SU1368788A1 - Device for determining electric load - Google Patents

Abstract

This invention relates to power consumption control devices. The purpose of the invention is to expand the functionality of the device. The device contains electricity consumption sensors 1, information receiving unit 2, control and synchronization unit 3, current load counter 4 and recorder 5. Entering the element OR 6, the frequency divider 7, the sampling pulse counter 8, the subtracting counter 9, and the formation of new functional connections to determine the average value of the load for the time from the initial to. current moments of the control period. The description provides an example of implementation of the control and synchronization unit 3. 1 hp f-ly, 3 ill. & S

Description

1

The invention relates to devices for controlling power consumption and can be used to determine the combined electrical load based on the amount of consumed energy.

The purpose of the invention is to expand the functionality by determining the average load value from the initial to the current moment within the control period.

FIG. 1 is a diagram of an apparatus for determining electrical load; FIG. 2 is a graph explaining the procedure for determining the average load value by the amount of electric power consumption in the averaging interval} in FIG. 3; the control and timing circuit diagram.

The device consists of electricity consumption sensors 1, information receiving unit 2, control and synchronization unit 3, current load counter 4, recorder 5, element OR 6, frequency divider 7, sampling pulse counter 8, subtractive counter 9, and power consumption sensors 1 are connected with

the input unit 2 receiving information, the output states of the counter 8 pulses

whose course through the element OR 6 and the frequency divider 7 is connected to the counting input of the counting 4 of the current load, the control inputs of the frequency divider 7 are connected to the outputs of the counter 8 sampling pulses, the outputs of the counter 4 of the current load are connected to the setup inputs of the recorder 5 and the subtracting counter 9, the OU- stroke of which is connected to the control input of the control and synchronization unit 3, the first output of which is connected to the counting input of the counter 8 of the sampling pulses and the control inputs of the parallel recording of the recorder 5 and subtractive counter 9, the second output is connected to the control

The reset input of counter 4 of the current load and subtractive counter 9, as well as with the installation input of the counter 8 sampling pulses, the third output - with the control input of the information receiving unit 2 and the selection input of the counter mode 4 of the current load, and the fourth output - with the second input the element OR 6 and the counting input of the subtracting counter 9,

The control and synchronization unit contains a generator of 10 time intervals 35

40

45

50

55

The discretization that determines the division factor of the frequency divider 7 occurs in the following sequence 1,2,3 ,,,,, 29,30,1,2 ,,,,. , the frequency divider provides a change in the division ratio from 1 to 30,

The initial state of the main circuit elements: in the counter 8, the sampling pulse is recorded t, therefore, the division factor of the frequency divider 7 is also set to 1; current load counter 4 and subtractive counter 9 are set to zero; The current load counter 4 is set to the sum of the signals from the third output of the control and synchronization unit 3 in the recorder 5 recorded and output to the display information on the received load for the previous half

To the input of the information receiving unit 2, information pulses are received from the electrical energy consumption sensors 1, which are converted into a series of counting pulses. The number of counting pulses in a series is determined by the weight of the information pulse of sensor 1 of the power consumption (kilowatt hours), so that in the counter

shaft, trigger 11 and element 12, the first and second outputs of the generator 10 time intervals being the first and second outputs of the control and synchronization unit, the output of the trigger 11 connected to the first input of the element 12 and the third output of the control and synchronization block, fourth the output of which is the output of the element 12, the second input of which is connected to the third output of the generator 10 time intervals, the D input of the trigger 11 is connected to the bus of the logical unit, the C input to the first output of the generator 10 time intervals, and R-wk d is a control input of a control and synchronization block.

Let us consider the work on the example of a device that determines a half-hour load every minute, averaged over the time from the beginning of the half-hour control period. In this device, the control and synchronization unit 3 generates sampling pulses with a period of 1 min at the first output; the conversion factor of the counter 8 sampling pulses is 30; laugh

0

five

0

five

0

five

The discretization specifying the division factors of the frequency divider 7 occurs in the following sequence: 1,2,3 ,,,, 29,30,1,2 ,,,. , the frequency divider 7 provides a change in the fission ratio from 1 to 30,

The initial state of the main elements of the circuit: in the counter 8 of the sampling pulses the value is recorded, therefore, the division factor of the frequency divider 7 is also set to 1; current load counter 4 and subtractive counter 9 are set to zero; The current load counter 4 is set to sum the signals from the third output of the control and synchronization unit 3 ,. The recorder 5 is recorded and displayed on the display information about the half-hour load for the previous half hour.

To the input of the information receiving unit 2, information pulses are received from the electrical energy consumption sensors 1, which are converted into a series of counting pulses. The number of counting pulses in a series is determined by the weight of the information pulse of the sensor 1 of the electric power consumption (kilowatt-hours), in order for the counter

4 current load for 1 min formed a number equal to the average for 1 min load value, it is necessary that the series contain 60 times more countable pulses,

p 60 - IlN, -,;). kWh 1 II N; ABOUT;. kW,

| where P, N., average load per 1 min, the number of information pulses that came from the i-r sensor for 1 min {

SE, 0 is the weight of the information pulse i-ro sensor, kWh;

; co ,,

606) o weighting coefficient reduced to a one-minute interval, kW I - the number of sensors. During the first minute, frequency divider 7 is set to. the division factor is 1; therefore, a series of counting pulses are passed to the counter 4 of the current load through the frequency divider 7 without changes. As a result, at the end of the first minute in the meter 4 of the current load, the value accumulates, equal to the average value of the load per 1 minute (point a in the graph of FIG. 2). At this moment (every minute) a signal is received from the first output of the control and synchronization unit 3, according to which the contents of the current load counter 4 are entered into the recorder 5 and the subtractive counter 9, and the contents of the sampling pulse counter 8 are increased by 1 (). Simultaneously with The third output of the control and synchronization unit 3, the counter 4 of the current load is transferred to the subtraction mode, and the unit 2, the reception of information stops the counting pulses. At the same time with. The fourth output of the control and synchronization unit 3 receives pulses that read the contents of the reading counter 9, and through the OR element 6 and the frequency divider 7 reduce the content of the current load counter. Since in the subtractive counter 9 is recorded the value of P,, and the division factor of the 7 frequency divider is 2, then from the counter 4 of the current load is subtracted88

if the contents of the subtracting counter 9 are equal to zero, the control and synchronization unit 3 is given a signal returning the circuit to the information receiving mode. The circuit is set to a state similar to the initial one in the operation modes of all blocks, but different from it by the contents of the counter 8 sampling pulses (), the counter

five

0

five

0

6

0

R

4 current load (g-) and registrar 5 (P,). For the time while the contents of the subtracting meter 9 are read, information receiving unit 2 receives and stores information pulses from power consumption sensors 1, and after the control signal has expired from the third output of control and synchronization unit 3, information receiving unit 2 converts them in series counting pulses, for this purpose it must contain a buffer memory register for storing information pulses received from sensors 1 of the power consumption. Since the frequency of arrival of information pulses from sensors 1 of the electric power consumption is incommensurably lower than the frequency of the matching pulses from four times the output of control and synchronization unit 3, the losses of information pulses from the sensors are excluded.

During the second minute, the number of counting pulses received by the current load meter 4 is half as many as generated in block 2, since they pass through a frequency divider with a division factor. At the end of the second minute, the recorder 5 and subtractive counter 9 records the contents of counter 4 of the current load, equal to the average load for 2 minutes (point c in the graph).

45

R.

g

P (P.- o -), CO, - ,. 60

R,

-, kW,

Where

g N; ,

about;

average load for 2 min

the number of information pulses that came from the i-ro sensor during the second minute -,

is the value -,

which corresponds to the point b on the graph (figure 2). At the moment

 30 reduced to a two-minute interval value of the weighting coefficient.

The content of the sampling pulse counter 8 is increased by 1, the division factor of the frequency divider 7 is set to C4eT-4 of the current load is transferred to the subtraction mode. The pulses from the fourth output of the control and synchronization unit 3 read the contents of the subtractive counter 9 and reduce the contents of the counter 4 of the termination load by the value of (point

d on the graph, figure 2).

During the third minute, the current load counter 4 accumulates a value that is equal to the average load value for 3 minutes by the end of the third minute,

Claims (1)

1. A device for determining the electrical load, containing sensors for power consumption, the unit with j- 3687886 information, control and synchronization unit, current load counter and recorder, the control input of which is connected to the first output of the control and synchronization unit, the second output of which is connected to the reset input of the current load counter, and the third output - to the control input of the received information block, informational inputs of which are connected to electrical energy consumption sensors, characterized in that, in order to extend the functionality by 15 determine the average value of the load for the time from the initial to the current moments within the control period, the element OR, the frequency divider, the pulse counter are entered into it 20 a sampling and subtractive counter, the first output of the control and synchronization unit being connected to the controlling input of the subtracting counter and the counting input of the pulse counter 25 samples, the second one with the installation input of the subtracting counter and the installation input of the counter of sampling pulses, the third one with the input of the counter mode selection for the current load30, the fourth one with the first input of the OR element and the counter input of the subtraction counter, and the control input with the output subtractive counter, the output unit receiving information OR the output of which is connected via a frequency divider to the counting input of the current load counter, the output-counter of the sampling pulses is connected 40 to the control input of the frequency divider, and the output of the current load counter is connected to the information inputs of the recorder and the subtractive counter. 45 2, the device according to claim 1, characterized in that the control and synchronization unit comprises a time interval generator, a trigger, an AND element, the first and the second being connected to the second input of the element 50 strokes of the time interval generator time interval generator moves are the first and second outputs of the control and synchronization unit, the output of the trigger is connected to the first input of the AND element, and is the third output of the control and synchronization unit, the fourth output of which is the output of the AND element, the second input of which is connected to the third output of the time interval generator , D 13687888 the trigger input is connected to the logic bus, and the R input is the control unit, the C input is connected to the first input of the control unit and the synchronous output of the booster interval generator. and with / 1 / D 1 g Editor O. Yurkvedka Compiled by C, Safohin Tehred M.DiDyk / 29 About t.nuH FIG. 2 T, - min Jl BUT fug. five Proofreader. Cherni