JP2017063584A - Partial supply support demand controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a partial supply support demand controller capable of controlling to confine the demand power within contract power, even in a power receiving form where partial supply is performed.SOLUTION: For a time zone where there are a plurality of partial supply contract powers A, B in the same time zone, a target power setting unit 8 sets a target power W2 based on the sum (A+B) of the plurality of partial supply contract powers A, B. A target current power W3 is calculated by a target current power calculation unit 9 with the target power W2, thus set, as the final value, and then compared with the current power W1 by a power comparison unit 11. When the current power W1 goes above the target current power W3, as a result of comparison, and if it is predicted that the prediction power W4 exceeds the target power W2 at the finish time tE of a demand time limit T, a demand control unit 12 controls an alarm output unit 13 to issue an alarm. Furthermore, a load interruption unit 14 is controlled to interrupt the load, and to adjust the prediction power W4 within the target power W2.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a demand control device that performs control so that demand power (demand), which is power used in a demand period, does not exceed contract power.

  Conventionally, as this type of demand control device, for example, there is one disclosed in Patent Document 1. In general, the demand control device constantly monitors the demand power and issues a warning so that the demand power does not exceed the target power value set based on the contract power, for example, 95% of the contract power. Automatically control the load. When an alarm is issued by the demand control device, the power consumer manually stops energization to the load device that can be stopped. In addition, when the load amount is automatically controlled, the demand control device automatically stops energization from the load device that has been set with a priority in advance, and automatically loads after a certain period of time. Restore power to the equipment.

Japanese Patent No. 2676714

  Many electric power consumers contract with one electric power company and receive electricity. However, currently, a form of power reception called “partial supply” in which a contract is made with a plurality of electric power companies and electric power is received from each electric power company is also recognized. Partial supply refers to “a form in which each generated electricity is supplied as a unit through one pull-in without being physically separated from a plurality of electric power supply sources to one demand place”.

  The conventional demand control device as disclosed in Patent Document 1 cannot cope with such a power receiving form in which partial supply is performed, and performs control so that the demand power falls within the contract power. I can not.

The present invention has been made to solve such problems,
Based on the power consumption information input from the power measurement unit, a current power calculation unit that calculates the integrated value of power used from the start of the demand time period to the present as the current power, and used by the end time of the demand time period A target power set based on the contracted power as the upper limit value of the power usage integrated value at the end time of the demand time limit A target current power calculation unit that calculates an ideal integrated value of power used that increases in proportion to the elapsed time within the demand time period as a final value, and a power comparison unit that compares the current power with the target current power When the current comparison result in the power comparison unit exceeds the target current power and the predicted power is predicted to exceed the target power at the end time of the demand time period, an alarm is issued. , Or in a demand control apparatus and a demand control unit for performing control to adjust within a target power predicted power loads and interrupted by a predetermined method,
A target power setting unit that sets a target power based on the total of a plurality of partial supply contract powers for a time zone in which there are a plurality of partial supply contract powers in the same time zone,
The target current power calculation unit calculates the target current power using the target power set by the target power setting unit as a final value.

  According to this configuration, the target power is set by the target power setting unit based on the sum of the plurality of partial supply contract powers for a time slot in which there are a plurality of partial supply contract powers in the same time zone. The target current power, which is an ideal integrated value of the power used, is calculated by the target current power calculation unit with the set target power as a final value, and is compared with the current power by the power comparison unit. As a result of the comparison, if the current power is greater than or equal to the target current power and the predicted power is predicted to exceed the target power at the end time of the demand time period, an alarm is issued by the demand control unit or the load is set to a predetermined method. Is controlled so that the predicted power is adjusted within the target power. For this reason, it is possible to provide a partial supply-compatible demand control device capable of controlling the power demand within the contract power for the power receiving mode in which partial supply is performed.

The present invention also provides:
The target power setting unit sets the suppression target power as the upper limit value of the power usage integrated value at the end time of the demand period based on the contract power for base supply among the contract power for partial supply contracted in the same time period. Set,
The target current power calculation unit suppresses the ideal integrated value of the used power that increases in proportion to the elapsed time within the demand time period with the suppression target power as the final value for the current power below the contract power for base supply. Calculated as electricity,
The power comparison unit compares the current power with the suppression target current power when the current power is equal to or less than the contract power for base supply, and compares the current power with the target current power when the current power exceeds the contract power for base supply. Compare
The demand control unit issues a second alarm when the current power is equal to or greater than the suppression target current power as a result of the comparison in the power comparison unit, and the predicted power is predicted to exceed the suppression target power at the end time of the demand time period, or the load Is controlled by adjusting the predicted power within the suppression target power.

  According to this configuration, the target power is set by the target power setting unit based on the contract power for base supply out of the contract power for partial supply and the sum of the contract power for multiple partial supply. Is done. In addition, the target current power calculation unit calculates the suppression target current power or the target current power using the set suppression target power or the target power as a final value, and compares it with the current power by the power comparison unit. If the current power is less than or equal to the contract power for base supply, the power comparison unit compares the suppression target current power with the current power, and as a result of this comparison, the current power exceeds the suppression target current power and reaches the end time of the demand time limit. When the predicted power is predicted to exceed the suppression target power, a second alarm is issued by the demand control unit, or the load is cut off by a predetermined method so that the predicted power is adjusted within the suppression target power. Is done. Even if a second alarm is issued by the demand control unit, or the load is cut off by a predetermined method and the predicted power is adjusted to be within the suppression target power, the current power is the base supply contract power. When exceeding, the target current power and the current power are compared by the power comparison unit. As a result of this comparison, when the current power exceeds the target current power and the predicted power is predicted to exceed the target power at the end time of the demand time period, an alarm is issued by the demand control unit or the load is set to a predetermined value. Control is performed in which the predicted power is adjusted within the target power by being cut off by the above method.

  For this reason, the contracted power for the load following supply is higher than the contracted power for the base supply, and it is necessary to cover the power reception only with the contracted power for the base supply with a lower power charge. Among them, the ratio of the contract power for base supply is high, and it is possible to control demand power suitable for the case where it is desired to limit the power reception to one electric power company that performs the contract power for base supply.

  Further, the present invention is characterized in that the suppression target power is set for each same time zone based on each base supply contract power of a plurality of partial supply contract power contracted for a plurality of each same time zone. And

  According to this configuration, when there are a plurality of partial supply contract powers for a plurality of the same time periods, the target power setting unit sets the suppression target power for each of the plurality of the same time periods. Therefore, the suppression target current power is calculated by the target current power calculation unit for each of a plurality of the same time periods, and the calculated suppression target current power and the current power are compared by the power comparison unit. Then, according to the result of the comparison, the demand control unit issues a second alarm, or performs a control in which the load is cut off by a predetermined method and the predicted power is adjusted within the suppression target power.

  Further, the present invention is characterized in that the target power is set for each same time period based on each total of a plurality of partial supply contract powers contracted for a plurality of same time periods.

  According to this configuration, when there are a plurality of partial supply contract powers for a plurality of the same time zones, the target power is set by the target power setting unit for each of the plurality of the same time zones. Therefore, the target current power is calculated by the target current power calculation unit for each of a plurality of the same time periods, and the calculated target current power and the current power are compared by the power comparison unit. Then, according to the result of the comparison, the demand control unit issues an alarm or performs control in which the load is cut off in a predetermined manner and the predicted power is adjusted within the target power.

The present invention also provides:
When the calculated demand power, which is the current power calculated by the current power calculation unit at the end time of the demand time period, is equal to or less than the contract power for base supply among the contract power for partial supply contracted in the same time zone, Demand power for contract power for base supply is calculated as the value of calculated demand power, and the power demand for contract power for follow-up load among multiple contract powers for partial supply is stored as zero. If it exceeds the power, the demand power for the contract power for base supply is the value of the contract power for base supply, and the power demand for the contract power for load following supply is calculated from the calculated demand power value. Demand power discriminating storage unit that stores a value obtained by subtracting
A display unit for displaying the demand power stored for each partial supply contract power by the demand power discrimination storage unit or a transmission unit for transmitting to the outside is provided.

  According to this configuration, when the calculated demand power is less than or equal to the base supply contract power, the demand power for the base supply contract power is the value of the calculated demand power, and the demand power for the load following supply contract power is zero. , Stored in the demand power discrimination storage unit. If the calculated demand power exceeds the contract power for base supply, the power demand for the contract power for base supply is the value of the contract power for base supply, and the power demand for the contract power for follow-up supply is calculated power demand. As a value obtained by subtracting the value of the contract power for base supply from this value, the demand power discrimination storage unit stores the value. The demand power stored for each partial supply contract power by the demand power discrimination storage unit is displayed by the display unit or transmitted to the outside by the transmission unit. For this reason, it becomes possible to know the demand power and its history for each partial supply contract power for a plurality of partial supply contract power contracted in the same time zone.

The present invention also provides:
Electricity rate information about partial supply power provided by an electric power company or a sales company by connecting to the site of an electric power company that performs partial supply of electric power or a sales company that sells the partial power supply on behalf of the Internet A communication department to obtain,
Based on the electricity price information obtained by the communication unit and the demand power stored for each partial supply contract power by the demand power discriminating storage unit, an electric power company or sales company suitable for the power usage tendency of the power consumer is selected. A search section for searching,
The display unit displays the information of the electric power company or sales company searched by the search unit,
The transmission unit transmits the information of the electric power company or the sales company searched by the search unit to the outside.

  According to this configuration, the electricity bill information about partial power supply is obtained via the Internet network from the site of the electric power company that performs partial power supply or the sales business that sells the partial power supply on its behalf. Is done. Then, based on the obtained electricity price information and the demand power stored for each partial supply contract power by the demand power discrimination storage unit, an electric power company or a sales company suitable for the power usage tendency of the power consumer Searched by the search unit. The information of the searched electric power company or sales business operator is displayed by the display unit or transmitted to the outside by the transmission unit. For this reason, it is possible to monitor the demand power for the contract power for partial supply, and at the same time, it is a highly convenient demand control device that can provide the power consumer with information on the electric power company or sales company suitable for the power usage trend Can be provided.

  Further, the present invention provides a time or day based on a total of a plurality of partial supply contract powers contracted in the same time zone in a different manner depending on time, day, day of the week, month, or period. Alternatively, the target power is set according to the day of the week, month, or period.

  According to this configuration, even for multiple partial supply contract power contracted in the same time zone in various patterns that differ according to time, day, day of the week, month, or period, the target power is targeted according to the contract pattern. It is set by the power setting unit. Therefore, the target current power is appropriately calculated according to the contract pattern by the target current power calculation unit. Therefore, the power comparison unit compares the target current power appropriately set according to the contract pattern with the current power, and the demand power monitoring by the demand control device is appropriately performed according to the contract pattern.

  According to the present invention, as described above, it is possible to provide a partial supply-compatible demand control device capable of controlling the power demand to fall within the contract power even for the power receiving form in which partial supply is performed.

It is a block diagram which shows schematic structure of the demand control apparatus for partial supply by one embodiment of this invention. It is a prediction graph of the demand power which shows the change of the electric power used with respect to the demand time limit in the time zone when contract power is one. (A) is a graph showing a change in electric power used with respect to time in the cross-type partial supply that is the first pattern of partial supply, and (b) is a time with respect to time in the notification-type partial supply that is the second pattern of partial supply. The graph which shows the change of used electric power, (c) is a graph which shows the change of the used electric power with respect to time in the vertical cut type partial supply which is the 3rd pattern of partial supply. In the demand control apparatus for partial supply by one embodiment, it is the demand power prediction graph which shows the change of the used electric power with respect to the demand time limit in which the sum of a plurality of partial supply contract electric power was set as the target electric power. In a demand control device for partial supply according to a modification of the embodiment, a demand indicating a change in power used with respect to a demand period, in which target power is set stepwise according to the number of contract power for partial supply in the same time period It is an electric power prediction graph.

  Next, the form for implementing the partial supply corresponding | compatible demand control apparatus by this invention is demonstrated.

  FIG. 1 is a block diagram showing a schematic configuration of a partial supply compatible demand control apparatus 1 according to an embodiment of the present invention.

  The power consumption information is input to the input unit 2 of the demand control device 1 from the watt-hour meter 3 with a transmitter via the transmission unit 4. The transmitter-equipped watt-hour meter 3 constitutes a power amount measuring unit, measures the power used by a load device (not shown), and outputs a power pulse proportional to the measured value as used power amount information. The current power calculation unit 5 starts from the start of the demand time period T based on the power pulse input from the watt hour meter 3 with the transmitter via the input unit 2 and the time information input from the demand time counting unit 6. The integrated value of the power used so far is calculated as the current power.

  FIG. 2 is a prediction graph of demand power showing a change in power consumption with respect to the demand time limit in a time zone where the contract power is one. The horizontal axis of the graph represents the demand time limit T, and the vertical axis represents the power used. In the present embodiment, the case where the demand time limit T is 30 minutes will be described. However, depending on the electricity rate menu, there is a case where the demand time limit T is 60 minutes. The current power W1 calculated by the above-described current power calculation unit 5 is at the current time ti after ti minutes have elapsed from the start time t0 of the demand time period T.

  From the operation unit 7 of the demand control device 1, the value of the contract power W contracted with the electric power company is input by the power consumer. The target power setting unit 8 sets, for example, a value of 95% of the contract power W as the target power W2 for a time zone where the contract power is one, based on the value of the one contract power W. This target power W2 is set as the upper limit value of the used power integration value at the end time tE of the demand time limit T, and the demand control device 1 sets the target power set somewhat lower than the contract power W in anticipation of safety. Control is performed so that the power demand does not exceed W2.

  The demand power is also referred to as “demand”, and is the average power consumption in the demand time period T, and the largest value in one month is the maximum demand power of the month. In the case of a customer whose contract power W is 50 kW or more and less than 500 kW, the contract power W is the largest value among the maximum demand power of each month in the past year including the current month. When the maximum demand power exceeds the contract power W, the contract power W for the month becomes the maximum demand power for the month, and the contract power W for 11 months thereafter is not changed even if it falls below that value. In the case of a customer whose contract power is 500 kW or more, the contract power W is determined by a value calculated based on the capacity of the contract facility. When the contract power W is exceeded, the contract surplus is paid, and the contract power W may be changed.

  In the graph shown in FIG. 2, a straight line connecting the power usage value 0 at the start time t0 and the target power W2 at the end time tE represents the ideal integrated value of the power usage at each demand time t. The ideal integrated value of the power used at the current time ti is expressed as the target current power W3. The target current power calculation unit 9 calculates, as the target current power W3, an ideal integrated value of power used that increases in proportion to the elapsed time t within the demand time period T with the target power W2 as a final value.

The predicted power calculation unit 10 calculates the integrated value of power that will be used by the end time tE of the demand time limit as the predicted power W4 from the increasing tendency of the current power W1 as follows. Assuming that n power pulses having a weight of q per pulse are observed by the current power calculation unit 5 between time tj and current time ti, a measurement interval Δt (= t from time tj to current time ti (= The increase ΔP in the used power at ti−tj) is calculated by the predicted power calculation unit 10 using the following equation (1).
ΔP = q × n (1)

Next, the predicted power W4 after the remaining time tx (= T−ti) of the demand time limit is calculated by the predicted power calculation unit 10 using the following equation (2) from the increasing tendency ΔP / Δt of the current power W1. The
W4 = W1 + (ΔP / Δt) × tx (2)

  The power comparison unit 11 compares the target current power W3 calculated by the target current power calculation unit 9 with the current power W1 calculated by the current power calculation unit 5, and outputs the comparison result to the demand control unit 12. . Further, the power comparison unit 11 subtracts the target power W2 set by the target power setting unit 8 from the predicted power W4 calculated by the predicted power calculation unit 10, and sets the predicted power W4 at the end time tE of the demand time period T. The adjustment power X (= W4−W2) necessary for matching with the power W2 is calculated.

  As a result of comparison in the power comparison unit 11, the demand control unit 12 controls the alarm output unit 13 to generate a caution alarm at time t1 when the current power W1 exceeds the target current power W3 (W1 ≧ W3). Further, the demand control unit 12 continues the current power W1 to exceed the target current power W3, the excess adjustment power X (≧ 0) becomes larger than the cutoff power Y (X ≧ Y), and the end time of the demand time limit T At time t2 at which the predicted power W4 is predicted to exceed the target power W2 at tE, the alarm output unit 13 is controlled to output an alarm sound or the like to issue an alarm. The cut-off power Y is the load power that can be cut off. In addition, when the automatic control setting of the load amount is performed in advance, the demand control unit 12 controls the load blocking unit 14 to block the load by a predetermined method, and the predicted power W4 is included in the target power W2. Control to adjust to.

  For example, when the automatic control setting of the load amount is performed in advance by the priority order method, the demand control unit 12 controls the load blocking unit 14 so that power supply to the load devices with low importance is sequentially performed. Shut off and resume energization from load equipment with high priority when returning. In addition, when the automatic control setting of the load amount is performed in a cyclic manner, the demand control unit 12 controls the load blocking unit 14 to equalize the number of times of blocking and the blocking time for each load device. In this way, the power supply to each load device is controlled.

  In addition, the demand control unit 12 controls the alarm output unit 12 to release the caution alarm at time t3 when the current power W1 returns to the target current power W3. At time t4 when the current power W1 is further lower than the target current power W3 and the margin adjustment power X (<0) is larger than the return power Z (X ≧ Z), the cutoff alarm is also released. The return electric power Z is electric power required to return the energization to the interrupted load, and is set to a value with a margin for the interruption electric power Y in order to prevent load control flapping. Further, the alarm output unit 13 is controlled to generate an excess alarm at a time t5 when the predicted power W4 is likely to exceed the target power W2 in this state.

  The demand control device 1 according to the present embodiment is capable of receiving power by partial supply contracted with a plurality of electric power providers in addition to power receiving by contract power contracted with one electric power company. It has. When receiving power with partial supply, the content of the contract for partial supply is input from the operation unit 7 to the demand control device 1 by the power consumer. The target power setting unit 8 sets the target power W2 based on the time zone in which the partial supply contract is performed and the type of contract power for partial supply, which are input from the operation unit 7. For the type of contract power for partial supply, there is a base supply that does not follow the load but supplies a fixed amount of power, and a load that supplies power by changing the supply amount according to the load amount. There is a follow-up supply.

  Moreover, the following three patterns are mentioned as a partial supply pattern. The first pattern is shown in the crossing type shown in the graph of FIG. 3A, the second pattern is shown in the notification type shown in the graph of FIG. 3B, and the third pattern is shown in the graph of FIG. 3C. It is a vertical cut type. In each graph, the horizontal axis represents time, and the vertical axis represents power used.

  In the crosswise partial supply of the first pattern shown in the graph of FIG. 3A, a general electric company (or a specific-scale electric company) has a certain amount of base as contract power A for partial supply in all time zones. A specific scale electric power company (or a general electric power company) performs a load following supply as contract power B for partial supply. In the notification-type partial supply of the second pattern shown in the graph of FIG. 3 (b), each of the specific-scale electric power providers (or general electric power companies) as the partial supply contract power C (= C1, C2, C3). A base supply is performed based on a notification value in a time zone, and a general electric power company (or a specific-scale electric power company) performs a load following supply excluding the base supply (based on a notification value) as contract power D for partial supply. In the vertical pattern partial supply of the third pattern shown in the graph of FIG. 3C, the electric utility (general electric utility or specific-scale electric utility) serving as the partial supply contract electric power E has a part of the time. A load follow-up supply is performed in the band, and another electric power supplier performs a load follow-up supply in other time periods as the contract power F for partial supply.

  The demand control apparatus 1 according to the present embodiment can set one or more contract powers in the same time zone, and when two or more contract powers exist, the demand control apparatus 1 is set based on the total of partial supply contract powers. An alarm is issued and the load is automatically controlled so as not to exceed the target power W2. Therefore, the target power setting unit 8 sets the target power W2 for each same time period based on the total of the plurality of partial supply contract powers for the time period when there are a plurality of partial supply contract powers in the same time period. Set.

  In the crosswise partial supply of the first pattern shown in the graph of FIG. 3A, the target power setting unit 8 is a supplier (hereinafter “ The total contract power W (= A + B) of the partial supply contract power A (referred to as “base supplier”) and the partial supply contract power B (hereinafter referred to as “load follow-up supplier”) that performs the load following supply. For example, a value of 95% of the total (A + B) is set as the target power W2. The horizontal axis of the graph represents the demand time limit T, and the vertical axis represents the power used. The operation of generating and canceling various alarms by the demand control unit 12 for the target power W2 and the automatic control of energization to the load device are the same as those in the single contract power of one electric power company shown in FIG.

  In addition, the demand control device 1 of the present embodiment can set one or more contract powers individually for each time zone, and the time zone with one contract power is based on the value as described with reference to FIG. Warnings and automatic control are performed so as not to exceed the target power W2 set in (2), and in the time zone where the contract power is two or more, as described with reference to FIG. Warning or automatic control is performed so as not to exceed the power W2.

  In the notification-type partial supply of the second pattern shown in the graph of FIG. 3B, the target power setting unit 8 sets the partial supply contract power C1, C2, C3 and the partial supply contract power D. Based on the total contract power W (= C1 + D, C2 + D, C3 + D), for example, a value of 95% of each total is set as the target power W2. That is, 95% of the total (C1 + D) in the first time zone from 6 to 10 o'clock, for example, 95% of the total (C2 + D) in the second time zone from 10 to 16 o'clock, and the third at 16-20 o'clock. In the time zone, for example, a value of 95% of the total (C3 + D) is set as the target power W2. In other time zones, the contract power W sets the partial supply contract power D of the load following supplier, and the target power W2 at that time is based on the value of the partial supply contract power D. Set 95%. FIG. 2 shows operations for generating and canceling various alarms for each target power W2 by the demand control unit 12 in each of the first to third time zones and other time zones, and automatic control of energization to the load device. It is the same as in the single contract power of the electric power company.

  In the vertical pattern partial supply of the third pattern shown in the graph of FIG. 3C, the partial supply contract power E in the time zone from 6 to 20:00 and the partial supply in the time zone from 20 to 6 hours Both of the contract power F are contracts with a load following supplier which is one electric power company. For this reason, in the time zone from 6 to 20:00, the contract power W sets the contract power E for partial supply of the load following supplier, and the target power setting unit 8 is based on the value of the contract power E for partial supply. , 95% of the value is set as the target power W2. Further, in the time zone from 20 to 6 o'clock, the contract power W sets the contract power F for partial supply of the load following supplier, and the target power setting unit 8 is based on the value of the contract power F for partial supply. 95% of the value is set as the target power W2. Also in this case, the operation of generating and releasing various alarms for each target power W2 by the demand control unit 12 in each time zone and the automatic control of energization to the load device are performed by a single contractor's single contract power shown in FIG. Same as in

  Moreover, the demand control apparatus 1 of this embodiment discriminate | determines and memorize | stores the demand power with respect to each partial supply contract electric power by the demand power discrimination | determination memory | storage part 15 (refer FIG. 1), and displays it by the display part 16, or the transmission part 17 Can be confirmed by transmitting to the external device 18. For this purpose, the demand power discrimination storage unit 15 inputs the current power W1 calculated by the current power calculation unit 5 at the end time tE of the demand time period T as the calculated demand power w for each demand time period T for 30 minutes, To remember. Further, as the breakdown, the demand power for each partial supply contract power is stored.

  In the crosswise partial supply of the first pattern shown in the graph of FIG. 3A, the demand power discrimination storage unit 15 includes a plurality of the calculated demand power w input from the current power calculation unit 5 contracted in the same time zone. Of the partial supply contract powers A and B, the calculated demand obtained by inputting the demand power for the base supply contract power A from the current power calculation unit 5 in the case of the base supply contract power A or less (w ≦ A). The value of the electric power w and the demand power for the load following supply contract power B among the plurality of partial supply contract powers A and B are stored in the memory as zero. Further, when the calculated demand power w exceeds the base supply contract power A (w> A), the demand power for the base supply contract power A is the value of the base supply contract power A, the contract power for load following supply The demand power for B is stored in the memory as a value (= w−A) obtained by subtracting the value of the contract supply power A for base supply from the value of the calculated demand power w.

  Further, in the notification type partial supply of the second pattern shown in the graph of FIG. 3 (b), the current power calculation unit 5 inputs the time between 6 and 20:00 when two contract powers C and D exist. When the calculated demand power w is equal to or less than the partial supply contract power C1, C2, C3 (w ≦ C1, C2, C3), the demand power discrimination storage unit 15 stores each of the partial supply contract power C1, C2, C3. As the demand power, the same value as the calculated demand power w input from the current power calculation unit 5 is stored in the memory. The demand power for the partial supply contract power D at this time is stored in the memory as zero. In addition, when the calculated demand power w input from the current power calculation unit 5 exceeds the partial supply contract power C1, C2, C3 (w> C1, C2, C3), the partial supply contract power C1, C2, As each demand power for C3, the same value as the partial supply contract power C1, C2, C3 is stored in the memory. The demand power for the partial supply contract power D at this time is a value obtained by subtracting each value of the partial supply contract power C1, C2, C3 from the calculated demand power w input from the current power calculation unit 5 (= (w -C1), (w-C2), (w-C3)). Further, in the time zone where the contract power W is 1-20-6 o'clock, the demand power for the partial supply contract power D is stored in the memory as the same value as the calculated demand power w input from the current power calculation unit 5. .

  Further, in the vertical pattern partial supply of the third pattern shown in the graph of FIG. 3C, the demand power for the partial supply contract power E and the demand power for the partial supply contract power F are in each time zone. Are stored in the memory as the same value as the calculated demand power w input from the current power calculator 5.

  The display unit 16 displays the demand power stored in the memory for each partial supply contract power by the demand power discrimination storage unit 15. The transmission unit 17 transmits the demand power to the external device 18.

  Further, the demand control device 1 of the present embodiment has a calendar function, and can determine periods such as time, day, day of the week, month, and season by the time counting function of the time counting unit 6. When the electric power consumer receives a plurality of partial supplies in the same time zone in different manners according to time, day, day of the week, month, or period, the target power setting unit 8 includes first to third targets shown in FIG. The target power W2 is set according to the combination of the partial supply of various patterns that differ depending on the time, day, day of the week, month, or period. At this time, the target power setting unit 8 is based on the partial supply contract information input from the operation unit 7, and a plurality of partial supplies contracted in the same time zone in different modes depending on time, day, day of the week, month, or period. The target power W2 is set according to the time, day, day of the week, month, or period based on the total contract power.

  In addition, the demand control device 1 according to the present embodiment is based on the breakdown of the stored power demand determined and stored as described above and the power bill menu of the power provider obtained through communication. Find a suitable electric utility. For this purpose, the demand control apparatus 1 according to the present embodiment connects to the site of an electric power company that performs partial power supply via the Internet network 19 and obtains the electricity bill information about the electric power company (see FIG. 1). Further, based on the electricity rate information obtained by the communication unit 20 and the demand power stored for each partial supply contract power by the demand power discriminating storage unit 15, an electric utility suitable for the power usage tendency of the power consumer is determined. A search unit 21 for searching is provided. The display unit 16 displays information on the electric power company searched by the search unit 21, and the transmission unit 17 transmits the information on the electric power company searched by the search unit 21 to the external device 18.

  Each functional unit constituting the above-described demand control device 1 is formed by an electronic circuit or realized by an arithmetic function of a microcomputer.

  According to the demand control apparatus 1 of the present embodiment as described above, as described above, the time period in which there are a plurality of partial supply contract powers in the same time period (in the cross-section type partial supply shown in FIG. For the notification-type partial supply shown in FIG. 3 (b), the target power setting unit 8 adds a plurality of contract powers for partial supply (shown in FIG. 3 (a)). The target power W2 is set based on (A + B) in the cross-cut partial supply, and (C1 + D), (C2 + D), (C3 + D)) in the notification-type partial supply shown in FIG. The target current power W3, which is an ideal integrated value of the power used, is calculated by the target current power calculator 9 with the set target power W2 as a final value, and is compared with the current power W1 by the power comparator 11. As a result of the comparison, when the current power W1 becomes equal to or greater than the target current power W3 and the predicted power W4 is predicted to exceed the target power W2 at the end time tE of the demand time period T, the demand control unit 12 causes the alarm output unit 13 to By being controlled, an alarm is issued. Further, by controlling the load interrupting unit 14 by the demand control unit 12, the load is interrupted by a predetermined method, and the predicted power W4 is adjusted within the target power W2. For this reason, according to the demand control apparatus 1 of the present embodiment, it is possible to control the demand power within the contract power W even in the power receiving mode in which partial supply is performed.

  In addition, according to the demand control device 1 of the present embodiment, a plurality of the same time zones (time zones of 6-10 o'clock, 10-16 o'clock, 16-20 o'clock in the notification-type partial supply shown in FIG. ), When there are a plurality of partial supply contract powers ((C1, D), (C2, D), (C3, D)), the target power W2 is the target power for each of the plurality of the same time periods. Set by the setting unit 8. Therefore, the target current power W3 having the set target power W2 as a final value is calculated by the target current power calculation unit 9 for each of a plurality of the same time periods, and the calculated target current power W3 and the current power W1 are calculated. The power comparison unit 11 compares them. Then, according to the comparison result, the demand control unit 12 issues an alarm, or performs control in which the load is cut off by a predetermined method and the predicted power W4 is adjusted within the target power W2.

  Further, according to the demand control device 1 of the present embodiment, the calculated demand power w calculated by the current power calculation unit 5 is the contract power for base supply (A, FIG. 3 in the cross-section partial supply shown in FIG. In the case of C1, C2, C3) or less in the notification type partial supply shown in (b), the demand power for the contract power for base supply (A, C1, C2, C3) is the value of the calculated demand power w and the load following The demand power for the supply contract power (B, D) is set to zero and stored in the memory by the demand power discrimination storage unit 15. When the calculated demand power w exceeds the base supply contract power (A, C1, C2, C3), the demand power for the base supply contract power (A, C1, C2, C3) is the base supply contract power. The demand power for the values of power (A, C1, C2, C3) and the contract power for load following supply (B, D) is calculated based on the value of calculated demand power w (A, C1, C2, C3). ) Is stored in the memory by the demand power discrimination storage unit 15 as a value obtained by subtracting the value of. The demand power stored for each partial supply contract power (A, B, C1, C2, C3, D) by the demand power discrimination storage unit 15 is displayed by the display unit 16 or transmitted to the external device 18 by the transmission unit 17. Sent. For this reason, each of the partial supply contract powers (A, B, C1, C2, C3, D) for a plurality of partial supply contract powers (A, B, C1, C2, C3, D) contracted in the same time zone. ) It becomes possible to know the power demand and its history every time. Further, regarding the partial supply contract power (E, F) contracted one by one in different time zones, it becomes possible to know the demand power and its history for each partial supply contract power (E, F). .

  Further, according to the demand control device 1 of the present embodiment, the electricity bill information about the partial power supply is obtained from the site of the electric power supplier that performs the partial power supply via the Internet network 19 by the communication unit 20. Then, based on the obtained electricity rate information and the demand power stored in the memory for each partial supply contract power (A, B, C1, C2, C3, D, E, F) by the demand power discrimination storage unit 15. Furthermore, the search unit 21 searches for an electric power company suitable for the power usage tendency of the power consumer. The retrieved information about the electric power company is displayed on the display unit 16 or transmitted to the external device 18 by the transmission unit 17. For this reason, it is possible to monitor the demand power for the contract power for partial supply (A, B, C1, C2, C3, D, E, F), and to inform the power consumer of information on the electric utility suitable for the power usage tendency A highly convenient demand control apparatus 1 that can be provided can be provided.

  In addition, according to the demand control apparatus 1 of the present embodiment, the contract is also applied to a plurality of partial supply contract powers contracted in the same time zone in various patterns that differ according to time, day, day of the week, month, or period. The target power W2 is set by the target power setting unit 8 according to the pattern. Therefore, the target current power W3 is appropriately calculated by the target current power calculation unit 9 according to the contract pattern. Therefore, the power comparison unit 11 compares the target current power W3 appropriately set according to the contract pattern with the current power W1, and the demand power monitoring by the demand control device 1 is appropriately performed according to the contract pattern. .

  In the above embodiment, when two or more contract powers exist in the same time zone, a warning or load amount is set so that the demand power does not exceed the target power W2 set based on the total of the partial supply contract powers. The case where automatic control is performed has been described. However, the target power may be set stepwise in accordance with the number of partial supply contract powers in the same time zone.

  For example, in the cross-type partial supply shown in FIG. 3A in which two partial supply contract electric powers A and B exist in the same time zone, the target power is set to two as shown in the demand power prediction graph shown in FIG. Set in stages. The horizontal axis of the graph of FIG. 5 represents the demand time limit T, and the vertical axis represents the power used. Initially, warnings and automatic load control were performed so that the control target power W21 set based on the contracted power A for partial supply of the base supplier was not exceeded, and the current power W1 exceeded the contracted power A for partial supply. In this case, a warning and automatic load amount control are performed so as not to exceed the target power W22 set based on the sum (A + B) of the partial supply contract powers A and B. The operation of generating and canceling various alarms by the demand control unit 11 for each target power W21 and W22 and the automatic control of energization to the load device are the same as those in the single contract power of one electric power company shown in FIG. .

  Therefore, the target power setting unit 8 uses the power at the end time tE of the demand time limit T based on the base supply contract power A among the plurality of partial supply contract powers A and B contracted in the same time period. As the upper limit value of the integrated value, 95% of the base supply contract power A is set as the suppression target power W21. The target current power calculation unit 9 is an ideal of the power used that increases in proportion to the elapsed time t within the demand time period T, with the suppression target power W21 as the final value for the current power W1 that is less than or equal to the base supply contract power A. The integrated value is calculated as the suppression target current power W31. When the current power W1 is equal to or less than the base supply contract power A, the power comparison unit 11 compares the current power W1 with the suppression target current power W31. As a result of the comparison in the power comparison unit 11, the demand control unit 12 is predicted that the current power W1 becomes equal to or greater than the suppression target current power W31, and the predicted power W4 exceeds the suppression target power W21 at the end time tE of the demand time period T. In this case, the alarm output unit 13 is controlled to issue a second alarm, or the load cutoff unit 14 is controlled to shut off the load in a predetermined manner, and is set based on the contract power A for base supply. Control for adjusting the predicted power W4 within the suppression target power W21 is performed.

  Even if a second alarm is issued by the demand control unit 12 or the load is cut off by a predetermined method and the predicted power W4 is adjusted within the suppression target power W21, the current power W1 is supplied to the base. When exceeding the contract power A, the power comparison unit 11 switches the suppression target power W21 to the target power W22 set based on the sum (A + B) of the plurality of partial supply contract powers A and B, The target current power W32 having the target power W22 as a final value is compared with the current power W1. Then, as a result of the comparison in the power comparison unit 11, the demand control unit 12 is predicted that the current power W1 becomes equal to or greater than the target current power W32 and the predicted power W4 exceeds the target power W22 at the end time tE of the demand time period T. In this case, the alarm output unit 13 is controlled to issue an alarm, or the load blocking unit 14 is controlled to block the load in a predetermined manner, and the total of the partial supply contract powers A and B (A + B) is calculated. Control for adjusting the predicted power W4 within the target power W22 set based on the control is performed.

  For this reason, if the electricity charge of the contract power B for load following supply is higher than that of the contract power A for base supply and the base power contract power A is cheaper than the base supply contract power A, it is necessary to supply power as much as possible. The ratio of the contract power A for base supply among the contract powers A and B for use is high, and it is possible to control the demand power suitable for the case where it is desired to limit the power reception to one electric power supplier that performs the base supply.

  Also in the notification type partial supply in FIG. 3B in which two partial supply contract electric powers (C1, D), (C2, D), and (C3, D) exist in a plurality of the same time periods, The target power is set in two stages by the power setting unit 8, and each of the base supplies of a plurality of partial supply contract powers (C1, D), (C2, D), (C3, D) contracted for each same time period Based on the contract power C1, C2 and C3, the target power setting unit 8 sets the suppression target power W21 for each same time period. Then, for each current time period, the suppression target current power W31 whose final value is the suppression target power W21 is the target current power calculation unit 9 for the current power W1 of the base supply contract powers C1, C2, C3 and lower. Is calculated by In this case, the suppression target current power W31 and the current power W1 are compared by the power comparison unit 11 for each of a plurality of the same time zones, and a second alarm is issued by the demand control unit 12 according to the comparison result. Alternatively, control is performed in which the load is cut off by a predetermined method and the predicted power W4 is adjusted within the suppression target power W21.

  Further, in this case, the same time period based on the sum (C1 + D), (C2 + D), and (C3 + D) of the contract powers for partial supply (C1, D), (C2, D), (C3, D). The target power W22 is set by the target power setting unit 8 for each band. For the current power W1 exceeding the base supply contract power C1, C2, C3, the target current power W32 having the target power W22 as a final value is calculated by the target current power calculation unit 9 for each same time period. The Then, the target current power W32 and the current power W1 are compared by the power comparison unit 11 for each of a plurality of the same time zones, and an alarm is issued by the demand control unit 12 according to the comparison result, or the load is increased. Control is performed so that the predicted power W4 is adjusted within the target power W22 by being cut off by a predetermined method.

  In addition, when partial supply contracts are made with a plurality of base suppliers in the same time zone, the target power setting unit 8 sets the suppression target power W21 based on the total of the partial supplier contract powers. Alternatively, the suppression target power W21 is set according to the priority order determined in advance by the power consumer among the base suppliers. For example, in the same time period, three electric utilities and demands are contracted power G for partial supply of base supplier, contracted power H for partial supply of base supplier, and contracted power I for partial supply of load following supplier. When the house is contracted, the suppression target power W21 is set by the target power setting unit 8 based on the sum (G + H) of the contract powers G and H for partial supply, and the suppression target current with the suppression target power W21 as the final value The power W31 is calculated by the target current power calculator 9. For the current power W1 that exceeds the sum (G + H) of the partial supply contract powers G and H, the target power W22 is set as the target power based on the total of the partial supply contract powers G, H, and I (G + H + I). The target current power W32 set by the unit 8 and having the target power W22 as a final value is calculated by the target current power calculation unit 9.

  Or, when the electricity charge of the partial supply contract power G is lower than the partial supply contract power H among the partial supply contract powers G and H of the base supplier, the priority determined by the power consumer in advance In accordance with the rank, the first suppression target power W211 is set by the target power setting unit 8 based on the contracted power G for partial supply with a low priority electricity price, and the first suppression target power W211 is set as the final value. The first suppression target current power W311 is calculated by the target current power calculation unit 9. For the current power W1 that exceeds the partial supply contract power G, the second suppression target power W212 is set by the target power setting unit 8 based on the sum (G + H) of the partial supply contract powers G and H. Then, the second suppression target current power W312 having the second suppression target power W212 as a final value is calculated by the target current power calculation unit 9. Furthermore, for the current power W1 that exceeds the total partial supply contract power (G + H), the target power W22 is set by the target power setting unit 8 based on the total partial supply contract power (G + H + I). The target current power W32 with W22 as the final value is calculated by the target current power calculator 9.

  Also in the demand control apparatus 1 according to such a modified example in which the target power is set stepwise according to the number of partial supply contract powers in the same time zone, the demand power discrimination storage unit 15 is similar to the above-described embodiment. Thus, it is possible to know the power demand and its history for each partial supply contract power. In addition, by connecting to the Internet network 19 via the communication unit 20, it is possible to know an electric utility suitable for the power usage tendency. Also, demand power is appropriately monitored for a plurality of partial supply contract powers contracted in the same time zone in various patterns that differ according to time, day, day of the week, month, or period.

  In addition, in said embodiment and modification, the watt-hour meter 3 with a transmitter comprised the electric energy measuring part, and the case where the demand control apparatus 1 inputs the electric power pulse as used electric energy information was demonstrated. However, the demand control device 1 may input the used power amount information as data from the power amount measuring unit such as the watt hour meter 3. Further, a power amount measuring unit may be configured inside the demand control device 1, and pulses and data output from the power amount measuring unit may be used as power consumption information.

  Further, in the above-described embodiments and modifications, the communication unit 20 is connected to the site of an electric power company that performs partial power supply via the Internet network 19 and is based on the electric power price menu of the electric power company obtained through communication. In the above description, the search unit 21 searches for an electric power company suitable for the power usage tendency of the power consumer. However, if there is a sales company that sells the partial supply power on behalf of the sales company, the communication unit 20 connects to the site of the sales company via the Internet network 19 and the electricity price of the sales company obtained through communication is obtained. Based on the menu, the search unit 21 may be configured to search for a sales company suitable for the power usage tendency of the power consumer. In this case, the display unit 16 displays information on the sales company searched by the search unit 21, and the transmission unit 17 transmits the information on the sales company searched by the search unit 21 to the external device 18.

DESCRIPTION OF SYMBOLS 1 ... Demand control apparatus 2 ... Input part 3 ... Power meter with transmitter 4 ... Transmission part 5 ... Current power calculation part 6 ... Time counting part 7 ... Operation part 8 ... Target power setting part 9 ... Target current power calculation part 10 ... Predictive power calculation unit 11 ... Power comparison unit 12 ... Demand control unit 13 ... Alarm output unit 14 ... Load cutoff unit 15 ... Demand power discrimination storage unit 16 ... Display unit 17 ... Transmission unit 18 ... External device 19 ... Internet network 20 ... Communication unit 21 ... Search unit

Claims (7)

Based on the power consumption information input from the power measurement unit, a current power calculation unit that calculates the integrated value of power used from the start of the demand time period to the present as the current power, and used by the end time of the demand time period A predicted power calculation unit that calculates an integrated value of the power that will be calculated as a predicted power from the increasing tendency of the current power, and an upper limit value of the integrated value of power used at the end time of the demand time period is set based on the contract power A target current power calculation unit that calculates, as the target current power, an ideal integrated value of power used that increases in proportion to the elapsed time within the demand time period with the target power as a final value, and compares the current power with the target current power As a result of comparison between the power comparison unit and the power comparison unit, the current power exceeds the target current power, and the predicted power exceeds the target power at the end time of the demand time limit. In a demand control apparatus and a demand control unit for performing the issuing an alarm, or control the said predicted power shut off in a predetermined manner the load is adjusted to within the target power when it is predicted that,
A target power setting unit that sets the target power based on a total of a plurality of partial supply contract powers for a time zone in which there are a plurality of partial supply contract powers in the same time zone;
The target supply power demand control apparatus, wherein the target current power calculation unit calculates the target current power using the target power set by the target power setting unit as a final value. The target power setting unit suppresses target power as an upper limit value of the integrated power consumption at the end time of the demand period based on the contract power for base supply among the contract power for partial supply contracted in the same time period. Set
The target current power calculation unit calculates an ideal integrated value of power used that increases in proportion to the elapsed time within the demand period with the suppression target power as a final value for the current power that is equal to or less than the contract power for base supply. Calculated as the suppression target current power,
The power comparison unit compares the current power with the suppression target current power when the current power is equal to or less than the contract power for base supply, and compares the current power when the current power exceeds the contract power for base supply. Compare the power with the target current power,
The demand control unit is second when the current power is equal to or higher than the suppression target current power as a result of the comparison in the power comparison unit, and the predicted power is predicted to exceed the suppression target power at the end time of the demand time limit. The demand control device for partial supply according to claim 1, wherein an alarm is issued or a load is cut off by a predetermined method to control the predicted power within the suppression target power.   3. The suppression target power is set for each same time zone based on each base supply contract power of a plurality of partial supply contract powers contracted for a plurality of same time zones. The demand control device for partial supply described in 1.   4. The target power is set for each same time zone based on each total of a plurality of partial supply contract power contracted for a plurality of same time zones. The partial supply corresponding demand control device according to any one of the preceding claims. When the calculated demand power, which is the current power calculated by the current power calculation unit at the end time of the demand time limit, is equal to or less than the base supply contract power among a plurality of partial supply contract power contracted in the same time zone Storing the demand power for the base supply contract power as the value of the calculated demand power, the demand power for the load following supply contract power among the partial supply contract powers as zero, and calculating the calculated demand power Is greater than the base supply contract power, the demand power for the base supply contract power is the value of the base supply contract power, and the demand power for the load following supply contract power is the calculated demand power. A demand power discriminating storage unit that stores a value obtained by subtracting the value of the contract power for base supply from the value of
The display unit for displaying the demand power stored by the contract power for partial supply by the demand power discrimination storage unit or a transmission unit for transmitting to the outside. 5. The demand control device for partial supply according to the item. Electricity for partial supply power provided by an electric company that performs partial supply of electric power or a sales company that sells partial supply electric power on behalf of a distributor is connected via the Internet network. A communication department to obtain pricing information;
Based on the electricity rate information obtained by the communication unit and the demand power stored for each partial supply contract power by the demand power discrimination storage unit, the electric utility suitable for the power usage tendency of the power consumer or A search unit for searching for the sales company,
The display unit displays information on the electric power company or the sales business operator searched by the search unit,
The partial supply-compatible demand control device according to claim 5, wherein the transmission unit transmits information on the electric power company or the sales business operator searched by the search unit to the outside.   The target power setting unit is based on the sum of a plurality of partial supply contract powers contracted in the same time zone in a different manner depending on time, day, day of the week, month, or period, or time, day, day of the week, month, or The demand control device for partial supply according to any one of claims 1 to 6, wherein the target power is set according to a period.

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