CN112731017B - Device for measuring and rectifying conduction emission items of power line - Google Patents
Device for measuring and rectifying conduction emission items of power line Download PDFInfo
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- CN112731017B CN112731017B CN202011516652.2A CN202011516652A CN112731017B CN 112731017 B CN112731017 B CN 112731017B CN 202011516652 A CN202011516652 A CN 202011516652A CN 112731017 B CN112731017 B CN 112731017B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/16—Spectrum analysis; Fourier analysis
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The invention relates to a device for measuring and rectifying a power line conducted emission project, which comprises a first LISN module, a frequency spectrograph module and a quick rectifying tool module. The first LISN module extracts conducted harassment signals on a power line of an input power supply and transmits the conducted harassment signals to the frequency spectrograph module to be displayed, so that measurement of conducted transmission items of the power line is achieved, the frequency spectrograph module is integrated into the device, the size of the device is reduced, and the device is convenient to carry. In addition, the device still includes quick rectification tool module, and quick rectification tool module includes a plurality of slots, installs the slot components and parts of different grade type and specification in the slot, through the type and the specification of changing the slot components and parts in the slot, can be when taking place the problem that exceeds standard, carries out the solution of problem very first time.
Description
Technical Field
The invention relates to the technical field of electromagnetic compatibility measurement and rectification, in particular to a device for measuring and quickly rectifying a power line conduction emission item.
Background
The power line conduction emission test is an important test item for electromagnetic compatibility index assessment. The existing power line conducted emission project test uses a test mode of an LISN plus a frequency spectrometer. This test method has two problems: 1. the two instruments are needed, so that the measuring instrument is large in size and only suitable for measuring in a fixed place; 2. and no corresponding rectification tool is provided, and effective rectification cannot be carried out if the product is measured to exceed the standard. The problem that the current power line conduction emission project test is that the measurement equipment is huge, the measurement can only be carried out in a fixed place, and an rectification tool is lacked, so that when the standard exceeding problem of the power line conduction emission project occurs, the test time and the test cost can be greatly increased, a large amount of manpower, material resources and time cost are required to be input, and the project progress is seriously influenced.
Disclosure of Invention
Based on the above problems, the present invention provides a device for measuring and rectifying the conducted emission item of a power line, which has a small size and is suitable for carrying, can be used for testing in different places, is integrated with a rapid rectifying tool module, and can solve the problem in the first time when the overproof problem occurs.
In order to achieve the purpose, the invention provides the following scheme:
an apparatus for power line conducted transmission project measurement and rectification, the apparatus comprising a first LISN module, a spectrometer module, and a fast rectification tool module; the input end of the device is connected with an input power supply, and the output end of the device is connected with a tested device;
the first LISN module is respectively connected with a first power line of the input power supply and the frequency spectrograph module; the first LISN module is used for extracting conducted harassment signals on a power line of the input power supply and transmitting the conducted harassment signals to the frequency spectrograph module;
the frequency spectrograph module is used for displaying the numerical value of the conducted harassment signal;
the quick rectification tool module is respectively connected with a second power line of the input power supply and the output end of the first LISN module; the output end of the rapid rectification tool module is the output end of the device; the quick rectification tool module comprises a plurality of slots, and slot components of different types and specifications are installed in the slots of the quick rectification tool module; the slot components of different types and specifications enable the numerical value of the conducted disturbance signal displayed by the frequency spectrograph module to be within a preset threshold value.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a device for measuring and rectifying a power line conducted emission project, which comprises a first LISN module, a frequency spectrograph module and a quick rectifying tool module. The input end of the device is connected with an input power supply, and the output end of the device is connected with the tested equipment. The first LISN module extracts conducted harassment signals on a power line of an input power supply and transmits the conducted harassment signals to the frequency spectrograph module to be displayed, so that measurement of conducted transmission items of the power line is achieved, the frequency spectrograph module is integrated into the device, the size of the device is reduced, and the device is convenient to carry. In addition, the device also comprises a rapid rectification tool module, wherein the rapid rectification tool module comprises a plurality of slots, slot components of different types and specifications are installed in the slots, and the slot components of different types and specifications enable the value of the conducted disturbance signal displayed by the frequency spectrograph module to be within a preset threshold value. The device has increased quick rectification instrument module promptly, through the type and the specification of changing the slot components and parts in the slot, can carry out the solution of problem the very first time when taking place the problem that exceeds standard, and then the device can be used in the power cord conduction transmission project on experimenting in advance, tests the product in advance, discovers and solves the problem for can once pass through when formal test, thereby save a large amount of experimental expenses.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic diagram of a testing and modifying apparatus provided in embodiment 1 of the present invention.
Fig. 2 is a schematic circuit diagram of the LISN module according to embodiment 1 of the present invention.
Fig. 3 is a schematic circuit diagram of a rapid truing tool module according to embodiment 1 of the present invention.
Fig. 4 is a schematic circuit diagram of a testing and modifying apparatus provided in embodiment 1 of the present invention.
Description of the symbols:
1-a first LISN module; 2-a second LISN module; 3-a spectrometer module; 4-a load with a preset resistance value; 5-quickly rectifying and modifying the tool module; 11-an inductance; 12-a first capacitance; 13-a second capacitance; 14-a first resistance; 15-second resistance.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a device for measuring and rectifying power line conduction emission items, which can measure and rapidly rectify power line conduction emission items of tested equipment, has small volume, is suitable for carrying, can test in different places, is integrated with a rapid rectification tool module, and can solve the problem in the first time when the standard exceeding problem occurs.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example 1:
the present embodiment is configured to provide an apparatus for measuring and modifying conducted transmission items of power lines, as shown in fig. 1 and 4, the apparatus includes a first LISN module 1, a spectrum analyzer module 3, and a fast modifying tool module 5; the input end of the device is connected with an input power supply, and the output end of the device is connected with a tested device.
The first LISN module 1 is respectively connected with a first power line of an input power supply and the frequency spectrograph module 3. The first LISN module 1 is used for extracting a conducted disturbance signal on a power line of an input power supply and transmitting the conducted disturbance signal to the frequency spectrograph module 3. The frequency spectrograph module 3 is used for displaying the numerical value of the conducted disturbance signal. And then the device that this embodiment provided is through becoming the frequency spectrograph module 3 with the frequency spectrograph to in integrating the device with frequency spectrograph module 3, not only can realize the measurement of power cord conduction transmission project, can also reduce the volume of device, portable.
The quick rectification tool module 5 is respectively connected with a second power line of the input power supply and the output end of the first LISN module 1. The output of the rapid truing tool module 5 is the output of the device. The rapid rectification tool module 5 comprises a plurality of slots, slot components of different types and specifications are installed in the slots of the rapid rectification tool module 5, the slot components of different types and specifications enable the numerical value of the conduction disturbance signal displayed by the frequency spectrograph module 3 to be within a preset threshold value, and then the problem of exceeding standards can be solved by changing the types and specifications of the slot components on the rapid rectification tool module 5, so that rapid rectification of power line conduction transmitting items is realized.
As an alternative embodiment, the apparatus further comprises a second LISN module 2. The second LISN module 2 is between the second power line of the input power and the quick truing tool module 5. The input end of the second LISN module 2 is connected with a second power line of the input power supply, and the output end of the second LISN module 2 is connected with the quick correction tool module 5. The second LISN module 2 is also connected with a load 4 with a preset resistance value, so that the input impedance of a power line of an input power supply can be kept constant, the input impedance is equal to the resistance value of the load 4 with the preset resistance value, and further, the measurement results of different sites can be consistent, and the device can be used for testing in different places. The resistance value of the load 4 of the preset resistance value may be 50 Ω.
Specifically, as shown in fig. 2, the first LISN module 1 and the second LISN module 2 have the same structure, and both can be used for isolating disturbance on a public power grid. The first LISN module 1 comprises: inductance 11, first electric capacity 12, second electric capacity 13, first resistance 14 and second resistance 15. One end of the inductor 11 is connected to the first capacitor 12, and the other end of the inductor 11 is connected to the second capacitor 13. The other end of the inductor 11 is an output end of the first LISN module 1. The other end of the first capacitor 12 is connected to the first resistor 14, and the other end of the first resistor 14 is grounded. The other end of the second capacitor 13 is connected to a second resistor 15, and the other end of the second resistor 15 is grounded. The first power line is connected between an inductor 11 of the first LISN module 1 and a first capacitor 12 of the first LISN module 1, one end of the spectrometer module 3 is connected between a second capacitor 13 of the first LISN module 1 and a second resistor 15 of the first LISN module 1, and the other end of the spectrometer module 3 is grounded.
The second LISN module 2 comprises: inductance 11, first electric capacity 12, second electric capacity 13, first resistance 14 and second resistance 15. One end of the inductor 11 is connected to the first capacitor 12, and the other end of the inductor 11 is connected to the second capacitor 13. The other end of the inductor 11 is an output end of the second LISN module 2. The other end of the first capacitor 12 is connected to the first resistor 14, and the other end of the first resistor 14 is grounded. The other end of the second capacitor 13 is connected to a second resistor 15, and the other end of the second resistor 15 is grounded. The second power line is connected between the inductance 11 of the second LISN module 2 and the first capacitance 12 of the second LISN module 2. One end of the load 4 with the preset resistance value is connected between the second capacitor 13 of the second LISN module 2 and the second resistor 15 of the second LISN module 2, and the other end of the load 4 with the preset resistance value is grounded.
For the first LISN module 1 and the second LISN module 2, the first capacitor 12 may be 8 μ F, the second capacitor 13 may be 0.25 μ F, the first resistor 14 may be 5 Ω, and the second resistor 15 may be 1k Ω.
Because the standard exceeding problem occurs in the power line conduction emission project test, the specification selected by the capacitor and the inductor in the EMI filter circuit is not appropriate, and further the rapid rectification tool module 5 is added in the embodiment, and the rapid rectification tool module 5 adopts a slot-in design, and is provided with a plurality of slots, and slot components of different types and specifications are installed in the slots, so that the standard exceeding problem can be solved by connecting the capacitors and the inductors 11 of different specifications on the basis of the original test equipment.
Specifically, as shown in fig. 3, the whole rapid rectification tool module 5 adopts a slot-in design, so that the capacitors and inductors of different specifications can be directly inserted into corresponding slots to enable the capacitors and inductors to be connected into a circuit, and the slot components include a wire plug-in, a capacitor plug-in and an inductor plug-in. During measurement, each slot is firstly plugged with a wire plug to be conducted, and if the measurement result exceeds the standard, namely the value of the conducted harassment signal displayed by the frequency spectrograph module 3 is outside the preset threshold, the capacitor plug and the inductor plug of different specifications are respectively plugged until the problem of exceeding the standard does not occur, namely the value of the conducted harassment signal displayed by the frequency spectrograph module 3 is within the preset threshold.
The specific steps of using the device are as follows:
1) The input end of the device is connected with a power supply with a corresponding amplitude value, and the output end of the device is connected with the tested equipment;
2) Inserting the wire plug-in into the slot of the rapid truing tool module 5;
3) And observing the numerical value displayed by the frequency spectrograph module 3, and if the numerical value is out of the preset threshold value, respectively replacing the lead plug-in units with the capacitor plug-in units and the inductor plug-in units of different specifications until the problem of out of standard is solved, namely, the displayed numerical value is in the preset threshold value.
In addition, the quick truing tool module 5 further includes a circuit portion. The slots of the quick truing tool module 5 are electrically connected to the circuit portion by means of slot elements mounted in the slots. The circuit part comprises a first input end, a second input end and a capacitor C y1 Capacitor C y2 Capacitor C x1 A first common mode inductor, a second common mode inductor, and a capacitor C x2 Capacitor C y3 Capacitor C y4 A first differential mode inductor, a second differential mode inductor and a capacitor C x3 Capacitor C y5 Capacitor C y6 The circuit comprises a resistor R, a first output end and a second output end.
The first input ends are respectively connected with a capacitor C y1 Capacitor C x1 And a first common mode inductance. The second input ends are respectively connected with a capacitor C y2 A second common mode inductor and a capacitor C x1 And the other end of the same. Capacitor C y1 The other end of the capacitor C is connected with a capacitor C y2 And the other end of the same.
The other end of the first common mode inductor is respectively connected with a capacitor C x2 Capacitor C y3 And a first differential mode inductance. The other end of the second common mode inductor is respectively connected with a capacitor C x2 Another terminal of (C), a capacitor C y4 And a second differential-mode inductance. Capacitor C y3 The other end of the capacitor C is connected with a capacitor C y4 And the other end of the same.
The other end of the first differential mode inductor is respectively connected with a capacitor C x3 Capacitor C y5 A resistor R and a first output terminal. The other end of the second differential-mode inductor is respectively connected with a capacitor C x3 Another terminal of the resistor R, another terminal of the capacitor C y6 And a second output terminal. Capacitor C y5 The other end of the capacitor C is connected with a capacitor C y6 And the other end of the same.
When the device is not provided with the second LISN module 2, the first input end is the output end of the first LISN module 1, and the second input end is a second power line. Or, the first input end is a second power line, and the second input end is an output end of the first LISN module 1.
When the device is provided with a second LISN module 2, the first input end is the output end of the first LISN module 1, and the second input end is the output end of the second LISN module 2. Or, the first input end is an output end of the second LISN module 2, and the second input end is an output end of the first LISN module 1.
The embodiment designs a measurement and rapid rectification device for a power line conducted transmission project, and integrates a first LISN module 1, a spectrometer module 3 and a rapid rectification tool module 5. Compared with the existing power line conduction emission project testing device, the device has the main advantages that:
1. the device becomes frequency spectrograph module 3 integrated to the device in with the frequency spectrograph, has reduced testing arrangement's volume, and portable can test in different places.
2. The quick rectification tool module 5 is added, and a slot type design is adopted, so that when the standard exceeding problem occurs, the capacitors and inductors of different specifications can be directly inserted for rectification, and the standard exceeding problem is solved.
In practical application, the device of the embodiment can be used for a pre-test of a power line transmission project, a product is tested in advance, problems are found and corrected, the problem of exceeding standards is solved, and a formal test can be passed at one time, so that a large amount of test cost is saved.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. An apparatus for power line conducted transmission item measurement and rectification, the apparatus comprising a first LISN module, a spectrometer module and a rapid rectification tool module; the input end of the device is connected with an input power supply, and the output end of the device is connected with a tested device;
the first LISN module is respectively connected with a first power line of the input power supply and the frequency spectrograph module; the first LISN module is used for extracting conducted harassment signals on a power line of the input power supply and transmitting the conducted harassment signals to the frequency spectrograph module;
the frequency spectrograph module is used for displaying the numerical value of the conducted harassment signal;
the quick rectification tool module is respectively connected with a second power line of the input power supply and the output end of the first LISN module; the output end of the rapid rectification tool module is the output end of the device; the quick rectification tool module comprises a plurality of slots, and slot components of different types and specifications are installed in the slots of the quick rectification tool module; the slot component comprises a lead plug-in, a capacitor plug-in and an inductor plug-in; the slot components of different types and specifications enable the numerical value of the conducted disturbance signal displayed by the frequency spectrograph module to be within a preset threshold value;
during measurement, each slot is firstly plugged with the wire plug-in unit to be conducted, if the measurement result exceeds the standard, namely the numerical value of the conducted harassment signal displayed by the spectrometer module is outside the preset threshold, the capacitive plug-in units and the inductive plug-in units of different specifications are respectively plugged until the problem of exceeding the standard does not occur, namely the numerical value of the conducted harassment signal displayed by the spectrometer module is within the preset threshold;
the apparatus further comprises a second LISN module; the second LISN module is positioned between a second power line of the input power supply and the quick rectification tool module; the input end of the second LISN module is connected with a second power line of the input power supply, and the output end of the second LISN module is connected with the quick rectification tool module; the second LISN module is further connected with a load with a preset resistance value, the input impedance of a power line of the input power supply is kept constant, the input impedance is made to be equal to the resistance value of the load with the preset resistance value, and therefore the measurement results of different fields are consistent.
2. The apparatus for measurement and modification of conducted emissions from power lines of claim 1, wherein said first LISN module and said second LISN module are identical in construction; the first LISN module includes: the circuit comprises an inductor, a first capacitor, a second capacitor, a first resistor and a second resistor;
one end of the inductor is connected with the first capacitor, and the other end of the inductor is connected with the second capacitor; the other end of the inductor is the output end of the first LISN module; the other end of the first capacitor is connected with the first resistor; the other end of the first resistor is grounded; the other end of the second capacitor is connected with the second resistor; the other end of the second resistor is grounded.
3. The apparatus for power line conducted transmission item measurement and modification of claim 2, wherein the first power line is connected between an inductance of the first LISN module and a first capacitance of the first LISN module; the second power line is connected between an inductance of the second LISN module and a first capacitance of the second LISN module.
4. The apparatus of claim 2, wherein one end of the spectrometer module is connected between the second capacitor of the first LISN module and the second resistor of the first LISN module, and the other end of the spectrometer module is grounded; one end of the load with the preset resistance value is connected between the second capacitor of the second LISN module and the second resistor of the second LISN module, and the other end of the load with the preset resistance value is grounded.
5. The apparatus for power line conducted transmission item measurement and rectification of claim 1, wherein the rapid rectification tool module further comprises a circuit portion; the slot of the rapid rectification tool module is electrically connected with the circuit part through a slot component plug-in mounted in the slot; the circuit part comprises a first input end, a second input end and a capacitor C y1 Capacitor C y2 Capacitor C x1 A first common mode inductor, a second common mode inductor, and a capacitor C x2 Capacitor C y3 Capacitor C y4 A first differential mode inductor, a second differential mode inductor and a capacitor C x3 Capacitor C y5 Capacitor C y6 The resistor R, the first output end and the second output end;
the first input ends are respectively connected with the capacitors C y1 The capacitor C x1 And the first common mode inductance; the second input ends are respectively connected with the capacitors C y2 The second common mode inductor and the capacitor C x1 The other end of (a); the capacitor C y1 Is connected with the capacitor C at the other end y2 The other end of (a);
the other end of the first common mode inductor is respectively connected with the capacitor C x2 The capacitor C y3 And the first differential mode inductance; the other end of the second common mode inductor is respectively connected with the capacitor C x2 Another terminal of (1), the capacitor C y4 And the second differential mode inductance; the capacitor C y3 Is connected with the capacitor C at the other end y4 The other end of (a);
the other end of the first differential mode inductor is respectively connected with the capacitor C x3 The capacitor C y5 The resistor R and the first output end; the other end of the second differential-mode inductor is respectively connected with the capacitor C x3 The other end of the resistor R, the other end of the resistor RThe capacitor C y6 And the second output; the capacitor C y5 Is connected with the capacitor C at the other end y6 And the other end of the same.
6. The apparatus for power line conducted transmission item measurement and modification of claim 5, wherein the first input is an output of the first LISN module; the second input end is the second power line;
or, the first input end is the second power line; the second input end is the output end of the first LISN module;
or, the first input end is an output end of the first LISN module; the second input end is the output end of the second LISN module;
or the first input end is an output end of the second LISN module; the second input end is an output end of the first LISN module.
7. An apparatus for power line conducted emissions measurement and modification, as claimed in claim 2, wherein said first capacitance is 8 μ F and said second capacitance is 0.25 μ F; the first resistance is 5 Ω, and the second resistance is 1k Ω.
8. The apparatus for measurement and modification of conducted emissions of power lines according to claim 1, wherein said pre-set resistive load has a resistance of 50 Ω.
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| CN113945786B (en) * | 2021-10-11 | 2024-06-04 | 海检检测有限公司 | Automatic conduction disturbance parameter optimizing device and optimizing method thereof |
| CN114325159A (en) * | 2021-11-23 | 2022-04-12 | 北京无线电计量测试研究所 | Power line conduction emission item standard exceeding noise diagnosis and rectification device |
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