KR0149184B1 - Precision complex device with data reset functioning - Google Patents

Abstract

The present invention relates to a power supply and precision precision multimeter with a data reset function, which is restored after a long power failure (in this case, the internal battery is also outage) while the power supply and demand precision compound meter is operating, or the CPU is congested and abnormal operation is performed. If it is executed, the accumulated power of the midnight time, the accumulated power of the daytime, the accumulated power of the evening time, the power of power factor measurement, the reactive power applied by the power factor measurement, the demand demand of the daytime, the maximum demand of the daytime While destroying the internal data while eliminating the maximum demand power in the evening time, the demand power in the evening time, the demand time and the current time to 0, the metering is performed according to each time zone from 0, Accumulate values and power factor by storing and displaying the last cumulative place last month This eliminates the obstacles to measurement.

Description

Power multi-function precision meter with data reset function

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

2 is a front view of an appearance showing a display unit of the present invention, in which (a) shows a state of displaying a current screen, and (b) shows a state of displaying a screen of a 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 multi-function device having a data reset function, in particular, when the congestion of the CPU or the interruption of the power supply for a long time to initialize the internal data and display value to prevent the chaos caused by the converted value The present invention relates to a power supply precision composite instrument with a data reset function that is prevented.

Here, the power supply precision multi-function instrument is used in combination with the transformer current transformer and transformer, and it is installed in the business or industrial consumer to measure the precision power, the precision power factor for measuring power factor, the reactive power factor for power factor measurement, and the maximum demand power. In other words, the details of the power supply.

The power supply precision 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, and at least one CPU controls the internal organic operation to be accurate and displays the front panel. In addition to the values displayed on the screen, the previously displayed values are stored and stored according to the capacity of the memory.

However, when the power supply of the internal battery is interrupted and the power supply is restored or the CPU is congested while the power supply precision power meter is not supplied for a certain period of time (about 240 hours) due to natural disaster or accident during power supply. Since the abnormal operation occurs, the display data of the memory as well as the display values of the display parts have different values converted from non-normal states, and thus, the values of the normal states must be reset as well.

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 precision multi-function instrument having a data reset function for restoring after a long power outage or when the CPU is congested to reduce the internal data and display values 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 operation, or when the CPU is congested and performs abnormal operation, the cumulative amount of power in the late night time of the display value of the current screen, daytime Accumulated power in time zone, cumulative power in evening time, power factor measurement power, reactive power for power factor measurement, demand power in day time, peak demand power in day time, peak power in evening time, demand power in evening time, demand time and present While the time is set to 0, the internal data is destroyed and then weighed from 0 to the respective time zone, while the reading values on the meter screen and the internal data are all destroyed, and the last accumulated value of the previous month is stored and displayed. The measurement of the power factor eliminates the obstacles to measurement.

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

By using current value and voltage value detected through current transformer (CT) and potential transformer (PT) not shown in the figure, effective pulse (WP) due to voltage proportional to instantaneous power, short circuit or The effective pulse WP and the phase value PE from the power measuring unit (not shown) which calculates the invalid pulse QP based on the phase value PE according to the ground fault and the voltage value proportional to the instantaneous reactive power. An input compensator (1) for receiving an invalid pulse (QP) and compensating for a reduced value and a change in noise during signal transmission;

Inputting the time setting clock from the clock generator 3 while receiving the normal valid pulse WP, the phase value PE and the invalid pulse QP via the input compensator 1, the effective power amount, the reactive power amount and A central control processor (2) for calculating a power factor pulse signal, an effective pulse compensation signal and an invalid pulse compensation signal by calculating a value for the power factor;

A time invalid pulse compensation unit 4 for receiving an invalid pulse compensation signal from the central control unit 2 and outputting a modulation signal to an invalid voltage detection circuit of the power measurement unit;

A time effective pulse compensation unit 5 for receiving an effective pulse compensation signal from the central control unit 2 and outputting a modulation signal to an effective voltage detection circuit of the power measurement unit;

Receiving the clock for setting the time from the clock generator 7 while receiving the power amount pulse signal from the central control processor 2, while performing the time clock of the present time and time zone, the setting / memory switch and the numerical conversion of the switch operation unit 8 A hardware control processing unit 6 which receives a control signal according to a user's processing operation through a switch and a maximum demand power return switch, and outputs various display signals;

While receiving the power meter operation display signal, the reactive power meter operation display signal, the no-measurement display signal and the power failure display signal, respectively, from the hardware control processor 6, the corresponding LED of the first display unit 10 blinks selectively, and the operation state of the power meter (Kwh). ), The first display driver 9 running between a reactive state meter (Kvarh), a non-measured (or reverse current flow) state (non-measured) or a power failure state (electrostatic),

The hardware control processor 6 receives a display signal of the accumulated power amount up to the present (measurement date) of the late night time zone of 22: 00-08: 00, and calculates the accumulated power amount of the late night time zone up to the present through the second display unit 12. A second display driver 11 for notifying a number of six digits (for example, six digits including two decimal places, such as 1027.32 Kwh),

The display signal is input from the hardware control processor 6 to the current (reading date) of the daytime period of 08:00 to 18:00, and the cumulative amount of power up to the present daytime is displayed through the third display unit 14. A third display driver 13 notified by six digits (e.g., 3028.84 Kwh),

The hardware control processor 6 receives a display signal of the accumulated power amount up to the present (measurement date) of the evening time of 18:00 to 22:00 and receives the accumulated power amount of the evening time up to the present through the fourth display unit 16. A fourth display driver 15 notified by six digits (e.g., 3134.26 Kwh),

The fifth display driver which receives the power factor measurement signal for power factor measurement from the hardware control processor 6 and informs the cumulative power amount of the power factor measurement time to the present by 6 digits (for example, 0255.81 Kwh) through the fifth display unit 18. With 17,

A sixth number that indicates the cumulative reactive power amount for the power factor measurement time period by receiving the input power factor measuring signal for power factor measurement from the hardware control processor 6 and displaying a six-digit number (for example, 0028.14 Kvarh) through the sixth display part 20. The display driving unit 19,

A seventh display driver 21 which receives the screen display signal to the hardware control processor 6 and indicates whether or not to read the meter while expressing no display or meter reading through the seventh display unit 22;

The hardware control processor 6 receives the demand power indication signal for the current demand time of the day time zone from 08:00 to 18:00 through the eighth display drive unit 14 to the present daytime An eighth display driver 13 which notifies the demand power for the current demand time period or the cumulative maximum demand power of the meter reading date by four digits;

The maximum demand power of the daytime period from the hardware control processing unit 6 to 08:00 to 18:00 during the weekly time period is input through the ninth display unit 16, and the maximum demand power of the daytime period until the present time is 4 digits. A ninth display driver 15 informed by a number;

The maximum demand power of the evening time from 08:00 to 22:00 is input from the hardware control processor 6, and the maximum demand power of the evening time until the present time after the last reading through the tenth display unit 18 is 4 digits. A tenth display driver 17 informed by a number;

Receives the demand power display signal for the current demand time of the evening time of 08:00 ~ 22:00 from the hardware control processing unit 6 through the eleventh display unit 20, the current demand of the evening time until the present time An eleventh display driver 19 informing a 4-digit number of cumulative maximum demand power of the demand power or the meter reading day for the time zone;

A twelfth display driver which receives a time display signal or a power factor display signal from the hardware control processor 6 and informs the elapsed minutes of the current demand time in units of 15 minutes or the power factor of 100 fractions in two digits through the twelfth display unit 22; With 21,

The thirteenth display which receives the time display signal from the hardware control processor 6 and informs the thirteenth display unit 24 of the current hour / minute (12:29) or the month / day (10.24) to be read. The drive unit 23 is configured.

The power supply-demand precision composite meter having the data reset function of the present invention configured as described above receives the effective pulse (WP), the phase value (PE), and the invalid pulse (QP) input from the power measurement unit via the input compensator (1). During the operation, the central control processing unit 2, which compensates for the variables caused by loss or noise, performs calculations on them, and outputs an electric power pulse signal indicating an electric power supply state such as effective electric power amount, reactive electric power amount and power factor.

In addition, the hardware control processing unit 6 which receives 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 control unit 8, the number conversion switch, and the maximum demand power. It operates in response to the user's processing operation input through the return switches, and displays the measured values by time zone (night time, day time, and evening time) by distinguishing the display state of the current screen from the display state of the meter reading screen.

That is, the first to the thirteenth display driver 9, 11, 13, 15, 17, 19, 21, 23, 25, and 27. 29 through (31) and (33) through the first to thirteenth display sections (10), (12), (14), (16), (18), (20), (22), (24), (26), (28), (30), (32) and (34), in the case of the current screen, the operation state of the electricity meter, the operation state of the reactive electricity meter, the non-metering state and the power failure state, Cumulative power of daytime, cumulative power of evening time and power factor measurement, cumulative reactive power of power factor measurement, no indication, demand power of daytime time, maximum demand power of daytime time, evening time The maximum demand power displays the amount of power demanded in the evening, the elapsed time and the current time of the demanded time, and in the case of the meter reading screen, the operation and status, the accumulated power of the late night time zone of the meter reading day, the cumulative power of the day time zone, and the evening time zone. Cumulative power amount, cumulative power amount for power factor measurement, It displays the cumulative reactive power for measuring the rate, the cumulative maximum demand power in the day time, the maximum demand power in the day time, the maximum demand power in the evening time, the cumulative maximum power demand in the evening time, power factor and meter reading month and day. do.

During the operation as described above, the power is not supplied for a long time (at least 240 hours) and the charging power of the internal battery is also completely out of power and the power is restored (step 40), or the central control unit 2 or If the data processing of the hardware control processing unit 6 is congested and abnormal operation is performed (step 41), in the case of the display state of the current screen (step 42), the cumulative amount of power in the late night time zone to the present time of the second display unit 12, The cumulative amount of power in the daytime period until the present time of the third display part 14, the cumulative amount of power in the evening time until the present time of the fourth display part 16, the cumulative power amount for power factor measurement to the present time of the fifth display part 18, and the sixth display part 20 Cumulative reactive power for power factor measurement to date, weekly demand power amount of current demand time of the eighth display part 24, weekly maximum demand power amount of current demand time of the ninth display part 26, and suspension demand of the tenth display part 28. Evening demand of hours , While the evening demand power amount of the hanging demand time of the eleventh display unit 30, the elapsed time of the hanging demand time in units of 15 minutes of the twelfth display unit 32, and the present time of the thirteenth display unit 34 are all disappeared (step 43). ), Destroying its corresponding data (step 44), and resetting each time zone (22: 00-08: 00), (08: 00-18: 00), (18: 00-22: 00), (08: 00-18: 00), (08: 00-18: 00), (every 0 minutes, 15 minutes, 30 minutes, every 45 minutes from 08: 00-18: 00), (08:00 00 minutes, 15 minutes, 30 minutes, every 45 minutes of ~ 18: 00), (00 minutes, 15 minutes, every 30 minutes, every 45 minutes of 18: 00-22: 00), (18: 00-22: 00 (00 minutes, 15 minutes, 30 minutes, every 45 minutes) and the timekeeping (step 45).

If the user sets the time zone or the current time here (step 46), the metering or timekeeping starts from that time zone (step 47).

On the other hand, if the meter reading screen is displayed in step 42, all the accumulated value or maximum value since the previous metering date, power factor and metering month and day are all disappeared to 0 (step 48), and the corresponding data are also destroyed (step 49). The accumulated value of meter reading days is memorized and displayed at a reset instant (step 50). Weighing is then started for the cumulative and maximum values (step 51).

Therefore, when the power supply is interrupted for a long time and restored or restored by the power supply precision composite meter having the data reset function of the present invention, or when the central control processing unit 2 or the hardware control processing unit 6 having the function of the CPU is congested, If the display value of the current screen or its data, and the display value or the data of the meter screen are all destroyed, then weighing starts again or resets, so that the internal stored data or stored value is converted to another value, and the measurement is interrupted. This is to prevent the phenomenon.

Claims (1)

In the power supply precision multi-function instrument with data reset function, the step of restoring after a long power failure or recognizing the congestion of data, and the cumulative power amount, demand power, and maximum demand for each time zone when the current screen is displayed The step of erasing the display value and data of power, demand time, and present time, the step of weighing and clocking from 0 for each time zone, and the step of metering and clocking in the time zone when the time zone is changed In the display state of the screen, data reset is performed by erasing the accumulated power amount and maximum value and display value after the previous meter reading, and storing and storing the accumulated value of the previous month and then accumulating it again. Power supply precision multi-function instrument with reset function.