4, FIG. 19 data receiving means 39a, battery remaining amount detecting means 39g), and is used for the transmission data. Based on this, the comparison means 39b (see FIG. 19) detects that the generated power at point a (time t1 to time t2) does not reach the maximum output of 150 [kw] = S2 in one system (FIG. 19). 11P5NO), the power level setting means 39f (see FIG. 19) is one system, and the power generation amount commanding means 39c (see FIG. 19) is S1 (target value Sn, n = 1) (<150) for time t1 to time t2. [Kw]) is set and stored (see FIGS. 11P6 and 14 (c) S1), and the S1 [kw] is output from the DC380V line 12a to the grid interconnection inverter (DC / AC inverter) 15a. (See FIG. 11P7), and the insufficient power of the part of the charge / discharge command means 39d (see FIG. 19) (150 [kW] (= S2) -S1 = S1') is linked from the storage battery 14a to the grid. Instruct the SPM21a to output (discharge) to the inverter 15a (see FIG. 11P8, data transmission means 39e, FIG. 19, FIG. 14 (c) S1'). The EMS19 (power level setting means 39f, see FIG. 19) sets the target value of the generated power (<150 [kW]) at time t1 as S1, and the power generation amount commanding means 39c has the generated power S2 (= 150 [= 150 [kW]). kw]) is exceeded, the SPM21a is instructed to output the constant power S1 from the DC380V line 12a to the grid interconnection inverter 15a (see FIG. 11P7).

The EMS19 (battery remaining amount detecting means 39 g, FIG. 19) recognizes the battery remaining amount of the storage battery 14a from the BMU22a via the SPM21a, and the output power S1 is (1) based on the battery remaining amount. By compensating for the insufficient power of S2-S1 = S1') by discharging from the storage battery 14a, the power level is set so that the power of 150 [kW] can be output (FIG. 11P6, FIG. 14C) S1 + S1'= 150 [kW]. reference).

The SPM 21a (FIG. 8, CPU 32b) receives a control command (command data) from the EMS 19 by a wireless transmitter / receiver 33 (data receiving means 40a, see FIG. 21) (see FIG. 15P1), and determines means 40d (see FIG. 15P1). Since 21) is determined whether it is a charge command or a discharge command (see FIG. 15P2), since it is a discharge command here (FIG. 15P2, YES), the process proceeds to steps P3 and P4, and the charge / discharge control means 40c (see FIG. 21). Instructs the power control unit 38a of the battery controller 13a (see FIG. 18A) to generate insufficient power corresponding to (S2-S1 = S1'), and also instructs the charge / discharge control unit 37a to the DC380V line 12a. (See time t1 to t2) (see FIG. 15P4 and FIG. 4 arrow L4) to instruct the discharge of the constant power (S2-S1 = S1'). Further, the SPM21a (power generation amount control means 40b, see FIG. 21) is the power generated by the photovoltaic power generation arrays 1a and 1b with respect to the power generation amount control unit 35a of the PV converter 36a (see FIG. 17A). Among them, the constant value S1 is instructed to be output to the DC380V line 12a via the DC / DC converters 11a'and 11b' (see FIG. 15P3 and FIG. 4 arrow L1), and as a result, with respect to the grid interconnection inverter 15a. Of the electric power generated by the photovoltaic power generation arrays 1a and 1b, a constant value S1 is output (see FIG. 15P3 and FIG. 4 arrow L2), and the total of the discharge power and the generated power from the storage battery 14a is 150 [ One system is controlled so as to have a constant value (S2) (power after division) of [kW] (see FIG. 15P5 and FIG. 4 arrow L5).

This situation continues until the power generated by the photovoltaic arrays 1a and 1b exceeds S2, which is 150 [kW], and thus the time t1 to time t2 consist of the power generated from the photovoltaic arrays 1a and 1b. The constant power of S1 is supplied from the DC380V line 12a to the grid interconnection inverter 15a (see arrow L2 in FIG. 4), and the constant power due to the discharge of the storage battery 14a (S2-S1 = S1') is supplied from the DC380V line 12a. It is supplied to the interconnection inverter 15a (see arrow L4 in FIG. 4), and as a result, a constant power of 150 kW (S2), which is the total power, is converted into AC power by the grid interconnection inverter 15a, and is converted into AC power, 3-phase 4-wire 220V. It is output to the AC wiring 3 via the new wiring 17 through the line of. Therefore, from time t1 to t2, a constant power (target value S2) of 150 [kW] (power after division) is supplied to the output AC wiring 5.

(See time t1 to time t2, FIGS. 12 and 16 in the two systems)
Even in the two systems, the EMS19 (CPU19a, battery remaining amount detecting means 42g, see FIG. 20) recognizes the storage battery remaining amount of the two systems BMU22b (see FIG. 12P15), and then the comparison means 42b described above. Based on the transmission data, the generated power at point a'in the two systems exceeds (time t1 to time t2), which is the power in charge of the two systems, 50 [kw] = S5 (target values Sm, m = 5). It is detected (see FIG. 12P16).

Therefore, in the two systems, the EMS 19 (power level setting means 42f, see FIG. 20) sets the output power S5 to 50 [kW] (target value) (see FIGS. 12P17 and 14 (c) S5), and generates power. The quantity command means 42c outputs a constant power (power after division) of 50 [kw] (S5) from the DC380V line 12b to the grid interconnection inverter (DC / AC inverter) 15b at these times t1 to t2. Instructs the SPM21b (see FIG. 12P18), and the charge / discharge command means 42d (see FIG. 20) instructs the SPM21b to charge the storage battery 14b for the generated power exceeding S5 (50 [kW]) (see FIG. 12P18). See FIG. 12P19).

Therefore, the SPM 21b (FIG. 9, CPU 33b) determines that the determination means 43d (see FIG. 22) is a charging command, and issues a control command (command data) from the EMS 19 to the wireless transmitter / receiver 34 (data receiving means 43a). (See FIG. 22), and the power generation control means 43b (see FIG. 22) receives sunlight with respect to the power generation control unit 35b of the PV converter 36b (see FIG. 17 (b)). Of the power generated by the power generation arrays 1c and 1d, a constant value S5 (50 [kW]) is instructed to be output to the DC380V line 12b via the DC / DC converters 11c'and 11d'(FIG. 16P2, FIG. 4 As a result, a constant value S5 (power after division) among the power generated by the photovoltaic power generation arrays 1c and 1d is output to the grid interconnection inverter 15b (see FIG. 16P2). , FIG. 4 arrow L2'), and for the generated power exceeding S5 (50 [kW]), the charge / discharge control means 43c (see FIG. 22) is the battery controller 13b (see FIG. 18 (b)). The charge / discharge control unit 37b is instructed to charge (see FIG. 16P3 and FIG. 4 arrow L3').

As a result, the constant power (S5) of 50 [kW] is converted into AC power by the grid interconnection inverter 15b (3-phase 4-wire 220V), and is output to the output AC wiring 5 via the new wiring 17 (FIG. 16P4). , See arrow L5' in FIG. 4). Therefore, from time t1 to t2, a constant power of 50 [kW] is supplied to the output AC wiring 5, and the capacitor 14b is charged for the generated power exceeding S2 (50 [kW]). (See FIG. 4 arrow L3').

As described above, at times t1 to t2, 50 [kW] of electric power is output to the new wiring 17 through the grid interconnection inverter 15b in the two systems. Further, the EMS 19 instructs the battery controller 13b to charge the generated power exceeding 50 [kW] in the above two systems through the SPM 21b. Therefore, the battery (storage battery) 14b is charged for the electric power exceeding 50 [kW] at the times t1 to t2 of the two systems (see arrow L3'in FIG. 4).

Therefore, at the above times t1 to t2, the new wiring 17 has a total of 200 [kw], that is, 150 [kW] which is the output power of the grid interconnection inverter 15a of one system and the grid interconnection inverter 15b of two systems . A constant power of 200 [kW], which is a total of 50 [kW], which is the output power of the inverter (FIG. 4, supply power amount K3), is stably supplied to the external microgrid power supply 6 via the output AC wiring 5. Become.

(See time t2 to time t3, FIGS. 11 and 15 of one system)
EMS19 (FIG. 10, CPU19a, battery remaining amount detecting means 39g, see FIG. 19) returns to step P4 through step P10 of FIG. 11 and confirms the current remaining battery level with BMU22a (see FIG. 11P4). .. The above EMS19 (comparative means 39b, see FIG. 19) targets when the generated power (power at point a) of the photovoltaic power generation arrays 1a and 1b in one system exceeds the time t2, based on the transmission data from the SPM21a. Since it is detected that the value S2 (= 150 [kW]) has been exceeded (see FIG. 11P5YES), the generated power exceeds 150 [kW] from time t2 to t3 in one system (see FIG. 11P5). The EMS19 (power level setting means 39f, see FIG. 19) has a constant power S2 (target value Sp, p = 2) of 150 [kW] until the generated power becomes 150 [kW] or less (until time t3). ) Is set and stored (see FIGS. 11P11 and 14C), and the power generation amount commanding means 39c transfers the constant power S2 (= 150 [kW]) from the DC380V line 12a to the grid linkage inverter (DC / AC inverter). Instruct SPM21a to output to 15a (see FIG. 11P12). At the same time, the EMS19 (charge / discharge command means 39d) generates power exceeding S2 (150 [kW]) after time t2 until the generated power of the photovoltaic power generation arrays 1a and 1b becomes S2 or less (until time t3). Regarding the electric power, the SPM21a is instructed to charge the storage battery 14a (see FIG. 11P13), and a total electric power output command of 150 [kW] is transmitted to the SPM21a (see FIG. 11P14).

After the time t2, the SPM 21a (FIG. 8, CPU 32b, data receiving means 40a, see FIG. 21) receives a control command from the EMS 19 by the wireless transmitter / receiver 33 (see FIG. 15P1), and the determination means 40d (see FIG. 15P1). (See FIG. 21) determines whether it is a charge command or a discharge command (see FIG. 15P2), and since it is a charge command here, the process proceeds to step P7. That is, the SPM21a (power generation amount control means 40b, see FIG. 21) is the power generated by the photovoltaic power generation arrays 1a and 1b with respect to the power generation amount control unit 35a of the PV converter 36a (see FIG. 17A). Among them, the constant value S2 (150 [kW]) is instructed to be output to the DC380V line 12a via the DC / DC converters 11a'and 11b' (see FIG. 15P7 and FIG. 4 arrow L1), and as a result, grid interconnection. A constant value S2 (150 [kW]) of the electric power generated by the photovoltaic power generation arrays 1a and 1b is output to the inverter 15a (see FIG. 15P5 and FIG. 4 arrow L2). Therefore, the constant power (S2 = 150 [kW]) in the generated power is output from the grid interconnection inverter 15a to the new wiring 17 (see FIGS. 15P5 and 4 arrow L5). Further, the SPM 21a (charge / discharge control means 40c, see FIG. 21) controls the charge / discharge control unit 37a of the battery controller 13a (see FIG. 18 (a)) for the generated power exceeding S2 (150 [kW]). Then, the storage battery 14a is charged (see FIG. 15P8 and FIG. 4 arrow L3).

Therefore, in one system, a constant power of 150 [kW] (power after division) is output to the new wiring 17 through the grid interconnection inverter 15a from time t2 to t3 (see FIGS. 15P5 and 4 arrow L5). .. Further, the EMS 19 instructs the battery controller 13a to charge the generated power exceeding 150 [kW] at times t2 to t3 via the SPM 21a (see arrow L3 in FIG. 4). Therefore, the storage battery 14a is charged with the electric power exceeding 150 [kW] at the times t2 to t3.

(See time t2 to time t3, FIGS. 12 and 16 in the two systems)
On the other hand, in the two systems, the EMS 19 (battery remaining amount detecting means 42 g, FIG. 20) subsequently confirms the storage battery remaining amount from the BMU 22b (see FIG. 12P15), and the comparison means 42b still checks at this time t2 to t3. Recognizing that the generated power of the two photovoltaic power generation arrays 1c and 1d exceeds 50 [kw] (= S5) (see FIGS. 12P16 and 4S5), the power generation amount commanding means 42c is 50 [kw]. ] Is instructed to SPM21b to output the constant power from the DC380V line 12b to the grid interconnection inverter (DC / AC inverter) 15b (see FIG. 12P18). Therefore, at times t2 to t3, a constant power of 50 [kW] is connected to the two systems by controlling the PV converter 36b (see FIG. 17 (b)) of the SPM 21b (power generation amount control means 43b, see FIG. 22). It is output to the new wiring 17 through the system inverter 15b (see FIGS. 16P2 and P4, FIGS. 4 arrows L1', L2', L5'). Further, the EMS 19 (charge / discharge command means 42d, see FIG. 20) commands the battery controller 13b to charge the battery controller 13b through the SPM 21b with the generated power exceeding 50 [kW] in the above two systems (see FIG. 12P19). .. Therefore, the SPM21b (charge / discharge control means 43c, see FIG. 22) tells the charge / discharge control unit 37b of the battery controller 13b (see FIG. 18B) about the generated power exceeding S5 (= 50 [kW]). Command to charge (see FIG. 16P3). Therefore, the storage battery 14b is charged for a large amount of electric power exceeding 50 [kW] at times t2 to t3 of the two systems (see arrow L3'in FIG. 4). As described above, the charge amount of the storage battery 14b becomes very large in the two systems (see the storage battery 14b in FIG. 4).

Therefore, at the above times t2 to t3, following the new wiring 17, the output power of one system linked inverter 15a is 150 [kW] (see FIG. 4 supply power amount K1) and the two grid linked inverters 15b. A constant power of 200 [kW] in total of the output power of 50 [kw] (see FIG. 4 supply power amount K2) is stably supplied (see FIG. 4 supply power amount K3).

(See time t3 to time t4, FIGS. 11 and 15 of one system)
Hereinafter, the same applies, but the EMS 19 (FIG. 10, CPU 19a, battery remaining amount detecting means 39 g, FIG. 19) recognizes the remaining amount of the storage battery 14a based on the transmission data from the BMU 21a in step P4 of FIG. At the same time, the comparison means 39b detects that the generated power of the photovoltaic power generation arrays 1a and 1b is S2 (= 150 [kW]) or less at time t3 based on the transmission data from the SPM21a. (See FIG. 11P5NO), the power level setting means 39f (FIG. 19) sets and stores a constant power S3 (target value Sn, n = 3) lower than 150 [kW] (see FIGS. 11P6 and 14 (c) S3). The power generation amount commanding means 39c instructs the SPM21a to output the power S3 to the grid interconnection inverter 15a (see FIG. 11P7), and the charging / discharging commanding means 39d lacks (S2-S3 = S3'). The SPM21a is instructed to discharge and supplement the power from the storage battery 14a (see FIG. 11P8), and the total of the discharge power from the storage battery 14a and the power generated by the photovoltaic power generation arrays 1a and 1b is constant at 150 [kW] (S2). Instruct SPM21a to use electric power (see FIG. 11P9).

At this time, since the EMS 19 (battery remaining amount detecting means 39 g, see FIG. 19) detects the battery remaining amount of the BMU 22a from the transmission data (see FIG. 11P4), the power level setting means 39f is (S2-S3 =). It is determined whether or not the insufficient power of S3') can be covered by the remaining battery level of the storage battery 14a, and the power of (S2-S3) is within the range covered by the discharge of the remaining battery power, that is, the generated power S3 and the storage battery 14a are discharged. Determine the level of the constant power S3 (target value) so that the total power can be maintained at 150 [kW] (see FIG. 11P6, FIG. 14 (c) S3 + S3'= 150 [kW]), and notify the SPM21a. do.

The SPM 19 (FIG. 8, CPU 32b) receives the control command from the EMS 19 by the wireless transmitter / receiver 33 (see FIG. 15P1), and determines whether the determination means 40d (see FIG. 21) is a charge command or a discharge command. Since it is determined (see FIG. 15P2) and it is a discharge command here (FIG. 15P2YES), the charge / discharge control means 40c shifts to steps P3 and P4 at times t3 to t4, and the battery controller 13a (see FIG. 18A). ) Is instructed to generate insufficient power corresponding to (S2-S3 = S3'), and the charge / discharge control unit 37a is instructed to discharge the above power (S2-S3) to the DC380V line 12a. (See time t3 to t4) (see FIGS. 15P4, 4 arrows L3 and L4). Further, the SPM 21a (power generation amount control means 40b) has a constant value among the power generated by the photovoltaic power generation arrays 1a and 1b with respect to the power generation amount control unit 35a of the PV converter 36a (see FIG. 17A). The S3 is instructed to output to the DC380V line 12a via the DC / DC converters 11a'and 11b' (see FIG. 15P3 and FIG. 4 arrow L1), and as a result, the photovoltaic power generation array is provided to the grid interconnection inverter 15a. Of the power generated in 1a and 1b, a constant value S3 is output (see FIG. 15P3 and FIG. 4 arrow L2), and the discharge power from the storage battery 14a (see FIG. 4 arrow L4) and the generated power (see FIG. 4 arrow L4). 4 One system is controlled so that the total of (see arrow L2) becomes a constant value (S2) of 150 [kW] (see FIG. 15P5 and FIG. 4 arrow L5).

Therefore, the time t3 to the time t4 is 150 [kw] (S2), which is the total power of S3 consisting of the power generated from the photovoltaic power generation arrays 1a and 1b and (S2-S3 = S3') from the storage battery 14a. ) Is output to the new wiring 17 through the grid interconnection inverter 15a (see FIG. 15P5 and FIG. 4 supply electric energy K1).

(See time t3 to time t4, FIGS. 12 and 16 of the two systems)
On the other hand, in the two systems, the EMS 19 (power generation amount commanding means 42c, FIG. 20) similarly passes the programs P15 to P17 of FIG. Instruct the SPM21b to output from the line 12b to the grid interconnection inverter (DC / AC inverter) 15b (see FIG. 12P18). Therefore, at times t3 to t4, S5 = 50 [kw] is newly added through the grid interconnection inverter 15b under the control of the PV converter 36b (see FIG. 17B) of the SPM21b (FIG. 9, CPU33b) in the two systems. It is output to the wiring 17 (see FIGS. 16P2 and P4, FIGS. 4 arrows L2'and L5', and the amount of power supplied K2). Further, the EMS 19 (charge / discharge command means 42d) commands the battery controller 13b to charge the battery controller 13b through the SPM 21b with the generated power exceeding 50 [kW] in the above two systems (see FIG. 12P19). Therefore, under the control of the charge / discharge control unit 37b of the battery controller 13b (see FIG. 18B) of the SPM21b (FIG. 9, CPU33b, charge / discharge control means 43c, see FIG. 22), 50 at time t3 to t4 of the two systems. For the power exceeding [kW], the battery is charged (see FIG. 16P3 and FIG. 4 arrow L3').

Therefore, at the above times t3 to t4, the new wiring 17 has a total of 200 [kw], that is, 150 [kW] which is the output power of the grid interconnection inverter 15a of one system (see FIG. 4 supply electric energy K1). A constant power of 200 [kw], which is the total of 50 [kw] (see FIG. 4 supplied power amount K2), which is the output power of the two grid interconnection inverters 15b, is stably external via the output AC wiring 5. It will be supplied to the microgrid 6 (see FIG. 4 supply power K3).

(See time t4 to time t5, FIGS. 11 and 15 of one system)
Further, the operations of the times t4 to t5 are the same as those of the times t3 to t4. That is, the EMS19 (FIG. 10, CPU19a, battery remaining amount detecting means 39g, FIG. 19) confirms the remaining amount of the storage battery 14a based on the data from the SPM21a (see FIG. 11P4), and the EMS19 (comparison means 39b) is used. Based on the transmission data from the SPM21a, it is detected that the generated power of the photovoltaic power generation arrays 1a and 1b is equal to or less than the target value S2 (= 150 [kW]) at time t4, and the constant power is reduced to S3 or less. It is also detected (see FIG. 11P5NO, FIG. 14 (c) S4), and the power level setting means 39f has a constant power S4 (target values Sn, n =) lower than 150 [kw] and even lower than the above S3. 4) is determined (see FIG. 11P6), the power generation amount commanding means 39c instructs the SPM21a to output the power S4 to the grid interconnection inverter 15a (see FIG. 11P7), and the charging / discharging commanding means 39d determines. The power of (S2-S4) is instructed to SPM21a to be supplemented by discharging from the storage battery 14a (see FIG. 11P8), and the total of the discharging power from the storage battery 14a and the generated power of the photovoltaic power generation arrays 1a and 1b is 150 [kW]. (S2) is instructed to SPM21a (see FIG. 11P9).

At this time, the EMS19 (battery remaining amount detecting means 39 g, FIG. 19) detects the battery remaining amount of the BMU22a from the transmission data, and the electric power of (S2-S4 = S4') can be covered by the battery remaining amount of the storage battery 14a. It is determined whether or not the constant power S4 (<S3) is determined within the range where the power of (S2-S4 = S4') can be covered by the discharge of the remaining battery power, and the SPM21a is notified (FIG. 11P6, FIG. 14 (c) See S4 + S4'= 150 [kw]).

The SPM 21a (data receiving means 40a, see FIG. 21) receives a control command from the EMS 19 on the wireless transmitter / receiver 33 (see FIG. 15P1), and determines whether the determining means 40d is a charging command or a discharging command. Since it is a discharge command here (see FIG. 15P2YES), the charge / discharge control means 40c shifts to steps P3 and P4 at times t4 to t5, and the battery controller 13a (see FIG. 18A). ) Is instructed to generate insufficient power corresponding to (S2-S4 = S4'), and the charge / discharge control unit 37a is instructed to discharge the above power (S2-S4) to the DC380V line 12a. (At times t4 to t5) (see FIG. 15P4, FIG. 4 arrow L4). Further, the SPM 21a (power generation amount control means 40b) is constant among the power generated by the photovoltaic power generation arrays 1a and 1b with respect to the power generation amount control unit 35a of the PV converter 36a (see FIG. 17A). The value S4 is instructed to be output to the DC380V line 12a via the DC / DC converters 11a'and 11b' (see FIG. 15P3 and FIG. 4 arrow L1), and as a result, photovoltaic power generation is performed for the grid interconnection inverter 15a. Of the power generated by the arrays 1a and 1b, a constant value S4 is output (see FIG. 15P3 and FIG. 4 arrow L2), and the discharge power from the storage battery 14a (see FIG. 4 arrow L4) and the generated power (see FIG. 4 arrow L4). One system is controlled so that the total of (see arrow L2 in FIG. 4) becomes a constant value (S2) of 150 [kW] (see FIG. 15P5 and arrow L5 in FIG. 4).

Therefore, time t4 to time t5 is 150 [kw] (S2), which is the total power of S4 consisting of the power generated from the photovoltaic power generation arrays 1a and 1b and (S2-S4 = S4') from the storage battery 14a. ) Is output to the new wiring 17 through the grid linkage inverter 15a (see FIG. 15P5, FIG. 4 arrow L5, supply electric energy K1).

(See time t4 to time t5, FIGS. 12 and 16 of the two systems)
On the other hand, in the two systems, the EMS 19 (power generation amount command means 42c, FIG. 20) similarly reaches step P17 from step P15 (see FIG. 12), and the generated power is S5 (= 50 [= 50] even at this time t4 to t5. Since it exceeds kW]) (see FIG. 12P16), the SPM21b is subsequently instructed to output 50 [kW] of power from the DC380V line 12b to the grid linkage inverter (DC / AC inverter) 15b (FIG. 12P16). See 12P18). Therefore, at times t4 to t5, 50 [kW] of electric power is output to the new wiring 17 through the grid interconnection inverter 15b in the two systems (see arrows L2'and L5' in FIG. 4). Further, the EMS 19 (charge / discharge control means 42d) instructs the battery controller 13b to charge the battery controller 13b through the SPM 21b with the generated power exceeding 50 [kW] in the above two systems (see FIG. 12P19). Therefore, the battery is charged for the electric power exceeding 50 [kW] at the times t4 to t5 of the two systems (see arrow L3'in FIG. 4).

Therefore, at times t4 to t5, in the two systems, the PV converter 36b (see FIG. 17B) of the SPM21b (FIG. 9, CPU 33b, power generation amount control means 43b, see FIG. 22) controls 50 [kW]. Electric power is output to the new wiring 17 through the grid linkage inverter 15b (see FIGS. 16P2 and P4, FIG. 4 arrow L5'). Further, by controlling the battery controller 13b (see FIG. 18B) of the SPM 21b (FIG. 9, CPU 33b, charge / discharge control means 43c, see FIG. 22) in the two systems, 50 [kW] at times t4 to t5 of the two systems. For the electric power exceeding the above, the storage battery 14b is charged (see FIG. 16P3 and FIG. 4 arrow L3'). As a result, 50 [kW] of electric power is output from the grid interconnection inverter 15b (see FIG. 16P4 and FIG. 4 arrow L5').

Therefore, at the above times t4 to t5, the new wiring 17 has a total of 200 [kW], that is, 150 [kW] which is the output power of the grid interconnection inverter 15a of one system (FIG. 4, supply power amount K1). A constant power of 200 [kw], which is the total of 50 [kw] (the amount of power supplied in FIG. 4 K2), which is the output power of the two grid interconnection inverters 15b, is stably stable and is connected to the external microgrid via the output AC wiring 5. It will be supplied to the power supply 6 (see FIG. 4 power supply amount K3).

By the above operation, the period from time t1 to time t5 (the period from 9:00 to 15:00, which is the requested supply time) is 150 [kW] for one system (power supply amount K1 in FIG. 4) and 50 for two systems. A constant and stable power of 200 [kw] (FIG. 4 supply electric energy K3) in total of [kw] (FIG. 4 supply electric energy K2) is supplied to the new wiring 7. The electric power supplied to the new wiring 7 is boosted by the existing AC wiring 3 and the distribution transformer 4, and is supplied to the microgrid power supply 6 via the AC wiring 5.

Regarding the power generated before time t1 and the power generated after time t5, the EMS19 switches the changeover switches 9a to 9d to the existing equipment side and uses the existing equipment (PCS2a to 2d side) to install the existing storage battery. 7 is charged. Alternatively, for the power generated before time t1 and the power generated after time t5, the EMS 19 does not switch to the above-mentioned existing equipment, and both one system and two systems are stored in the battery controllers 13a and 13b via the SPM 21a and 21b. 14a and 14b may be instructed to be charged, and as a result, the storage batteries 14a and 14b may be configured to be charged for the generated power before and after the time t1.

Then, in EMS19 (FIG. 10, CPU19a), the 1st system and the 2nd system are exchanged every day (see FIGS. 13P1 to P3). That is, the power equipment in charge of one system was in charge of the algorithm of two systems (see FIGS. 12 and 16) (power after division 50 [kW]) the next day, and the power equipment in charge of two systems was in charge of the two systems. The next day, it is controlled to be in charge of one system of algorithms (see FIGS. 11 and 15) (power after division 150 [kW]) (see FIG. 13P2).

In this way, by setting, for example, the maximum output (150 [kW]) in the power equipment of one system and outputting the remaining power (50 [kW] in this case) in the power equipment of two systems. Since the power equipment in charge of the two systems will be charged a large amount of the storage battery, the next time, the power equipment in charge of this large amount of power will be in charge of the one system with a large amount of power, so tentatively on that day. Even when the weather is bad and the amount of power generated does not reach the required amount of power supply, the power supply can be supplemented by discharging one storage battery, and stable power can be supplied extremely efficiently. be able to.

In addition, since the two storage batteries are mainly charged and the one storage battery is mainly discharged, the storage battery of a single system is charged one day and charged like a discharge the next day. Since the discharge cycle occurs every other day, the life of the storage battery can be kept very long.

In addition, since the grid interconnection inverters 15a and 15b use three inverters with a capacity (rated output) of 50 [kW] (total 150 [kW]) for both one system and two systems, in the case of one system, It will be operated at the maximum output (150 [kW]), and even in the case of two systems, it will be operated at the maximum output (50 [kW]) of a single grid interconnection inverter, and conversion will be performed in any system. It has the advantage of high efficiency.

(Second embodiment)
Next, a second embodiment of the power supply equipment according to the present invention will be described with reference to FIGS. 6 and 7.
As shown in FIG. 6, a plurality of charging devices 24 for electric vehicles are connected to the AC wiring 5 of the external microgrid to which the power supply equipment according to the present invention is connected. Further, each charging device 24 is connected to each of the charging devices 24 via a smart meter 25 switch 25a.

The EMS19 (two battery remaining amount detecting means 42 g, see FIG. 20) monitors the BMU22b of the two systems (the one that is not the maximum output, the system that was in charge of 50 [kW] in the first embodiment), and constantly monitors the BMU22b. Checking the battery capacity of two systems. Normally, since the two systems have a margin in the remaining amount of the storage battery, the EMS 19 sends a chargeable signal to the smart meter 25 via the SMC 23.

In this state, when the electric vehicle 26 is connected to the charging device 24, the connection of the electric vehicle 26 is wirelessly transmitted from the smart meter 25 to the EMS 19 via the SMC 23, and a power transmission command is issued from the EMS 19 to the SMC 23. A charge start command is sent from the SMC 23 to the smart meter 25. The smart meter 25 turns on the switch 25a to supply electric power from the AC wiring 5 to the electric vehicle 26 to charge the electric vehicle 26.

At this time, the EMS 19 issues a power increase command to the SPM 21b, and based on this, the power supply of the two systems is increased only during the charging period of the electric vehicle as shown by the increased powers C1 and C2 (see FIG. 7). To. Specifically, the SPM 21b transmits a discharge command to the charge / discharge control unit 37b of the battery controller 13b (see FIG. 18B), whereby the storage battery 14b is discharged to the grid interconnection inverter 15b (FIG. 7). (See arrow L4'), AC power is supplied to the AC wiring 5 via the grid interconnection inverter 15b (see FIG. 7, arrow L5', power supply amounts C1 and C2). Since C1 is equivalent to one electric vehicle 26 in FIG. 6 and there are two electric vehicles in FIG. 6, the increased power in FIG. 7 is C1 and C2.

When the charging is completed, the smart meter 25 notifies the EMS 19 via the SMC 23 that the charging is completed, so that the EMS 19 commands the SPM 21b to stop the increase in the output. As a result, the increased power C1 and C2 are deenergized.

In this way, when the electric vehicle charging equipment is provided in the wiring of the external microgrid, the power supply is increased during the charging period of the electric vehicle in the two systems, that is, the system in which the storage battery is close to full charge. This has the effect of reliably supplying power to the EV charging system. Of course, the systems in charge of the increased power C1 and C2 will be replaced every day. For example, a changeover switch is provided between the EV charging AC wiring to which the charging device 24 is connected and the grid interconnection inverters 15a and 15b, and the EV charging AC wiring has a lower power charge (the first embodiment described above). Then, it can be configured to connect to two systems) and switch the changeover switch every day.

As described above, in the present invention, the required power supply can be distributed to the power equipment of one system and two systems, and the other system can set the target value of the power supply to be high and the storage amount to be small. For one system, the target value of the power supply is low and the amount of electricity stored is set to a large amount, and by exchanging such distribution every day, the power supply equipment side of the system with a large amount of electricity is always on Since it can be set to the higher target value of the power supply, it is necessary to discharge a lot from the power storage device in the power supply equipment with the higher target value of the power supply due to bad weather, sudden changes in the weather, etc. Even in some cases, it is possible to respond without any problems.

In addition, by performing the replacement operation, the power supply equipment side of the system with a large amount of electricity can be set to the one with the higher target value of the supply power the next day. Even if a large amount of discharge from the power storage device is required in the power supply equipment with a high target value, it is possible to handle it without any problem.

Further, in a system in charge of high power, the power after division can be used as the maximum output of the grid interconnection inverter of the system, so that the power can be efficiently converted.

Further, by wirelessly connecting the power supply equipment and the monitoring / control device, the monitoring / control device can be installed at a place away from the power supply equipment according to the present invention, and the operation of the power supply equipment from a remote location can be performed. Control and monitoring control can be performed. Therefore, for example, the power supply equipment of the present invention can be relatively easily installed in a distributed power source using a microgrid already provided on a remote island or the like.

Further, since the storage batteries 14a and 14b of one system having a large amount of discharge and two systems having a large amount of storage are used alternately, the life of the storage battery can be maintained for a long time.

In addition, since the power supply equipment of the system with the lower target value is used for charging the electric vehicle, the capacity of the storage battery is abundant, and the power stored in the storage battery should be effectively used for charging the electric vehicle. Can be done.

According to the power supply facility using renewable energy according to the present invention, it can be relatively easily installed in an existing distributed power source, so that it can contribute to the stabilization of power of a microgrid such as a remote island. Become.

1a to 1d Photovoltaic power generation array 5 Existing AC wiring 11a to 11d PV converter 13a, 13b Battery controller 14a, 14b Storage battery 15a, 15b System interconnection Inverter 19 EMS (monitoring control device)
18a, 18b Smart Meter 21a, 21b SPM (Smart Power Manager)
24 Charging device 25 Smart meter 26 Electric vehicle 36a, 36b PV converter 39a, 42a Data receiving means 39b, 42b Comparison means 39c, 42c Power generation amount commanding means 39d, 42d Charging / discharging commanding means 39e, 42e Data transmitting means 39f, 42f Power level Setting means 40b, 43b Power generation amount control means 40c, 43c Charge / discharge control means 40d, 43d Judgment means 40e, 43e Data transmission means S1 to S4 Multiple target values for one system S2 Maximum target value for one system S5 Target for two systems value

Claims (7)

A conversion device that converts the power generated from a power generation device using renewable energy into a constant power every hour, a power storage device that charges and discharges the generated power, and an output from the conversion device and / or the power storage device. A power supply facility consisting of a grid interconnection conversion device that converts power into AC and outputs it to the existing AC wiring is provided separately for one system and two systems, and the total power of the above one system and the above two systems is calculated as described above. Configured to supply to existing AC wiring,
A monitoring control device capable of receiving data on generated power from each of the above 1 system and the above 2 systems of power supply equipment and transmitting a control command to each of the above power supply equipment, and
The data regarding the generated power of the one system is transmitted to the monitoring control device, the control command for the one system is received from the monitoring control device, and the output power of the one system is output based on the control command . One system of control device to control is provided,
Data related to the generated power of the two systems is transmitted to the monitoring control device, and the control command for the two systems is received from the monitoring control device to control the output power of the two systems based on the control command. Two control devices are provided,
The monitoring control device divides the required power supply into two, and the divided power in charge of the two systems is lower than the divided power in charge of the one system and the divided power in charge of the one system. Is set, the power after each division is distributed to the above 1 system and the above 2 systems, and the power after division is assigned to the above power supply equipment of each system, and the above 1 system of the above 1 system power supply equipment is assigned. The control command to the control device of each system so that the total power of the power after the division and the power after the division of the two systems of the power supply equipment of the two systems is supplied to the existing AC wiring. Is configured to meet the above required power supply,
Based on the control command for the one system of the monitoring control device, the control device of the one system generates electricity of the one system so that the output of the power supply facility of the one system becomes the power after the division of the one system. While controlling the equipment, if the output power of the power generation equipment of the one system is less than the power after the division of the one system, the power storage device of the one system is discharged to output the power supply equipment of the one system. Is controlled so that it becomes the power after the division of the above one system.
Based on the control command for the two systems of the monitoring and control device, the control devices of the two systems generate electricity from the two systems so that the output of the power supply equipment of the two systems becomes the power after the division of the two systems. In addition to controlling the equipment, if the output power of the two power generation devices exceeds the power after the division of the two systems, the two power storage devices are controlled so as to charge the two power storage devices. And
The monitoring control device is a power supply facility using renewable energy that controls the control command for one system and the control command for two systems to be exchanged every day. The monitoring and control device sets the power after division of the two systems in the power supply equipment of the two systems to be lower than the power of the power supply equipment of the first system after the division of the first system. The power supply facility using renewable energy according to claim 1, which is configured to store more capacity in the two power storage devices than in the power storage amount of the power storage device in the system. .. In the monitoring and control device, in the power supply equipment of the one system, the power after the division of the one system is set within the range of 85% to 65% of the required power supply, and the power supply equipment of the two systems. The power supply equipment using renewable energy according to claim 1 or 2, wherein the power after division of the above two systems is set within the range of 15% to 35% of the required power supply. The monitoring and control device has a data receiving means for wirelessly receiving data related to generated power from the power supply equipment, and a data transmitting means for wirelessly transmitting various control commands to the power supply equipment. ,
The control devices of the first system and the second system are provided in each of the power supply facilities, respectively, and receive data on the generated power from the smart meters provided in each system and transmit the data wirelessly to the monitoring control device. The power supply facility using renewable energy according to any one of claims 1 to 3, further comprising means. The above monitoring and control device
For the above one system,
A plurality of target values of the generated power for each hour of the above-mentioned one system of power generation equipment are set, and the maximum target of the power of the above-mentioned plurality of target values of the above-mentioned one system is the same as the power after the division of the above-mentioned one system. The other target values are the power level setting means that sets the target value lower than the power after the division of the above one system, and the power level setting means.
A comparison means for determining whether or not the power generated by the power generation device of the one system is higher than the maximum target value, which is the power after the division of the one system, and
According to the comparison of the comparison means, when the generated power is higher than the divided power of the one system, the amount of power generated to send a control command to the control device of the one system so as to output the power of the maximum target value. It is provided with a command means and a charge / discharge command means for sending a control command for charging the one system of power storage devices with electric power exceeding the maximum target value.
By comparison of the comparison means, when the generated power is lower than the divided power of the one system, the power generation amount commanding means controls the one system so as to output the target value lower than the divided power. The control command is sent to the device, and the charge / discharge command means is one system by supplementing the shortage of electric power from the low target value to the divided electric power of the one system by discharging from the power storage device. A control command is sent to the above- mentioned one system of control devices so as to satisfy the power after the division.
For the above two systems,
Power level setting means for setting the power after division of the above two systems to the target value of the above two systems, and
A comparison means for determining whether or not the generated power of the above two systems of power generation equipment is higher than the target value of the above two systems, and
When the power generated by the two power generation devices is higher than the target value of the two systems by comparison of the comparison means, a control command is given to the control devices of the two systems to output the power after the division of the two systems. Power generation amount command means to send
When the generated power of the two power generation devices exceeds the target value of the two systems by comparison of the comparison means, a charge / discharge command for sending a control command for charging the excess power to the power storage devices of the two systems is sent. It is equipped with means,
The monitoring control device is a power supply facility using renewable energy according to any one of claims 1 to 4, wherein the control operations of the one system and the two systems are exchanged every day. The one-system control device is a determination means for determining whether the control command from the monitoring control device is a charge command or a discharge command, and
When the judgment of the determination means is a discharge command, the power generation amount control means for controlling the power generation equipment of the one system to output a target value lower than the power after the division, and the power generation amount of the shortage are described above. It is equipped with a charge / discharge control means that controls to be supplemented by discharge from one system of power storage device.
As a result, the power after division of the one system, which is the sum of the power having the low target value and the power shortage due to the discharge, is output from the grid interconnection conversion device of the one system.
When the determination of the determination means is a charge command, the power generation amount control means controls the power generation equipment of the one system to output the divided power of the one system, thereby supplying the power generation device of the one system. The power after division is output from the above-mentioned one system interconnection conversion device.
The charge / discharge control means controls to charge the power storage device of the one system with respect to the power exceeding the power after the division of the one system.
The two-system control device is a determination means for determining whether the control command from the monitoring control device is a charge command or a discharge command, and
When the determination of the determination means is the charge command, the power generation amount control means for controlling the power generation equipment of the two systems to output the power after the division of the two systems and the power generation amount control means after the division of the two systems are performed. It is equipped with a charge / discharge control means for controlling the charging of the above-mentioned two power storage devices for the power exceeding the power.
As a result, the power after the division of the above two systems is output from the system interconnection conversion device of the above two systems.
The renewable energy according to claim 5, wherein the control devices of the above 1 system and the above 2 systems switch the control operations of the above 1 system and the above 2 systems every day by the above control command from the monitoring control device. Power supply equipment using. A charging device for an electric vehicle is connected to the existing AC wiring, and a smart meter capable of communicating with the monitoring and control device is provided.
When the monitoring control device receives information on the start of charging of the charging device of the electric vehicle via the smart meter, the output power of the power supply facility in charge of the lower divided power is increased only during the charging period. The electric power supply facility using the renewable energy according to any one of claims 1 to 6.

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