JPH05284672A - Central load controller - Google Patents

Abstract

PURPOSE:To dispense with the construction of a dedicated control line for transmitting load control signals to a load controller from a master station unit and to constitute a central load controller easily at a low cost. CONSTITUTION:A central load controller is constituted of a master station unit 1 transmitting load control signals provided with a specific control code when the need of load control arises, a switching office 2 relaying the load control signals from the master station unit 1, an adapter 21 placing the load control signals from the switching office 2 on a distribution line 9 and a load controller 20 receiving the load control signals from the distribution line 9 and deciding on whether the load controller 21 is a specific control system of the load control signals or not and making on and off control to the distribution line 9 of load 4 in accordance with a decision result, and the distribution line 9 is used for a transmission line to make unnecessary the construction of a dedicated control line.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a load centralized control device for controlling loads such as a cooler of a large number of general consumers connected to a wiring line feeder from a distance according to the balance of supply of an electric power company. is there.

[0002]

2. Description of the Related Art FIG. 13 is a block diagram showing a conventional load concentration control apparatus. In the figure, 1 is a master station apparatus installed in a sales office or the like, 2 is a relay station installed in a substation or the like, and 3 is a relay station. A load control device, 4 is a load, 5 is a transmission line such as a communication line connecting the relay station 2 and each load control device 3, 6 is a transformer, 7 is a circuit breaker, 8 is a section switch, and 9 is a load 4 It is a distribution line that feeds to.

FIG. 14 is a block diagram showing the load control device 3, wherein 10 is a communication interface and 11 is a CP.
U and 12 are memories, 13 is a digital output interface, 14 is an output relay, 15 is its contact, and 16 is a dedicated control line drawn to the load 4.

Next, the operation will be described.

When the demand for electric power suddenly increases and it becomes necessary to cut off a part of a plurality of loads 4, the relay station 2 and the transmission line 5 installed in a substation or the like are operated from the parent station device 1 of the sales office. A load control signal is sent to each load control device 3 via the load control device 3.

In each load control device 3, a signal sent from the transmission line 5 is sent to the CPU 1 through the communication interface 10.
1, the CPU 11 performs the above-mentioned signal processing according to the program stored in the memory 12,
The output relay 14 is operated via the digital output interface 13. When the contact 15 of the output relay 14 is turned on or off, the power supply to the load 4 is turned on or off through the control line 16. The centralized load control is to sequentially repeat the above-mentioned operation in response to a command from the master station device 1 to control the total amount of load.

[0007]

Since the conventional load centralized control device is constructed as described above, it is necessary to lay a dedicated control line from the load control device to each load, and to connect and disconnect each load. When the control frequency increases, the processing amount of the master station device and the relay station may increase and the processing may not be completed. In addition, when the load is, for example, an inverter air conditioner, the operation exceeds the rated output immediately after ON control, and the expected load reduction cannot be realized, or the load unilaterally designated by the master station device stops. However, there is a problem that the work is hindered.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and eliminates the need for laying a dedicated line up to each load, and a part of the load control device installed for each load is repeated. An object of the present invention is to obtain a load centralized control device that executes control and controls from a load that does not hinder work according to a set priority.

[0009]

According to a first aspect of the present invention, there is provided a centralized load control apparatus, which transmits a load control signal having a predetermined control code when the need for load control arises, and a main station apparatus. A relay station that relays the load control signal from the master station device, a coupling device that superimposes the load control signal from the relay station on the distribution line, and a load device that receives the load control signal from the distribution line and loads the load control signal by itself. It is provided with a load control device that determines whether or not the control target is designated by the control signal and controls the on / off of the load to and from the distribution line according to the determination result.

According to a second aspect of the present invention, there is provided a centralized load control apparatus, a master station apparatus for transmitting a load control signal having a predetermined control code when load control is required, and a load from the master station apparatus. A relay station that relays the control signal, a transmitter that wirelessly transmits the load control signal from the relay station, and a control target that the load control signal wirelessly transmitted is received and is designated by the load control signal. It is provided with a load control device for determining whether or not the load is connected to the distribution line according to the determination result.

According to a third aspect of the present invention, there is provided a centralized load control apparatus, a master station apparatus for transmitting a load control signal having a predetermined control code when load control is required, and a load from the master station apparatus. A relay station that relays a control signal, and determines whether or not it is a control target specified by the load control signal by receiving the load control signal from this relay station, and according to the determination result, a load control end signal or a preset timer. And a load control device for continuing the on / off control of the load to the distribution line until the time-up signal is received. According to another aspect of the present invention, there is provided a load centralized control device which, when load control is required, transmits a load control signal having a predetermined control code to a master station device and a load control signal from the master station device. The relay station that relays and the load control signal from this relay station is received to determine whether or not it is the control target specified by the load control signal, and according to the determination result, the load control end signal or the time of the presott timer. And a load control device for prohibiting the inverter operation of the load until the up signal is received and performing the load operation of a constant load amount.

According to another aspect of the present invention, there is provided a centralized load control apparatus, which transmits a load control signal having a predetermined control code including a stop time signal when a load control is required, and the main station apparatus. Relay station that relays the load control signal from the relay station and the load control signal from this relay station, and determines whether or not it is the control target specified by the load control signal, and the stop time is short according to the determination result. In this case, only the outdoor unit of the load is stopped, and when the stop time is long, the load control device for stopping the outdoor unit and the indoor unit of the load is provided.

According to another aspect of the present invention, there is provided a centralized control device for transmitting a load control signal of a predetermined control code to a master station device and a load control signal from the master station device when load control is required. The relay station that relays and the load control signal from this relay station is received to determine whether or not it is the control target specified by the load control signal, and according to the determination result, a load with a low priority set in advance. And a load control device for recording the control contents.

[0014]

According to the load concentration control device of the invention of claim 1,
The load control signal transmitted from the master station device is transmitted by superimposing it on the distribution line, and the on / off control of the load to the distribution line is performed according to the judgment result of the load control device that received the load control signal from this distribution line. As a result, it is not necessary to provide a dedicated control line between the master station device and the load control device, and the installation work is simplified.

According to the invention of claim 2, the load centralized control device does not need to provide a dedicated control line as in the invention of claim 1 by wirelessly transmitting the load control signal from the master station device. The effect is obtained.

According to a third aspect of the present invention, the load centralized control device continues the control of connecting / disconnecting the load to / from the distribution line until it receives the load control end signal or the preset timer time-up signal according to the determination result of the load control device. As a result, the processing load on the master station device and the relay device can be significantly reduced.

According to a fourth aspect of the present invention, the load centralized control device prohibits the inverter operation of the load according to the determination result of the load control device until a load control end signal or a preset timer time-up signal is received. By performing the load operation, the load control effect calculated by the master station device can be expected.

According to the determination result of the load control device, the load centralized control device stops only the outdoor unit of the load when the stop time of the load is short, and the outdoor unit of the load when the stop time is long. By controlling the air conditioner and the indoor unit so as to be stopped, it is possible to reduce the discomfort of the occupants and facilitate cooperation with the load control.

According to a sixth aspect of the present invention, the load concentration control device performs load control by performing on / off control to the distribution line in order from a load having a lower priority set in advance according to the determination result of the load control device. Customers' opinions can be reflected.

[0020]

Embodiment 1 Hereinafter, Embodiment 1 of the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 is a master station device that transmits a load control signal having a predetermined control code, and 2 is a master station device 1.
Relay station for relaying and converting load control signals from
Is a load, 6 is a transformer, 7 is a circuit breaker, 8 is a section switch,
Reference numeral 9 is a distribution line for feeding a large number of loads 4, 20 is a load control device provided for each load, and 21 is a coupling device for superimposing (injecting) a load control signal from the relay station on the distribution line 9.

FIG. 2 is a detailed view showing the connection relationship between the load control device 20 and the load 4 shown in FIG. 1. In FIG. 2, 31 is a communication interface, 32 is a CPU, 33 is a memory,
Reference numeral 34 is a setting circuit, 35 is a digital output interface, 36 is a control circuit, and 37 is an actual load such as a motor. In this embodiment, the control circuit 36 and the actual load 37 constitute the load 4, but the control circuit 36 may be provided in the load control circuit 20.

Next, the operation will be described. When the need for load control arises, a load control signal is sent from the master station device 1 to the relay station 2 installed in a substation or the like. In the relay station 2, the carrier frequency and the transmission speed are converted into low ones so that they can be sent on the distribution line 9, and the load control signal is superimposed on the distribution line 9 via the coupling device 21 composed of a capacitor and a transformer. .. The superimposed signal is transmitted to each load control device 20 via a distribution line 9 and a distribution device (not shown) such as a pole transformer.

In each load control device 20, as shown in FIG.
CPU via communication interface 31 such as a filter
32 loads the load control signal into the memory 33, collates this load control signal with the type and unique number set in the setting circuit 34, for example, shown in FIG. If it is determined to be a control target, a control signal is sent to the control circuit 36 via the digital output interface 35, and the control circuit 3
The actual load 37 is controlled according to the output signal of 6.

The load control signal may be a signal designating each load or a group designating signal for simultaneously controlling a plurality of loads.

Embodiment 2 In Embodiment 1, the distribution line 9 is used for transmission of a load control signal. In Embodiment 2, as shown in FIG. 4, the relay station 2 is used.
After the load control signal is sent out as a radio wave from the transmitter 22 attached to the antenna via the antenna 22a and the load control signal is received by the receiver / load controller 23 provided for each load via the antenna 23a, The same processing as 1 is performed.

In the case of the second embodiment in which the wireless is used to transmit the load control signal, it is not necessary to provide the relay station 2 at each substation, and the number of relay stations can be reduced according to the intensity of the output radio wave. it can.

Embodiment 3 In each of the above-mentioned embodiments, the case where the master station device 1 successively outputs the load control signal has been described. However, in the load control, generally, ON and OF at a constant interval over a certain time zone such as afternoon.
If there are many patterns that repeat F control and the frequency increases,
The processing capacity of the master station device 1 and the relay station 2 may be exceeded.

Therefore, in the third embodiment, as shown in FIG.
A control pattern which is generally used is stored in the memory 33 in the load control device 20 in a format as shown in FIG. 6, and after receiving the load control start signal and the load control pattern signal from the master station device 1, The load control device 20 continues to locally send a control signal to the control circuit 36 in accordance with this control pattern.

Then, when the load control end signal is received from the master station device 1 or when a preset timer (not shown) provided for the case where the signal cannot be received for a long time is up, the above signal transmission is performed. To stop the load control. By thus performing the load control, it is possible to achieve the same effects as those of the above-described embodiments, while significantly reducing the load on the master station device and the relay station.

Fourth Embodiment In each of the above embodiments, assuming that the capacity of each load is constant and does not change, the master station device 1 calculates the required load control amount based on the rated value and the like, and the load is calculated based on this calculation result. Although the control signal was sent, if the load 4 is an inverter air conditioner, etc., if it is turned off for a certain period of time and then turned on, the power consumption will be increased in order to cool rapidly, and the expected effect can be obtained with the planned load control amount. There are cases where it is not possible.

Therefore, in the fourth embodiment, as shown in FIGS. 7 and 8, the load control device 20 receives the load control signal,
After reading the contents, the load control start signal, the load control end signal, and the ON / OFF control signal are transmitted to the control circuit 36, and after the load control start signal is received in the control circuit 36, until the load control end signal is received, or Preset timer 43
Until the time amplifier, the flip-flop circuit 40 is set to the set state, the inverter operation is prohibited by the output of the one terminal, and at the same time, the output of the AND circuit 42 is ON / OFF controlled as the load control of constant power consumption. The load control amount as calculated by the device 1 can be expected.

Then, either the load control end signal or the time-up signal of the preset timer 43 is applied to the OR circuit 4.
By passing 1, the flip-flop 40 is reset, its 1-terminal output becomes 0, the AND circuit 42 becomes non-logical state, and the load control is changed from ON / OFF control to inverter operation.

Fifth Embodiment When the load 4 such as a cooler is controlled by the above load control, in the case of a short stop, only the outdoor unit and the heat source unit are stopped, and the operation of the indoor unit is continued to It is necessary to try to reduce the discomfort of workers and make it easier to obtain cooperation for load control.

Therefore, in the fifth embodiment, as shown in the configuration diagrams and flowcharts of FIGS. 9 and 10, it is determined whether the time for which the load 4 is stopped after receiving the load control signal is equal to or more than a predetermined constant value K. (ST10-1) If YES, a stop command is sent to both the indoor unit 38 and the outdoor unit 39 (ST10-2, ST10-3), and if the judgment result in ST10-1 is NO, ST10-3. To the outdoor unit 3
The stop command is sent only to the switch 9.

Sixth Embodiment In each of the above-described embodiments, the control target is unilaterally determined by the master station device 1, and the opinion of the consumer side is not reflected. For this reason, the load to be controlled may change depending on the business situation on the consumer side, but this case cannot be dealt with.

Therefore, in the sixth embodiment, as a setting content of the setting circuit 34 shown in FIG. 11, a priority number indicating priority is added in addition to the type and the unique number as shown in FIG. When the same contractor owns multiple loads of the same capacity, it is assumed that the unique number is the same number and the load is controlled by the customer at any time. The load is controlled in ascending order of priority number.

When the capacities of the loads 4 are different, by assigning the priority numbers to the jump numbers corresponding to the numbers proportional to the capacities, the load capacities in the respective consumers when viewed from the master station device 1 are considered. Without considering the number of units, it is possible to output load control signals, etc. that cut off loads of priority XX and below uniformly.

Further, in order to prevent the customer from trying to escape the load cutoff by raising the priority number, the counter 40 measures the number of days and the time when the load control is performed, and reflects it when calculating the charge discount. It is a thing.

[0040]

As described above, according to the first or second aspect of the present invention, the load control signal from the master station device is superposed on the distribution line or wirelessly transmitted to the load control device. There is no need to provide a dedicated control line from the load control device to the load control device, and installation work of the load centralized control device is simple.

According to the third aspect of the present invention, the load control device continues the connection / disconnection control of the load to the distribution line until the load control end signal or the preset timer time-up signal is received. The processing load on the relay device can be significantly reduced.

According to the invention of claim 4, the load control device prohibits the inverter operation of the load and performs the load operation of a constant load amount until the load control end signal or the preset time-up signal is received. The load control effect as calculated by the station device can be expected.

According to the fifth aspect of the present invention, when the load stop time is short, only the load outdoor unit is stopped, and when the load stop time is long, the load outdoor unit and the indoor unit are stopped. Since the control is performed by the device, it is possible to reduce the discomfort of the occupants and facilitate the cooperation for the load control.

According to the invention of claim 6, the load control device controls the connection / disconnection of the distribution line in order from the load having a preset priority, that is, the load having the lowest priority number. It is possible to obtain effects such as being able to reflect.

[Brief description of drawings]

FIG. 1 is a block diagram showing a load concentration control device according to an embodiment of the present invention.

FIG. 2 is a detailed diagram showing a connection relationship between a load control device and a load in the embodiment.

FIG. 3 is a pattern diagram of a load control signal used in the embodiment.

FIG. 4 is a block diagram showing a load concentration control device according to an embodiment of the present invention.

FIG. 5 is a detailed diagram showing a connection relationship between a load control device and a load according to an embodiment of the invention of claim 3;

FIG. 6 is a control pattern diagram used in the embodiment of FIG.

FIG. 7 is a detailed diagram showing a connection relationship between a load control device and a load according to an embodiment of the invention of claim 4;

FIG. 8 is a detailed diagram showing a control circuit of the embodiment of FIG.

FIG. 9 is a detailed diagram showing a connection relationship between a load control device and a load according to an embodiment of the invention of claim 5;

FIG. 10 is a flow chart illustrating the operation of the embodiment of FIG.

FIG. 11 is a detailed diagram showing a connection relationship between a load control device and a load according to the embodiment of the invention of claim 6;

12 is a pattern diagram of a load control signal used in the embodiment of FIG.

FIG. 13 is a block diagram of a conventional load concentration control device.

14 is a detailed diagram of a load control device in the device of FIG.

[Explanation of symbols]

 1 Master station device 2 Relay station 4 Load 9 Distribution line 20 Load control device 21 Coupling device 33 Memory 34 Setting circuit 36 Control circuit 38 Indoor unit 39 Outdoor unit

Claims (6)

[Claims] 1. A load centralized control device for remotely controlling loads of a plurality of consumers connected to a distribution line, when a load control is required, a load control signal having a predetermined control code is transmitted. A master station device, a relay station that relays a load control signal from the master station device, a coupling device that superimposes the load control signal from the relay station on the distribution line, and the load control signal from the distribution line. A load centralized control device comprising: a load control device that receives and determines whether or not it is a control target designated by the load control signal, and performs on / off control of a load to and from the distribution line according to the determination result. 2. A load centralized control device for remotely controlling loads of a plurality of customers connected to a distribution line, when a load control is required, a load control signal having a predetermined control code is transmitted. A master station device, a relay station that relays a load control signal from the master station device, a transmitter that wirelessly transmits the load control signal from the relay station, and a receiver that receives the wirelessly transmitted load control signal. A load centralized control device, comprising: a load control device that determines whether or not it is a control target specified by the load control signal, and performs on / off control of a load to the distribution line according to the determination result. 3. A load centralized control device for controlling loads of a plurality of customers connected to a distribution line from a distance, when a load control is required, a load control signal having a predetermined control code is transmitted. The master station device, a relay station that relays the load control signal from the master station device, and the load control signal from the relay station, and determines whether or not it is the control target instructed by the load control signal. A load centralized control device, comprising: a load control device that continues to control connection and disconnection of a load to and from the distribution line until a load control end signal or a preset timer time-up signal is received according to the determination result. 4. A load centralized control device for remotely controlling loads of a plurality of customers connected to a distribution line, when a load control is required, a load control signal having a predetermined control code is transmitted. The master station device, a relay station that relays the load control signal from the master station device, and the load control signal from the relay station, and determines whether or not it is the control target specified by the load control signal. A load centralized control device comprising: a load control device that prohibits inverter operation of a load and performs a load operation of a constant load amount until a load control end signal or a preset timer time-up signal is received according to the determination result. 5. A load centralized control device for remotely controlling loads of a plurality of customers connected to a distribution line, when load control becomes necessary, a load control signal of a predetermined control code including a stop time signal. Of the master station device, the relay station that relays the load control signal from the master station device, and whether the self control device receives the load control signal from the relay station and is the control target specified by the load control signal. According to the result of the determination, if the stop time is short, only the outdoor unit of the load is stopped, and if the stop time is long, the load centralized control device including a load control device for stopping the outdoor unit and the indoor unit of the load .. 6. In a load centralized control device for controlling loads of a plurality of customers connected to a distribution line from a distance, when a load control is required, a master station which transmits a load control signal of a predetermined control code. A device, a relay station that relays a load control signal from this master station device, and a device that receives the load control signal from this relay station and determines whether or not it is a control target specified by the load control signal. A load centralized control device comprising: a load control device that controls a load having a low priority level set in advance and records the control content according to a determination result.