JP5897518B2 - Voltage regulator - Google Patents

Description

  The present invention relates to a voltage regulator.

  For example, a voltage adjustment device that adjusts the voltage of a power line to which an electric power load and a solar power generation device are connected is known (for example, Patent Document 1).

JP 2012-114989 A

  The voltage adjustment device of Patent Literature 1 adjusts the voltage of the power line so that the voltage value of the power line becomes a voltage value within a predetermined range. The voltage adjustment device compares the actual voltage value of the power line with the upper limit value and the lower limit value in the predetermined range, and performs the adjustment when the voltage value of the power line deviates from the predetermined range. For this reason, for example, when the change speed of the voltage of the power line is relatively fast, there is a possibility that the voltage value of the power line deviates from the predetermined range relatively greatly.

The main present invention that solves the above-described problem is to adjust the voltage of a power line to which a power load provided in a plurality of areas and a solar power generation device that supplies power to the power load are connected. A voltage regulator, a storage device storing voltage information indicating a target voltage value of the power line with respect to a value of solar radiation, and the plurality of weighted power consumptions of the power load in each of the plurality of areas An arithmetic unit that calculates a weighted average value of the predicted amount of solar radiation in each of the areas as a solar radiation amount predicted value as the value of the solar radiation amount, a predicted solar radiation amount value as the value of the solar radiation amount, and stored in the storage device based on the above voltage information that is, as described above the voltage value of the power line becomes a value corresponding to the target voltage value corresponding to the solar radiation amount predicted value, the solar radiation amount prediction calculated by the arithmetic unit Based on a voltage regulator, characterized in that it and a regulating device that adjusts the voltage of the power line.

  Other features of the present invention will become apparent from the accompanying drawings and the description of this specification.

  According to the present invention, the voltage of the power line can be adjusted so that the voltage value of the power line becomes a value corresponding to the target voltage value corresponding to the predicted amount of solar radiation.

It is a figure which shows the power distribution system in embodiment of this invention. It is a figure which shows the mesh in embodiment of this invention. It is a block diagram which shows the hardware of the voltage regulator in embodiment of this invention. It is a block diagram which shows the voltage regulator in embodiment of this invention. It is a figure which shows the 1st set value table in embodiment of this invention. It is a figure which shows the 2nd set value table in embodiment of this invention. It is a figure which shows the load amount for every mesh and the predicted value of the solar radiation amount in embodiment of this invention. It is a figure which shows the plan reference information in embodiment of this invention. It is a flowchart which shows operation | movement of the voltage regulator in embodiment of this invention.

  At least the following matters will become apparent from the description of this specification and the accompanying drawings.

=== Distribution system ===
Hereinafter, the power distribution system in the present embodiment will be described with reference to FIG. FIG. 1 is a diagram showing a power distribution system in the present embodiment.

  The distribution system 100 is a power system for supplying power from the substation 200 to the loads R1 to R4. The distribution system 100 includes a substation 200, a distribution line L1 (power line), a measuring device M1, a capacitor device 3, a reactor device 4, consumers 11 to 14, a weather information device 5 (observation device), and a voltage adjustment device 6. In addition, although the customer is provided with two or more in the power distribution system 100, suppose that four, for example, are provided for convenience of explanation.

  The substation 200 is, for example, a distribution substation that steps down the power supplied from the upstream side and supplies the stepped down power to the distribution line L1. The substation 200 has a distribution transformer 201.

  The distribution transformer 201 is a device that transforms, for example, a voltage on the primary side and outputs the transformed voltage from the secondary side. The transformation ratio of the distribution transformer 201 is adjusted stepwise by switching the tap according to the first control signal S2. That is, the voltage level on the secondary side of the distribution transformer 201 is adjusted based on the first control signal S2. The secondary side of the distribution transformer 201 is connected to one end of the distribution line L1. The primary side of distribution transformer 201 is connected to one end of transmission line L200. The power transmission line L200 is a power transmission line for supplying a voltage of 66 kilovolts from an upstream primary substation (not shown) to the downstream substation 200, for example.

The distribution line L1 is a power line for supplying power from the substation 200 to the consumers 11 to 14, and extends from the upstream substation 200 toward the downstream side. L10 is connected. Details of the consumers 11 to 14 will be described later.

  The measuring device M1 measures the voltage of the distribution line L1 and outputs a measurement signal S1 indicating the measurement result. The measuring device M1 is provided in the vicinity of the sending end of the distribution line L1 in the substation 200, for example.

  The capacitor device 3 is a device for adjusting the voltage of the distribution line L1. The capacitor device 3 includes a power capacitor (not shown) that is turned on or off according to the second control signal S3.

  The reactor device 4 is a device for adjusting the voltage of the distribution line L1. The reactor device 4 has a shunt reactor that is turned on or off in response to the third control signal S4.

  The weather information device 5 is a device that is provided in, for example, the Japan Meteorological Agency or the Japan Meteorological Association and outputs a weather signal S5 indicating GPV (Grid Point Value) data. Note that the GPV data includes, for example, data indicating the amount of solar radiation in each of the meshes N1 to N4. The GPV data includes actual values of past solar radiation amounts and predicted values of future solar radiation amounts. The actual value and the predicted value of the solar radiation amount may be calculated by the weather information device 5 based on, for example, the cloud amount, the air amount, the wind direction, and the like. The GPV data may be data based on the weather observation results of the meshes N1 to N4 including the positions where the generators G1 to G4 are provided by the weather information device 5. Details of the meshes N1 to N4 will be described later.

  The voltage regulator 6 is a device that controls the power distribution system 100. The voltage regulator 6 receives the measurement signal S1 and the weather signal S5, and based on the information indicated in these signals, the first control signal S2, the second control signal S3, the third control signal S4 (“each Control signal ").

=== Mesh ===
Hereinafter, the mesh in the present embodiment will be described with reference to FIG. FIG. 2 is a diagram showing a mesh in the present embodiment.

  The meshes N1 to N4 are areas formed by dividing a predetermined area N100 such as the Chugoku region in the Japanese archipelago and the periphery of the predetermined area N100 based on a predetermined rule. The meshes N1 to N4 are areas corresponding to the GPV data indicated by the weather signal S5 output from the weather information device 5, for example. Each of the meshes N1 to N4 is, for example, a substantially rectangular area of 5 kilometers square. Each of the meshes N1 to N4 may be a substantially rectangular area of 20 kilometers square, for example. For convenience of explanation, it is assumed that the consumers 11 to 14 are provided in the meshes N1 to N4, respectively.

=== Customer ===
Hereinafter, with reference to FIG. 1, the consumer in this embodiment is demonstrated.

  The consumer 11 is provided in the mesh N1. The customer 11 has a pole transformer Tr1, a load R1, and a generator G1.

  The primary side of pole transformer Tr1 is connected to distribution line L1. The secondary side of pole transformer Tr1 is connected to generator G1 and load R1.

  The load R1 is a power load connected to the distribution line L1 via the pole transformer Tr1.

  The generator G1 is a distributed power source such as a solar power generation device. The generator G1 generates a power generation amount corresponding to the amount of solar radiation at a position where the generator G1 is provided. The generated power generated by the generator G1 is supplied to the load R1 or supplied to the distribution line L1 according to the power consumption of the load R1.

  Consumers 12, 13, and 14 are provided in meshes N2, N3, and N4, respectively. The configurations of the consumers 12 to 14 are the same as the configuration of the customer 11, respectively. That is, the configuration of the pole transformers Tr2, Tr3, Tr4 is the same as the configuration of the pole transformer Tr1, the configuration of the generators G2, G3, G4 is the same as the configuration of the generator G1, and the load R2 , R3, and R4 are similar in configuration to the load R1.

=== Voltage regulator ===
Hereinafter, with reference to FIG. 3 and FIG. 4, the voltage regulator in the present embodiment will be described. FIG. 3 is a block diagram illustrating hardware of the voltage regulator according to the present embodiment. FIG. 4 is a block diagram showing the voltage regulator in the present embodiment.

  The voltage adjusting device 6 is a device for adjusting the voltage of the distribution line L1. The voltage adjusting device 6 includes a CPU (Central Processing Unit) 61, a communication device 62, a storage device 63, a display device 64, and an input device 65. The CPU 61 implements various functions of the voltage regulator 6 by executing a program stored in the storage device 63, and performs overall control of the voltage regulator 6. The storage device 63 stores the above-described program and various types of information. The various information includes GPV data indicated by the weather signal S5 and information indicating the voltage value of the distribution line L1 indicated by the measurement signal S1. The display device 64 is a display that displays information of the voltage adjustment device 6. The input device 65 is, for example, a keyboard or a mouse for inputting information to the voltage adjusting device 6. The communication device 62 communicates with the measurement device M1, the weather information device 5, and a tap switching device (not shown) via the network 600. The communication device 62 receives the measurement signal S1 every predetermined time. The tap switching device is a device that switches the tap of the distribution transformer 201 in the substation 200 based on the first control signal S2.

  The voltage regulator 6 further includes a first creation unit 66, a computation unit 67 (calculation device), a second creation unit 68, and a control unit 69 (also referred to as “various functions of the voltage regulation device 6”). The various functions of the voltage adjustment device 6 are realized by the CPU 61 executing programs stored in the storage device 63. The second creation unit 68 and the control unit 69 correspond to an adjustment device.

  The first creation unit 66 creates a first set value table T1 (FIG. 5) and a second set value table T2 (FIG. 6) for the reference voltage based on various information stored in the storage device 63. The first creating unit 66 further stores table information (voltage information) indicating the created first set value table T1 and second set value table T2 in the storage device 63. The calculating part 67 calculates a solar radiation amount predicted value. The second creation unit 68 creates the plan reference information T3 (FIG. 8) indicating the value of the plan reference voltage based on the table information stored in the storage device 63 and the calculation result of the calculation unit 67. The control unit 69 outputs each control signal based on the creation result of the second creation unit 68 and the measurement result of the measuring device M1.

=== First Creation Unit ===
Hereinafter, the first creation unit in the present embodiment will be described with reference to FIGS. FIG. 5 is a diagram showing a first set value table in the present embodiment. FIG. 6 is a diagram showing a second set value table in the present embodiment. 5 and 6 show the relationship between the solar radiation amount at 12:00 and 13:00 in one day and the reference voltage. Regarding the relationship between the solar radiation amount at times other than 12:00 and 13:00 and the reference voltage, It is omitted for convenience of explanation.

  The first creation unit 66 creates a first set value table T1 and a second set value table T2 based on various types of information stored in the storage device 63. The first creation unit 66 creates a set value table for each season. The first set value table T1 shows a set value table for summer and winter, and the second set value table T2 shows a set value table for spring and autumn. In addition, the 1st preparation part 66 is good also as producing the setting value table which changes for every season, and it is good also as the 1st preparation part 66 producing the same setting value table in all the seasons.

<First settling value table>
In the first set value table T1, the value of the amount of solar radiation at each time of the day is associated with the value of the reference voltage. In the first set value table T1, for example, when the solar radiation value at 12:00 is 0 (kW) or more and less than 0.2 (kW), the reference voltage value to be set may be 112 (V). It is shown. Further, in the first set value table T1, for example, when the value of the solar radiation amount at 12:00 is 0.2 (kW) or more and less than 0.4 (kW), 0.4 (kW) or more and 0.6 (kW) In the case of less than 0.6 (kW) or more and less than 0.8 (kW), in the case of 0.8 (kW) or more, the reference voltage value to be set is 111 (V) or 110 (V ), 108 (V), 106 (V). Further, in the first set value table T1, for example, the value of the reference voltage to be set is shown for each value of the solar radiation amount at 13:00.

<Reference voltage>
The value of the reference voltage in the first set value table T1 and the second set value table T2 is a voltage value corresponding to a target value (also referred to as “target voltage value”) of the voltage of the distribution line L1. The target voltage value is the voltage of the distribution line L1 for supplying the load R1 to R4 with an appropriate voltage having a voltage value within a predetermined range of, for example, 95V to 107V as a voltage for properly operating the loads R1 to R4. Value. The target voltage value may be determined based on, for example, tap sections of pole transformers Tr1 to Tr4, specifications of loads R1 to R4, and the like. The value of the reference voltage is a value determined by converting the target voltage value of the distribution line L1 based on the PT ratio as a transformation ratio of a measurement transformer (not shown) provided in the measuring device M1. That is, the first set value table T1 and the second set value table T2 indicate the target voltage value of the distribution line L1 with respect to the value of the solar radiation amount. For example, when the PT ratio of the measuring device M1 is 6600 (V) vs. 110 (V), the reference voltage values corresponding to 6540 (V) and 6720 (V) as the target voltage values of the distribution line L1, respectively. Becomes 109 (V) and 112 (V).

  Note that the measuring device M1 is provided with the above-described measuring transformer, a voltmeter (not shown), and an arithmetic device (not shown). The measuring transformer steps down the voltage of the distribution line L1 according to the PT ratio. The voltmeter measures the voltage after being stepped down by the measuring transformer. The arithmetic device converts the voltage value as the measurement result of the voltmeter into a voltage value corresponding to the voltage before being stepped down by the measuring transformer based on the PT ratio. The measurement signal S1 output from the measurement device M1 includes, for example, information indicating the value of a voltage measured by a voltmeter (also referred to as “voltage after being stepped down by a measurement transformer”), and a measurement transformer. Information indicating the voltage value converted by the arithmetic unit is included as the voltage value before being stepped down.

<Second settling value table>
In the second set value table T2, the value of the amount of solar radiation at each time of the day is associated with the value of the reference voltage. Since the configuration of the second set value table T2 is the same as the configuration of the first set value table T1, the description thereof is omitted.

<First and second set value tables>
Regarding the value of the reference voltage with respect to the value of each solar radiation amount at the same time (for example, 12:00), the first set value table T1 is higher than the second set value table T2. That is, for example, the target voltage value in summer and winter when the power consumption of the loads R1 to R4 based on the operation of the air conditioning equipment is relatively large is the target voltage value in spring and autumn when the power consumption of the loads R1 to R4 is relatively small. It is shown that it is higher than the value. Therefore, it is possible to control the distribution system 100 according to the voltage drop width based on the power consumption of the loads R1 to R4.

<Example of setting value table creation>
The first creation unit 66 creates the first set value table T1 and the second set value table T2 based on a predetermined simulation using the relationship between the past solar radiation amount and the past voltage value of the distribution line L1. create. Specifically, for example, the first creation unit 66, when the actual value of the solar radiation amount is approximately 0 (kW) and the actual value of the solar radiation amount is the maximum value when the actual value of the solar radiation amount is approximately 0 (kW) in a predetermined season. The difference value with the voltage value of the distribution line L1 is calculated. The first preparation unit 66 regards this difference value as a fluctuation range in which the voltage value of the distribution line L1 varies according to the generated power of the generators G1 to G4, and the voltage value of the distribution line L1 is, for example, 95 V or more and 107 V The first set value table T1 and the second set value table T2 are created so that the voltage values are within the following predetermined range.

  For example, the first creation unit 66 determines that the voltage value of the distribution line L1 is the value of the pole transformers Tr1 to Tr4 based on the correlation between the past voltage value of the distribution line L1 and the past actual amount of solar radiation. The first set value table T1 and the second set value table T2 may be created so that the voltage value is within a predetermined range determined according to the tap section.

=== Calculation unit ===
Hereinafter, the calculation unit in the present embodiment will be described with reference to FIG. FIG. 7 is a diagram illustrating a load amount and a predicted value of the solar radiation amount for each mesh in the present embodiment.

The calculation unit 67 predicts the solar radiation amount of the entire power distribution system 100 based on the weighted average of the predicted values C11 to C14 of the solar radiation amounts of the meshes N1 to N4 with the load amounts W11 to W14 of the meshes N1 to N4 as weights. Calculate a predicted value of solar radiation as a value. Specifically, the computing unit 67 calculates a solar radiation amount predicted value based on Equation 1.

  W11 to W14 indicate load amounts of the meshes N1 to N4 (FIG. 7), respectively, and C11 to C14 indicate predicted values of solar radiation amounts of the meshes N1 to N4 in the GPV data (FIG. 7), respectively.

  The load amount W11 indicates an amount corresponding to the power consumption amount of the load R1 provided in the mesh N1. For example, the load amount W11 is determined in advance according to a contract power amount determined based on an electric contract between the customer 11 and an electric power company that sells electric power to the customer 11. Also good. For example, the load amount W11 may be determined in advance according to the capacity of the pole transformer Tr1. For example, the load amount W11 may be calculated by the calculation unit 67 based on a measurement result of a smart meter or the like that measures the power consumption of the load R1 every predetermined time. Note that the configurations of the load amounts W12 to W14 are the same as the configuration of the load amount W11, and thus the description thereof is omitted.

=== Second Creation Unit ===
Hereinafter, the second creation unit in the present embodiment will be described with reference to FIG. FIG. 8 is a diagram showing the plan reference information in the present embodiment. In FIG. 8, reference voltage values at 12:00 and 13:00 on the planned date as a future day are shown, and the reference voltage values at times other than 12:00 and 13:00 are shown for convenience of explanation. , Has been omitted.

  The second creation unit 68 is based on the first set value table T1 and the second set value table T2 indicated in the table information stored in the storage device 63, and the solar radiation amount predicted value calculated by the calculation unit 67. The plan standard information T3 is created. The plan reference information T3 is information indicating a plan value of a reference voltage to be set for each hour on a future plan date.

  The second creating unit 68 creates the plan reference information T3 based on the set value table corresponding to the season of the planned date and the predicted amount of solar radiation on the planned date. For example, if the planned date is summer and the predicted solar radiation amounts at 12:00 and 13:00 on the planned date are respectively calculated as 0.3 (kW) and 0.7 (kW), the second creating unit 68 , Refer to the first settling value table T1. Furthermore, 0.3 (kW), which is a predicted amount of solar radiation as a value of solar radiation at 12:00, corresponds to 0.2 (kW) or more and less than 0.4 (kW) in the first settling value table T1. Therefore, the second preparation unit 68 sets the value of the planned reference voltage to be set at 12:00 on the planned date to 111 (V). Moreover, 0.7 (kW) which is an estimated amount of solar radiation as a value of the amount of solar radiation at 13:00 corresponds to 0.6 (kW) or more and less than 0.8 (kW) in the first set value table T1. Therefore, the second preparation unit 68 sets the value of the planned reference voltage to be set at 13:00 on the planned date to 109 (V). Similarly, the second creation unit 68 determines the value of the plan reference voltage to be set for each hour on the plan date, and creates the plan reference information T3. Thereafter, the second creating unit 68 further stores the plan reference information T3 in the storage device 63.

=== Control unit ===
Hereinafter, the control unit in the present embodiment will be described with reference to FIG.

  The control unit 69 outputs each control signal based on the plan reference information T3 stored in the storage device 63 and the voltage value of the distribution line L1 indicated in the measurement signal S1. The control unit 69 controls the distribution system 100 on the planned date with the value of the planned reference voltage indicated in the planned reference information T3 as the value of the reference voltage at each time on the planned date.

  The control unit 69 compares the value of the plan reference voltage indicated in the plan reference information T3 with the voltage value of the distribution line L1 indicated in the measurement signal S1, and outputs each control signal. The control unit 69 controls the distribution system 100 so that the value of the voltage after being stepped down by the measurement transformer in the measurement device M1 becomes the value of the planned reference voltage. That is, the control unit 69 controls the distribution system 100 so that the voltage value of the distribution line L10 becomes a target voltage value corresponding to the value of the planned reference voltage.

  For example, when the value of the voltage after being stepped down by the measurement transformer in the measuring device M1 is larger than the value of the planned reference voltage, the control unit 69 outputs each control signal for reducing the voltage of the distribution line L1. Output. In this case, the tap of the distribution transformer 201 is switched so that the voltage level on the secondary side of the distribution transformer 201 decreases. Further, the power capacitor of the capacitor device 3 is cut off. Furthermore, the shunt reactor of the reactor device 4 is turned on.

  On the other hand, for example, when the value of the voltage after being stepped down by the measuring transformer in the measuring apparatus M1 is smaller than the value of the planned reference voltage, the control unit 69 controls each control for increasing the voltage of the distribution line L1. Output a signal. In this case, the distribution transformer 201 is tapped so that the voltage level on the secondary side of the distribution transformer 201 increases. Furthermore, the power capacitor of the capacitor device 3 is turned on. Furthermore, the shunt reactor of the reactor device 4 is blocked.

=== Operation of Voltage Regulator ===
Hereinafter, the operation of the voltage regulator in the present embodiment will be described with reference to FIG. FIG. 9 is a flowchart showing the operation of the voltage regulator in this embodiment.

  A description will be given from the start of execution of the program stored in the storage device 63 and the CPU 61 starting the overall control of the voltage regulator 6.

  The voltage adjustment device 6 creates a first set value table T1 (FIG. 5) and a second set value table T2 (FIG. 6) based on various information stored in the storage device 63, and stores the table information in the storage device. 63 (step St11). The voltage adjustment device 6 calculates the predicted amount of solar radiation based on Equation 1 and the like (Step St12). The voltage adjusting device 6 creates the plan reference information T3 based on the first set value table T1, the second set value table T2, and the solar radiation amount predicted value, and stores it in the storage device 63 (step St13). Based on the information indicated by the plan reference information T3 and the measurement signal S1, the voltage adjustment device 6 is configured so that the voltage value after being stepped down by the measurement transformer in the measurement device M1 becomes the value of the plan reference voltage. The power distribution system 100 is controlled (step St14). Thereafter, the voltage adjusting device 6 ends the operation.

  As described above, the voltage adjustment device 6 includes the storage device 63, the second creation unit 68, and the control unit 69. The voltage adjusting device 6 is a device for adjusting the voltage of the distribution line L1. The distribution line L1 is connected to loads R1 to R4 as power loads and generators G1 to G4 as solar power generation devices that supply power to the loads R1 to R4. The storage device 63 stores table information indicating the first set value table T1 and the second set value table T2. 1st set value table T1 and 2nd set value table T2 have shown the target voltage value of the distribution line L1 with respect to the value of solar radiation amount. The second creating unit 68 creates the plan reference information T3 indicating the value of the plan reference voltage based on the predicted amount of solar radiation as the value of the amount of solar radiation and the table information. Based on the plan reference information T3, the control unit 69 adjusts the voltage of the distribution line L1 so that the voltage value of the distribution line L1 becomes a value corresponding to the target voltage value corresponding to the predicted amount of solar radiation. That is, the control unit 69 sets the target voltage value in which the voltage value of the distribution line L1 corresponds to the predicted amount of solar radiation based on the predicted amount of solar radiation as the value of the amount of solar radiation and the table information stored in the storage device 63. The voltage of the distribution line L1 is adjusted so as to be a value according to. With these configurations, the voltage of the distribution line L1 can be adjusted so that the voltage value of the distribution line L1 becomes a value corresponding to the target voltage value corresponding to the predicted amount of solar radiation. Therefore, the voltage of the distribution line L1 can be adjusted so that an appropriate voltage having a voltage value of, for example, 95 V or more and 107 V or less is supplied to the loads R1 to R4. Further, the predicted amount of solar radiation is reflected on the adjustment of the voltage of the distribution line L1. Therefore, for example, the voltage of the distribution line L1 can be adjusted in consideration of fluctuations in the generated power of the generators G1 to G4 based on weather fluctuations. Moreover, the voltage of the distribution line L1 will be adjusted based on the plan in which the predicted amount of solar radiation was reflected. Therefore, for example, even when the fluctuation rate of the power generation amount of the generators G1 to G4 is relatively fast, the voltage value of the distribution line L1 is reliably set to the target voltage value by adjusting the voltage of the distribution line L1 based on the plan. It can be set to a value according to.

  Moreover, the calculating part 67 calculates a solar radiation amount predicted value. The second creation unit 68 creates the plan reference information T3 based on the predicted amount of solar radiation calculated by the calculation unit 67. The control unit 69 adjusts the voltage of the distribution line L1 based on the plan reference information T3. That is, the control unit 69 adjusts the voltage of the distribution line L1 based on the predicted amount of solar radiation calculated by the calculation unit 67. Therefore, by improving the calculation accuracy of the predicted amount of solar radiation by the calculation unit 67, the voltage value of the distribution line L1 can be reliably set to a value corresponding to the target voltage value.

  Further, the calculation unit 67 calculates a weighted average value of the predicted values C11 to C14 of the solar radiation amounts of the meshes N1 to N4 with the load amounts W11 to W14 of the meshes N1 to N4 as weights, as the solar radiation amount predicted value. Therefore, the influence degree with respect to the solar radiation amount predicted value of the solar radiation amount predicted value of each mesh is determined according to each load amount. For example, the degree of influence of a mesh having a relatively large load amount is larger than the degree of influence of a mesh having a relatively small load amount. That is, with respect to the adjustment of the voltage value of the distribution line L1, the load amount can be reflected together with the predicted value of the solar radiation amount of each mesh. Therefore, the voltage of the distribution line L1 can be reliably adjusted so that an appropriate voltage having a voltage value of, for example, 95 V or more and 107 V or less is supplied to the loads R1 to R4.

  The table information is information indicating the first set value table T1 and the second set value table T2. 1st set value table T1 and 2nd set value table T2 have shown the target voltage value for every said time slot | zone with respect to the value of the solar radiation amount for every time slot | zone which divided | segmented 1 day into every predetermined time (for example, 1 hour). . Therefore, for example, the voltage of the distribution line L1 can be adjusted in consideration of the power consumption of the loads R1 to R4, which vary from time to time, and the power generation of the generators G1 to G4.

  The table information is information determined for each season. Therefore, for example, the voltage of the distribution line L1 can be adjusted in consideration of the power consumption of the loads R1 to R4 that vary from season to season.

  The table information is information determined so that the reference voltage value in summer and winter (FIG. 5) is higher than the reference voltage value in spring and autumn (FIG. 6). That is, the table information is information determined so that the target voltage value in summer and winter is higher than the target voltage value in spring and autumn. Therefore, the target voltage value in summer and winter in which the power consumption of the loads R1 to R4 is relatively large based on the improvement in the operation rate of the air conditioning equipment is higher than the target voltage value in spring and autumn in which the power consumption is relatively small. Also gets higher. Therefore, the voltage of the distribution line L1 can be reliably adjusted so that an appropriate voltage having a voltage value of, for example, 95 V or more and 107 V or less is supplied to the loads R1 to R4.

  Moreover, the calculating part 67 calculates a solar radiation amount predicted value based on the observation result of the weather information apparatus 5 which observes the weather of the position where the generators G1 to G4 are provided. With this configuration, for example, it is not necessary to provide a solar radiation meter for measuring the solar radiation amount of the meshes N1 to N4, so that the cost for adjusting the voltage of the distribution line L1 can be reduced.

  In addition, the said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes equivalents thereof.

  In the embodiment described above, the first creation unit 66 creates the first set value table T1 and the second set value table T2. However, the present invention is not limited to this. For example, the first set value table T1 and the second set value table T2 may be created by a device other than the voltage adjustment device 6, and table information indicating these tables may be stored in the storage device 63. . Further, for example, the first set value table T1 and the second set value table T2 are created based on the manual calculation of the administrator of the power distribution system 100, and the information is input to the input device 65 of the administrator. Table information indicating the table may be stored in the storage device 63.

  Further, in the above embodiment, the solar radiation amount predicted value is calculated based on the weighted average of the solar radiation amount predicted values C11 to C14 of the meshes N1 to N4 with the load amounts W11 to W14 of the meshes N1 to N4 as weights. However, the present invention is not limited to this. For example, based on the weighted average of the predicted values C11 to C14 of the solar radiation amounts of the meshes N1 to N4, each weighted with a value indicating the power generation capacity such as the power generation capacity or power generation efficiency of the generators G1 to G4 of the meshes N1 to N4. And the calculating part 67 is good also as calculating a solar radiation amount estimated value. In this case, the prediction accuracy of the predicted amount of solar radiation can be improved.

5 Meteorological information device 6 Voltage adjustment device 63 Storage device 67 Calculation unit 68 Second creation unit 69 Control unit G1, G2, G3, G4 Generator L1 Distribution line R1, R2, R3, R4 Load

Claims (5)

A power load provided in multiple areas ;
A photovoltaic power generation device that supplies power to the power load, and a voltage adjustment device that adjusts the voltage of a power line to which the photovoltaic power generation device is connected,
A storage device storing voltage information indicating a target voltage value of the power line with respect to a value of solar radiation;
A computing device that calculates a weighted average value of predicted values of the amount of solar radiation in each of the plurality of regions weighted by the power consumption of the power load in each of the plurality of regions as a predicted amount of solar radiation as the value of the amount of solar radiation. When,
Based on the said voltage information stored in the storage device and the solar radiation amount predicted value of the value of the solar radiation, the voltage value of said power line corresponding to the target voltage value corresponding to the solar radiation amount predicted value An adjustment device that adjusts the voltage of the power line based on the predicted amount of solar radiation calculated by the arithmetic device so as to be a value ;
A voltage regulating device comprising: 2. The voltage according to claim 1, wherein the voltage information is information indicating the target voltage value for each time period with respect to the value of the solar radiation amount for each time period obtained by dividing one day into predetermined time periods. Adjustment device. The voltage regulator according to claim 1, wherein the voltage information is information determined for each season. The voltage adjustment device according to claim 3 , wherein the voltage information is information determined so that the target voltage value in summer and winter is higher than the target voltage value in spring and autumn. The voltage according to claim 1 , wherein the arithmetic device calculates the predicted amount of solar radiation based on an observation result of an observation device that observes weather at a position where the solar power generation device is provided. Adjustment device.

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