JPH09266630A - Power suppression control device, air conditioner - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] In this power suppression control device, when a demand command is issued, capacity reduction control is performed according to the number of devices in operation and the capabilities of the devices in operation. Since it also changes depending on the outdoor temperature condition, there is a problem in that even if the number of operating devices and the capabilities of the operating devices are input, it is not possible to know the actual power consumption. A power suppression control device according to the present invention includes one or a plurality of electric load devices and a power suppression time setting unit.
And a power reduction rate setting unit 3, and the power reduction time setting unit 2 and the power reduction rate setting unit 3 change and control the capacity of the electric load device.
This power suppression control device is configured to operate the electric load device with a capacity obtained by multiplying the rated capacity of the electric load device by the set power reduction rate in the set power suppression time. .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power suppression control device for suppressing power consumption of an air conditioner or the like using a compressor.

[0002]

2. Description of the Related Art FIG. 6 shows, for example, JP-A-5-231691.
It is a block diagram explaining the electric power suppression control apparatus of the air conditioner disclosed by the publication. In the figure, 1 is a power suppression control device, 10 is a capacity reduction rate determining means, 11 is storage means,
12 is output means, 13 is a demand command, 14 is the number of operating air conditioners, 15 is capacity of the compressor, 6a, 6b, 6c.
Are first, second and third compressors.

Next, the operation of the power suppression control device for the air conditioner will be described with reference to the drawings. When the demand command 13 is issued, the capacity reduction rate of the compressor is changed according to the operating number 14 of the air conditioner and the compressor capacity 15 of the operating air conditioner, and the capacity corresponding to this capacity reduction rate. The operation of the first, second and third compressors 6a, 6b, 6c is continued.

Further, the actual power consumption at the midpoint of a certain time is compared with the midpoint target value of the power consumption pattern setter, and when the real power consumption exceeds the midpoint target value, the driving ability is automatically corrected downward. However, a technique for energy saving operation is disclosed in Japanese Patent Laid-Open No. 63-46330.

[0005]

When the demand command is issued as described above, the conventional power suppression control device responds to, for example, the number of operating air conditioners and the capacity of the compressors of the air conditioners during operation. The compressor capacity reduction control is performed.
However, the relationship between the capacity of the compressor and the power consumption is generally not a perfect proportional relationship, and the capacity reduction rate of the compressor and the actual power consumption reduction rate do not match. In addition, since this relationship generally changes depending on the indoor and outdoor temperature conditions, even if the number of operating air conditioners and the capacity of the air conditioner compressors in operation are input, they are actually consumed. You cannot know the power accurately.

The present invention has been made to solve such a problem, and can surely reduce the amount of power consumption preset by the power supplier and the user, and reduce the power consumption. It is an object of the present invention to provide a power suppression control device capable of minimizing deterioration of performance caused by, for example, deterioration of comfort in the case of an air conditioner.

[0007]

A power suppression control device for an electric load device such as an air conditioner according to the present invention includes one or a plurality of electric load devices, power suppression time setting means, and power reduction. And a power reduction control device that changes and controls the capacity of the electric load device by setting the power reduction time setting device and the power reduction ratio setting device, and the power suppression control device is set. A power suppression control device, wherein the electric load device is operated with a capacity obtained by multiplying a rated power capacity of the electric load device by a set power reduction rate in the power suppression time.

Further, a power suppression control device for an electric load device such as an air conditioner according to the present invention comprises one or a plurality of electric load devices, a power suppression time setting means and a power reduction rate setting means. A power meter for measuring the power consumption of the electric load device, comprising a power suppression control device that changes and controls the capacity of the electric load device by setting the power suppression time setting means and the power reduction rate setting means. Provide, measure the average power consumption in a certain time before the set power suppression time, the power value obtained by multiplying the average power consumption by the power reduction rate set above, the target value of the average power consumption in the power suppression time It is what

A power suppression control device for an electric load device such as an air conditioner according to the present invention measures an average power consumption during a fixed time within the power suppression time,
The capacity of the electric load device is changed and controlled according to the measured value.

Further, a power suppression control device for an electric load device such as an air conditioner according to the present invention has a time measuring means for measuring the current time, and measures the average power consumption during a fixed time within the power suppression time. Depending on the measured value and the remaining time from the current time to the end time of the set power suppression time,
The capacity of the electric load device is changed and controlled.

Further, according to the present invention, a power suppression control device for an electric load device such as an air conditioner performs control for time-varying the capacity of the electric load device within a power suppression time. .

Further, according to the present invention, there is provided a power suppression control device for an electric load device such as an air conditioner, wherein the power suppression control device varies the capability of each electric load device with time within the power suppression time. In addition, the phase of the fluctuation wave is shifted between the plurality of electric load devices, and control is performed so that the total power consumption of all the electric load devices maintains a constant value.

In the air conditioner according to the present invention, a variable capacity compressor is used as the electric load device of the electric suppression control device.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1. 1 and 2 are diagrams for explaining an embodiment of a power suppression control device for an air conditioner according to the present invention, for example. FIG. 1 is a diagram showing a configuration of a power suppression control device, and FIG. 2 is a flowchart diagram showing a flow of processing in the power suppression control device. In FIG. 1, 1 is a power suppression control device for performing power suppression control of an air conditioner, 2 is a power suppression time setting means by which a user sets start and end times of power suppression, and 3 is a power reduction rate by a user. The power reduction rate setting means to be set, 4 is a time measuring means for measuring the current time,
Reference numeral 5 is a capacity change control means for changing and controlling the capacity of the compressor by the outputs of the power suppression time setting means 2, the power reduction rate setting means 3 and the time counting means 4, and 6a and 6b are the capacity variable type first and second. Compressor, 7 is a power meter, 8a and 8b are power lines, 9
Reference numerals a, 9b and 9c are signal lines. The capacity change control means 5 for changing and controlling the capacity of the compressor has, for example, a power reduction rate of 0%.
When set to a value of 100%, the compressor is controlled to operate at the operating frequency obtained by (maximum operating frequency of compressor) x (1-power reduction rate). At this time, the output capacity and the power consumption of the compressor are reduced substantially in proportion to the operating frequency.

FIG. 2 is a flow chart showing the flow of processing in the power suppression control system. The operation of the power suppression control device will be described with reference to the drawings. The operation of the power suppression control device starts (S100), and the user sets the power suppression start time and end time by the power suppression time setting means 2 (S101). Next, the user sets the power reduction rate by the power reduction rate setting means 3 (S102).
Next, for example, when 30 minutes before the set power suppression start time (S103), the first compressor 6a by the power meter 7
And the measurement of the power consumption of the second compressor 6b is started, the power consumption is measured for 30 minutes until the set power suppression start time, and the average value thereof is calculated (S10).
4). Next, when the set power suppression start time is reached (S105), the calculated average power consumption before the start of power suppression and the set power reduction rate are used to calculate a target value for power suppression by the following formula. Yes (S106). Target value of power suppression = (average power consumption before starting power suppression)
× (1-power reduction rate)

Next, the operation within the power suppression time from the set power suppression start time to the end time will be described. Even during the power suppression time, the first compressor 6a by the power meter 7
And the measurement of the power consumption of the second compressor 6b is continued (S
107), the average power consumption from the power suppression start time to the current time is calculated every fixed time, for example, every 5 minutes (S108). Next, the capacity ratio of the compressor is determined according to the calculated average power consumption and the remaining time from the current time to the power suppression end time (S109).

Specifically, for example, the excess rate of the average power consumption with respect to the target value is calculated by the following equation: excess rate = (average power consumption from the power suppression start time to the current time) / (power suppression target value) For example, when the excess rate is small and the remaining time is long, the capacity rate is increased. Further, for example, when the excess rate is large and the remaining time is short, the capacity rate is reduced. As a specific method of determining the capacity rate based on the excess rate and the remaining time, a table lookup method may be used, or fuzzy inference or the like may be used. The reason for changing the capacity rate according to the remaining time is that there is a system in the electricity rate system that charges by the maximum value of the integrated power amount for 30 minutes. In this way, the electric user can be given a degree of freedom, and the target value can be reliably adjusted toward the end of 30 minutes.

Further, the reduction rate is thus 0% to 100%.
By using the absolute value of the unit of kw for the ratio and the target value, even if the rated power of the target electric load device is changed, the power suppression device can match the target value with the same algorithm. Next, the operating frequencies of the first compressor 6a and the second compressor 6b are changed and controlled based on the determined capacity ratio (S110). From this (S107) to (S
The process up to 110) is repeated every 5 minutes until the set power suppression end time comes (S111), and when the end time comes, the power suppression control ends (S112).

FIG. 3 is a graph showing an example of a change over time in power consumption when the power suppression control device for an air conditioner according to the present invention is operated. In the example of FIG. 3, the power reduction rate is 5
The figure shows the case of setting to 0%, and the power suppression start time 3
From 0 minutes before the power suppression start time, only the first compressor 6a having a rated power of 10 kw is operating. When the power suppression start time comes, operation at 50% of the rated capacity is started. Here, if the second compressor 6b starts operating 5 minutes after the power suppression start time as a disturbance, the power consumption increases again 5 minutes after the power suppression start time as shown in the figure. However, after 5 minutes, it is detected that the average power consumption for 10 minutes from the start of power suppression exceeds the target value, so the operation is changed and controlled to 40% of the rated capacity. Further, 15 minutes after the start of the power suppression, the average power consumption for 15 minutes after the start of the power suppression still exceeds the target value, and the remaining time becomes short, so the operation is changed and controlled to 30% of the rated capacity. In the same way, start power suppression 20
After 20 minutes and 25 minutes, the control is changed to 20% and 10% operation, respectively, and finally, the average power consumption from the power suppression start time to the power suppression time is controlled to fall within the target value range.

Other causes of the above-mentioned disturbance include an increase in the outside temperature and entry / exit of people. As the effect of the invention, since it is configured as described above, it is possible to accurately and surely suppress the power consumption with respect to the given target value regardless of any disturbance that may enter the system. Further, in the above description, the average value of the power consumption immediately before was calculated and set as the target value, but it is natural that this may be the power consumption at the specific time of the previous day or the previous week.

Embodiment 2 This Embodiment 2 is another example of the capacity change control means in Embodiment 1, and FIG. 4 is a flow chart showing the flow of the processing.

The operation of the power suppression control device will be described below with reference to FIG. The operation of the power suppression control device starts (S200), and the user sets the power suppression start time and end time by the power suppression time setting means 2 (S201). Next, the user sets the power reduction rate by the power reduction rate setting means 3 (S202). Next, when the set power suppression start time comes (S203), according to the set power reduction rate, the time from the power suppression start time to the current time, and the compressor number, the following formula 1, The capacity rate is calculated from 2 (S204).

[Equation 1]

[Equation 2]

Next, the operating frequencies of the first compressor 6a and the second compressor 6b are changed and controlled based on the calculated capacity ratio (S205). This (S205), the set power reduction rate, the time from the power suppression start time to the current time, and the capacity rate are calculated by Equations 1 and 2 according to the compressor number (S204). The process is repeated every 5 minutes until the set power suppression end time (S207) (S207).
206), and when the end time comes, the power suppression control ends (S208).

FIG. 5 is a graph showing an example of the change over time in power consumption when the power suppression control device according to the present invention is operated as shown in FIG. The example of FIG. 5 shows the case where the power reduction rate is set to 30%, and the first compressor 6a and the second compressor 6b are each operated at a rated power consumption of 10 kw until the power suppression start time. ing.
When the power suppression start time arrives, the first compressor 6a gradually reduces the capacity ratio to 40% of the rated capacity as the time from the current time to the power suppression end time becomes shorter according to the above equation 1, The average power saving time is 7 of the rated capacity
The ability change is controlled so that it becomes 0%. Further, the second compressor 6b is once controlled to be changed to 40% of the rated capacity at the power suppression start time according to the above expression 2, and as the time from the current time to the power suppression end time becomes shorter, the rated capacity is reduced. The capacity ratio is gradually increased up to 100%, and the capacity change control is performed so that the power suppression time average becomes 70% of the rated capacity.

As described above, when the capacity of the air conditioner is changed with the passage of time, the room temperature is changed with the passage of time, but generally, the stimulation of the human body is comfortable due to the time variation of the room temperature. It is said to improve the comfort of the air conditioner, and has the effect of mitigating the deterioration of comfort caused by the reduction of the power consumption of the air conditioner. In addition, when the capacity is gradually decreased like the first compressor shown in FIG. 5, the capacity is reduced stepwise and kept constant because the heat capacity of the interior furniture and the like effectively acts. It has been experimentally confirmed that the change in the room temperature is smaller than that in the room temperature.

In this case, the first compressor and the second compressor
The total value of the power consumption of the compressor is always controlled to a constant value that represents 70% of the total value of the rated capacity during the power suppression time. In this way, by adding the control for shifting the phase of the time-varying wave of the capacity between the plurality of compressors in the system, it is possible to prevent the peak of power consumption due to the capacity-varying wave from occurring.

In this example, the two electric compressors have the same rated capacity, but when the number of compressors is three or more,
Or, if the rated capacity of each compressor is different, assign a number to each compressor so that the total value of the rated capacity of the compressors with the same number is as equal as possible. It can be controlled to be almost constant.

Although the first and second embodiments have been described by taking the compressor of the air conditioner as an example, it goes without saying that there is no need to be restricted to this. For example, a water heater,
The same effect can be obtained when applied to a power suppression control device for an electric load device such as floor heating.

[0029]

According to the first aspect of the present invention, a power suppression control device for an electric load device such as an air conditioner is
A plurality or a plurality of electric load devices, and a power suppression time setting means and a power reduction rate setting means. By setting the power suppression time setting means and the power reduction rate setting means, the capacity of the electric load device is changed and controlled. And a power suppression control device for operating the electric load device with a capacity obtained by multiplying a rated capacity of the electric load device by a set power reduction rate in a set power suppression time. With this configuration, the power supplier and the user can clearly determine the power reduction time and the power reduction amount before and after the power reduction is performed, and thus it is possible to obtain an easy-to-use power suppression control device.

According to a second aspect of the present invention, there is provided a power suppression control device for an electric load device such as an air conditioner, one or a plurality of electric load devices, a power suppression time setting means and a power reduction rate setting. And a power suppression control device for changing and controlling the capacity of the electric load device by setting the power suppression time setting device and the power reduction rate setting device, and a power meter for measuring the power consumption of the electric load device. Is provided, the average power consumption in a certain time period before the set power suppression time is measured, and the power value obtained by multiplying the average power consumption by the set power reduction rate is the target of the average power consumption in the power suppression time. Since the value is set, the power suppression control device that can surely reduce the amount of power set by the power supplier and the user before execution can be obtained.

A power suppression control device for an electric load device such as an air conditioner according to a third aspect of the present invention measures an average power consumption during a certain time within the power suppression time and responds to the measured value. As a result, the power load device is configured to change and control the capacity of the electric load device.Therefore, even if a disturbance due to changes in temperature conditions or operating conditions occurs during power reduction, the power supplier or user can It is possible to obtain a power suppression control device that can reliably reduce the set amount of power.

A power suppression control device for an electric load device such as an air conditioner according to a fourth aspect of the present invention has a clocking means for measuring the current time, and the average consumption at a constant time within the power suppression time. It is configured to change and control the capacity of the electric load device according to the measured value of electric power and the remaining time from the current time to the end time of the set electric power suppression time. It is possible to obtain the power suppression control device capable of executing the set amount of reliable power reduction within the previously set time.

According to the fifth aspect of the present invention, the electric power suppression control device for an electric load device such as an air conditioner is configured to perform a control for time-varying the capacity of the electric load device. Performance degradation due to power consumption reduction,
For example, in the case of an air conditioner, it is possible to obtain a power suppression control device that can mitigate the deterioration of comfort.

According to a sixth aspect of the present invention, there is provided a power suppression control device for an electric load device such as an air conditioner in a system including a plurality of electric load devices. In the above, the capacity of each electric load device is changed with time, and the phase of the fluctuation wave is shifted between a plurality of electric load devices to perform control so that the total power consumption of all electric load devices maintains a constant value. With this configuration, it is possible to obtain the power suppression control device that can prevent the peak of the power consumption due to the capacity fluctuation wave.

An air conditioner according to claim 7 of the present invention is
By using the power suppression control device as described above,
For users, it is possible to reduce electricity charges without reducing comfort, and for electricity suppliers, use a power suppression control device that can prevent supply troubles due to the occurrence of peak power demand. The air conditioner that was used is obtained.

[Brief description of drawings]

FIG. 1 is a configuration diagram illustrating a first embodiment of the present invention.

FIG. 2 is a flowchart of the first embodiment of the present invention.

FIG. 3 is a graph showing an example of temporal changes in power consumption according to the first embodiment of the present invention.

FIG. 4 is a flow chart diagram of an electric power suppression control device for an air conditioner according to a second embodiment of the present invention.

FIG. 5 is a graph showing an example of temporal changes in power consumption according to the second embodiment of the present invention.

FIG. 6 is a configuration diagram illustrating a power suppression control device for a conventional air conditioner.

[Explanation of Codes] 1 power suppression control device, 2 power suppression time setting means, 3
Power reduction rate setting means, 4 timing means, 5 capacity change control means, 6a first compressor, 6b second compressor,
7 Power meter, 8a, 8b Power line, 9a, 9b, 9c
Signal line

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshihide Sheno, 1-20 Kitakanyama, Otaka-cho, Midori-ku, Nagoya-shi, Chubu Electric Power Co., Inc. Electricity Research Institute 2-3 2-3 Marunouchi, Chiyoda-ku Sanryo Electric Co., Ltd. (72) Inventor Hiroshi Awata 2-3-3 Marunouchi, Tokyo Chiyoda-ku Sanryo Electric Co., Ltd. (72) Inventor Shinji Hattori Chiyoda-ku, Tokyo Marunouchi 2-3 2-3 Sanryo Electric Co., Ltd. (72) Inventor Takao Tsutsumi Marunouchi 2-3-3 Sanyo Electric Co., Ltd. (72) Inventor Hiroyuki Tsuji 2 Marunouchi, Chiyoda-ku, Tokyo Chome 2-3, Sanryo Electric Co., Ltd.

Claims (7)

[Claims] 1. A single or a plurality of electric load devices, and a power suppression time setting means and a power reduction rate setting means,
By setting the power suppression time setting means and the power reduction rate setting means, a power suppression control device for changing and controlling the capacity of the electric load device, and the power suppression control device,
A power suppression control device for operating the electric load device with a capacity obtained by multiplying a rated capacity of the electric load device by a set power reduction rate in a set power suppression time. 2. A single or a plurality of electric load devices, and a power suppression time setting means and a power reduction rate setting means,
By setting of these power suppression time setting means and power reduction rate setting means, a power suppression control device for changing and controlling the capacity of the electric load device is provided, and a power meter for measuring the power consumption of the electric load device is provided, and Measure the average power consumption in a certain time before the set power suppression time, and use the power value obtained by multiplying this average power consumption by the power reduction rate set above as the target value of the average power consumption in the power suppression time. A power suppression control device characterized by: 3. The average power consumption during a fixed time within the power suppression time is measured, and the capacity of the electric load device is changed and controlled according to the measured value.
The power suppression control device described. 4. A time measuring means for measuring the current time, the measured value of average power consumption during a fixed time within the power suppression time, and the remaining time from the current time to the end time of the set power suppression time. The power suppression control device according to claim 3, wherein the capacity of the electric load device is controlled to be changed. 5. The capacity of the electric load device is changed over time during the power suppression time.
Alternatively, the power suppression control device according to 2. 6. A power suppression control device comprising a plurality of electric load devices time-varying the capacity of each electric load device within a power suppression time, and a phase of a fluctuation wave between the plurality of electric load devices. The electric power suppression control device according to claim 5, wherein the electric power suppression control device is controlled so that the total electric power consumption of all the electric load devices maintains a constant value. 7. The air conditioner according to claim 1, wherein a variable capacity electric compressor is used as an electric load device of the power suppression control device.