JP6689124B2 - Power control device - Google Patents

Description

  The present invention relates to a power control device that performs power control for maximally utilizing the generated power of a power generation facility even when it is necessary to control the output of the power generation facility.

  Renewable energy power generation equipment such as solar power generation equipment has a large amount of power generation as a whole due to the rapid spread in recent years, and has become a size that cannot be ignored compared to the power generation power of conventional power generation equipment. In addition, since renewable energy is designed to generate maximum power in response to weather conditions, it does not meet the demand for power consumption, and it has become necessary to control output from outside to adjust the supply and demand of power. . Further, a function of controlling the generated power of the power generation facility is required for each day and each time period based on the output control schedule distributed from the power company. In order to deal with this, even if the power generation equipment can obtain a large amount of generated power, output control may be required, and energy that cannot be effectively used is wasted.

  As a method of effectively utilizing the generated power of a solar power generation system, Patent Document 1 below includes a power generator, a heat pump hot water storage type hot water supply device, an output monitor means for monitoring the output power of the power generator, and a system power monitor means. An energy system is disclosed in which the heat pump hot water storage type hot water supply device is operated with input power substantially corresponding to the difference power when the difference power of the system power monitor value reaches a preset set value.

JP, 2004-194485, A

  However, in the related art represented by the above-mentioned Patent Document 1, output control from the electric power company is not assumed at all, and how to effectively use the generated power after receiving the output control has been examined. There wasn't. Therefore, the conventional technique has a problem that even if the output control information is received from the outside, the generated power that can be originally generated cannot be effectively utilized.

  The present invention has been made in view of the above, and an object thereof is to obtain a power control device that can effectively utilize generated power that can be originally generated when output control information is received from the outside.

  In order to solve the above-mentioned problems and achieve the object, the present invention is a power control device connected to a power generation facility that generates and outputs power and a power storage facility that stores the power output from the power generation facility, An output control information receiving unit that receives output control information that limits the output of the power generation equipment, and a power storage equipment such that when the output control information is received, the amount of power supply output from the power generation equipment to the power system is below a threshold value. And a control unit for increasing the amount of stored electricity.

  According to the present invention, it is possible to effectively use generated electric power by using output control information from the outside.

FIG. 3 is a block diagram showing the configuration of a power control system including the power control device according to the first embodiment. Block diagram showing the configuration of the power control device according to the first embodiment The block diagram which shows an example of the hardware constitutions when implementing the control function in the electric power control apparatus of Embodiment 1. The flowchart which shows the flow of a process in the power control apparatus of Embodiment 1. FIG. 3 is a block diagram showing the configuration of a power control system including a power control device according to a second embodiment. The flowchart which shows the flow of a process in the power control apparatus of Embodiment 2. FIG. 3 is a block diagram showing a configuration of a power control system including a power control device according to a third embodiment. The flowchart which shows the flow of a process in the electric power control apparatus of Embodiment 3. A block diagram showing a configuration of a power control system including a power control device according to a fourth embodiment. FIG. 3 is a block diagram showing an example of an internal configuration for realizing the power control device according to the second embodiment. Block diagram showing an example of an internal configuration for realizing a power control device according to a fourth embodiment A block diagram showing a configuration of a power control system including a power control device according to a fifth embodiment. The block diagram which shows the functional block for implement | achieving the function of the electric power control apparatus which concerns on Embodiment 5, and the flow of a process. The figure which shows the output control schedule which is one of the control tables which the electric power control apparatus which concerns on Embodiment 5 refers. The figure which shows the electric power generation amount actual result table which is one of the control tables which the electric power control apparatus which concerns on Embodiment 5 refers. The figure which shows the power consumption amount actual result table which is one of the control tables which the electric power control apparatus which concerns on Embodiment 5 refers.

  Hereinafter, a power control device according to an embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the embodiments described below.

Embodiment 1.
1 is a block diagram showing a configuration of a power control system including a power control device according to a first embodiment, and FIG. 2 is a block diagram showing a configuration of a power control device according to the first embodiment. 3 is a block diagram showing an example of a hardware configuration for realizing a control function in the power control device according to the first embodiment, and FIG. 4 is a flowchart showing a flow of processing in the power control device according to the first embodiment. Is. Hereinafter, the power control device according to the first embodiment will be described with reference to the drawings of FIGS. 1 to 4.

  As shown in FIG. 1, the power control system includes a power generation facility 1 as a power generation device, a power system 2, a power storage facility 4 as a power storage device, and a power control device 6 connected to the power generation facility 1 and the power storage facility 4. Including. One example of the power generation equipment 1 is a solar power generation device. The power generation facility 1 is connected to the power system 2. The output power of the power generation facility 1 is supplied to the power grid 2. A power transfer sensor 3 is arranged between the power generation facility 1 and the power system 2. The power transfer sensor 3 measures the power transfer amount between the power generation facility 1 and the power grid 2. The power storage facility 4 is also connected to the power system 2. The input / output power of the power storage equipment 4 is measured by the power storage equipment 4 itself. The power storage facility 4 stores the charge / discharge information 10 that is the charge / discharge power value when the rechargeable battery is performing the charge operation or the discharge operation, and the device information 12 that represents the upper limit value of the chargeable / dischargeable power, in the power control device 6. Output to.

  The power control device 6 uses the generated power information 14 of the power generation facility 1, the power supply amount 16 to the power system 2 measured by the transferred power sensor 3, and the output control information 18 input from the outside, and the power storage device 4 The output of the power generation equipment 1 is controlled while controlling the charge / discharge amount.

  As shown in FIGS. 1 and 2, the power control device 6 includes an output control information receiving unit 60 that receives output control information 18 from the outside, and a sensor that receives the power supply amount 16 measured by the transferred power sensor 3. An information receiving unit 62 and a control unit 64 that limits the amount of power generation of the power generation equipment 1 and controls the amount of charge / discharge of the power storage equipment 4 are provided.

  As a transmission source of the output control information 18, a power supplier such as a power company is exemplified. In the present embodiment, it is assumed that the power control device 6 is installed at a place other than that of the power supplier. In this case, the output control information 18 output to the power control device 6 becomes control information transmitted from a remote place.

  When controlling the output of the power generation equipment 1, the control unit 64 transmits a power generation equipment output control signal 20 that is a first control signal to the power generation equipment 1. In addition, when controlling the charge / discharge amount of power storage equipment 4, control unit 64 transmits charge / discharge control signal 22 that is a second control signal to power storage equipment 4.

  An example of the power control device 6 is a HEMS (Home Energy Management System) controller. FIG. 3 illustrates the hardware configuration of the HEMS controller. As shown in FIG. 3, the HEMS controller has a CPU (Central Processing Unit) 100 and a memory 102. Each function of the power control device 6 is stored in the memory 102 as a program. The CPU 100 reads out and executes the program stored in the memory 102. As a result, the above functions are realized. However, the power control device 6 is not limited to the HEMS controller. Part or all of the functions of the power control device 6 may be provided and executed by an external server or a mobile device. In addition, some or all of the functions of the power control device 6 may be executed by linking the external server and the mobile device. The power control device 6 is expressed including these. The same applies to the following.

  Next, a specific operation of the power control device 6 according to the first embodiment will be described with reference to the drawing of FIG. In addition, in each flow of FIG. 4, the notation of the reference numerals attached to the components and the signals is omitted. Further, the amount of power transfer measured by the power transfer sensor 3 is treated as positive in the direction from the power generation facility 1 to the power system 2. This also applies to the following description.

  First, the power control device 6 determines whether or not the input output control information 18 requires the limitation of the power generation output, that is, the output limitation of the power generation equipment 1 (step S101). When the limitation of the power generation output is not required (step S101, No), the power control device 6 does not limit the output of the power generation equipment 1 (step S102) and returns to the process of step S101.

  When it is necessary to limit the power generation output (Yes in step S101), the power control device 6 determines whether or not the value of the transmitted / received power sensor 3 is equal to or less than the set value (step S103). When the value of the transmitted / received power sensor 3 is less than or equal to the set value (step S103, Yes), the power control device 6 does not limit the output of the power generation equipment 1 (step S102) and returns to the process of step S101. On the other hand, when the value of the transferred power sensor 3 exceeds the set value (No in step S103), the power control device 6 adjusts the charging power of the power storage facility 4 so that the value of the transferred power sensor 3 becomes equal to or less than the set value. (Step S104).

  After the process of step S104, the power control device 6 determines whether or not the value of the transferred power sensor 3 is equal to or less than the set value within the adjustment range of the charging power of the power storage equipment 4 (step S105). When the value of the transmitted / received power sensor 3 is less than or equal to the set value (Yes in step S105), the power control device 6 does not limit the output of the power generation equipment 1 (step S102) and returns to the process of step S101. On the other hand, when the value of the transferred power sensor 3 does not fall below the set value (step S105, No), the power control device 6 limits the output of the power generation equipment 1 so that the value of the transferred power sensor 3 falls below the set value. Then (step S106), the process returns to step S101.

  The main operation of the power control device 6 according to the first embodiment is as described above, and the power control device 6 repeats the processes of steps S101 to S106 described above.

  In the determination process of steps S103 and S105, “Yes” is determined when the value of the power transfer sensor 3 is equal to the set value, but it may be determined as “No”. That is, the case where the value of the transmitted / received power sensor 3 is equal to the set value may be determined as “Yes” or “No”.

  The operation of the first embodiment described above is summarized as follows.

(1) When the output control information 18 input from the outside does not need to limit the output of the power generation equipment 1, the power control device 6 does not limit the output to the power generation equipment 1.
(2) Even when the output control information 18 requires the output of the power generation equipment 1 to be limited, when the power supply amount 16 is equal to or less than the set value, the power control device 6 outputs to the power generation equipment 1. Do not limit.
(3) As the setting value in (2), a threshold value set in advance can be used.
(4) When the output control information 18 requires the output of the power generation equipment 1 to be limited, and when the power supply amount 16 exceeds the set value, the power control device 6 determines that the power supply amount 16 The power storage facility 4 is instructed to increase the charging power so that the value becomes less than or equal to the set value. At this time, the power control device 6 does not limit the output to the power generation equipment 1.
(5) However, even if the power control device 6 increases the charging power to the maximum so that the power supply amount 16 becomes less than or equal to the set value for the power storage equipment 4, the power supply amount 16 does not become less than or equal to the set value. The power control device 6 limits the output to the power generation equipment 1 so that the power supply amount 16 becomes equal to or less than the set value.

  According to the power control device 6 according to the first embodiment, even when it is necessary to limit the output of the power generation equipment 1 by the output control information 18, the limitation condition of the generated power of the power generation equipment 1 can be relaxed. There is an effect that the generated power of the power generation facility 1 can be effectively used.

  According to the power control device 6 according to the first embodiment, even when it is necessary to limit the output of the power generation equipment 1 by the output control information 18, the energy is stored in the power storage equipment 4 to supply the power to the grid 16 Since it is possible to suppress the power consumption within the set value, it is possible to operate the power generation equipment 1 without limiting the output within the capacity of the power storage equipment 4, and thus it is possible to effectively utilize the generated power of the power generation equipment 1. The effect is that

  Further, according to the power control device 6 according to the first embodiment, the charge / discharge control of the power storage equipment 4 is made to follow at high speed and continuously by the output control information 18 supplied from the outside and the value of the transferred power sensor 3. Is possible, and as a result, there is an effect that the power transferred to and from the system can be controlled to a set value with high accuracy.

  Further, if the power storage equipment 4 in the power control system of the first embodiment is configured by using an element such as a lithium-ion battery that can perform high-speed charge / discharge control, the power supply amount 16 can be controlled at high speed. Therefore, there is an effect that a power control system having high responsiveness and controllability can be configured.

  The set value as the control target of the power supply amount 16 is determined in consultation with a business operator who manages the power system, but it is preferable to control the power supply amount to approach 0 watt. If the control target of the power supply amount 16 is set to zero watt or a value equivalent to zero watt, reverse power flow to the power system 2 can be prevented, so that the influence on the power system 2 can be reduced and the generated power of the power generation facility 1 can be reduced. You can use it effectively.

Embodiment 2.
FIG. 5 is a block diagram showing the configuration of a power control system including the power control device according to the second embodiment. In the power control system according to the second embodiment, in the configuration of the power control system according to the first embodiment shown in FIG. 1, an electric device group 8 and a power consuming device group 9 are added as constituent elements of the system.

  The electric device group 8 is connected to the electric power system 2. The electric device group 8 can exchange device information, power consumption information, device control information such as operation stop, or signals with the power control device 6. In FIG. 5, information transmitted from the electric device group 8 to the power control device 6 is shown as device information 12 a and power consumption information 26. A signal transmitted from the power control device 6 to the electric device group 8 is shown as a device control signal 24.

  Examples of the electric equipment group 8 include an air conditioner, a washer / dryer, a dishwasher / dryer, and an eco-cute, which can be controlled from the outside. The device information 12a transmitted to the power control device 6 by the electric device group 8 includes information about what kind of device the electric device group 8 itself is and information on the rated value of power consumption. The device control signal 24 transmitted from the power control device 6 to the electric device group 8 includes a control signal related to device control such as operation stop.

  The power consumption device group 9 is also connected to the power system 2. The electric devices forming the power consuming device group 9 are positioned as devices other than the electric device group 8 among the electric devices connected to the power system 2. That is, the power consuming device group 9 is a device group including one or a plurality of electric devices that cannot exchange information with the power control device 6. The electric appliances that compose the power consuming appliance group 9 include general home appliances such as TVs and refrigerators.

  The power consumption of the electric device group 8 and the power consumption device group 9 is measured by the power consumption sensor 7. The measured power consumption indicates the power consumption value at the time of measurement, and is transmitted to the power control device 6 as actual power consumption information. The other constituent elements are the same as or equivalent to those in the first embodiment, and the same reference numerals are given and the duplicated description is omitted.

  Next, a specific operation of the power control device 6 according to the second embodiment will be described with reference to the drawing in FIG. FIG. 6 is a flowchart showing the flow of processing in the power control device according to the second embodiment. In addition, in each flow of FIG. 6, the notation of the reference numerals attached to the components and the signals is omitted.

  In FIG. 6, the processing of steps S101 to S106 has the same or equivalent processing content as indicated by the same reference numerals as the corresponding portions in the flow of FIG. Therefore, the contents of the processing will be described from the step S105.

  The power control device 6 determines whether or not the value of the transferred power sensor 3 is equal to or less than a set value within the adjustment range of the charging power of the power storage equipment 4 (step S105). When the value of the transmitted / received power sensor 3 is less than or equal to the set value (Yes in step S105), the power control device 6 does not limit the output of the power generation equipment 1 (step S102) and returns to the process of step S101. On the other hand, when the value of the transferred power sensor 3 is not less than or equal to the set value (step S105, No), the power control device 6 operates the electric device group 8 so that the value of the transferred power sensor 3 is less than or equal to the set value. (Step S201).

  After the process of step S201, the power control device 6 determines whether or not the value of the transferred power sensor 3 is equal to or less than the set value by controlling the electric device group 8 and the power storage equipment 4 (step S202). When the value of the transmitted / received power sensor 3 is less than or equal to the set value (Yes in step S202), the power control device 6 does not limit the output of the power generation equipment 1 (step S102) and returns to the process of step S101. On the other hand, when the value of the transferred power sensor 3 does not fall below the set value (step S202, No), the power control device 6 limits the output of the power generation equipment 1 so that the value of the transferred power sensor 3 falls below the set value. Then (step S106), the process returns to step S101.

  The main operation of the power control device 6 according to the second embodiment is as described above, and the power control device 6 repeats the above-described processing of steps S101 to S106, step S201, and step S202.

  In the determination processing of steps S103, S105, and S202 described above, when the value of the transmitted / received power sensor 3 and the set value are equal, it is determined as “Yes”, but it may be determined as “No”. . That is, the case where the value of the transmitted / received power sensor 3 is equal to the set value may be determined as “Yes” or “No”.

  The operation of the second embodiment described above is summarized as follows.

(1) When the output control information 18 input from the outside does not need to limit the output of the power generation equipment, the power control device 6 does not limit the output to the power generation equipment 1.
(2) Even when the output control information 18 needs to limit the output of the power generation equipment 1, when the power supply amount 16 is less than or equal to the set value, the power control device 6 outputs the output to the power generation equipment 1. Do not limit.
(3) As the setting value in (2), a threshold value set in advance can be used.
(4) When the output control information 18 requires the output of the power generation equipment 1 to be limited, and when the power supply amount 16 exceeds the set value, the power control device 6 determines that the power supply amount 16 The power storage facility 4 is instructed to increase the charging power so that the value becomes less than or equal to the set value. At this time, the power control device 6 does not limit the output to the power generation equipment 1.
(5) The power control device 6 acquires power consumption information of the electric device group 8 and operation availability information in advance. When the power control device 6 increases the charging power to the maximum so that the power supply amount 16 becomes less than or equal to the set value for the power storage equipment 4, the power control device 6 does not become less than or equal to the set value. 6 consumes electric power by operating and controlling the electric device group 8 in accordance with the power consumption information and the driving availability information of the electric device group 8 and the electric device group 8 and the electricity storage so that the power supply amount 16 becomes equal to or less than a set value. Control the equipment 4. At this time, the power control device 6 does not limit the output to the power generation equipment 1.
(6) Even if the electric power control device 6 controls the electric device group 8 and the power storage equipment 4 to the maximum so that the electric power supply amount 16 becomes the set value or less, the electric power supply amount 16 does not become the set value or less. In this case, the power control device 6 limits the output to the power generation equipment 1 so that the power supply amount 16 becomes equal to or less than the set value.

  According to the power control device 6 according to the second embodiment, even when it is necessary to limit the output of the power generation equipment 1 by the output control information 18, the energy is stored in the power storage equipment 4, and the electric equipment group 8 is used. By operating so as to consume electricity, the power supply amount 16 to the power system 2 can be suppressed within the set value, and if the power storage facility 4 and the electric equipment group 8 are within the power consumption capacity of electricity. Since the output of the power generation equipment 1 can be operated without being limited, the generated power of the power generation equipment 1 can be effectively utilized.

  Further, if the power storage equipment 4 in the power control system of the second embodiment is configured by using an element such as a lithium-ion battery that can perform charge / discharge control at high speed, the power supply amount 16 can be controlled at high speed. Therefore, there is an effect that a power control system having high responsiveness and controllability can be configured.

  Note that the electric device group 8 is generally difficult to continuously control power consumption, and there are restrictions such as slow control response. However, by controlling the power storage equipment 4, it is possible to perform high-speed and fine control as a system. Furthermore, by operating the electric equipment group 8 in accordance with the control of the power storage equipment 4 and consuming the generated power of the power generation equipment 1, it is possible to directly utilize the electric energy without going through the charge and discharge of the power storage equipment 4. Therefore, there is an effect that the energy use efficiency can be increased.

  In the flow of FIG. 6, an example in which the control of the power storage equipment 4 is first performed as the control when the output control information 18 is received is described, but the control of the electric device group 8 may be performed in advance. Good. Even if the electric equipment group 8 is controlled without controlling the power storage equipment 4, there is an effect that the energy utilization efficiency can be increased.

  Further, in the flow of FIG. 6, as the control when the output control information 18 is received, the case where the control of the power storage equipment 4 is performed first and the control of the electric device group 8 is performed later is illustrated. The control may be performed at the same time, and the same effect can be obtained.

  The value of the power consumption sensor 7 is obtained by adding or subtracting the generated power information 14, which is the value of the generated power of the power generation equipment 1, the value of the transferred power sensor 3, and the value of the charge / discharge power of the power storage equipment 4, The power consumption sensor 7 may be omitted. If the power consumption sensor 7 is omitted, the product cost can be reduced and the installation work can be saved.

Embodiment 3.
FIG. 7 is a block diagram showing the configuration of a power control system including the power control device according to the third embodiment. In the power control system according to the third embodiment, the power storage equipment 4 is omitted from the configuration of the power control system according to the second embodiment shown in FIG. Others are the same as or equivalent to the configuration of the second embodiment shown in FIG. 5, the same components are designated by the same reference numerals, and the duplicate description will be omitted.

  FIG. 8 is a flowchart showing the flow of processing in the power control device according to the third embodiment. In each flow of FIG. 8, the notations of symbols attached to the components and signals are omitted. Note that in FIG. 8, the processing of steps S101 to S103 and step S106 has the same or equivalent processing content as the processing of the same reference numeral in the flow of FIG. 4, and the processing of step S201 in the flow of FIG. Since the processing content is the same as or equivalent to the processing of the same reference numeral, the description of each flow is omitted.

  After the process of step S201, the power control device 6 determines whether or not the value of the transferred power sensor 3 is equal to or less than the set value under the control of the electric device group 8 (step S301). When the value of the transmitted / received power sensor 3 is less than or equal to the set value (Yes in step S301), the power control device 6 does not limit the output of the power generation equipment 1 (step S102) and returns to the process of step S101. On the other hand, when the value of the transferred power sensor 3 does not fall below the set value (step S301, No), the power control device 6 limits the output of the power generation equipment 1 so that the value of the transferred power sensor 3 falls below the set value. Then (step S106), the process returns to step S101.

  In the power control system according to the third embodiment, when a device constituting the electric device group 8 is installed, the power control device 6 obtains the device information 12a of the device and sends it to the electric device group 8. Response information to the operation command, that is, change information of power consumption with respect to the command from the power control device 6 is collected.

  The power control device 6 can know the output control amount corresponding to the time zone of the day in advance from the output control schedule included in the output control information 18. Therefore, the power control device 6 is sufficient to keep the power supplied to the power system 2 within the set value based on the current generated power of the power generation facility 1 and the change information of the power consumption with respect to the command of the electric device group 8. A driving command can be transmitted to the possible electric equipment group 8. As a result, the power control system operates so that the power supplied to the power system 2 is within the set value.

  The power control device 6 has previously learned the change in the power consumption of the electric device group 8 after transmitting the operation command. Therefore, the operation instruction can be issued in consideration of the learning content, so that the electric power supplied to the electric power system 2 can be controlled within the set value. Further, since a system that does not require the power storage facility 4 can be configured, it is possible to expect a long service life and high reliability of the system while keeping the system construction cost low.

Fourth Embodiment
FIG. 9 is a block diagram showing the configuration of a power control system including the power control device according to the fourth embodiment. In FIG. 9, the input and output of the power storage equipment 4 are directly connected to the power generation equipment 1. Specifically, it is a form in which the input and output of the power storage equipment 4 is a direct current voltage and is connected directly to the power generation equipment 1 such as connecting to the DC side of an inverter provided in the power generation equipment 1. Note that other configurations are the same as or equivalent to those in the second embodiment, and the same components are designated by the same reference numerals and redundant description will be omitted.

  FIG. 10 is a block diagram showing an internal configuration example for realizing the power control device 6 according to the second embodiment, and FIG. 11 is an internal configuration for realizing the power control device 6 according to the fourth embodiment. It is a block diagram which shows an example. Both FIG. 10 and FIG. 11 describe, as an example, a mode in which the power generation equipment 1 converts direct current power into alternating current using an inverter and supplies power to the power system 2.

  In the case of the power control system according to the second embodiment, as shown in FIG. 10, the power generation facility 1 includes a generator 1a and an inverter 1b, and the power storage facility 4 includes a converter 4a, a charge control unit 4b, and a storage battery 4c. ing. Further, in the case of the power control system according to the fourth embodiment, as shown in FIG. 11, the power generation facility 1 includes a generator 1a and an inverter 1b, and the power storage facility 4 includes a charge control unit 4b and a storage battery 4c. There is. As is clear from the comparison between the two, in the case of the fourth embodiment, the converter 4a is omitted in the electricity storage equipment 4.

  When the generated power of the power generation equipment 1 is sent to the power storage equipment 4, in the configuration of the second embodiment, the power of the generator 1a is converted from direct current to alternating current by the inverter 1b built in the power generation equipment 1, and the power system 2 is supplied. After the output, it is necessary to convert from alternating current to direct current by the converter 4a built in the power storage equipment 4 and store the power in the storage battery 4c.

  On the other hand, in the configuration of the fourth embodiment, as shown in FIG. 11, the output end of the generator 1a in the power generation facility 1 and the charging control unit 4b of the power storage facility 4 are directly connected to each other, and the generated power of the power generation facility 1 is , Can be sent to the electricity storage equipment 4 without going through the inverter 1b. That is, in the case of the configuration of the fourth embodiment, it is necessary to convert the direct current to the alternating current by the inverter 1b of the power generation equipment 1 and the conversion from the alternating current to the direct current by the converter 4a of the power storage equipment 4 as in the second embodiment. There is no. Therefore, the configuration of the fourth embodiment has an effect that electricity can be stored without generating a loss for conversion.

  In addition, in the fourth embodiment, since the configuration of the conversion device in the entire system can be simplified, there is an effect that the cost for constructing the system can be reduced and the devices constituting the system can be downsized.

  Further, in the fourth embodiment, since the electric power from the power generation facility 1 to the power storage facility 4 can be sent to the power storage facility 4 without being sent to the power system 2, it is applied to the power system 2 as compared with the second embodiment. There is an advantage that the influence is small.

  In the configuration of the fourth embodiment, if the inverter 1b that converts the DC power generated by the generator 1a into AC is additionally provided with the function of converting the AC power of the power system 2 into DC. The function of charging the storage battery 4c with the electric power of the power system 2 can also be realized.

Embodiment 5.
FIG. 12 is a block diagram showing a configuration of a power control system including a power control device according to the fifth embodiment. In the power control system according to the fifth embodiment, weather information 28 is added as input information to the power control device 6 in the configuration of the power control system according to the fourth embodiment shown in FIG. The weather information 28 can be obtained from the Internet or the like. Note that other configurations are the same as or equivalent to those in the second embodiment, and the same components are designated by the same reference numerals and redundant description will be omitted.

  FIG. 13 is a block diagram showing functional blocks and processing flows for implementing the functions of the power control device 6 according to the fifth embodiment. 14 to 16 are diagrams showing an example of a control table referenced by the power control device 6 according to the fifth embodiment. Table A is an output control schedule, table B is a power generation amount actual result table, and table C is. It is a power consumption amount actual result table.

  Next, the control table shown in FIGS. 14 to 16 will be described.

  In the output control schedule A, as shown in FIG. 14, the column direction in the table is a specific date, and the time is divided in the row direction every 30 minutes. Further, in the table, the output control percentage with respect to the value set as the output capacity of the power generation equipment 1 is shown as the set value for each divided time zone. For example, it is shown that the control is performed at 50% from 11:30 to 12:00 on January 2nd.

  As shown in FIG. 15, in the power generation result table B, the acquired weather information 28 is associated with the season and time information. For example, with the column direction as seasonal information, March to June are spring, and July to September. Is classified as summer, October-November as autumn, December-February as winter, and the type of weather is classified as rain, cloudy, or sunny, and the time is divided every 30 minutes in the row direction. The power generation performance values of the power generation facility 1 are averaged and stored for a plurality of days according to seasons, weather, and time zones. As described above, the power generation amount table B is a table in which the power generation amount results corresponding to seasons, time zones, and weather are stored for each season.

  Further, as shown in FIG. 16, the power consumption record table C is divided into the same table divisions as the power generation record table B in the column direction and the row direction. Specifically, the power consumption performance information 30 from the power consumption sensor 7 is integrated for each corresponding time zone, and the integrated value of the power consumption performance information 30 is averaged for a plurality of days by season, weather, and time zone. To store. As described above, the power consumption record table C is a table in which the power consumption records corresponding to seasons, time zones, and weather are stored for each season.

  Note that both the power generation amount actual result table B and the power consumption amount actual result table C can be tables including day of the week conditions as necessary.

  As shown in FIG. 13, the power control device 6 extracts the information included in the input output control information 18 and retains it as an output control schedule, and the input generated power information 14 for the weather and season. A functional block 41 serving as a computing unit and a storage unit that performs averaging processing by time, and a functional block 42 serving as a computing unit and a storage unit that averages the input power consumption performance information 30 by weather, season, and time. A function block 43 as a receiving unit and a storage unit that receives the input weather information 28 and stores it as weather information for each time zone, a function block 44 having a calendar function and a clock function, and the above-described power generation amount actual table. A functional block 45 as a storage unit for holding the same, a functional block 46 as a storage unit for holding the above-mentioned power consumption amount actual result table, The functional block 47 as an arithmetic unit for calculating the output control quantity, a.

  The power control device 6 refers to the weather information for each time zone, the output control schedule, the calendar, the clock, the power generation amount actual result table, and the power consumption amount actual result table to calculate the power generation trend and the consumption trend for the day.

  FIG. 13 shows an example in which the storage battery discharge amount 32 is generated as the output control amount in a certain time zone of the day (here, it is referred to as “first time zone”). This example will be described below.

  When it is estimated that it is necessary to limit the generated power of the power generation equipment 1 in the first time period in the first time period, the power control device 6 determines in the first time period in which the generated power need be limited. By the time it reaches the storage battery discharge amount 32, which is a discharge amount for operating to discharge the electric power stored in the power storage facility 4 in advance, is generated. The generated storage battery discharge amount 32 is included in the charge / discharge control signal 22 shown in FIG. 12, and is transmitted to the power storage facility 4. The power storage facility 4 discharges the stored power according to the received storage battery discharge amount 32.

  As described above, when it is determined that it is necessary to limit the output of the power generation device in the first time period based on the output control schedule, the power generation amount actual result table, and the power consumption actual result table, the first time period The stored electric power of the electric storage equipment 4 is discharged in advance by the time when the electric power is reached. In this way, the storage capacity of the power storage facility 4 can be secured when the need for power storage arises, so that the generated power of the power generation facility 1 can be utilized without being limited.

  Note that the configurations shown in the above embodiments are examples of the functions according to the present invention, and any specific configuration is possible as long as the functions can be realized. Further, the configurations shown in the above embodiments can be combined with other known techniques, and a part of the configurations can be omitted or changed without departing from the scope of the present invention. is there.

  1 power generation equipment, 1a generator, 1b inverter, 2 power system, 3 power transfer sensor, 4 storage equipment, 4a converter, 4b charge control unit, 4c storage battery, 6 power control device, 7 power consumption sensor, 8 electrical equipment group , 9 power consumption equipment group, 10 charge / discharge information, 12, 12a equipment information, 14 power generation information, 16 power supply amount, 18 output control information, 20 power generation equipment output control signal, 22 charge / discharge control signal, 24 equipment control signal , 26 power consumption information, 28 weather information, 30 power consumption performance information, 32 storage battery discharge amount, 40 to 47 functional block, 60 output control information receiving unit, 62 sensor information receiving unit, 64 control unit, 100 CPU, 102 memory.

Claims (8)

A power control device connected to a power generation device that generates and outputs power and a power storage device that stores the power output from the power generation device,
An output control information receiving unit that receives output control information that limits the output of the power generation device,
When receiving the output control information, a control unit that increases the amount of power stored in the power storage device such that the amount of power supplied from the power generation device to the power system is equal to or less than a threshold value,
A storage unit that stores the power generation amount of the power generation device in a plurality of time zones as a power generation amount actual result table and stores the power consumption amount of one or a plurality of electric devices in a plurality of time periods as a power consumption amount actual result table,
Equipped with
The control unit receives an output control amount of the power generation device in a plurality of time zones included in the output control information as an output control schedule,
When it is determined that it is necessary to limit the output of the power generation device in the first time period based on the output control schedule, the power generation amount actual result table, and the power consumption amount actual result table, until the first time period In addition, the power control device is configured to control the power storage device so as to discharge the power stored in the power storage device. Wherein the control unit, wherein the power supply amount by increasing the storage amount of the power storage device when not become less than the threshold value, the power supply amount to limit the output of the power generator to be equal to or less than the threshold value The power control device according to claim 1. The control unit, when the power supply amount does not become the threshold value or less due to an increase in the storage amount of the power storage device, the power output from the power generation device to the power grid so that the power supply amount becomes the threshold value or less. The electric power control device according to claim 1, wherein the electric power is consumed by the electric device.   If the power supply amount does not become the threshold value or less due to an increase in the storage amount of the power storage device and power consumption in the electric device, the control unit generates the power so that the power supply amount becomes the threshold value or less. The power control device according to claim 3, wherein the output of the device is limited.   The power control device according to any one of claims 1 to 4, wherein the output of the power generation device is directly input to the power storage device as DC power. It is equipped with a receiving unit that receives weather information,
The power generation result table is the power generation amount in a plurality of time zones according to different weather conditions,
The power control device according to claim 1 , wherein the power consumption record table is power consumption in a plurality of time zones according to different weather conditions. The power control device according to any one of claims 1 to 6 , wherein the output control information is control information transmitted from a power supplier. The power control device according to any one of claims 1 to 7 , wherein the control unit controls the threshold value of the measured power supply amount so as to approach zero watts.

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