JP5837384B2 - Voltage adjusting device and voltage adjusting method - Google Patents

Description

  The present invention relates to a voltage regulator and a voltage regulation method, and more specifically, to perform power transmission and distribution while coordinating between a specific regional power transmission system and a distributed power source in the system.

  In recent years, many self-power generation facilities such as solar power generation facilities are installed in consumers, and the self-power generation facilities are connected to a power distribution system as a distributed power source. In such a power distribution system, an automatic voltage regulator (SVR: Step Voltage Regulator) is used (for example, refer to Patent Document 1). In such an automatic voltage regulator, voltage adjustment is performed so that the secondary side voltage is within a predetermined voltage range.

  Some automatic voltage regulators incorporate a line drop compensation (LDC) that automatically changes and adjusts the bus voltage according to the load current. The line voltage drop compensator calculates the line voltage rise or drop based on the secondary side current information and the pre-registered line impedance information, and the line voltage rise or drop is added to the secondary side voltage. Adjust the voltage with. Here, the impedance of the secondary high-voltage distribution line is used as the line impedance. Normally, the line impedance from the automatic voltage regulator to the load center point is registered, and the voltage at the load center point is adjusted so as to be within a pre-registered voltage range.

  In addition, the voltage information of each point of the distribution line is collected by a switch having a sensor function, etc., and based on the voltage information, the remote control type automatic voltage regulator that can be operated remotely is used to adjust the delivery voltage, Attempts have also been made to optimize the voltage at each point on the distribution line (see, for example, Patent Document 2). In the technique described in this document, system information related to the power flow and voltage of the regional power transmission and distribution system is collected, and measurement information related to the power consumption and power consumption of each consumer is collected. Based on the collected information, the regional power information center adjusts the output of the regional power transmission and distribution system voltage regulator, and sends a control signal for regulating the output of the power generator to the voltage regulator and the power output regulator. Output.

  In addition, a solar power generation system for eliminating unfairness due to suppression of voltage increase in the solar power generation system and utilizing energy generated by the solar cell is also being studied (for example, see Patent Document 3). In the technique described in this document, the solar power generation apparatus transmits data indicating the output state of the power conversion apparatus to the commercial power system to another solar power generation apparatus. And based on the output state received from the other solar power generation device, the power output which a power converter outputs to a commercial power grid is controlled.

Japanese Patent Laid-Open No. 2001-190025 (first page, FIG. 1) Japanese Patent Laying-Open No. 2004-56996 (first page, FIG. 1) JP 2006-180660 A (first page, FIG. 1)

  As described above, the automatic voltage regulator monitors and adjusts the secondary side voltage. However, when the voltage adjustment is performed so that the secondary side voltage is within the pre-registered voltage range, it is performed based on the voltage information of the automatic voltage regulator installation point of the distribution line, and the low-voltage side customer connection Voltage information at points is not taken into account.

  Further, since the line voltage drop compensator described above is also for adjusting the voltage at the load center point, there is no guarantee that the connection point voltage of all consumers is within an appropriate range. Therefore, depending on the line configuration and impedance distribution, the connection point voltage of the customer may deviate from the appropriate voltage range. In general, only the high-voltage distribution line is considered for the line impedance, and the line impedance of the low-voltage line and the lead-in line is not considered. Therefore, the voltage rise and drop due to the line impedance of the low-voltage line and the lead-in line are not taken into consideration, and the possibility that the connection point voltage of the consumer deviates further increases.

  On the other hand, the photovoltaic power generation is provided with a power conditioner that suppresses the power generation output when the interconnection point voltage exceeds the upper limit value of the appropriate voltage range. And the situation which deviates from an appropriate voltage range further by the line voltage rise accompanying the reverse power flow to the system | strain by electric power generation output is prevented. In addition, the upper limit value of the appropriate voltage range in which the power conditioner suppresses the output is normally set to 107V. For this reason, when the connection point voltage of the consumer having the photovoltaic power generation facility deviates from the appropriate voltage range, the power sale of the consumer is hindered and the consumer is damaged. In addition, since the interconnection voltage is different for each consumer, there may be a customer who tends to deviate from the appropriate voltage range and a customer who does not easily deviate. In this case, there will be a difference in the amount of electricity sold, resulting in unfairness.

Here, it demonstrates concretely using FIG. Each parameter in FIG. 7 is as follows.
V21: Secondary voltage at SVR point I21: Pass current at SVR point Z21: High voltage line impedance from SVR to branch point I11, I12: High voltage from branch point to pole transformer A, branch point to pole transformer B Line current Z11, Z12: High voltage line impedance of branch point to pole transformer A, Branch point to pole transformer B ZT1, ZT2: Impedance of pole transformers A, B V11, V12: Pillar transformer A, B secondary side voltage I01, I02, I03, I04: pole transformer-current of low voltage line of each consumer Z01, Z02, Z03, Z04: pole transformer-low voltage line impedance of each customer V01, V02 , V03, V04: interconnection point voltages of each consumer (A, B, C, D) Here, it is assumed that Z01>Z02>Z03> Z04.

  The consumers A to D are installed with the power generation device 10 by photovoltaic power generation, and the power generation output is performed to the system in the daytime, the reverse power flows I01 to I04 flow to the system side, and the impedance of the distribution lines and pole transformers Causes a voltage rise.

  Actually, since the power generation output is consumed by the load power consumption of the consumers A to D, it is not always a reverse power flow. However, for the sake of simplicity, it is assumed here that the load consumption is small with respect to the power generation output. . Further, at night, there is no power generation output, so only load consumption occurs, and I01 to I04 flow forward, causing a voltage drop.

  In the above case, the connection point voltage of each consumer (A to D) in FIG. 1 is expressed by the following relational expression.

(Equation 1)
V01 = V21 + {I21 · Z21 + I11 · (ZT1 + Z11) + I01 · Z01}
V02 = V21 + {I21 · Z21 + I11 · (ZT1 + Z11) + I02 · Z02}
V03 = V21 + {I21 ・ Z21 + I12 ・ (ZT2 + Z12) + I03 ・ Z03}
V04 = V21 + {I21 · Z21 + I12 · (ZT2 + Z12) + I04 · Z04}

  Since the direction of the tidal current reverses day and night, the voltage rises during the day and drops at night. If each consumer has substantially the same current, the voltage rise and fall increase as the impedance of the pole transformer and the line increases.

  Here, FIG. 8 (a) shows a daily change image in the secondary side voltage or the secondary load center point voltage of the automatic voltage regulator 20, and the daily change in the customer connection point voltages V01 to V04. An image is shown in FIG. The automatic voltage regulator 20 monitors the load center point voltage corrected by the secondary side voltage or the line voltage drop compensator, and performs tap switching so that the voltage falls within a pre-registered appropriate voltage range. For this reason, as shown to Fig.8 (a), the secondary side voltage of the automatic voltage regulator 20 or the load side center point voltage of the secondary side is settled in the appropriate voltage range. However, the voltage fluctuation becomes large at the interconnection point voltage of the customer A having the largest line impedance. For this reason, the case where the customer A deviates from the appropriate voltage range may occur.

  Thus, since the fluctuation of the monitoring voltage is smaller than the cooperation point voltage in the consumer, it falls within the appropriate voltage range, and the consumer connection point voltage deviates from the appropriate voltage range. Therefore, a situation where the voltage is not adjusted occurs. In this case, the customer A suffers a loss because the power conditioner suppresses the output in spite of the power generation output peak time zone, and the amount of power sold is reduced compared to other consumers. Unfairness will occur.

  In order to solve the above problems, the present invention provides a voltage adjustment device and a voltage adjustment method for appropriately adjusting a connection point voltage of a consumer in a distribution line interconnected with a plurality of consumers having power generation facilities. It is to provide.

In order to solve the above problems, the inventions according to claims 1 and 3 store the line information of the distribution lines connected to a plurality of consumers having power generation facilities, and are connected to the power generation facilities of each consumer. A voltage adjusting device, wherein the voltage adjusting device collects measurement information about a connection point voltage for each power generation facility of each consumer connected to the distribution line, and the measurement information and the line information. Based on the above, the means for calculating the secondary side voltage so that the interconnection point voltage of each consumer is within a predetermined appropriate voltage range, and the output voltage is adjusted based on the calculated secondary side voltage Ru and means for.

In particular, the invention described in claim 1 further stores priority information that records information for specifying the priority for each demand house interconnection point voltage of each customer is within the proper voltage range The priority order information is used to identify the priority order of each consumer, and the connection point voltage of the consumer with a higher priority order is within the appropriate voltage range. The gist is to calculate the voltage.
In particular, the invention according to claim 3 is installed at a relay point to a consumer based on the line information when detecting a connection point voltage that does not fall within the appropriate voltage range in the measurement information. The gist is to specify a transformer and transmit a voltage adjustment instruction to the transformer so that the interconnection point voltage of each consumer is within the voltage range.

According to a second aspect of the invention, updating the voltage regulator of claim 1, for the demand interconnection point voltage does not fall within the proper voltage range at home, the priority information so as to increase the priority The gist is to do.

  According to a fourth aspect of the present invention, in the voltage regulator according to any one of the first to third aspects, the measurement information on the reverse power flow rate and the power factor is further collected for each power generation facility of each consumer. Using the line information to the consumer and the measurement information, the gist is to perform the change prediction of the interconnection point voltage in each consumer and calculate the secondary side voltage based on the change prediction.

  According to a fifth aspect of the present invention, in the voltage regulator according to any one of the first to fourth aspects, the power generation facility is a facility that generates power using natural energy, and predicts a change in the natural energy. The gist is to perform a change prediction of the interconnection point voltage based on the change prediction, and calculate a secondary side voltage based on the change prediction.

Invention of Claim 6 and 7 memorize | stored the track | line information of the distribution line linked with several consumers which have power generation equipment, and using the voltage regulator connected to the power generation equipment of each consumer, A method of adjusting an output voltage of a voltage regulator, wherein the voltage regulator collects measurement information about a connection point voltage for each power generation facility of each consumer connected to the distribution line; Based on the measurement information and the line information, a step of calculating a secondary side voltage so that the interconnection point voltage of each consumer is within a predetermined appropriate voltage range, and the calculated secondary side voltage to run and adjusting the output voltage based.
In particular, the invention according to claim 6 further stores priority information in which information for specifying the priority for each consumer is recorded, and the interconnection point voltage of each consumer is within the appropriate voltage range. If not, the priority order information is used to identify the priority order of each consumer, and the secondary voltage is set so that the interconnection point voltage of the consumer with the higher priority order is within the appropriate voltage range. The gist is to calculate.
In particular, the invention according to claim 7, in the measurement information, when detecting a connection point voltage that does not fall within the appropriate voltage range, based on the line information, a transformer installed at a relay point to the consumer The gist of the invention is to specify a voltage regulator and transmit a voltage adjustment instruction to the transformer so that the interconnection point voltage of each consumer is within the voltage range.

(Function)
According to invention of Claim 1, 3 , 6 , 7 , since the secondary side voltage calculated based on the measurement information about the connection point voltage for every power generation equipment of a consumer is output, each demand The output voltage can be adjusted so that the house interconnection voltage is within the appropriate voltage range. For example, by setting the appropriate voltage range to a range where the output of the power generation facility is not limited, each consumer can sell power accurately.

According to the first and sixth aspects of the invention, since the secondary side voltage is adjusted based on the priority information, the output voltage can be adjusted in consideration of the situation of each consumer.
According to the second aspect of the present invention, since the priority is updated by adjusting the output voltage, the unfairness of each consumer can be corrected.
According to invention of Claim 3, 7, voltage adjustment can be performed with the transformer installed on the track | line to a consumer. That is, in the transformer on the line, since the number of power generation facilities connected to each other is small, it is possible to optimize the connection point voltage by partial voltage adjustment.

According to the fourth aspect of the present invention, it is possible to predict the change of the connection point voltage by using the reverse power flow rate and the power factor, and to appropriately adjust the output voltage according to the prediction.
According to the fifth aspect of the present invention, since natural energy changes depending on the time and season, the output voltage can be adjusted so that the interconnection point voltage is within the appropriate voltage range in consideration of this change.

  INDUSTRIAL APPLICABILITY The present invention can provide a voltage adjustment device and a voltage adjustment method for appropriately adjusting a connection point voltage of a consumer in a distribution line interconnected with a plurality of consumers having power generation facilities. In addition, it is possible to eliminate electric power sales hindrance due to suppression of power generation output and unfair power selling between consumers, and to eliminate financial damage and dissatisfaction of consumers.

1 is a system schematic diagram of a first embodiment of the present invention. It is explanatory drawing of the voltage change of embodiment of this invention, Comprising: (a) is the secondary side voltage or secondary side load center point voltage of an automatic voltage regulator, (b) is a connection point voltage of each consumer. FIG. Explanatory drawing of the process sequence of the 1st Embodiment of this invention. Explanatory drawing of the process sequence of the 2nd Embodiment of this invention. Explanatory drawing of the process sequence of the 3rd Embodiment of this invention. Explanatory drawing of the process sequence of the 4th Embodiment of this invention. Explanatory drawing of the track | line of the transmission / distribution electric wire connected to the electric power generating apparatus of a some consumer. It is explanatory drawing of the conventional voltage change, Comprising: (a) is the secondary side voltage or secondary side load center point voltage of an automatic voltage regulator, (b) is explanatory drawing of the connection point voltage of each consumer.

(First embodiment)
Hereinafter, an embodiment of a voltage adjusting device and a voltage adjusting method embodying the present invention will be described with reference to FIGS. In this embodiment, the connection point voltage of the power generator 10 of each customer (A to D) is measured, and the automatic voltage regulator 20 adjusts the output voltage.

  The power generation device 10 is a power generation facility installed in each consumer (A to D). In the present embodiment, power generation equipment using sunlight as natural energy is used. A power conditioner is connected to the power generator 10. This power conditioner supplies the power generation output to the distribution line when the interconnection point voltage is within the appropriate voltage range, and suppresses the power generation output when the interconnection point voltage exceeds the upper limit value of the appropriate voltage range. .

  The monitoring apparatus 11 measures the connection point voltage of the power generator 10 of each consumer (A to D). The monitoring device 11 is connected to the automatic voltage regulator 20 via a communication network. And the monitoring apparatus 11 transmits regularly the measurement information including the information regarding a connection point voltage with respect to the automatic voltage regulator 20. FIG. The measurement information further includes information related to a customer code for specifying the customer. As the monitoring device 11, for example, a watt hour meter called a smart meter can be used.

  The automatic voltage regulator 20 converts the primary voltage from the power plant into a secondary voltage supplied to the consumer. As shown in FIG. 1, the automatic voltage regulator 20 includes a control unit 21, a tap changer 22, a communication unit 23, a measurement information storage unit 24, a line information storage unit 25, and a priority order storage unit 26.

  The control part 21 adjusts the secondary side voltage supplied to the distribution line connected to the power generator 10 of each consumer. The control unit 21 includes a CPU, a RAM, a ROM, and the like as control means, each of which will be described later (measurement information collection stage, interconnection point voltage management stage, secondary side voltage adjustment stage, priority order management stage, etc. Process). By executing the voltage control program for this purpose, the control unit 21 functions as a measurement information collection unit, a connection point voltage management unit, a secondary side voltage adjustment unit, a priority order management unit, and the like.

  The measurement information collecting means executes a process of acquiring measurement information of the power generation device 10 from the monitoring device 11 of each customer connected to the automatic voltage regulator 20. In this embodiment, a connection point voltage is acquired as measurement information.

  The connection point voltage management means compares the connection point voltage with an appropriate voltage range, and executes processing for determining whether or not voltage adjustment is necessary. Further, the connection point voltage management means executes a process of calculating the number of switching taps for keeping the connection point voltage within an appropriate voltage range. Here, the predicted value of the interconnection point voltage of each consumer when tap switching is performed is calculated using the line information and impedance information recorded in the line information storage unit 25. For this reason, the relational expression of the interconnection point voltage, the impedance, and the power flow shown in (Equation 1) is held.

The secondary side voltage adjusting means executes a process of instructing tap switching based on a comparison result between the interconnection point voltage and the appropriate voltage range.
When adjusting the secondary side voltage, the priority order management means executes a process for managing the priority order in which the connection point voltage of the consumer falls within the appropriate voltage range. Specifically, the priority storage unit 26 performs adjustment so that the customer's interconnection point voltage falls within the appropriate voltage range in the order of higher priority. Moreover, the process which raises the priority of the consumer who could not adjust a connection point voltage to an appropriate voltage range is performed after voltage adjustment.

The tap changer 22 executes a process of switching the tap of the transformer that converts the primary voltage into the secondary voltage. By this tap switching, the secondary side voltage is changed according to the number of taps.
The communication unit 23 executes a process of receiving measurement information from each monitoring device 11 via the communication network.

  In the measurement information storage unit 24, a measurement information management record about the measurement information (interconnection point voltage) of the power generator 10 of each consumer is recorded. This measurement information management record is recorded when new measurement information is acquired from each monitoring device 11. In this measurement information management record, data related to the customer code, the reception time, and the connection point voltage are recorded.

In the customer code data area, identification information for identifying a customer connected to the automatic voltage regulator 20 is recorded.
In the reception time data area, data related to the date and time when the measurement information is acquired is recorded.
In the interconnection point voltage data area, data relating to the interconnection point voltage of the power generation device 10 of the consumer is recorded.

  In the line information storage unit 25, a line management file (line information) up to the power generation apparatus 10 connected to the automatic voltage regulator 20 is recorded. This line management file is recorded when the line information up to the power generation apparatus 10 connected to the automatic voltage regulator 20 and the measurement of the impedance of each line and the pole transformer are registered. In this track management file, data related to impedances in the track diagrams, the low-voltage lines and the lead-in transformers, etc., to the power generation apparatus 10 of each customer, and the like are recorded.

  The priority storage unit 26 stores a priority management record (priority information) related to the priority when voltage control is performed for each consumer connected to the automatic voltage regulator 20. This priority management record is updated and recorded when voltage adjustment is performed. In this priority management record, data relating to customer codes and rank evaluation points are recorded.

In the customer code data area, identification information for identifying a customer connected to the automatic voltage regulator 20 is recorded.
In the rank evaluation point data area, rank evaluation points for specifying the priority order of the consumers are recorded. It is determined that the higher the rank evaluation score is, the higher the priority is.

Next, a process for adjusting the interconnection point voltage using the automatic voltage regulator 20 described above will be described with reference to FIG.
First, the control unit 21 of the automatic voltage regulator 20 executes measurement information collection processing (step S101). Specifically, the measurement information collection means of the control unit 21 acquires measurement information from the monitoring device 11 of each customer. The measurement information includes information related to the customer code of the customer where the monitoring device 11 is installed and the interconnection voltage of the power generation device 10. Then, the control unit 21 records the reception time and the interconnection point voltage in the measurement information storage unit 24 in association with the customer code.

  Next, the control part 21 of the automatic voltage regulator 20 performs the determination process about whether it is in an appropriate voltage range (step S102). Specifically, the connection point voltage management means of the control unit 21 compares the connection point voltage recorded in the measurement information storage unit 24 with the appropriate voltage range registered in advance, and connects each customer's connection. Determine whether the system point voltage is within the appropriate voltage range.

  When all the interconnection point voltages are within the appropriate voltage range (in the case of “YES” in step S102), the control unit 21 of the automatic voltage regulator 20 returns to the measurement information collection process (step S101).

  On the other hand, when a connection point voltage not included in the appropriate voltage range is detected (in the case of “NO” in step S102), the control unit 21 of the automatic voltage regulator 20 brings all the connection point voltages into the appropriate voltage range. The search process of the secondary side voltage that can be accommodated is executed (step S103). Specifically, the control unit 21 calculates a predicted value of the interconnection point voltage at the consumer when tap switching is performed. For this calculation, the line impedance recorded in the line information storage unit 25 is used.

  For example, assuming that the deviation voltage width of the consumer is [+ 2V], when the transformation ratio of the pole transformer is [6600V / 105V], the step-down necessary width of the automatic voltage regulator 20 is obtained by the following calculation.

(Equation 2)
2 x 6600/105 = 125.7V
It is assumed that the automatic voltage regulator 20 performs a step-down operation with the number of switching taps so that the adjustment width is larger than this voltage.

  Furthermore, the control part 21 specifies the connection point voltage of another consumer in the measurement information storage part 24, and acquires the impedance information in the line to each consumer using the line information storage part 25. And the control part 21 calculates the predicted value of the connection point voltage about the other consumer by this step-down by a relational expression using the present connection point voltage and impedance information.

  Next, the control unit 21 of the automatic voltage regulator 20 performs a determination process as to whether or not there is a secondary side voltage in which all the connection point voltages are within the appropriate voltage range (step S104). Specifically, the control unit 21 determines whether or not the predicted value is included in the appropriate voltage range by comparing the predicted value of each interconnection point voltage with the appropriate voltage range. That is, it is confirmed whether the interconnection point voltage of another customer does not deviate from the appropriate voltage range.

When there is a secondary side voltage that can keep all the interconnection point voltages within the appropriate voltage range (in the case of “YES” in step S104), the control unit 21 of the automatic voltage regulator 20 executes the voltage adjustment process. (Step S105). Specifically, the secondary side voltage adjusting means of the control unit 21 instructs the tap changer 22 to switch taps. Thereby, the secondary side voltage of the automatic voltage regulator 20 is changed. In this case, as shown in FIG. 2A, the secondary side voltage or the secondary load center point voltage of the automatic voltage regulator 20 is within the appropriate voltage range. In addition, as shown in FIG. 2B, the connection point voltage of each consumer is also within the appropriate voltage range by tap switching.
And the control part 21 of the automatic voltage regulator 20 returns to the collection process (step S101) of measurement information.

  On the other hand, when there is no secondary side voltage that falls within the appropriate voltage range (in the case of “NO” in step S104), the control unit 21 of the automatic voltage regulator 20 executes the specifying process of the consumer with the highest priority ( Step S106). Specifically, the priority order management means of the control unit 21 specifies the highest rank evaluation point in the priority order storage unit 26 and specifies the customer code associated with this rank evaluation point.

  Next, the control part 21 of the automatic voltage regulator 20 performs the search process of the secondary side voltage in which the connection point voltage of all the specified consumers is settled in an appropriate voltage range (step S107). Specifically, the control unit 21 specifies the connection point voltage of the specified consumer with high priority, and acquires the impedance information on the line to each customer using the line information storage unit 25. And the control part 21 calculates the predicted value of the connection point voltage of each consumer by tap maintenance or tap switching with a relational expression using the present connection point voltage and impedance information.

  Next, the control part 21 of the automatic voltage regulator 20 performs the determination process about whether there exists a secondary side voltage which does not fit in an appropriate voltage range (step S108). Specifically, the control unit 21 determines whether or not the predicted value is included in the appropriate voltage range by comparing the calculated predicted value of each interconnection point voltage with the appropriate voltage range.

When there is a secondary side voltage in which the predicted value of the connection point voltage of the customer specified based on the priority order is within the appropriate voltage range (in the case of “NO” in step S108), the control unit 21 of the automatic voltage regulator 20 Performs the process of identifying the next-ranked consumer (step S109). Specifically, the control unit 21 specifies the customer code associated with the next highest rank evaluation score in the priority order storage unit 26.
And the control part 21 of the automatic voltage regulator 20 returns to the search process (step S107) of the secondary side voltage in which the interconnection point voltage of all the specified consumers is settled in an appropriate voltage range.

  On the other hand, when the predicted value of the interconnection point voltage that does not fall within the appropriate voltage range is detected (in the case of “YES” in step S108), the control unit 21 of the automatic voltage regulator 20 detects the consumer that does not fall within the appropriate voltage range. Except for this, the voltage adjustment processing is executed (step S110). Specifically, the control unit 21 specifies the number of tap switchings in which the predicted values of all other connection point voltages fall within the appropriate voltage range, except for the consumer specified last. Then, the control unit 21 instructs the tap switch 22 to perform a tap switching instruction regarding this tap switching number.

  Next, the control part 21 of the automatic voltage regulator 20 performs the update process of a customer's priority (step S111). Specifically, the control unit 21 specifies a consumer whose predicted value of the interconnection point voltage deviates from an appropriate voltage range in tap switching. And the control part 21 specifies the consumer from whom the predicted value of a connection point voltage has deviated from the appropriate voltage range. And the control part 21 performs the setting which raises a priority in the priority order memory | storage part 26 by adding "1" to the rank evaluation score of the consumer code of the identified consumer. In addition, the method of raising the rank of the consumer who has deviated from the appropriate voltage range is not limited to this.

According to the voltage regulator of the above embodiment, the following effects can be obtained.
(1) In the above embodiment, the line information storage unit 25 records the line management file up to the power generation apparatus 10 connected to the automatic voltage regulator 20. And the control part 21 of the automatic voltage regulator 20 performs the collection process of measurement information (step S101). Further, the control unit 21 of the automatic voltage regulator 20 executes a secondary voltage search process capable of keeping all interconnection point voltages within an appropriate voltage range (step S103). Since the automatic voltage regulator 20 acquires the connection point voltage of each consumer, tap switching for changing the secondary side voltage in consideration of this voltage can be performed. In this case, since the line impedance of the low voltage line and the lead-in line recorded in the line information storage unit 25 is taken into consideration, the connection point voltage corresponding to the line configuration and the impedance distribution can be predicted more accurately. Tap switching can be performed in accordance with.

  (2) In the above embodiment, the priority order storage unit 26 stores a priority order management record related to the priority order when voltage control is performed for each consumer connected to the automatic voltage regulator 20. And the control part 21 of the automatic voltage regulator 20 performs the search process of the secondary side voltage in which the connection point voltage of all the consumers specified in the order of priority falls in an appropriate voltage range (step S107). Thereby, tap switching can be performed based on the rank evaluation points recorded in the priority rank storage unit 26. Here, since a high evaluation point is given to a customer whose interconnection point voltage does not fall within the appropriate voltage range, the priority in the voltage adjustment after the next time can be set high. Therefore, it is possible to correct the unfairness by averaging the number of times that the connection point voltage of each customer deviates from the appropriate voltage range.

(Second Embodiment)
Next, a second embodiment of the voltage regulator embodying the present invention will be described with reference to FIG. In the said 1st Embodiment, the voltage adjustment of a secondary side voltage is performed based on the connection point voltage of each consumer. In the second embodiment, the connection point voltage is predicted to be predicted using the tidal flow rate and the power factor in addition to the measurement information (connection point voltage) of the first embodiment. Here, detailed description of the same parts as those in the first embodiment is omitted. In this embodiment, the monitoring device 11 collects the tidal flow rate and power factor information at the connection point in addition to the connection point voltage of the consumer and transmits it to the automatic voltage regulator 20. Then, the automatic voltage regulator 20 uses the line information recorded in the line information storage unit 25 to predict an increase / decrease in the connection point voltage from the tide flow rate / power factor of each consumer.

  Here, first, the control unit 21 of the automatic voltage regulator 20 executes measurement information collection processing (step S201). Specifically, the control unit 21 collects measurement information about the interconnection point voltage, the tidal flow rate, and the power factor from the monitoring device 11 of each consumer. The control unit 21 records the acquired information in the measurement information storage unit 24 in association with the customer code and the reception time.

  Next, the control part 21 of the automatic voltage regulator 20 performs the prediction process of the rise / fall of a connection point voltage (step S202). Specifically, the control unit 21 calculates the predicted value of the future connection point voltage using the acquired connection point voltage, power flow rate, and power factor, thereby increasing or decreasing the connection point voltage. Predict.

  Next, the control part 21 of the automatic voltage regulator 20 performs the determination process about whether an expected value is in an appropriate voltage range (step S203). Specifically, the control unit 21 compares the current interconnection point voltage and the calculated predicted value with the appropriate voltage range, and determines whether or not the predicted value is included in the appropriate voltage range.

  When all the predicted values are included in the appropriate voltage range (in the case of “YES” in step S203), the control unit 21 of the automatic voltage regulator 20 returns to the measurement information collection process (step S201).

  On the other hand, when a predicted value not included in the appropriate voltage range is detected (in the case of “NO” in step S203), the control unit 21 of the automatic voltage regulator 20 determines all the connection point voltages as in step S103. A search process for the secondary voltage that can be within the proper voltage range is executed (step S204).

  Then, similarly to steps S104 to S111, the control unit 21 of the automatic voltage regulator 20 determines whether there is a secondary side voltage in which all the connection point voltages fall within the appropriate voltage range (step S205) to An update process of the priority order of the customer (step S212) is executed.

According to the voltage regulator of the above embodiment, the following effects can be obtained.
(3) In the said embodiment, the control part 21 of the automatic voltage regulator 20 performs the collection process of the measurement information about a connection point voltage, a tidal flow, and a power factor (step S201). And the control part 21 of the automatic voltage regulator 20 performs the prediction process of the rise / fall of a connection point voltage (step S202). Thereby, based on the prediction of the voltage rise and fall by the change of the tidal flow and the power factor, it is possible to predict the future change of the connection point voltage. Further, accurate voltage control can be realized in consideration of the predicted value of the interconnection point voltage, and the possibility of deviation from the appropriate voltage range can be further reduced. For example, it is possible to perform voltage control in anticipation of a voltage increase due to an increase in power flow for the surplus power as a margin in advance.

(Third embodiment)
Next, a third embodiment of the voltage regulator embodying the present invention will be described with reference to FIG. In the second embodiment, the connection point voltage is predicted using the connection point voltage, tidal flow rate, and power factor of each consumer. In 3rd Embodiment, in addition to the prediction method of 2nd Embodiment, the photovoltaic power generation capacity | capacitance and photovoltaic power generation output information were collected, and the automatic voltage regulator 20 changed so that output surplus power might be evaluated. It is. Here, detailed description of the same parts as those of the third embodiment is omitted.

  In this embodiment, the control part 21 of the automatic voltage regulator 20 is connected to a weather information provision server via networks, such as the internet. Further, the automatic voltage regulator 20 is provided with a customer information storage unit that records information for specifying the area where each power generation device 10 is installed in association with the customer code.

  Further, the automatic voltage regulator 20 stores a sunlight amount table and a weather correction table. In the sunlight amount table, a temporal change in the amount of sunlight is recorded for each date. For example, assuming that the amount of sunlight at the reference time (noon) is “1”, the ratio of the amount of sunlight at each time is recorded.

  In the weather correction table, a correction value for the amount of sunlight is recorded in association with the weather information provided by the weather information providing server. For example, assuming that the amount of sunlight in the reference weather (fine weather) is “1”, the ratio of the amount of sunlight in each weather (rainy weather, cloudy weather, etc.) is recorded.

  And the control part 21 of the automatic voltage regulator 20 performs the collection process (step S301) of a measurement information, and the prediction process (step S302) of the rise / fall of a connection point voltage similarly to step S201, S202.

  Next, the control part 21 of the automatic voltage regulator 20 performs the sunlight amount prediction process (step S303). Specifically, the control unit 21 acquires the current date and time from the built-in timer. Further, the control unit 21 accesses the weather information providing server and acquires the weather information of the area where each power generation device 10 is installed. And the control part 21 estimates the increase / decrease rate of the light quantity in predetermined time from the present date and time using a sunlight amount table. Furthermore, the control unit 21 acquires a correction value from the weather correction table based on the weather information. And the control part 21 estimates the change of sunlight amount using an increase / decrease rate and a correction value.

  Next, the control part 21 of the automatic voltage regulator 20 performs the correction process of a predicted value (step S304). Specifically, the control unit 21 corrects the predicted value of the interconnection point voltage calculated in step S302 according to the predicted change in the amount of sunlight.

  Then, similarly to steps S203 to S112, the control unit 21 of the automatic voltage regulator 20 determines whether the predicted value is within the appropriate voltage range (step S305) to update the priority order of the customer (step S314). ).

According to the voltage regulator of the above embodiment, the following effects can be obtained.
(4) In the said embodiment, the control part 21 of the automatic voltage regulator 20 performs the prediction process (step S303) of sunlight amount, and the correction process (step S304) of a predicted value. Thereby, in addition to changes in tidal flow and power factor, future changes in interconnection point voltage can be predicted based on predictions of voltage rise and fall in consideration of changes in the amount of sunlight. Further, accurate voltage control can be realized in consideration of the predicted value of the interconnection point voltage, and the possibility of deviation from the appropriate voltage range can be further reduced.

(Fourth embodiment)
Next, a fourth embodiment of the voltage regulator embodying the present invention will be described with reference to FIG. In the said 1st Embodiment, the secondary side voltage was adjusted using the priority order so that a consumer's interconnection point voltage might be settled in an appropriate voltage range. In the fourth embodiment, in addition to adjusting the secondary side voltage in the automatic voltage regulator 20 of the first embodiment, voltage adjustment is attempted using a pole transformer provided on the line of the distribution line. The configuration is changed to Detailed description of the same parts as those in the first embodiment will be omitted.

  Here, the control part 21 of the automatic voltage regulator 20 performs measurement information collection processing (step S401) to voltage adjustment processing (step S405) in the same manner as steps S101 to S105.

  And when there is no secondary side voltage which fits into an appropriate voltage range (in the case of "NO" in Step S404), control part 21 of automatic voltage regulator 20 is a pillar on a line to a consumer who does not fit in an appropriate voltage range. An upper transformer specifying process is executed (step S406). Specifically, the control unit 21 uses the line information storage unit 25 to specify a line to a customer whose interconnection point voltage is not included in the appropriate voltage range. And the control part 21 specifies the pole transformer installed on this track | line.

  Next, the control part 21 of the automatic voltage regulator 20 performs the adjustment process of a pole transformer (step S407). Specifically, the control unit 21 instructs the specified pole transformer to adjust the voltage so that the interconnection point voltage is within an appropriate voltage range. In this case, it is instructed so that the connection point voltage of the other power generation apparatus 10 connected to the pole transformer does not deviate from the appropriate voltage range.

  Next, the control part 21 of the automatic voltage regulator 20 performs the determination process about whether it was able to adjust with the pole transformer (step S408). Specifically, the control unit 21 adjusts the voltage of the pole transformer, and compares the connection point voltage of all customers connected to the pole transformer with the appropriate voltage range to obtain the appropriate voltage. Check if it is within range.

When adjustment has been made by the pole transformer (“YES” in step S408), the control unit 21 of the automatic voltage regulator 20 returns to the measurement information collection process (step S401).
On the other hand, when it is determined that the adjustment has not been possible with the pole transformer (in the case of “NO” in step S408), the control unit 21 of the automatic voltage regulator 20 has a high-priority demand as in steps S106 to S111. House identification processing (step S409) to consumer priority update processing (step S414) are executed.

According to the voltage regulator of the above embodiment, the following effects can be obtained.
(5) In the said embodiment, the control part 21 of the automatic voltage regulator 20 specifies the process (step S406) of the pole transformer of the transmission line from the consumer who does not fit in an appropriate voltage range, adjustment of a pole transformer A process (step S407) is executed. Thereby, since the number of consumers connected to the pole transformer is limited more than the number of consumers connected to the automatic voltage regulator 20, it is efficiently connected within a limited area. The point voltage can be adjusted.

In addition, you may change the said embodiment as follows.
In each of the above embodiments, the automatic voltage regulator 20 is used as the voltage regulator. However, the present invention is not limited to this, and can be applied to a device that performs automatic voltage regulation on a distribution line. For example, the present invention can be applied to a pole transformer with a tap changer having an automatic voltage adjustment function, a shunt reactor, a static var compensator (SVC), and the like.

  In each of the above embodiments, solar power generation is assumed as the power generation apparatus 10, but the power generation method is not limited to this, and can be applied to power generation using natural energy such as wind power.

  In each of the above embodiments, the secondary side voltage is adjusted so that the connection point voltage of the consumer having the power generation device 10 is within the appropriate voltage range. In addition to this, it is also possible to confirm whether or not the connection point voltage of the customer who does not have the power generation device 10 is within the appropriate voltage range.

  In the first embodiment, a process for searching for the secondary side voltage capable of keeping all interconnection point voltages within the appropriate voltage range is executed (step S103). Instead, when tap switching is performed, it may be confirmed whether or not the lowest interconnection point voltage is within the appropriate voltage range. In this case, the control unit 21 specifies the customer code of the customer having the lowest interconnection point voltage in the measurement information storage unit 24. Next, the control part 21 acquires the impedance information in the line to this consumer using the line information memory | storage part 25. FIG. And the control part 21 confirms whether the consumer of the lowest connection point voltage does not fall below an appropriate voltage range lower limit by this voltage reduction.

  In the above embodiment, the control unit 21 of the automatic voltage regulator 20 collects measurement information from the monitoring device 11 of each consumer. When the number of consumers is large, the number of data increases and the calculation becomes complicated. Then, you may make it acquire measurement information from the power distribution equipment on the track to a consumer. For example, the pole transformer collects secondary side situation information (statistics of interconnection point voltage) and transmits it to the automatic voltage regulator 20 as measurement information. Then, the automatic voltage regulator 20 performs tap switching so that the secondary voltage of the pole transformer is within the appropriate voltage range.

  DESCRIPTION OF SYMBOLS 10 ... Electric power generation apparatus, 11 ... Monitoring apparatus, 20 ... Automatic voltage regulator, 21 ... Control part, 22 ... Tap changer, 23 ... Communication part, 24 ... Measurement information storage part, 25 ... Line information storage part, 26 ... Priority Rank storage unit.

Claims (7)

A voltage regulating device that stores line information of distribution lines interconnected with a plurality of consumers having power generation facilities and connected to the power generation facilities of each consumer,
The voltage regulator is
Means for collecting measurement information about the interconnection voltage for each power generation facility of each consumer connected to the distribution line;
Based on the measurement information and the line information, means for calculating the secondary side voltage so that the interconnection point voltage of each consumer is within a predetermined appropriate voltage range;
Means for adjusting an output voltage based on the calculated secondary voltage ,
Further storing priority information that records information for specifying the priority for each customer,
When the connection point voltage of each consumer does not fall within the appropriate voltage range, the priority order information is used to identify the priority order of each consumer, and the connection point of the consumer with a high priority order A voltage regulator that calculates a secondary voltage so that a voltage is within the appropriate voltage range . 2. The voltage regulator according to claim 1 , wherein the priority order information is updated so as to increase the priority order for a consumer whose interconnection point voltage does not fall within the appropriate voltage range. A voltage regulating device that stores line information of distribution lines interconnected with a plurality of consumers having power generation facilities and connected to the power generation facilities of each consumer,
The voltage regulator is
Means for collecting measurement information about the interconnection voltage for each power generation facility of each consumer connected to the distribution line;
Based on the measurement information and the line information, means for calculating the secondary side voltage so that the interconnection point voltage of each consumer is within a predetermined appropriate voltage range;
Means for adjusting the output voltage based on the calculated secondary voltage;
With
In the measurement information, when detecting a connection point voltage that does not fall within the appropriate voltage range, based on the line information, identify a transformer installed at a relay point to the consumer,
The relative transformer, as interconnection point voltage of each customer is within the voltage range, to that voltage adjustment device and transmits the voltage adjustment instruction. For each power generation facility of each consumer, further collect measurement information on reverse tide flow rate and power factor,
Using the line information to the consumer and the measurement information, predict the change of the interconnection voltage in each consumer,
The voltage regulator according to claim 1, wherein a secondary side voltage is calculated based on the change prediction. The power generation facility is a facility for generating power using natural energy,
5. The change of the natural energy is predicted, the change of the connection point voltage is predicted based on the change prediction, and the secondary side voltage is calculated based on the change prediction. The voltage regulator as described in any one. In the method of storing the line information of the distribution lines interconnected with a plurality of consumers having a power generation facility, and adjusting the output voltage of the voltage regulator using a voltage regulator connected to the power generation facility of each consumer There,
The voltage regulator is
For each customer's power generation equipment connected to the distribution line, collecting measurement information about the interconnection point voltage;
Based on the measurement information and the line information, calculating the secondary side voltage so that the interconnection point voltage of each consumer is within a predetermined appropriate voltage range;
Adjusting the output voltage based on the calculated secondary voltage ,
Further storing priority information that records information for specifying the priority for each customer,
When the connection point voltage of each consumer does not fall within the appropriate voltage range, the priority order information is used to identify the priority order of each consumer, and the connection point of the consumer with a high priority order A voltage adjustment method comprising calculating a secondary voltage so that a voltage is within the appropriate voltage range .   In the method of storing the line information of the distribution lines interconnected with a plurality of consumers having a power generation facility, and adjusting the output voltage of the voltage regulator using a voltage regulator connected to the power generation facility of each consumer There,
  The voltage regulator is
  For each customer's power generation equipment connected to the distribution line, collecting measurement information about the interconnection point voltage;
  Based on the measurement information and the line information, calculating the secondary side voltage so that the interconnection point voltage of each consumer is within a predetermined appropriate voltage range;
  Adjusting the output voltage based on the calculated secondary voltage;
Run
  In the measurement information, when detecting a connection point voltage that does not fall within the appropriate voltage range, based on the line information, identify a transformer installed at a relay point to the consumer,
  A voltage adjustment method, wherein a voltage adjustment instruction is transmitted to the transformer so that a connection point voltage of each consumer is within the voltage range.

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