JP2015042130A - Voltage adjustment device, and voltage adjustment method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to adjust voltage of a power line so that a voltage value of the power line is within a predetermined range.SOLUTION: A voltage adjustment device for adjusting voltage of a power line to which a power load and a dispersion type power supply for supplying power to the power load are connected comprises: a first calculation unit for calculating correlation data showing correlation among an actual power generation amount of the dispersion type power supply at first time, an actual power generation amount of the dispersion type power supply at second time after the first time, and a weather result at third time corresponding to the second time; a second calculation unit for calculating a prediction power generation amount of the dispersion type power supply at fifth time after fourth time which is after the second time, on the basis of an actual power generation amount of the dispersion type power supply at the fourth time, weather prediction at sixth time whose relation with the fifth time is similar to relation between the second time and the third time, and the correlation data calculated by the first calculation unit; and an adjustment unit for adjusting the voltage of the power line so that the voltage value of the power line at the fifth time is within a predetermined range, on the basis of a result of the calculation by the second calculation unit.

Description

  The present invention relates to a voltage adjustment device and a voltage adjustment method.

  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 Document 1 adjusts the voltage of the power line based on the actual voltage value of the power line and the measurement result of the solar radiation meter so that the voltage value of the power line falls within a predetermined range. For example, if an error occurs in the measurement result of solar radiation by the solar radiation meter based on the failure of the solar radiation meter, the power line voltage adjustment accuracy is reduced and the power line voltage value falls within a predetermined range. It may be difficult to adjust the voltage.

  The main present invention that solves the above-described problem is a voltage adjustment device that adjusts the voltage of a power line to which a power load and a distributed power source that supplies power to the power load are connected. Correlation between the actual power generation amount of the distributed power source in time, the actual power generation amount of the distributed power source in the second time after the first time, and the weather actual result in the third time according to the second time The same as the relationship between the first arithmetic unit for calculating the correlation data indicating the actual power generation amount of the distributed power source in the fourth time after the second time, and the second time and the third time Based on the weather forecast at the sixth time having a relationship with the fifth time after the fourth time and the correlation data calculated by the first arithmetic unit, the fifth time Prediction of the distributed power source A second arithmetic unit that calculates the amount of electricity; and an adjustment unit that adjusts the voltage of the power line so that a voltage value of the power line in the fifth time is within a predetermined range based on a calculation result of the second arithmetic unit. And a voltage adjusting device.

  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 is within a predetermined range.

It is a figure which shows the power distribution system in 1st Embodiment of this invention. It is a figure which shows the satellite image in 1st Embodiment of this invention. It is a block diagram which shows the hardware of the control apparatus in 1st and 2nd embodiment of this invention. It is a block diagram which shows the control apparatus in 1st and 2nd embodiment of this invention. It is a figure which shows the image of the relationship between the air temperature and 2nd electric power in 1st Embodiment of this invention. It is a figure which shows the image of the relationship between the cloud cover and 1st electric power in 1st Embodiment of this invention. It is a figure which shows the 1st voltage distribution information in 1st Embodiment of this invention. It is a figure which shows the 2nd voltage distribution information in 1st Embodiment of this invention. It is a figure which shows the 2nd voltage distribution information after the voltage value of the distribution line in 1st Embodiment of this invention was changed. It is a flowchart which shows operation | movement of the control apparatus in 1st Embodiment of this invention. It is a figure which shows the power distribution system in 2nd Embodiment of this invention.

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

[First embodiment]
=== 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, distribution lines L1 and L2 (power lines), consumers 11 to 14, a weather information device 5, a control device 6 (voltage adjustment device), and a weather satellite 9. The weather information device 5 and the weather satellite 9 correspond to an observation device. Although a plurality of distribution lines are provided in the distribution system 100, for the sake of convenience of explanation, for example, two distribution lines are provided. A plurality of customers are provided in the power distribution system 100, but for convenience of explanation, for example, four customers are provided.

  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 lines L1 and L2. The substation 200 includes a distribution transformer 201, a transmission voltage adjusting device 202, and a measuring device M8.

  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 in stages by switching the taps according to the control signal S6. The secondary side of the distribution transformer 201 is connected to one end of the distribution lines L1 and L2. The primary side of distribution transformer 201 is connected to one end of transmission line L200. The transmission line L200 is a power line for supplying, for example, a 66 kilovolt voltage from an upstream primary substation (not shown) to the downstream substation 200. The sending voltage adjusting device 202 is a device for adjusting the voltage value of the sending end P10 of the distribution line L1 and the voltage value of the sending end P20 of the distribution line L2 based on the control signal S7. That is, the voltages at the sending ends P10 and P20 are adjusted based on the control signals S6 and S7.

  The measuring device M8 measures the temperature at the position where the measuring device M8 is provided, and outputs a measurement signal S8 indicating the measurement result.

The distribution line L1 is a power line for supplying power from the substation 200 to the consumers 11 and 12, and extends from the upstream substation 200 toward the downstream side. The distribution line L2 is a power line for supplying power from the substation 200 to the consumers 13 and 14, and extends from the upstream substation 200 toward the downstream side. The consumers 11 and 12 are connected to the distribution line L1. The consumers 13 and 14 are connected to the distribution line L2.

  The meteorological satellite 9 observes the amount of clouds in a predetermined area where the power distribution system 100 is provided, and outputs an image signal S9 indicating image information representing the satellite image 105 (FIG. 2) indicating the observation result. The image signal S9 is transmitted to the control device 6 via the weather information device 5. For example, the image signal S <b> 9 may be transmitted to the control device 6 without passing through the example weather information device 5.

  The meteorological information device 5 is provided, for example, in the Japan Meteorological Agency or the Meteorological Association, and observes weather such as wind speed and direction in each mesh and outputs a weather signal S5 indicating the observation result. The weather signal S5 indicates the actual value and the predicted value of the wind speed and the wind direction in each mesh. Note that, for example, the predicted values of the wind speed and the wind direction may be calculated by the weather information device 5 based on the actual values of the wind speed and the wind direction.

  The control device 6 is a device for controlling the distribution system 100 and adjusting the voltages of the distribution lines L1 and L2.

=== Satellite image, mesh ===
Hereinafter, satellite images and meshes in the present embodiment will be described with reference to FIG. FIG. 2 is a diagram showing a satellite image in the present embodiment.

  The satellite image 105 is an image based on the image information indicated in the image signal S9. The satellite image 105 is an image showing a cloud area in a predetermined area such as the Chugoku region in the Japanese archipelago and in the vicinity of the predetermined area. In the satellite image 105, a contour line N100 indicating the contour of a predetermined area is shown. In the satellite image 105, a plurality of vertical lines and horizontal lines for dividing the satellite image 105 into a plurality of areas are shown. The satellite image 105 is partitioned into a plurality of meshes including meshes N1 to N11 by a plurality of vertical lines and a plurality of horizontal lines. Each mesh corresponds to each area formed by dividing the above-described predetermined area and the periphery of the predetermined area based on a predetermined rule. Each mesh corresponds to, for example, a substantially rectangular area of 1 km square. Each mesh may correspond to, for example, a substantially rectangular area of 4 kilometers square. It should be noted that the positions where the consumers 11 to 14 are provided correspond to the meshes N1 to N4 for convenience of explanation. The position where the consumers 11 to 14 are provided and the mesh shown in the satellite image 105 are associated by the control device 6 based on the position information of each of the measuring devices M1 to M4. And

  In the satellite image 105, the cloud amount in a predetermined area is shown as, for example, brightness in the color of each mesh. That is, the lightness of each mesh in the satellite image 105 indicates the cloud amount of the area corresponding to the mesh in the predetermined area. Note that the satellite image 105 in FIG. 2 is drawn so that the lightness of the mesh decreases as the cloud amount increases for the convenience of explanation. In the satellite image 105, for example, the cloud amount of the area corresponding to the meshes N7 to N10 is larger than the cloud amount of the area corresponding to the meshes N3 to N6, and the cloud amount of the area corresponding to the meshes N3 to N6 is the meshes N1 and N2. It is shown that the amount of cloud in the area corresponding to the meshes N1 and N2 is larger than the amount of cloud in the area corresponding to the meshes N1 to N10 including the mesh N11. For example, the satellite image 105 may indicate that there are clouds in the areas corresponding to the meshes N1 to N10, and that there are no clouds in areas other than the areas corresponding to the meshes N1 to N10. That is, based on the lightness of each mesh of the satellite image 105, it is possible to grasp the predetermined area shown in the satellite image 105, the presence or absence of clouds in the vicinity of the predetermined area, the cloud amount, and the like.

  For example, the satellite image 105 is drawn based on the reflection of sunlight from a cloud, the ground surface, or the like, and may be, for example, a visible image whose brightness increases as the intensity of the reflected light increases. In this case, in the satellite image 105, the lightness of each mesh varies depending on the presence / absence of a cloud and the thickness (cloud amount) of the cloud. In this case, in the satellite image 105, for example, the brightness increases as the cloud amount increases. For example, the satellite image 105 may be an infrared image.

=== Customer ===
Hereinafter, with reference to FIG. 1, the consumer in this embodiment is demonstrated.
The customer 11 is provided in a corresponding area in the mesh N1. The consumer 11 has a measuring device M1, a load R1, and a generator G1.

  The load R1 is a power load connected to the distribution line L1. The load R1 is supplied with the second power W12 based on the power consumption according to the operating state of the load R1. That is, the second power W12 corresponds to the power consumption of the load R1.

  The generator G1 is a distributed power source such as a solar power generation device connected to the distribution line L1 and the load R1. The generator G1 outputs the first power W11 based on the amount of power generated according to the amount of solar radiation at the position where the generator G1 is provided. That is, the first power W11 corresponds to the amount of power generated by the generator G1. Here, the amount of solar radiation at the position where the generator G1 is provided is determined according to the amount of cloud at the position where the generator G1 is provided. Therefore, the power generation amount of the generator G1 is an amount corresponding to the cloud amount at the position where the generator G1 is provided.

  The measuring device M1 is a power meter with a communication function such as a smart meter. The measuring device M1 measures the first power W11 output from the generator G1 and the second power W12 supplied to the load R1, and outputs a measurement signal S1 indicating the measurement result. The measuring device M1 performs measurement at regular intervals such as 30 minutes, and outputs a measurement signal S1 indicating the measurement result at regular intervals.

  The measuring apparatus M1 further has position information indicating the position where the measuring apparatus M1 is provided. The position information may be based on, for example, GPS (Global Positioning System). The position information of the measuring device M1 is output as the measurement signal S1. That is, the measurement signal S1 indicates the position information of the measuring device M1 together with the above measurement result.

  Consumers 12, 13, and 14 are provided in areas corresponding to 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 measuring devices M2, M3, and M4 is the same as the configuration of the measuring device M1, the configuration of the generators G2, G3, and G4 is the same as the configuration of the generator G1, and the loads R2, R3, and R4. Is the same as the configuration of the load R1, and the configurations of the measurement signals S2, S3, and S4 are the same as the configuration of the measurement signal S1.

=== Control device ===
Hereinafter, with reference to FIG.3 and FIG.4, the control apparatus in this embodiment is demonstrated. FIG. 3 is a block diagram illustrating hardware of the control device according to the present embodiment. FIG. 4 is a block diagram showing a control device in the present embodiment.

  The control device 6 receives the measurement signals S1 to S4, S8, the weather signal S5, and the image signal S9, and outputs control signals S6 and S7 based on the information shown therein. The control 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 realizes various functions of the control device 6 by executing a program stored in the storage device 63 and controls the control device 6 in an integrated manner. The storage device 63 stores the above-described program and various types of information. The various information stored in the storage device 63 is indicated by information indicating weather such as wind speed and direction indicated by the weather signal S5, information indicated by the measurement signals S1 to S4, and measurement signal S8. Information indicating the temperature is included. Specifically, the various information stored in the storage device 63 includes the actual values and predicted values of the wind speed and direction of each mesh, the actual values of the first power W11, W21, W31, and W41, and the second power. The actual values of W12, W22, W32, and W42, the actual values of air temperature at the substation 200 provided with the measuring device M8, and the predicted values are included. The various information stored in the storage device 63 further includes position information indicating the positions of the measuring devices M1 to M4 and information indicating the satellite image 105. Note that the predicted temperature value may be calculated by the measuring device M8 or may be calculated by a weather forecasting device (not shown). The display device 64 is a display that displays information of the control device 6. The input device 65 is, for example, a keyboard or a mouse for inputting information to the control device 6. The communication device 62 communicates with the measurement devices M1 to M4, M8, the weather information device 5, the transmission voltage adjustment device 202, the weather satellite 9, and a tap switching device (not shown) via the network 600. The tap switching device is a device that switches the tap of the distribution transformer 201 in the substation 200 based on the control signal S6.

  The control device 6 further includes a prediction unit 66 (first arithmetic device, second arithmetic device), a first voltage distribution creation unit 67, a second voltage distribution creation unit 68 (third arithmetic device), and a control unit 69 (“control”). Also referred to as “various functions of the device 6”). The various functions of the control device 6 are realized by the CPU 61 executing programs stored in the storage device 63.

  The prediction unit 66 calculates predicted values of the first electric powers W11, W21, W31, and W41 of the consumers 11 to 14 in the future prediction target time based on various information stored in the storage device 63. Further, the prediction unit 66 calculates predicted values of the second electric power W12, W22, W32, and W42 of each of the consumers 11 to 14 in the future prediction target time based on various information stored in the storage device 63. .

  The first voltage distribution creation unit 67 calculates the first voltage distribution information 101 (FIG. 7) based on various information stored in the storage device 63. The second voltage distribution creation unit 68 calculates the second voltage distribution information 102 (FIG. 8) based on the calculation result of the prediction unit 66 and various information stored in the storage device 63.

  The control unit 69 (adjusting device) includes first voltage distribution information 101 created (calculated) by the first voltage distribution creating unit 67 and second voltage distribution information 102 created (calculated) by the second voltage distribution creating unit 68. Based on the above, the voltage of the distribution lines L1 and L2 is adjusted by controlling the distribution system 100.

=== Prediction unit ===
Hereinafter, the prediction unit in the present embodiment will be described with reference to FIGS. 1, 5, and 6. FIG. 5 is a diagram illustrating an image of the relationship between the temperature and the second power in the present embodiment. FIG. 6 is a diagram illustrating an image of the relationship between the cloud amount and the first power in the present embodiment.

<Predicted value of second power (FIG. 5)>
The prediction unit 66 calculates a predicted value of the second power W12 of the customer 11 at a future prediction target time based on various types of information stored in the storage device 63.

  The prediction unit 66 calculates correlation data for the second power W12 based on various types of information stored in the storage device 63. The correlation data regarding the second power W12 includes the actual value D11 of the second power W12 in the first time, the actual value D12 of the second power W12 in the second time after the first time, and the third It is data which shows the correlation with the actual value D22 of the temperature in time. The correlation data may represent a correlation expression indicating these correlations. When the actual values D11 and D22 are applied to this correlation equation, the actual value D12 of the second power W12 is calculated. The third time is a time corresponding to the second time, and may be the same time as the second time, for example, or may be a different time shifted by a predetermined time such as about 30 minutes from the second time. There may be.

  Thereafter, the prediction unit 66 calculates the predicted value D14 of the second power W12 at the prediction target time based on the calculated correlation data or the like for the second power W12. Specifically, for example, the prediction unit 66 performs the actual value D13 of the second power W12 in the fourth time after the second time with respect to the correlation equation indicated in the correlation data for the second power W12. And the predicted value D24 of the temperature at the sixth time corresponding to the fifth time as the prediction target time after the fourth time, and the prediction of the second power W12 at the fifth time as the prediction target time The value D14 is calculated.

  The sixth time is a time such that the relationship between the sixth time and the fifth time is similar to the relationship between the third time and the second time. That is, for example, when the third time and the second time are the same time, the sixth time is set to the same time as the fifth time. For example, when the third time is 30 minutes after the second time, the sixth time is a time 30 minutes after the fifth time.

  The fourth time is a time such that the relationship between the fourth time and the fifth time is similar to the relationship between the first time and the second time. That is, for example, when the first time is a time 100 minutes before the second time, the fourth time is a time 100 minutes before the fifth time.

  The fourth time may be the current time when the prediction unit 66 calculates the predicted value of the second power W12. The first to sixth times may be time, for example. The predicted value D24 is various information stored in the storage device 63 as described above, and is obtained by calculation based on a predetermined simulation or the like.

  The prediction unit 66 calculates predicted values of the second electric power W22, W32, and W42 of the consumers 12, 13, and 14 at the future prediction target time based on various information stored in the storage device 63. Note that the configuration in which the prediction unit 66 calculates the predicted values of the second power W22, W32, and W42 is the same as the configuration in which the prediction unit 66 calculates the predicted value of the second power W12, and thus description thereof is omitted. To do.

<Predicted value of first power (FIG. 6)>
The prediction unit 66 calculates a predicted value of the first power W11 of the consumer 11 at a future prediction target time based on various information stored in the storage device 63.

  The prediction unit 66 calculates correlation data for the first power W11 based on various information stored in the storage device 63. The correlation data regarding the first power W11 includes the actual value D41 of the first power W11 in the first time, the actual value D42 of the first power W11 in the second time after the first time, and the third It is data which shows a correlation with the track record value D52 of the cloud amount of the area corresponding to the mesh N1 in time. The correlation data may represent a correlation expression indicating these correlations. When the actual values D41 and D52 are applied to this correlation equation, the actual value D42 of the first power W11 is calculated. As described above, the third time is a time corresponding to the second time. For example, the third time may be the same time as the second time, or only a predetermined time such as about 30 minutes from the second time. It may be a different time shifted.

  Thereafter, the prediction unit 66 calculates a predicted value D44 of the first power W11 at the prediction target time based on the calculated correlation data or the like for the first power W11. Specifically, for example, the prediction unit 66 performs the actual value D43 of the first power W11 in the fourth time after the second time with respect to the correlation equation indicated in the correlation data for the first power W11. And the prediction value D54 of the cloud amount of the area corresponding to the mesh N1 at the sixth time corresponding to the fifth time as the prediction target time after the fourth time, and applying the prediction target time (fifth time) The predicted value D44 of the first power W11 at is calculated. The prediction unit 66 calculates a movement vector N102 (FIG. 2) for predicting cloud movement based on the satellite image 105 and the wind speed and direction of each mesh, and then calculates the movement vector 102 and the satellite image 105. Based on the above, a cloud amount prediction value D54 in the sixth time is calculated.

  The first to sixth time when the predicted value of the first power W11 is calculated corresponds to the first to sixth time when the predicted value of the second power W12 is calculated. .

  It is assumed that correspondence information indicating information indicating the lightness of each mesh in the satellite image 105 and information indicating the cloud amount corresponding to the lightness is further stored in the storage device 63. The prediction unit 66 refers to the correspondence information and appropriately converts between information indicating brightness and information indicating cloudiness, and calculates the above-described correlation data, or the predicted value of the second power W12 at the prediction target time D44 is calculated.

  The prediction unit 66 calculates predicted values of the first electric power W21, W31, and W41 of each of the consumers 12, 13, and 14 in the future prediction target time based on various information stored in the storage device 63. Note that the configuration in which the prediction unit 66 calculates the predicted values of the first power W21, W31, and W41 is the same as the configuration in which the prediction unit 66 calculates the predicted value of the first power W11. To do.

=== First Voltage Distribution Creation Unit ===
Hereinafter, the first voltage distribution creation unit in the present embodiment will be described with reference to FIGS. 1 and 7. FIG. 7 is a diagram showing first voltage distribution information in the present embodiment. The horizontal axis indicates the distance from the sending ends P10 and P20 in the distribution lines L1 and L2, and the vertical axis indicates the voltage value of the distribution lines L1 and L2.

<First voltage distribution information>
The first voltage distribution information 101 includes information indicating the voltages W17 and W27, the upper limit value Vt1, and the lower limit value Vt2. The voltage W17 indicates the voltage value for the fourth time when the position of the distribution line L1 is predicted. The voltage W27 indicates the voltage value for the fourth time when the position of the distribution line L2 is predicted. That is, the voltages W17 and W27 indicate voltage value distributions in the longitudinal direction of the distribution lines L1 and L2, respectively. The upper limit value Vt1 indicates the upper limit value of the voltage of the distribution lines L1 and L2. The lower limit value Vt2 indicates the lower limit value of the voltage of the distribution lines L1 and L2. The upper limit value Vt1 and the lower limit value Vt2 are determined for each of the tap sections T1 to T3 of the pole transformer (not shown) provided in the power distribution system 100.

  If the voltage values of the distribution lines L1 and L2 deviate from the range between the upper limit value Vt1 and the lower limit value Vt2 (also referred to as “appropriate voltage range”), there is a possibility that malfunctions of the loads R1 to R4 are caused. Accordingly, in order not to cause malfunctions of the loads R1 to R4, the distribution line L1, L2 is set within the proper voltage range (predetermined range), for example, by switching the tap of the distribution transformer 201, etc. It is necessary to adjust the voltages of L1 and L2. When the voltage values of the distribution lines L1 and L2 are within the appropriate voltage range, the loads R1 to R4 operate stably without causing malfunction or the like, for example.

<First voltage distribution generator>
The first voltage distribution creation unit 67 creates the first voltage distribution information 101 based on various information stored in the storage device 63. Specifically, the first voltage distribution creating unit 67 is indicated in, for example, the actual values of the first electric powers W11, W21, W31, and W41, the actual values of the second electric powers W12, W22, W32, and W42, and the position information. The first voltage distribution information 101 is created (calculated) based on the positions of the measuring devices M1 to M4. Since the first voltage distribution information 101 reflects the positions of the measuring devices M1 to M4, the calculation accuracy of the voltages W17 and W27 is improved.

=== Second Voltage Distribution Creation Unit ===
Hereinafter, the second voltage distribution creation unit in the present embodiment will be described with reference to FIGS. 1 and 8. FIG. 8 is a diagram showing second voltage distribution information in the present embodiment. The horizontal axis indicates the distance from the sending ends P10 and P20 in the distribution lines L1 and L2, and the vertical axis indicates the voltage value of the distribution lines L1 and L2.

<Second voltage distribution information>
The second voltage distribution information 102 includes information indicating the voltages W18 and W28, the upper limit value Vt1, and the lower limit value Vt2. The voltage W18 indicates the voltage value of the fifth time as the future prediction target time of each position in the distribution line L1. The voltage W28 indicates the voltage value of the fifth time as the future prediction target time of each position in the distribution line L2. That is, the voltages W18 and W28 indicate predicted distributions of voltage values in the longitudinal direction of the distribution lines L1 and L2, respectively.

<Second voltage distribution generator>
The second voltage distribution creation unit 68 calculates the second voltage distribution information 102 based on the calculation result of the prediction unit 66 and various information stored in the storage device 63. Specifically, the second voltage generating unit 68 uses the predicted values of the first powers W11, W21, W31, and W41, the predicted values of the second powers W12, W22, W32, and W42, and position information at the prediction target time. The second voltage distribution information 102 is created (calculated) based on the positions and the like of the respective measuring devices M1 to M4 shown. The second voltage distribution information 102 reflects the positions of the measuring devices M1 to M4, so that the calculation accuracy of the voltages W18 and W28 is improved.

=== Control unit ===
Hereinafter, the control unit according to this embodiment will be described with reference to FIGS. 1 and 6 to 9.

  FIG. 9 is a diagram illustrating the second voltage distribution information after the voltage value of the distribution line in the present embodiment has been changed. The horizontal axis indicates the distance from the sending ends P10 and P20 in the distribution lines L1 and L2, and the vertical axis indicates the voltage value of the distribution lines L1 and L2.

<Second voltage distribution information>
The second voltage distribution information 103 includes information indicating the voltages W19 and W29, the upper limit value Vt1, and the lower limit value Vt2. The voltage W19 indicates the voltage value of the fifth time as the future prediction target time of each position in the distribution line L1. The voltage W29 corresponds to the voltage value of the fifth time as the future prediction target time of each position in the distribution line L2.

<Control during forecast execution>
Based on the first voltage distribution information 101, the control unit 69 determines whether or not the voltages W17 and W27 have deviated from the appropriate voltage range, and controls the power distribution system 100 based on the determination result.

  For example, when it is determined that the voltage W17 deviates from the appropriate voltage range, the control unit 69 outputs the control signals S6 and S7 so that the voltage W17 is within the appropriate voltage range, and the voltage of the distribution line L1. Adjust. For example, when it is determined that the voltage W27 deviates from the appropriate voltage range, the control unit 69 outputs the control signals S6 and S7 so that the voltage W27 is within the appropriate voltage range, and the distribution line L2 Adjust the voltage. For example, when it is determined that both the voltages W17 and W27 are within the appropriate voltage range, the control unit 69 does not output the control signals S6 and S7.

<Control in prediction target time>
Based on the second voltage distribution information 102, the control unit 69 determines whether or not the voltages W18 and W28 have deviated from the appropriate voltage range.

  For example, when it is determined that the voltage W18 deviates from the appropriate voltage range, the control unit 69 adjusts the voltage of the distribution line L1 so that the voltage W18 becomes the voltage W19 (FIG. 9) within the appropriate voltage range. Calculate the amount. Thereafter, when the time has elapsed and the prediction target time is reached, the control unit 69 outputs control signals S6 and S7 in which the calculated adjustment amount is reflected to adjust the voltage of the distribution line L1. For example, when it is determined that the voltage W28 deviates from the appropriate voltage range, the control unit 69 sets the voltage of the distribution line L2 to set the voltage W28 to the voltage W29 (FIG. 9) within the appropriate voltage range. The adjustment amount is calculated. Thereafter, when the time has elapsed and the prediction target time is reached, the control unit 69 outputs control signals S6 and S7 in which the calculated adjustment amount is reflected to adjust the voltage of the distribution line L2. For example, when it is determined that both of the voltages W18 and W28 are within the appropriate voltage range, the control unit 69 does not output the control signals S6 and S7. The storage device 63 further stores, for example, system information for calculating the voltages of the distribution lines L1 and L2, including information indicating the line impedances of the distribution lines L1 and L2, the voltages of the sending ends P10 and P20, and the like. Suppose that it is done. The second voltage distribution creating unit 68 calculates the second voltage distribution information 102 based on the system information together with various information stored in the storage device 63.

=== Operation ===
Hereinafter, the operation of the control device according to the present embodiment will be described with reference to FIGS. 1 and 10. FIG. 10 is a flowchart showing the operation of the control device in the present embodiment.

  The control device 6 receives the measurement signals S1 to S4, S8, the weather signal S5, and the image signal S9 (step St11). Various types of information indicated in the received signal are stored in the storage device 63. The control device 6 calculates the first voltage distribution information 101 based on various information stored in the storage device 63 (step St12). Thereafter, the control device 6 controls the power distribution system 100 according to whether or not the voltages W17 and W27 deviate from the appropriate voltage range.

  The control device 6 calculates predicted values of the first powers W11, W21, W31, and W41 at the prediction target time based on various types of information stored in the storage device 63 (step St13). The control device 6 calculates predicted values of the second powers W12, W22, W32, and W42 at the prediction target time based on various types of information stored in the storage device 63 (step St14). The control device 6 calculates the second voltage distribution information 102 based on the calculation result of the prediction unit 66 and various information stored in the storage device 63 (Step St15).

  In the second voltage distribution information 102, for example, it is assumed that a part of the voltage W18 is higher than the upper limit value Vt1, and a part of the voltage W28 is lower than the lower limit value Vt2. The control device 6 calculates the first adjustment amount for the voltage of the distribution line L1 for decreasing the voltage W18 so that the voltage W18 becomes the voltage W19 (FIG. 9). The control device 6 calculates a second adjustment amount for the voltage of the distribution line L2 for increasing the voltage W28 so that the voltage W28 becomes the voltage W29 (FIG. 9). When the time has passed and the prediction target time is reached, the control device 6 outputs the control signals S6 and S7 reflecting the first and second adjustment amounts to adjust the voltages of the distribution lines L1 and L2 ( Step St16). Thereafter, the control device 6 ends the operation.

[Second Embodiment]
=== Distribution system ===
The power distribution system 100B in the present embodiment is obtained by changing the consumers 11 to 14 and the control device 6 to the customers 11B to 14B and the control device 6B in the power distribution system 100 of the first embodiment, respectively. The configuration of the distribution system 100B other than the consumers 11B to 14B and the control device 6B is the same as the configuration of the distribution system 100.

  Hereinafter, the power distribution system in the present embodiment will be described with reference to FIG. FIG. 11 is a diagram showing a power distribution system in the present embodiment. In addition, about the structure similar to FIG. 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  The power distribution system 100B includes consumers 11B to 14B and a control device 6B.

  The consumer 11B is provided in an area corresponding to the mesh N1. The consumer 11B has a measuring device M11.

  The measuring device M11 is a power meter with a communication function such as a smart meter. The measuring device M11 measures the first power W13 as surplus power supplied from the consumer 11B to the distribution line L1, and the second power W14 supplied from the distribution line L1 to the consumer 11B, and shows the measurement result The signal S11 is output. The measurement device M11 performs measurement at regular intervals such as 30 minutes, and outputs a measurement signal S11 indicating the measurement result at regular intervals.

  The measurement apparatus M11 further has position information indicating the position where the measurement apparatus M11 is provided. The position information may be based on, for example, GPS (Global Positioning System). The position information of the measuring device M11 is output as the measurement signal S11. That is, the measurement signal S11 indicates the position information of the measurement apparatus M11 together with the above measurement result.

  Consumers 12B, 13B, and 14B are provided in meshes N2, N3, and N4, respectively. The configurations of the consumers 12B to 14B are the same as the configuration of the customer 11B. That is, the configuration of the measurement devices M12, M13, and M14 is the same as the configuration of the measurement device M11, and the configuration of the measurement signals S12, S13, and S14 is the same as the configuration of the measurement signal S11.

  The control device 6B is a device for controlling the distribution system 100B and adjusting the voltages of the distribution lines L1 and L2.

=== Control device ===
Hereinafter, with reference to FIG.3 and FIG.4, the control apparatus in this embodiment is demonstrated.

  The control device 6B receives the measurement signals S11 to S14 and the weather signal S5, and outputs the control signals S6 and S7 based on the information shown therein. The control device 6B has a storage device 63B. Various information is stored in the storage device 63B. The various information stored in the storage device 63B includes information indicating weather such as the wind speed and direction indicated by the weather signal S5, information indicated by the measurement signals S1 to S4, and the measurement signal S8. Information indicating the temperature is included. Specifically, the various information stored in the storage device 63B includes the actual values and predicted values of the wind speed and the wind direction of each mesh, the actual values of the first power W13, W23, W33, and W43, and the second power. The actual values of W14, W24, W34, and W44, the actual values of air temperature at the substation 200 provided with the measuring device M8, and the predicted values are included. The various information stored in the storage device 63B further includes position information indicating the positions of the measuring devices M1 to M4 and information indicating the satellite image 105.

  The control device 6B further includes a prediction unit 66B. The prediction unit 66B calculates predicted values of the first powers W13, W23, W33, and W43 of the consumers 11B to 14B in the future prediction target time based on various information stored in the storage device 63B. Further, the prediction unit 66B calculates predicted values of the second electric power W14, W24, W34, and W44 of the consumers 11B to 14B at the future prediction target time based on various information stored in the storage device 63B. . The configuration for calculating the prediction value in the prediction unit 66B is the same as the configuration for calculating the prediction value in the prediction unit 66 (first embodiment).

  As described above, the control device 6 includes the prediction unit 66 and the control unit 69. The control device 6 is a device that adjusts the voltages of the distribution lines L1 and L2. Note that loads R1 and R2 as power loads and generators G1 and G2 as distributed power sources that supply power to the loads R1 and R2 are connected to the distribution line L1. Connected to the distribution line L2 are loads R3 and R4 as power loads and generators G3 and G4 as distributed power sources for supplying power to the loads R3 and R4. The prediction unit 66 includes the actual value D41 (actual power generation amount) of the first power W11 in the first time, the actual value D42 (actual power generation amount) of the first power W11 in the second time after the first time, Correlation data indicating the correlation with the actual value D52 (meteorological result) of the cloud amount at the third time is calculated. The predicting unit 66 calculates the above-described correlation data, the actual value D43 (actual power generation amount) of the first power W11 in the fourth time after the second time, and the prediction target time after the fourth time. The predicted value D44 (predicted power generation amount) of the first power W11 at the fifth time as the prediction target time is calculated based on the predicted value D54 (meteorological prediction) of the cloud amount at the sixth time corresponding to the fifth time as To do. The sixth time is a time having a relationship similar to the relationship between the second time and the third time between the fifth time and the fourth time. Similarly, the prediction unit 66 calculates predicted values of the first powers W21, W31, and W41 at the fifth time. Based on the predicted value D44 of the first power W11, the predicted values of the first power W21, W31, and W41 calculated by the prediction unit 66, the control unit 69 determines the voltage values of the distribution lines L1 and L2 in the fifth time. The voltage of the distribution lines L1 and L2 is adjusted so as to be within the appropriate voltage range. With these configurations, the voltages of the distribution lines L1 and L2 can be adjusted so that the voltage values of the distribution lines L1 and L2 are within the appropriate voltage range.

  The control device 6 further includes a second voltage distribution creation unit 68. Based on the calculation result of the prediction unit 66, the second voltage distribution creation unit 68 calculates voltages W18 and W28 (FIG. 8) as predicted distributions of voltage values in the longitudinal direction of the distribution lines L1 and L2. The control unit 69 adjusts the voltages of the distribution lines L1 and L2 based on the calculation result of the second voltage distribution creation unit 68. With these configurations, the voltages of the distribution lines L1 and L2 can be adjusted so that the voltage value at each position in the longitudinal direction of the distribution lines L1 and L2 is within the appropriate voltage range. Therefore, it becomes possible to supply the voltage which has the voltage value in the range according to the appropriate voltage range with respect to load R1 thru | or R4 provided in each position of the longitudinal direction of the distribution lines L1 and L2. In other words, it is possible to supply voltages for stably operating the loads R1 to R4 to the loads R1 to R4.

  In addition, the second voltage distribution creating unit 68 includes the second voltage distribution information 102 based on position information (position data) indicating positions according to positions where the loads R1 to R4 are connected to the distribution lines L1 and L2. The voltages W18 and W28 are calculated. With this configuration, it is possible to improve the calculation accuracy of the voltages W18 and W28 by reflecting the position information when calculating the voltages W18 and W28 in the second voltage distribution information 102. Therefore, the voltages of the distribution lines L1 and L2 can be reliably adjusted so that the voltage values of the distribution lines L1 and L2 are within the appropriate voltage range.

  Moreover, the control part 69 adjusts the voltage of the sending ends P10 and P20 in the distribution lines L1 and L2, respectively. That is, the control unit 69 adjusts the voltage generated on the upstream side of the loads R1 and R2 and the generators G1 and G2 in the distribution line L1. Further, the control unit 69 adjusts the voltage generated on the upstream side of the loads R3 and R4 and the generators G3 and G4 in the distribution line L2. Therefore, it is possible to increase or decrease the voltage value of the entire distribution lines L1 and L2 instead of adjusting only a part of the voltage values at each position in the longitudinal direction of the distribution lines L1 and L2. Therefore, the voltage of the distribution lines L1 and L2 can be reliably adjusted so that the voltage value at each position in the longitudinal direction of the distribution lines L1 and L2 is within the appropriate voltage range.

  Further, the prediction unit 66 calculates correlation data using the observation results of the meteorological satellite 9 that observes the weather at the positions where the generators G1 to G4 are provided as the actual weather results. For example, since it is not necessary to provide a solar radiation meter for measuring the solar radiation amount based on the cloud amount at the position where the generators G1 to G4 are provided, the cost for adjusting the voltages of the distribution lines L1 and L2 is reduced. be able to.

  Further, the prediction unit 66 calculates correlation data based on the cloud amount result value D52 as the weather result. The prediction unit 66 calculates the predicted value D44 of the first power W11 as the predicted power generation amount based on the cloud amount predicted value D54 as the weather prediction. That is, when calculating the correlation data, the actual value of the cloud amount with a relatively high (large) degree of correlation with the power generation amounts of the generators G1 to G4 is used. Further, when calculating the predicted power generation amount, the correlation data and the predicted cloud amount are used. Therefore, by improving the calculation accuracy of the predicted power generation amount, the voltages of the distribution lines L1 and L2 can be reliably adjusted so that the voltage values of the distribution lines L1 and L2 are within the appropriate voltage range.

  The first and second embodiments are intended to facilitate understanding of the present invention and are not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes equivalents thereof.

  In 1st Embodiment, although demonstrated that the control apparatus 6 adjusts the voltage of the sending ends P10 and P20 in the distribution lines L1 and L2, respectively, it is not limited to this. For example, by providing power capacitors, shunt reactors, etc. at positions corresponding to the positions where the loads R1 to R4 in the distribution lines L1 and L2 are connected, and controlling these power capacitors, shunt reactors, etc. It is good also as the control apparatus 6 adjusting the voltage of the position in which the electric power capacitor | condenser, shunt reactor, etc. in the distribution lines L1 and L2 are provided.

5 Meteorological information device 6, 6B Control device 9 Meteorological satellite 66, 66B Prediction unit 68 Second voltage distribution creation unit 69 Control unit L1, L2 Distribution line

Claims (7)

A voltage regulator that regulates the voltage of a power line to which a power load and a distributed power source that supplies power to the power load are connected,
The actual power generation amount of the distributed power source in the first time, the actual power generation amount of the distributed power source in the second time after the first time, and the weather actual results in the third time according to the second time, A first arithmetic unit that calculates correlation data indicating the correlation of
The actual power generation amount of the distributed power source in the fourth time after the second time and the same relationship as the relationship between the second time and the third time are the fifth time after the fourth time. 2nd to calculate the predicted power generation amount of the distributed power source in the fifth time based on the weather forecast in the sixth time between and the correlation data calculated by the first arithmetic unit An arithmetic unit;
An adjustment device for adjusting the voltage of the power line so that the voltage value of the power line in the fifth time is within a predetermined range based on a calculation result of the second calculation device;
A voltage regulating device comprising: A third arithmetic unit that calculates a predicted distribution of the voltage value in the longitudinal direction of the power line based on a calculation result of the second arithmetic unit;
The voltage adjustment device according to claim 1, wherein the adjustment device adjusts the voltage of the power line based on a calculation result of the third calculation device. 3. The voltage according to claim 2, wherein the third arithmetic unit calculates the predicted distribution based on position data indicating a position corresponding to a position where the distributed power source is connected to the power line. Adjustment device. The voltage regulator according to claim 1, wherein the regulator regulates a voltage generated upstream of the power load and the distributed power source in the power line. The said 1st arithmetic unit calculates the said correlation data by making the observation result of the observation apparatus which observes the weather of the position where the said distributed power supply is provided into the said weather results. Voltage regulator. The first arithmetic unit calculates the correlation data based on the actual value of the cloud amount as the weather result,
The voltage regulator according to claim 1, wherein the second arithmetic unit calculates the predicted power generation amount based on a cloud amount prediction value as the weather prediction. A voltage adjustment method for adjusting a voltage of a power line to which a power load and a distributed power source that supplies power to the power load are connected,
The actual power generation amount of the distributed power source in the first time, the actual power generation amount of the distributed power source in the second time after the first time, and the weather actual results in the third time according to the second time, A first step of calculating correlation data indicating the correlation of
The actual power generation amount of the distributed power source in the fourth time after the second time and the same relationship as the relationship between the second time and the third time are the fifth time after the fourth time. A second step of calculating the predicted power generation amount of the distributed power source in the fifth time based on the weather forecast in the sixth time between and the correlation data calculated in the first step When,
And a third step of adjusting the voltage of the power line so that the voltage value of the power line in the fifth time is within a predetermined range based on the calculation result of the second step. Adjustment method.