JP2019083644A - Power supply controller - Google Patents

Abstract

To suppress consumption of standby power in a power unit.SOLUTION: A power supply controller 7 includes: a standby capacity prediction part 74; and a power unit control part 75. During a first period T1, the standby capacity prediction part 74 predicts standby capacity of a power unit 5 required so that power supply from the power unit 5 to a power consumption device 6 does not run short in a second period T2 after the first period. The power unit control part 75 controls the power unit 5 so that an operation of the power unit 5 with the standby capacity predicted by the standby capacity prediction part 74 is performed at the start of the second period T2.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a power control device.

  Infrastructure equipment such as a communication base station includes a power supply device for supplying power consumption devices. In the example of the communication base station, the power supplied to the power consuming apparatus such as the communication apparatus is mainly direct current 48 V, and the power supply apparatus is, for example, a rectifying apparatus for converting alternating current power from a commercial power grid into direct current 48 V power. It has a function. From the viewpoint of disaster countermeasures, there is also known an infrastructure facility equipped with a power generation device that generates electric power using renewable energy such as solar power generation so that power supply backup can be performed in the event of a power failure (see Patent Document 1) ). By covering a part of the power consumed by the power consuming apparatus with the power generated by the power generating apparatus except during the power failure, the effect of reducing the purchase amount of commercial power can also be expected.

JP, 2014-59825, A

  The power (generated power) generated by the power generation device fluctuates according to, for example, the weather, and the power consumption of the power consumption device also fluctuates. As a result, the output power of the power supply also fluctuates. If the power supply apparatus is made to stand by so that the outputtable power (standby capacity) of the power supply apparatus becomes maximum in preparation for fluctuations in output power, a large amount of standby power will be consumed accordingly.

  This invention is made in view of the said subject, and it aims at providing the power supply control apparatus which can suppress consumption of the standby power in a power supply device.

  A power supply control device according to an aspect of the present invention is a power supply control device that controls a power supply device that supplies power to a power consumption device using at least one of power generated by a power generation device and power from a power network. A prediction unit that predicts a standby capacity of the power supply device necessary for preventing the power supply from the power supply device from being insufficient from the power supply device in the second period after the first period during the first period; and the prediction unit And a controller configured to control the power supply device such that operation of the power supply device at the standby capacity predicted by the control unit is performed at the start of the second period.

  According to the above power supply control device, the standby capacity of the power supply device required is predicted because the power supply from the power supply device to the power consuming device does not run out during the first period and the second period after the first period. . Then, operation of the power supply device with the predicted standby capacity is controlled to be performed at the start of the second period. Therefore, during the second period, it is possible to appropriately supply power from the power supply device to the power consuming device, and to suppress consumption of standby power in the power supply device.

  According to one aspect of the present invention, it is possible to suppress consumption of standby power in the power supply device.

It is a figure which shows the example of a structure of the electric power system in which the power supply control apparatus which concerns on embodiment is used. It is a figure which shows the example of a structure of a power supply device. It is a figure which shows the example of periodic control of the standby capacity of the power supply device by a power supply control apparatus. It is a figure which shows the example of a structure of a power supply control apparatus. It is a flowchart which shows the example of the process performed by a power supply control apparatus. It is a figure which shows another example of a structure of an electric power system. It is a flowchart which shows the example of the process performed by a power supply device. It is a block diagram which shows an example of the hardware constitutions of a power supply control apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description of the drawings, the same elements will be denoted by the same reference symbols and redundant description will be omitted.

  The power system in which the power control device according to the embodiment is used is used, for example, to supply power to a power consumption device such as a communication device in an infrastructure facility such as a communication base station. FIG. 1 is a diagram showing an example of the configuration of such a power system. In FIG. 1, the power paths between the elements are indicated by solid lines. The paths of control signals and / or communication signals between the elements are indicated by dashed lines.

  The power system 1 includes a power generation device 3, a power conditioner 4, a power supply device 5, a power consumption device 6, and a power control device 7. The power system 1 is connected to the power network 2 and can use power from the power network 2. When the power grid 2 is a commercial power grid, commercial power is purchased by the amount of use of power from the power grid 2. The power system 1 may also be connected to an external device 8, for example via a communication network (not shown).

  An example of the power generation device 3 is a power generation device that generates power using natural energy (renewable energy). When natural energy is solar energy, the power generation device 3 is a solar power generation device. The power (generated power) generated by the power generation device 3 is sent to the power conditioner 4. When the power from the power grid 2 can not be used due to a power failure or the like, the power generation device 3 can also be used as a backup power source.

  The power conditioner 4 converts the generated power of the power generation device 3 and outputs the converted power to the power path between the power supply device 5 and the power consumption device 6. A connection portion of the power conditioner 4, the power supply device 5 and the power consumption device 6 in the power path is referred to as a node N1 and illustrated. The power output from the power conditioner 4 is DC power (for example, 48 V DC) suitable to be supplied to the power consumption device 6.

  The power supply device 5 operates to supply power to the power consuming device 6 using AC power from the power grid 2. The power supply device 5 has a function as a rectifying device that converts AC power from the power grid 2 into DC power suitable to be supplied to the power consumption device 6.

  In the configuration shown in FIG. 1, the generated power of the power generation device 3 is supplied to the power consumption device 6 without passing through the power supply device 5. The power supply device 5 supplies power to the power consumption device 6 using power from the power grid 2. However, as will be described later with reference to FIG. 6, the generated power of the power generation device 3 may be supplied to the power consumption device 6 via the power supply device 5. That is, the power supply device 5 supplies power to the power consumption device 6 using at least one of the generated power of the power generation device 3 and the power from the power grid 2.

  An example of the configuration of the power supply device 5 will be described with reference to FIG. The power supply device 5 includes a plurality of power supply units 51 connected in parallel to one another, an operation monitoring / control unit 54, and a communication unit 55. The number of power supply units 51 is not limited to the example shown in FIG.

  The power supply unit 51 includes a switch 52 and an AC / DC converter 53 connected in series with each other. The switch 52 is provided between the AC / DC converter 53 and the power network 2 (FIG. 1), and is configured to be switched on / off. The AC / DC converter 53 converts AC power input through the switch 52 into DC power, and uses the AC power input as a power source. The magnitude of the maximum DC power that the AC / DC converter 53 can output is, for example, 2.5 kW. In this case, the rated operating capacity (rated capacity) of the power supply unit 51 is 2.5 kW. The maximum capacity of the power supply device 5 changes according to the number of power supply units 51 connected in parallel. For example, when four power supply units 51 rated at 2.5 kW are connected in parallel, the maximum capacity of the power supply device 5 is 10 kW (that is, 2.5 kW × = 10 kW).

  The power supply unit 51 can be switched between the hot standby and the cold standby in the operating state.

  When the switch 52 is turned on, the power supply unit 51 switches to hot standby. In hot standby, AC power is input to the AC / DC converter 53. In this case, the AC / DC converter 53 is performing a rectifying operation of converting AC power into DC power and outputting the DC power, or although not performing the rectifying operation, the rectifying operation can be performed immediately if necessary. . In this case, the AC / DC converter 53 is in a standby state in which at least a part of the input AC power is consumed as standby power. An example of standby power is operating power of a control circuit (not shown) in the AC / DC converter 53 and the like. The power supply unit 51 operating in the hot standby increases the standby capacity of the power supply 5, but also increases the standby power. In addition, the efficiency may be reduced at low load operation relative to the rating (2.5 kW).

  When the switch 52 is turned off, the power supply unit 51 switches to cold standby. In cold standby, AC power is not input to the AC / DC converter 53. As described above, since the AC / DC converter 53 uses AC power as a power source, in cold standby, the AC / DC converter 53 is in a power-off state. In this case, the AC / DC converter 53 does not perform the rectification operation. Also, the AC / DC converter 53 does not consume standby power. The power supply unit 51 operating in the cold standby reduces the standby capacity of the power supply 5, but also reduces the standby power.

  The operation monitoring and control unit 54 monitors the operation of each power supply unit 51 and switches the operation state. The operation monitoring includes determining whether each power supply unit 51 is operating in the hot standby mode or in the cold standby mode. Monitoring of operation may be performed, for example, by detecting the on and off states of the switch 52. The switching of the operating state is performed by switching the switch 52 on and off as described above.

  The communication unit 55 communicates with the outside of the power supply device 5. An example of the communication destination is the power control device 7 (FIG. 1). In accordance with a control signal (external control signal) sent from the power supply control device 7 to the communication unit 55, for example, switching of the operation state of each power supply unit 51 is controlled.

  Returning to FIG. 1, the power consumption device 6 is, for example, a communication device, and is a direct current load that operates by receiving supply of direct current power. An example of DC power is 48 V DC. The communication device may include a wireless device and an air conditioner required for the wireless device.

  The power supply control device 7 can exchange control signals with the power conditioner 4 and the power supply device 5. The power control device 7 can also communicate with an external device 8 provided outside the power system 1.

  The power supply control device 7 controls the operation of the power supply device 5. This operation control includes adjustment of the standby capacity of the power supply device 5. In the present embodiment, the power supply control device 7 adjusts the standby capacity of the power supply device 5 so as to be the standby capacity necessary for the power supply from the power supply device 5 to the power consuming device 6 not to be insufficient. This adjustment may be performed periodically.

  Adjustment of the standby capacity of the power supply device 5 by the power supply control device 7 will be described with reference to FIG. The horizontal axis of the graph shown in FIG. 3 indicates time, and the vertical axis indicates the standby capacity of the power supply 5. In this example, the standby capacity of the power supply device 5 is adjusted at a predetermined cycle (for example, every 10 minutes). Specifically, the standby capacity of the power supply device 5 is 10 kW for the time t1 to t2, 7.5 kW for the time t2 to t3, 5 kW for the time t3 to t4, and 7. for the time t4 to t5. It is adjusted to be 7.5 kW even between 5 kW and time t5 to t6.

  The power supply control device 7 predicts the standby capacity of the power supply device 5 required in the second period T2 after the first period (for example, immediately after the first period) during the first period T1, and uses the predicted standby capacity. The power supply device 5 is controlled such that the operation of the power supply device 5 is performed at the start of the second period T2. The necessary standby capacity of the power supply device 5 is a standby capacity necessary to prevent the power supply from the power supply device 5 to the power consuming device 6 from being insufficient in the second period. When adjustment of the standby capacity of the power supply device 5 by the power supply control device 7 is periodically performed, each of the first period T1 and the second period T2 may configure the period.

  In the example of FIG. 3, during time t1 to t2, the power supply control device 7 predicts the standby capacity (7.5 kW in this example) of the required power supply 5 at time t2 to t3. Then, the power supply device 5 is controlled such that the operation of the power supply device 5 with the predicted standby capacity is performed at time t2. In this case, time t1 to t2 is the first period T1, and time t2 to t3 is the second period T2. Time t2 is the start time of the second period T2. In time t2 to t3, the power supply device 5 operates at a standby capacity of 7.5 kW.

  During time t2 to t3, the power supply control device 7 predicts the standby capacity (5 kW in this example) of the required power supply device 5 at time t3 to t4. Then, the power supply device 5 is controlled such that the operation of the power supply device 5 with the predicted standby capacity is performed at time t3. In this case, time t2 to t3 is the first period T1, and time t3 to t4 is the second period T2. Time t3 is the start time of the second period T2. In time t3 to t4, the power supply device 5 operates at a standby capacity of 5 kW.

  During time t3 to t4, the power supply control device 7 predicts the standby capacity (7.5 kW in this example) of the power supply device 5 required at time t4 to t5. Then, the power supply device 5 is controlled such that the operation of the power supply device 5 with the predicted standby capacity is performed at time t4. In this case, time t3 to t4 is the first period T1, and time t4 to t5 is the second period T2. Time t4 is the start time of the second period T2. From time t4 to t5, the power supply device 5 operates at a standby capacity of 7.5 kW.

  During time t4 to t5, the power supply control device 7 predicts the standby capacity (7.5 kW in this example) of the power supply device 5 required at time t5 to t6. Then, the power supply device 5 is controlled such that the operation of the power supply device 5 with the predicted standby capacity is performed at time t5. In this case, time t4 to t5 is the first period T1, and time t5 to t6 is the second period T2. Time t5 is the start time of the second period T2. Also at time t5 to t6, the power supply device 5 continues operating with a standby capacity of 7.5 kW.

  In this manner, operation control of the power supply device 5 by the power supply control device 7, more specifically, prediction and adjustment of the standby capacity of the power supply device 5 are periodically performed.

  Returning to FIG. 1, the external device 8 stores various information necessary for the processing of the power control device 7 and provides the information to the power control device 7. The information stored in the external device 8 can be used to predict the power generated by the power generation device 3 and to predict the power consumption of the power consumption device 6. Such information may include, for example, information indicating weather conditions such as weather, weather data of temperature, satellite image, and all-sky image data. Besides this, the information may include the power generated by the power generation device 3 in the past and the power consumption of the power consumption device 6. For example, the power supply control device 7 periodically (eg every few minutes) acquires data indicating the generated power of the power generation device 3 from the power conditioner 4 in response to a request for the power conditioner 4 and transmits it to the external device 8 You may Similarly, the power supply control device 7 may acquire data indicating the power consumption of the power consumption device 6 and transmit the data to the external device 8. For example, the power supply control device 7 periodically (for example, every few minutes) of data necessary for predicting the generated power of the power generation device 3 and the power consumption of the power consuming device 6 to the external device 8. And, according to the request for the external device 8, it acquires from the external device 8.

  FIG. 4 is a diagram showing an example of the configuration of the power supply control device 7. The power supply control device 7 includes a communication unit 71, a generated power prediction unit 72, a power consumption prediction unit 73, a standby capacity prediction unit 74, a power supply control unit 75, and a data storage unit 76.

  The communication unit 71 communicates with the outside of the power control device 7. Examples of communication destinations are the power conditioner 4, the power supply device 5, and the external device 8 (FIG. 1).

  The generated power prediction unit 72 predicts the generated power of the power generation device 3. As described above with reference to FIG. 1, the power generation device 3 generates power using natural energy such as a solar power generation device. In order to predict the generated power of the power generation device 3 as described above, the generated power prediction unit 72 may use various information provided by the external device 8 via the communication unit 71. For example, the generated power prediction unit 72 acquires, from the external device 8 during the first period T1, data indicating a factor that may affect the generated power of the power generation device 3 during the second period T2, and acquires The predicted value of the minimum power generated by the power generation device 3 during the second period T2 may be calculated using the data. For example, when the data indicates a weather condition such as weather, weather data of air temperature, satellite image, or whole sky image data, the generated power prediction unit 72 may calculate a predicted value based on each data. Since various known methods can be used for specific calculation, the description is omitted here. The data may include not only data indicating weather conditions, but also various other data such as past statistical data. The predicted value of the generated power of the power generation device 3 predicted by the generated power prediction unit 72 may be a value in consideration of the generated power reduction risk of the power generation device 3. For example, a predicted value may be a value obtained by subtracting a predetermined value or a predetermined ratio from the predicted value of the generated power of the power generation device 3 calculated based on the data acquired from the external device 8.

  The power consumption prediction unit 73 predicts the power consumption of the power consumption device 6. For example, the power consumption prediction unit 73 acquires, from the external device 8 during the first period T1, data indicating factors that may affect the power consumption of the power consumption device 6 during the second period T2, The predicted value of the maximum power consumed by the power consumption device 6 during the second period T2 may be calculated using the acquired data. For example, when the data indicates a weather condition such as weather data of weather or temperature, the power consumption prediction unit 73 may calculate the predicted value of the maximum power consumption of the power consumption device 6 based on each data. The data may include not only data indicating weather conditions, but also various other data such as past statistical data. The predicted value of the power consumption of the power consumption device 6 predicted by the power consumption prediction unit 73 may be a value in consideration of the power consumption increase risk of the power consumption device 6. For example, a predicted value may be a value obtained by adding a predetermined value or a predetermined ratio from the predicted value of the power consumption of the power consumption device 6 calculated based on the data acquired from the external device 8.

  The standby capacity prediction unit 74 predicts the standby capacity of the power supply device 5 required in the second period T2. The standby capacity is a standby capacity of the power supply device 5 necessary for the power supply from the power supply device 5 to the power consuming device 6 not to be insufficient in the second period T2, as described above. Based on the predicted value of the minimum generated power calculated by the generated power prediction unit 72 and the predicted value of the maximum power consumption of the power consuming device 6 calculated by the power consumption prediction unit 73, the standby capacity prediction unit 74 The predicted value of the maximum standby capacity of the power supply device 5 required in the two periods T2 is calculated.

  An example of calculation by the generated power prediction unit 72, the power consumption prediction unit 73, and the standby capacity prediction unit 74 will be described.

First, the generated power prediction unit 72 calculates the predicted value A _T2 (kW) of the minimum generated power of the power generation device 3 in the second period T2. Next, the power consumption prediction unit 73 calculates the predicted value B _T2 (kW) of the maximum power consumption of the power consumption device 6 in the second period T2. Then, the standby capacity prediction unit 74 sets the estimated value X _T2 (kW) of the standby capacity (maximum operating capacity) of the power supply device 5 required in the second period T2 as X _T2 = B _T2 −A _T2 (kW) calculate.

  If the standby capacity predicted by the standby capacity predicting section 74 is larger or smaller than the current standby capacity, the power supply apparatus control unit 75 adjusts the standby capacity of the power supply apparatus 5 at the start of the second period T2, and the predicted standby The power supply device 5 is controlled to approximate (including matching) the capacity. For example, the standby capacity of the power supply device 5 is adjusted to the smallest standby capacity that can be selected in a range that does not fall below the predicted standby capacity. When the calculated standby capacity is equal to the current standby capacity, the control of the power supply apparatus 5 is not performed to cause the power supply apparatus 5 to maintain the current standby capacity.

  The adjustment of the standby capacity of the power supply device 5 is, for example, the hot standby (standby state) of a plurality of power supply units 51 (power supply unit group) built in the power supply device 5 as described above with reference to FIG. , Cold standby (power off) by controlling the number of units.

For example, in the first period T1, the total capacity of the power supply unit 51 in hot standby, that is, the standby capacity X _T1 of the power supply device 5 is 10 (kW) (for example, four power supply units 51 of 2.5 (kW)) It is assumed that On the other hand, the predicted value A _T2 = 2.5 (kW) of the minimum power generation of the power generation device 3 in the second period T2 and the predicted value B _T2 = 10 (kW) of the maximum power consumption of the power consumption device 6 Then, the predicted value X _T2 of the standby capacity (maximum operating capacity) of the power supply device 5 required in the second period T2 is calculated as X _T2 = 10-2.5 = 7.5 (kW). Since the calculated predicted value (7.5 kW) of the standby capacity is smaller than the current standby capacity X _T1 (10 kW), the power supply control unit 75 predicts the standby capacity of the power supply 5 at the start of the second period T2. The standby capacity of the power supply device 5 is controlled to be the value X _T2 (7.5 kW). For example, the number of power supplies 51 in the hot standby is adjusted to three. If the number of power supply units 51 is four in all, the number of power units 51 in cold standby is adjusted to one. As a result, standby power in the power supply device 5 is reduced as compared to the case where standby is performed at X _T2 = X _T1 = 10 (kW) without performing control.

  As described above, when adjusting the number of power supplies 51 in the hot standby and the number of power supplies 51 in the cold standby, the standby capacity of the power supply 5 is determined with the rated capacity (for example, 2.5 kW) of the power supply 51 as the minimum unit. You may adjust the If the rated capacity of the power supply unit 51 is reduced, the standby capacity of the power supply 5 can be adjusted more finely.

  The data storage unit 76 is used to store information necessary for various processes performed in the power supply control device 7. For example, the data storage unit 76 stores data received from the external device 8 by the communication unit 71, the prediction result of the generated power prediction unit 72, the prediction result of the power consumption prediction unit 73, the prediction result of the standby capacity prediction unit 74, etc. You may The elements of the communication unit 71, the generated power prediction unit 72, the power consumption prediction unit 73, the standby capacity prediction unit 74, and the power supply control unit 75 can use the information via the data storage unit 76.

  FIG. 5 is a flowchart showing an example of processing executed by the power control device 7. The processing of this flowchart is periodically performed. For example, the flowchart of FIG. 5 may be executed at time t1 to t2, time t2 to t3, time t3 to t4, time t4 to t5, and time t5 to t6 described above with reference to FIG. Among the processes in each step, the contents described above are not repeated.

  In step S1, the generated power prediction unit 72 predicts the generated power of the power generation device 3 in the second period T2. In step S2, the power consumption prediction unit 73 predicts the power consumption of the power consumption device 6 in the second period T2. Note that the order of the processes in step S1 and step S2 may be reversed.

  In step S3, the standby capacity predicting unit 74 predicts the standby capacity of the power supply device 5 required in the second period T2. Specifically, the standby capacity prediction unit 74 calculates the power obtained by subtracting the generated power predicted in step S1 from the power consumption predicted in the previous step S2, and needs the calculated power in the second period T2 The standby capacity of the power supply 5 is predicted.

  In step S4, the power supply control unit 75 determines whether the standby capacity of the power supply 5 required in the second period T2 is similar to the current (that is, in the first period T1) standby capacity. If the required standby capacity and the current standby capacity are close to each other (step S4: YES), the processing of the flowchart ends. Thereby, the operation of the power supply device 5 at the current standby capacity is maintained. As a result, at the start of the subsequent second period T2, the power supply device 5 with the standby capacity predicted in the previous step S3 is operated. If the required standby capacity and the current standby capacity are not close to each other, that is, there is a difference between the two (step S4: NO), the process proceeds to step S5. When the standby capacity of the power supply 5 is adjusted by adjusting the number of the power supply units 51 operated in the hot standby and the number of the power supply units 51 operated in the cold standby as described above with reference to FIG. The determination in step S4 may be performed with the rated capacity (for example, 2.5 kW) of the power supply unit 51 as the minimum unit. That is, if the magnitude of the difference between the required standby capacity and the current standby capacity is less than the rated capacity of the power supply unit 51, it is determined that the two are similar. If the difference is equal to or greater than the rated capacity of the power supply unit 51, it is determined that the two are not approximate.

  In step S <b> 5, the power supply control unit 75 adjusts the standby capacity of the power supply 5. Specifically, at the start of the second period T2, the power supply device control unit 75 controls the power supply device 5 to operate at the standby capacity predicted in the previous step S3. After the process of step S5 is completed, the process of the flowchart ends.

  In the above, the example of control of the power supply device 5 by the power supply control device 7 in the power system 1 shown in FIG. 1 has been described. However, the configuration of the power system is not limited to this.

  FIG. 6 shows another example of the configuration of the power system. In power system 1A shown in FIG. 5, power conditioner 4 converts the generated power of power generation device 3 and outputs the converted power to the power path between power grid 2 and power supply device 5. A connection portion of the power conditioner 4, the power network 2, and the power supply device 5 in the power path is referred to as a node N2 and illustrated. The power output from the power conditioner 4 is AC power synchronized with AC power of the power network 2 (for example, the same frequency and phase of voltage). Reverse power flow of power can also be performed by transmitting power (generated power) generated by the power generation device 3 to the power grid 2 via, for example, a power meter (not shown). When power from power grid 2 can not be used due to a power failure or the like, AC power not synchronized with AC power of power grid 2 may be output from power conditioner 4 to node N2.

  In the case of the power system 1A, unlike the case of the power system 1, since the output power of the power supply device 5 does not change even if the generated power of the power generation device 3 fluctuates, the prediction of the generated power of the power generation device 3 is unnecessary. It can also be done. FIG. 7 is a flowchart showing an example of processing executed by the power supply control device 7 in such a case. The process of step S11 is the same as the process of step S2 of FIG. 4 described above. That is, the power consumption prediction unit 73 predicts the power consumption of the power consumption device 6 in the second period T2. In step S <b> 12, the standby capacity predicting unit 74 predicts the power consumption of the power consuming apparatus 6 predicted in the previous step S <b> 11 as the standby capacity of the power supply apparatus 5. The processes of steps S13 and S14 are the same as steps S4 and S5 of FIG. 4 described above. That is, in step S13, the power supply control unit 75 determines whether the standby capacity of the power supply 5 required in the second period T2 is the same as the current standby capacity. In step S <b> 14, the power supply control unit 75 adjusts the standby capacity of the power supply 5.

  As described above, the power supply control device 7 according to the embodiment controls the standby capacity of the power supply device 5. The power supply device 5 supplies power to the power consumption device 6 using at least one of the generated power of the power generation device 3 and the power from the power grid 2. The power supply control device 7 includes a standby capacity prediction unit 74 and a power supply control unit 75. The standby capacity prediction unit 74 sets the standby capacity of the power supply apparatus 5 necessary for the power supply from the power supply apparatus 5 to the power consuming apparatus 6 not to be insufficient in the second time period T2 after the first time period during the first time period T1. It predicts (steps S3 and S12). The power supply control unit 75 controls the power supply 5 so that the operation of the power supply 5 with the standby capacity predicted by the standby capacity prediction unit 74 is performed at the start of the second period T2 (steps S5 and S14).

  According to the power supply control device 7, the standby capacity of the power supply device 5 necessary for preventing the shortage of the power supply from the power supply device 5 to the power consuming device 6 in the second period T2 is predicted during the first period T1 Steps S3 and S12). Then, control is performed such that the operation of the power supply device 5 with the predicted standby capacity is performed at the start of the second period T2 (steps S5 and S14). Therefore, during the second period T2, it is possible to appropriately supply power from the power supply device 5 to the power consumption device 6, and to suppress consumption of standby power in the power supply device 5.

  In the power system 1 illustrated in FIG. 1, the generated power of the power generation device 3 is supplied to the power consumption device 6 without passing through the power supply device 5. In this case, from the predicted value of the maximum power consumed by the power consumption device 6 during the second period T2, the standby capacity prediction unit 74 calculates the predicted value of the minimum power generated by the power generation device 3 during the second period T2. The subtracted value may be predicted as the standby capacity of the power supply device 5 required in the second period T2 (steps S1 to S3). Thereby, the standby capacity of the power supply device 5 can be appropriately adjusted according to the fluctuation of the generated power of the power generation device 3 and the fluctuation of the power consumption of the power consumption device 6 (step S5). Such control is particularly performed when the power generation device 3 is a power generation device using natural energy such as a solar power generation device and the generated power fluctuates, and the power consumption device 6 further responds to traffic such as a communication device. It is useful when the power consumption fluctuates because it includes a wireless device whose power consumption fluctuates and an air conditioner whose power consumption fluctuates according to the temperature. For example, when stable power generation can be expected in the power generation device 3, consumption of standby power can be suppressed by reducing the standby capacity of the power supply device 5.

  In the power system 1A illustrated in FIG. 6, the generated power of the power generation device 3 is supplied to the power consumption device 6 via the power supply device 5. In this case, the standby capacity predicting unit 74 may predict the predicted value of the maximum power consumed by the power consuming device 6 during the second period T2 as the standby capacity of the power supply device 5 required in the second period T2 (see FIG. Steps S11 and S12). In this case, for example, as in step S2 (FIG. 5) described above, it is not necessary to consider the fluctuation of the generated power of the power generation apparatus 3 (because the generated power does not have to be predicted), The load of the prediction process by the power supply control device 7 can be reduced. In addition, since the output of the power conditioner 4 is supplied between the power network 2 and the power supply device 5 (node N2 in FIG. 6), the generated power of the power generation device 3 can be supplied (reversed) to the power network 2 .

  If there is a difference between the standby capacity of the power supply apparatus 5 during the first period T1 and the standby capacity predicted by the standby capacity predicting section 74 (steps S4 and S13: NO), the power supply apparatus control unit 75 The power supply device 5 is controlled such that the operation of the power supply device 5 with the standby capacity predicted by the standby capacity prediction unit 74 is performed at the start of the second period T2 (steps S5 and S14), and there is no difference (Steps S4 and S13: YES), the power supply device 5 may be controlled such that the operation of the power supply device 5 at the standby capacity of the power supply device 5 in the first period T1 is continued. Thus, the processing for adjusting the standby capacity of the power supply 5 may be performed only when the standby capacity of the power supply 5 has to be changed, so that the burden of control processing by the power control 7 may be reduced. You can also.

  As described with reference to FIG. 2, the power supply device 5 may include a plurality of power supply units 51. In this case, each of the power supply units 51 is either hot standby which increases the standby capacity of the power supply 5 but also increases standby power, or cold standby which decreases the standby capacity of the power supply 5 but decreases standby power. You may drive at The power supply control unit 75 may control the standby capacity of the power supply 5 by controlling the number of power supply units 51 operated in the hot standby and the number of power supply units 51 operated in the cold standby. Thus, the standby capacity of the power supply device 5 can be adjusted. In addition, by reducing the number of the power supply units 51 in the hot standby state, it is possible to operate the power supply units 51 in the hot standby state under high load to improve the efficiency.

  The block diagram used for the description of the said embodiment has shown the block of a functional unit. These functional blocks (components) are realized by any combination of hardware and / or software. Moreover, the implementation means of each functional block is not particularly limited. That is, each functional block may be realized by one physically and / or logically coupled device, or directly and / or indirectly two or more physically and / or logically separated devices. It may be connected by (for example, wired and / or wireless) and realized by the plurality of devices.

  FIG. 8 is a diagram showing an example of the hardware configuration of the power supply control device 7 according to the present embodiment. The above-described power control device 7 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007 and the like.

  Note that in the description of the present specification, the term "device" can be read as a circuit, a device, a unit, or the like. The hardware configuration of the power supply control device 7 may be configured to include one or more of the devices illustrated in the figure, or may be configured without including some devices.

  Each function in the power supply control device 7 causes the processor 1001 to perform an operation by reading predetermined software (program) on hardware such as the processor 1001, the memory 1002, etc., communication by the communication device 1004, memory 1002 and storage This is realized by controlling reading and / or writing of data in 1003.

  The processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be configured by a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like. For example, the generated power prediction unit 72, the power consumption prediction unit 73, the standby capacity prediction unit 74, the power supply control unit 75, and the like may be realized by the processor 1001.

  Also, the processor 1001 reads a program (program code), a software module or data from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processing according to these. As a program, a program that causes a computer to execute at least a part of the operations described in the above embodiments is used. For example, the generated power prediction unit 72 of the power supply control device 7 may be realized by a control program stored in the memory 1002 and operated by the processor 1001, or may be realized similarly for other functional blocks. The various processes described above have been described to be executed by one processor 1001, but may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The program may be transmitted from the network via a telecommunication line.

  The memory 1002 is a computer readable recording medium, and includes, for example, at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), and a RAM (Random Access Memory). It may be done. The memory 1002 may be called a register, a cache, a main memory (main storage device) or the like. The memory 1002 can store a program (program code), a software module, etc. that can be executed to perform the paging process according to an embodiment of the present invention.

  The storage 1003 is a computer readable recording medium, and for example, an optical disc such as a CD-ROM (Compact Disc ROM), a hard disc drive, a flexible disc, a magneto-optical disc (for example, a compact disc, a digital versatile disc, Blu-ray A (registered trademark) disk, a smart card, a flash memory (for example, a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, and the like may be used. The storage 1003 may be called an auxiliary storage device. The above-mentioned storage medium may be, for example, a database including the memory 1002 and / or the storage 1003, a server or any other suitable medium. For example, the data storage unit 76 may be realized by the storage 1003.

  The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, or the like. For example, the communication unit 71 may be realized by the communication device 1004.

  The input device 1005 is an input device that receives an input from the outside, and the output device 1006 is an output device that implements output to the outside. The input device 1005 and the output device 1006 may be realized by a touch panel display in which both are integrated.

  In addition, devices such as the processor 1001 and the memory 1002 are connected by a bus 1007 for communicating information. The bus 1007 may be configured by a single bus or may be configured by different buses among the devices.

  Further, the power control device 7 includes hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA). And part or all of each functional block may be realized by the hardware. For example, processor 1001 may be implemented in at least one of these hardware.

  As long as there is no contradiction, the processing procedure, sequence, flow chart, etc. of each aspect / embodiment described in this specification may be reversed. For example, for the methods described herein, elements of the various steps are presented in an exemplary order and are not limited to the particular order presented.

  The input / output information or the like may be stored in a specific place (for example, a memory) or may be managed by a management table. Information to be input or output may be overwritten, updated or added. The output information etc. may be deleted. The input information or the like may be transmitted to another device.

  The determination may be performed by a value (0 or 1) represented by one bit, may be performed by a true / false value (Boolean: true or false), or may be compared with a numerical value (for example, a predetermined value). Comparison with the value).

  Each aspect / embodiment described in this specification may be used alone, may be used in combination, and may be switched and used along with execution. In addition, notification of predetermined information (for example, notification of "it is X") is not limited to what is explicitly performed, but is performed by implicit (for example, not notifying of the predetermined information) It is also good.

  Software may be called software, firmware, middleware, microcode, hardware description language, or any other name, and may be instructions, instruction sets, codes, code segments, program codes, programs, subprograms, software modules. Should be interpreted broadly to mean applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc.

  Also, software, instructions, etc. may be sent and received via a transmission medium. For example, software may use a wireline technology such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and / or a website, server or other using wireless technology such as infrared, radio and microwave When transmitted from a remote source, these wired and / or wireless technologies are included within the definition of transmission medium.

  The information, signals, etc. described herein may be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips etc that may be mentioned throughout the above description may be voltage, current, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any of these May be represented by a combination of

  The terms described in the present specification and / or the terms necessary for the understanding of the present specification may be replaced with terms having the same or similar meanings.

  The names used for the parameters described above are in no way limiting.

  The term "determining" as used herein may encompass a wide variety of operations. "Judgment" may be, for example, calculating, computing, processing, deriving, investigating, looking up (eg in a table, database or other data structure) It may include searching (searching), confirmation (ascertaining) as “decision”, “determining”, and the like. Also, “determination” may be receiving (eg, receiving information), transmitting (eg, transmitting information), input (input), output (output), accessing (accessing) For example, it can be regarded as "determining" or "determining" that accessing data in the memory). Also, "determining" may include considering that "resolving", "selecting", "selecting", "selecting", "establishing", "comparing" and the like have been "determined" or "decided". That is, "determination" may include considering that some action is "determination" or "determination".

  As used herein, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

  As long as "includes", "including", and variations thereof are used in the present specification or claims, these terms as well as the term "comprising" Is intended to be comprehensive. Further, it is intended that the term "or" as used in the present specification or in the claims is not an exclusive OR.

  In the present specification, a plurality of devices are also included unless it is a device clearly having only one context or technically.

  Throughout this disclosure, unless the context clearly indicates otherwise, it is intended to include the plural.

  DESCRIPTION OF SYMBOLS 1, 1A ... Power system, 2 ... Power network, 3 ... Power generation device, 4 ... Power conditioner, 5 ... Power supply device, 6 ... Power consumption device, 7 ... Power control device, 74 ... Standby capacity prediction part, 75 ... Power device Control unit.

Claims (5)

What is claimed is: 1. A power supply control device that controls a power supply device that supplies power to a power consumption device using at least one of power generated by a power generation device and power from a power network,
A prediction unit that predicts a standby capacity of the power supply device necessary for preventing the power supply from the power supply device from being insufficient from the power supply device in the second period after the first period during the first period;
A control unit configured to control the power supply device such that operation of the power supply device with the standby capacity predicted by the prediction unit is performed at the start of the second period;
, A power control device. Power generated by the power generation device is supplied to the power consumption device without passing through the power supply device.
The prediction unit is a value obtained by subtracting the predicted value of the minimum power generated by the power generation device during the second period from the predicted value of the maximum power consumed by the power consumption device during the second period, Estimated as the standby capacity of the power supply device required in the second period,
The power supply control device according to claim 1. Power generated by the power generation device is supplied to the power consumption device via the power supply device;
The prediction unit predicts a predicted value of the maximum power consumed by the power consumption device during the second period as the standby capacity of the power supply device required in the second period.
The power supply control device according to claim 1. The control unit
If there is a difference between the standby capacity of the power supply device during the first period and the standby capacity predicted by the prediction unit, the standby predicted by the prediction unit at the start of the second period Controlling the power supply so that operation of the power supply with capacity is performed;
If there is no difference, the power supply device is controlled such that the operation of the power supply device with the standby capacity of the power supply device in the first period is continued.
The power supply control device according to any one of claims 1 to 3. The power supply operates either in a hot standby, each increasing the standby capacity of the power supply but also increasing the standby power, and a cold standby, which reduces the standby capacity of the power supply but reduces the standby power. Including multiple power supply units
The control unit controls the standby capacity of the power supply device by controlling the number of power supply units operating in the hot standby and the number of power supply units operating in the cold standby.
The power supply control device according to any one of claims 1 to 4.

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