CN104237603A - Relay protection multi-outlet pressing plate pulse voltage detection device - Google Patents

Abstract

The invention provides a pulse voltage detection device for relay protection multi-channel outlet pressure plate, the device includes: a power supply module, a pulse voltage interface module, a reference voltage adjustment module, a pulse voltage amplitude comparison module, a pulse detection memory display module, and a function test module, reset module, timing module. Implementing the relay protection multi-channel outlet platen pulse voltage detection device provided by the present invention can convert the pulse voltage of all the outlet platen outlets of the multi-outlet secondary equipment into LED lights for constant light display, and has the self-test function of each test circuit , At the same time, it can measure the action time of the protection outlet. Using the relay protection multi-way outlet pressure plate pulse voltage detection device can greatly shorten the time for the outlet test of the multi-outlet secondary equipment, improve the accuracy of the test, and reduce the number of test personnel.

Description

A pulse voltage detection device for relay protection multi-channel outlet pressure plate

technical field

The invention relates to the field of electric power technology, in particular to a pulse voltage detection device for relay protection multi-channel outlet pressure plates.

Background technique

In the power system, relay protection professionals need to test the correctness of the actions of all outlets under the same logic when debugging and checking the secondary equipment of multiple outlets such as relay protection devices and safety automation devices. At present, the conventional test method is to use the DC voltage range of the multimeter to test the outlet pressure plate. This relay protection multi-outlet pressure plate pulse voltage detection instrument and method has the following disadvantages: 1. Only one outlet can be tested at a time using a multimeter. To test the correctness of each outlet, it needs to be repeated many times under each logic. The test takes a lot of time and the efficiency is low; 2. When the secondary equipment operates, the voltage pulse output by the outlet platen is maintained for a short time, and the use of a multimeter may not have time to respond to the change of the outlet voltage pulse, resulting in inaccurate testing; 3. Use a multimeter to test When testing, a tester needs to squat in front of the protective screen, constantly change the test pens according to the test requirements, and need to keep an eye on the multimeter, which is a waste of manpower.

Contents of the invention

In order to solve the above technical problems, the present invention provides a pulse voltage detection device for relay protection multi-channel outlet pressure plate, the device is equipped with multiple pulse voltage interface modules, and multiple pulse detection memory displays corresponding to the pulse voltage interface modules one by one module, each pulse voltage interface module can be connected to an outlet platen of a secondary device or a voltage pulse output port, when a certain pulse voltage interface module receives a valid pulse signal, the pulse detection memory corresponding to the pulse voltage interface module The display module will be lighted, so the relay protection multi-way outlet pressure plate pulse voltage detection device provided by the present invention can test a plurality of outlet pressure plates at the same time, shorten the time for the outlet test of the secondary equipment with multiple outlets, improve the accuracy of the test, reduce Number of testers.

The pulse voltage detection device for relay protection multi-channel outlet platen provided by the present invention includes: at least one pulse voltage interface module, and a pulse detection memory display module corresponding to the pulse voltage interface module one by one, a reference voltage adjustment module, a pulse voltage Amplitude comparison module;

The pulse voltage interface module is used to receive the pulse signal output by the outlet pressure plate, and adjust the voltage amplitude of the pulse signal to a processable range;

The reference voltage adjustment module is used to provide a reference voltage and adjust the amplitude of the reference voltage;

The input terminals of the pulse voltage amplitude comparison module are respectively connected to the pulse voltage interface module and the reference voltage adjustment module, and are used to compare the pulse signal voltage adjusted by the pulse voltage interface module with the reference voltage adjustment module Provided reference voltage comparison; when the adjusted pulse signal voltage is greater than or equal to the reference voltage, it is determined that the pulse signal is valid, and the pulse detection memory display module corresponding to the received pulse signal is driven to light up its display part; when the adjusted When the pulse signal voltage is lower than the reference voltage, it is judged that the pulse signal is invalid;

The pulse detection memory display module is connected to the output terminal of the pulse voltage amplitude comparison module, and is used to drive the display part according to the judgment result of the detection pulse voltage amplitude comparison module; if the detection pulse voltage amplitude comparison module If the pulse signal is determined to be valid, the pulse detection memory display module drives the display part to maintain the display state; if the pulse detection pulse voltage amplitude comparison module determines that the pulse signal is invalid, the pulse detection memory display module does not drive the display part.

Wherein, the device further includes: a timing module; the timing module is connected with the pulse detection memory display module, and is used to record the time from the input of the timing command to the time when the pulse appears on the outlet platen selected for timing.

Wherein, the device further includes: a reset module; the reset module is connected to the pulse detection memory display module for clearing the current memory information and displayed content of the pulse detection memory display module.

Wherein, the device further includes: a power supply module, configured to supply power to each module of the device.

Wherein, the pulse voltage interface module adjusts the voltage amplitude of the pulse signal to a processable range of 0 to 5V.

Wherein, when the pulse voltage amplitude comparison module determines that the pulse signal is valid, it outputs a high level; when the pulse voltage amplitude comparison module determines that the pulse signal is invalid, it outputs a low level.

Wherein, the display part is an LED lamp; the pulse detection memory display module receives the output of the pulse voltage amplitude comparison module, and when the pulse voltage amplitude comparison module outputs a high level, the pulse detection memory display module drives the LED light point lights up and remains on display.

Wherein, the device also includes: a function test module; the function test module is connected to the pulse voltage interface module, and is used to test the integrity of the circuit in the relay protection multi-way outlet pressure plate pulse voltage detection device, and the function test during the test The module outputs a valid pulse signal, so that the corresponding LED lights of the test loops that are intact are lit and maintained, and the corresponding LED lights of the faulty loops in the test loop are kept off.

Wherein, the adjustment range of the reference voltage adjustment module to the reference voltage is 0 to 220V.

Wherein, the reference voltage adjustment module is also used to display the current reference voltage.

The relay protection multi-channel outlet pressure plate pulse voltage detection device provided by the present invention is provided with a plurality of pulse voltage interface modules, and a plurality of pulse detection memory display modules corresponding to the pulse voltage interface modules one by one, each pulse voltage interface The module can be connected to an outlet platen of a secondary device or a voltage pulse output port. When a pulse voltage interface module receives a valid pulse signal, the pulse detection memory display module corresponding to the pulse voltage interface module will be lit. , so the relay protection multi-way outlet pressure plate pulse voltage detection device provided by the present invention can test multiple outlet pressure plates at the same time. Further, the pulse voltage detection device for the relay protection multi-way outlet pressure plate provided by the present invention has the self-test function of each test circuit, and can measure the action time of the protection outlet at the same time. Using the relay protection multi-way outlet pressure plate pulse voltage detection device can greatly shorten Multi-export secondary equipment export test time, improve test accuracy, and reduce the number of test personnel.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the use wiring schematic diagram of relay protection multi-way outlet platen pulse voltage detection device provided by the present invention;

Fig. 2 is a structural schematic diagram of a relay protection multi-way outlet pressure plate pulse voltage detection device provided by the present invention;

Fig. 3 is a schematic circuit diagram of the pulse voltage detection device for relay protection multi-channel outlet pressure plate provided by the present invention.

Detailed ways

The relay protection multi-channel outlet pressure plate pulse voltage detection device provided by the present invention is provided with a plurality of pulse voltage interface modules, and a plurality of pulse detection memory display modules corresponding to the pulse voltage interface modules one by one, each pulse voltage interface The module can be connected to an outlet platen of a secondary device or a voltage pulse output port. When a pulse voltage interface module receives a valid pulse signal, the pulse detection memory display module corresponding to the pulse voltage interface module will be lit. , so the relay protection multi-way outlet pressure plate pulse voltage detection device provided by the present invention can test multiple outlet pressure plates at the same time. Further, the pulse voltage detection device for the relay protection multi-way outlet pressure plate provided by the present invention has the self-test function of each test circuit, and can measure the action time of the protection outlet at the same time. Using the relay protection multi-way outlet pressure plate pulse voltage detection device can greatly shorten Multi-export secondary equipment export test time, improve test accuracy, and reduce the number of test personnel.

Referring to FIG. 1 , it is a schematic diagram of the connection of the pulse voltage detection device for the relay protection multi-channel outlet pressure plate provided by the present invention. LP1, LP2...LPn are n outlet pressure plates, and n is selected according to the actual number of outlet pressure plates of the secondary equipment. When in use, through n test lines, the lower ends of the n outlet pressure plates are connected to the pulse voltage detection device of the relay protection multi-way outlet pressure plate (actually, n pulse voltages of the relay protection multi-way outlet pressure plate pulse voltage detection device are connected interface module). At the same time, the grounding terminal of the relay protection multi-channel outlet pressing plate pulse voltage detection device is short-circuited with the grounding end of the outlet pressing plate power supply. In the exit test, if a pulse appears at the lower end of the pressure plate, the corresponding LED display light on the pulse voltage detection device of the relay protection multi-way exit pressure plate (pulse detection memory display module) will be lit and keep on.

Referring to FIG. 2 , it is a schematic structural diagram of a pulse voltage detection device for relay protection multi-channel outlet pressure plates provided by the present invention. A pulse voltage detection device for relay protection multi-channel outlet platen provided by the present invention includes:

At least one pulse voltage interface module 1, and a pulse detection memory display module 4 corresponding to the pulse voltage interface module one by one, a reference voltage adjustment module 2, and a pulse voltage amplitude comparison module 3;

The pulse voltage interface module 1 is used to receive the pulse signal output by the outlet platen, and adjust the voltage amplitude of the pulse signal to a processable range; more specifically, the pulse voltage interface module 1 The voltage amplitude is adjusted to handle a range of 0 to 5V.

The reference voltage adjustment module 2 is used to provide a reference voltage and adjust the amplitude of the reference voltage; more specifically, the reference voltage adjustment module can adjust the reference voltage from 0 to 220V, and the reference voltage The adjustment module can also display the current reference voltage value.

The input terminals of the pulse voltage amplitude comparison module 3 are respectively connected with the pulse voltage interface module 1 and the reference voltage adjustment module 2, and are used to compare the pulse signal voltage adjusted by the pulse voltage interface module 1 with the The reference voltage provided by the reference voltage adjustment module 2 is compared; when the adjusted pulse signal voltage is greater than or equal to the reference voltage, it is determined that the pulse signal is valid, and the output high level drives the pulse detection memory display module 4 corresponding to the received pulse signal Light up its display part; when the adjusted pulse signal voltage is less than the reference voltage, it is determined that the pulse signal is invalid, and the output is low, and the pulse detection memory display module 4 corresponding to the received pulse signal cannot be driven;

The pulse detection memory display module 4 is connected to the output end of the pulse voltage amplitude comparison module 3, and is used to drive the display part according to the determination result of the pulse voltage amplitude comparison module 3; if the detection pulse voltage amplitude If the comparison module judges that the pulse signal is valid, then the pulse detection memory display module drives the display part to maintain the display state; if the detection pulse voltage amplitude comparison module judges that the pulse signal is invalid, then the pulse detection memory display module 4 does not drive display section. More specifically, the display part can be an LED lamp; the pulse detection memory display module 4 receives the output of the pulse voltage amplitude comparison module 3, and when the pulse voltage amplitude comparison module 3 determines that the pulse signal is valid, the output is high Level, driving pulse detection memory display module 4 lights up the LED light and keeps displaying state.

Those skilled in the art can understand that the original intention of the present invention is to facilitate the staff to detect the output pulses of multiple outlet platens, so a relay protection multi-channel outlet platen pulse voltage detection device should include multiple pulse voltage interfaces The module 1 and the drive pulse detection memory display module 4 corresponding to the pulse voltage interface module 1 one-to-one. And pulse voltage amplitude comparison module 3 then should select quantity according to concrete function, if a pulse voltage amplitude comparison module 3 can compare multiple groups of input signals simultaneously, then the quantity of pulse voltage amplitude comparison module 3 can be compared with pulse voltage There are few interface modules 1; if one pulse voltage amplitude comparison module 3 can only compare one set of input signals, the number of pulse voltage amplitude comparison modules 3 should be the same as that of pulse voltage interface modules 1. There may be only one reference voltage adjustment module 2 in the device, and its output terminals are respectively connected to the input terminals of each pulse voltage amplitude comparison module 3 in the device.

Furthermore, the device for detecting the pulse voltage of the relay protection multi-channel outlet platen pulse voltage provided by the embodiment of the present invention may also include one or more of a function test module 5 , a reset module 6 , a timing module 7 and a power supply module 8 .

Functional testing module 5; functional testing module 5 is connected with described pulse voltage interface module 1, is used for testing the integrity of the circuit in the relay protection multi-channel outlet platen pulse voltage detecting device, and functional testing module outputs effective pulse during the test Signal, so that the corresponding LED light of the test circuit that is intact is lit and maintained, and the corresponding LED light of the faulty circuit in the test circuit is kept off. The reset module 6; the reset module 6 is connected with the pulse detection memory display module 4, and is used to clear the current memory information and displayed content of the pulse detection memory display module 6. Timing module 7; the timing module 7 is connected with the pulse voltage interface module 1, and is used to record the time from inputting the timing command to outputting the pulse signal from the outlet pressure plate selected for timing. The power supply module 8 is used to supply power to each module.

Referring to FIG. 3 , it is a schematic circuit diagram of the pulse voltage detection device for relay protection multi-channel outlet pressure plate provided by the present invention. Those skilled in the art can understand that the specific circuit provided in this embodiment is only a specific implementation manner, and deformation or equivalent replacement of part or all of the circuits also falls within the scope of protection required by the present invention. To simplify the description and facilitate the public's understanding, this embodiment takes the measurement circuit pressure plate of the first pressure plate LP1 as an example for illustration. In the actual relay protection multi-channel outlet platen pulse voltage detection device, some circuits surrounded by dotted lines in Fig. 3 have multiple groups in parallel, and each group processes the pulse signal of one outlet platen.

As shown in Figure 3, when there is a voltage pulse at the lower end of LP1, it is input to the pulse voltage interface module of the device through the test line 301, and after the voltage dividing resistors 302 and 304 in the pulse voltage interface module, the pulse voltage interface module will pulse The voltage converted to 0~5V enters the pulse voltage amplitude comparison module (that is, the positive input terminal of the voltage comparator 308) through the wire 303, and the negative input terminal of the voltage comparator 308 is the output voltage 307 of the reference voltage adjustment module, which can be It is adjusted through the potentiometer 306 in the reference voltage adjustment module. Before the arrival of the LP1 pulse voltage, 308 is zero, less than 307, and the output voltage 310 of the voltage comparator remains low (0). When the LP1 pulse voltage arrives, if the voltage of 308 exceeds the reference voltage 307, the output voltage of the voltage comparator From 0 to the working voltage VDD of the chip, this rising change process makes the output 313 of the flip-flop 312 in the pulse detection memory display module change from 0 to VDD, and VDD passes through the voltage dividing resistor 314 of the pulse detection memory display module to make The LED tube 315 of the display part of the pulse detection memory display module emits light, and the LED tube 315 remains in a light-emitting state, which is convenient for observation.

Further, when the reset button 309 of the reset module is pressed, the trigger 312 receives a reset command, so that the output 313 of the trigger 312 changes from high level to low level, and the LED tube goes out.

In order to test the integrity of each circuit, you can press the test button 305 in the function test module to issue a function test command. If the circuit is intact, the corresponding LED tube will light up. If there is a fault in the test circuit, the corresponding LED tube will remain off. .

The output of the trigger 312 is connected to the timing module through the timing selection switch 316. When the loop needs timing, close the corresponding switch in the corresponding selection switch 316; when the loop does not need timing, turn off the corresponding switch in the selection switch 316 . If multiple loops are selected to be timed at the same time, the timing module only records the action time of the loop with the fastest action. The open-in empty node 321 is the open-in input for the timing start command, and the open-in empty node 321 can be connected to the tester or the action contact of the protection device. When the open-in empty node 321 is closed, the pulse generator 317 of the timing module starts to continuously generate pulses of a certain frequency, and the counter 318 of the timing module performs timing according to the received pulse, and the timing result is input to the nixie tube driver chip 319 of the timing module , the nixie tube driving circuit 319 drives the LED nixie tube 320 to display the recorded time again, when there is a pulse in the pulse detection circuit selected for timing, the timing pause command is output through the selection switch 316 to suspend timing. When multiple pulse detection loops are selected for timing, the timing loop only records the time when the pulse arrives at the earliest detection loop. Before the next test needs to be timed, press the time reset button to reset the time displayed by the LED digital tube 320 to 0.

The relay protection multi-channel outlet pressure plate pulse voltage detection device provided by the present invention is provided with a plurality of pulse voltage interface modules, and a plurality of pulse detection memory display modules corresponding to the pulse voltage interface modules one by one, each pulse voltage interface The module can be connected to an outlet platen of a secondary device or a voltage pulse output port. When a pulse voltage interface module receives a valid pulse signal, the pulse detection memory display module corresponding to the pulse voltage interface module will be lit. , so the relay protection multi-way outlet pressure plate pulse voltage detection device provided by the present invention can test multiple outlet pressure plates at the same time. Further, the pulse voltage detection device for the relay protection multi-way outlet pressure plate provided by the present invention has the self-test function of each test circuit, and can measure the action time of the protection outlet at the same time. Using the relay protection multi-way outlet pressure plate pulse voltage detection device can greatly shorten Multi-export secondary equipment export test time, improve test accuracy, and reduce the number of test personnel.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deduction or replacement can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims (10)

1. A pulse voltage detection device for relay protection multi-way outlet pressure plate, characterized in that the device includes: at least one pulse voltage interface module, and a pulse detection memory display module corresponding to the pulse voltage interface module one by one, And a reference voltage adjustment module, a pulse voltage amplitude comparison module; The pulse voltage interface module is used to receive the pulse signal output by the outlet pressure plate, and adjust the voltage amplitude of the pulse signal to a processable range; The reference voltage adjustment module is used to provide a reference voltage and adjust the amplitude of the reference voltage; The input terminals of the pulse voltage amplitude comparison module are respectively connected to the pulse voltage interface module and the reference voltage adjustment module, and are used to compare the pulse signal voltage adjusted by the pulse voltage interface module with the reference voltage adjustment module Provided reference voltage comparison; when the adjusted pulse signal voltage is greater than or equal to the reference voltage, it is determined that the pulse signal is valid, and the pulse detection memory display module corresponding to the received pulse signal is driven to light up its display part; when the adjusted When the pulse signal voltage is lower than the reference voltage, it is judged that the pulse signal is invalid; The pulse detection memory display module is connected to the output terminal of the pulse voltage amplitude comparison module, and is used to drive the display part according to the judgment result of the detection pulse voltage amplitude comparison module; if the detection pulse voltage amplitude comparison module If the pulse signal is determined to be valid, the pulse detection memory display module drives the display part to maintain the display state; if the pulse detection pulse voltage amplitude comparison module determines that the pulse signal is invalid, the pulse detection memory display module does not drive the display part. 2. The relay protection multi-way outlet pressure plate pulse voltage detection device as claimed in claim 1, characterized in that, the device also includes: a timing module; the timing module is connected with the pulse voltage interface module for recording from the input Timing command to the time when the outlet platen pulse appears for the desired timing. 3. The device for detecting the pulse voltage of the relay protection multi-way outlet pressure plate according to claim 1, wherein the device further comprises: a reset module; the reset module is connected with the pulse detection memory display module for clearing the pulse voltage Detect the current memory information and displayed content of the memory display module. 4. The device for detecting pulse voltage of relay protection multi-channel outlet pressure plate according to claim 1, characterized in that the device further comprises: a power supply module for supplying power to each module of the device. 5. The device for detecting the pulse voltage of the relay protection multi-channel outlet pressure plate according to any one of claims 1 to 4, wherein the pulse voltage interface module adjusts the voltage amplitude of the pulse signal to a processable range 0 to 5V. 6. The relay protection multi-way outlet platen pulse voltage detection device as claimed in claim 5, characterized in that, when the pulse voltage amplitude comparison module judges that the pulse signal is valid, it outputs a high level; the pulse voltage amplitude When the value comparison module determines that the pulse signal is invalid, it outputs a low level. 7. The device for detecting the pulse voltage of the relay protection multi-channel outlet pressure plate according to claim 6, wherein the display part is an LED lamp; The pulse detection memory display module receives the output of the pulse voltage amplitude comparison module, and when the pulse voltage amplitude comparison module determines that the pulse signal is valid, it outputs a high level, drives the pulse detection memory display module to light the LED light, and keeps displaying state. 8. The relay protection multi-way outlet pressure plate pulse voltage detection device as claimed in claim 7, characterized in that, the device also includes: a function test module; the function test module is connected with the pulse voltage interface module for testing The integrity of the circuit in the relay protection multi-way outlet pressure plate pulse voltage detection device, the functional test module outputs an effective pulse signal during the test, so that the corresponding LED lights of the test loops that are intact are lit and maintained, and the faulty ones in the test loop are The LED lights corresponding to the loop remain off. 9 . The device for detecting pulse voltage of relay protection multi-channel outlet pressure plate according to claim 8 , wherein the adjustment range of the reference voltage by the reference voltage adjustment module is 0 to 220V. 10 . The device for detecting pulse voltage of relay protection multi-channel outlet pressure plate according to claim 8 , wherein the reference voltage adjustment module is also used to display the current reference voltage. 11 .