Transient current detection system and method for switching-on and switching-off process of switch

Abstract

The invention discloses a transient current detection system and method for a switch opening and closing process. The system comprises a sensing unit, a data acquisition and transmission unit and a data analysis and processing unit, the sensing unit comprises an open type hollow coil sensor and an optical correction loop; the open-type hollow coil sensor outputs a current signal generated in the opening and closing process of the switch and transmits the current signal to the data acquisition and transmission unit; the data acquisition and transmission unit converts the current signal into a digital signal and transmits the digital signal to the data analysis and processing unit; an optical detection circuit of the data analysis processing unit is used for emitting a correction optical signal, transmitting the correction optical signal to an optical correction loop and receiving a return optical signal emitted by the optical correction loop; analyzing the return optical signal, judging the state of the open type hollow coil sensor, and determining the error compensation amount; and the data analysis module receives and analyzes the parameters of the digital signal, adjusts the parameters of the digital signal based on the error compensation amount, and outputs a final detection result.

Description

Technical Field

[0001] The present invention relates to the technical field of process monitoring of switch equipment, and more specifically, to a transient current detection system and method for a switch opening and closing process. Background Art

[0002] Switch equipment is one of the key equipment in the power system, and its role in the power system is very important. Under high-voltage environment, the switch opening and closing process will generate high-frequency current and voltage signals, which will be transmitted to the secondary equipment behind by conduction or radiation, causing electromagnetic interference to it, making the secondary equipment abnormal or even faulty. Since the transient signal in the switch opening and closing process has high frequency and large amplitude, it can be used as an important transient strong electromagnetic interference source, and then other power equipment can be tested for electromagnetic interference, so as to promptly discover problems with the equipment and ensure the safe and stable operation of the power system.

[0003] In order to study the impact of transient electromagnetic disturbances such as switch opening and closing, circuit breaker creepage discharge, etc. on other power equipment, it is necessary to detect the high-frequency current signal in the switch opening and closing process in real time and accurately. Prior art 1 (application: CN202210486001.6) proposes a detection device and method for the isolation switch transmission system, which is mainly aimed at the detection of the transmission system, rather than the detection of line voltage and current in the switch opening and closing process. Prior art 2 (application: CN202210819437.2) proposes an online monitoring system for the separation and closing state of a GIS isolation switch, including: a data acquisition module, a receiving module, a data analysis module, etc. However, prior art 2 does not involve high-precision electrical signal sensing technology in the opening and closing process. Portable sensing technology is the first key module to realize the monitoring of the opening and closing process. Only with high-performance sensing technology can the high-frequency signal in the opening and closing process be accurately sensed and then transmitted to the subsequent data acquisition unit. Therefore, the research on high-performance portable transient current detection system is very necessary. Summary of the invention

[0004] The technical solution of the present invention provides a transient current detection system and method for a switch opening and closing process, so as to solve the problem of how to detect the transient current in the switch opening and closing process.

[0005] In order to solve the above problems, the present invention provides a transient current detection system for a switch opening and closing process, the system comprising: a sensing unit, a data acquisition and transmission unit, and a data analysis and processing unit;

[0006] The sensing unit includes an open-type hollow coil sensor and an optical correction circuit; the open-type hollow coil sensor outputs a current signal generated during the switch opening and closing process, and transmits the current signal to the data acquisition and transmission unit;

[0007] The data acquisition and transmission unit is used to receive the current signal, convert the current signal into a digital signal, and transmit the digital signal to the data analysis and processing unit;

[0008] The data analysis and processing unit includes a light detection circuit and a data analysis module. The light detection circuit is used to emit a correction light signal, transmit the correction light signal to the optical correction circuit, and receive a return light signal emitted by the optical correction circuit; the return light signal is analyzed by the data analysis module to judge the state of the open-type hollow coil sensor, and the error compensation amount is determined based on the state of the open-type hollow coil sensor; the data analysis module receives and analyzes the parameters of the digital signal, adjusts the parameters of the digital signal based on the error compensation amount, and outputs the adjusted final detection result.

[0009] Preferably, the open-type air-core coil sensor and the optical correction loop are combined into a whole and are closed or opened at the same time.

[0010] Preferably, the open-type hollow coil sensor includes two semi-annular sensors, each of which is tightly wound; the two semi-annular sensors are wound sequentially and connected end to end.

[0011] Preferably, the step of analyzing the returned optical signal to determine the state of the open-type air-core coil sensor includes:

[0012] By analyzing the returned optical signal, it is determined whether there is an open air gap in the open-type hollow coil sensor and the size of the open air gap.

[0013] Preferably, the method further comprises: determining the size of the open air gap of the open-type hollow coil sensor by analyzing the attenuation ratio of the optical power of the correction optical signal and the return optical signal.

[0014] Preferably, the data acquisition and transmission unit transmits the digital signal to the data analysis and processing unit via an optical fiber.

[0015] Preferably, the data analysis module evaluates the state of the switch according to parameter changes of the digital signal during the process of opening and closing the switch.

[0016] Based on another aspect of the present invention, the present invention provides a transient current detection method for a switch opening and closing process, the method comprising: a sensing unit, a data acquisition and transmission unit, and a data analysis and processing unit;

[0017] Outputting the current signal generated during the switch opening and closing process through the open-type hollow coil sensor of the sensing unit, and transmitting the current signal to the data acquisition and transmission unit;

[0018] The data acquisition and transmission unit is used to receive the current signal, convert the current signal into a digital signal, and transmit the digital signal to a data analysis and processing unit;

[0019] The optical detection circuit of the data analysis and processing unit is used to emit a correction light signal, and transmit the correction light signal to the optical correction circuit of the sensing unit, and receive a return light signal emitted by the optical correction circuit; the data analysis module of the data analysis and processing unit analyzes the return light signal to judge the state of the open-type hollow coil sensor, and determines the error compensation amount based on the state of the open-type hollow coil sensor; the data analysis module receives and analyzes the parameters of the digital signal, adjusts the parameters of the digital signal based on the error compensation amount, and outputs the adjusted final detection result.

[0020] Preferably, the open-type air-core coil sensor and the optical correction loop are combined into a whole and are closed or opened at the same time.

[0021] Preferably, the open-type hollow coil sensor includes two semi-annular sensors, each of which is tightly wound; the two semi-annular sensors are wound sequentially and connected end to end.

[0022] Preferably, the step of analyzing the returned optical signal to determine the state of the open-type air-core coil sensor includes:

[0023] By analyzing the returned optical signal, it is determined whether there is an open air gap in the open-type hollow coil sensor and the size of the open air gap.

[0024] Preferably, the method further comprises: determining the size of the open air gap of the open-type hollow coil sensor by analyzing the attenuation ratio of the optical power of the correction optical signal and the return optical signal.

[0025] Preferably, the data acquisition and transmission unit transmits the digital signal to the data analysis and processing unit via an optical fiber.

[0026] Preferably, the data analysis module evaluates the state of the switch according to parameter changes of the digital signal during the process of opening and closing the switch.

[0027] Based on another aspect of the present invention, the present invention provides a computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program, and the computer program is used to execute a transient current detection method for a switch opening and closing process.

[0028] Based on another aspect of the present invention, the present invention provides an electronic device, characterized in that the electronic device comprises: a processor and a memory; wherein,

[0029] The memory is a memory for storing instructions executable by the processor;

[0030] The processor is used to read the executable instructions from the memory and execute the instructions to implement a transient current detection method for a switch opening and closing process.

[0031] The technical solution of the present invention provides a transient current detection system and method for the switch opening and closing process, wherein the system includes: a sensing unit, a data acquisition and transmission unit, and a data analysis and processing unit; the sensing unit includes an open hollow coil sensor and an optical correction circuit; the current signal generated during the switch opening and closing process is output by the open hollow coil sensor, and the current signal is transmitted to the data acquisition and transmission unit; the data acquisition and transmission unit is used to receive the current signal, convert the current signal into a digital signal, and transmit the digital signal to the data analysis and processing unit; the data analysis and processing unit includes a light detection circuit and a data analysis module, the light detection circuit is used to emit a correction light signal, transmit the correction light signal to the optical correction circuit, and receive a return light signal emitted by the optical correction circuit; the return light signal is analyzed by the data analysis module to determine the state of the open hollow coil sensor, and the error compensation amount is determined based on the state of the open hollow coil sensor; the data analysis module receives and analyzes the parameters of the digital signal, adjusts the parameters of the digital signal based on the error compensation amount, and outputs the adjusted final detection result. The technical solution of the present invention provides a portable transient current detection system for the switch opening and closing process, and designs a portable sensing unit to achieve safe and convenient access and exit without interrupting the line on site, greatly improving the efficiency of field experiments and tests. The design of the optical correction circuit is simple and easy, and can accurately determine whether there is an open air gap in the open-type hollow coil sensor and perform error compensation, greatly improving the measurement accuracy of the open-type sensor; the data analysis and processing unit can analyze and process the output signal of the sensor in real time, extract parameters, store waveforms, analyze and predict states, etc., effectively ensuring the safe and reliable operation of the switch. The technology of the present invention has the characteristics of easy installation and operation, wide measurement frequency band, and high accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] A more complete understanding of exemplary embodiments of the present invention may be obtained by referring to the following drawings:

[0033] Figure 1 A structural diagram of a transient current detection system for a switch opening and closing process according to a preferred embodiment of the present invention;

[0034] Figure 2A schematic diagram of the structure of a portable sensing unit according to a preferred embodiment of the present invention;

[0035] Figure 3 A schematic diagram of the structure of an open-type hollow coil sensor according to a preferred embodiment of the present invention;

[0036] Figure 4 It is a schematic diagram of the upper connection parts tightly docking when the closure is tight according to the preferred embodiment of the present invention;

[0037] Figure 5 is a schematic diagram of the misalignment of the upper connection part when there is an open air gap according to a preferred embodiment of the present invention; and

[0038] Figure 6 The present invention is a flow chart of a transient current detection method for a switch opening and closing process according to a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0039] Now, exemplary embodiments of the present invention are described with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms used in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0040] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0041] Figure 1 The structure diagram of a transient current detection system for a switch opening and closing process according to a preferred embodiment of the present invention.

[0042] The components of the electrical signal generated during the switch opening and closing process are complex, ranging from low frequency to high frequency, and include many components such as interharmonics, harmonics, noise, etc., which makes it difficult to detect accurately. In order to detect the complex transient current signal components during the switch opening and closing process, the present invention provides a portable transient current detection system for the switch opening and closing process. First, a portable high-precision current sensor design method is proposed, which realizes the live access and accuracy self-detection of the portable sensor, and ensures the accuracy of the sensing part. The output of the sensor is transmitted to the data acquisition and transmission unit, and then transmitted to the data analysis and processing unit for data analysis and processing, thereby providing support for the parameter control of the switch opening and closing test. The detection system can be easily connected to the switch opening and closing test system without the need for terminal lines and tests, and can be easily exited from the line, so as to timely diagnose and calibrate the detection system itself, thereby ensuring the accuracy and reliability of the detection process. At the same time, the detection system can realize comprehensive diagnosis of the switch operation status through data analysis and processing, so as to take preventive measures to avoid accidents.

[0043] The present invention provides a portable transient current detection system for a switch opening and closing process, such as Figure 1 As shown, it includes a portable sensing unit, a data acquisition and transmission unit, a data analysis and processing unit, etc. The portable sensing unit is used to sense the complex current signal of the switch opening and closing process, and transmit it to the data acquisition and transmission unit after conversion. The data acquisition and transmission unit converts the analog signal into a digital signal, and then transmits it to the data analysis and processing unit for analysis and processing. The data analysis and processing unit realizes parameter analysis of the sensor output signal, judgment of the size of the open air gap, error compensation, parameter analysis display, status monitoring and diagnosis, etc.

[0044] like Figure 1 As shown, the present invention provides a transient current detection system for a switch opening and closing process, the system comprising: a sensing unit, a data acquisition and transmission unit, and a data analysis and processing unit;

[0045] The sensing unit includes an open-type hollow coil sensor and an optical correction circuit; the open-type hollow coil sensor outputs a current signal generated during the switch opening and closing process, and transmits the current signal to the data acquisition and transmission unit;

[0046] Preferably, the open-type air-core coil sensor and the optical correction loop are combined into a whole and are closed or opened at the same time.

[0047] Preferably, the open-type hollow coil sensor includes two semi-annular sensors, each of which is tightly wound; the two semi-annular sensors are wound sequentially and connected end to end.

[0048] The portable sensing unit provided by the present invention is used for accurate sensing of complex transient current signals during the opening and closing process of a switch, and mainly includes two parts: an open-type hollow coil sensor and an optical correction circuit. Figure 2 As shown. The hollow coil sensor has the advantages of large dynamic range, wide measurement bandwidth, and no ferromagnetic saturation. It is suitable for currents with complex frequency components and a large measurement range. However, the closed-loop hollow coil sensor is inconvenient to install and maintain on site. If it is made into an open type, although it is convenient to install, it is impossible to judge whether it is tightly closed during measurement. Once it is not closed tightly, the open air gap has a greater impact on the output, seriously affecting the measurement accuracy of the sensor. For every 0.1mm increase in the open air gap, the error caused can reach more than 0.1% or even higher. Therefore, in order to improve the accuracy of the open hollow coil sensor, the present invention designs an optical correction circuit, combines it with the open hollow coil sensor, and uses the optical correction circuit to determine whether the sensor has an open air gap, and then calculates the size of the air gap and compensates for the error.

[0049] The open air coil sensor consists of two semi-circular sensors, such as Figure 3 As shown in the figure, each semi-circular sensor is wound in a dense manner, and the skeleton is made of non-magnetic material, such as epoxy resin. The winding is made of enameled wire, and the diameter of the enameled wire can be selected according to the number of turns. The winding method of the two semi-circular sensors is sequential winding and head-to-tail connection. After winding, they are connected to the loop embedded in the skeleton. The design of the embedded loop can effectively reduce the interference of the adjacent electromagnetic field on the sensor. The embedded loop also uses enameled wire and is embedded in the middle part of the semicircular skeleton. The two semi-circular sensors are combined to form a whole to realize the detection of current. The two semi-circular sensors are connected together at the bottom and can be opened or closed at the top. The output signal of the open hollow coil sensor is transmitted to the subsequent data acquisition and transmission unit through the shielded wire.

[0050] Optical correction circuit Figure 4 As shown. During installation design, the optical correction loop and the open hollow coil sensor form a whole and are closed or opened at the same time. When the open hollow coil sensor is not closed tightly, the connection part of the optical correction loop is misaligned ( Figure 5 ), resulting in the input light not being able to be fully transmitted back to the optical detection circuit, so the input light power is different from the output light power, and the output light power of the optical correction circuit is attenuated, and the attenuation value is proportional to the size of the air gap. The optical detection circuit detects the power attenuation between the output light and the input light, and the analysis and calculation can determine whether the sensor has an open air gap and the size of the open air gap, and then the output of the open air coil sensor can be compensated for the error to ensure the accuracy of the sensor. The communication method between the optical correction circuit and the optical detection circuit is optical fiber.

[0051] The data acquisition and transmission unit is used to receive the current signal, convert the current signal into a digital signal, and transmit the digital signal to the data analysis and processing unit;

[0052] The data acquisition and transmission unit of the present invention mainly realizes the analog-to-digital conversion of sensor signals and the framing processing of the converted data. After the framing processing, the conversion of electrical signals to optical signals is realized through the electro-optical conversion device HFBR1414, and is sent to the data analysis and processing unit through optical fiber in the required format.

[0053] The data analysis and processing unit includes a light detection circuit and a data analysis module. The light detection circuit is used to emit a correction light signal, transmit the correction light signal to an optical correction circuit, and receive a return light signal emitted by the optical correction circuit; the return light signal is analyzed by the data analysis module to judge the state of the open-type hollow coil sensor, and the error compensation amount is determined based on the state of the open-type hollow coil sensor; the data analysis module receives and analyzes the parameters of the digital signal, adjusts the parameters of the digital signal based on the error compensation amount, and outputs the adjusted final detection result.

[0054] Preferably, the state of the open-type hollow coil sensor is determined by analyzing the returned optical signal, including:

[0055] By analyzing the returned optical signal, it is determined whether there is an open air gap in the open-type hollow coil sensor and the size of the open air gap.

[0056] Preferably, the method further comprises: determining the size of the open air gap of the open-type hollow coil sensor by analyzing the attenuation ratio of the optical power of the correction optical signal and the return optical signal.

[0057] Preferably, the data acquisition and transmission unit transmits the digital signal to the data analysis and processing unit via an optical fiber.

[0058] Preferably, the data analysis module evaluates the state of the switch according to parameter changes of the digital signal during the process of opening and closing the switch.

[0059] The data analysis and processing unit provided by the present invention is used to realize data analysis and processing, and provide data support for staff. It mainly includes two parts: a light detection circuit and a data analysis module. The light detection circuit is used to emit correction light, which is transmitted to the optical correction circuit in the portable sensing unit through optical fiber, and receives the return light signal of the optical correction circuit, detects its power parameters, and sends the relevant parameters to the data analysis module for analysis and processing. The data analysis module first analyzes the value of the light detection circuit, determines whether there is an air gap and the size of the air gap in the open-type hollow coil sensor, and then calculates the error compensation amount. At the same time, the data analysis module analyzes the amplitude, phase and other parameters of the open-type hollow coil sensor, and takes the error compensation amount into consideration, and outputs the final result. The output information includes amplitude, phase, spectrum, waveform, etc. At the same time, the data analysis module can also evaluate whether its working state is normal according to the changes in the current parameters during the switch opening and closing process, so as to ensure the normal operation of the switch opening and closing process.

[0060] The present invention provides a portable transient current detection system for the switch opening and closing process, comprising a portable sensing unit, a data acquisition and transmission unit, a data analysis and processing unit, etc. The portable sensing unit is used to detect the complex current signal of the switch opening and closing process in real time, and convert it into a signal suitable for the data acquisition and transmission unit to collect. After the data acquisition and transmission unit collects the signal, it is transmitted to the subsequent data analysis and processing unit to perform signal component analysis, spectrum analysis, waveform display, status monitoring, etc., to ensure the normal operation of the switch opening and closing process.

[0061] A portable sensing unit includes an open hollow coil sensor and an optical correction circuit. In order to facilitate on-site live operation, the hollow coil sensor is designed to be open. However, the currently commonly used open sensors cannot determine whether the opening is tightly closed during on-site use, and cannot calculate how large the opening air gap is when it is not tightly closed. If it is impossible to determine whether the sensor has an opening and the size of the opening air gap, the accuracy of the sensor cannot be guaranteed during measurement, resulting in unreliable measurement results. In order to determine the size of the opening air gap and thus ensure the accuracy of the open sensor during on-site use, an optical correction circuit is proposed. The optical correction circuit is combined with the open hollow coil sensor, and the optical correction circuit is used to determine whether the sensor has an opening air gap, and then the size of the air gap is calculated and the error is compensated.

[0062] The open hollow coil sensor uses two semi-circular sensors, each of which is tightly wound. The winding method of the two semi-circular sensors is sequential winding and end-to-end connection. After winding, it is connected to the loop embedded in the frame. This method can effectively reduce the interference of the adjacent electromagnetic field on the sensor.

[0063] The optical correction circuit determines the size of the open air gap by the power attenuation between the output light and the input light. The optical correction circuit and the open-type hollow coil sensor form a whole, and are closed or opened at the same time. When the open-type hollow coil sensor is not closed tightly, the connection part of the optical correction circuit is misaligned, resulting in the input light not being fully transmitted back to the optical detection circuit. The size of the optical power attenuation is proportional to the size of the air gap. In this way, it is possible to determine whether there is an air gap in the open-type hollow coil sensor, and then calculate the size of the air gap, and perform error compensation on the output of the open-type hollow coil sensor to ensure the accuracy of the sensor. The input and output signals of the optical correction circuit are both optical signals, which are transmitted through optical fibers.

[0064] The data acquisition and transmission unit is used to collect the output signal of the open-type hollow coil sensor and convert it into a digital signal, and then transmit the converted signal to the data analysis and processing unit through optical fiber.

[0065] The data analysis and processing unit mainly consists of two parts: the light detection circuit and the data analysis unit. The light detection circuit is used to emit correction light, transmit it to the optical correction circuit in the portable sensing unit, receive the return light signal of the optical correction circuit, detect its power parameters, and send the relevant parameters to the data analysis module for analysis and processing. The data analysis module first analyzes the value of the light detection circuit, determines whether there is an air gap and the size of the air gap in the open-type hollow coil sensor, and then calculates the error compensation amount. At the same time, the data analysis module analyzes the amplitude, phase and other parameters of the open-type hollow coil sensor, takes the error compensation amount into consideration, and outputs the final result. At the same time, the data analysis module can also evaluate whether its working state is normal and whether it meets the test requirements according to the changes in the current parameters during the switch opening and closing process, so as to provide guarantee for the safe and stable operation of the equipment.

[0066] The present invention is a portable transient current detection system for the switch opening and closing process. A portable sensing unit is designed to achieve safe and convenient access and exit without interrupting the line on site, greatly improving the efficiency of field experiments and tests. The design of the optical correction circuit is simple and easy, and can accurately determine whether there is an open air gap in the open-type hollow coil sensor and perform error compensation, greatly improving the measurement accuracy of the open-type sensor; the data analysis and processing unit can analyze and process the output signal of the sensor in real time, extract parameters, store waveforms, and perform state analysis and prediction, etc., effectively ensuring the safe and reliable operation of the switch.

[0067] The present invention provides a portable transient current detection system for the switch opening and closing process, including a portable sensing unit, a data acquisition and transmission unit, a data analysis and processing unit and other parts. The portable sensing unit is used to sense the complex current signal of the switch opening and closing process, and transmit it to the data acquisition and transmission unit after conversion. The data acquisition and transmission unit converts the analog signal into a digital signal, and then transmits it to the data analysis and processing unit for analysis and processing. The data analysis and processing unit realizes parameter analysis of the sensor output signal, judgment of the size of the open air gap, error compensation, parameter analysis and display, status monitoring and diagnosis, etc. The design of the portable sensing unit realizes safe and convenient access and exit without interrupting the line on site. The optical correction circuit can accurately determine whether the open air gap exists in the open-type hollow coil sensor and perform error compensation, which greatly improves the measurement accuracy of the open-type sensor. The technology of the present invention has the characteristics of easy installation and operation, wide measurement frequency band range, and high precision.

[0068] The present invention provides a portable transient current detection system for the switch opening and closing process, and the technical effects are as follows:

[0069] The portable sensing unit uses an optical correction circuit to determine whether there is an open air gap in the open-type hollow coil sensor and perform error compensation, which greatly improves the measurement accuracy of the open-type sensor.

[0070] The open-type hollow coil sensor uses two semi-ring sensors, and its winding method adopts sequential winding and end-to-end connection. Combined with the embedded loop design, it can effectively reduce the interference of the adjacent electromagnetic field on the sensor, further improving the measurement accuracy;

[0071] The optical correction circuit determines the size of the opening air gap by the power attenuation between the output light and the input light. The method is simple and easy to implement, which effectively improves the reliability of the detection system.

[0072] The data analysis and processing unit can analyze and process the output signal of the sensor, extract parameters, store waveforms, and perform state analysis and prediction in real time, effectively ensuring the safe and reliable operation of the switch.

[0073] The present invention discloses a portable transient current detection system for a switch opening and closing process, which has a wide measurement frequency band, ranging from low frequency to high frequency, and does not require line interruption during operation. The system is convenient and fast, has high measurement accuracy, and is widely used.

[0074] Figure 6 The present invention is a flow chart of a transient current detection method for a switch opening and closing process according to a preferred embodiment of the present invention.

[0075] like Figure 6 As shown, the present invention provides a transient current detection method for a switch opening and closing process, the method comprising:

[0076] Step 601: outputting a current signal generated during the switch opening and closing process through the open-type hollow coil sensor of the sensing unit, and transmitting the current signal to a data acquisition and transmission unit;

[0077] Preferably, the open-type air-core coil sensor and the optical correction loop are combined into a whole and are closed or opened at the same time.

[0078] Preferably, the open-type hollow coil sensor includes two semi-annular sensors, each of which is tightly wound; the two semi-annular sensors are wound sequentially and connected end to end.

[0079] Step 602: receiving the current signal through the data acquisition and transmission unit, converting the current signal into a digital signal, and transmitting the digital signal to the data analysis and processing unit;

[0080] Preferably, the data acquisition and transmission unit transmits the digital signal to the data analysis and processing unit via an optical fiber.

[0081] Step 603: The optical detection circuit of the data analysis and processing unit is used to emit a correction light signal, and the correction light signal is transmitted to the optical correction circuit of the sensor unit, and a return light signal emitted by the optical correction circuit is received; the return light signal is analyzed by the data analysis module of the data analysis and processing unit to determine the state of the open-type hollow coil sensor, and the error compensation amount is determined based on the state of the open-type hollow coil sensor; the data analysis module receives and analyzes the parameters of the digital signal, adjusts the parameters of the digital signal based on the error compensation amount, and outputs the adjusted final detection result.

[0082] Preferably, the state of the open-type hollow coil sensor is determined by analyzing the returned optical signal, including:

[0083] By analyzing the returned optical signal, it is determined whether there is an open air gap in the open-type hollow coil sensor and the size of the open air gap.

[0084] Preferably, the method further comprises: determining the size of the open air gap of the open-type hollow coil sensor by analyzing the attenuation ratio of the optical power of the correction optical signal and the return optical signal.

[0085] Preferably, the data analysis module evaluates the state of the switch according to parameter changes of the digital signal during the process of opening and closing the switch.

[0086] A transient current detection method for a switch opening and closing process in a preferred embodiment of the present invention corresponds to a transient current detection system for a switch opening and closing process in a preferred embodiment of the present invention, and will not be described in detail herein.

[0087] The present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program is used to execute a transient current detection method for a switch opening and closing process.

[0088] The present invention provides an electronic device, the electronic device comprising: a processor and a memory; wherein:

[0089] Memory, a memory for storing processor executable instructions;

[0090] The processor is used to read executable instructions from the memory and execute the instructions to implement a transient current detection method for a switch opening and closing process.

[0091] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes. The schemes in the embodiments of the present invention may be implemented in various computer languages, for example, object-oriented programming language Java and literal scripting language JavaScript, etc.

[0092] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0093] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0094] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0095] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0096] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0097] The invention has been described above with reference to a few embodiments. However, it is readily apparent to a person skilled in the art that other embodiments than the ones disclosed above are equally within the scope of the invention, as defined by the appended patent claims.

[0098] Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a / said / the [means, components, etc.]" are to be openly interpreted as at least one instance of the means, components, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not necessarily have to be performed in the exact order disclosed, unless explicitly stated otherwise.

Claims

1. A transient current detection system for a switch opening and closing process, the system comprising: Sensing unit, data acquisition and transmission unit, and data analysis and processing unit; The sensing unit includes an open-type air-core coil sensor and an optical correction circuit; Outputting the current signal generated during the switch opening and closing process through the open-type hollow coil sensor, and transmitting the current signal to the data acquisition and transmission unit; The data acquisition and transmission unit is used to receive the current signal, convert the current signal into a digital signal, and transmit the digital signal to the data analysis and processing unit; The data analysis and processing unit includes a light detection circuit and a data analysis module. The light detection circuit is used to emit a correction light signal, transmit the correction light signal to the optical correction circuit, and receive a return light signal emitted by the optical correction circuit; the return light signal is analyzed by the data analysis module to judge the state of the open-type hollow coil sensor, and the error compensation amount is determined based on the state of the open-type hollow coil sensor; the data analysis module receives and analyzes the parameters of the digital signal, adjusts the parameters of the digital signal based on the error compensation amount, and outputs the adjusted final detection result.

2. The system according to claim 1, wherein the open-type air-core coil sensor and the optical correction loop are combined into a whole and are closed or opened at the same time.

3. According to the system of claim 1, the open hollow coil sensor includes two semi-annular sensors, each of which is tightly wound; the two semi-annular sensors are wound in a sequential manner and connected end to end.

4. The system according to claim 1, wherein the step of analyzing the return optical signal to determine the state of the open-type air-core coil sensor comprises: By analyzing the returned optical signal, it is determined whether there is an open air gap in the open-type hollow coil sensor and the size of the open air gap.

5. The system according to claim 4, further comprising: The size of the open air gap of the open-type air-core coil sensor is determined by analyzing the attenuation ratio of the optical power of the correction optical signal and the return optical signal.

6. The system according to claim 1, wherein the data acquisition and transmission unit transmits the digital signal to the data analysis and processing unit via an optical fiber.

7. The system according to claim 1, wherein the data analysis module evaluates the state of the switch according to parameter changes of the digital signal during the process of opening and closing the switch.

8. A method for detecting transient current during a switch opening and closing process, the method comprising: Outputting the current signal generated during the switch opening and closing process through the open-type hollow coil sensor of the sensing unit, and transmitting the current signal to the data acquisition and transmission unit; The data acquisition and transmission unit is used to receive the current signal, convert the current signal into a digital signal, and transmit the digital signal to a data analysis and processing unit; The optical detection circuit of the data analysis and processing unit is used to emit a correction light signal, and transmit the correction light signal to the optical correction circuit of the sensing unit, and receive a return light signal emitted by the optical correction circuit; the data analysis module of the data analysis and processing unit analyzes the return light signal to judge the state of the open-type hollow coil sensor, and determines the error compensation amount based on the state of the open-type hollow coil sensor; the data analysis module receives and analyzes the parameters of the digital signal, adjusts the parameters of the digital signal based on the error compensation amount, and outputs the adjusted final detection result.

9. The method according to claim 8, wherein the open-type air-core coil sensor and the optical correction loop are combined into a whole and closed or opened at the same time.

10. The method according to claim 8, wherein the open hollow coil sensor comprises two semi-annular sensors, each of which is tightly wound; the two semi-annular sensors are wound sequentially and connected end to end.

11. The method according to claim 8, wherein the step of analyzing the returned optical signal to determine the state of the open-type air-core coil sensor comprises: By analyzing the returned optical signal, it is determined whether there is an open air gap in the open-type hollow coil sensor and the size of the open air gap.

12. The method according to claim 11, further comprising: The size of the open air gap of the open-type air-core coil sensor is determined by analyzing the attenuation ratio of the optical power of the correction optical signal and the return optical signal.

13. The method according to claim 8, wherein the data acquisition and transmission unit transmits the digital signal to the data analysis and processing unit via an optical fiber.

14. The method according to claim 8, wherein the data analysis module evaluates the state of the switch according to parameter changes of the digital signal during the process of opening and closing the switch.

15. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and the computer program is used to execute the method according to any one of claims 8 to 14.

16. An electronic device, characterized in that: The electronic device comprises: a processor and a memory; wherein, The memory is a memory for storing instructions executable by the processor; The processor is used to read the executable instructions from the memory and execute the instructions to implement the method according to any one of claims 8 to 14.

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