JPS62155724A - Demand controller - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is directed to
Monitor and control so that the amount of electricity does not exceed the contracted electricity amount.
1iTh" (demand control device).

[The Prior Art] FIG. 71 shows a conventional demand control device disclosed in Japanese Patent Application Laid-Open No. 55-48950.

The loads (A) to (N) are supplied with power from the power line (2). The wattmeters used in No. 11 loads (A) to (N) measure the output f, one load, and the 'f-1'l power meter (4), which is input to the input control section (6).

Is the demand control device (1) used and electricity contracted? In order not to exceed the power, such as: I+'l i
The target power consumption (referred to as target demand value) for 30 minutes calculated based on the contract power for performing II is recorded in the set value storage section (8). The time limit section (10) provides a demand time limit (in this case, 30 minutes as described above) of R1.

Based on the power consumption and elapsed time, the arithmetic processing unit (12)
The power consumption at the end of the demand period is predicted by Il[II value (hereinafter referred to as predicted demand value) iiq)γ.

Also, how much more electricity can be used at each point in time than the standard electricity rate, and how much? Whether power consumption must be reduced (hereinafter referred to as adjusted power) is determined by 1iti 3γ.
do.

This adjusted power is calculated by the following formula.

Remaining time As shown in Figure 5, the predicted demand value (R1) force C2 point 4 at point (X) 11 minutes after the start time (0)
If the vote demand exceeds one shift, the fifth arithmetic processing section (12) issues an alarm signal. This alarm fs number is given to the alarm control section 211 (14), and the control power lines (16a) to (16
Alarm buzzers (18A) to (18N) are operated via the alarm buzzers (18A) to (18N).

Despite the alarm being issued, electricity usage1
Suppose that r11 is not controlled and the amount of usage increases, resulting in the state at point (Y) in FIG. At this time, the predicted demand value is (
R2), and the adjusted power r1(
[If exceeds the cut-off power value, the arithmetic processing unit (12)
Outputs a cutoff signal. This cutoff signal is load printing 1
1 part (20), and the control power lines (22A) to (2
2N), the loads (A) to (t()) are cut off.

At this time, the arithmetic processing unit (12) cuts off only the load necessary to make the predicted demand value fall below the target demand value.

In this way, the demand control device 1Z(1)
When the predicted demand (fLbt exceeds the demand 1 - before), an alarm is issued, and when the adjusted power value exceeds the cutoff power value, the specified load is cut off.As a result, the average The power demand for 1113 (1 shift is 1) is controlled so that it does not exceed 1 shift.

[Problem to be solved by the invention] However, the conventional device has the following problems.

First, the loads to be cut off are cut off in the order set at the time the demand control device is installed, regardless of their importance.

Second, with conventional equipment, once the load is cut off, even if the power consumption is reduced and there is a surplus, the 11 load is reduced and the 11 equipment does not turn on the power to the load again, or even if it does turn on the power again. If the ode had been cut off, the only thing that could be done was to reintroduce it.

This invention solves the above nine problems and
The purpose is to provide a demand control device with high control capability.

Means for Solving Problem E] As shown in FIG. Priority order of 6/11 shipments 1
control order setting means for setting the load and control method; re-on signal generating means for generating a re-on signal to re-on the load that has already been cut off under predetermined conditions; The load control method setting means is provided for selecting a control method for controlling the load control method. In addition, alarm signals,
In addition to converting the cutoff signal and re-start signal into serial signals,
A signal transmission means is provided for adding the address code of the #i control device to which the fR number is to be given and sending it out to the transmission path. The load control device and the alarm control device are provided near the load and alarm means, respectively, and are arranged to receive signals from the transmission means via a transmission path.

[Effect] Next, the operation will be explained using FIGS. 1 and 5.

The adjusted power calculation means calculates the adjusted power f based on the time signal, the target demand, and the simple predicted demand value. Further, the predicted demand value calculation means calculates the predicted demand value τT based on the time signal and the measured power.

In the case of Fig. 5, the predicted demand value (R
1) exceeds the target demand value, the alarm signal generating means outputs an alarm signal. This alarm signal is loaded with the address code of the alarm means to issue the alarm by the transmission means, is converted into a serial signal (vr), and is output to the transmission path.The alarm control device called by the address code , operates the alarm means upon receiving the alarm signal.

Next, at point (Y), if the adjusted power value obtained from the predicted demand value exceeds the power capacity of the next input 'f'L load, the cutoff signal generating means outputs a cutoff signal.

After this signal is also loaded with an address code, it is sent out to the transmission line, and a predetermined load control device is called to cut off the load. The order of the loads to be cut off is set in advance by the control order setting means according to their importance.

Next, at point (Z), as a result of load cutting, the predicted demand value (R3) is lower than the target demand value. Here, when the load to be applied is selected according to the control method selected by the load control method setting means, the re-applying signal generating means outputs a re-applying signal, and the load is re-applying by the control signal setting means.

[Example] FIG. 2 shows an embodiment of the present invention.

FIG. 3 shows a flowchart 1 of the program executed in the arithmetic processing section (112).

The following will explain using both drawings.

Demand con!・Roll device control JI' unit (1
01) includes an input control section (106), a storage section (108),
Arithmetic processing section (112), signal transmission section (114), time limit section (118), limit u++ Jiff ft, setting section (12
0), jt load capacity 5k setting section (122), and load control method setting section (124).

The power used by the load (100A) to (100N) is
It is full'l by a wattmeter with a transmitting device (104) which is a power measuring means, and is output to an input control section (106) of a control unit (Lot). The input control unit converts the signal corresponding to the power consumption of each load from the transmitting device A.1 power N1 (104) into a predetermined signal (for example, an 8-bit digital signal). The arithmetic processing unit (112) counts the signals and stores the result in the storage unit (108). The arithmetic processing section (112) performs arithmetic processing according to the contents of a program stored in a storage means (not shown). It consists of a section and a re-input signal generating section.

This embodiment is characterized by a load capacity setting section (122) and fli! A J order setting section (120) and a load control method setting section (124) are provided. Load capacity setting section (122
)+J, ff1l is an external input device such as a keyboard, and is the origin of the demand control device.
This is means for setting the power capacity of each load controlled by the load control device (201), . . . at the time of ftJs. Similarly, the control order setting unit (120) is a means for setting the order in which each load is shut off and turned on again according to its importance. In addition, the load i1i control control film constant part (
124) is a priority system, a cyclic system, and a priority system.
11 from any of the control methods of Suiulic method
This is a means for selecting a method for controlling loads. The priority system is to cut off the J1 load by (100A) ÷ (100B
) + (100C) - (100D) ÷ (100E), re-injection is (IooE) + (1000) - + (1
00G) + (100B) → (100A)ノJllff
l: O,: Nai, load (100B) C load (100B)
A): It is cut off for the first time when it is in the 6' L or cut-off state,
In the same way, the load with lower priority of 1 and descendant is given higher priority f! 7: It is cut off only when all of the loads are in the cut-off state. In the cyclic method, load cutoff)4J'1 is (100A) -) - (100B) ÷ (1
00G) ÷ (1000) ÷ (100E), the load is cut off in this order regardless of whether the load force that has already been cut off is re-immersed.

The re-input order is 17 first, or the disconnected load is re-input in order. Furthermore, the priority cyclic method is 1, and the load cutoff order is (100A) ÷ (IooB) ÷ (10
If you set it in the order of 0C) ÷ (100D) - 1 - (100E), reloading will also be (100A) - "(100B) - (10
0C) ÷ (IooD), - (100E), the load (100B)l;i, the load (]0OA) is cut off for the first time when it is in the cutoff state, and it is turned on again for the first time when it is in the immersion state.

The arithmetic processing section (112) of the control unit (101) calculates the power consumption of the load converted into the predetermined signal and the time limit section (
118) and the program built in the demand value calculating section 11111, a predicted demand value is calculated (step (2)).

Next, based on the target demand value set in the set value storage unit (108) and the time limit m which is the output of the time limit unit (118), the adjusted power is adjusted according to the program built in the adjusted power calculation unit. Compute values. (Step (3)), and it is determined whether the predicted demand value exceeds the target demand value or not (Step (4)
)). If it is not exceeded, the process goes through step (10) and returns to step (1), and if it is exceeded, the first alarm signal is output according to the program built in the alarm signal generator (step (5)). This signal is converted into a serial signal by adding an address code in the signal transmission section (114), which is a signal transmission means, and is converted into a serial signal through the transmission path (114).
6). In this case, a twisted pair cable is sufficient for the transmission line (116) because the transmitted signal is read out by a preset clock and the voltage is from several volts to several tens of volts. Alarm buzzer (
130) to (13ON) and load (100A) to (1
00N) has its own address code and alarm control device! 1fc (301), -load flilJ 91
'l device (201), , l: Connected. Therefore, in this case, the first alarm will be sent to the enemy (1).
308), (130B),,, V-report system that controls! J1
Only one device (301) is called and receives the alarm signal. Furthermore, depending on the address code, an alarm buzzer (130A
) is allowed to create v1. This causes the first alarm buzzer to sound, indicating that the predicted demand value exceeds the target demand value.

Next, in step (6), the arithmetic processing unit (112) sets the adjusted power value by the load capacity setting unit (122) according to the program built in the cutoff signal generation unit, and stores it in the storage unit (108). Determine whether the power capacity exceeds the power capacity of the next load to be applied.
If it exceeds the limit, a second alarm is output and the alarm buzzer (130A) is activated in the same manner as above (Step (71), the signal transmission section (114) responds to the alarm buzzer It is added to the address code cutoff signal of the load (100A) and output to the transmission line (116) (step (
8)) The load control device (201) connected to the load (100A) receives the cutoff signal and then cuts off the power supply to the load (100A). Then, the process returns to step (1). In addition to the Vllj-blink, an alarm lamp or the like can also be used as the alarm means. A case will now be described in which the power consumption decreases and the predicted demand value becomes less than the target demand value.

In this case, step (4) is followed by step (9)/I
'Executed. Step (9) is to determine whether there is a cut-off load. In this case, since the f1 load has been cut off, the process proceeds to step (10).

In step (10), the adjusted power value, f
It is determined whether the capacity is more than a predetermined times (in this embodiment, more than 2 times) the capacity of the load. If it is less than twice, it is determined that there is not enough power to re-apply the power, and the process returns to step (1). If it is twice or more, the re-input order set in the control order setting section (120) and load control method setting section (124) is searched (step (11)), and a re-input signal is output. (Step (12)). This signal is sent out as a serial signal from the signal transmission line (128) with the address code of the load to be reinjected added. The load control device called by the address code applies the load corresponding to the address code.

The load control device (201) or alarm control device (301) installed near the load has a signal transmission section (202,
302), arithmetic processing section (204, 304), address setting section (206, 306), output control section (208, 308)
, load control section (210), alarm III control section (310)
), the signal transmission between the signal transmission section (114) and (202) or (302) is the exchange of serial signals loaded with an address code, as described above.

The arithmetic processing section (204, 304) is connected to the address setting section (20
The alarm buzzer or load that should output an alarm signal or cutoff signal is determined by comparing the data stored in An alarm signal is sent to the load control section (2).
10) Output a cutoff signal.

[Effects of the Invention] According to the present invention, the following effects can be obtained.

First, since it is equipped with a power restart signal generation means, power is temporarily cut off to a certain load during demand control, and then the power used decreases and the predicted demand value falls below the target demand value. In the event of a cigarette, power can be re-energized to the disconnected load.

Second, control order setting means and load i1r'l 91
Since one method setting means is provided, when the demand control device is activated, the order in which the load to be controlled is cut off and the order in which it is reinserted can be freely set, providing greater flexibility than conventional devices. It is also possible to provide a highly economical demand control device.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of the present invention, FIG. 2 is a diagram showing one embodiment, FIG. 3 is a diagram showing a flowchart of a program executed by the arithmetic processing unit (112), and FIG. 4 is a diagram showing a conventional system. The diagram illustrating the demand control device, Figure @5, is a diagram illustrating a graph illustrating the relationship between power consumption and time ffrf.

Claims (1)

[Claims] (1) Pulse input means that receives and counts the number of pulses from a wattmeter with a transmitter, converts it into a predetermined transmission signal, and outputs it, time signal generation means that generates a time signal, target demand value, and cutoff power value for each load. a set value storage means for storing the power capacity and the priority order of each load; a control order setting means for setting the control order and control method for each of the loads; a signal output from the pulse input means and the time signal. Predicted demand value calculation means for calculating a predicted demand value at the end of a demand time period; adjusted power value calculation means for calculating adjusted power from the predicted demand value, the time limit signal, and the target demand value; Alarm signal generation means for outputting an alarm signal when the adjusted power value exceeds a load capacity value to be applied next; When there is a cut-off load, a re-turn signal generating means outputs a re-turn signal when the predicted demand value is lower than the target demand value and the adjusted power value exceeds a predetermined times the power capacity of the cut-off load. , load control method setting means for selecting the control method set by the control order setting means when generating the re-on signal; an address code of the alarm control device to which the alarm signal should be given or the cutoff signal should be given; a signal transmission means that adds an address code of the load control device and sends out the alarm signal and the cutoff signal as a serial signal; an alarm control device; a load control device that is called by the address code of the serial signal and cuts off the load in response to the cutoff signal; a load capacity setting that allows setting the power capacity value of each of the loads to the set value storage means; A demand control device characterized by comprising means.