KR0186108B1 - Electronic watt hour meter - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic integrated power meter, and in the related art, only the demand prediction value is turned on and off as a condition value connected to the output unit 1: 1. At this time, even if the estimated power amount is expected to exceed a very small value, the load that is less loaded may not be selected, and even a large load may uninterrupted the connected load.

In this case, there is also a problem that it is difficult to expect an input condition by an external sensor, a condition by an internal failure, a failure, a conditional load control by an amount of energy or a power factor, and a control by a time condition.

Therefore, the present invention performs a programmable logic control function by a user who receives input signals and conditions from inside and outside to conditionally control a load, thereby enabling control without changing the conditional and connected lines.

Description

Electronic integrated power meter

1 is a structure diagram of a conventional electronic integrated power meter.

2 is a functional diagram of a conventional electronic integrated power meter.

3 is a structural diagram of an electronic integrated power meter of the present invention.

4 is a functional diagram of an electronic integrated power meter of the present invention.

* Explanation of symbols for main parts of the drawings

10 current transformer 20 detection and multiplier

30: control and operation unit 31: CPI for operation

32: display unit 33: storage unit

34: communication control unit 35: programmable logic control unit

35a: CPI for program control 40: power supply

50: fault, fault signal detector 60: condition signal generator

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic integrated power meter, and more particularly, to an electronic integrated power meter that enables variable control by a program to monitor maximum demand power and to control load based on a power condition.

In the conventional electronic integrated power meter structure, as shown in FIG. 1, a current amount and a voltage amount transmitted through the current transformer 1 are detected, multiplied for a required demand value, an energy value, and a power factor value, and then multiplied. The detection and multiplication unit 2 for generating a pulse according to the value, and the pulse generated from the detection and multiplication unit 2 are integrated to calculate the demand value, the energy value, and the power factor value, and the load is performed in each required manner. And a control and arithmetic unit 3 for use as data for control, display and communication, and a power supply unit 4 for supplying power required for the detection and multiplication unit 2 and the control and arithmetic unit 3.

The control and calculation unit 3 calculates a demand value, an energy value, and a power factor value using pulses provided by the detection and multiplication unit 20, and generates a signal for controlling a load according to the calculated value. A cpu oil 3a, a display unit 3b for displaying a message to be informed to the outside under the control of the arithmetic oil oil 3a, and a storage unit for storing data necessary for calculation in the caffeine oil 3a. (3c), a communication control unit (3d) for communication with the outside using a modem or PC (PC), and an output control unit (3f) for controlling the necessary load under the control of the CPI (3a) .

The prior art constructed as described above will be described with reference to FIG. 1 showing a structure and FIG. 2 showing a function as follows.

When power is supplied from the power supply unit 4 to the detection and multiplication unit 2 and the control and operation unit 3, the detection and multiplication unit 2 is the amount of current and voltage induced in the current transformer 1. Detects and multiplies the current amount and the voltage amount for the maximum demand power, energy value, and power factor value, and sends a pulse corresponding to the multiplied value to the control and calculation unit 3 through an internal pulse generator (not shown).

The pulse output from the detection and multiplication unit 2 is inputted from the CPI 3a of the control and calculation unit 3 to calculate the demand value, the energy amount, and the power factor, and the calculated demand value is output through the data bus. When outputting to 3f), the output control section 3f controls the load 5 by the demand value.

Then, when the energy value calculated by the CPI 3a is output to the display unit 3b through the data bus, the display unit 3b displays the calculated energy value so as to be known from the outside.

Also, when the power factor value calculated by the CPI 3a is output to the communication control unit 3d via the data bus, the communication control unit 3d uses the power factor value as data for communication via the PC or modem. .

The storage unit 3c stores parameters and other necessary data necessary for the CPI 3a to calculate the maximum demand power, energy and power factor.

In particular, the load control predicts the amount of power demanded after 5 minutes, 10 minutes, and 15 minutes according to the demand value calculated by the CPI 3a, when the predicted amount exceeds the value set as the maximum demand value. The output control part 3f forcibly cuts off the load 5 connected one by one sequentially.

However, in the prior art as described above, since only the demand prediction value is turned on and off as a condition value connected to the output unit 1: 1, it is forced to be sequential. At this time, even if the estimated power amount is expected to exceed a very small value, the load that is less loaded may not be selected, and even a large load may uninterrupted the connected load.

In this case, there is also a problem that it is difficult to expect an input condition by an external sensor, a condition by an internal failure, a failure, a conditional load control by an amount of energy or a power factor, and a control by a time condition.

Accordingly, an object of the present invention is to provide a new electronic integrated power meter having a load control function by a program.

Another object of the present invention is to provide an electronic integrated power meter having a programmable logic control function by a user for conditionally controlling a load by receiving input signals and conditions from inside and outside.

The structure of the electronic integrated power meter of the present invention for achieving the above object, as shown in Figure 3, by detecting the amount of current and voltage delivered through the current transformer 10, the required value, energy value, power factor value And multiply the detection and multiplication unit 20 to generate a pulse according to the multiplied value and the pulse generated from the detection and multiplication unit 20 to calculate the demand value, the energy value, and the power factor value. A control and arithmetic unit 30 for removing a load by performing calculation and display and communication, receiving a value obtained above, an input signal through various sensors and switches installed externally, a timer operation related signal by a program, and the like; The power supply unit 40 for supplying the power required for the detection and multiplication unit 20 and the control and calculation unit 30, and the hard during the detection, multiplication and pulse generation process of the detection and multiplication unit 20. In order to use the pulse value or multiplication value from the fault and fault signal detection unit 50 and the detection and multiplication unit 20 which detects a verbal failure or a failure and outputs it to the control and calculation unit 30 as a condition in the program. The condition signal generator 60 transmits the value to the control and operation unit 30.

The control and operation unit 30 calculates the demand value, the energy value, and the power factor value by integrating the pulses output from the detection and multiplication unit 20 to perform display and communication control, and the CPI oil A display unit 32 for displaying a value to be notified to the outside under the control of 31, a storage unit 33 storing data necessary for operation in the CPI 31, and for remote meter reading and management To communicate with PCRoder that processes data, edits, translates and communicates programmable logic control language for modem and load control to transmit / receive data between PCs and remote sites through telephone line, power line and cable TV line. Control various loads by operating the communication control unit 34 and the various values transmitted from the operational CPI 31 and the program transmitted from the program loader. It constitutes a programmable logic controller (35).

When described in detail with respect to the operation and effect of the present invention configured as described above.

When the power is supplied from the power supply unit 40 to the detection and multiplication unit 20 and the control and operation unit 30, the detection and multiplication unit 20 generates the amount of current and voltage induced in the current transformer 10. After detecting the multiplied by the current amount and the voltage amount and transmits a pulse corresponding to the multiplied value to the control and operation unit 30 through an internal pulse generator not shown.

At this time, the fault and fault signal detection unit 50 diagnoses hardware faults from the detection and multiplication unit 20 to the process of integrating the pulses through detection, multiplication, and pulse generation, and programmable fault and fault signals accordingly. Output to the program control CPI 35a in the tissue control unit 35, and the condition signal generation unit 60 is a value for using the pulse value or multiplication value resulting from the process of pulse integration in the above detection as another condition in the program. As a result, the program signal is outputted to the program control CPU oil 35a.

The pulse transmitted from the detection and multiplication unit 20 is inputted from the control and operation CPU 30 of the operation unit 30, and the input pulse is integrated to calculate the demand, energy and power factor, and the display unit 31, The communication control unit 34 and the programmable logic control unit 35 deliver the program control CPU fluid 35a, respectively.

Accordingly, the display unit 32 displays the values calculated by the operation CPI 31, and the communication control unit 34 processes the data for remote meter reading and management data (PC) and remote data. It communicates with a program loader that edits, translates and communicates with a modem capable of transmitting and receiving through power lines and CATV lines, and a programmable logic control language for load control.

At this time, the CPI for controlling the program 35a of the programmable logic controller 35 is a demand value, an energy value, a power factor value and a fault, a fault, a fault signal, and a condition calculated from the CPI for calculation 31. A pulse value generated by the signal generator 60 and a multiplication value, etc., are set as conditional values, and the program stored in the memory 35b has an input signal input through various sensors and switches through the input controller 35d. The output signal obtained by editing and translating through the program loader is output to the output control unit 35c.

Accordingly, the output control unit 35c sends out various loads to control the loads.

In this way, the load is controlled by the sequential and logical conditional operation by the program.

As described in detail above, the present invention has an effect of raising the load control function to the next level and controlling the load conditionally according to logic by a program rather than a forced and sequential control method.

Claims (3)

(Correction) Detection and multiplication means for detecting and multiplying the amount of current and voltage delivered through the current transformer, and generating a pulse according to the multiplied value, and accumulating the pulse generated from the detection and multiplication means. Calculate the value, energy value, and power factor value to perform display and communication, and load the logic to receive the above-mentioned value, input signals through various sensors and switches installed externally, and timer operation related signals by program. A control and arithmetic means for controlling by the conditional operation according to the present invention, a fault and a fault signal detecting means for detecting hardware faults and failures during the detection, multiplication, and pulse generation process of the detection and multiplication means, and outputting them to the control and calculation unit; To use the pulse value or multiplication value from the detection and multiplication means as a condition in the program, Electronic integrated power meter, characterized in that consisting of the condition signal generating means for transmitting to the control and calculation means. (Correction) The arithmetic CPU according to claim 1, wherein the control and arithmetic means calculates the demand value, the energy value, and the power factor value by integrating the pulses output from the detection and multiplication means, and performs the display and communication control. A display means for displaying a value to be notified to the outside under the control of the CPI, a storage means for storing data necessary for the operation in the CPI, and a PC for processing remote meter reading and management data. (B) communication control means for performing communication with a program loader for editing, translating and communicating a programmable logic control language for load control and a modem for transmitting and receiving data between remote sites through a telephone line, a power line and a cable tie line; In case of operating various values transmitted from Dragon CPU and program transmitted from program loader That consisting of a programmable logic control means for controlling the various electronic load accumulated watt-hour meter according to claim. The programmable logic control means according to claim 2, wherein the programmable logic control means translates to operate the program transmitted from the program loader and executes the translated program, a storage means for storing the program, various switches connected to the outside, And an input control means for receiving a value input from a sensor, and an output control means for controlling various loads according to a program executed in the program control CPU.