JPH1189117A - Demand monitoring and controlling device and method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a demand monitoring and controlling device capable of automatically performing the jobs from the monitoring of a demand up to the control of a plurality of air conditioners in order to save electric power efficiently. SOLUTION: In a demand monitoring and controlling device whose CPU 13 is connected to a pulse detector 201 which detects pulses to be outputted from a pulse oscillator 200 of an electric power company, and a switching function for the on-off control of a plurality of air conditioners No. 1 to No. 8, the CPU 13 calculates a predicted power R0 and a second target power P2 from the present power P corresponding to the number of pulses per a certain time at an initial stage. Then, after setting the smaller one of the second target power P2 and monthly target power P1 to reference power P0 , the CPU 13 again calculates predicted power R from the present power P. If the predicted power R exceeds the reference power P0 , a signal is transmitted to switch off one of the air conditioners and restart it in t seconds. If predicted power calculated next exceeds the reference power, the control is repeated of transmitting a signal for sequentially switching off an air conditioner next to the switched-off air conditioner and restarting it until the predicted power becomes equal to or lower than the reference power.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a demand monitoring control method and a demand monitoring control device. More specifically, the present invention relates to a control device having a predictive monitoring control function for a target power and a control method thereof in order to keep the maximum demand power below a management value and promote efficient operation and energy saving of power equipment.

[0002]

2. Description of the Related Art From 1988, the method of calculating electricity rates was changed to a demand contract method, and the method was gradually applied to familiar facilities. This contract system uses the peak value of the power consumption for one year as a basis for the basic fee, and at present, a high basic fee is paid even when the peak value is not reached. Since the contract demand value is determined according to the power consumption of the normal business, effective power saving can be achieved by suppressing the power consumption so as not to affect the daily business. That is, as shown in FIG. 5, the electric power consumption is the highest in July, August,
Since the peak occurs around September, it is possible to effectively and effectively save power by controlling only those air conditioners that consume relatively large amounts of power.

As shown in FIG. 6, a conventional demand monitoring and control device detects a pulse sent from a power measuring instrument of a power company every 30 minutes, and calculates a predicted power from a current power P obtained from the number of pulses. calculates R, is compared with target power P ₁ of each month in advance set the predicted power R. And
Predicted power R is generated an alarm, such as by sound or lamp exceeds the target power P _1, is intended to release an alarm predicted power R is equal to or smaller than the target power P _1. The current power P and the predicted power R are calculated by the following equations. Current power P = (number of input pulses up to the present time) × PCT ratio × 2 / pulse constant (1) predicted power R = P + (ΔP / Δt) × (30−t) (ΔP: demand of Δt minutes) Increase) (2)

When an alarm is issued, the consumer turns off the operating air conditioner to cancel the alarm. That is, the conventional demand monitoring control device mainly monitors demand. According to this, the consumer side needs to always worry about the presence or absence of the alarm of the demand monitoring control device, and requires a human resource to turn off and turn on the switch of the air conditioner each time, which places a heavy burden on the consumer side.

[0005]

SUMMARY OF THE INVENTION The present invention has been conceived to solve the above-mentioned problems, and the object of the present invention is to automatically perform processing from demand monitoring to air conditioner control. It is an object of the present invention to provide a demand monitoring control device that can perform power saving efficiently.

[0006]

In order to achieve the above object, a demand monitoring control method according to the present invention comprises a pulse detecting a pulse signal sent from a pulse oscillator (200) of a meter for measuring electric energy of a power company. A signal from the detector (201) is input, a predicted power (R) is calculated from a current power (P) corresponding to the number of pulses per fixed time, and the predicted power (R) is set in the storage unit (11) in advance. has been compared to the current month target power of a desired power of each month (P _1), the predicted power (R) is greater than the target power (P _1), a signal to turn off the air conditioner to the air conditioner side It is characterized by transmitting.

According to a second aspect of the present invention, there is provided a demand monitoring control apparatus comprising: a pulse detector (201) for detecting a pulse signal sent from a pulse generator (200) of an electric energy measuring instrument of a power company; Air conditioners (No. 1 to N
o. 8) A demand monitoring control device in which a switch function for on / off control is connected to the control unit (13). The control unit (13) receives a signal from the pulse detector (200), The predicted power (R) is calculated from the current power (P) corresponding to the number of pulses per time, and the predicted power (R) is set to the target power for the current month among the target powers for each month preset in the storage unit (11). (P ₁₎ compared to, the predicted power (R) is greater than the target power (P _1), one of the plurality of air conditioners (No.1~No.8) (No.n)
Is turned off and a signal for automatically returning after a predetermined time (t) has elapsed is transmitted to the air conditioner (No. n) side. When the predicted power (R) calculated next exceeds the target power (P ₁ ), The next air conditioner (No. n + 1), which has been turned off, among the plurality of air conditioners (No. 1 to No. 8) is sequentially turned off, and a signal for automatically returning after a lapse of a predetermined time (t) is output to the air conditioner (No.
The control for transmitting to the (n + 1) side is repeatedly performed until the predicted power (R) becomes equal to or less than the target power (P ₁ ).

The invention according to claim 3 provides a pulse detector (201) for detecting a pulse signal sent from a pulse oscillator (200) of an electric energy measuring instrument of an electric power company and a plurality of air conditioners (No. 1 to No. 8) are demand monitoring control devices each having a switch function for on / off control connected to the control unit (13).
A signal from the pulse detector (200) is input, and in the initial stage, a predicted power (R ₀ ) is calculated from a current power (P) corresponding to the number of pulses per fixed time, and according to the predicted power (R ₀ ) The second target power (P ₂ ) is calculated, and the second target power (P ₂ ) is compared with the target power (P ₁ ) of the current month among the monthly target powers set in the storage unit (11) in advance. toward the second target power (P ₂₎ is larger than the target power (P _1), and target power (P ₁₎ of the reference power (P _0), the second conversely
If the target power (P ₂ ) is less than or equal to the target power (P ₁ ), the second target power (P ₂ ) is set to the reference power (P ₀ ), and then the pulse detector (200) again outputs the target power (P ₂ ). , A predicted power (R) is calculated from the current power (P) corresponding to the number of pulses per fixed time, and the predicted power (R) is compared with a set reference power (P ₀ ). When the predicted power (R) exceeds the reference power (P ₀ ), one (No. n) of the plurality of air conditioners (No. 1 to No. 8) is turned off and automatically returned after a predetermined time (t) has elapsed. A signal to be transmitted is transmitted to the air conditioner (No. n) side, and when the predicted power (R) calculated next exceeds the reference power (P ₀ ), a plurality of air conditioners (No. 1 to No. 8) are generated. Out of the air conditioners (No. n + 1), which are turned off, are sequentially turned off, and a signal for automatically returning after a predetermined time (t) elapses is output from the air conditioner. Opportunity of (No.n + 1) control sending to the side, and performs repeatedly until the predicted power (R) becomes the reference power (P ₀₎ less.

Further, the invention according to claim 4 is the invention according to claim 2.
Or the control unit (13) according to 3 includes a plurality of air conditioners (N
o. 1 to No. 8) It is characterized in that it is determined whether or not the operating air conditioner is smaller than a predetermined value, and when it is smaller, the control for turning off the air conditioner is not started.

The symbols in parentheses indicate corresponding elements or items in the description of the embodiments of the present invention, which will be described later with reference to the drawings.

According to the demand monitoring control method of the present invention, the predicted power is calculated from the current power, and the predicted power is compared with a target power for the current month set in a storage unit in advance. Is exceeded, the signal to turn off the air conditioner is automatically sent to the air conditioner side instead of issuing an alarm as shown in the conventional example, so the current power decreases accordingly, and the predicted power Also decrease. As a result, the power can be suppressed to the target power or less.

According to the demand monitoring control device of the second aspect, the control unit to which the switch function for controlling on / off of the plurality of air conditioners is connected respectively calculates the predicted power from the current power and calculates the predicted power. When the predicted power exceeds the target power in comparison with the target power of the current month, a signal to turn off one of the plurality of air conditioners and automatically return after a predetermined time has elapsed is transmitted to the air conditioner side, and further calculated next. When the predicted power exceeds the target power, control is performed to sequentially turn off the next air conditioner that has been turned off among the plurality of air conditioners and transmit a signal to the air conditioner to automatically return after a predetermined time has elapsed. Since the repetition is performed until the following, the peak value of the power consumption can be suppressed to the target power or less particularly in the summer season, and the power consumption can be suppressed to the target power of each month even in the other next period, If manner it is possible to reduce power costs.

Further, since the air conditioner is automatically turned off without requiring human resources, the burden on the consumer side is smaller than in the conventional example. Further, the air conditioners to be turned off are not the same air conditioners, but are turned off according to a predetermined sequence among a plurality of air conditioners, so that there is no particular problem with the circulation efficiency in the room.

According to the third aspect of the present invention, the control unit does not directly compare the predicted power with the target power of the current month, but plays a role of providing a breakwater to the target power of the current month. In the initial stage, the predicted power is calculated from the current power corresponding to the number of pulses per fixed time at the initial stage, and is calculated according to the predicted power. Then, after the smaller of the second target power and the target power of the current month is set as the reference power, a new predicted power is calculated again, and the predicted power is compared with the set reference power. Is exceeded, a signal to automatically turn off one of the plurality of air conditioners and automatically return after a predetermined time elapses is transmitted to the air conditioner side. The control of transmitting a signal to automatically turn off the next air conditioner that has been turned off among the air conditioners and automatically returning the air conditioner after a predetermined time has elapsed to the air conditioner side is repeatedly performed until the predicted power becomes equal to or less than the reference power. In this way, since the second target power is set as a breakwater against the target power of the current month, which is the final target value, in addition to the effect of the invention described in claim 2, fine control becomes possible. Power can be saved efficiently.

Further, according to the invention described in claim 4, the control unit determines whether the operating air conditioner among the plurality of air conditioners is smaller than a predetermined value. Since the control for turning off the air conditioner is not started, it is possible to prevent the control from being excessive, and it is possible to perform the control according to the actual operating condition of the air conditioner. According to an embodiment of the invention described below, the determination as to whether the operating air conditioner among the plurality of air conditioners is smaller than a predetermined value is a numerical value derived based on the control start rate S. However, the control start power SW is determined in step 13 (FIG. 2).

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A demand monitoring control device according to an embodiment of the present invention will be described with reference to the drawings. FIG.
FIG. 1 is a block diagram illustrating a schematic configuration of a demand monitoring control device 100 according to the present embodiment. The demand monitoring control device 100 includes a storage unit 11 having a built-in RAM and the like,
A ROM 12 to which a control pattern is input, a CPU 13 corresponding to a control unit for controlling the entire device, a clock device CT
And a 10-second timer TM, an operation display unit 16 and the like. The CPU 13 has a pulse detector for detecting a pulse output every 30 minutes from the pulse oscillator 200 of the electric energy measuring instrument of the electric power company. The detection signal from 201 is input. Further, the CPU 13 and a plurality of air conditioners (eight units No. 1 to No. 8 in this embodiment) are connected via an interface (not shown).
The PU 13 is provided with a switch function for controlling on / off of a plurality of air conditioners.

Next, with reference to FIG. 2 and FIG. 3, the processing contents of the demand monitoring control of the CPU 13 shown in FIG. 1 will be described. When the power is turned on, the CPU 13 initializes the entire device (Step 1; "Hereinafter, the word" step "is omitted in parentheses)". Then, data input by the user is read (2). The data to be input, date, time, number of channels (that is eight planes in the present embodiment in which shows the number of air conditioner), 12 pieces of the target power P ₁ of the month, the base power P ₃ (Electricity value of load equipment other than air conditioner that cannot be shut off at all), control rate θ
(A basic value of load control), a control start rate S (a numerical value for determining that control is performed if an air conditioner is operating at a set rate or more), and a PCT ratio (indicating a combined metamorphic ratio, The current power P is calculated (the numerical value used in the equation (1)), the control start power SW (a criterion for determining that the load control is not to be performed when the second target power P ₂ is less than the numerical value). Value, which is a constant derived from SW = P ₃ + (P ₁ −P ₃ ) × S), pulse constant (numerical value used in equation (1) for calculating current power P), load control time t
(Interruption time of air conditioner load). The input of data is performed via the operation display unit 16.

After the reading of the data, the clock device CT is adjusted to the zero point, and the clock device CT is started from 0 minute 00 seconds (3). The zero point adjustment of the clock device CT is performed by manually setting the clock device CT so as to coincide with, for example, a starting point of a 30-minute cycle determined by an electric power company.
Starts. Next, the CPU 13 transmits a return permission signal to each air conditioner (4), and sets 1 to a register M used for processing described later (5). Here, the return permission signal is transmitted when the air conditioner being controlled from on to off from the previous time period remains accurate at the initial calculation stage. The air conditioner is not controlled (at the first time, no air conditioner is being controlled).

Next, the CPU 13 comprises a pulse detector 201
(6), the current power P is calculated from the number of input pulses based on the equation (1) shown in the conventional example (7), and the predicted power R is calculated from the equation (2) ( 8). Then, the obtained predicted power R is set in the register R ₀ (9), and from the value, the second target power P ₂ is calculated as P ₂ = R−Rθ
Calculated from (10), comparing the current month to the target power P ₁ to the second target power P ₂ set in advance (11).

[0020] Then, the second target power P ₂ is set target power P ₁ as the reference power P ₀ exceeds the target power P ₁ (12), when the second target power P ₂ is less than the target power P ₁ The second target power P ₂ is further compared with the control start power SW (1
3), but sets the second target power P ₂ as the reference power P ₀ is larger than the control start power SW (14), becomes a second target power P ₂ is less than the control start power SW and uncontrolled Step 37 Proceed to. In other words, set the breakwater Hisage specific role second target power P ₂ relative to the target power P _1, as shown in FIG. 4 (a), the second target power P ₂ exceeds the target power P ₁ Unless otherwise, the second target power P ₂ is used as the reference power P
_When the predicted power R exceeds the reference power P ₀ (= second target power P ₂ ), control is performed to set the predicted power R to the reference power P ₀ , and conversely, as shown in FIG. As described above, when the second target power P ₂ is equal to or less than the target power P ₁ , the target power P
_Assuming that ₁ is the reference power P ₀ , the predicted power R is the reference power P ₀
When (= target power P ₁ ) is exceeded, control is performed to set the predicted power R to the reference power P ₀ . Incidentally, when the second target power P ₂ is less than the control start power SW in order to enable fine control in accordance with the operating condition of the actual air conditioner is for the non-controlled state.

When the target power P ₁ or the second target power P ₂ is set to the reference power P ₀ , the clock device CT waits for 20 seconds to elapse (15), and after that, starts the 10-second timer TM (16). ) The following processing is performed until the 10 second timer TM is over (35). That is, a signal from the pulse detector 201 is received (17), and the current power P is calculated from the number of input pulses based on the equation (1) shown in the conventional example.
Is calculated (18), and the predicted power R is calculated from the equation (2) (19). Then, the obtained predicted power R is compared with the set reference power P ₀ (20), and the predicted power R is set to the reference power P _0.
If the flag F, which is larger and indicates that the clock device CT has passed 27 minutes 00 seconds in steps 33 and 34, is not 1 (F = 0), the demand control in step 23 and subsequent steps is performed (21). Alternatively, the predicted power R is greater than the reference power P _0, and the flag F is if there is also a reference power P set contents the target power P _{1 0} 1, the following demand control step 23 (21 , 22).

In the demand control, first, a register M is set in a register n (23), and It is determined whether or not the air conditioner corresponding to n is currently on (operating) (2).
4). Since M is initially set to 1 in step 5 described above, No. It is determined whether the first air conditioner is on. No. If the air conditioner of No. 1 is off, the register n is incremented by one (25), and It is determined whether the second air conditioner is on or not, and the same process is repeated to check whether the air conditioners for the number of points (eight air conditioners) are on until it is confirmed that any air conditioner is on. It is determined whether or not it is (26, 27). When it is confirmed that any of the air conditioners is turned on (step 13)
Therefore, the condition that the second target electric power P ₂ is larger than the control start electric power SW is satisfied, so that one of the air conditioners is turned on.) 28) If this number exceeds the score of 8, the original 1 is set in the register M (2
9, 30), the CPU 13 outputs the No. n of the air conditioner is forcibly turned off, and the load control time t input in advance
A return permission signal that is automatically turned on after a lapse of seconds is simultaneously transmitted (31). As described above, the current power P and the predicted power R associated therewith decrease as one air conditioner is turned off from on.

Next, the CPU 13 determines that the clock
It is determined whether minutes 00 seconds or 27 minutes 00 seconds have elapsed (3.
(2, 33) Unless 27 minutes and 00 seconds have elapsed, the process proceeds to step 35, and it is determined whether or not the 10-second timer TM has exceeded. When the 10-second timer TM is over, the processing of the above-mentioned steps 16 to 20 is repeated, and the predicted power R is larger than the reference power P ₀ and the flag F is not 1, or the predicted power R is If the set content of the reference power P ₀ is larger than the reference power P _{0 and} the set content of the reference power P ₀ is the target power P ₁ , the demand control of step 23 and thereafter is performed (21, 22), and the previous ON is performed. The air conditioner that is different from the air conditioner that was controlled to be turned off is forcibly controlled to be turned off, and a return permission signal that is automatically turned on after the elapse of the load control time t seconds is simultaneously transmitted (23 to 31). . As described above, the current power P and the predicted power R related thereto are further reduced due to the total of two air conditioners being turned off from on in addition to the air conditioners that were turned off last time.

That is, it is determined every 10 seconds whether demand control is necessary based on whether the predicted power R is greater than the reference power P ₀ (20 to 22), and if it is determined that demand control is required, , A predetermined control order (No. 1 → No. 2 →... → No. 7 → No.
8 → No. 1 → ..), a signal to control the operating air conditioner to be turned off and to automatically return after t seconds elapse is transmitted, and the next operating air conditioner until the predicted power R becomes equal to or less than the reference power P _0. Is turned off and a signal for automatically returning after t seconds has elapsed is transmitted.

Then, at step 33, the clock CT is set to 2
When it is determined that 7:00 seconds have elapsed, the flag F is set to 1
Is set (34), and then the clock CT sets 3
By the time 0:00, the predicted power R is equal to the reference power P
Greater than _0, and only if the set contents of the reference power P ₀ of the target power P _1, performs the following demand control (20 to 22). This is from 27 minutes 00 seconds to 30 minutes 00
In order to ensure the accuracy of the initial calculation for the next time period of 30 minutes, new control signals are not transmitted as much as possible within 3 minutes up to the second. Therefore, it is preferable that the load control time t is also within 3 minutes. Note that even if the clock device CT is 27
Even if the predicted power R exceeds the monthly target power P ₁ even after the lapse of the minute 00 seconds, if no control is performed, the peak value of the power consumption for one year may be exceeded. ₂ is greater than the target power P ₁ was controlled.

In step 32, the clock CT is set to 30 minutes 00.
When it is determined that the second has elapsed, the clock device CT is reset to 0 again.
Starting from minute 00 seconds (36), similar processing is performed. Further, the step 37 becomes uncontrolled and the second target power P ₂ is less than the control start power SW in step 13
When it is determined that the clock device CT has passed 30 minutes and 00 seconds, the clock device CT is started again from 0 minutes and 00 seconds (36), and the same processing is performed.

As described above, when the predicted power R exceeds the reference power P ₀ , the operating air conditioner is automatically turned off to reduce the power, thereby reducing the peak value of the used power especially in summer in the reference power P _0. The power consumption can be suppressed to the reference power P ₀ or less even in another next period, so that the power cost can be reduced comprehensively.

[0028] In this embodiment, the second target power P ₂ but was provided as breakwater Hisage target power P _1, in particular the second target power P ₂ to without providing the target power P ₁ as it is the reference power P Compared to the predicted power R every 10 seconds as ₀ , the predicted power R
Demand control (2 but described above with larger target power P ₁
3 to 31) may be performed. In this case, a new control signal is not transmitted as much as possible during the three minutes from 27:00 to 30:30 in order to ensure the accuracy of the initial calculation of the next time period of 30 minutes. No processing is performed.

[0029]

As described above, according to the demand monitoring control method of the first aspect, the predicted power is calculated from the current power, and the predicted power is compared with the target power for the current month set in the storage unit in advance. If the predicted power exceeds the target power, a signal to turn off the air conditioner is automatically sent to the air conditioner side instead of issuing an alarm as shown in the conventional example. And the predicted power also decreases. As a result, the power can be suppressed to the target power or less.

According to the demand monitoring control device of the second aspect, when the predicted power exceeds the target power, a signal for turning off one of the plurality of air conditioners and automatically returning after a predetermined time has elapsed is output to the air conditioner side. If the predicted power calculated next exceeds the target power, a signal is sent to the air conditioner to automatically turn off the next air conditioner that was turned off among the plurality of air conditioners and to automatically return after a predetermined time has elapsed. Control is repeatedly performed until the predicted power is equal to or less than the target power, so that the peak value of the power consumption can be suppressed to the target power or less particularly in the summer season, and the power consumption in the next period is also reduced to the target power of each month. Since it can be suppressed to the following, it is possible to comprehensively reduce the power cost. In addition, since the air conditioner is automatically turned off without requiring human resources, the burden on the consumer side is smaller than in the conventional example. Further, the air conditioners to be turned off are not the same air conditioners, but are turned off according to a predetermined sequence among a plurality of air conditioners, so that there is no particular problem with the circulation efficiency in the room.

According to the third aspect of the present invention, the second target power is set as a breakwater for the target power of the current month, which is the final target value. In addition to the effects, fine control can be performed, and power can be saved more efficiently.

Further, according to the fourth aspect of the present invention, the control unit determines whether or not the operating air conditioner among the plurality of air conditioners is smaller than a predetermined value. Since the control for turning off the air conditioner is not started, it is possible to prevent the control from being excessive, and it is possible to perform the control according to the actual operating condition of the air conditioner.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a schematic configuration of a demand monitoring control device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing processing contents of a CPU 13 shown in FIG.

FIG. 3 is a flowchart showing processing contents of a CPU 13 shown in FIG.

Figure 4 is a schematic diagram showing the relationship between the target power P ₁ and the second target power P _2, (a) is the target power P ₁ and the second target power P ₂
If:, (b) the second target power P ₂ shows a larger than the target power P _1.

FIG. 5 is a graph showing monthly changes in electricity usage.

6 is a graph showing the relationship between the predicted power R and the target power P ₁ per hour.

[Explanation of symbols]

 11 storage unit 12 ROM 13 CPU 16 operation display unit 100 demand monitoring control device 200 pulse oscillator 201 pulse detector No. 1 to No. 8 Air conditioner CT clock device TM 10 second timer

──────────────────────────────────────────────────続 き Continued on front page (51) Int.Cl. ⁶ Identification code FI H02J 3/00 H02J 3/00 A

Claims (4)

[Claims] 1. A signal from a pulse detector for detecting a pulse signal sent from a pulse generator of a meter for measuring electric energy of a power company is input, and a predicted power is calculated from a present power corresponding to the number of pulses per a certain time. Then, the predicted power is compared with the target power of the current month among the target powers for each month set in the storage unit in advance, and when the predicted power exceeds the target power, a signal to turn off the air conditioner is sent to the air conditioner side. A demand monitoring control method characterized by transmitting. 2. A demand monitor, wherein a pulse detector for detecting a pulse signal sent from a pulse oscillator of a meter for measuring electric energy of a power company and a switch function for controlling on / off of a plurality of air conditioners are connected to a control unit, respectively. The control device, wherein the control unit receives a signal from the pulse detector, calculates predicted power from current power corresponding to the number of pulses per fixed time, and sets the predicted power in the storage unit in advance. The target power for each month is compared with the target power for the current month, and when the predicted power exceeds the target power, one of the plurality of air conditioners is output.
One of the plurality of air conditioners is turned off, and a signal for automatically returning after a predetermined time elapses is transmitted to the air conditioner side.If the predicted power calculated next exceeds the target power, the next air conditioner turned off among the plurality of air conditioners is turned off. A demand monitoring and control device characterized in that a control for sequentially transmitting signals to be automatically turned off and automatically returning after a predetermined time elapses to the air conditioner side is repeatedly performed until predicted power becomes equal to or less than target power. 3. A demand monitor in which a pulse detector for detecting a pulse signal sent from a pulse generator of a meter for measuring electric energy of a power company and a switch function for controlling on / off of a plurality of air conditioners are connected to the control unit. A control device, wherein the control unit receives a signal from the pulse detector, calculates a predicted power from a current power corresponding to the number of pulses per fixed time in an initial stage, and calculates a predicted power based on the predicted power. 2) Calculate the target power and compare the second target power with the target power of the current month among the target powers for each month preset in the storage unit. If the second target power is larger than the target power, the target power is calculated. If the second target power is less than or equal to the target power, the second target power is set to the reference power, and then the signal from the pulse detector is input again, and To the number of pulses Calculating the predicted power from the corresponding current power, comparing the predicted power with the set reference power,
When the predicted power exceeds the reference power, a signal for turning off one of the plurality of air conditioners and automatically returning after a predetermined time elapses is transmitted to the air conditioner, and the predicted power calculated next exceeds the reference power. And a control of sequentially transmitting to the air conditioner a signal for automatically turning off the next air conditioner that has been turned off among the plurality of air conditioners and automatically returning after a predetermined time elapses, until the predicted power becomes equal to or less than the reference power. A demand monitoring control device characterized by performing. 4. The control unit determines whether an operating air conditioner among the plurality of air conditioners is smaller than a predetermined value, and if not, does not start control to turn off the air conditioner. The demand monitoring control device according to claim 2 or 3, wherein: