CN107884709A - A kind of breaker detecting system - Google Patents

Abstract

The invention discloses a circuit breaker detection system. The stroke of the circuit breaker is detected by the non-contact eddy current sensor in the non-contact detection device, the electric signal of the circuit breaker is detected by the non-contact electromagnetic sensor, and the signal analysis equipment receives the stroke, electric Signal and analyze the fault of the circuit breaker according to the stroke and electrical signal. Therefore, when the non-contact detection device is used to detect the circuit breaker, the detection device can be installed outside the circuit breaker, and the signal analysis equipment can be used to analyze the output signal of the non-contact detection device installed outside the circuit breaker to realize the fault analysis of the circuit breaker. The detection of the circuit breaker avoids the problem that the circuit breaker must be powered off when the test sensor is installed on the circuit breaker, and improves the detection efficiency of the circuit breaker.

Description

A circuit breaker detection system

technical field

The invention relates to the field of electric power detection, in particular to a circuit breaker detection system.

Background technique

With the development of science and technology, the installed capacity of the power system and the demand for motors continue to increase, which puts forward higher and higher requirements for the reliability and economy of the power system. As the link between power generation and power distribution in the power system, the circuit breaker is responsible for connecting electrical equipment or lines to the grid or withdrawing from operation, and plays a role in operation control; when electrical equipment and lines fail, it can quickly cut off the faulty line to ensure that The faulty part runs normally and plays the role of running protection. However, the circuit breaker is also a kind of circuit equipment with the most frequency of failure, maintenance and parameter measurement. It has a high failure rate during operation, which is easy to cause power grid accidents and cause large economic losses. Its reliability is important for protecting the safety of the power grid. Significant.

According to the research data, most of the faults of circuit breakers are caused by mechanical reasons. At present, the main testing methods for circuit breakers include on-line detection and power failure experiment. On the one hand, the online detection is to monitor the operating status of the circuit breaker when the circuit breaker is under load, and judge the state of the circuit breaker through the monitored state data; Carry out action experiments, monitor the experimental results, and compare the monitoring results with the factory test results to determine the state of the circuit breaker. However, when the above two methods are used to detect the circuit breaker, it is necessary to install the test sensor and test equipment in the power failure state after the circuit breaker is out of operation and in the isolated state to carry out the circuit breaker detection, which wastes a lot of manpower and material resources, and the detection efficiency is low.

Therefore, how to improve the detection efficiency of the circuit breaker is a problem to be solved by those skilled in the art.

Contents of the invention

The purpose of the present invention is to provide a circuit breaker detection system, which improves the detection efficiency of the circuit breaker.

In order to achieve the above object, an embodiment of the present invention provides a circuit breaker detection system, including: a non-contact detection device, a device connected to the non-contact detection device for receiving an output signal of the non-contact detection device a signal analysis device to perform fault analysis on the circuit breaker according to the output signal;

The non-contact detection device includes: a non-contact eddy current sensor for detecting the stroke of the circuit breaker, and a non-contact electromagnetic sensor for detecting the electrical signal of the circuit breaker.

Preferably, the non-contact electromagnetic sensor is specifically a non-contact current sensor.

Preferably, the non-contact current sensor is used to detect the opening current and closing current of the opening and closing control circuit connected to the circuit breaker, and detect the energy storage circuit of the energy storage control circuit connected to the circuit breaker current.

Preferably, the circuit breaker detection system further includes: a power control box that provides power to the circuit breaker when the circuit breaker is powered off.

Preferably, the power control box is connected to the circuit breaker through a nine-pin aviation plug.

Preferably, the power supply control box includes: a target power supply, a filter connected to the target power supply for amplifying the voltage or current of the target power supply, and a protection circuit connected to the filter. Preferably, the signal analysis device includes: a signal receiving circuit for receiving the output signal, a single-chip microcomputer connected to the signal receiving circuit to extract the signal corresponding to the circuit breaker from the output signal through the single-chip microcomputer data and perform fault analysis on the circuit breaker based on the data.

Preferably, the signal analysis device further includes: a B-code clock circuit connected to the single-chip microcomputer, so as to synchronize the time of the signal analysis device with the non-contact detection device.

Preferably, the circuit breaker detection system further includes: a human-computer interaction device connected to the non-contact detection device and the signal analysis device to control the non-contact detection device and the signal analysis device through the human-computer interaction device Signal analysis equipment described above.

Preferably, the human-computer interaction device includes: a wavelet packet decomposition circuit connected to the single-chip microcomputer for decomposing the data so as to predict the fault of the circuit breaker.

It can be seen that in this scheme, the stroke of the circuit breaker is detected by the non-contact eddy current sensor in the non-contact detection device, and the electric signal of the circuit breaker is detected by the non-contact electromagnetic sensor. Electrical signals for fault analysis of circuit breakers. Therefore, when the non-contact detection device is used to detect the circuit breaker, the detection device can be installed outside the circuit breaker, and the signal analysis equipment can be used to analyze the output signal of the non-contact detection device installed outside the circuit breaker. The detection of the circuit breaker avoids the problem that the circuit breaker must be powered off when the test sensor is installed on the circuit breaker, and improves the detection efficiency of the circuit breaker.

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 a schematic structural diagram of a circuit breaker detection system provided by the first embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a circuit breaker detection system provided by the second embodiment of the present invention;

Fig. 3 is a schematic structural diagram of a circuit breaker detection system provided by the second embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

The embodiment of the invention discloses a circuit breaker detection system, which improves the detection efficiency of the circuit breaker.

Please refer to Fig. 1, Fig. 1 is a schematic structural diagram of a circuit breaker detection system provided by the first embodiment of the present invention, including: a non-contact detection device 10, connected to the non-contact detection device 10 for receiving non-contact The signal analysis device 20 for detecting the output signal of the device 10 is used to analyze the fault of the circuit breaker according to the output signal;

The non-contact detection device 10 includes: a non-contact eddy current sensor 101 for detecting the stroke of the circuit breaker, and a non-contact electromagnetic sensor 102 for detecting the electrical signal of the circuit breaker.

Specifically, the non-contact detection device 10 in this embodiment can be installed outside the system where the circuit breaker is located. According to the specific application environment, the non-contact detection device 10 can detect when the circuit breaker is powered on and powered off. When the circuit breaker When the circuit breaker is in a live running state, the non-contact detection device 10 is installed outside the circuit breaker; when the circuit breaker is in a power failure state, the non-contact detection device 10 can be installed inside or outside the circuit breaker. The specific installation location of the non-contact detection device 10 is installed according to the specific application environment, and is not limited here.

The corresponding signal analysis device 20 is installed correspondingly according to the installation position of the non-contact detection device 10 , and the specific installation position of the signal analysis device 20 is installed according to a specific test environment, which is not limited here.

Further, the non-contact eddy current sensor 101 in this embodiment can be a non-contact eddy current displacement sensor to test the stroke of the circuit breaker, wherein the stroke of the circuit breaker is during the operation of opening or closing the circuit breaker , the distance that the moving contact continues to move after the contact of the circuit breaker; the non-contact electromagnetic sensor 102 is used to test the voltage or current sensor of the circuit breaker, for example, a non-contact current sensor, a non-contact voltage sensor, etc.; a non-contact The electric current of type electromagnetic sensor 102 testing circuit breaker is the main circuit current of the circuit breaker main circuit that is connected with non-contact electromagnetic sensor 102, the energy storage circuit current of the energy storage control circuit that is connected with non-contact electromagnetic sensor 10 and the current of the energy storage circuit connected with non-contact electromagnetic sensor 102. The opening current and closing current of the opening and closing control loop connected with the type electromagnetic sensor 102. Correspondingly, the voltage of the circuit breaker tested by the non-contact electromagnetic sensor 102 is the main circuit voltage of the main circuit of the circuit breaker connected with the non-contact electromagnetic sensor 102, the energy storage circuit of the energy storage control circuit connected with the non-contact electromagnetic sensor 102 voltage and the opening voltage and closing voltage of the opening and closing control loop connected to the non-contact electromagnetic sensor 102 .

It should be noted that both the non-contact eddy current sensor 101 for detecting the stroke of the circuit breaker and the non-contact electromagnetic sensor 102 for detecting the electrical signal of the circuit breaker can detect the stroke or electrical signal of the circuit breaker in the power-off state or the electrified state.

It can be seen that in the circuit breaker detection system provided by the embodiment of the present invention, the stroke of the circuit breaker is detected by the non-contact eddy current sensor 101 in the non-contact detection device 10, and the electric signal of the circuit breaker is detected by the non-contact electromagnetic sensor 102. The signal analysis device 20 receives the travel and electrical signals and performs fault analysis on the circuit breaker according to the travel and electrical signals. Therefore, when the non-contact detection device is used to detect the circuit breaker, the detection device can be installed outside the circuit breaker, and the signal analysis equipment can be used to analyze the output signal of the non-contact detection device installed outside the circuit breaker. The detection of the circuit breaker avoids the problem that the circuit breaker must be powered off when the test sensor is installed on the circuit breaker, and improves the detection efficiency of the circuit breaker.

Based on the above embodiments, in this embodiment, the non-contact electromagnetic sensor 102 is specifically a non-contact current sensor.

Based on the above embodiment, in this embodiment, the non-contact current sensor is used to detect the opening current and closing current of the opening and closing control circuit connected to the circuit breaker, and detect the energy storage control circuit connected to the circuit breaker. able loop current.

Based on the above embodiments, in this embodiment, the circuit breaker detection system further includes: a power control box that provides power to the circuit breaker when the circuit breaker is powered off.

Specifically, in this embodiment, when the circuit breaker is powered off, it means that the circuit breaker needs to carry out the circuit breaker power failure experiment test under the power failure state; when the circuit breaker needs to perform the circuit breaker test under the power failure state, the power control box is the The circuit breaker provides the test voltage. Therefore, the test of the circuit breaker is carried out under the experimental voltage provided by the power control box.

It can be seen that in this embodiment, when the circuit breaker is in a power-off state, the power control box provides the circuit breaker with an experimental voltage to ensure that the circuit breaker performs a power-off test in the power-off state, thereby obtaining power-off test data to judge the working state of the circuit breaker .

Based on the above embodiments, in this embodiment, the power control box is connected to the circuit breaker through a nine-pin aviation plug.

Based on the above embodiments, in this embodiment, the power control box includes: a target power supply, a filter connected to the target power supply for amplifying the voltage or current of the target power supply, and a protection circuit connected to the filter. Specifically, the target power supply in this embodiment is an experimental voltage lower than the normal power supply voltage. For example, if the voltage of the power system where the breaker is located is 220V, the rated voltage of the target power supply should generally be much lower than 220V, such as 30V . Of course, according to the specific test environment, the rated voltage of the target power supply can also be determined according to the specific test environment, which is not limited here; the filter is used to amplify the voltage or current of the target power supply, when the voltage or current provided by the target power supply is insufficient To test the working state of the circuit breaker, the voltage or current is amplified by the filter to reach the test voltage of the test circuit breaker; the protection circuit is to protect the circuit breaker from being damaged under abnormal voltage.

Please refer to FIG. 2, which is a schematic structural diagram of a circuit breaker detection system provided by the second embodiment of the present invention;

As shown in FIG. 2, based on the above-mentioned embodiment, in this embodiment, the signal analysis device 20 includes: a signal receiving circuit 201 for receiving the output signal, and a single-chip microcomputer 202 connected to the signal receiving circuit 201 to pass through the The single-chip microcomputer 202 extracts data corresponding to the circuit breaker from the output signal and performs fault analysis on the circuit breaker according to the data.

Specifically, in this embodiment, after receiving the output signal of the non-contact detection device 10, the signal receiving circuit 201 analyzes and processes the output signal through each functional module in the signal analysis device 20, wherein the signal analysis device 20 The hardware for analyzing and processing the signal is the single-chip microcomputer 202, which has the following functional modules, including: a feature extraction module, which is used to extract action data and feature quantities related to the circuit breaker from the output signal of the live test or power failure test , data marks and other relevant data; the feature database module is used to collect the live test data and power failure test data of the circuit breaker; the reasoning mechanism module is used to judge the effective range of the collected feature data, if the parameters in the feature exceed If the inference setting range is set, the inference rule corresponding to this parameter will be activated, so as to perform preliminary diagnosis and analysis on the fault of the circuit breaker. At the same time, the module can also automatically adjust the scope of reasoning rules through the collected live test data and blackout test data of the circuit breaker, and establish relevant evaluation rules for live test data and blackout test data.

Further, before receiving the output signal, the signal analysis device 20 performs noise reduction processing on the output signal to obtain a purer output signal.

It can be seen that in this embodiment, by analyzing the output signal, the data corresponding to the circuit breaker is extracted, and the fault analysis of the circuit breaker is performed based on the data, and the working state of the circuit breaker is detected in real time, and the detection efficiency higher.

Based on the above-mentioned embodiments, in this embodiment, the signal analysis device 20 further includes: a B-code clock circuit connected to the single-chip microcomputer, so as to synchronize the time between the signal analysis device 20 and the non-contact detection device 10 .

Specifically, the B code clock circuit in this embodiment is used to synchronize the time of the signal analysis device 20 and the non-contact detection device 10; further, the device for synchronizing the time of the signal analysis device 20 and the non-contact detection device 10 It can also be GPS satellite synchronization, which time synchronization device to choose is determined according to the specific test environment of the circuit breaker, and is not limited here.

It can be seen that in this embodiment, the time of the signal analysis device and the non-contact detection device is kept synchronized by the B code clock circuit, thereby realizing the synchronization between the output signal of the non-contact detection device and the signal analysis device, and avoiding signal analysis. The problem of inaccurate fault analysis caused by the untimely reception of the output signal caused by the time asynchrony between the equipment and the non-contact detection device.

Please refer to Fig. 3, Fig. 3 is a schematic structural diagram of a circuit breaker detection system provided by the second embodiment of the present invention;

As shown in Figure 3, based on the above-mentioned embodiment, in this embodiment, the circuit breaker detection system also includes: a human-computer interaction device 30 connected to the non-contact detection device 10 and the signal analysis device 20 to pass through the human-computer interaction device 30 Control the non-contact detection device 10 and the signal analysis device 20 .

Specifically, the human-computer interaction device 30 in this embodiment controls the non-contact detection device 10 and the signal analysis device 20 to detect and analyze the circuit breaker. The non-contact eddy current sensor 101 and the non-contact electromagnetic sensor are managed, and at the same time, the live test data and power failure test data of the breaker collected in the signal analysis device 20 are selected, and the circuit breaker in the signal analysis device is selected. The data features are decomposed and compared with the fault data in the database in the human-computer interaction device 30 for fault prediction.

It can be seen that in the embodiment of the present invention, the non-contact detection device and the signal processing device are controlled by the human-computer interaction device so as to realize the overall control of the circuit breaker and improve the work efficiency of the maintenance personnel.

Based on the above-mentioned embodiments, in this embodiment, the human-computer interaction device 30 includes: a wavelet packet decomposition circuit connected to a single-chip microcomputer for decomposing data to perform fault prediction on circuit breakers.

Specifically, the wavelet packet analysis circuit in this embodiment decomposes the live test characteristics and power failure test characteristics of the circuit breaker into different time domains and frequency domains, so as to find the distortion points from the time domain and frequency domain, and compare them with the man-machine The fault database in the interactive device is compared, so that the fault warning of the circuit breaker can be made according to the comparison result, and the purpose of fault prediction of the circuit breaker can be achieved.

A circuit breaker detection system provided by the present application has been introduced in detail above. In this paper, specific examples are used to illustrate the principles and implementation methods of the present application, and the descriptions of the above embodiments are only used to help understand the methods and core ideas of the present application. It should be pointed out that those skilled in the art can make some improvements and modifications to the application without departing from the principles of the application, and these improvements and modifications also fall within the protection scope of the claims of the application.

Each embodiment in the description is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other. As for the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and for the related information, please refer to the description of the method part.

It should also be noted that in this specification, relative terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that these entities or operations There is no such actual relationship or order between the operations. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

Claims (10)

1. A circuit breaker detection system, characterized in that, comprising: A non-contact detection device, a signal analysis device connected to the non-contact detection device for receiving the output signal of the non-contact detection device to perform fault analysis on the circuit breaker according to the output signal; The non-contact detection device includes: a non-contact eddy current sensor for detecting the stroke of the circuit breaker, and a non-contact electromagnetic sensor for detecting the electrical signal of the circuit breaker. 2. The circuit breaker detection system according to claim 1, wherein the non-contact electromagnetic sensor is specifically a non-contact current sensor. 3. The circuit breaker detection system according to claim 2, wherein the non-contact current sensor is used to detect the opening current and closing current of the opening and closing control loop connected to the circuit breaker, and the detection and The energy storage circuit current of the energy storage control circuit connected to the circuit breaker. 4. The circuit breaker detection system according to claim 1, further comprising: a power control box for providing power to the circuit breaker when the circuit breaker is powered off. 5. The circuit breaker detection system according to claim 4, wherein the power control box is connected to the circuit breaker through a nine-pin aviation plug. 6. The circuit breaker detection system according to claim 5, wherein the power control box comprises: a target power supply, a filter connected to the target power supply for amplifying the voltage or current of the target power supply, A protection circuit connected with the filter. 7. The circuit breaker detection system according to claim 1, characterized in that, the signal analysis device comprises: a signal receiving circuit for receiving the output signal, a single-chip microcomputer connected with the signal receiving circuit to pass through the The single-chip microcomputer extracts data corresponding to the circuit breaker from the output signal and performs fault analysis on the circuit breaker according to the data. 8. The circuit breaker detection system according to claim 7, characterized in that, the signal analysis device also includes: a B code clock circuit connected to the single-chip microcomputer, so that the signal analysis device and the non-contact Time synchronization of detection devices. 9. The circuit breaker detection system according to any one of claims 1-8, characterized in that, the circuit breaker detection system further comprises: a man-machine connected to the non-contact detection device and the signal analysis device An interaction device is used to control the non-contact detection device and the signal analysis device through the human-computer interaction device. 10. The circuit breaker detection system according to claim 9, wherein the human-computer interaction device comprises: a wavelet packet decomposition circuit connected with the single chip microcomputer for decomposing the data to perform failure prediction.