JP5433104B1 - Self-synchronous operation type demand reduction device - Google Patents

Abstract

An object of the present invention is to manually synchronize with the start of measuring the amount of electric power for each reference time by the entire power receiving facility and independently output a stop signal for stopping the outdoor unit at a fixed timing.
A control power input circuit 10 having a main power switch 11, a synchronization command push button 20 for manually synchronizing the start of measurement of electric energy with the entire power receiving facility 2, and a synchronization command push button 20 are turned on. A timer 30 that measures the time at the same time, a program controller 40 that sets a timing for stopping the outdoor unit 6 every reference time from the start of measuring the amount of power by the overall power receiving facility 2 synchronized with the synchronization command pushbutton 20, A control timing determination circuit 50 for generating a stop signal for stopping the outdoor unit 6 during a period in which the time measured by the timer 30 reaches the timing set by the program controller 40; A control signal output circuit 60 for outputting to the machine 6 is provided.
[Selection] Figure 1

Description

  The present invention relates to a self-synchronized operation type demand reduction device that manually synchronizes with the start of measurement of electric energy at regular time intervals by the entire power receiving facility and outputs a stop signal for stopping an outdoor unit at a constant timing.

Electricity charges of electric power companies (excluding household electricity charges) are calculated based on “basic charges (= contracted power × charge unit price)” determined by contract power and “power charges” determined by power consumption. Of these, the contract power is only 30 minutes average power, and the basic charge for the next year is determined.
In other words, the basic power charge is stipulated to continue to pay the maximum maximum value every 30 minutes (the probability of 1/175520 = 365 × 24 × 2) for one year. Here, the power consumption of air conditioning is the largest, and when the power consumption of air conditioning and lighting is combined, it occupies about 72%. Therefore, power saving in these fields is extremely effective as a power saving measure.

In many outdoor units of air conditioners installed on a rooftop or the like, electric motors are operated by signals from the respective indoor units. For this reason, each outdoor unit repeatedly stops operation without cooperation with other outdoor units. Therefore, the outdoor unit is operated at the same time, and the demand (power requirement) increases.
Therefore, as a method of suppressing the maximum demand power, demand control is introduced and cooperative operation is performed on outdoor units of a plurality of air conditioning machines. Here, the demand control is a control for avoiding an increase in demand (contract power value) by avoiding simultaneous introduction of air-conditioning outdoor units. In other words, when maximum demand power is expected, this is operation control that outputs an operation stop signal to the outdoor units of some air conditioners.

  Demand control has a low power load, but the lighting / outlet, etc., that you notice when controlling at a medium level, and a production device / medical facility that has a relatively large power load but is difficult to control at a medium to high level. Is not done. About demand control, it describes in patent document 1 as demand side management (DSM: load control or load adjustment).

JP 2010-204833 A

  A simple system diagram of demand control is shown in FIG. As shown in FIG. 3, electric power is supplied from an electric power company 1 to each facility (factory, school, building, etc.), and the supplied electric power passes through an entire power receiving facility (a so-called electric energy meter of the electric power company) 2. And distributed to the medical machine 3, the kitchen machine 4, the lighting outlet 5, and the air conditioner outdoor unit 6. The air conditioner outdoor unit 6 is modified for demand control.

  In the overall power receiving facility 2, an overall received power transmitter (hereinafter, a power signal detection device) 7 for demand management of the overall power receiving point is newly installed. The power signal detection device 7 outputs a pulse signal indicating the start of measurement at the start of measuring the amount of power every fixed time (usually 30 minutes, referred to as the reference time in the present invention) by the entire power receiving facility 2 at the power receiving point. In addition, the amount of power measured by the entire power receiving facility 2 is output as a pulse signal. The pulse signal output from the power signal detection device 7 is input to the demand control device 8. The demand control device 8 is a controller for demand management of the entire power receiving point, and is newly installed in the office. A signal transmission wire is laid between the power signal detection device 7 and the demand control device 8, and an operation signal line is laid between the demand control device 8 and the air conditioner outdoor unit 6.

The demand control device 8 automatically starts demand control in synchronization with a pulse signal indicating the start of measurement of electric energy for each reference time output from the power signal detection device 7, and sets a demand target value (example) : Air conditioning stop signal is automatically output to the air conditioner outdoor unit 6 so as not to exceed 500 kwh).
That is, as shown in FIG. 4, the demand control device 8 calculates a predicted value A that increases with the passage of time from the power consumption (actual value) after the start of operation.

When the demand control device 8 predicts that the predicted value A exceeds the target value within the reference time (30 minutes) from the start of control, the demand control device 8 starts to issue an air conditioning stop signal to a part of the outdoor unit 6 of the air conditioning machine (one-step air conditioning off) ). Since some of the air conditioner outdoor units 6 are stopped, the increase in the amount of power used is moderated as shown as the control value. When a certain period of time has elapsed since the stop of air conditioning, the air conditioning stop signal for the air conditioner outdoor unit 6 is terminated, and the operation of the air conditioner outdoor unit 6 is resumed.
Thereafter, as shown in FIG. 3, the demand control device 8 calculates a new predicted value B that increases with the passage of time from the power consumption (actually measured value), and when the new predicted value B exceeds the target value. If predicted, an air conditioning stop signal is output to more air conditioner outdoor units 6 (2 to 3 stages of air conditioning off).

As a result, more air conditioner outdoor units 6 stop, and as shown as control values, the increase in power consumption becomes even more gradual, and the demand target is reached when the reference time (30 minutes) has elapsed since the start of control. The air conditioning stop signal for all the air conditioner outdoor units 6 is terminated after that.
Furthermore, the demand control device 8 restarts every reference time from the start of control, and repeats the demand control.

The demand control device 8 described above is a non-independent device that cannot exist independently of the power signal detection device 7 because of necessity based on the pulse signal output from the power signal detection device 7.
Therefore, it is necessary to provide the power signal detection device 7 in the overall power receiving facility 2, and between the demand control device 8 installed in the office and the power signal detection device 7 installed in the overall power receiving facility 2, In addition to the necessity of a signal transmission wire, an operation signal line is required between the demand control device 8 installed in the office and the air conditioner outdoor unit 6 arranged outdoors.

  Further, since the demand control device 8 repeatedly sets the predicted values A and B so as not to exceed the demand target value, there are cases where the design is expensive and expensive.

The self-synchronous operation type demand reduction device according to claim 1 of the present invention that solves the above-described problems is directed to the overall power reception for outdoor units of a plurality of air conditioners that are supplied with electric power from an electric power company through the overall power reception facility. In a self-synchronous operation type demand reduction device that manually synchronizes with the start of measurement of electric energy every fixed time (hereinafter referred to as a reference time) by equipment and outputs a stop signal to stop the outdoor unit at a fixed timing . A synchronization command pushbutton for manually synchronizing with the start of power measurement by the overall power receiving facility, a timer for measuring time at the same time the synchronization command pushbutton is inserted, and synchronized with the synchronization command pushbutton A program controller that sets one or more times to stop the outdoor unit at each reference time from the start of measuring the amount of power by the entire power receiving facility A roller, a control timing determination circuit that generates a stop signal for stopping the outdoor unit during a period when the time measured by the timer reaches the timing set by the program controller, and the control timing determination circuit A control signal output circuit that outputs the generated stop signal to some or all of the outdoor units of the plurality of air conditioning machines, the indoor unit, or a centralized remote control device, and further turns on the main power supply of the entire device A control power input circuit having a main power switch for turning off / off, and the control power input circuit further includes a temperature detecting sensor for detecting an outside air temperature, and the outside air temperature detected by the temperature detecting sensor Is in an energy saving mode in which the main power supply is turned off when the temperature is within a certain temperature range .

The self-synchronous operation type demand reduction device according to claim 2 of the present invention that solves the above problem is the self-synchronous operation type demand reduction device according to claim 1 , wherein the program controller stops the outdoor unit at the timing. A stop time selection switch for selecting a stop time is provided.

The self-synchronous operation type demand reduction device according to claim 3 of the present invention that solves the above-mentioned problem is the self-sustained operation type demand reduction device according to claim 1 , wherein the stop time for stopping the outdoor unit is selected according to the timing. A stop time selection switch is provided, and when the outside air temperature detected by the temperature detection sensor is a low temperature that is lower than the certain temperature range, the outdoor unit is stopped without being selected by the stop time selection switch. It has a stop time automatic change switch for automatically changing the time to the shortest time.

  According to the present invention, since the stop signal for stopping the outdoor unit at a constant timing is manually output in synchronization with the start of measurement of the electric energy for each reference time by the entire power receiving facility, the power signal for the entire power receiving facility is output. By eliminating the need for the detection device and the need for signal line construction that tends to be long, it is possible to reduce the amount of power per reference time. Furthermore, if this device is installed for each group of air conditioning machines installed in buildings such as factories, offices, schools, hospitals, etc. that are separated from each other within the same power receiving point, demand can be reduced by independent synchronous operation all at once. . In reality, it becomes a great merit of the present invention that the signal line between the distant buildings (this device and the entire power receiving facility) becomes unnecessary.

1 is a block diagram of a self-synchronous operation type demand reduction device according to an embodiment of the present invention. It is a graph which shows the driving | running state by the self-synchronous operation type | mold demand reduction apparatus which concerns on one Example of this invention. It is a block diagram of the demand control system which concerns on a prior art. It is a graph which shows the driving | running condition of the demand control which concerns on a prior art.

  Hereinafter, the self-synchronous operation type demand reduction device of the present invention will be described in detail with reference to the embodiments shown in the drawings.

A self-sustained operation type demand reduction device 100 according to an embodiment of the present invention is shown in FIG.
The self-sustained synchronous operation type demand reduction device 100 according to the present embodiment is applied to an outdoor unit 6 of a plurality of air conditioning machines to which power is supplied from an electric power company (see FIG. 3) 1 through an overall power receiving facility (see FIG. 3) 2. On the other hand, it is a demand control device that manually synchronizes with the start of measurement of the electric energy for each reference time by the entire power receiving facility 2 and outputs a stop signal for stopping the outdoor unit 6 at a fixed timing.

  Specifically, as shown in FIG. 1, the self-synchronous operation type demand reduction device 100 includes a control power input circuit 10, a synchronous command push button 20, a timer 30, a program controller 40, a control timing determination circuit 50, and a control signal output. A circuit 60 is provided.

  The control power input circuit 10 includes a main power switch 11 that is connected to an external power line and turns on / off the main power of the entire apparatus. When the main power switch 11 is turned on, the main devices of the self-synchronized operation type demand reduction device 100 are activated, and when the main power switch 11 is turned off, the main devices of the self-sustained operation type demand reduction device 100 are stopped. It becomes. Therefore, when the main power switch 11 is turned off except when necessary, the amount of electricity used is reduced and energy is saved.

The control power input circuit 10 further includes a temperature detection sensor 12 for detecting the outside air temperature. When the outside air temperature detected by the temperature detection sensor 12 is within a certain temperature range, the energy saving mode switch that turns off the main power source. 13
The air-conditioning machine is generally operated during the summer when the outside temperature is high and during the winter when the outside temperature is low, but is generally stopped during the spring and autumn seasons. Therefore, if the energy saving mode switch 13 is turned ON, even when the main power switch 11 is turned ON, the main power supply is turned OFF during a certain temperature range, except during the summer and winter seasons. The main equipment of the reduction device 100 is stopped. As a result, in spring and autumn, the amount of electricity used is reduced and energy is saved. For example, the constant temperature range is set to 10 ° C to 20 ° C.

The synchronization command push button 20 is a button for manually synchronizing with the start of measurement of electric energy by the overall power receiving facility 2.
For example, a worker with a mobile phone stands in front of the entire power receiving facility 2 and the self-synchronous operation type demand is detected by the mobile phone at the start of measuring the amount of electric power by the entire power receiving facility 2 (at which time the meter becomes 0). The operator standing in front of the reduction device 100 is contacted and the synchronous command push button 20 is inserted.

That is, the self-synchronized operation type demand reduction device 100 is manually synchronized with the synchronization command push button 20 when the whole power receiving facility 2 starts measuring the electric energy and starts control.
It should be noted that the synchronization by the synchronization command push button 20 is not a strict meaning, and it is sufficient if the synchronization command push buttons 20 are input almost simultaneously. This is because, as will be described later, since a stop signal is output to the outdoor unit 6 in minutes, the deviation in seconds can be ignored.

As shown in FIG. 2, the timer 30 measures the time at the same time when the synchronization command push button 20 is input. That is, demand control is started at the same time when the timer 30 measures time. In FIG. 2, as an example, the control starts from 12:00.
As the timer 30, it is preferable to maintain the measurement function with standby power or an internal battery so that the time can be continuously measured regardless of whether the main power supply is on or off. As described above, if the time measurement by the timer 30 can be continued, the synchronization by the synchronization command push button 20 does not need to be frequently performed, and once a year is sufficient. This is because the start of measuring the amount of power by the overall power receiving facility 2 is not changed for at least one year.

The program controller 40 sets one or a plurality of times at which the outdoor unit 6 is stopped at each reference time from the start of measuring the amount of power by the entire power receiving facility 2 synchronized with the synchronization command push button 20. The set one or more times will be described later.
The control timing determination circuit 50 generates a stop signal for stopping the outdoor unit 6 while the time measured by the timer 30 has reached one or more times set by the program controller 40. The stop signal has a standard corresponding to the outdoor unit 6 of any manufacturer's air conditioning machine.

  The control signal output circuit 60 outputs the stop signal generated by the control timing determination circuit 50 to the outdoor units 6 of a plurality of air conditioning machines. Since the outdoor unit 6 is generally provided with an external terminal for demand control, it is connected to the control signal output circuit 60 using this external terminal. In the present embodiment, stop signals are simultaneously output to all of the outdoor units 6, but it may be set so that stop signals are output to a plurality of outdoor units 6 in order. In addition, by installing a function for shifting the time when each air-conditioning machine is turned on, it is possible to make a difference in demand control time in each air-conditioning area. Instead of outputting a stop signal to the outdoor unit 6 of the air conditioning machine, it is also possible to output a stop signal to the indoor unit or a centralized remote controller (not shown). This is because the outdoor unit 6 may not have a demand control terminal, and the indoor unit or the centralized remote control device may have a demand control terminal. The outdoor unit 6 is stopped based on the stop command output to the indoor unit or the central remote controller.

Here, as shown in FIG. 2, the program controller 40 starts the control from 12:00, and as an example of two timings to stop the outdoor unit 6, as an example, during the reference time of 30 minutes, from 12:12 Set up to 12:15 and 12:27 to 12:30. Therefore, the control timing determination circuit 50 generates stop signals from 12:12 to 12:15 and from 12:27 to 12:30 and outputs the stop signals from the control signal output circuit 60 to the outdoor unit 6.
Therefore, the power consumption (demand) remains constant without increasing from 12:12 to 12:15, and remains constant without increasing from 12:27 to 12:30. That is, since the outdoor unit 6 stops for 3 minutes × 2 = 6 minutes during the reference time of 30 minutes, the power consumption for 6 minutes is reduced. Therefore, according to the present embodiment, the demand of 6/30 = 20% is reduced.

For example, as shown in FIG. 2, in the case of power usage of 100 kwh without demand control, if the demand of 20% is reduced, 100 kwh × 20% = 20 kwh will be reduced, and the power usage will be 80 kwh. As an example, the timing is set at two times, but it is also possible to set one timing, for example, 6 minutes × 1 time. The demand in FIG. 2 shows the air-conditioning demand graph except an electric power outlet.
In addition, since the outdoor unit 6 of the air conditioning machine is generally designed and constructed with a margin of about 20%, even if the outdoor unit 6 is stopped for 30 minutes for 30 minutes, a healthy person feels uncomfortable. It seems that there is nothing.

Furthermore, the program controller 40 includes a stop time selection switch 41 that selects a stop time for stopping the outdoor unit 6.
As described above, as an example, if the stop time is 3 minutes × 2 = 6, the demand is reduced by 20%, but the demand may be excessively reduced. For example, in an elderly home, when air conditioning is used as heating in the winter season, if the demand is reduced by 20%, the health of the resident may be impaired due to insufficient heating.

  Assuming such a case, the stop time is set to 2 minutes × 2 = 4, and an option for reducing the demand of 4/30 = 13% is provided. For example, as the stop time selection switch 41, a selection switch of H (stop time 3 minutes × 2 = 6, 20% demand reduction) or L (stop time 2 minutes × 2 = 4, 13% demand reduction) may be provided. . In addition, as an option, it is good also as three or more limited to two.

Further, the program controller 40, when the outside air temperature detected by the temperature detection sensor 12 is a low temperature below a certain temperature range (10 ° C. to 20 ° C.), is independent of the selection by the stop time selection switch 41. 6 has a stop time automatic change switch 42 for automatically changing the stop time to stop to the shortest time.
As mentioned above, in a nursing home, when air conditioning is used as heating in the winter season, reducing the demand of 20% may impair the health of the resident. The stop time selection switch 41 may be switched from H to L, but it is possible that the stop time selection switch 41 may be forgotten due to carelessness.

  Therefore, if the stop time automatic change switch 42 is turned on, even if the stop time selection switch 41 is switched to H, the outside air temperature detected by the temperature detection sensor 12 is within a certain temperature range (10 ° C. to 20 ° C. When the air conditioner is used as heating in the winter, that is, when the air conditioner is used as heating in the winter, the stop time selection switch 41 is automatically switched from H to L, and it is unexpected that the health of the resident is impaired in the nursing home. It becomes possible to prevent the situation in advance.

As described above in detail based on the embodiment, the self-synchronous operation type demand reduction device 100 according to the present embodiment is manually synchronized with the synchronization command push button 20 at the start of the measurement of the electric energy by the entire power receiving facility 2. Therefore, there is no need to provide a power signal detection device in the overall power receiving facility 2, and there is an advantage that no signal transmission line is required between the power reception device and the power signal detection device.
Therefore, the self-sustained operation type demand reduction device 100 may be installed outdoors and simply connected to the outdoor unit 6, and the cost can be reduced.

  Further, since the stop signal for stopping the outdoor unit 6 is independently output at the timing set in the program controller 40, the predicted value is set repeatedly so as not to exceed the demand target value, and the design is expensive. There is also an advantage that it can be designed at a low cost as compared with the conventional demand control device.

 INDUSTRIAL APPLICABILITY The present invention is widely used as a self-synchronous operation type demand reduction device that manually synchronizes with the start of measurement of electric energy every fixed time by the entire power receiving facility and outputs a stop signal for stopping the outdoor unit at a fixed timing. It is available on top.

DESCRIPTION OF SYMBOLS 10 Control power input circuit 11 Main power switch 12 Temperature detection sensor 13 Energy saving mode switch 20 Synchronous command push button 30 Timer 40 Program controller 41 Stop time selection switch 42 Stop time automatic change switch 50 Control timing judgment circuit 60 Control signal output circuit 100 Self-synchronous operation type demand reduction device

Claims (3)

Manually synchronize the start of measurement of the amount of electric power for each fixed time (hereinafter referred to as the reference time) for the outdoor units of a plurality of air conditioners that are supplied with electric power from the electric power company through the entire power receiving facility In the self-synchronous operation type demand reduction device that outputs the stop signal that stops the outdoor unit at a fixed timing independently,
Synchronous to the synchronization command pushbutton for manually synchronizing with the start of power measurement by the overall power receiving facility, a timer for measuring time at the same time as the synchronization command pushbutton is inserted, and the synchronization command pushbutton A program controller that sets one or more times to stop the outdoor unit at each reference time from the start of measurement of electric energy by the overall power receiving facility, and a time measured by the timer is set by the program controller. A control timing determination circuit that generates a stop signal for stopping the outdoor unit during a period of reaching the timing; and the stop signal generated by the control timing determination circuit is used as one of the outdoor units of the plurality of air conditioning machines. Part or all, a control signal output circuit that outputs to the indoor unit or centralized remote control device,
Furthermore, a control power input circuit having a main power switch for turning on / off the main power of the entire apparatus is provided,
Further, the control power input circuit includes a temperature detection sensor for detecting an outside air temperature, and has an energy saving mode in which the main power is turned off when the outside air temperature detected by the temperature detection sensor is within a certain temperature range. Self-synchronous operation type demand reduction device characterized by that. Said program controller, self synchronous operation type demand reduction apparatus according to claim 1, characterized in that it comprises a stop time selection switch for selecting a stop time for stopping the outdoor unit by the timing. The program controller includes a stop time selection switch for selecting a stop time for stopping the outdoor unit according to the timing, and when the outside air temperature detected by the temperature detection sensor is a low temperature below the certain temperature range. is claim 1 self synchronous operation type demand, wherein a has a stop time automatic change switch for automatically changing fastest in the stop time during which the outdoor unit irrespective of the selection by the stop time selection switch is stopped Reduction device.

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