CN112198426A - Circuit breaker divide-shut brake coil repetitive pulse method detection device - Google Patents
Circuit breaker divide-shut brake coil repetitive pulse method detection device Download PDFInfo
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- CN112198426A CN112198426A CN202011172135.8A CN202011172135A CN112198426A CN 112198426 A CN112198426 A CN 112198426A CN 202011172135 A CN202011172135 A CN 202011172135A CN 112198426 A CN112198426 A CN 112198426A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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Abstract
The invention relates to a circuit breaker opening and closing coil repetitive pulse method detection device, and belongs to the technical field of electric fault detection devices. The detection unit is connected with the analysis unit through a USB communication interface, the detection unit comprises a first repetitive pulse generator, a second repetitive pulse generator, a 220V alternating current power supply and a high-speed oscilloscope, the first repetitive pulse generator is connected with one end of a breaker opening and closing coil, the second repetitive pulse generator is connected with the other end of the breaker opening and closing coil, the 220V alternating current power supply is connected with two ends of the breaker opening and closing coil respectively, the first channel of the high-speed oscilloscope is connected with one end of the breaker opening and closing coil through a first signal conditioning module, and the second channel of the high-speed oscilloscope is connected with the other end of the breaker opening and closing coil through a second signal conditioning module. The detection device can improve the fault detection efficiency and the detection sensitivity of the opening and closing coil of the circuit breaker.
Description
Technical Field
The invention belongs to the technical field of electric fault detection devices, and particularly relates to a circuit breaker opening and closing coil repetitive pulse method detection device.
Background
Due to the reasons of poor processing technology, winding technology defects, disordered turn-to-turn arrangement and the like, the turn-to-turn insulation of the circuit breaker opening and closing coil is reduced, and even turn-to-turn short circuit occurs, namely, the turn-to-turn short circuit fault of the coil. The turn-to-turn short circuit fault causes that the magnetic force generated by the coil is reduced after the action command of the circuit breaker is sent out, the current is increased when the coil is attracted, the switching-on and switching-off operations cannot be normally completed in serious cases, and even the coil is heated until being burnt out due to long-time electrification, so that the serious fault that the circuit breaker refuses to move is caused. According to statistics, similar fault cases are introduced in a system and many similar fault cases appear in state breaker factories, so that serious threats are caused to the safe operation of a power grid and equipment, and more accurate and more convenient technical means are urgently needed to be adopted for detection, diagnosis and prevention.
Patent document No. CN106124946A discloses a control coil turn-to-turn insulation fault detection device for a high-voltage circuit breaker, which includes a high-frequency high-voltage signal output device, a control detection output device and a connecting wire; the control detection output device is used for controlling the input of a detection signal and the detection output of a measurement result; the control end of the control detection output device is connected with the controlled end of the high-frequency high-voltage signal output device, one end of the connecting wire is connected with the output end of the high-frequency high-voltage signal output device, and the other end of the connecting wire is connected with the two ends of the measured electromagnet coil. The invention can detect the turn-to-turn insulation state of the detected electromagnet coil in advance, avoid control failure accidents caused by the turn-to-turn insulation fault of the transformer substation high-voltage circuit breaker control coil, and ensure the safe operation of the high-voltage circuit breaker.
Patent document No. CN108051698A discloses a method, an apparatus and a system for detecting turn-to-turn insulation fault of a coil, wherein the method comprises: acquiring characteristic information of a measured reactance type coil, and drawing a characteristic curve of the measured reactance type coil according to the characteristic information of the measured reactance type coil; calculating the error between the characteristic curve of the measured reactance type coil and the standard characteristic waveform by an area method according to the characteristic curve of the measured reactance type coil and the standard characteristic waveform; and if the error exceeds a first threshold value, judging that the measured reactance type coil has turn-to-turn insulation fault. The coil turn-to-turn insulation fault detection method, the device and the system provided by the invention realize the detection of the reactance type coil turn-to-turn short circuit defect in the control loop of the high-voltage circuit breaker, can detect the reactance type coil turn-to-turn insulation state and realize the safe operation of the high-voltage circuit breaker.
The patent document with publication number CN108896880A discloses a device and a method for simulating turn-to-turn insulation fault of a switching-on and switching-off coil of a circuit breaker, wherein the device part comprises a shell, a waveform generation module, a waveform acquisition and analysis module, a waveform storage module, a display module, a coil fault simulation module, a miniature transformer, a power interface and a control key; the coil fault simulation module comprises a socket, a lead, a fault simulation circuit arranged in the shell and a first socket arranged on the shell, and a second socket is arranged on the socket; the fault simulation circuit comprises a circuit board and a plurality of groups of capacitors and resistors integrated on the circuit board. According to the invention, turn-to-turn insulation faults of the opening and closing coils of the circuit breaker can be simulated one by one through the coil fault simulation module.
Disclosure of Invention
In view of the above, the technical problem to be solved by the present invention is to provide a circuit breaker opening and closing coil repetitive pulse method detection apparatus, so as to improve the fault detection efficiency and detection sensitivity of the circuit breaker opening and closing coil.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the utility model provides a circuit breaker divide-shut brake coil repetitive pulse method detection device, includes detecting element and analysis unit, detecting element passes through USB communication interface and analysis unit connection, detecting element includes repetitive pulse generator one, repetitive pulse generator two, 220V alternating current power supply and high-speed oscilloscope, repetitive pulse generator one is connected with the one end of circuit breaker divide-shut brake coil, repetitive pulse generator two is connected with the other end of circuit breaker divide-shut brake coil, 220V alternating current power supply is connected with the both ends of circuit breaker divide-shut brake coil respectively, high-speed oscilloscope's passageway one is connected with the one end of circuit breaker divide-shut brake coil through signal conditioning module one, high-speed oscilloscope's passageway two is connected with the other end of circuit breaker divide-shut brake coil through signal conditioning module two.
Preferably, the first repetitive pulse generator and the second repetitive pulse generator output identical repetitive pulses.
Preferably, the 220V alternating-current power supply outputs current, voltage and conduction time which are the same as the operation condition of the opening and closing coil of the circuit breaker.
Preferably, the first signal conditioning module and the second signal conditioning module are both isolation, filtering and amplification modules.
Preferably, the detection unit is connected with the opening and closing coil of the circuit breaker through a GND interface.
Preferably, the analysis unit comprises a power-on self-test module, a sampling initialization module, a pulse generation circuit initialization module, a pulse injection characteristic waveform display module, a fault severity factor calculation and judgment module, a data storage module and an analysis report generation module which are electrically connected in sequence.
A method for detecting by using a circuit breaker opening and closing coil repetitive pulse method detection device comprises the following steps:
s1: the detection unit is electrically connected with the circuit breaker opening and closing coil and the analysis unit respectively, the analysis unit is started, each functional module of the detection unit is subjected to power-on self-test, if the detection is normal, the step S2 is carried out, and if the detection is abnormal, the detection is finished;
s2: the method comprises the steps that power-on self-test is normal, an analysis unit starts to test, and a default acquisition parameter is used for initializing an acquisition system, wherein the acquisition system comprises a high-speed oscilloscope, a first channel of the high-speed oscilloscope is connected with one end of a circuit breaker opening and closing coil through a first signal conditioning module, and a second channel of the high-speed oscilloscope is connected with the other end of the circuit breaker opening and closing coil through a second signal conditioning module;
s3: initializing a pulse generating circuit, wherein the pulse generating circuit consists of a first repetitive pulse generator and a second repetitive pulse generator, the first repetitive pulse generator is connected with one end of a breaker opening and closing coil, and the second repetitive pulse generator is connected with the other end of the breaker opening and closing coil;
s4: after the initialization is finished, the acquisition system enters into trigger waiting, the first repetitive pulse generator and the second repetitive pulse generator are injected with pulses, the system is triggered, and the step S5 is executed;
s5: acquiring and displaying pulse signals, and storing the pulse signals to a magnetic disk; if the system trigger is abandoned, the process returns to step S4;
s6: performing fault judgment, reading file data by an analysis unit, judging the fault degree, and finishing detection; if the failure determination is abandoned, the process returns to step S4.
The circuit breaker is known in the art to have short circuit and overload protection functions, the short circuit protection function of the circuit breaker is realized by an electromagnetic coil, and the circuit breaker is widely applied to power systems. The breaker opening and closing coil is low in market price, and when the breaker opening and closing coil fails, a method which is generally adopted is that a new electromagnetic coil is replaced when power failure occurs, and the electromagnetic coil is recovered to be normal. Although the method for solving the problems is feasible, the method has obvious problems: firstly, the method belongs to a post-remedial type, the occurrence of problems cannot be predicted in advance, and huge economic losses can be brought to a power system and national economy; and secondly, when the fault occurs, whether the fault is a coil fault needs to be detected and confirmed, the overhauling time and the power failure time are prolonged invisibly in the process, the overhauling efficiency is lower, and the economic loss caused by power failure is larger. In view of the above objective problems, measures have been taken to detect the opening and closing coils of the circuit breaker in the power system, and currently, methods such as manual inspection and testing of the operating characteristics of the circuit breaker by using a mechanical characteristic tester are mainly used. However, manual inspection is limited by many factors such as business level and mental state, which will affect the detection quality and even create potential safety hazards due to missed inspection and false inspection. Although the mechanical characteristic detection method is widely accepted by operators in the use process and achieves certain effect, the problems of heavy detection equipment, low detection efficiency, complex detection technology and the like exist. Therefore, the on-site detection device for the opening and closing coils of the circuit breaker, which is more sensitive, reliable and convenient, is needed to solve the problems.
Compared with the prior art, the invention has the following beneficial effects:
the detection unit comprises two paths of repetitive pulse generators, a 220V alternating current power supply, an isolation filtering amplification module, a two-channel high-speed oscilloscope and a USB communication interface; during detection, the two repeated pulse generators output two paths of identical repeated pulses which are respectively connected to two ends of the opening and closing coil of the circuit breaker. Meanwhile, the 220V alternating current power supply outputs current, voltage and conduction time which are the same as those of the operation working condition. Pulse signals at two ends of the coil are respectively input into a channel I and a channel II of the high-speed oscilloscope through an isolation module, a filtering module and an amplification module, so that the high-speed acquisition of the pulse signals is realized; the collected data are transmitted to the analysis host computer through USB signals for analysis. Compared with manual and mechanical detection, the detection method for the opening and closing coil of the circuit breaker has higher sensitivity.
The analysis unit controls the generation and stop of the repetitive pulse in the detection unit, the on and off of the 220V alternating current power supply, the transmission of the data acquired by the high-speed oscilloscope and the like through the USB interface, and finally completes the functions of characteristic waveform calculation, fault severity judgment, historical data storage, analysis report generation and the like.
When the detection device is used, the connection with the opening and closing coil of the circuit breaker is easy to operate, the efficiency is high, and compared with a heavy mechanical detector, the detection device is more convenient to carry and can carry out efficient field operation.
Drawings
FIG. 1: the invention discloses a structural schematic diagram of a circuit breaker opening and closing coil repetitive pulse method detection device;
FIG. 2: the invention discloses a flow schematic diagram of a circuit breaker opening and closing coil repetitive pulse method detection method;
wherein: the device comprises a detection unit 1, an analysis unit 2, a USB communication interface 3, a first 4-repetitive pulse generator, a second 5-repetitive pulse generator, an AC power supply 6-220V, a first 7-channel of a high-speed oscilloscope, a second 8-channel of the high-speed oscilloscope, a first 9-signal conditioning module, a second 10-signal conditioning module, a switching-on/off coil of a circuit breaker 11 and a 12-GND interface.
Detailed Description
The present invention will be further described with reference to the following examples.
Referring to fig. 1, the device for detecting the repetitive pulse method of the opening and closing coil of the circuit breaker comprises a detection unit 1 and an analysis unit 2, the detection unit 1 is connected with the analysis unit 2 through a USB communication interface 3, the detection unit 1 comprises a first repetitive pulse generator 4, a second repetitive pulse generator 5, a 220V alternating current power supply 6 and a high-speed oscilloscope, the first repetitive pulse generator 4 is connected with one end of the breaker opening and closing coil 11, the second repetitive pulse generator 5 is connected with the other end of the breaker opening and closing coil 11, the 220V alternating current power supply 6 is respectively connected with two ends of the breaker opening and closing coil 11, a channel I7 of the high-speed oscilloscope is connected with one end of the breaker opening and closing coil 11 through a signal conditioning module I9, and a second channel 8 of the high-speed oscilloscope is connected with the other end of the circuit breaker opening and closing coil 11 through a second signal conditioning module 10.
In the invention, the first repetitive pulse generator 4 and the second repetitive pulse generator 5 output identical repetitive pulses, and the repetitive frequency range is in a high frequency range and is above 300 MHz.
The 220V alternating current power supply 6 outputs current, voltage and conduction time which are the same as the operation condition of the opening and closing coil 11 of the circuit breaker, and is controlled by the analysis unit 2.
The first signal conditioning module 9 and the second signal conditioning module 10 are both isolation, filtering and amplification modules, and have functions of sequentially isolating, filtering and amplifying pulse signals, such as: NSC-3004.
The detection unit 1 is connected with the breaker opening and closing coil 11 through the GND interface 12 to ensure safety.
The analysis unit 2 comprises a power-on self-test module, a sampling initialization module, a pulse generation circuit initialization module, a pulse injection characteristic waveform display module, a fault severity factor calculation and judgment module, a data storage module and an analysis report generation module which are sequentially and electrically connected. The power-on self-test module is used for performing power-on self-test on each functional module of the detection unit 1 to determine whether each functional module of the detection unit 1 is normal, and the power-on self-test is the prior art. The sampling initialization module is used for specifically initializing parameters of the high-speed oscilloscope. The pulse generation circuit initialization module initializes a first repetitive pulse generator 4 and a second repetitive pulse generator 5. The three modules are all the contents of the preparation stage. The pulse injection characteristic waveform display module is used for collecting and displaying the generated pulse signal by the analysis unit 2. The fault severity factor calculating and judging module is used for calculating a fault severity factor based on the acquired pulse signal by the analyzing unit 2 so as to judge the fault severity. The data storage module is used for storing the analyzed data and the analyzed result. The analysis report generation module generates a text or a chart for viewing according to the judgment result made by the analysis unit 2. The functions of the above modules which are realized independently are all conventional in the art.
Referring to fig. 2, a method for detecting by using a circuit breaker opening and closing coil repetitive pulse method detection device includes the following steps:
s1: the detection unit 1 is electrically connected with the breaker opening and closing coil 11 and the analysis unit 2 respectively, the analysis unit 2 is started, each functional module of the detection unit 1 is subjected to power-on self-test, if the detection is normal, the step S2 is carried out, and if the detection is abnormal, the detection is ended;
s2: the power-on self-test is normal, the analysis unit 2 starts to test, and a default acquisition parameter is used for initializing an acquisition system, wherein the acquisition system comprises a high-speed oscilloscope, a first channel 7 of the high-speed oscilloscope is connected with one end of a circuit breaker opening and closing coil 11 through a first signal conditioning module 9, and a second channel 8 of the high-speed oscilloscope is connected with the other end of the circuit breaker opening and closing coil 11 through a second signal conditioning module 10;
s3: initializing a pulse generating circuit, wherein the pulse generating circuit consists of a first repetitive pulse generator 4 and a second repetitive pulse generator 5, the first repetitive pulse generator 4 is connected with one end of a breaker opening and closing coil 11, and the second repetitive pulse generator 5 is connected with the other end of the breaker opening and closing coil 11;
s4: after the initialization is finished, the acquisition system enters into a trigger waiting state, pulses are injected into the first repetitive pulse generator 4 and the second repetitive pulse generator 5, the system is triggered, and the step S5 is executed;
s5: acquiring and displaying pulse signals, and storing the pulse signals to a magnetic disk; if the system trigger is abandoned, the process returns to step S4;
s6: performing fault judgment, reading the file data by the analysis unit 2, judging the fault degree, and finishing detection; if the failure determination is abandoned, the process returns to step S4.
The fault severity of the circuit breaker opening and closing coil 11 can be obtained based on the implementation of the detection method, and the fault severity can be visually obtained by the analysis unit 2 without human intervention, so that the detection efficiency is high, and the detection result is reliable.
Although specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the appended claims.
Claims (7)
1. The utility model provides a circuit breaker divide-shut brake coil repetitive pulse method detection device which characterized in that: the detection unit is connected with the analysis unit through a USB communication interface, the detection unit comprises a first repetitive pulse generator, a second repetitive pulse generator, a 220V alternating current power supply and a high-speed oscilloscope, the first repetitive pulse generator is connected with one end of a circuit breaker opening and closing coil, the second repetitive pulse generator is connected with the other end of the circuit breaker opening and closing coil, the 220V alternating current power supply is connected with two ends of the circuit breaker opening and closing coil respectively, the first channel of the high-speed oscilloscope is connected with one end of the circuit breaker opening and closing coil through a first signal conditioning module, and the second channel of the high-speed oscilloscope is connected with the other end of the circuit breaker opening and closing coil through a second signal conditioning module.
2. The circuit breaker opening and closing coil repetitive pulse method detection device according to claim 1, characterized in that: and the first repetitive pulse generator and the second repetitive pulse generator output identical repetitive pulses.
3. The circuit breaker opening and closing coil repetitive pulse method detection device according to claim 1, characterized in that: and the 220V alternating current power supply outputs current, voltage and conduction time which are the same as the operation working condition of the opening and closing coil of the circuit breaker.
4. The circuit breaker opening and closing coil repetitive pulse method detection device according to claim 1, characterized in that: and the first signal conditioning module and the second signal conditioning module are both isolation, filtering and amplification modules.
5. The circuit breaker opening and closing coil repetitive pulse method detection device according to claim 1, characterized in that: and the detection unit is connected with the opening and closing coil of the circuit breaker through a GND interface.
6. The circuit breaker opening and closing coil repetitive pulse method detection device according to claim 1, characterized in that: the analysis unit comprises a power-on self-test module, a sampling initialization module, a pulse generation circuit initialization module, a pulse injection characteristic waveform display module, a fault severity factor calculation and judgment module, a data storage module and an analysis report generation module which are sequentially and electrically connected.
7. A circuit breaker opening and closing coil repetitive pulse method detection method is characterized in that: the method comprises the following steps:
s1: the detection unit is electrically connected with the circuit breaker opening and closing coil and the analysis unit respectively, the analysis unit is started, each functional module of the detection unit is subjected to power-on self-test, if the detection is normal, the step S2 is carried out, and if the detection is abnormal, the detection is finished;
s2: the method comprises the steps that power-on self-test is normal, an analysis unit starts to test, and a default acquisition parameter is used for initializing an acquisition system, wherein the acquisition system comprises a high-speed oscilloscope, a first channel of the high-speed oscilloscope is connected with one end of a circuit breaker opening and closing coil through a first signal conditioning module, and a second channel of the high-speed oscilloscope is connected with the other end of the circuit breaker opening and closing coil through a second signal conditioning module;
s3: initializing a pulse generating circuit, wherein the pulse generating circuit consists of a first repetitive pulse generator and a second repetitive pulse generator, the first repetitive pulse generator is connected with one end of a breaker opening and closing coil, and the second repetitive pulse generator is connected with the other end of the breaker opening and closing coil;
s4: after the initialization is finished, the acquisition system enters into trigger waiting, the first repetitive pulse generator and the second repetitive pulse generator are injected with pulses, the system is triggered, and the step S5 is executed;
s5: acquiring and displaying pulse signals, and storing the pulse signals to a magnetic disk; if the system trigger is abandoned, the process returns to step S4;
s6: performing fault judgment, reading file data by an analysis unit, judging the fault degree, and finishing detection; if the failure determination is abandoned, the process returns to step S4.
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| CN202011172135.8A CN112198426A (en) | 2020-10-28 | 2020-10-28 | Circuit breaker divide-shut brake coil repetitive pulse method detection device |
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| CN202011172135.8A CN112198426A (en) | 2020-10-28 | 2020-10-28 | Circuit breaker divide-shut brake coil repetitive pulse method detection device |
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| CN202011172135.8A Pending CN112198426A (en) | 2020-10-28 | 2020-10-28 | Circuit breaker divide-shut brake coil repetitive pulse method detection device |
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