JP2001197662A - Power-calculating apparatus, power-calculating method and power information processing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a demand control technology, including a function to calculate amount of power and demand, which are actually reduced. SOLUTION: This power-calculating apparatus is provided with a demand controller main unit for monitoring amount of power used in the facilities to control the amount of used power into the range of the prescribed amount of power, an accumulated amount of power calculating unit 411 for calculating actual amount of used power through the control of the demand controller main unit within the prescribed period and a reduced amount of power- calculating unit 412 for collecting the compulsory stop period of a demand control object device within the predetermined period to calculate the amount of power used from the saving power due to stoppage of the demand control object device. Moreover, an actual accumulation maximum demand calculating unit 413 and a reduced maximum demand calculating unit 414 are also provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power calculation device and a power calculation device used in a demand control device for controlling a power load in a facility to suppress a power amount within a unit time period to a predetermined power amount. The present invention relates to a method and a power information processing system.

[0002]

2. Description of the Related Art An electric power company installs a transaction meter for a customer and measures and records the maximum demand power (maximum demand) in units of 30 minutes (referred to as "demand time period"). Since the basic rate of the electricity rate paid by the consumer is determined by the maximum demand, if this value can be kept low, the electricity rate will be reduced.

On the other hand, a demand control device has been developed for the purpose of compensating for the shortage of electricity supply capacity during the maximum power demand season in summer. The demand control device constantly monitors the demand power, continuously predicts the maximum demand power for each demand time period, and issues an alarm when there is a possibility that the contract power or the management target power will be exceeded. Then, according to a preset control method, the demand control target device is automatically shut off. Further, when there is a margin in the demand power with respect to the maximum supply power, the power is automatically restored.

[0004] As described above, the demand control device effectively utilizes the generated power by reducing the peak of the electric power.
This has the effect of reducing electricity bills for consumers and saving energy for both parties.

[0005]

However, while the conventional demand control device is effective for cost reduction, the actual savings can be determined before and after the demand control device is introduced. There is no other way but to compare costs. If it is possible to know for each meter reading how much the electricity bill is actually saved, it is possible to immediately know the cost saving effect of introducing the demand control device, but such a technology did not exist.

The problem to be solved by the present invention is to provide a demand control technique having a function of calculating an actual power consumption and an actually reduced power consumption. Here, the first aspect of the present invention is to provide an electric energy calculating apparatus capable of calculating an actual electric power consumption and an actually reduced electric energy to calculate the reduced electric energy. It is still another object of the present invention to provide an electric energy calculating apparatus capable of calculating an actual electric power consumption and an actually reduced electric energy to calculate a reduction of a basic charge. Another object of the present invention is to provide a power calculation method capable of calculating an actual power consumption and an actually reduced power to calculate the reduced power. Another object of the present invention is to provide a method of calculating the amount of power that can calculate the reduction of the basic charge by calculating the actual amount of power consumption and the actually reduced amount of power. Another object of the present invention is to provide a power calculation apparatus including means for transmitting reduced power information to an information processing apparatus that performs predetermined processing according to the reduced power. Another object of the present invention is to provide an electric energy calculation apparatus including means for transmitting reduced maximum demand information to an information processing apparatus that performs predetermined processing according to the reduced demand. Another object of the present invention is to provide a power information processing system for performing predetermined processing on the reduced power amount information or the reduced maximum demand information by using an information processing device. An eighth aspect of the present invention is to provide a power amount information processing system for calculating the usage charge of the demand control device main body using the reduced power amount information or the reduced maximum demand information by using an information processing device. .

[0007]

In order to achieve the above object, the following technique is provided. According to the first aspect of the present invention, the amount of power used within a unit time period falls within a preset range of the amount of power by load control for monitoring the amount of power used in the facility and forcibly stopping the demand control target device. By the demand control device body to be controlled, an actual power consumption calculation unit that calculates the actual power consumption within a predetermined period under the load control, and the forced stop time within the predetermined time of the demand control target device, And a reduced power calculating unit configured to calculate a reduced power from the power reduced by the load control of the demand control target device.

According to a second aspect of the present invention, the amount of power used within a unit time period is kept within a preset range of power by load control for monitoring the amount of power used in the facility and forcibly stopping a device to be demand-controlled. The actual power consumption calculation unit that calculates the power consumption within the unit time period under the load control by the demand control device main body that controls the power consumption so as to be contained, and the power consumption calculated by the actual power consumption calculation unit. In the actual maximum demand calculation unit that calculates the highest actual maximum demand, the power is reduced from the forced stop time of the demand control target device within a unit time period and the power reduced by the load control of the demand control target device. A reduced maximum demand calculation unit that calculates the largest amount of reduced demand among the reduced demands within a predetermined period, According to that electric energy computing device.

According to a third aspect of the present invention, the power consumption within a unit time period is kept within a preset power amount by load control for monitoring the power consumption in the equipment and forcibly stopping the demand control target device. An actual power consumption calculation procedure for calculating an actual power consumption within a predetermined time period under the load control, according to a demand control procedure for controlling the power consumption to be settled, and the forced stop of the demand control target device within the predetermined time period The present invention relates to a power amount calculating method including a reduced power amount calculating procedure for calculating a reduced power amount from time and power reduced by load control of the demand control target device.

According to a fourth aspect of the present invention, the amount of power used within a unit time period falls within a preset range of the amount of power by monitoring the amount of power used in the facility and performing load control for forcibly stopping a device to be demand-controlled. According to a demand control procedure for controlling to be settled, an actual power consumption calculation procedure for calculating the power consumption within a unit time period under the load control, and a power consumption calculated by the actual power consumption calculation procedure. The actual maximum demand calculation procedure of calculating the highest actual maximum demand, the forced stop time of the demand control target device within a unit time period, and the power reduced by the load control of the demand control target device are reduced. A reduced maximum demand calculation procedure for calculating the amount of power and calculating the largest reduced maximum demand among the reduced demands within a predetermined period. According to obtain electric energy calculation method.

According to a fifth aspect of the present invention, the amount of power used within a unit time period is kept within a predetermined range of power by load control for monitoring the amount of power used in the facility and forcibly stopping the demand control target device. An actual power consumption calculator for calculating an actual power consumption within a predetermined period under the load control by the demand control device main body that controls to be settled, and the forcible operation of the demand control target device within the predetermined time. The stop time and the reduced power calculation unit that calculates the reduced power from the power reduced by the load control of the demand control target device, and the reduced power information calculated by the reduced power calculation unit, The present invention relates to a power calculation device comprising: a transmission unit for transmitting to a provider of the demand control device main body.

According to a sixth aspect of the present invention, the amount of power used within a unit time period is kept within a preset range of the amount of power by monitoring the amount of power used in the equipment and forcibly stopping the demand control target device. The actual power consumption calculation unit that calculates the power consumption within the unit time period under the load control by the demand control device main body that controls the power consumption so as to be contained, and the power consumption calculated by the actual power consumption calculation unit. In the actual maximum demand calculation unit that calculates the highest actual maximum demand, the power is reduced from the forced stop time of the demand control target device within a unit time period and the power reduced by the load control of the demand control target device. A reduced maximum demand calculating unit that calculates the largest amount of reduced demand among the reduced demands within a predetermined period, Reduced maximum demand information calculated by reducing the maximum demand calculation unit, according to the power amount calculation unit and a transmission means for transmitting to the providing entity of the demand control apparatus main body.

According to a seventh aspect of the present invention, the power amount calculating device according to the fifth or sixth aspect is owned by a user, and is held by a provider of a demand control device main body and transmitted from a transmission unit of the power amount calculating device. With receiving means for receiving reduced power amount information or reduced maximum demand information,
An information processing apparatus for performing predetermined processing on the received reduced power amount information or the reduced maximum demand information.

According to an eighth aspect of the present invention, in the power information processing system according to the seventh aspect, the information processing apparatus uses the information based on the reduced power amount information or the reduced maximum demand information received by the receiving means. Charge calculation for calculating the difference between the electricity charge required before the introduction of the demand control device main body required in the equipment owned by the user and the electricity charge after the introduction, and calculating the usage fee for the demand control device main body based on the difference The present invention relates to a processing system for electric energy information, comprising a unit.

According to a first aspect of the present invention, there is provided a power consumption calculating apparatus for controlling a demand control target device by a demand control device main body to reduce a maximum demand while providing a power consumption calculating unit. Calculates the actual power consumption after the demand control device is introduced, and the reduced power calculation unit calculates the reduced power amount due to the demand control device introduction.

The use when demand control is not executed based on the reduced power amount obtained by the reduced power amount calculation unit and the actual power consumption amount (actual power consumption amount) obtained by the actual power consumption amount calculation unit. The power amount can be predicted and calculated.
Further, by multiplying the reduced power amount by the unit price of the power, the reduced amount of the power rate can be obtained. Naturally, it is also possible to provide a device that can calculate up to the amount of reduction in the electricity fee.

According to a second aspect of the present invention, there is provided an electric energy calculating apparatus according to the first aspect of the present invention, wherein the maximum demand is reduced by controlling the demand control target device by the demand control device itself. The actual maximum demand by the introduction of the demand control device is calculated, and the reduced maximum demand calculation unit calculates the maximum reduced demand by the introduction of the demand control device. From the actual maximum demand and the reduced maximum demand, the maximum demand (predicted maximum demand) when the demand control is not executed can be predicted and calculated. By calculating the maximum reduction demand, it is possible to notify the reduction of the basic electricity rate.

According to the fifth and sixth aspects of the present invention, the power amount calculating device can transmit the reduced power amount information or the reduced maximum demand information to the information processing device by the transmitting means. Therefore, if an information processing device capable of receiving the above information is possessed, the reduced power amount and the maximum demand can be grasped without directly checking with the demand control device main body.

According to a seventh aspect of the present invention, there is provided a power amount information processing system, wherein reduced power amount information or reduced maximum demand information is received by an information processing device, so that the reduced power amount information is not directly confirmed by a demand control device body. The amount and the maximum demand can be grasped, and various processes can be performed on such information.

[0020] In the power information processing system according to the present invention, when the reduced power amount information or the reduced maximum demand information is received by the information processing apparatus, the usage fee calculating unit may
It is possible to extremely easily calculate a usage fee (lending fee) that reflects the introduction results of the demand control device main body.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a demand control device provided with an electric energy calculation device according to the present invention will be described.
This will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of the demand control device of the first embodiment. The demand control device 1 monitors the power consumption of the power load in the facility and performs load control by forcibly stopping the demand control target device so that the demand control device 1 falls within a range of a predetermined power amount within a unit time period. This controls the amount of power used.

FIG. 1 exemplifies an air conditioner as a demand control target device. This is because the number of installed devices and the amount of load power are large, and the influence of short-time interruption is small, so that the device is suitable as a demand control target device. In addition, in FIG.
Although only the units are shown, usually a plurality of units are to be controlled.

First, the configuration of the demand control device body will be described. The main body of the demand control device includes a sensor 2 for detecting an electric energy, a pulse converter 3,
It includes a demand controller 4 which is an electric energy calculation device, and an electromagnetic contactor 5 for controlling ON / OFF of a demand control target device.

The demand controller 4, which is an electric energy calculation device, has a central processing unit (CPU) (not shown) and a memory (not shown), and a programmable controller (hereinafter, referred to as PLC) 41 which is programmable and inputs various parameters to the PLC. And an output relay 43 for outputting an ON / OFF signal of the demand control target device according to an output signal of the PLC 41.

The PLC 41 includes an actual power consumption calculating section 411 which is a feature of the present invention, and a reduced power calculating section 41.
2, an actual maximum demand operation unit 413, and a reduced maximum demand operation unit 414.

In the facility, there is provided a transaction power meter 101 installed by a power company on a power line for supplying power.
The transaction power meter 101 is provided with a power amount detection sensor 2 with the permission of the power company. The signal output from the detection sensor 2 is input to the pulse converter 3,
It is converted to KWH / pulse by the pulse converter 3 and PW
Output to LC41. KWH per pulse is set by the pulse converter 3.

The air conditioner is divided into an indoor unit 102 and an outdoor unit 103. The outdoor unit 103 includes a compressor motor 104 and a compressor motor control relay 106 for controlling ON / OFF of the compressor motor 104, which are controlled by a controller 105 in the outdoor unit. An electromagnetic contactor 5 for forced ON / OFF control, which is forcibly turned ON / OFF according to an instruction from the controller 4, is provided.

In the PLC 41 of the demand controller 4, a target power, a power amount prediction program in a unit dimension, and a load stop-load restart program are set in advance.
The PLC 41 transmits a compression motor ON / OFF signal Y1 to the electromagnetic contactor 5 via the output relay 43, and the electromagnetic contactor 5 transmits the compression motor ON / OFF signal Y1 to the compressor motor 1 by the signal Y1.
04 is turned ON / OFF.

On the other hand, the controller 105 of the outdoor unit 103
Thereafter, the signal X1 of the contact signal of the compressor motor control relay 106 is transmitted to the PLC 41. This signal X1
Is a start or stop signal of the compressor motor. For example, when the air conditioner is performing a cooling or heating operation and the compressor motor 104 is operating, the X1 signal is an ON signal indicating that the air conditioner is operating.

The PLC 41 synchronizes the measurement time of the unit time period (30 minutes) with the monitoring time from the pulse signal received from the pulse converter 3 and arrives at the end of the time period while monitoring the current power consumption within the time period. Calculate the predicted power demand. When it is predicted that the predicted demand power exceeds the target power (contract power) at the end of the unit time period, an alarm signal is output, and a signal Y1 is transmitted via the output relay 43 according to a load stop-load restart program, The compressor motor 104 of the air conditioner is forcibly stopped via the electromagnetic contactor 5.

When the maximum power has a margin, the alarm is released, the signal Y1 is transmitted, and the compressor motor 104 is started again.

FIG. 2 is a time chart for explaining a method for obtaining the reduced power amount. here,
(A): ON / OFF operation of the air conditioner in cooling or heating operation.
The time during which it is OFF is shown. (B) shows ON / OFF time of the compressor motor control relay 106, that is, ON / OFF of the compressor motor.
(C) shows ON / OFF of the signal Y1, and indicates a time when the demand controller 4 transmits a signal for forcibly turning off the compressor motor 104 in order to keep the electric energy within a predetermined electric energy. .

Of the three ON signals C1, C2 and C3 shown in FIG. 2, the (B) compressor motor is ON.
The compressor motor is forcibly stopped by the ON signals of C1 and C3, which overlap with the operating time. for that reason,
The actual operation of the compressor motor 104 is as shown in FIG. That is, in (D), the signal X1 for operating the compressor motor by the air conditioner itself is ON, and the compressor motor stop signal Y1 from the demand controller is OFF,
That is, the electromagnetic contactor 5 is turned on, and the compressor motor 10
Reference numeral 4 indicates the operation time.

(E) shows a period during which the compressor motor 104 is forcibly stopped. The signal X1 for operating the compressor motor by the air conditioner itself is an ON signal, but the compressor motor stop signal Y1 from the demand controller is an ON signal. Among the times when the compressor motor is stopped, there is a time when the compressor motor 104 is stopped without being controlled by the demand controller. E1 and E
3 indicates the time during which the amount of power is reduced.

(F) shows the total (6 minutes in the figure) of the compressor motor forced stop period. If the data is collected for one month, the one-month forced stoppage time of the compressor motor is obtained. At that time, turn the compression motor
By multiplying the amount of saved power in the case of FF, it is possible to obtain the amount of saved power for the motor for the compressor for one month, that is, the reduced amount of power.

The actual power consumption calculator 411 of the PLC 41
Monitors the pulse signal output from the pulse converter 3 and calculates the actual power consumption (actual power consumption) under the control of the demand control device body for one month.

A method of calculating the actual power consumption by the actual power consumption calculation unit 411 will be described with reference to the flowchart of FIG. First, it is determined in step 301 whether a pulse signal from the pulse converter 3 has been received, and if so, the integration counter A is incremented in step 302. After incrementing the integration counter A or when no pulse signal is received, it is determined in step 303 whether the integration end set time is reached. If it is not the integration end set time, the process returns to the beginning and continues counting the power consumption. In the case of the integration end set time, since the power amount totaling month has changed, the actual power usage amount for one month is obtained in step 304 using the following equation (1), and stored in the register B in step 305. . Then, in step 306, the accumulation counter A is cleared to zero, and measurement of the actual power consumption in the next month is started.

Actual power consumption (KWH) for one month = integrated pulse number (value of integrating counter A) × pulse rate (KWH / pulse) (1)

Power KW per pulse of pulse signal
H is set by the pulse converter 3, for example, 2KW
When H / pulse is set, if the integration result of the pulses for one month is 25,000 pulses, the actual power consumption for one month is 50,000 KWH.

The start and end of the monthly integration (set time of the integration end) are adjusted to the meter reading date of the power company. For example, if the meter reading date is 3rd of every month, the integration starts at 0:00 am on the 3rd and ends at 24:00 on the 2nd of the next month.

The actual power consumption for each month is stored for one year. That is, the current month and the past 11 months for one year are stored.

Next, a method of calculating the reduced power in the reduced power calculator 412 will be described with reference to the flowchart of FIG. First, as shown in FIG.
01 is a signal X indicating that the air conditioner itself operates the compressor motor.
1. When both the compressor motor stop signal Y1 from the demand controller is ON, the compressor motor has been forcibly stopped. If the timer AA has not started, the timer AA is started in step 402. And the time during which the compressor motor is forcibly stopped is measured.

Next, at step 403, the signals X1 and Y
If any one of them is turned off and the timer AA has started, the timer AA is stopped in step 404. In step 405, the value of the timer AA is added to the integration counter BB. In step 406, the timer AA is cleared to zero. In step 407, when the integration end set time is not reached, the total stoppage time of the compressor motor is counted. to continue. When the integration end time is reached,
Step 408 because the power total month has changed.
If the timer AA has started in step 4,
In step 09, the value of the timer AA is added to the integrating counter BB, and in step 410, the timer AA is cleared to zero, and the forced stop time of the compressor motor for the next month is newly calculated.

Then, the following equations (2) and (3) using the power saved when the compressor motor is turned off in step 411 (compressor motor OFF save power).
And the result (monthly reduced power) is stored in the register CC. The monthly reduced power is stored for one year.
That is, the current month and the past 11 months are stored.

The amount of reduced electric power for one month per air conditioner (KWH) = cumulative forced stoppage time (H) of compressor motor (value of integrated counter BB) × compressor motor OFF save power (KW) …… (2)

One month's reduced power (KWH) = addition of one month's reduced power (KWH) per air conditioner to the total number of air conditioners (3)

The motor OFF save power for the compressor is:
It is not simply the rated capacity (KW) of the motor. Usually, the rated capacity of the compressor motor is described on the nameplate of the air conditioner, but the compressor motor is incorporated in the same housing together with the compressor, and is cooled by a refrigerant (for example, Freon). Therefore, the motor can withstand an overload, and has a power reduction effect of KW or more described on the nameplate.

Although the actual reduced power (KW) differs strictly depending on the manufacturer and model of the air conditioner, even though the rated capacity (KW) of the compressor motor is the same, the actual reduced power (KW) is about 1.2 to less than the rated capacity of the motor. 1.5 times. Therefore, as the compressor motor OFF save power, 1.35 which is the average value of 1.2 to 1.5 times is used, and the rated capacity (KW) × 1.3 is used.
5 and a method of confirming the power that can be actually saved with the manufacturer. The compressor motor OFF save power is input to the PLC 41 by the digital switch 42 in advance.

The amount of reduction in the power consumption is calculated by the amount of reduced power (K
WH) is multiplied by the power unit price (yen / KWH). However, the power unit price differs between the summer season (3 months of July, August, and September) and other seasons. Therefore, the annual reduction amount tally is calculated for the summer and the other seasons as shown in the following Expression (4) and Expression (5) as Expression (6).

Summer reduced power rate (yen) = summer reduced power rate (KWH) × unit price (yen / KWH) (4) Other season reduced power rate (yen) = other season reduced power quantity (KWH) × Unit price (yen / KWH)… (5)

Total amount of annual reduction (yen) = calculation result of equation (4) + calculation result of equation (5) (6)

The expected power consumption (KWH) for one month when the demand control is not performed is obtained by the following equation (7).

Predicted power consumption (KWH) for one month = reduced power consumption (KWH) for one month + 1 actual power consumption (KWH) for one month (7)

It is easy for the consumer to understand the method of showing the predicted power consumption and the actual power consumption, and displaying the value obtained by subtracting the actual power consumption from the predicted power consumption as the reduced power consumption.

The demand control device 1 calculates demand by controlling the demand control device within the demand time period by the actual maximum demand calculation unit 413 while executing demand control by the demand control device main body. Of the maximum demand (KW) having the largest value among the actual demands (actual monthly maximum demand), and further, the reduced maximum demand calculation unit 414 forcibly stops the demand control target device within the demand time period. Then, the reduced demand is calculated from the saved power due to the stop of the demand control target device, and the reduced monthly maximum demand having the largest value among the reduced demands for one month is calculated.

The contract power is determined to be the largest value among the maximum demands between the current month and the past 11 months. Therefore, the annual basic charge is reduced by lowering the maximum demand by introducing the demand control device. The annual basic charge is calculated by the following equation (8), and the basic charge reduction amount is calculated by the following equation (9).

Annual basic charge (yen) = contracted power (KW) × unit price (yen / KW) × (1.85−power factor) × 12 months (in the case of Chugoku Electric Power Co., Ltd.) (8)

Basic charge reduction amount (yen) = {predicted maximum demand (KW) −actual maximum demand (KW)} × basic charge unit price (yen / KW) (9)

However, the actual calculation of the basic charge is based on the new contract power determined with the power company when the demand controller is introduced (the power company is offered to suppress the maximum demand to a certain value or less by introducing the demand controller). And determine the new contract power). for that reason,
The actual basic charge reduction amount is calculated based on the difference (KW) between the new contract power and the old contract power before the introduction of the demand controller. Therefore, the reduction amount calculated from the predicted maximum demand is a reference value.

The demand is calculated by the following equation (10) by measuring the power consumption. As can be seen from the following equation, the demand value is a value obtained by doubling the amount of power used for 30 minutes.

Demand (KW) = power consumption for 30 minutes (KWH) ÷ 0.5 (H) = power consumption for 30 minutes (KWH) × 2 (10)

First, a method of calculating the actual maximum demand in the actual maximum demand calculating section 413 will be described with reference to the flowchart of FIG. If a pulse signal is received from the pulse converter 3 in step 501, the accumulation counter EE is incremented in step 502.

If no pulse signal is received, or after the integration counter EE is incremented, step 50
In step 3, it is determined whether the demand time period (30 minutes) has ended. If it has ended, in step 504, the following equation (11) is used.
Is used to calculate the demand in units of 30 minutes.

Demand (KW) = integrated pulse number (value of integrating counter EE) × pulse rate (KWH / pulse) × 2 (11)

Since the demand is in units of 30 minutes, the power consumption (KWH) is also integrated in units of 30 minutes. The integration is performed every 30 minutes, and the start and end of the integration are synchronized with the demand time period set in the transaction power meter of the power company. In addition, the time is also adjusted to the time of the transaction wattmeter of the power company.

Next, at step 505, it is determined whether or not the current value calculated by the equation (11) is larger than the previous value.
If it is larger, the value of the register FF is rewritten with the current value in step 506. Then, in step 507, the accumulation counter EE is cleared to zero, and a demand in a new demand time period is obtained. Thereafter, it is determined in step 508 whether or not it is the calculation end set time.
Since the demand calculation month has changed, step 50
At step 9, the value of the register FF is stored in the register GG, and at step 510, the register FF is cleared to zero.

The value stored in the register GG is the actual monthly maximum demand of the last month. If the calculation end set time has not come in step 508, the process returns to the beginning to obtain a demand. The start and end of the monthly calculation are adjusted to the meter reading date of the power company. For example, if the meter reading date is 3rd of every month,
The calculation starts at 0:00 on the third day,
The calculation ends at 4:00.

The actual monthly demand is stored for one year.
That is, the current month and the past 11 months for one year are stored.
Among the stored maximum demands for the current month and the past 11 months, the largest value is the actual annual maximum demand.

Next, a method of calculating the reduced maximum demand in the reduced maximum demand calculating section 414 will be described with reference to the flowchart of FIG. The reduced maximum demand is also calculated in units of 30 minutes, similarly to the actual maximum demand. In FIG. 1 to N are shown, and the flowchart is No. Although the processing for one air conditioner is shown as a representative, steps 601 to 6 are performed for all air conditioners.
No. to 12 The same processing as that of the first air conditioner is performed.

First, in step 601, if both the signal X1 for operating the compressor motor by the air conditioner itself and the compressor motor stop signal Y1 from the demand controller are ON and the timer AA-1 has not started, Step 6
At 02, the timer AA-1 is started, and the time during which the compressor motor is forcibly stopped is measured.

If either the signal X1 or the signal Y1 is turned off at step 603 and the timer AA-1 is started, then at step 604, the timer AA-1 is turned off.
To stop. Then, in step 605, the timer AA
The value of -1 is added to the accumulation counter BB-1, and in step 606, the timer AA-1 is cleared to zero.

At step 607, it is determined whether or not the demand time period has ended. If not, at step 618, it is determined whether or not the calculation end time has elapsed. If not, step 601 has occurred. And the measurement of the timer AA-1 is continued.

If the demand time period has ended in step 607 and the timer AA-1 has started in step 608, the timer A
The value of A-1 is added to the accumulation counter BB-1, and the timer AA-1 is cleared to zero in step 610. Then, in step 611, the amount of reduced power (KWH) per air conditioner for 30 minutes is calculated and stored in the register CC-1 using the following equation (12).

No. for 30 minutes No. 1 air conditioner reduced power (KWH) = compressor motor forced stop time within demand time period (30 minutes) (value of integrated counter BB-1) × No. 1 Compressor motor OFF save power (KW) ... (12)

As described above, the compressor motor OFF save power is determined not by the rated capacity of the compressor but by the rated capacity (KW) × 1.35 and the method of confirming the power that can be actually saved to the manufacturer. There are two types.

Thereafter, at step 612, the integrating counter BB-1 is cleared to zero. To compile the amount of reduced power (KWH) per air conditioner for 30 minutes for each air conditioner,
In step 613, No. Register CC-1, No. 1, which is the value of the reduced power amount of the air conditioner for 30 minutes. 3 of 2 air conditioners
Register CC-2, which is the value of the reduced electric energy for 0 minute,
··· Calculate up to the register CC-N, which is the value of the reduced power amount of the Nth air conditioner for 30 minutes, and store it in the register L.

The value stored in the register L is the reduced power amount (KW) of all air conditioners within the demand time period (30 minutes).
H). Further, in step 614, the following expression (1)
According to 3), the reduced demand (KW) is calculated.

Reduced demand (KW) = reduced power (KWH) of all air conditioners within the demand time period (30 minutes) × 2 (13)

The reduced demand calculated in step 615 is compared with the previously calculated reduced demand stored in the register FF-1, and if the reduced demand calculated this time is larger than the previous value, the register FF- is calculated in step 616.
The value of 1 is rewritten with the value obtained this time. Then, in step 617, the registers CC-1 to CC-N and the register L are cleared to zero, and the next reduced demand of the demand time period is obtained.

When the calculation end time is reached in step 618, the demand calculation date has changed, so that the value of the register FF-1 is stored in the register GG-1 in step 619, and the value of the register GG-1 is stored in step 620. The register FF-1 is cleared to zero.

The value stored in the register GG-1 is the reduced monthly maximum demand of the last month. The start and end of the monthly calculation are adjusted to the meter reading date of the power company. For example, if the meter reading date is 3rd of every month, the calculation is started at 0:00 am on the 3rd, and the calculation is ended at 24:00 on the 2nd of the next month. Further, the maximum demand in the reduction month is stored for one year. That is,
The current month and the past 11 months for one year are stored.

A value obtained by adding the actual monthly maximum demand for each month and the reduced monthly maximum demand is a predicted monthly maximum demand when demand control is not performed. Among the stored maximum demands in the reduced month between the current month and the past 11 months, the largest value is the reduced annual maximum demand (KW). In addition, predicted annual maximum demand (KW) = reduced annual maximum demand (KW) + actual annual maximum demand (KW).

FIG. 7 shows an example of the actual demand and the reduced demand for each of the past 11 months and the current month. In FIG. 7, the demand in August is the predicted maximum demand in the year,
Normally, the basic electricity rate is determined by the demand in August. However, the introduction of the demand control device has resulted in the actual demand (demand control target value).
It can be recognized that the reduction was achieved.

Tables 1 and 2 show the results when the demand control device was actually introduced. Table 1 shows the contract power and the annual power consumption before and after the introduction.
Table 2 shows the maximum demand and power consumption for each month.

[0086]

[Table 1]

[0087]

[Table 2]

In the demand control device according to the present embodiment, the reduced power amount calculation unit counts the time of the forced stop of the demand control target device every month, and calculates the reduced power amount from the saved power due to the stop of the demand control target device. Therefore, it is possible to know the effect of reducing the amount of power by introducing the demand control device on a monthly basis.

In addition, since the actual power consumption calculation unit calculates the actual power consumption that has been subjected to monthly demand control, the predicted power consumption obtained by adding the reduced power consumption to the actual power consumption can be known every month. it can. In addition, the reduced maximum demand calculation unit calculates the reduced demand from the forced stop time of the demand control target device within the demand time period and the saved power due to the stop of the demand control target device, and calculates the reduction month with the largest value of the monthly reduction demand. Since the maximum demand is calculated, the effect of reducing the basic rate of the electricity rate can be specifically known.

In addition, the actual maximum demand calculating section calculates the actual monthly maximum demand having the largest value among the actual monthly demands from the power consumption within the demand time period under the control of the demand control device main body. By adding the monthly maximum demand and the actual monthly maximum demand, the predicted monthly maximum demand can be obtained.

Next, a second embodiment of the demand control device according to the present invention will be described. FIG.
It is a block diagram showing composition of demand control device 1b of an embodiment. This demand control device 1b
Is a configuration in which the signal X1 of the contact signal of the compressor motor control relay 106 transmitted from the controller 105 of the outdoor unit 103 of the air conditioner to the PLC 41 in the first embodiment is unnecessary. This signal X1 is supplied to the compressor motor 10
4 is a run or stop signal.

Since the signal X1 is not required, the wiring between the controller 105 of each air conditioner and the PLC 41 becomes unnecessary, and the modification of the air conditioner becomes unnecessary. Therefore, it is possible to provide the demand control device at low cost.

As the signal X1 becomes unnecessary, the PLC 41 of the demand controller 4 which is a power amount calculating device is used.
The configuration differs from that of the first embodiment in that it includes an actual power consumption calculator 411, a second reduced power calculator 415, an actual maximum demand calculator 413, and a second reduced maximum demand calculator 416. .

The actual power consumption calculation unit 411 and the maximum demand calculation unit 423 are the same as those in the first embodiment, but the second reduced power calculation unit 415 and the second reduced maximum demand calculation unit 416 are the same as those in the first embodiment. It is different from the form. Other configurations such as the demand control device 1b and the air conditioner are the same as those of the first embodiment, and therefore, the same components are denoted by the same reference numerals and description thereof will be omitted.

The second reduced power amount calculating section 415 is used to calculate the actual used power amount per unit time calculated by the actual used power calculating section 411 and the actual used power amount calculating section 411 when the compressor is forcibly stopped. The difference from the calculated actual power consumption per unit time is calculated, and the reduced power consumption is calculated by multiplying the difference by the time during which the compressor is forcibly stopped.

The operation of the second reduced power calculation unit 415 will be described with reference to the flowchart of FIG.

First, the second reduced power calculation unit 415 always checks the actual power consumption per unit time calculated by the actual power consumption calculation unit 411 in step 901.
Then, in step 902, it is determined whether or not the signal Y1 has been turned ON. Since the ON of the signal Y1 is a signal for forcibly stopping one of the compressors, the actual power consumption per unit time immediately before the signal Y1 is transmitted in step 903 is stored. Further, from the transmission of the ON signal of the signal Y1 in step 904, the integration of the power consumption calculated by the actual power consumption calculator 411 and the measurement of the time during which the signal Y1 is ON are started.

Then, at step 905, the signal Y1 becomes OF
F, the signal Y1 is turned off, and when the signal Y1 is turned off, in step 906, the integration of the power consumption calculated by the actual power consumption calculator 411 is stopped, and the signal Y1 is turned off.
The time when 1 was ON is stored.

Next, at step 907, the reduced power amount is calculated. The time when the Y1 signal is ON is represented by T,
Δ is the power consumption per unit time immediately before 1 is transmitted.
Assuming that P is the integrated value of the power consumption during the time when the ON signal P1 and the signal Y1 were transmitted, the reduced power is obtained by the following equation (14).

(ΔP−P / T) × T (14)

Then, the reduced power amount calculated in step 908 is integrated until the set integration end time (monthly meter reading). Thereafter, it is determined in step 909 whether or not it is the calculation end set time. If it is the calculation end set time, since the power totaling month has changed, the reduced power amount of that month integrated in step 910 is stored in a register, Further, in step 911, the register storing the integration of the reduced power is cleared to zero, and the integration of the reduced power for the next month is started.

As described above, in the demand control device 1b of the second embodiment, since the operation state of each compressor cannot be grasped, the change in the amount of power before and after the transmission of the signal Y1 and the time when the signal Y1 was transmitted are not considered. Obtain the reduced power amount.

Therefore, the second reduced power calculation unit 415 cannot directly grasp the operation status of each compressor, but
It is possible to estimate. Hereinafter, a method of determining the operating status of each compressor, that is, whether the motor control relay for the compressor is ON, in other words, whether the signal X1 is ON or not will be described. In this case, the second reduced power calculation unit 41
In 5, save power of each demand target device is input in advance.

First, a time after a predetermined time from when the signal Y1 is turned on is ΔT2, and the actual power consumption is calculated during a predetermined period before the forced stop signal Y1 is output (the same time as the ΔT2 time, ΔT1). The actually used power amount calculated by the unit 411 is P1, and the actually used power amount calculated by the used power amount calculation unit 411 during the time ΔT2 is P2. Further, the total power amount (scheduled reduction power amount) of the compressor to which the forced stop signal Y1 has been transmitted during the time ΔT2 is set to P3. The second reduced power calculation unit 415 calculates the value of the actual reduced power (P1−P2) and the planned reduced power P
3, the operating state of the compressor is determined as follows, for example.

(1) If P1−P2> P3 ± α, the amount of reduction in the total amount of power is the amount of reduction in the total amount of power of the compressor to which the forced stop signal Y1 has been transmitted (the amount of power P3 to be reduced). In this case, it is determined that all the signals X1 of the controlled devices are ON. Here, α is an allowable value, and 1
About 0% is appropriate. The allowable value is provided because the air conditioner other than the demand target device to which the signal Y1 was transmitted is turned on / off during the time ΔT2, or the power load other than the air conditioner such as an elevator is turned on / off. It is.

(2) In the case of P1−P2 = P3 ± α, the amount of reduction in the actual amount of power matches the amount of power to be reduced. It is determined that they are all ON.

(3) In the case of P1-P2 <P3 ± α, although the electric energy has been reduced, it is smaller than the scheduled reduction electric energy P3 of the forcibly stopped compressor. The signal X1 has ON and OFF. Therefore, the ON state of the signal X1 is represented by the following equation (15).

(P1−P2) / P3 × 100 (%) (15)

(4) If P1−P2 = 0 ± α, it means that the power amount has not been reduced, and it is determined that all the signals X1 of the controlled compressor are OFF.

(5) If P1−P2 <0 ± α, it means that there is no effect of forcibly stopping, and it is determined that all the signals X1 of the controlled compressor are OFF.

For example, as a first example, a compressor stop command Y1 for a plurality of air conditioners (A group) is output for 3 minutes (ΔT2), and the total scheduled reduction power of the A group air conditioners for 30 minutes is reduced. The case where the amount P3 is 25 KW is taken as an example.

Three minutes before outputting signal Y1 (ΔT1)
Of the actual power consumption P1 after the signal Y1 is output.
Minute (ΔT2), the difference (P1−P
Assume that 2) is 1.5 KW. Scheduled reduction in electric energy (P
3) When 25 KW is converted into 3 minutes, 25 KW × 3 minutes /
30 minutes = 2.5 KW. The actual reduction amount with respect to the scheduled reduction power amount P3 is 1.5 KW / 2.5 KW × 100 =
60%. Therefore, 60% of the compressors in the A group are ON, and 40% of the compressors are OFF.

As a second example, a plurality of air conditioners (B
Group)) for 3 minutes (ΔT
2) An example in which the output and the reduced scheduled electric energy P3 of the air conditioners of group B for 30 minutes is 31 KW is taken as an example.

Three minutes before outputting signal Y1 (ΔT1)
Of the actual power consumption P1 after the signal Y1 is output.
Minute (ΔT2), the difference (P1−P
Assume that 2) is 3.0 KW. Scheduled power consumption 31
When KW is converted into 3 minutes, 31KW × 3 minutes / 30 minutes =
3.1 KW. Assuming that the allowable value α is 10%, P1-
This applies to P2 = P3 ± 10%. Therefore, it is determined that the signals X1 of the compressors in the B group are all ON.

In the demand control device 1b of the second embodiment, the operating condition of each air conditioner cannot be directly grasped, but the operating condition of each air conditioner is estimated by estimating the operating condition of each air conditioner as described above. Grasp and show to consumers.

The calculation of the reduced maximum demand in the second reduced maximum demand calculating section 416 calculates the reduced demand in units of 30 minutes in the same manner as the calculation of the reduced power amount. If the demand is larger than the demand, the previous demand is rewritten with the current demand, and if the current demand is smaller than the previous demand, the operation to maintain the value of the previous demand is performed monthly. The maximum demand can be calculated.

The present invention is not limited to the above embodiment. For example, a transmission unit that can transmit the reduced power amount and / or the reduced monthly maximum demand (reduced maximum demand) obtained from the reduced power amount calculation unit and / or the reduced maximum demand calculation unit may be provided. According to this, the effect of introducing the demand control device main body from the reduced amount of power and the like can be obtained by the information processing device having the receiving means installed at a remote position without directly confirming the demand control device main body. You can figure out.

Further, necessary processing can be performed using the power amount information received by the information processing apparatus, that is, the reduced power amount information and / or the reduced monthly maximum demand (reduced maximum demand) information. For example, when a user introduces a demand control device main body under a lease contract and the provider (lender) of the demand control device main body owns this information processing device, the information processing device includes a usage fee calculation unit. By setting this, it is possible to easily calculate a usage fee (lending fee) commensurate with the introduction results. In other words, the usage fee calculation unit can calculate the difference between the electricity fee before the introduction of the demand control device main body required in the equipment owned by the user and the electricity fee after the introduction, and based on this difference, The usage fee of the demand control device main body can be calculated. Therefore, for example, in the case of a month in which the difference is small, it is possible to consider that the introduction effect of the demand control device main body is small and set the usage fee low, and the user can install the demand control device main body with confidence. There is a merit that can be done. Also, it becomes easy for the provider to confirm the introduction effect of the demand control device main body.

[0119]

According to the first aspect of the present invention, it is possible to provide an electric energy calculating apparatus capable of calculating an actual electric power consumption and an actually reduced electric energy to calculate the reduced electric energy. Was. Further, according to the second aspect of the present invention, it is possible to provide a power amount calculating apparatus capable of calculating an actual power consumption amount and an actually reduced power amount and calculating a reduction in a basic charge. Further, according to the third aspect of the present invention, it is possible to provide a power amount calculation method capable of calculating an actual power consumption amount and an actually reduced power amount to calculate the reduced power amount. According to the fourth aspect of the present invention, it is possible to provide a power amount calculation method capable of calculating an actual power consumption amount and an actually reduced power amount and calculating a reduction in a basic charge.
According to the fifth aspect of the present invention, it is possible to provide a power amount calculation device including means for transmitting reduced power amount information to an information processing device that performs predetermined processing according to the reduced power amount. . According to the sixth aspect of the present invention,
It has been possible to provide a power calculation device including means for transmitting reduced maximum demand information to an information processing device that performs predetermined processing according to the reduced demand. Further, according to the invention of claim 7, it is possible to provide a processing system of power amount information for performing predetermined processing on the reduced power amount information or the reduced maximum demand information by using the information processing device. Also,
According to the invention described in claim 8, it is possible to provide a processing system of power amount information for calculating the usage fee of the demand control device body by using the information processing device with the reduced power amount information or the reduced maximum demand information. Was.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a first embodiment of a demand control device.

FIG. 2 is a time chart for explaining a forced stop time of a compressor motor.

FIG. 3 is a flowchart illustrating a method of calculating a monthly actual power consumption.

FIG. 4 is a flowchart illustrating a method of calculating a monthly reduced power amount.

FIG. 5 is a flowchart illustrating a method of calculating the actual maximum demand.

FIG. 6 is a flowchart illustrating a method of calculating a reduced maximum demand.

FIG. 7 is a graph showing an example of the results of the monthly reduced demand, the actual demand, and the predicted maximum demand.

FIG. 8 is a block diagram showing a configuration of a second embodiment of the demand control device.

FIG. 9 is a flowchart illustrating a method for calculating a monthly reduced power amount in the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Demand control device 2 Electric power detection sensor 3 Pulse converter 4 Demand controller 41 Programmable controller (PLC) 411 Actual power consumption operation part 412 Reduced electric power operation part 413 Actual maximum demand operation part 414 Reduction maximum demand operation part 415 2nd Reduced power calculation unit 416 Second reduced maximum demand calculation unit 42 Digital switch 43 Output relay 5 Electromagnetic contactor 101 Transaction power meter 102 Indoor unit 103 Outdoor unit 104 Compressor motor 105 Controller 106 Compressor motor control relay

Claims (8)

[Claims] 1. A demand for controlling the amount of power used within a unit time within a range of a predetermined amount of power by load control for monitoring the amount of power used in the facility and forcibly stopping a demand control target device. A control device main unit, an actual power consumption calculation unit for calculating an actual power consumption within a predetermined period under the load control, the forced stop time of the demand control target device within the predetermined time, and the demand A power amount calculating device comprising: a reduced power amount calculating unit configured to calculate a reduced power amount from the power reduced by the load control of the control target device. 2. A demand for controlling the amount of power used within a unit time to be within a preset range of power by load control for monitoring the amount of power used in the equipment and forcibly stopping the demand control target device. An actual power consumption calculation unit for calculating the power consumption within the unit time period under the load control by the control device body; and a result having the largest value among the power consumptions calculated by the actual power consumption calculation unit. An actual maximum demand calculation unit for calculating a maximum demand, and a reduced power amount calculated from the forced stop time of the demand control target device within a unit time period and the power reduced by load control of the demand control target device. And a reduced maximum demand calculating unit for calculating a reduced maximum demand having the largest value among reduced demands within a predetermined period. 3. A demand for controlling the power consumption within a unit time to be within a preset power consumption range by monitoring the power consumption in the equipment and forcibly stopping the demand control target device. An actual power consumption calculation procedure for calculating an actual power consumption within a predetermined period under the load control according to a control procedure; the forced stop time of the demand control target device within the predetermined time; and the demand control. A power calculation method for calculating a reduced power from the power reduced by the load control of the target device. 4. A demand for monitoring the amount of power used in a facility and controlling the amount of power used within a unit time period to fall within a predetermined range of power by load control for forcibly stopping a device to be demand-controlled. The actual power consumption calculation procedure for calculating the power consumption within the unit time period under the load control by the control procedure, and the actual maximum power consumption value that is the largest of the power consumptions calculated by the actual power consumption calculation procedure. An actual maximum demand calculation procedure for calculating demand, and a reduced power amount calculated from the forced stop time of the demand control target device within a unit time period and the power reduced by load control of the demand control target device. And a reduced maximum demand calculation procedure for calculating a reduced maximum demand having the largest value among reduced demands within a predetermined period. 5. A demand for controlling power consumption in a facility and controlling the power consumption within a unit time period to fall within a preset power consumption range by load control for forcibly stopping a demand control target device. A control device main unit, an actual power consumption calculation unit for calculating an actual power consumption within a predetermined period under the load control, the forced stop time of the demand control target device within the predetermined time, and the demand A reduced power calculation unit configured to calculate the reduced power from the power reduced by the load control of the control target device; and the reduced power information calculated by the reduced power calculation unit. A power calculation device comprising: a transmission unit for transmitting to a provider. 6. A demand for controlling the amount of power used within a unit time to fall within a preset range of power by load control for monitoring the amount of power used in the equipment and forcibly stopping the demand control target device. An actual power consumption calculation unit for calculating the power consumption within the unit time period under the load control by the control device body; and a result having the largest value among the power consumptions calculated by the actual power consumption calculation unit. An actual maximum demand calculation unit for calculating a maximum demand, and a reduced power amount calculated from the forced stop time of the demand control target device within a unit time period and the power reduced by load control of the demand control target device. A reduced maximum demand calculating section for calculating a reduced maximum demand having the largest value among reduced demands within a predetermined period; A transmission unit for transmitting the reduced maximum demand information calculated by the calculation unit to a provider of the demand control device main body. 7. The electric energy calculation device according to claim 5, which is held by a user, and the reduced electric energy information which is held by a provider of a demand control device main body and transmitted from a transmission unit of the electric energy calculation device. Alternatively, a power information processing system including a receiving unit that receives the reduced maximum demand information, and an information processing device that performs predetermined processing on the received reduced power amount information or the reduced maximum demand information. 8. The power information processing system according to claim 7, wherein the information processing device is provided in a facility owned by a user based on the reduced power amount information or the reduced maximum demand information received by the receiving unit. Calculating a difference between the electricity rate before the introduction of the demand control device main body and the electricity price after the introduction, and calculating a usage fee of the demand control device main body based on the difference. A processing system for certain electric energy information.