CN116699231A - System and method for sensing broadband current in switch electromagnetic disturbance - Google Patents
System and method for sensing broadband current in switch electromagnetic disturbance Download PDFInfo
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- CN116699231A CN116699231A CN202211732118.4A CN202211732118A CN116699231A CN 116699231 A CN116699231 A CN 116699231A CN 202211732118 A CN202211732118 A CN 202211732118A CN 116699231 A CN116699231 A CN 116699231A
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- 239000004020 conductor Substances 0.000 claims description 17
- 238000005070 sampling Methods 0.000 claims description 12
- 238000007781 pre-processing Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 2
- 238000004804 winding Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 8
- 238000004590 computer program Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 5
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
- G01R15/181—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using coils without a magnetic core, e.g. Rogowski coils
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
- G01R15/205—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices using magneto-resistance devices, e.g. field plates
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Abstract
The invention discloses a system and a method for sensing broadband current in switch electromagnetic disturbance, and belongs to the technical field of power system automation. The system of the invention comprises: the broadband current sensor module and the signal acquisition processing module; the broadband current sensor module is used for measuring broadband current signals in the opening and closing process of the switch equipment, transmitting the measured broadband current signals to the signal acquisition processing module through the shielding cable, and the signal acquisition processing module is used for taking the broadband current signals as analog quantity signals or converting the broadband current signals into digital quantity signals and transmitting the analog quantity signals or the digital quantity signals to the external equipment through the shielding cable. The broadband current sensor module and the signal acquisition processing module are used for measuring and acquiring the broadband current signal, so that the broadband current signal is sensed, the accuracy is high, and the anti-interference capability is high.
Description
Technical Field
The invention relates to the technical field of power system automation, in particular to a system and a method for broadband current sensing in switch electromagnetic disturbance.
Background
The switch equipment in the power system comprises a disconnecting switch, a circuit breaker and other equipment, and when the switch equipment is operated or acts, the operation process cannot be completed instantaneously, so that the phenomenon of re-burning and extinguishing of multiple electric arcs can be generated in the opening and closing operation process. Particularly, in the opening and closing process of the isolating switch, current with wide frequency and high amplitude and magnetic field signals are generated, the generated signals have wide frequency range (from direct current to pulse), short duration and large amplitude, and the electric power equipment connected with the isolating switch in the circuit is greatly influenced, so that equipment misoperation, abnormal output signals, equipment restarting and the like can be possibly caused, and the whole system is possibly caused to be faulty in severe cases. Therefore, the electromagnetic interference problem in the operation process of the switch equipment is analyzed and researched, and the electromagnetic compatibility of the power equipment is very necessary to be improved. To accurately analyze the electromagnetic interference problem of the switch equipment, accurate monitoring of the broadband current and magnetic field signals in the operation process is required.
Current monitoring is generally achieved by adopting a current sensor or a current transformer in the current power system, and the corresponding magnetic field can be further calculated according to the relation between the current and the magnetic field, and vice versa. However, the current sensor has narrow measuring frequency band and small dynamic range, and needs to measure current signals with wide frequency and high amplitude, so that the current sensor has large volume and is inconvenient to be applied on site. Although expert students research on the optical current sensor, and prove that the optical current sensor has the measurement advantages of wide dynamic range and wide frequency, the optical sensor is easily influenced by factors such as temperature and the like, and has poor stability in practical application. Therefore, it is necessary to study a high-performance broadband current sensing method.
Disclosure of Invention
In view of the above problems, the present invention provides a system for sensing broadband current in switch-type electromagnetic disturbance, including: the broadband current sensor module and the signal acquisition processing module;
the broadband current sensor module is used for measuring broadband current signals in the opening and closing process of the switch equipment, transmitting the measured broadband current signals to the signal acquisition processing module through the shielding cable, and the signal acquisition processing module is used for taking the broadband current signals as analog quantity signals or converting the broadband current signals into digital quantity signals and transmitting the analog quantity signals or the digital quantity signals to the external equipment through the shielding cable.
Optionally, the broadband current sensor module includes: a magneto-resistive sensor and an air-core sensor for measuring a broadband current signal, respectively.
Alternatively, the magneto-resistive sensor is a GMR sensor and comprises at least 4.
Optionally, the magnetic resistance sensor is symmetrically installed on the PCB board, and an output of the magnetic resistance sensor is connected with a wire hole of the PCB board.
Optionally, the air core coil sensor is printed on the PCB board, the air core coil of idle coil sensor is in the wire winding on the front and the back on the PCB board, through the via hole connection of PCB board, the output of air core coil sensor is connected the wiring hole of PCB board.
Optionally, the thickness of the PCB is 1.6 mm-3 mm.
Optionally, the system further comprises: the intelligent module is used for preprocessing the digital quantity signal or the analog quantity signal to determine the measurement error of the broadband current sensor module and compensating the measurement error.
Optionally, the intelligent module performs preprocessing, including: comparing the broadband current signal measured by the air coil sensor with the broadband current signal measured by the magnetic resistance sensor to determine whether the magnetic resistance sensor is affected by the position of the primary conductor, if so, determining the measurement error of the magnetic resistance sensor caused by the change of the position of the primary conductor according to the difference between the broadband current signal measured by the air coil sensor and the broadband current signal measured by the magnetic resistance sensor.
Optionally, the signal acquisition processing module determines the sampling frequency of the broadband current signal according to the nyquist sampling theorem, and the sampling frequency is greater than twice the highest frequency component of the broadband current signal.
In still another aspect, the present invention further provides a method for sensing broadband current in switch electromagnetic disturbance, including:
measuring a broadband current signal in the opening and closing process of the switch equipment through a broadband current sensor module;
transmitting the measured broadband current signal to the signal acquisition processing module through a shielding cable;
and the broadband current signal is used as an analog quantity signal or converted into a digital quantity signal through a signal acquisition and processing module, and the analog quantity signal or the digital quantity signal is transmitted to external equipment through a shielded cable.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a system for sensing broadband current in switch electromagnetic disturbance, which comprises: the broadband current sensor module and the signal acquisition processing module; the broadband current sensor module is used for measuring broadband current signals in the opening and closing process of the switch equipment, transmitting the measured broadband current signals to the signal acquisition processing module through the shielding cable, and the signal acquisition processing module is used for taking the broadband current signals as analog quantity signals or converting the broadband current signals into digital quantity signals and transmitting the analog quantity signals or the digital quantity signals to the external equipment through the shielding cable. The broadband current sensor module and the signal acquisition processing module are used for measuring and acquiring the broadband current signal, so that the broadband current signal is sensed, the accuracy is high, and the anti-interference capability is high.
Drawings
FIG. 1 is a block diagram of a system of the present invention;
FIG. 2 is a block diagram of a wideband current sensor module of the system of the present invention;
FIG. 3 is a flow chart of the method of the present invention;
wherein, 1 is a broadband current sensor module, 2 is a signal acquisition processing module, 3 is an intelligent module, 4 is a magnetic resistance sensor, 5 is an air core coil sensor, 6 is a PCB board, 7 is a wiring hole, 8 is a via hole, 9 is a loop, and 10 is a wire outlet hole.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the examples described herein, which are provided to fully and completely disclose the present invention and fully convey the scope of the invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, like elements/components are referred to by like reference numerals.
Unless otherwise indicated, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. In addition, it will be understood that terms defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Example 1:
the invention provides a system for sensing broadband current in switch electromagnetic disturbance, as shown in figure 1, comprising: a broadband current sensor module 1 and a signal acquisition processing module 2;
the broadband current sensor module 1 is configured to measure a broadband current signal in an opening and closing process of a switch device, and transmit the measured broadband current signal to the signal acquisition processing module 2 through a shielded cable, where the signal acquisition processing module 2 is configured to use the broadband current signal as an analog signal, or convert the broadband current signal into a digital signal, and transmit the analog signal or the digital signal to an external device through the shielded cable.
Wherein, broadband current sensor module 1 includes: a magneto-resistive sensor 4 and an air-core coil sensor 5, the magneto-resistive sensor 4 and the air-core coil sensor 5 being respectively for measuring a broadband current signal.
The magneto-resistive sensor 4 is a GMR sensor and comprises at least 4.
The magneto-resistive sensor 4 is symmetrically arranged on the PCB 6, and the output of the magneto-resistive sensor 4 is connected with the wire outlet 7 of the PCB.
The air coil sensor 5 is printed on the PCB 7, the air coil of the air coil sensor 5 is wound on the front surface and the back surface of the PCB 7 and is connected with the air coil through a through hole 9 of the PCB 7, and the output of the air coil sensor 5 is connected with a wiring hole 10 of the PCB.
Wherein the thickness of the PCB 7 is 1.6 mm-3 mm.
Wherein, the system still includes: the intelligent module 3 is configured to preprocess the digital or analog signal to determine a measurement error of the broadband current sensor module 1, and compensate the measurement error.
Wherein, intelligent module 3 carries out the preliminary treatment, includes: comparing the broadband current signal measured by the air core coil sensor 5 with the broadband current signal measured by the magneto-resistance sensor 4 to determine whether the magneto-resistance sensor 4 is affected by the primary conductor position, if so, determining the measurement error of the magneto-resistance sensor 4 caused by the variation of the primary conductor position according to the difference between the broadband current signal measured by the air core coil sensor 5 and the broadband current signal measured by the magneto-resistance sensor 4.
The signal acquisition processing module 2 determines the sampling frequency of the broadband current signal according to the nyquist sampling theorem, and the sampling frequency is greater than twice the highest frequency component of the broadband current signal.
The invention is further illustrated by the following examples:
as shown in fig. 1, the system of the present invention comprises:
the intelligent current sensor comprises three parts, namely a broadband current sensor module 1, a signal acquisition processing module 2 and an intelligent module 3.
The broadband current sensor module 1 is used for sensing broadband current signals in the opening and closing process of the switch equipment and transmitting the broadband current signals to the signal acquisition and processing module through the shielded cable. The signal acquisition processing module 2 converts the output analog quantity signal of the broadband current sensor into digital quantity, and transmits the digital quantity signal to the following intelligent module 3 through an optical fiber.
The signal acquisition processing module 2 is also provided with an analog output interface, and after the signals of the sensor are conditioned, the signals are transmitted to other equipment needing analog signals through a shielded cable.
The signal acquisition processing module 2 is used for acquiring, processing and transmitting the output signal of the broadband current sensor, the sampling frequency is determined according to the nyquist sampling theorem, the sampling frequency is required to be greater than twice the highest frequency component of the detected signal, and the sampling frequency can be set according to actual requirements.
The intelligent module 3 is used for receiving signals of the signal acquisition processing module, analyzing and processing signals of the broadband current sensor, analyzing and comparing the output of the air coil with the output of the magnetic resistance sensor, judging whether the magnetic resistance sensor is affected by the primary conductor position or not, analyzing and calculating the primary conductor position variation and the influence of the primary conductor position variation on the magnetic resistance sensor measurement error according to the difference between the output signals of the two sensors, compensating the error caused by the position influence, and improving the measurement performance of the whole broadband current sensor.
As shown in fig. 2, the broadband current sensor module 1 includes two sensors, namely a magnetoresistive sensor 4 and an air coil 5. The magnetoresistive sensor 4 is formed by using a GMR sensor, and has advantages of wide measurement frequency band and high sensitivity, and the measurement frequency band can be up to MHz from direct current, but is not enough to be sensitive to position, so that the magnetoresistive sensor is easily affected by factors such as the position of a primary conductor (primary conductor eccentricity and deflection angle) when being used on site. The hollow coil has a measuring frequency band which is not as wide as that of the GMR sensor and cannot measure a direct current signal, but has a measuring frequency band which can be from several Hz to hundreds kHz. The air-core coil manufactured by adopting the printed circuit board technology has uniformly and symmetrically distributed windings, so that the air-core coil is not easily influenced by factors such as the position of a primary conductor. Based on the above, the magnetic resistance sensor is used for measuring direct current to high frequency current signals, and the air coil is used as a comparison sensor to realize the correction of the output signals of the magnetic resistance sensor, so that the position interference resistance of the magnetic resistance sensor is improved. The output signals of the two sensors are comprehensively analyzed and processed to form the DC-AC-high frequency signal sensor capable of realizing the self-correction of the performance.
The magneto-resistive sensor 4 and the air coil 5 are distributed on the same PCB board 6. The PCB board serves as both the mounting circuit board for the magnetoresistive sensor 4 and the bobbin for the air-core coil 5. During actual manufacturing, the air-core coil, the corresponding through holes, the mounting holes, the connecting wires and the like can be manufactured through the printed circuit board technology, and then the magneto-resistance sensor is welded on the corresponding mounting holes. The thickness of the PCB is generally between 1.6mm and 3mm, the thickness can be adjusted according to the requirement, and the inner radius and the outer radius of the PCB can be adjusted according to the radius of the measured conductor and the installation space.
The 4 GMR (giant magneto resistance) sensors in the magnetic resistance sensor are symmetrically arranged on the PCB, and the 4 GMR sensors are symmetrically distributed, so that the anti-interference capability of the magnetic resistance sensor is effectively improved. The output of the magneto-resistive sensor is connected to a wiring hole 7 on the PCB and then transmitted to the signal acquisition and processing module 2 through a shielded cable. The shielded cables may be soldered directly to the corresponding wire connection holes. The relation between the output voltage of the GMR sensor and the measured current is as follows:
U GMR ＝k 1 I+c 1
wherein: k (k) 1 C is the transformation coefficient of the output voltage to the current of the GMR sensor 1 Is constant, U GMR For measuring the output voltage of the GMR sensor when measuring the current, I is the measured current.
When the measured signal is a magnetic field, the relation between the output voltage and the magnetic induction intensity of the GMR sensor is as follows:
U GMR2 ＝k 2 B+c 2
wherein: k (k) 2 C is the transformation coefficient of the output voltage of the GMR sensor to the magnetic induction intensity 2 Is constant, U GMR2 For measuring the output voltage of the GMR sensor when the magnetic field is measured, B is the magnetic induction intensity of the measured magnetic field.
The air core coil 5 is directly printed on the PCB 6 by adopting a printed circuit board technology, and the PCB 6 is used as a winding framework. The winding passes through the through holes 8 and is uniformly wound on the PCB framework. The solid lines of the broken lines in fig. 2 indicate the windings on the front side of the PCB board, and the broken lines indicate the windings on the back side of the PCB board. The front and back windings are connected by vias 8. And 9 is a loop of the air coil, and the loop formed by the loop is opposite to the loop formed by winding of the air coil, so that the interference of magnetic field components in the direction perpendicular to the plane of the air coil can be effectively eliminated. The number of turns of the air coil winding is generally adjustable according to the size of the current to be measured and the size of the PCB. Taking a certain PCB as an example, the inner radius of the air coils distributed on the PCB is 50mm, the outer radius is 90mm, the thickness of the PCB is 3mm, and considering the minimum interval and the size between the centers of the through holes, the maximum number of turns of the air coils on one PCB can be 104 turns and can be smaller than the value according to the calculation of 3mm. If the measured current is smaller, the mode of accumulating the multi-layer PCB can be adopted, and the output signal size of the multi-layer PCB is improved. The output of the air coil is connected to the wiring hole 10 and then to the subsequent signal acquisition processing module 2 through a shielded cable.
The invention designs the air coil and the loop thereof by utilizing the printed circuit board technology, ensures that the measurement performance of the air coil is not easily influenced by the position of the primary conductor, then uses the advantage as a comparison sensor to compare and correct the output signal of the magnetic resistance sensor, and improves the anti-interference performance of the magnetic resistance sensor. And then the expansibility of the measuring frequency band of the magnetic resistance sensor is utilized to realize the high-performance sensing and measurement of the full measuring frequency band range. According to the invention, through the symmetrical distribution of the magnetic resistance sensor and the further correction of the air coil, the measurement performance and the anti-interference capability of the broadband current sensor are greatly improved.
Example 2:
the invention also provides a method for sensing broadband current in switch electromagnetic disturbance, which is shown in figure 3 and comprises the following steps:
step 1, measuring a broadband current signal in the opening and closing process of switch equipment through a broadband current sensor module;
step 2, transmitting the measured broadband current signal to the signal acquisition processing module through a shielded cable;
and step 3, using the broadband current signal as an analog quantity signal or converting the broadband current signal into a digital quantity signal through a signal acquisition and processing module, and transmitting the analog quantity signal or the digital quantity signal to external equipment through a shielded cable.
The invention has the following benefits that:
1) The broadband current sensing module adopts two sensors, and the two sensors are mutually compared to analyze the output difference of the two sensors, calculate the corresponding primary conductor position variation and the error generated by the primary conductor position variation and compensate the primary conductor position variation, so that the self-correction of the measurement performance is realized, the broadband current sensor with the performance self-correction function is constructed, and the measurement accuracy and the anti-interference capability of the sensor are greatly improved.
2) The magnetic resistance sensor adopts the GMR sensor with excellent performance, has high measurement frequency bandwidth and high sensitivity, can effectively measure broadband, high-amplitude current and magnetic field signals in the operation process of the switch equipment, realizes accurate monitoring of the operation process state of the switch equipment, symmetrically distributes the 4 GMR sensors, and effectively improves the anti-interference capability of the magnetic resistance sensor.
3) The air core coil is directly printed on the PCB by adopting the printed circuit board technology instead of the traditional manual winding mode, so that the uniformity of winding of each turn is effectively ensured, the uniform and symmetrical distribution of winding of the whole coil is ensured, the anti-interference capability of the air core coil is improved, and the anti-vertical component magnetic field interference capability of the air core coil is further improved by directly printing a loop on the PCB.
4) The magnetic resistance sensor and the air coil share one PCB, so that the space is effectively saved, the volume and weight of the sensor are reduced, serial accumulation of the multi-layer PCBs can be performed according to the measurement requirement, the output size of the sensor is improved, and further accurate measurement of weak signals is realized.
5) The invention has the advantages of wide measuring frequency band, capability of measuring direct current to MHz level current and magnetic field signals, small volume, light weight and wide application, and can measure dynamic range from milliamp level current to kiloamp level current.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein. The scheme in the embodiment of the invention can be realized by adopting various computer languages, such as object-oriented programming language Java, an transliteration script language JavaScript and the like.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. A system for broadband current sensing in a switching type electromagnetic disturbance, the system comprising: the broadband current sensor module and the signal acquisition processing module;
the broadband current sensor module is used for measuring broadband current signals in the opening and closing process of the switch equipment, transmitting the measured broadband current signals to the signal acquisition processing module through the shielding cable, and the signal acquisition processing module is used for taking the broadband current signals as analog quantity signals or converting the broadband current signals into digital quantity signals and transmitting the analog quantity signals or the digital quantity signals to the external equipment through the shielding cable.
2. The system of claim 1, wherein the broadband current sensor module comprises: a magneto-resistive sensor and an air-core sensor for measuring a broadband current signal, respectively.
3. The system of claim 2, wherein the magnetoresistive sensor is a GMR sensor and comprises at least 4.
4. The broadband current sensing system according to claim 2, wherein the magneto-resistive sensors are symmetrically mounted on a PCB, and an output of the magneto-resistive sensors is connected to a wire hole of the PCB.
5. The system of claim 2, wherein the air coil sensor is printed on a PCB board, the air coil of the air coil sensor is wound on the front and back sides of the PCB board, and is connected through a via hole of the PCB board, and an output of the air coil sensor is connected to a wiring hole of the PCB board.
6. The system of claim 5, wherein the PCB has a thickness of 1.6mm to 3mm.
7. The system of claim 1, wherein the system further comprises: the intelligent module is used for preprocessing the digital quantity signal or the analog quantity signal to determine the measurement error of the broadband current sensor module and compensating the measurement error.
8. The system of claim 7, wherein the intelligent module performs preprocessing comprising: comparing the broadband current signal measured by the air coil sensor with the broadband current signal measured by the magnetic resistance sensor to determine whether the magnetic resistance sensor is affected by the position of the primary conductor, if so, determining the measurement error of the magnetic resistance sensor caused by the change of the position of the primary conductor according to the difference between the broadband current signal measured by the air coil sensor and the broadband current signal measured by the magnetic resistance sensor.
9. The system of claim 1, wherein the signal acquisition processing module samples the wideband current signal at a frequency determined according to the nyquist sampling theorem and wherein the sampling frequency is greater than twice the highest frequency component of the wideband current signal.
10. A method for broadband current sensing in a switched electromagnetic disturbance using a system according to any one of claims 1 to 9, the method comprising:
measuring a broadband current signal in the opening and closing process of the switch equipment through a broadband current sensor module;
transmitting the measured broadband current signal to the signal acquisition processing module through a shielding cable;
and the broadband current signal is used as an analog quantity signal or converted into a digital quantity signal through a signal acquisition and processing module, and the analog quantity signal or the digital quantity signal is transmitted to external equipment through a shielded cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211732118.4A CN116699231A (en) | 2022-12-30 | 2022-12-30 | System and method for sensing broadband current in switch electromagnetic disturbance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211732118.4A CN116699231A (en) | 2022-12-30 | 2022-12-30 | System and method for sensing broadband current in switch electromagnetic disturbance |
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| Publication Number | Publication Date |
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| CN116699231A true CN116699231A (en) | 2023-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211732118.4A Pending CN116699231A (en) | 2022-12-30 | 2022-12-30 | System and method for sensing broadband current in switch electromagnetic disturbance |
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| CN (1) | CN116699231A (en) |
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- 2022-12-30 CN CN202211732118.4A patent/CN116699231A/en active Pending
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