KR0128141Y1 - Power supply complex apparatus with data reset function - Google Patents

Abstract

The present invention relates to a power supply and demand multi-function meter with a data reset function. When the power supply and demand multifunction device is in operation, it is restored after prolonged power failure (in this case, the internal battery is also out of power) or when the CPU is congested and performs abnormal operation. In the current display, the cumulative strategic power, cumulative power and cumulative reactive power of the power factor measurement time, maximum demand power, demand power, demand time and current time data are all destroyed, reset, and operated again. In the screen display, the accumulated value of the previous day or the previous month is destroyed and the value of the last accumulated value of the previous month after the reset is stored and displayed so that the user inputs and sets only the contents to be replaced with the current time.

Description

Multi-function power meter with data reset

1 is a block diagram showing the overall configuration of the present invention.

2 is a front view of the appearance showing the display unit of the present invention, (a) shows a state of displaying the current screen, (b) shows a state of displaying the screen of the meter reading.

3 is a flowchart showing the operation of the present invention.

* Explanation of symbols for main parts of the drawings

2: central control processor 3: clock generator

6 hardware control processor 7 clock generator

8: switch control panel

The present invention relates to a power supply and demand multi-function instrument having a data reset function, and particularly has a data reset function for reducing the internal data to the original state when the CPU congestion or power supply is interrupted for a long time. The present invention relates to a power supply and demand composite instrument.

In this case, the power supply and demand multi-function instrument is used in combination with current transformer and transformer for measurement. It can be installed in business or industrial consumer to measure the precision power, power power for power factor measurement, reactive power for power factor measurement, and maximum demand power. The meter was asked to give details of the power supply.

And the power supply multi-function meter has the functions of precision power meter, power factor measurement precision power meter, power factor measurement reactive power meter and time switch, so that one or more CPUs can control the internal components of each other. In addition, the values displayed on the front panel display as well as the previously displayed values to be stored and stored in accordance with the capacity of the memory.

However, when the power supply is interrupted due to natural disasters or accidents while the power supply is being used, the power supply of the internal battery is interrupted and the power supply is restored or the CPU is congested. The abnormal operation occurred and the display data of the display unit as well as the stored data of the memory had an abnormal value converted in a state that was not normal, so they had to be reset individually.

In addition, there is a disadvantage in that the process of reactivation after the reset is performed for each display unit or function. Accordingly, an object of the present invention is to provide a power supply and demand composite instrument having a data reset function for restoring after a prolonged power failure or when the CPC congestion returns internal data to an initial state.

To this end, the present invention is restored after a prolonged power failure (in this case, the internal battery is also outage) during the operation of the power supply / demand system, or when the CPU is congested and performs abnormal operation, the present day the display displays the cumulative amount of power; Accumulated power, cumulative reactive power, maximum demand power, demand power, demand time and current time data of power factor measurement time are all erased and reset and operated again.On the day before or after reset, By deleting all the previous month's cumulative values and resetting them, the value of the last cumulative value of the previous month is stored and displayed.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

By using the current value and voltage value detected through the current transformer (CT) and the potential transformer (PT) not shown in the drawing, the effective pulse (WP) due to the voltage proportional to the instantaneous power, the short circuit of the wire, The effective pulse WP, the phase value PE, and a power measurement unit (not shown) calculate a reactive pulse QP based on a phase value PE according to the ground fault and a voltage value proportional to the instantaneous reactive power. An input compensator 1 for receiving an invalid pulse QP and compensating for weakening or noise-converting during signal transmission, and a normal valid pulse WP and a phase value PE via the input compensator 1. And a center for receiving a time setting clock from the clock generator 3 while receiving an invalid pulse QP, and outputting a power amount pulse signal, an effective pulse compensation signal, and an invalid pulse compensation signal including an effective power amount, an invalid strategy amount, and an inhibitory cost. Control Processing Unit (2) ,

A time invalid pulse compensation unit 4 for receiving an invalid pulse compensation value from the central control unit 2 and outputting an invalid pulse compensation signal to a power measurement unit;

A time effective pulse compensation unit 5 for receiving an effective pulse compensation value from the central control unit 2 and outputting an effective pulse compensation signal to a power measurement unit;

Hardware for outputting various display signals by receiving clock signal for setting time from clock generator 7 and control signal according to user's processing operation from switch control section 8 while receiving power pulse signal from central control processor 2 The control processor 6,

The corresponding LEDs (Kwh), (Kvarh), and (non-metering) of the first display unit 10 are inputted from the hardware control processor 6, respectively, while receiving the electric power meter operation display signal, the reactive power meter operation display signal, the no-measurement display signal, and the power failure display signal. And a first display driver 9 for selectively blinking (power failure) to indicate an operating state of a wattmeter, an operating state of a reactive power gauge, an unmetered (or reverse current) state, or a power failure state;

The display signal for the cumulative power amount up to now is received from the hardware control processor 6 and accumulated through the second display unit 12 as a six-digit number (for example, six digits including two decimal places, such as 7027.31). The second display driver 11 for notifying the amount of power the day before,

A third display driver for receiving the power factor indication signal for power factor measurement from the hardware control processor 6 and notifying the cumulative amount of power in the power factor measurement time period by the number of six digits (for example, 0255.81) through the third display unit 14 ( 13) and,

The fourth display driver 15 which receives the reactive power amount display signal for power factor measurement from the hardware control processor 6 and informs the cumulative reactive power amount of the power factor measurement time period by a six-digit number (for example, 0028.14) through the fourth display unit 16. )Wow,

A fifth table driver 17 which receives the screen display signal from the hardware control processor 6 and indicates whether or not to read the meter while expressing no display or meter reading through the fifth display unit 18;

A sixth display driver 19 which receives the maximum demand power indication signal from the hardware control processor 6 and informs the maximum demand power up to the present after the last reading through the sixth display unit 20 by four digits;

The seventh display driver 21 which receives the cumulative maximum demand power indication signal from the hardware control processor 6 and informs the cumulative maximum demand power of the current demand time period or the meter reading date in four digits through the seventh display unit 22. )Wow,

An eighth display driver which receives a time display signal or a power factor display signal from the hardware control processor 6 and informs the eighth display unit 24 of the power factor of 100 minutes or the elapsed time of the current demand time in 15-minute units by two digits ( 23) and,

A ninth display that receives the time display signal from the hardware control processing unit 6 and informs the ninth display unit 26 of the current hour / minute (12:13) or the month / day (10.24) of the meter reading. The drive unit 25 is made up of.

The power supply / demand complex filter having the data reset function of the present invention configured as described above loses the effective pulse (WP), the phase value (PE), and the invalid pulse (QP) input from the power measurement unit through the input compensator (1). The central control processing unit 2, which compensates for the variable caused by noise and noise, performs an operation on them and outputs an electric power pulse signal indicating an electric power supply state such as an effective electric power amount, an reactive electric power amount, and a suppression rate.

In addition, the hardware control processing unit 6 receiving the above-mentioned electric power pulse signal divides the clock from the clock generator 7 and calculates the time while calculating the time, and setting / memory switch of the switch operating unit 8, the number conversion switch, and the maximum demand power return. It operates in response to the user's processing operation input through the switches, and displays the measured values by dividing the display screen into the current display screen.

That is, the first through the ninth display driver (9), (11), (13), (15), (17), (19), (21), (23), (25) through the first to the second 9 The operation state of the power amount gauge is invalid in the present display state in the display portions 10, 12, 14, 16, 18, 20, 22, 24, and 26. Operational status, no-measurement state and power outage state of the electric power store, cumulative total power amount up to now, cumulative power amount of power factor measurement time, cumulative reactive power amount of power factor measurement time, no display, maximum demand power, demand power In addition, the elapsed minutes of the demand time and the current hour and minute are displayed, while in the display state of the meter reading, the operation and state, the accumulated full-day strategy amount of the meter reading date, the cumulative power amount of the counting time period, the cumulative expression power of the counting time period, the meter reading, the maximum Power demand, power demand, power factor and month and day of meter reading are displayed.

During the operation as described above, the power supply is cut off for a long time (at least 240 hours), and the power is restored while the charging power of the internal battery is all blacked out and the operation is not performed (step 30), or the central control unit 2 When data processing of the hardware control processing unit 6 is congested and abnormal operation is performed (step 31), the cumulative precision power amount up to the present of the second display unit 12, which is the current display value, and the current position of the third display unit 14 The cumulative power amount of the power factor measuring time zone of the power factor measuring time, the cumulative reactive power amount of the power factor measuring time period to the present time of the fourth display unit 16, the maximum demand power amount of the current month of the sixth display unit 20, and the current of 15 minutes of the seventh display unit 22. The power consumption of the demand time, the elapsed time of the demand time in units of 15 minutes of the eighth display unit 24, and the current time of the ninth display unit 26 are all destroyed (step 32), and the internal data is also destroyed and the initial state. To (33).

Then, the power factor measurement starts from the moment of reset, the meter is measured from the power factor measurement time frame (08:00 to 22:00) and the current time is displayed from 00:00 (step 34).

If one of the year, month, and day of the current time is set (step 35), the meter returns to this time to continue the weighing, but the current time is counted from the set time (step 36). 08:00 to 22:00) is changed to another time (step 37), it is displayed starting the power factor measurement from the beginning of the time zone (step 38).

On the other hand, the second to fourth displays (12), (14) and (16) and the sixth to ninth display units (20), (22), (24) and () when the screen display and internal data of the meter are reset. 26) the display value is deleted (step 39), the internal stored data is destroyed (step 40), and the last cumulative value of the previous month is stored and displayed from the moment of resetting, or the date and month of the last weighing fixed are stored and displayed. After that (step 41), the process returns to the process of recognizing the user's reading date setting or the accumulated value after the operation (step 42).

Therefore, the power supply multi-function meter with the data reset function of the present invention interrupts the supply of commercial power from the outside for a long time and also restores the power charged in the internal battery, or restores the power to the central control functioning as a CPU. When the processing unit 2 or the hardware control processing unit 6 is congested, the display state of the screen and the internal storage data are all reset to 0, and then the weighing is started again from 0 or the internal operation is performed according to the state after setting. This prevents the measurement data from being changed to completely different values and causing an error in measurement.

Claims (1)

In the power supply and demand composite instrument having a data reset function, the central control processing unit receiving the effective pulse, the phase value and the invalid pulse through the input compensation unit 1 and receives the information according to the interruption and supply of the power (2) ) Outputs a power pulse signal, an effective pulse compensation signal, an invalid pulse compensation signal, and a control signal to the hardware control processor 6, and outputs a power pulse signal and a control of the effective power amount and the reactive power amount from the central control processor 16. The hardware control processor 6 receiving the signal is configured to transfer the information according to the congestion of the internal data to the central control processor 2 so as to perform data reset. Multi-function instrument.