JP3460901B2 - Power demand control device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power load group having a lower importance level (interruption level) and is started and stopped in order so that a predicted power consumption does not exceed a target power consumption. The present invention relates to a power demand control device that shuts off power loads in order of priority. 2. Description of the Related Art A power demand control device is included in a monitoring control system for monitoring and controlling equipment (power load) in a facility such as a building, and is used when a predicted power consumption exceeds a target power consumption. In accordance with the excess amount, the devices are sequentially stopped from the device group of the lower importance (interruption level). This allows
The actual power consumption can be suppressed below the target power consumption. The specific configuration of this power demand control device is described in detail in Japanese Patent Publication No. 3-28895 ("Distributed power demand control method"), and a description thereof will be omitted. The main control device of the power demand control device includes a CRT, and a screen related to the power demand control is displayed on the CRT, for example, as illustrated in FIGS. 8 and 9. [0003] Some of the devices to be controlled include:
In some cases, the start and stop order is operated in rotation.
That is, for the sake of maintenance, the start / stop priority (start / stop priority) is changed every time a predetermined time elapses so that the cumulative operation times of a plurality of devices of the same type do not vary (see FIG. 10). . This rotation is automatically performed by the monitoring control system. So, in this case,
The devices are stopped in order from the device group with the lowest interruption level and from the device with the highest start / stop priority. However, according to such a conventional power demand control device, the order of devices to be stopped is not displayed. That is, as can be seen from FIG. 9, the power consumption, the predicted power consumption, the target power, the cutoff level, and the like are displayed.
The devices to be stopped and their order are not displayed. For this reason, at the time when the power demand control is performed, it is unclear in what order the devices will be stopped, which has been anxious to the building manager. SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a reliable and clear display of a power supply cutoff sequence in addition to a cutoff level, thereby enabling a building manager It is an object of the present invention to provide a power demand control device that can eliminate anxiety of the user. [0006] In order to achieve the above object, the present invention provides a power demand control apparatus as described above, in which a predicted power consumption is calculated from a power consumption actually used. If the estimated power usage exceeds the target power,
Shutdown information generating means for generating shutoff information according to the excess amount, equipment database means storing start / stop priority information and shutoff level information of each power load, and shutoff information and equipment database means from the shutoff information generating means A power load to be interrupted from the power load start / stop priority information and the cutoff level information stored in the power load, and outputs the determined power load start / stop priority, cutoff scheduled time, and cutoff level Means, display means for displaying the power load start / stop priority , scheduled cutoff time, and cutoff level from the processing means, and a screen display database means for storing drawing information indicating the installation status of each power load. , Priority of power load from processing means on the drawing created from drawing information read from screen display database means, scheduled to be cut off It is obtained so as to display the time and cutoff levels. According to the present invention, the predicted power consumption is calculated from the actually used power, and when the predicted power exceeds the target power, the cutoff information (blocking level or cutoff) corresponding to the excess power is calculated. Including the number of power loads to be performed, the scheduled cutoff time, and the like. Then, a power load to be cut off is determined from the cutoff information, the power supply start / stop priority information and the cutoff level information, and the determined power load start / stop priority , cutoff scheduled time and cutoff level are displayed on the screen. Displayed above. For example, if the interruption level included in the interruption information is “1” and the number of power loads to be interrupted is “2”
If the scheduled cutoff time is “14:00” , two power loads are determined in descending order of the start / stop priority from those with a cutoff level of “1”, and the determined power load Start / stop priority ("", "") , scheduled shutdown time "1
4:00 ” and the cutoff level (“ 1 ”) are displayed on the screen. [0010] The present invention will be described in detail below based on embodiments. FIG. 2 is a diagram showing a main part of a building monitoring and control system including an embodiment of the present invention. In the figure, 1-1 to 1-n are the first to nth floors of the building, and common equipment, which is omitted in the figure, for various devices in the first to nth floors 1-1 to 1-n. The power supply is performed by the power distribution path of the power supply, and the total power consumption on the floors 1-1 to 1-n is actually measured by the power meter 2 for demand connected to these power supply base points. Transmits a pulse signal or the like every time a certain amount of power is accumulated. In each of the floors 1-1 to 1-n,
A control device (hereinafter referred to as D
CU) 3-1 to 3-n are provided for each of the data transmission lines 4-1 to 4-1 and a data collection device (hereinafter, DG).
P) On / off control of power supply to each device omitted in the figure is performed via 5-1 to 5-m, and D
The CUs 3-1 to 3-n include a main control device (hereinafter, MCU) 6 and an operation terminal device (hereinafter, referred to as MCU) provided in a central monitoring room.
OI) 7 and the communication path 8 in common.
6 for data transmission and reception, and also performs control according to instructions from the MCU 6. The MCU 6 includes a processor, a memory, and the like, while the OI 7 includes a cathode ray tube display device, a keyboard, a display panel, and the like. The MCU 6 and the DCU 3-1 are operated by operating the OI 7. Commands and data necessary for control can be set and updated, and the MCU 6 and DCU 3-1 can be set.
... 3-n can be monitored. However, DCUs 3-1 to 3-n and MCU 6 also have OI 7
And similar equipment is attached. Here, the output of wattmeter 2 is DGP ·
5-M is supplied to the MCU 6 through the DCU 3-1. The MCU 6 counts the pulse signal from the wattmeter 2 every unit time of, for example, 3 minutes.
After sequentially measuring the total power consumption per unit time (3 minutes) on the floors 1-1 to 1-n, the total power consumption during a predetermined time of, for example, 30 minutes is predicted based on the actually measured values.
The difference between the target power amount and the predicted power consumption exceeding the target power amount is set as the adjustment power. The above-mentioned "prediction of the total power consumption during a predetermined time" is performed, for example, as follows. That is, the floor 1 within a predetermined time (30 minutes) to be predicted
The total power consumption per unit time (3 minutes) at 1 to 1-n is sequentially measured, and the measured values are averaged to obtain an average power consumption per unit time (3 minutes). The power consumption is multiplied by 10 to obtain a predicted value of the total power consumption during a predetermined time (30 minutes). FIG. 1 is a functional block diagram showing a main part of the MCU 6. An input device 9 such as a CRT 8 and a keyboard is connected to the MCU 6. The processing unit 6-1, the prediction unit 6-2, the display control unit 6-3, the power demand database 6-4, and the device database 6 -5 and a screen display database 6-6. As shown in FIG. 3, the equipment database 6-5 includes “equipment addresses”, “models”, “installation locations”, “interruption levels”, “interruption levels” of various equipments on the floors 1-1 to 1-n. Device data such as “rating”, “operation”, “start / stop priority”, and “current status” are stored. In the device database 6-5, the start / stop data is updated each time the building monitoring and control system performs a rotate process, that is, every time the start / stop priority is replaced. In this case, the non-rotated devices, that is, the sequential devices, are not updated because the start / stop priority is fixedly determined. The screen display database 6-6 stores drawing information indicating the installation status (installation locations and connection relationships) of various devices on the floors 1-1 to 1-n. The power demand database 6-4 stores, as power demand data (interruption information), a result calculated by the prediction unit 6-2 and data relating to control performed based on the result. The power demand data stored in the power demand database 6-4 is updated every time new data is provided from the prediction unit 6-2. Next, the characteristic processing operation of the MCU 6 will be described with reference to the functions of the processing unit 6-1 and the prediction unit 6-2. The predicting unit 6-2 sequentially measures the total power consumption per unit time (3 minutes) on the floors 1-1 to 1-n, and based on the measured values, for example, a predetermined time of 30 minutes. Estimate the total amount of power used inside. The prediction of the total power consumption has been described above. Then, when the predicted power consumption exceeds the target power consumption, the prediction unit 6-2 generates power demand data corresponding to the excess power consumption and stores it in the power demand database 6-4. FIG. 4 illustrates power demand data stored in the power demand database 6-4. In this embodiment, the power demand data is
"Interruption level", "Rating of shutting down (stop) equipment",
The "number of devices to be cut off (stopped)", "scheduled (stopped) scheduled time", and the like. If there is a display request (request from the operator) for the control status of the power demand control via the input device 9, the processing unit 6-1 determines whether the predicted power consumption exceeds the target power consumption. (Step 501 shown in FIG. 5). If the predicted power consumption does not exceed the target power consumption, the fact is displayed on the screen of the CRT 8 and the process is terminated (Step 506 ). If so, the power demand data is read from the power demand database 6-4 (step 502). Further, the processing unit 6-1 includes:
The device data is read from the device database 6-5 (step 503). Then, the processing unit 6-1 determines a device to be stopped based on the read power demand data and the device data (step 504). For example, if the cutoff level of the power demand data is “1”, the rating is “20”, the number is “2”, and the scheduled cutoff time is “14:00”, the cutoff level is “1” and the rating is An operating device of “20” is selected, and two devices are determined as devices to be stopped from the selected devices in descending order of start / stop priority. Then, the processing unit 6-1 outputs the determined start / stop priority, scheduled cutoff time, and cutoff level of the device to the CRT 8 via the display control unit 6-3. At this time, the processing unit 6-1 reads out the drawing information indicating the installation status of the determined device from the screen display database 6-6 (step 505), and combines the drawing information with the determined start / stop of the device. The ranking, scheduled cutoff time, and cutoff level are output to the CRT 8 via the display control unit 6-3. As a result, on the screen of the CRT 8, the start / stop priority of the equipment to be stopped, the scheduled cutoff time, and the cutoff time are displayed on the drawing created from the drawing information read from the screen display database 6-6. The interruption level is displayed (step 506). FIG. 6 shows a display example in this case. In this display example, in the drawing showing the installation status of the equipment,
The symbol of the device to be stopped is displayed in a discolored black color (hatched in the figure), and the shutdown level, start / stop priority, and scheduled shutdown time are displayed adjacent to this symbol. [0023] In this embodiment, when there is a request from the operator, on the assumption that the predicted amount of electric power used exceeds the target power amount, the device should stop the chronograph coupling order and cutoff levels Although the scheduled cutoff time is displayed on the screen, it may be automatically displayed on the screen when the predicted power consumption exceeds the target power consumption. According to apparent the present invention from what has been described, according to the present invention above, the predicted electric power consumption from the amount of power used in actual is calculated, the predicted electric power consumption exceeds the target amount of power And interruption information (information including an interruption level, the number of electric loads to be interrupted, a scheduled interruption time, etc.) according to the excess amount, and the interruption information, the start / stop priority information of each electric load, and the interruption level information The power load to be interrupted is determined from the power load and the determined power load start / stop priority, shutdown scheduled time, and shutdown level are displayed on the screen, and the presence or absence of the power load operated in rotation is determined. Regardless of which power level at which power level is to be interrupted, in what order the power load is interrupted, and when it is interrupted, it is possible to clearly and clearly display on the screen. It becomes possible to know, and the anxiety of the building manager can be resolved. In addition, the start / stop priority, scheduled cutoff time and cutoff level of the cutoff power load are displayed on the drawing showing the installation status, so that information on the cutoff power load can be quickly grasped on the screen. Will be able to

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a functional block diagram showing a main part of a main control unit (MCU) in the building monitoring and control system shown in FIG. FIG. 2 is a diagram showing a main part of a building monitoring and control system including an embodiment of the present invention. FIG. 3 is a diagram exemplifying device data stored in a device database of an MCU shown in FIG. 1; 4 is a diagram illustrating power demand data stored in a power demand database of the MCU shown in FIG. 1; FIG. 5 is a flowchart for explaining a characteristic processing operation of the MCU shown in FIG. 1; FIG. 6 is a diagram exemplifying a display status of start / stop priority, scheduled cutoff time, and cutoff level of a device to be stopped; FIG. 7 is a diagram illustrating another example of the display status of the start / stop priority, scheduled cutoff time, and cutoff level of a device to be stopped. FIG. 8 is a diagram showing an example of a screen related to a conventional power demand. FIG. 9 is a diagram showing an example of a screen related to a conventional power demand. FIG. 10 is a diagram for explaining switching of start and stop priorities when the order of start and stop is operated in rotation. [Description of Signs] 6 MCU (main controller), 6-1 processing unit, 6-2 ...
Prediction unit 6-3 Display control unit 6-4 Power demand database 6-5 Device database 6-6 Screen display database 8 CRT 9 Input device

──────────────────────────────────────────────────続 き Continuing on the front page (72) Hideo Nakagawa 1-4-3, Roppongi, Minato-ku, Tokyo Inside NTT Facilities Corporation (72) Inventor Hiroshi Nakamura 2-chome, Shibuya, Shibuya-ku, Tokyo No. 12-19 Yamatake Honeywell Co., Ltd. (72) Inventor Shin Tsubaki 2-12-19 Shibuya, Shibuya-ku, Tokyo Yamatake Honeywell Co., Ltd. (56) References JP-A-5-308724 (JP, A) JP JP-A-8-317565 (JP, A) JP-A-1-202122 (JP, A) JP-A-59-8243 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02J 3 / 00-5/00

Claims (1)

(57) [Claims] [Claim 1] In order from the power load group with the lower importance (interruption level) and the power load with the higher start / stop priority so that the predicted power consumption does not exceed the target power amount. In the power demand control device that cuts off in order, the predicted power consumption is calculated from the actually used power, and if the predicted power exceeds the target power, shutoff information corresponding to the excess is generated. Shutdown information generating means, device database means storing start / stop priority information and cutoff level information of each power load, cutoff information from the cutoff information generating means and the power load of each power load stored in the device database means. A process for determining a power load to be interrupted from the start / stop priority information and the cutoff level information, and outputting the determined start / stop priority, cutoff time, and cutoff level of the power load. Means, start-stop priority power load from the processing means, blocking schedule
Display means for displaying a time and a cutoff level; and a screen display database means for storing drawing information indicating the installation status of each power load, wherein the display means is provided based on drawing information read from the screen displaying database means. A power demand control device, which displays a priority order of starting and stopping a power load from the processing means, a scheduled cutoff time, and a cutoff level on a created drawing.