JPS6137851B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power load control device that can perform demand control while taking into account the environmental conditions of the load.

The demand monitoring and control device automatically manages the demand value. It predicts the demand value at the end of the demand time period from the momentary power consumption value, and if the demand value exceeds a preset value, it will fail. In response to a sudden load, a cut command is issued in stages to keep the demand value within a predetermined value. However, demand monitoring and control equipment unilaterally cuts the load so as not to exceed the demand value, so there are complaints from production sites about load cutting, and even though the demand is an urgent load that can be reduced, it cannot be controlled. There were many loads.

The present invention aims to easily perform demand control by incorporating load sensor conditions, performing demand control while taking into account environmental conditions of the load, and increasing the load subject to demand reduction.

Hereinafter, the overall system in an embodiment of the present invention will be explained with reference to FIG.

Reference numeral 1 indicates a demand monitoring and control device, and 2 indicates a group of demand control commands from the demand monitoring and control device 1. In an actual device, there are 5 to 8 groups of control commands. Here, in order to simplify the explanation, three groups of control commands are used.

3 is a master station that issues control commands to the power loads 17, 18, and 19; 4 is a communication line; 5, 6, and 7 are master stations 3
In response to the command, a control command is issued to the power load, and the sensor information of each power load, such as temperature sensor information 8, 9, 10, and the ON/OFF state of the power load are
This is a slave station that has the function of answering OFF statuses 14, 15, and 16 to the master station.

The master station 3 and the slave stations 5, 6, and 7 transmit signals through the communication line 4, and the master station 3 transmits sensor information 8, 9, and 10.
It has functions to measure and monitor and control power loads. In addition, it has a setting function for assigning each slave station to the three commands of the demand control command group 2 individually, and when a control command is issued from the demand monitoring control device 1, the command is assigned to the control command. A load cut command is issued to each slave station.

However, in this case, a load cut command is not issued for a load whose power load environment has deteriorated based on a comparison between sensor information and a control setting level, such as a temperature setting value. An example of preventing this deterioration of environmental conditions will be explained with reference to FIG. 2.

FIG. 2 is a block diagram of the master station.

20 is a demand monitoring control device, 21 is a demand control command for three groups, 26 is a digital switch for selecting or setting a slave station number,
24 is a digital switch for setting a control setting level (temperature setting value) for each slave station, and 22 is a digital switch for setting a control group for each slave station. 28 is an entry switch for inputting the set values of the digital switches 22, 24, and 26 into the microcomputer circuit 30; 29 is a changeover switch for setting the demand control group of each slave station and each control setting level of each slave station; It is.

The method of setting demand control group for each slave station is as follows.
Set the changeover switch 29 to the demand control group setting side, set the slave station number of the digital switch 26, select the demand group number of the slave station with the digital switch 22, and press the entry switch 28. The memory 3 in the microcomputer circuit 30
A demand control group number is set to the address of one selected slave station.

Next, a method of setting the control level of each slave station will be explained. The changeover switch 29 is switched to the control setting level setting. Select the slave station number of the digital switch 26. And digital switch 22
When the demand control group number and the control setting level of the digital switch 24 are set and the entry switch 28 is pressed, the temperature setting value for the demand control group of the digital switch 22 of the slave station selected by the digital switch 26 is stored in the memories 33 to 3.
The data is stored in the address of the slave station selected by the digital switch 26 of No. 5. 33 is the first demand control group, 34 is the second demand control group, 35
is the memory of the third demand control group. The memory 32 is a memory that stores the control setting level when the demand control group is "0", that is, when there is no demand control command.

40 is a communication line, and the answer signal from the slave station is converted into a parallel code by a serial/parallel conversion circuit 42 and sent to i/
The sensor information of each slave station is taken into the microcomputer circuit 30 through the o (input/output) line 41, and is stored at a predetermined address in the memory 36.
The ON/OFF status signal is stored at a predetermined address in the memory 37.

Next, a description will be given of control commands executed by comparing the memories 32, 33, 34, and 35 for control setting levels of a total of four groups with the sensor information memory 36.

When there is no demand control command 21, the control level is fixed by the memory 32;
A control command is given to each power load by the memory 36. Next, when the first demand control command is input to the microcomputer circuit 30, the control level is fixed in the memory 33, and the memory 33 becomes the control setting level and is controlled.

Thereafter, in the case of the second and third demand control commands, the memories 34 and 35 are controlled at the control setting level. The control signal 38 is then output as a parallel signal, converted into parallel and serial signals by a conversion circuit 39, and transmitted to each slave station through a communication line 40 to control the power load.

As described above, according to the present invention, by appropriately setting the control setting level of the memory, even if a demand control command is issued, the control command can be issued while taking into account the environmental conditions of the power load.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the overall system of a power load control device according to an embodiment of the present invention, and FIG. 2 is a block diagram of a master station in the same device. 1, 20... Demand monitoring control device, 3... Master station, 4... Communication line, 5, 6, 7... Slave station.

Claims (1)

[Claims] 1. In a device that has a master station, a communication line, and a plurality of slave stations, and remotely controls a plurality of distributed power loads, the master station transmits the distributed load to which the slave station belongs from each slave station. a means for collecting and storing environmental information; a means for inputting a plurality of group control commands from the outside; a control setting level for each slave station when there is no group control command; and a means for inputting a plurality of group control commands for each slave station; means for providing a corresponding control setting level; means for comparing the control setting level set corresponding to the input according to the input status of the group control command with the stored environmental information of the distributed load; and the result of this comparison. , for each slave station
A power load control device equipped with means for issuing ON/OFF control commands. 2. The power load control device according to claim 1, wherein the plurality of group control commands from the outside are control command outputs from a demand control device.