SU1673999A1 - Electric energy quality control system - Google Patents

Abstract

The invention relates to a measurement technique and can be used to automatically control the quality of electrical energy. The purpose of the invention is to expand the functionality by linking the monitored parameters to the timeline. The system contains sensors, a clock pulse generator, an analog-digital converter, a trigger, three switches, three counters, a results recording unit, a pulse shaper. 2 Il.

Description

The invention relates to a measuring equipment and can be used to automatically control the quality of electrical energy.

The aim of the invention is to extend the functionality by assigning monitored parameters to the timeline.

FIG. 1 and 2 depict a functional diagram of a system for controlling the quality of electrical energy.

The system for monitoring the quality of electrical energy contains n sensors 1, where n is the number of monitored parameters, a generator of 2 clock pulses, an analog-to-digital converter (ADC) 3, a trigger 4, three switches 5, 6, 7, three counters 8, 9, 10, block 11 registration results, the driver 12 pulses.

The pulse shaper consists of three elements OR NOT 13,14,15, element NOT 16 and element OR 17.

The number of switching inputs of the switches 5, 6 7 is determined by the number of monitored parameters

The width of the first counter 8 is determined by the range of monitored time norms. Thus, with a range from 30 µs to 3 s, a 20-bit binary counter can be applied.

The size of the third counter 10 is determined by the zeroing period of the current test time and the sampling resolution of the current time. With a period of 100000 s and a discreteness of 1 s, the counter can be performed on 5 elements of the binary-ten counting.

The resolution of the ADC 3 is determined by the resolution resolution of the voltage for logging. An ADC with a 10-bit binary output code can be used to record the value in 3-digit decimal numbers.

(L

WITH

about

1 with

u o o o

The execution of the result recording unit 11 is determined by the type of protocol. When recording results in the form of a protocol on paper, the result registration unit may consist of a printer with code conversion, switching and matching nodes. The operation of the results recording unit can be controlled by a signal from the output of trigger 4 or by a signal. Data readiness from the special output of the A / D converter 3.

The correspondence of the frequency of clock pulses from the output of the GTI 2 to different nodes is formed by dividers, which can be inside or outside of them (not shown),

The system of quality control of electrical energy work as follows. In the initial state, when the outputs of the sensors 1 do not have a threshold signal at the first output of the pulse driver 12, there is a voltage level that keeps the first counter 8 at input R in the zero state, and at the second output of the driver, there is a level that allows counter 9. output signals of which in binary code determine the number of the input to be connected to the output of the first 5, second 6, third 7 switches Trigger 4 has a state prohibiting the conversion of ADC 3

If at least one of the sensors 1 has a threshold signal at the output, the latter passes through the corresponding closed channel of the switch 5 to the second input of the pulse generator 12 and sets it to the state when the first counter 8 starts counting the violation duration and the counter 9 stops at position corresponding to the number of the monitored sensor. At an interval equal to the time norm for this parameter, at the corresponding output of the first counter 8 a signal about the violation of the time norm is generated. The signal about the violation of the norm of time through the corresponding closed channel of the switch 6 sets the trigger 4 to the state which allows the analog ADC conversion 3 through the first input. values at its input X in the digital code at the output. The analog input X of the A / D converter 3 is then connected via the corresponding closed channel of the switch 7 to the analog output of the sensor being monitored.

The unit 11 for registering the results provides for the conversion of information on the magnitude of voltages to the form (number) of the parameter, the current time of the test

according to. registration of information and sending out a signal about the end of registration, which, on the second input, triggers trigger 4 to its initial state.

With simultaneous presence at the exit

Several sensors threshold signal system works as follows. After the registration of the violation of one parameter is completed, the signal from the output

The result registration unit 11 establishes a trigger 4 on the second entry into the initial state, and the processing and recording of information on other parameters continues.

5 The sensor set is determined by the list.

parameters that determine the quality of electrical energy and are subject to control. As an example, the following set can be used: one or several sensors of the magnitude of the amplitude of voltage pulsations in a given frequency range sensor of the magnitude of the amplitude of a single n (false pulse; sensor of the magnitude of a single negative pulse; 5 a) voltage level; a voltage increase sensor over the upper value of the tolerance field; a voltage decrease sensor 0 or less than the lower tolerance field value. To form a threshold For example, bandpass filters (PF), high pass filters (HPF), detectors, comparators, and other elements can be used for new and analog sensor signals.

The technical solution for multi-channel measurement provides a consistent recording of violations that occurred during the time of testing. In this case, violations of various parameters that occurred simultaneously are recorded. Thus, the device allows detection of various sources causing deterioration of energy quality, increasing the reliability of information.

Claims (1)

Claims of Invention A system for monitoring the quality of electrical energy containing n sensors, where 0 n is the number of monitored parameters, a clock generator, an analog-to-digital converter and a trigger, and the trigger output is connected to the trigger input of the analog-to-digital converter, 5 l, in order to expand the functionality by attaching the monitored parameters to the time three switches, three counters, a pulse shaper, and a results recording unit, the outputs of the signals exceeding the threshold value of the sensors are connected to the information inputs of the first switch, the trigger output is connected to the first input of the pulse generator, the first output of which is connected to the reset input of the first counter, the outputs of which are connected to the information inputs of the second switch, the output of which is connected to the installation input of 1 trigger, the installation input of which is connected to the control the output of the registration unit, the output of the first switch is connected to the second input of the pulse generator, the second output of which is connected to the blocking input of the second counter, the outputs of which are connected to the control yuschimi inputs 0 the first, second and third switches, the output of the clock generator is connected to the third input of the pulse generator, the counting inputs of the first, second and third counters and the synchronization input of the result recording unit, the information inputs of the first, second and third groups of which are connected to the outputs of the analog-digital converter, the second and third counters, respectively, the outputs of the values of the monitored parameters of the sensors are connected to the information inputs of the third switch, the output of which is n with the information input of the analog-digital converter. 1 and about u. U4 x Ј M. . C X: x x Tf-m H 5 5 with h C "P1