JP3092623U - Load controller for electronic wattmeter for multiple loads - Google Patents

Abstract

(57) [Summary] Central processing for processing and storing data whose power amount has been calculated by installing switches on a main power supply line supplied with external power supply and individual supply lines branched therefrom, respectively. An object of the present invention is to provide a load control device for an electronic watt-hour meter for multiple loads, in which the operation of each switch can be controlled by the device. SOLUTION: A main switch 72 capable of controlling the supply of external power is installed on a main power line 7 to which power is supplied from the outside,
Each of the individual supply lines 8, 8a, 8b, 8c branched from the main power supply line 7 and supplying power for each load is provided with a current sensor 1, 1a, 1b, 1 for detecting a phase current supplied for each load.
c and auxiliary switches 82, 82 that can control the supply of individual power.
a, 82b, 82c are installed, and the main switch 72 and the auxiliary switches 82, 82a, 82b, 82c are controlled by the central processing unit 3.
And the commands are transmitted to the central processing unit 3 through the communication port.

Description

[Detailed description of the invention]     [0001]   [Technical field to which the invention belongs] The present invention relates to a load control device for an electronic watt-hour meter for multiple loads. In other words, one electronic watt-hour meter has many outputs and measures the electrical load of each output. And by equipping the output unit with a device that can selectively control the power supply, Can measure and control power consumption for multiple loads using the electronic watt-hour meter It is like that.     [0002]   [Prior art] Recently, the maximum power consumption has increased in the summer of every year with the rapid increase in power consumption, Concerns about peak and shortage of power when needed are growing. So, seasonal rates Setting of categories and time periods in which the electricity rate at night when light usage is low is lower than during the daytime on weekdays. Excessive use of electricity, such as setting different tariff categories and introducing a progressive tariff system, in terms of tariffs The fact is that saving measures are being promoted through measures to suppress them.     [0003] Therefore, in places with heavy usage such as industrial bodies and multi-family homes, a pre- Through the use of a certain amount of high-pressure contract power to ensure appropriate power supply Both use a peak rate system that prevents the imposition of progressive charges due to excessive power usage The demand is gradually increasing.     [0004] However, even where such a peak fee system is used, When power consumption increases, consumers are often unaware of this. When the actual usage exceeds the contracted usage, a certain amount of power is supplied. Power transformers installed on the pole may be damaged by overload. There was a problem that it took a lot of money to repair the price equipment.     [0005]   [Problems to be solved by the invention] The present invention has been devised to solve such a conventional problem. An electronic power meter that can measure multiple loads individually with one watt-hour meter and manage peak times. In the dynamometer, a power supply line that receives external power supply and an individual power supply A central processing unit that installs switches on the feeder lines and processes and records the data for which the amount of power has been calculated. The operation of each switch can be controlled by the mounting device.     [0006]   [Means for Solving the Problems] In order to solve the above problems, the load control device of the electronic wattmeter for multiple loads of the present invention is Current sensors 1, 1 a, 1 b, and 1 c for measuring current values of multiple loads for each load; Converts the signal values measured by the current sensors 1, 1a, 1b, 1c into digital signals Power consumption based on the digital signal processing unit 2 to be processed and the current value measured for each load It calculates and outputs data, displays and outputs necessary data through a display, and Central processing unit 3 for controlling the operation of the unit and related to the processed data and data processing A memory unit 4 for storing the processed programs and data, Data communication unit 5 for transmitting and outputting data and supplying a wide range of stabilized power to each circuit And a power supply unit 6 for supplying a backup power supply for a power failure. A multi-load electronic wattmeter, which is connected to a main power supply line 7 to which power is supplied from the outside. A main switch 72 for controlling the supply state of the external power is installed. The individual supply lines 8, 8a, 8b, 8c that supply power for each load The current sensors 1, 1a, 1b, 1c for detecting the flow value and the supply state of the individual power supply The auxiliary switches 82, 82a, 82b, 82c to be controlled are installed, and the central processing unit 3 Controls the operation of the main switch 72 and the auxiliary switches 82, 82a, 82b, 82c. And a device external to the device through a communication port provided in the data communication unit 5. To send processing instructions such as meter reading means request instructions to the central processing unit 3 It is characterized by having done.     [0007]   [Embodiment of the invention] The apparatus of the present invention configured as described above uses a single watt-hour meter to measure the power of multiple loads. Usage can be measured for each load, and the program recorded in the memory unit 4 Therefore, it is collected through the specified setting value and the measuring means that measures the power consumption. The data is compared and analyzed, and if necessary, auxiliary switching units installed for each load, or Controls the state of power supply to specific load or overall load by selectively operating main switch Not only prevents overuse of contract power, but also peak Control of power supply for im- ing. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.     [0008] FIG. 1 is a block diagram showing an overall basic configuration of the present invention. This shows the configuration of an electronic watt-hour meter that can measure the amount of power used for each load. The basic operation of such an electronic watt-hour meter will be described below.        [0009] In FIG. 1, the first power supply unit 62 uses a low voltage line regulator to control the input voltage. (A phase voltage) is rectified and smoothed to 12 V to output a stabilized DC voltage. 4 converts the 12V voltage output from the first power supply unit 62 to a 5V logic voltage The reference voltage section 66 receives a 5V voltage as an input and outputs a 2.5V reference voltage. Is supplied to the digital signal processing unit 2.      [0010] Also, the current was detected by the current sensors 1, 1a, 1b, 1c installed for each load. If the current value is input to the digital signal processing unit 2, the input voltage and the current signal Is converted from analog to digital, and the digital value is used to Will do.      [0011] Then, the operation result (for example, B-phase information, frequency information, Is transmitted to the central processing unit 3, the central processing unit 3 transmits the information. The received data is processed to calculate a power value for each load, and this is calculated by the LCD driving means. Is displayed on the LCD 32. Processing programs and data required for data processing , Are recorded in a memory unit 4 composed of a nonvolatile memory. Also, currently measuring Processing data and weighing information are sequentially recorded in a ram (RAM) in the central processing unit 3. . When the meter reading start command is transmitted (input) to the central processing unit 3 using the meter reader, the central processing unit 3 receives the command. The processing device 3 controls each processing unit to collect, calculate, and integrate data for each load. , And records the processing data at any time, as well as the LCD 32 and data communication. Meter reading is performed from the unit 5.     [0012] Through this process, one meter measures each voltage and current for multiple loads. And calculates power values such as active power and reactive power from the detected voltage and current. And integrates these power values for each usage time period to obtain the measurement results of the power amount for each load. obtain. Measured data is stored in memory as digital signals and processed Is displayed or output to the outside in accordance with the data.       [0013] As shown in the figure, an external power supply is applied to a main power supply line 7 to which power is supplied from the outside. A main switch 72 for controlling the state is provided. The main power supply line 7 is branched. Each individual supply line 8, 8a, 8b, 8c for supplying power to each load Current sensors 1, 1a, 1b, and 1c that detect the current supplied to Auxiliary switches 82, 82a, 82b, 82c for controlling the power supply state is set up. The central processing unit 3 includes the main switch 72 and the auxiliary switches 82, 82. a, 82b, 82c are configured to be freely controllable, and by controlling the opening and closing of each switch, Prevent the excess of the power of a specific load and the power consumption of the entire load.     [0014] In other words, the memory unit 4 for storing data in the present invention stores various types of programs necessary for processing data. Program is recorded, and the program is run when the central processing unit 3 processes the data. The main unit 72 and the auxiliary opening and closing are stored in the memory unit 4. When the electric load value or crackdown when the heaters 82, 82a, 82b, 82c are cut off The setting data on the allowable power of each load such as the interval is also recorded. Control of power supply for each load and overall load by comparing data with measured data I can do it. This will be described with reference to the processing follow chart shown in FIG. Is as follows.     [0015] First, measure the voltage and current values for each load and convert them to digital signals. Calculate power usage. The power consumption data for each load obtained through this Opening / closing recorded in the memory unit 4 by the central processing unit 3 and recorded in the memory unit 4 Compare with the operation set value of the container.     [0016] Then, in the data obtained for each load, the switching If there is data that exceeds the operation set value of the vessel, the central processing unit 3 tracks the data. Installed on individual supply lines 8, 8a, 8b, 8c for supplying the load for which the data was obtained. Activated auxiliary switches 82, 82a, 82b, 82c and supply power to the load Control the supply.     [0017] In this case, the switch operation set value is different from the value for the total load and the value for the individual load. Since the total load is recorded on the program at the same time as the If the power setting value is exceeded, the main switch 72 installed on the main power line 7 is operated. To control the power supply to the entire load, and pole transformers and other devices due to overload Will prevent damage.     [0018] FIG. 3 shows another embodiment of the present invention. It shows an example of using midnight electricity. This is built in the central processing unit 3 The time when the power consumption data was obtained through the time circuit After comparing with the operation time data of the switch set in the program of No.4, The preset time zone activates the switches 82a 'and 82c' of the night load. Therefore, the supply of electricity at midnight is automatically controlled. FIG. 4 shows a power supply control processing flow.     [0019] On the other hand, data communication that can input commands to the central processing unit 3 inside the watt hour meter An optical port 52 for short-distance connection or a connector for direct connection By providing communication port 56 in addition to 54, through online connection A command can be input to the central processing unit 3 and a large number of watt-hour meters can be Remote meter reading and remote control are possible.     [0020] By the way, the switch used in the present invention is usually used for all electrical equipment. The product can be used, but the type may change depending on the load capacity. Note that The number of installed current sensors and auxiliary switches depends on the number of loads It is determined.     [0021]   [Effect of the invention] As described above, the present invention is an electronic watt-hour meter that measures multiple loads. Load power control, pole transformers and other expensive It not only prevents equipment damage, but also suppresses power usage by inducing the use of appropriate loads. There is an advantage that a power saving effect can be obtained by controlling.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an apparatus configuration of an embodiment of the present invention. FIG. 2 is a processing follow chart showing an operation sequence of the apparatus of FIG. 1; FIG. 3 is a block diagram showing a device configuration of another embodiment of the present invention. FIG. 4 is a processing follow chart showing an operation sequence of the apparatus of FIG. 3; [Description of Signs] 1, 1a, 1b, 1c Current sensor 2 Digital signal processing unit 3 Central processing unit 32 LCD 4 Memory unit 5 Data communication unit 52 Optical port 54 Connector 56 Communication port 6 Power supply unit 7 Main power supply line 72 Main open / close Unit 8, 8a, 8b, 8c Individual supply line 82, 82a, 82b, 82c Auxiliary switch

Claims (1)

[Claim 1] A current sensor 1, 1a, 1b, 1c for measuring a current value of a multiple load for each load, and a signal value measured by the current sensor 1, 1a, 1b, 1c. And a digital signal processing unit 2 for converting the current into a digital signal, and calculating and outputting power consumption data from the current value measured for each load,
A central processing unit 3 for displaying and outputting necessary data through a display and controlling the operation of each unit; a memory unit 4 for recording processed data and programs and data related to data processing; An electronic wattmeter for multiple loads comprising a data communication unit 5 for transmitting and outputting data, and a power supply unit 6 for supplying a wide range of stabilized power to each of the circuits and a backup power supply for a power failure. And a main switch 7 for controlling the state of supply of external power to a main power line 7 to which power is supplied from the outside.
2, the current sensors 1, 1 a, 1 b, which branch from the main power supply line 7 and supply power to each load, and supply current to each individual supply line 8, 8 a, 8 b, 8 c.
b, 1c and auxiliary switch 8 for controlling the supply state of individual power supply
2, 82a, 82b, and 82c, and the main switch 72 and the auxiliary switches 82, 82a, 82b,
The operation of 82c is configured to be controllable, and a processing command such as a meter reading request command can be transmitted from the outside of the apparatus to the central processing unit 3 through a communication port provided in the data communication unit 5. Load control device for electronic wattmeter for multiple loads.