JP2012175800A - Voltage management device, voltage management method, and voltage management program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a burden of a worker managing voltage conditions, and to improve voltage quality.SOLUTION: The voltage management device obtains information on the voltage value at the downstream of a transformer 110 disposed in an electric circuit, the taps of the transformer 110 being switchable, and according to the obtained information the voltage management device calculates a first average which is the average of voltage values of each first predetermined time zone. Then a difference between the first average thus obtained and predetermined target voltage values for each first predetermined time zone is calculated. And a second average is calculated, the second average being an average of the above difference in a second predetermined time zone which is longer than the first predetermined time zone. Then, whether the second average exceeds a predetermined value is determined. After the determination, if the second average exceeds the predetermined value, a change command for commanding to change setting values is to be output to an auto voltage adjuster 130 adjusting the voltage values of the transformer 110.

Description

  The present invention relates to a voltage management device, a voltage management method, and a voltage management program for managing a voltage in an electric circuit.

  In the electric circuit that constitutes the power transmission and distribution system, a transformer with tap switching at load is installed in an electric station (substation) provided in the electric circuit, and the voltage sent from the electric station (substation) is adjusted. I have to. The automatic voltage regulation relay controls the voltage without intervention by the operator by controlling the switching of the tap in the transformer with a tap change during load based on a preset target voltage value (setting value). . Conventionally, the person in charge of voltage management constantly monitors the voltage state in the power transmission and distribution system.

  In the transmission / distribution system as described above, when a deviation from the target voltage value (setting value) has occurred, whether or not to change the target voltage value (setting value) in the corresponding transformer, so-called setting change The person in charge responsible for voltage management made this decision, which was complicated. Conventionally, when the person in charge of voltage management decides to make a setting change, the person in charge who performs the work on the corresponding transformer has installed the transformer that is the target of the setting change. It was cumbersome to go to (substation) and settling and changing the automatic voltage regulating relay that controls the switching of the tap of the transformer.

  In order to solve the above problems, conventionally, specifically, for example, the primary voltage input to the high-voltage automatic voltage regulator and the secondary voltage to be output are time-recorded to record the primary in one day, Means for recording the maximum and minimum values of the moving average voltage for 30 minutes of the secondary voltage, and means for recording the primary, secondary voltage, the number of tap switching, and the tap number before and after the tap switching. Timely recording in the data recording means, when grasping the operating status of the high-voltage automatic voltage regulator, the data recorded in the data recording means is taken out and taken into the data analysis means through the IC card reader for analysis There is a technology that makes it possible to grasp the voltage adjustment accuracy of the high-voltage distribution line, the load state, and the like based on the charted data (for example, see Patent Document 1 below).

  Also, in order to eliminate the above-mentioned problems, conventionally, for example, the secondary winding of the output transformer of the correction voltage generator is connected in series to the secondary coil of the instrument transformer that detects the line voltage. In order to correct the line voltage according to the voltage correction command given from the central command station, the output voltage of the instrument transformer is corrected by outputting a correction voltage that needs to be superimposed on the output voltage of the instrument transformer. There is a technology in which the voltage relay is applied with a voltage superimposed with the correction voltage, and the voltage relay generates a tap lowering command or a tap raising command depending on whether the applied input voltage is higher or lower than the set value. (For example, see Patent Document 2 below.)

Japanese Patent No. 3292430 Japanese Patent No. 4306826

  However, the conventional technique described in the above-mentioned Patent Document 1 can immediately recognize an apparatus failure or a deviation from the target value depending on the operation status, but remains operating in a state of deviation from the target value until the data is confirmed. The voltage quality is inferior because the operation does not exceed the voltage stipulated by law.

  In addition, the conventional technique described in the above-mentioned Patent Document 1 must go to an electric station each time to check data and make a setting change, and the work related to voltage management is complicated. There was a problem that the burden on the workers involved in the work was large.

  In addition, the conventional technique described in Patent Document 2 described above can make a setting change without going to an electric station, but an operator who is responsible for voltage management determines whether or not to make a setting change. Since it is necessary to perform the operation, the voltage state must be periodically checked, and the work related to the voltage management is complicated, and there is a problem that the burden on the worker related to the work is heavy.

  In order to solve the above-described problems caused by the conventional technology, the present invention aims to reduce the burden on the worker who manages the voltage state and to improve the voltage quality, the voltage management method, and the voltage management. The purpose is to provide a program.

  In order to solve the above-described problems and achieve the object, a voltage management device according to the present invention includes a voltage value acquisition unit that acquires information on a voltage value at a lower level of a transformer that is disposed in an electric circuit and is capable of tap switching. A first average value calculating means for calculating an average value (first average value) of the voltage values for each first predetermined time period based on the information acquired by the voltage value acquiring means; The second predetermined time longer than the first predetermined time zone is the difference between the first average value calculated by the average value calculating means and the preset target voltage value for each first predetermined time zone. A second average value calculating means for calculating an average value (second average value) in the belt, and whether the second average value calculated by the second average value calculating means is equal to or greater than a predetermined amount set in advance. Determination means for determining whether or not the determination means is the first A change instruction output means for outputting a change instruction for instructing a change of a settling value to an automatic voltage regulator that adjusts the voltage value of the transformer when it is determined that the average value of the voltage is equal to or greater than the predetermined amount; It is provided with.

  Further, in the voltage management device according to the present invention, in the above invention, the determination means determines whether the second average value is equal to or more than the specified amount for each second predetermined time period, The change instruction output means is a settling value in a first predetermined time zone corresponding to a first average value for calculating a second average value for which it is determined that the second average value is equal to or greater than the specified amount. The voltage management apparatus according to claim 1, wherein a change instruction for instructing a change is output.

  Further, in the voltage management device according to the present invention, in the above invention, the first average value in the second predetermined time period is determined based on the first average value and the target voltage value. Change amount calculating means for calculating a change amount to be added to or subtracted from each of the first average values so as to approach the target voltage value in the first predetermined time period, wherein the change instruction output means includes the change amount The change instruction including information on the change amount calculated by the calculation means is output.

  The voltage management device according to the present invention relates to whether or not the change instruction can be output via a predetermined user interface when the determination unit determines that the difference is equal to or larger than the threshold value in the above invention. Input request output means for outputting an input request for requesting input of instruction information, wherein the change instruction output means outputs the change instruction based on instruction information for the input request output by the input request output means; Features.

  In the voltage management device according to the present invention, in the above invention, an output number storage unit that stores the number of outputs of the change instruction by the change instruction output unit, and an output number stored in the output number storage unit are An output number determination unit that determines whether or not the set number of times is greater than or equal to the set number of times, and when the output number of times determination unit determines that the output number of times is equal to or greater than the specified number of times, via the user interface, And an informing means for informing that the number of times of output is equal to or more than the specified number of times.

  Further, the voltage management method according to the present invention is a voltage management method of a voltage management device capable of communicating with an automatic voltage regulator that adjusts a voltage value of a transformer that is disposed in an electric circuit and that can be changed over by a tap. Based on the voltage value acquisition step for acquiring information on the voltage value at the lower level of the transformer, and the information acquired in the voltage value acquisition step, the average value of the voltage values for each first predetermined time period (first average) Value) and a difference between the first average value calculated in the first average value calculation step and the preset target voltage value for each first predetermined time period The second average value calculating step of calculating an average value (second average value) in a second predetermined time period longer than the first predetermined time period, and calculating in the second average value calculating step The second average value set in advance A determination step of determining whether or not the predetermined amount is greater than or equal to a predetermined amount, and an automatic adjustment of the voltage value of the transformer when the second average value is determined to be equal to or greater than the predetermined amount in the determination step. A change instruction output step for outputting a change instruction for instructing the voltage regulator to change the settling value.

  The voltage management program according to the present invention is a voltage management program used for a voltage management apparatus capable of communicating with an automatic voltage regulator that adjusts a voltage value of a transformer that is arranged in an electric circuit and that can be switched between taps. Based on the voltage value acquisition step for acquiring information on the voltage value at the lower level of the transformer, and the information acquired in the voltage value acquisition step, the average value of the voltage values for each first predetermined time zone (first A first average value calculating step for calculating (average value), a first average value calculated in the first average value calculating step, and a preset target voltage value for each first predetermined time period In a second average value calculating step for calculating an average value (second average value) of a difference in a second predetermined time period longer than the first predetermined time period, and in the second average value calculating step Calculated second level A determination step of determining whether or not a value is equal to or greater than a predetermined amount, and a voltage value of the transformer when it is determined in the determination step that the second average value is equal to or greater than the predetermined amount. And a change instruction output step of outputting a change instruction for instructing a change of the set value to the automatic voltage regulator for adjusting the setting value.

  According to the voltage management device, voltage management method, and voltage management program of the present invention, it is possible to reduce the burden on the operator related to the management of the voltage state and to improve the voltage quality.

It is explanatory drawing which shows the system configuration | structure of a voltage management system provided with the voltage management apparatus of embodiment concerning this invention. It is a block diagram which shows the hardware constitutions of the computer apparatus which implement | achieves the computer apparatus which implement | achieves the voltage management apparatus in the voltage management system of embodiment concerning this invention. It is explanatory drawing which shows the target voltage value database with which the voltage management apparatus of embodiment concerning this invention is provided. It is explanatory drawing which shows the measured value database with which the voltage management apparatus of embodiment concerning this invention is provided. It is explanatory drawing which shows the process result database with which the voltage management apparatus of embodiment concerning this invention is provided. It is explanatory drawing which shows the settling change amount database with which the voltage management apparatus of embodiment concerning this invention is provided. It is explanatory drawing which shows the assumed value database with which the voltage management apparatus of embodiment concerning this invention is provided. It is a graph which shows an example of a voltage curve. It is explanatory drawing which shows an example of an output frequency database. It is explanatory drawing (the 1) which shows the example of a display screen of the voltage management apparatus of embodiment concerning this invention. It is explanatory drawing (the 2) which shows the example of a display screen of the voltage management apparatus of embodiment concerning this invention. It is a block diagram which shows the functional structure of the voltage management apparatus of embodiment concerning this invention. It is a flowchart (the 1) which shows the process sequence of the voltage management apparatus in the voltage management system of embodiment concerning this invention. It is a flowchart (the 2) which shows the process sequence of the voltage management apparatus in the voltage management system of embodiment concerning this invention.

  Exemplary embodiments of a voltage management device, a voltage management method, and a voltage management program according to the present invention will be explained below in detail with reference to the accompanying drawings.

(System configuration of voltage management system)
First, a system configuration of a voltage management system including a voltage management device according to an embodiment of the present invention will be described. FIG. 1 is an explanatory diagram showing a system configuration of a voltage management system including a voltage management apparatus according to an embodiment of the present invention.

  In FIG. 1, a voltage management system 100 according to an embodiment of the present invention includes a transformer 110, an instrument transformer 120, an automatic voltage regulation relay 130, and a voltage management device 140. The transformer 110, the instrument transformer 120, and the automatic voltage adjustment relay 130 are installed for each electric station (substation) 101 (101-1, 101-2, ..., 101-N). The voltage management device 140 is installed in the control center 102. The control station 102 adjusts the voltage at the plurality of electrical stations 101.

  The instrument transformer 120 and the voltage management device 140, and the automatic voltage regulation relay 130 and the voltage management device 140 are connected to be communicable via a network such as the Internet. Alternatively, the instrument transformer 120 and the voltage management device 140, and the automatic voltage regulation relay 130 and the voltage management device 140 may be communicably connected via a dedicated network.

  The transformer 110 is installed in the electric circuit which comprises a power transmission / distribution system. The transformer 110 changes (transforms) the voltage supplied from the higher system (primary side, high voltage side) than the transformer 110, and converts the transformed voltage into the lower system (secondary side, low voltage side) of the transformer 110. To supply. For example, the transformer 110 performs a so-called voltage step-down in which the voltage is converted so that the lower system voltage is lower than the upper system voltage than the transformer 110.

  Specifically, the transformer 110 changes a high voltage such as 6600 V or 22000 V supplied from a higher system than the transformer 110 to a voltage that is easy to use in a 100 V or 200 V general household electrical facility. The transformer 110 is not limited to the one that performs step-down. The transformer 110 may perform, for example, a so-called voltage boosting that converts a voltage so that a lower system voltage is higher than a higher system voltage than the transformer 110.

  The transformer 110 includes a load tap switching device. The on-load tap switching device includes a on-load tap switching device, a driving device for the on-load tap switching device, an accessory device, and the like. In this embodiment, the transformer 110 can change the voltage of the lower system by switching the tap without causing a power failure of the voltage of the lower system.

  The on-load tap switching device switches the taps of the windings in the transformer 110 in a state where the load of the transformer 110 is applied according to the voltage fluctuation, and changes the turns ratio in the transformer 110 to change the winding ratio in the electric circuit. Adjust the voltage of the flowing electricity. The turns ratio in the transformer 110 can be changed within a predetermined range, for example, by selecting a predetermined position on a tap provided in the winding with a tap selector.

  The on-load tap switching device may perform voltage adjustment in the upper system of the transformer 110, or may perform voltage adjustment in the lower system of the transformer 110. The transformer 110 and the on-load tap switching device may be separate from each other, or may be realized by a on-load tap switching transformer in which the transformer 110 and the on-load tap switching device are combined.

  The voltage adjustment method of the on-load tap switching device may be a direct method or an indirect method. In the direct type, the load current of the winding directly connected to the external circuit is connected so as to pass through the tap changer at the time of load. The indirect type is wired so that the current flowing through the excitation winding of the series transformer 110 passes through the on-load tap changer. The on-load tap switching device may include a mechanism that limits the circulating current that flows between the taps of the transformer 110 during tap switching. Since the on-load tap switching device and the on-load tap switching device provided integrally with the transformer 110 can be easily realized by a known technique, description thereof will be omitted.

  The automatic voltage regulation relay 130 is provided between the voltage management device 140 and the transformer 110 in the voltage management system 100, and controls the transformer 110 (the on-load tap switching device included in the transformer 110). The automatic voltage regulation relay 130 can be realized by an auxiliary relay (control relay) including a switch realized by an electromagnet or a semiconductor, and opens and closes the switch based on an electric signal output from the voltage management device 140. By controlling, the transformer 110 (the on-load tap switching device provided in the transformer 110) is controlled.

  An instrument transformer (VT: Voltage Transformer, PT: Potential Transformer) 120 is provided in a lower level (lower system side) than the transformer 110 in the electric circuit, and a high voltage (for example, AC 110 V) that is easy to use for a control circuit or the like. ). The instrument transformer 120 is configured to reduce the electrical resistance of the windings and the leakage of magnetic flux in order to reduce the measurement error as compared with the transformer 110. The instrument transformer 120 has a small capacity as compared with the transformer 110, so that a small amount of current flows to the secondary side.

  The voltage management device 140 acquires information on the voltage value stepped down by the instrument transformer 120, performs a predetermined calculation based on the acquired information on the voltage value, and according to the result of the predetermined calculation, the automatic voltage regulator 130. Predetermined processing for changing the settling value is performed. The voltage management device 140 can be realized by a computer device such as a personal computer, for example. The hardware configuration of the computer device that implements the voltage management device 140 will be described later (see FIG. 2). The predetermined calculation and predetermined processing performed by the voltage management device 140 will be described later (see FIG. 4).

(Hardware configuration of computer device realizing voltage management device 140)
Next, a hardware configuration of a computer device that realizes the voltage management device 140 in the voltage management system 100 according to the embodiment of the present invention will be described. FIG. 2 is a block diagram showing a hardware configuration of a computer device that realizes a computer device that realizes the voltage management device 140 in the voltage management system 100 according to the embodiment of the present invention.

  In FIG. 2, a computer device that realizes the voltage management device 140 in the voltage management system 100 according to the embodiment of the present invention includes a CPU 201, a ROM 202, a RAM 203, an HDD 204, an HD 205, and an FDD 206 that are detachable. An FD 207 as an example of a storage medium, a display 208, an operation unit 209, a printer 210, and a network I / F 211 are provided. In the voltage management system 100 according to the embodiment of the present invention, the units 201 to 211 included in the computer device that implements the voltage management device 140 are connected by a bus 212.

  The CPU 201 controls the entire computer device that implements the voltage management device 140. The ROM 202 stores a program such as a boot program. The RAM 203 is used as a work area for the CPU 201. The HDD 204 controls data read / write with respect to the HD 205 according to the control of the CPU 201. The HD 205 stores data written under the control of the HDD 204.

  The FDD 206 controls reading / writing of data with respect to the FD 207 according to the control of the CPU 201. The FD 207 stores data written under the control of the FDD 206. Various storage media such as a CD-ROM (CD-RW), MO, and DVD (Digital Versatile Disk) may be used as the removable storage media instead of or in addition to the FD 207. In this case, the computer device that realizes the voltage management device 140 in the voltage management system 100 according to the embodiment of the present invention includes a drive that controls reading / writing of data with respect to various storage media.

  The display 208 can be realized by a display device including a liquid crystal panel, for example. The liquid crystal panel that realizes the display 208 can display arbitrary character strings, numbers, symbols, and the like. Specifically, the liquid crystal panel that implements the display 208 displays, for example, various display screens (see FIG. 3) related to voltage adjustment.

  The operation unit 209 receives various input operations by the user. Specifically, the operation unit 209 can be realized by, for example, a touch panel, a keyboard, a numeric keypad, and the like. The operation unit 209 may be realized by a mouse, for example. An operation unit 209 realized by a touch panel, a keyboard, a numeric keypad, a mouse, or the like outputs a signal corresponding to an input operation on the operation unit 209.

  The printer 210 performs a printing process for printing a graph indicating a voltage curve or the like on a predetermined medium. The printer 210 can be realized by a printer of various known printing methods such as a laser printer, an ink jet printer, and an impact dot printer. The printer 210 includes a paper holding mechanism that holds paper, a printer head that performs printing on the paper, and the like.

  The network I / F 211 is connected to a network such as the Internet, and is connected to an external device such as the automatic voltage adjustment relay 130 and the instrument transformer 120 via the network. The network I / F 211 controls the interface between the network and the inside of the computer device that implements the voltage management device 140, and controls data input / output between the computer device that implements the voltage management device 140 and an external device. .

  The voltage management apparatus 140 acquires information on the voltage value stepped down by the instrument transformer 120 by communicating with the instrument transformer 120. In the voltage management system of this embodiment, when there are a plurality of transformers 110, the voltage management device 140 is connected to the instrument transformer 120, which is the source of the information on the voltage value, in addition to the information on the voltage value. The identification information of the transformer 110 obtained is acquired. The identification information of the transformer 110 is information unique to the transformer 110 that can identify the transformer 110 in the voltage management system, and can be realized by, for example, an arbitrary number of digits.

(Example of database provided in voltage management device 140)
Next, a database provided in the voltage management device 140 will be described. Various databases included in the voltage management device 140 are provided in the HD 205 included in the computer device that implements the voltage management device 140.

  The various databases included in the voltage management device 140 are not limited to those provided integrally in a storage medium such as the HD 205 included in the computer device that implements the voltage management device 140. The various databases included in the voltage management device 140 are storage media provided separately from the computer device that implements the voltage management device 140, or storage media provided in a computer device that is different from the computer device that implements the voltage management device 140. May be provided.

(Example of target voltage value database)
Next, a target voltage value database provided in the voltage management device 140 according to the embodiment of the present invention will be described. FIG. 3 is an explanatory diagram showing a target voltage value database provided in the voltage management device 140 according to the embodiment of the present invention.

  In FIG. 3, the target voltage value database 300 provided in the voltage management apparatus 140 according to the embodiment of the present invention stores a target voltage value in association with each other for a first predetermined time period set in advance. The target voltage value can be realized by an arbitrary numerical value set in advance by an operator who performs voltage management work in the voltage management system 100 (see “(1) initial setting” in FIG. 1). In the voltage management system 100, when there are a plurality of transformers 110, the target voltage value may be set to the same value across the plurality of transformers 110 or may be set to an individual value for each transformer 110. .

  The first predetermined time period can be realized by a certain time between a certain time and a certain time in a predetermined period. Specifically, for example, when “1 day (24 hours)” is a predetermined period, “1 to 2 o'clock (1:59:59)”, “2 o'clock to 3 o'clock (2:59) 59 seconds) ”,...,“ 23:00 to 24:00 (23:59:59) ”can be set as the first predetermined time zone. Specifically, for example, when “1 month” is set as the predetermined period, “1 day (0 hour 0 minute 0 second of the day to 23:59 minute 59 second of the day)”, “2 days (2 hours, 0 minutes 0 minutes 0 seconds to 2 days 23 hours, minutes 59 minutes 59 seconds) ", ..., 30 days (30 days 0 hours 0 minutes 0 seconds to 30 days 23 hours 59 minutes 59 seconds) "can be set as the first predetermined time zone.

(Example of measured value database)
Next, a measurement value database provided in the voltage management device 140 according to the embodiment of the present invention will be described. FIG. 4 is an explanatory diagram showing a measurement value database provided in the voltage management device 140 according to the embodiment of the present invention.

  In FIG. 4, the measurement value database 400 included in the voltage management device 140 according to the embodiment of the present invention includes the first predetermined time zone (information that can specify the first predetermined time zone). The voltage value acquired (measured) in the predetermined time zone (information on the voltage value acquired in the first predetermined time zone) is stored in association with each other. When there are a plurality of transformers 110 in which the voltage management system according to the embodiment of the present invention manages voltages, the measurement value database 400 associates voltage values for each first predetermined time period for each transformer 110. Remember.

  In the voltage management system according to the embodiment of the present invention, the acquisition (measurement) of the voltage value in the first predetermined time zone is performed once or more in the first predetermined time zone. When the acquisition (measurement) of the voltage value is performed once in the first predetermined time zone, the measurement value database 400 acquires the voltage value (one time) obtained (measurement) for each first predetermined time zone ( The information about the voltage value for one acquisition (measurement) is stored (see “(2) Data accumulation” in FIG. 1).

  Alternatively, when the voltage value is acquired (measured) a plurality of times in the first predetermined time zone, the measured value database 400 obtains the voltage for the plurality of times acquired (measured) for each first predetermined time zone. The average value (information regarding the average value of the voltage values for a plurality of times of acquisition (measurement)) is stored.

  When there are a plurality of transformers 110 for managing voltages by the voltage management system according to the embodiment of the present invention, the measured value database 400 includes the voltage values (first values) for each first predetermined time period for each transformer 110. Information on the voltage value for each predetermined time period) is stored in association with each other. When the voltage value is acquired (measured) a plurality of times in the first predetermined time zone, the measured value database 400 is the average value (first value) of the voltage value for each first predetermined time zone for each transformer 110. Information relating to an average value of voltage values for each predetermined time period) is stored in association with each other. In this case, the voltage management device 140 associates predetermined identification information for identifying each transformer 110 with the voltage value for each first predetermined time period (information regarding the voltage value for each first predetermined time period). Remember.

  The measured value database 400 accumulates and stores all average values of voltage values acquired in the past. Alternatively, the measured value database 400 stores the average value of voltage values acquired in an arbitrary period, such as “for 10 years from the current date and time”, among the average values of voltage values acquired in the past. Also good. In the measured value database 400, for example, when the transformer 110 is replaced, the average value of the voltage values related to the different transformers 110 is the voltage of another transformer 110 even if the transformer 110 is installed in the same electric station. Store as the average value. In addition, the measurement value database 400 may store not only the average value of the voltage value but also information about the voltage value used for calculating the average value, that is, the raw measurement value.

(Example of processing result database)
Next, a processing result database provided in the voltage management device 140 according to the embodiment of the present invention will be described. FIG. 5 is an explanatory diagram showing a processing result database provided in the voltage management device 140 according to the embodiment of the present invention.

  In FIG. 5, the processing result database 500 included in the voltage management device 140 according to the embodiment of the present invention includes a maximum value of voltage values in the first predetermined time zone among the voltage values in the first predetermined time zone ( Information relating to the maximum value of the voltage value in the first predetermined time zone) is stored in association with each first predetermined time zone. Further, the processing result database 500 stores the minimum value of the voltage value in the first predetermined time zone (information on the minimum value of the voltage value in the first predetermined time zone) among the voltage values in the first predetermined time zone. The first predetermined time zone is stored in association with each other.

  The maximum value of the voltage value in the first predetermined time zone is the highest voltage value among a plurality of voltage values acquired in the same time zone in a predetermined period longer than the first predetermined time zone. Specifically, the maximum value of the voltage value in the first predetermined time zone is, for example, the voltage value for 30 times acquired at 1 o'clock every day in the month when the predetermined period is one month. Of these, the highest voltage value is assumed.

  The “predetermined period” for calculating the maximum value of the voltage value in the first predetermined time zone or the minimum value of the voltage value in the predetermined time zone is not limited to one month. The predetermined period may be, for example, 1 year, 5 years, or 10 years. The predetermined period may be a period after the acquisition of the voltage value is started, for example.

  The minimum value of the voltage value in the first predetermined time zone is the lowest voltage value among a plurality of voltage values acquired in the same time zone in a predetermined period longer than the first predetermined time zone. Specifically, the minimum value of the voltage value in a predetermined time zone is, for example, the highest among the voltage values for 30 times acquired at 1 o'clock every day in the month when one month is a predetermined period. A low voltage value is assumed. The predetermined period for obtaining the maximum value and the minimum value of the voltage value is preferably the same period.

  In addition, the processing result database 500 stores an average value of voltage values in the first predetermined time period (information on the average value of voltage values in the first predetermined time period) in association with each other for the first predetermined time period. . In this embodiment, hereinafter, the “average value of voltage values in the first predetermined time zone” will be described as “first average value”.

  In addition, the processing result database 500 stores a difference between the first average value and the target voltage value (information on the difference between the first average value and the target voltage value) in association with each other for each first predetermined time period. . The difference between the first average value and the target voltage value is the first predetermined value corresponding to the first average value and the target voltage value stored in association with the target voltage value database 300 for each first predetermined time period. It can be calculated based on the target voltage value in the time zone.

  Further, the processing result database 500 stores the average value of the difference (information regarding the average value of the difference) in the second predetermined time period. In this embodiment, hereinafter, “the average value of the differences in the second predetermined time zone” will be described as the “second average value”. The second predetermined time period can be longer than the first predetermined time period.

  The second predetermined time period can be realized, for example, by the predetermined period that is longer than the first predetermined time period. Specifically, for example, “1 o'clock to 2 o'clock (1:59:59)”, “2 o'clock to 3 o'clock (2:59:59)”,. 23:59:59 ”, etc., when the first predetermined time zone is the time zone from one hour to the next hour,“ 2 o'clock to 4 o'clock (3:59:59) ” 1st predetermined time zone such as “time”, “12 hours from 7 o'clock to 19 o'clock (18:59:59)”, “4 hours from 19 o'clock to 1 o'clock (0:59:59)” A longer time zone can be set as the second predetermined time zone.

(An example of a settling change database)
Next, a setting change amount database included in the voltage management device 140 according to the embodiment of the present invention will be described. FIG. 6 is an explanatory diagram showing a settling change amount database included in the voltage management device 140 according to the embodiment of the present invention. In FIG. 6, the settling change amount database 600 provided in the voltage management apparatus 140 according to the embodiment of the present invention stores the settling change amount as the change amount. The settling change amount can be calculated based on the second average value in the processing result database 500 described above. Specifically, the settling change amount can be calculated by rounding to the settable step of the automatic voltage regulating relay.

(An example of an assumed value database)
Next, an assumed value database provided in the voltage management device 140 according to the embodiment of the present invention will be described. FIG. 7 is an explanatory diagram showing an assumed value database included in the voltage management device 140 according to the embodiment of the present invention. In FIG. 7, the assumed value database 700 included in the voltage management apparatus 140 according to the embodiment of the present invention associates the assumed value after the set change for each first predetermined time period with each first predetermined time period. Remember.

  The assumed value after the settling change can be calculated by subtracting the settling change amount in the settling change amount database 600 from the first average value in the processing result database 500 described above. The assumed value database 700 stores the assumed value after the settling change in the first predetermined time zone in association with the first predetermined time zone.

(Example of voltage curve)
Next, an example of a voltage curve will be described. FIG. 8 is a graph showing an example of a voltage curve. In FIG. 8, the voltage curve indicates a first average value for each first predetermined time period in the measurement value database 400, a maximum value and a minimum value for each first predetermined time period in the processing result database 500, And it can create based on the assumed value after the setting change in said assumed value database 700.

  In FIG. 8, reference numeral 801 indicates a target voltage value. In FIG. 8, reference numerals 802 and 803 denote an upper limit value (see reference numeral 802) of the operation width with respect to the target voltage value and a lower limit value (see reference numeral 803) of the operation width with respect to the target voltage value. The assumed value after the settling change (see reference numeral 804) is calculated by subtracting the settling change amount in the same first predetermined time period from each first average value in the first predetermined time period. be able to.

  In FIG. 8, reference numerals 805, 806, and 807 are voltage curves (actual results) based on voltage values actually measured by the instrument transformer 120. Reference numeral 805 indicates a first average value, and reference numeral 806 indicates each The maximum value of the voltage value in the first predetermined time zone is shown, and the reference numeral 807 shows the minimum value of the voltage value in each first predetermined time zone. As can be seen from FIG. 8, the assumed value 804 after the settling change is closer to the target voltage value (target value) than before the settling change.

(Example of output count database)
Next, an example of the output count database will be described. FIG. 9 is an explanatory diagram of an example of the output count database. In FIG. 9, the output count database 900 stores the output count of the change instruction from the voltage management device 140 to the automatic voltage regulation relay 130. The change instruction is information for instructing the automatic voltage regulator 130 that adjusts the voltage value of the transformer 110 to change the set value, and the automatic voltage is supplied from the voltage management device 140 based on the voltage value acquired in the past. It is output to the regulating relay 130. The method for outputting the change instruction will be described later.

  The output count database 900 stores the output count of the change instruction from the voltage management device 140 to the automatic voltage regulation relay 130 for each transformer 110. When one automatic voltage adjustment relay 130 is connected to one transformer 110, the output frequency database 900 automatically adjusts the output frequency of the change instruction to the automatic voltage adjustment relay 130 from the voltage management device 140. You may memorize | store for every relay 130. FIG.

(Display screen example)
Next, a display screen example of the voltage management device 140 according to the embodiment of the present invention will be described. 10 and 11 are explanatory diagrams showing examples of display screens of the voltage management device 140 according to the embodiment of the present invention. 10 and 11, display screens 1000 and 1100 are displayed on a display 208 included in a computer device that implements the voltage management device 140.

  In FIG. 10, the display screen 1000 displays information related to the transformer 110 that performs setting change, information related to the voltage value of the transformer 110, and the like. The information regarding the transformer 110 that performs the setting change can be realized by, for example, information that can identify the corresponding transformer 110 and an electric station where the transformer 110 is installed. Information on the voltage value of the transformer 110 is, for example, described as a target voltage value for each first predetermined time zone or a first average value for each first predetermined time zone (in FIG. 10, “actual voltage value”). ), And can be realized by information on the settling change amount.

  Further, the display screen 1000 requests input of instruction information regarding whether to execute the setting change according to the information displayed on the display screen 1000, that is, whether to output the change instruction. The administrator of the voltage management device 140 performs a predetermined operation on the operation unit 209 in a state where the display screen 1000 is displayed on the display 208, thereby performing an “execute” key for executing the settling change or “not performing the settling change”. By operating the “do not execute” key, instruction information indicating whether or not the change instruction can be output is input to the voltage management apparatus 140. When the instruction information is input by operating the “execute” key in a state where the display screen 1000 is displayed, the voltage management apparatus 140 sends the corresponding automatic voltage adjustment relay 130 to the corresponding automatic voltage adjustment relay 130 according to the input instruction information. Output a change instruction.

  Further, the display screen 1000 displays a “confirm voltage curve” key that receives an input of a display instruction for displaying another display screen 1100 that displays information related to the information displayed on the display screen 1000. The administrator of the voltage management apparatus 140 operates the “confirm voltage curve” key by performing a predetermined operation on the operation unit 209 in a state where the display screen 1000 is displayed on the display 208, and displays another display screen 1100. Is input to the voltage management device 140. When a display instruction is input by operating the “confirm voltage curve” key in a state where the display screen 1000 is displayed, the voltage management apparatus 140 displays another display screen 1100 according to the input display instruction. indicate.

  In FIG. 11, the display screen 1100 is displayed when the “confirm voltage curve” key is operated by performing a predetermined operation on the operation unit 209 while the display screen 1000 is displayed on the display 208. Is displayed. The display screen 1100 displays information related to the transformer 110 that performs the setting change, information related to the assumed value after the setting change, a graph indicating the voltage curve, and the like.

  The display screen 1100 displays information related to the assumed value after the setting change based on the information stored in the assumed value database 700. The display screen 1100 includes a first average value for each first predetermined time period in the measurement value database 400, a maximum value and a minimum value for each first predetermined time period in the processing result database 500, and The voltage curve shown in FIG. 8 created based on the assumed value after the settling change in the assumed value database 700 is shown in the form of a graph.

(Functional configuration of voltage management device 140)
Next, a functional configuration of the voltage management device 140 in the voltage management system 100 according to the embodiment of the present invention will be described. FIG. 12 is a block diagram showing a functional configuration of the voltage management device 140 according to the embodiment of the present invention.

  12, each function of the voltage management device 140 in the voltage management system 100 according to the embodiment of the present invention includes a voltage value acquisition unit 1201, a storage unit 1202, an output count storage unit 1202a, and a first average. Value calculation unit 1203, second average value calculation unit 1213, determination unit 1204, change amount calculation unit 1205, input request output unit 1206, display unit 1207, operation reception unit 1208, and change instruction reception unit 1209, a change instruction output unit 1210, an output count determination unit 1211, and a notification unit 1212.

  In the voltage management system 100 according to the embodiment of the present invention, the voltage value acquisition unit 1201, the storage unit 1202, the output count storage unit 1202a, the first average value calculation unit 1203, the second average value calculation unit 1213, and the determination unit 1204, change amount calculation unit 1205, input request output unit 1206, display unit 1207, operation reception unit 1208, change instruction reception unit 1209, change instruction output unit 1210, output count determination unit 1211, and notification unit 1212 It can implement | achieve by each part with which the computer apparatus which implement | achieves is provided.

  The voltage value acquisition unit 1201 acquires information on the voltage value at the lower level of the transformer 110 that is arranged in the electric circuit and can be switched. The information about the voltage value is information that can specify the voltage output to the lower level of the transformer 110, and can be acquired by measuring the voltage value stepped down by the instrument transformer 120, for example.

  For example, the voltage value acquisition unit 1201 acquires information on the voltage value once in each first predetermined time period. Specifically, for example, “1 o'clock to 2 o'clock (1:59:59)”, “2 o'clock to 3 o'clock (2:59:59)”,. 23:59:59) ”is set as the first predetermined time zone, the voltage value acquisition unit 1201 indicates that the current time is“ 1: 0 ”,“ 2: 0 ”,. Every time it arrives, information about the voltage value is acquired. For example, the voltage value acquisition unit 1201 may acquire information on the voltage value a plurality of times in each first predetermined time period.

  Or the voltage value acquisition part 1201 may acquire the information regarding a voltage value, for example, whenever predetermined time passes after acquiring the information regarding a voltage value. Specifically, for example, “1 o'clock to 2 o'clock (1:59:59)”, “2 o'clock to 3 o'clock (2:59:59)”,. 23:59:59) ”is set as the first predetermined time zone, the voltage value acquisition unit 1201 displays“ 1: 0 ”,“ 1:10 ”,“ 1:20 ”,. -Information about a voltage value may be acquired every time 10 minutes have passed, such as "2: 0", "2:10",.

  The storage unit 1202 stores information on the voltage value acquired by the voltage value acquisition unit 1201 (see “(2) Data accumulation” in FIG. 1). Specifically, the storage unit 1202 stores various types of information in the measurement value database 400 described above. The storage unit 1202 stores various types of information in the processing result database 500 described above. The storage unit 1202 stores information in the settling change amount database 600, information in the assumed value database 700, and the like.

  The storage unit 1202 includes an output count storage unit 1202a. The output count storage unit 1202a stores the output count of the change instruction from the voltage management device 140 to the automatic voltage regulation relay 130. The output count storage unit 1202a stores the output count of the change instruction for each transformer 110. The output count storage unit 1202a can be realized by the output count database 900 described above, for example.

  The first average value calculation unit 1203 calculates the first average value based on the information acquired by the voltage value acquisition unit 1201. The first average value calculation unit 1203 has the same time period (for example, “1 to 2 o'clock (1:59:59) for a predetermined period (for example, one month) longer than the first predetermined time period. The first average value is calculated based on the plurality of voltage values acquired in “)”).

  For example, the first average value calculation unit 1203 calculates the first average value every time the voltage value acquisition unit 1201 acquires information on the voltage value. Or the 1st average value calculation part 1203 may calculate a 1st average value, for example, whenever the memory | storage part 1202 memorize | stores the information regarding the voltage value which the voltage value acquisition part 1201 acquired. . In addition, the first average value calculation unit 1203 may calculate the first average value every time a predetermined time arrives, for example, a predetermined time after calculating the first average value last time. The first average value may be calculated every time elapses.

  Based on the first average value calculated by the first average value calculation unit 1203 and the preset target voltage value for each first predetermined time period, the second average value calculation unit 1213 An average value (see “average value of B” in FIG. 5) is calculated. For example, when “2 hours from 2 o'clock to 4 o'clock” is the second predetermined time zone, the second average value calculation unit 1213 calculates the first average value and the target voltage at “2 o'clock to 3 o'clock”. The average value of the difference between the value and the difference between the first average value and the target voltage value at “3 to 4 o'clock” is calculated as the second average value.

  The determination unit 1204 determines whether or not the second average value calculated by the second average value calculation unit 1213 is equal to or larger than a predetermined amount set in advance ("(3) Voltage status check" in FIG. 1). (Refer to “(4) Setting change study”). The determination unit 1204 determines, for each second predetermined time period, whether or not the second average value calculated by the second average value calculation unit 1213 is equal to or greater than a predetermined amount set in advance.

  The “specified amount”, that is, the “threshold for determining the second average value” can be arbitrarily set by the administrator of the voltage management system 100, for example. The threshold for determining the second average value is set to the same value in all the second predetermined time zones. Further, a different threshold value for determining the second average value may be set for each second predetermined time period.

  The change amount calculation unit 1205 calculates a settling change amount (change amount) based on the first average value and the target voltage value. The set change amount is a value that is added to or subtracted from each first average value so that each first average value approaches the target voltage value (target value) in the corresponding time zone, and the change amount calculation unit 1205. Calculates the settling change amount (change amount) when the second average value calculated by the second average value calculation unit 1213 is equal to or greater than the specified amount.

  When the determination unit 1204 determines that the second average value is equal to or greater than the specified amount, the input request output unit 1206 indicates instruction information regarding whether or not the change instruction can be output via a predetermined user interface. An input request for requesting input is output. The predetermined user interface realizes the exchange of information between a computer device that implements the voltage management device 140 or a program executed by the computer device and a human (an operator responsible for voltage management). For example, the voltage management device 140 It can be realized by a display unit 1207 such as a display 208 included in the computer device that realizes the above.

  When the determination unit 1204 determines that the second average value is equal to or greater than the specified amount, the input request output unit 1206 is realized by, for example, the display 208 included in the computer device that implements the voltage management device 140. The above display screen 1000 is displayed on the display unit 1207, and the operator can select either the “execute” key for executing the setting change or the “do not execute” key for not executing the setting change. Input is requested (see “(5) Analysis information, confirmation of execution of settling change” in FIG. 1).

  The operation reception unit 1208 receives an input of information indicating whether or not to execute the setting change in response to the input request output from the input request output unit 1206. For example, the operation receiving unit 1208 displays a display screen 1000 on the display 208 of the computer device that implements the voltage management device 140, and receives a predetermined input operation on the operation unit 209 to execute an “execute” key or Any key operation of the “do not execute” key is received, and a signal corresponding to the received key operation is output to the change instruction receiving unit 1209.

  The change instruction accepting unit 1209 operates the “execute” key by accepting a predetermined input operation to the operation unit 209 while the display screen 1000 is displayed on the display 208 of the computer device realizing the voltage management device 140. If so, a change instruction for instructing execution of the setting change is accepted (see “(6) Approval for setting change execution” in FIG. 1).

  The change instruction output unit 1210 outputs a change instruction based on the instruction information for the input request output by the input request output unit 1206 (see “(7) Settling change” in FIG. 1). For example, when the input request output unit 1206 outputs an input request by displaying the display screen 1000, the change instruction output unit 1210 receives an operation of the “execute” key by the operator in the operation reception unit 1208. Output change instructions.

  The change instruction is instruction information for instructing the automatic voltage regulator 130 that adjusts the voltage value of the transformer 110 to change the set value, and includes information on the set change amount calculated by the change amount calculation unit 1205. For example, the change instruction output unit 1210 outputs a change instruction for instructing a change in the settling value so that the assumed value after the settling change approaches the target voltage value (target value). The target voltage value may be a value arbitrarily set by the operator (“(8) settling of target voltage” in FIG. 1) or a set value calculated by the voltage management device 140. .

  For example, the change instruction output unit 1210 outputs a change instruction to the automatic voltage adjustment relay 130 that performs tap switching control of the corresponding transformer 110. When the automatic voltage adjustment relay 130 receives the change instruction output from the voltage management device 140, the automatic voltage adjustment relay 130 changes the set value for controlling the corresponding transformer 110 according to the received change instruction.

  The change instruction output unit 1210 may output a change instruction when the determination unit 1204 determines that the second average value is equal to or greater than a specified amount. That is, in this case, if the above-described determination unit 1204 determines that the second average value is equal to or greater than the specified amount, the input request output unit 1206 does not output an input request, and the automatic voltage regulation relay of the corresponding transformer 110 A change instruction is output to 130. In this case, since the input request is not output by the input request output unit 1206, the input of the operator's instruction information (“execute” key) for the input request is not waited for.

  For example, the change instruction output unit 1210 may output a change instruction instructing to switch the settling value in a specific time zone. In this case, the automatic voltage adjustment relay 130 changes the set value in the corresponding time zone based on the change instruction.

  The output count storage unit 1202a stores the number of output of the change instruction by the change instruction output unit 1210. The output count storage unit 1202a stores the number of output of the change instruction by the change instruction output unit 1210 for each automatic voltage adjustment relay 130. When one automatic voltage regulating relay 130 controls the tap switching of the plurality of transformers 110, the output count storage unit 1202a stores the output count of the change instruction output by the change instruction output unit 1210 for each transformer 110. May be. Thereby, the switching frequency of the set value can be managed for each automatic voltage regulating relay 130 or each transformer 110.

  The output count determination unit 1211 determines whether the output count stored in the output count storage unit 1202a is equal to or greater than a preset specified count. The prescribed number of times can be arbitrarily set by, for example, an operator of the voltage management system 100. The specified number of times may be set for each automatic voltage regulating relay 130 or for each transformer 110. Thereby, for example, different management can be performed between the transformer 110 that is operating without any problem and the transformer 110 that is determined to require fine monitoring.

  When the output number determination unit 1211 determines that the output number is equal to or greater than the specified number, the notification unit 1212 notifies that the output number is equal to or greater than the specified number via the user interface. For example, the notification unit 1212 displays on the display 208 provided in the computer device that implements the voltage management device 140 such as “automatic tap switching has reached the specified number of times” or “check the state of the transformer”. The number of times of output is displayed by displaying a message indicating that the number of times of output is equal to or greater than the specified number of times, information indicating the applicable transformer 110 and the electric station where the transformer 110 is installed, and the like. Notify that the specified number of times has been exceeded.

(Processing procedure of voltage management device 140)
Next, a processing procedure of the voltage management device 140 in the voltage management system according to the embodiment of the present invention will be described. 13 and 14 are flowcharts showing the processing procedure of the voltage management device 140 in the voltage management system according to the embodiment of the present invention.

  In the flowchart of FIG. 13, it is first determined whether or not it is time to acquire (measure) voltage values (information on voltage values) in the first predetermined time period (step S1301). In step S1301, for example, when the acquisition of the voltage value (information about the voltage value) is performed once every first predetermined time period, the acquisition time of the voltage value (information about the voltage value) is, for example, “1 o'clock”. It can be the time when the hour arrives, such as “0 minute”, “2: 0”,.

  In step S1301, when it is not the acquisition (measurement) time of the voltage value (information on the voltage value) in the first predetermined time zone (step S1301: No), the process waits until the acquisition time comes. On the other hand, in step S1301, when it is the time of acquisition (measurement) of the voltage value (information on the voltage value) in the first predetermined time zone (step S1301: Yes), from the instrument transformer 120 of the corresponding transformer 110. , Respectively, to acquire a voltage value (information on the voltage value) (step S1302). Then, the voltage value (information regarding the voltage value) acquired in step S1302 is stored in the measured value database 400 (step S1303), and the series of processes is terminated.

  In the flowchart of FIG. 14, it is first determined whether or not it is time to confirm the target voltage value (step S1401). In step S1401, when it is not the confirmation time of the target voltage value (step S1401: No), it waits until the confirmation time of the target voltage value. On the other hand, if it is time to confirm the target voltage value in step S1401 (step S1401: Yes), the voltage value (information on the voltage value) of each transformer 110 is acquired (step S1402). In step S1402, with reference to the measurement value database 400, the voltage value (information regarding a voltage value) concerning the applicable transformer 140 is acquired.

  Then, predetermined data processing is performed based on the voltage value (information regarding the voltage value) acquired in step S1402 (step S1403). In step S1403, for example, the maximum value or the minimum value of the voltage value in each first predetermined time zone for each transformer is acquired. In step S1403, for example, a first average value in each first predetermined time zone is calculated based on the acquired voltage value. In step S1403, a difference between the target voltage value and the first average value is calculated, and a second average value (B average value) that is an average value of the difference in the second predetermined time period is calculated. To do.

  Next, for each second predetermined time period, it is determined whether or not the second average value (B) is equal to or greater than a specified amount (step S1404). In step S1404, when the second average value (B) is not equal to or greater than the specified amount (step S1404: No), the values are shown in FIG. 8 based on the various values acquired in step S1402 and the values obtained by calculation. A voltage curve is created (step S1405), and a series of processing ends.

  On the other hand, if the second average value (B) is greater than or equal to the specified amount in step S1404 (step S1404: Yes), the settling change amount based on the various values acquired in step S1402 and the values obtained by calculation. Is calculated (step S1406), and based on the various values acquired in step S1402 and the values obtained by the calculation, an assumed value after the voltage setting change is calculated (step S1407).

  Next, a voltage curve is created based on the various values acquired in step S1402, the values obtained by calculation, the settling change amount calculated in step S1406, and the assumed value after the settling change of voltage calculated in step S1407. (Step S1408). Then, an input request is output (step S1409).

  As a result of outputting the input request in step S1409, it is determined whether or not there has been an input instruction for changing the setting by operating the operation unit 209 (step S1410). In step S1410, when there is no input instruction for changing the setting (step S1410: No), the series of processing ends.

  In step S1410, when there is an input instruction to perform setting change by an operation on the operation unit 209 as a result of outputting the input request in step S1409 (step S1410: Yes), a change instruction is given to the corresponding automatic voltage regulating relay 130. Is output (step S1411), and the number of times of setting change, which is the number of output of the change instruction, is stored (step S1412). In step S1412, for example, the output count of the corresponding transformer 140 in the output count database 900 is added “one time”.

  Then, it is determined whether or not the number of output of the change instruction is greater than or equal to the specified number (step S1413). The specified number of times is an arbitrary number determined in advance by an operator who manages the voltage management system 100, and can be arbitrarily set, for example, “5 times”, “8 times”, and the like. The specified number of times may be the same for all the transformers 140 constituting the voltage management system 100, or may be different for each transformer 140.

  In step S1413, when the number of output of the change instruction is not equal to or greater than the specified number (step S1413: No), the series of processing ends. On the other hand, in step S1413, when the output number of change instructions is equal to or greater than the specified number (step S1413: Yes), an alarm is output (step S1414), and the series of processes is terminated.

  In step S1414, for example, “There is a possibility of automatic voltage regulator failure”, “Please check the corresponding transformer”, “Management No. Alarm output is realized by displaying a message such as “****” (Hiroshima Electric Power Station). Alternatively, in step S1414, for example, a speaker is connected to a computer device that implements the voltage management device 140, and a warning sound such as “beep-beep”, “beep”, “beep-beep”, etc. is output via the speaker. An alarm may be output by outputting. Or you may implement | achieve the output of an alarm using both the display 208 with which the computer apparatus which implement | achieves the voltage management apparatus 140 is provided, and the speaker connected to the said computer apparatus.

  The process shown in FIGS. 13 and 14 is executed for each transformer 140. That is, in the process shown in FIG. 13, if the voltage management system 100 includes 100 transformers 140, the voltage values (information on voltage values) in the first predetermined time zone for each transformer 140. It is determined whether or not it is an acquisition (measurement) time, and voltage values (information on voltage values) are acquired (measurement) from the transformer 120 of the corresponding transformer 110 determined to fall under the acquisition (measurement) time. To do.

  In the processing shown in FIG. 14, if the voltage management system 100 includes 100 transformers 140, each transformer 140 determines whether or not it is time to confirm the target voltage value. The voltage value (information regarding the voltage value) of the transformer 110 determined to be the confirmation time is acquired (step S1402).

  As described above, the voltage management device 140 according to the embodiment of the present invention acquires information on the voltage value in the lower level of the transformer 110 that is arranged in the electric circuit and can be switched, and based on the acquired information. The second average value is calculated using the first average value calculated in this step, and it is determined whether the calculated second average value is equal to or greater than the prescribed amount. As a result of the determination, the second average value is determined. Is equal to or greater than a specified amount, a change instruction for instructing the change of the set value is output to the automatic voltage regulator 130 that adjusts the voltage value of the transformer 110.

  As described above, according to the voltage management device 140 of the embodiment of the present invention, the function of automatically monitoring the voltage value in the electric circuit without involving the operator's work, compared to the conventional system for managing the voltage in the electric circuit. And a function that automatically determines whether or not to change the voltage value in the circuit without involving the operator's work, and if it makes a decision to change the setting, it automatically does not involve the operator's work. A function of correcting the voltage value can be added.

  According to the voltage management device 140 according to the embodiment of the present invention, the operator can individually confirm the voltage status of each electric station 101, or can determine whether a settling change is necessary based on the confirmed data. Without setting, the settling change can be performed when the need for a settling change occurs. Thereby, it is possible to reduce the burden on the operator for checking and judging the voltage state. Further, this makes it possible to reliably perform the setting change when the setting change is necessary, so that the voltage quality can be improved. As described above, according to the voltage management device 140 of the embodiment of the present invention, the voltage situation can be optimized while simultaneously reducing the burden on the worker who manages the voltage situation and improving the voltage quality. Can do.

  In addition, the voltage management device 140 according to the embodiment of the present invention determines whether or not the second average value is equal to or greater than the specified amount for each second predetermined time period, and the second average value is the specified value. When it is determined that the amount is greater than or equal to the amount, a change instruction is issued to instruct a change in the settling value in the first predetermined time zone in which the first average value for calculating the second average value is applicable. It may be configured. According to such a voltage management device 140, since the set value in the time zone in which the set change is required can be changed as appropriate, the voltage state can be further optimized.

  In addition, the voltage management device 140 according to the embodiment of the present invention is configured so that each first time period in the second predetermined time period longer than the first predetermined time period is based on the first average value and the target voltage value. A change amount to be added to or subtracted from each first average value so that the average value approaches the target voltage value in each first predetermined time period is calculated, and a change instruction including information on the calculated change amount is output. It is characterized by. According to the voltage management device 140 of the embodiment of the present invention, the reference value can be changed based on the change amount calculated based on the actual measurement value, so that the settling change can be performed according to the actual site. it can. As a result, the voltage state can be further optimized.

  In addition, the voltage management device 140 according to the embodiment of the present invention issues an input request for requesting input of instruction information regarding whether or not to output a change instruction via a predetermined user interface when the difference is equal to or greater than a threshold value. The change instruction is output based on the instruction information for the input request that is output.

  According to the voltage management device 140 of the embodiment of the present invention, when the setting change is necessary, the operator confirms whether or not the setting change can be executed, and the worker who has requested confirmation confirms the setting change. Settling changes can be made when instructed. Accordingly, the operator can make the setting change without going to the electric station 101 where the setting change is required.

  Further, according to the voltage management device 140 of the embodiment of the present invention, the setting change can be performed only when the setting change is necessary and the operator has instructed the setting change. As a result, unnecessary settling changes are not made, and voltage quality can be improved.

  In addition, the voltage management device 140 according to the embodiment of the present invention stores the number of outputs of the change instruction, and when the stored number of outputs is equal to or more than a predetermined number of times set in advance, the number of outputs via the user interface Is notified that the number of times is equal to or more than the prescribed number.

  According to the voltage management device 140 of the embodiment of the present invention, when the change instruction is output more than the specified number of times, the operator can be assumed to have a malfunction of the transformer 110 itself, such as a failure of the transformer 110. it can. Thereby, the malfunction of transformer 110 itself can be discovered and eliminated at an early stage. As a result, the voltage quality can be improved.

  In the embodiment described above, as an example of the embodiment according to the present invention, the set values of the plurality of automatic voltage regulators 130 are confirmed using the voltage management device 140, and the set values are changed as necessary. Although the voltage management system 100 has been described, the present invention is not limited to this. For example, instead of collectively managing the set values in the automatic voltage regulator 130 constituting the voltage management system 100 by the voltage management device 140, the set value may be managed for each automatic voltage regulator 130. Good.

  In this case, specifically, each automatic voltage regulator 130 is installed by installing a voltage management program (automatic voltage check program) for realizing the above-described voltage management method in each microcomputer included in each automatic voltage regulator 130. It is possible to optimize the voltage state of the transformer 110 corresponding to. In this case, more specifically, a voltage management program (automatic voltage check program) is installed in each memory constituting a microcomputer included in the automatic voltage regulator 130 together with the CPU.

  Thereby, compared with the case where the voltage management apparatus 140 manages collectively the set value in the automatic voltage regulator 130 which comprises the voltage management system 100, the voltage management method mentioned above can be implement | achieved reliably. For example, in the voltage management system 100 in which the voltage management device 140 collectively manages the set values in the plurality of automatic voltage regulators 130, when the voltage management device 140 fails, all the automatic voltage regulators 130 are normally operated. A situation that does not work may occur.

  On the other hand, when the set value is managed for each automatic voltage regulator 130, even if any of the automatic voltage regulators 130 constituting the voltage management system breaks down, the failed automatic voltage The automatic voltage regulators 130 other than the regulator 130 continue to operate normally and can control the transformer 110 normally. As a result, it is possible to optimize the voltage situation and maintain the optimized voltage situation while simultaneously reducing the burden on the operator involved in the management of the voltage situation and improving the voltage quality.

  The voltage management method described in this embodiment can be realized by executing a program prepared in advance on a computer such as a personal computer or a workstation. This program is recorded on a computer-readable recording medium such as a hard disk, a flexible disk, a CD-ROM, an MO, and a DVD, and is executed by being read from the recording medium by the computer. The program may be a transmission medium that can be distributed via a network such as the Internet.

  As described above, the voltage management device, the voltage management method, and the voltage management program according to the present invention are useful for managing the voltage value in the electric circuit, and are particularly suitable for managing the voltage value transformed by the transformer in the electric station. ing.

DESCRIPTION OF SYMBOLS 100 Voltage management system 110 Transformer 120 Instrument transformer 130 Automatic voltage adjustment relay 140 Voltage management apparatus 1201 Voltage value acquisition part 1202 Storage part 1203 First average value calculation part 1204 Judgment part 1205 Change amount calculation part 1206 Input request output part 1202a Output count storage unit 1210 Change instruction output unit 1211 Output count determination unit 1212 Notification unit 1213 Second average value calculation unit

Claims (7)

Voltage value acquisition means for acquiring information about the voltage value at the lower level of the transformer disposed in the electric circuit and capable of tap switching;
First average value calculating means for calculating an average value (first average value) of the voltage values for each first predetermined time period based on the information acquired by the voltage value acquiring means;
A second difference between the first average value calculated by the first average value calculating means and a preset target voltage value for each first predetermined time period is longer than the first predetermined time period. Second average value calculating means for calculating an average value (second average value) in a predetermined time period of
Determining means for determining whether or not the second average value calculated by the second average value calculating means is equal to or greater than a predetermined amount set in advance;
When the determination means determines that the second average value is equal to or greater than the predetermined amount, a change instruction for instructing the automatic voltage regulator for adjusting the voltage value of the transformer to change the set value is output. Change instruction output means,
A voltage management device comprising: The determination means determines whether or not the second average value is equal to or more than the specified amount every second predetermined time period,
The change instruction output means is a settling value in a first predetermined time zone corresponding to a first average value for calculating a second average value for which the second average value is determined to be equal to or greater than the specified amount. The voltage management apparatus according to claim 1, wherein a change instruction for instructing a change is output. Based on the first average value and the target voltage value, the first average value in the second predetermined time period is brought close to the target voltage value in the first predetermined time period. A change amount calculating means for calculating a change amount to be added to or subtracted from each of the first average values;
The voltage management apparatus according to claim 1, wherein the change instruction output unit outputs the change instruction including information on the change amount calculated by the change amount calculation unit. When the determination unit determines that the difference is equal to or greater than the threshold value, an input request output unit that outputs an input request for requesting input of instruction information regarding whether or not the change instruction can be output via a predetermined user interface With
4. The voltage management apparatus according to claim 1, wherein the change instruction output unit outputs the change instruction based on instruction information for the input request output by the input request output unit. . Output count storage means for storing the output count of the change instruction by the change instruction output means;
An output number determination means for determining whether or not the output number stored in the output number storage means is equal to or greater than a predetermined number of times set in advance;
A notification means for notifying that the output count is equal to or greater than the specified count via the user interface when the output count determination means determines that the output count is equal to or greater than the specified count;
The voltage management device according to claim 1, wherein the voltage management device is provided. A voltage management method of a voltage management device capable of communicating with an automatic voltage regulator that adjusts a voltage value of a transformer that is arranged in an electric circuit and that can be switched taps,
A voltage value obtaining step for obtaining information on a voltage value at a lower level of the transformer;
A first average value calculating step of calculating an average value (first average value) of the voltage values for each first predetermined time period based on the information acquired in the voltage value acquiring step;
A second difference between the first average value calculated in the first average value calculating step and a preset target voltage value for each of the first predetermined time periods is longer than the first predetermined time period. A second average value calculating step of calculating an average value (second average value) in a predetermined time period of
A determination step of determining whether or not the second average value calculated in the second average value calculation step is greater than or equal to a predetermined amount set in advance;
When it is determined in the determination step that the second average value is equal to or greater than the predetermined amount, a change instruction is issued to instruct the automatic voltage regulator that adjusts the voltage value of the transformer to change the set value. A change instruction output process to perform,
The voltage management method characterized by including. A voltage management program used in a voltage management device capable of communicating with an automatic voltage regulator that adjusts a voltage value of a transformer that is arranged in an electric circuit and that can be switched between taps,
A voltage value obtaining step for obtaining information on a voltage value at a lower level of the transformer;
A first average value calculating step of calculating an average value (first average value) of the voltage values for each first predetermined time period based on the information acquired in the voltage value acquiring step;
A second difference between the first average value calculated in the first average value calculating step and a preset target voltage value for each of the first predetermined time periods is longer than the first predetermined time period. A second average value calculating step of calculating an average value (second average value) in a predetermined time period of
A determination step of determining whether or not the second average value calculated in the second average value calculation step is greater than or equal to a predetermined amount set in advance;
When it is determined in the determination step that the second average value is equal to or greater than the predetermined amount, a change instruction is issued to instruct the automatic voltage regulator that adjusts the voltage value of the transformer to change the set value. A change instruction output process to perform,
A voltage management program for executing

Images