CN110716166A - Method for verifying electromagnetic compatibility test result of electrical secondary equipment - Google Patents
Method for verifying electromagnetic compatibility test result of electrical secondary equipment Download PDFInfo
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- CN110716166A CN110716166A CN201910956973.5A CN201910956973A CN110716166A CN 110716166 A CN110716166 A CN 110716166A CN 201910956973 A CN201910956973 A CN 201910956973A CN 110716166 A CN110716166 A CN 110716166A
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- 238000012795 verification Methods 0.000 abstract description 11
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- 230000036039 immunity Effects 0.000 description 7
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
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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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Abstract
The invention relates to a method for verifying an electromagnetic compatibility test result of electrical secondary equipment, which comprises the following steps: connecting an interference signal generator and a tested object with a reference ground plane, placing the tested object on an insulating support, connecting an output line of the interference signal generator to a tested loop of the tested object, connecting a test end of a high-voltage differential probe to the tested loop, and connecting an oscilloscope with the high-voltage differential probe; in the electromagnetic compatibility test, relevant parameters of a tested loop of a tested object are acquired through a high-voltage differential probe, and the spatial distribution condition of an interference signal in the tested object is observed through an oscilloscope, so that whether the tested object has the condition that the function or the performance is temporarily lost or reduced or not is judged. The invention can improve the test level of the electrical secondary equipment and reduce the loss of the conventional verification equipment.
Description
Technical Field
The invention belongs to the technical field of power systems, and particularly relates to a method for verifying electromagnetic compatibility test results of electrical secondary equipment.
Background
The force system is composed of a plurality of devices of different grades, the devices need to operate simultaneously to support the whole system to play the required functions, and one of the most critical components of the electric secondary device plays an important role. In a power plant or a transformer substation, the electromagnetic environment of electrical secondary equipment is complex, the phenomenon of electromagnetic interference is rare, the equipment is interfered by the outside, the interference condition can also occur inside the equipment, and if effective measures cannot be taken timely, the interference is difficult to avoid. Therefore, in the design and development stage of the equipment, the problem of electromagnetic compatibility should be emphasized, and after the equipment is finalized, an electromagnetic compatibility test should be performed by a third party organization to determine that the equipment has sufficient anti-interference capability.
According to the requirements of GB/T17626 related standards, the evaluation of electromagnetic compatibility test results is divided into four types:
A) normal performance within regulatory limits;
B) temporary loss or reduction of function or performance, but self-recovery after disturbance cessation, without operator intervention;
C) temporary loss or reduction of function or performance, but recovery requires operator intervention;
D) unrecoverable loss of function or reduced performance may result from device hardware or software corruption, or data loss.
In the electromagnetic compatibility test, interference signals applied in the test have certain destructiveness to equipment (including electrical secondary equipment and related verification equipment), and the conventional verification equipment is generally a precision instrument and can bear interference signals with a grade far lower than that of the electrical secondary equipment, so that the conventional verification equipment is difficult to monitor the test process in the test process. Generally, the state of a test article (EUT) during the test can only be observed visually; or recording the data of the tested object before and after the test, and checking whether the tested object has problems in the test by a comparison method. According to the requirements of the relevant standard of GB/T17626, in the result evaluation, if the phenomenon that the function or the performance of the tested object is temporarily lost or reduced in the test process cannot be detected, and the tested object can recover by itself after the disturbance stops, and meanwhile, the operator does not need to intervene. When this occurs, it is impossible to determine whether or not the test article is acceptable. Therefore, when the electromagnetic compatibility test is performed, the whole process of the tested object needs to be monitored, and whether the tested object can pass the test or not is comprehensively evaluated.
Disclosure of Invention
The invention aims to provide a method for verifying an electromagnetic compatibility test result of electrical secondary equipment.
The invention provides a method for verifying an electromagnetic compatibility test result of electrical secondary equipment, which comprises the following steps:
connecting an interference signal generator and a tested object with a reference ground plane, placing the tested object on an insulating support, connecting an output line of the interference signal generator to a tested loop of the tested object, connecting a test end of a high-voltage differential probe to the tested loop, and connecting an oscilloscope with the high-voltage differential probe;
in the electromagnetic compatibility test, relevant parameters of a tested loop of a tested object are acquired through a high-voltage differential probe, and the spatial distribution condition of an interference signal in the tested object is observed through an oscilloscope, so that whether the tested object has the condition that the function or the performance is temporarily lost or reduced or not is judged.
Further, the tested loop comprises any one of a power supply loop, a switching value input loop, a switching value output loop, an alternating voltage input loop and an alternating current input loop.
Further, the interference signal generator comprises any one of an electrostatic discharge test generator, a surge signal generator, an electric fast transient pulse group test generator and an oscillation wave test generator.
By means of the scheme, the test level of the electrical secondary equipment can be improved and the loss of conventional verification equipment can be reduced by the method for verifying the electromagnetic compatibility test result of the electrical secondary equipment.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of an EMI immunity test;
fig. 2 is a graph of an open circuit voltage waveform of a surge generator in an embodiment of the invention;
fig. 3 is a schematic diagram of a surge test in an embodiment of the invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The embodiment provides a method for verifying an electromagnetic compatibility test result of electrical secondary equipment, which comprises the following steps:
connecting an interference signal generator and a tested object with a reference ground plane, placing the tested object on an insulating support, connecting an output line of the interference signal generator to a tested loop of the tested object, connecting a test end of a high-voltage differential probe to the tested loop, and connecting an oscilloscope with the high-voltage differential probe;
in the electromagnetic compatibility test, relevant parameters of a tested loop of a tested object are acquired through a high-voltage differential probe, and the spatial distribution condition of an interference signal in the tested object is observed through an oscilloscope, so that whether the tested object has the condition that the function or the performance is temporarily lost or reduced or not is judged.
The method for verifying the electromagnetic compatibility test result of the electrical secondary equipment has the following technical effects:
1) improving the test level of electrical secondary equipment
The scheme improves the verification method of the electrical secondary equipment during the electromagnetic compatibility test, monitors through a more precise oscilloscope, and can analyze the spatial distribution of interference signals in the EUT on the basis of the traditional verification method to judge whether the interference signals can interfere other equipment in actual operation, thereby improving the accuracy of the test result.
2) Reducing loss of conventional authentication devices
The scheme effectively replaces conventional verification equipment, reduces the damage of the verification equipment in the test process, and greatly saves the test cost.
The present invention is described in further detail below.
Electromagnetic compatibility (EMC) refers to the ability of a device or system to perform satisfactorily in its electromagnetic environment and not to generate intolerable electromagnetic interference to any device in its environment. Therefore, EMC includes two aspects (EMS and EMI) requirements: the EMI refers to that the electromagnetic interference generated by the equipment to the environment in the normal operation process cannot exceed a certain limit value; EMS refers to an appliance that has a degree of immunity to electromagnetic interference present in the environment, i.e., electromagnetic susceptibility.
The EMI test included: conductive emission tests, radiative emission tests, and the like.
The EMS test comprises the following steps: electrostatic discharge immunity test, surge (impact) immunity test, electric fast transient pulse group immunity test, oscillation wave immunity test and the like.
The invention is only suitable for testing EMS properties, and the test principle is shown in figure 1.
The interference signal generator 1 and a tested object 2(EUT) are both connected with a reference ground plane 3, the EUT is placed on an insulating support 4 with the height of 10cm, and an output line of the interference signal generator 1 is connected to a tested loop of the EUT for testing. Among them, the tested loop of the electrical secondary device is generally: a power supply circuit, a switching value input circuit, a switching value output circuit, an alternating voltage input circuit, an alternating current input circuit and the like; the interference signal generator 1 is typically: an electrostatic discharge test generator, a surge signal generator, an electric fast transient pulse group test generator, an oscillation wave test generator and the like.
Because the interference signals of the test items are high-voltage (maximum 4kV) and high-frequency (1 kHz-1 MHz) signals, the EUT has strong destructiveness in the test process. The inspection equipment of the electrical secondary equipment is a high-precision instrument, and if the inspection equipment is used in an electromagnetic compatibility test, the inspection equipment has the risk of being damaged by interference signals and can also influence the measurement accuracy of the instrument. Therefore, other methods should be selected to test the performance of the tested object in the electromagnetic compatibility test.
Aiming at the current situation that the test result of conventional equipment cannot be verified after interference is applied to the EUT in the electromagnetic compatibility test of electrical secondary equipment, the invention monitors the EUT in a mode of an oscilloscope and a high-voltage differential probe, and achieves the aim of accurately testing the EUT.
In the embodiment, a surge test is taken as an example, the test standards are GB/T17626.5-2008 electromagnetic compatibility test and measurement technology surge (impact) immunity test, the test level is 4 grade, the test common mode voltage is 4kV, and the test differential mode voltage is 2 kV. The waveform of the interference signal is shown in FIG. 2 (1.2/50. mu.s). In the figure, wavefront time: t is11.67 × T ═ 1.2 × (1 ± 30%) μ s; half peak time: t is2＝50×(1±20％)μs。
The selected test instruments comprise: the oscilloscope is Agilent 3034T, the bandwidth is 350MHz, and the sampling rate is 5 GSa/s; the high-voltage differential probe selects the specially-tested MD200A, and the differential mode input voltage: 7000V peak, common mode input voltage: 7000V peak. The experimental wiring is shown in figure 3.
In fig. 3, the output positive and negative electrode test lines of the signal generator 1 are connected to the power supply circuit of the tested article 2(EUT), after the high-voltage differential probe 5 is connected with the oscilloscope 6, the test ends of the high-voltage differential probe 5 are respectively connected to the EUT circuit to be monitored (fig. 3 is the power supply circuit, and the others can be connected to the switching value input circuit, the switching value output circuit, and the like), and the spatial distribution of the interference signals in the EUT and the variation conditions of the input and output are observed through the oscilloscope.
The method can be used for detecting the performance change condition of the EUT when the interference signal is applied, effectively solves the problem that the EUT cannot be detected in the test process, and improves the accuracy of the test result.
The invention firstly uses the high-voltage differential probe and the oscilloscope to verify the test result in the electromagnetic compatibility test of the electrical secondary equipment. The application of the method enables the tested object to be monitored in the whole process of the test process, replaces the traditional verification method, not only does not reduce the accuracy of the test, but also effectively improves the verification level of the test, and greatly improves the accuracy of the test result.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (3)
1. A method for verifying electromagnetic compatibility test results of electrical secondary equipment is characterized by comprising the following steps:
connecting an interference signal generator and a tested object with a reference ground plane, placing the tested object on an insulating support, connecting an output line of the interference signal generator to a tested loop of the tested object, connecting a test end of a high-voltage differential probe to the tested loop, and connecting an oscilloscope with the high-voltage differential probe;
in the electromagnetic compatibility test, relevant parameters of a tested loop of a tested object are acquired through a high-voltage differential probe, and the spatial distribution condition of an interference signal in the tested object is observed through an oscilloscope, so that whether the tested object has the condition that the function or the performance is temporarily lost or reduced or not is judged.
2. The method for verifying the electromagnetic compatibility test result of the electrical secondary equipment according to claim 1, wherein the tested loop comprises any one of a power supply loop, a switching value input loop, a switching value output loop, an alternating voltage input loop and an alternating current input loop.
3. The method for verifying the result of the electromagnetic compatibility test of the electrical secondary equipment as claimed in claim 2, wherein the interference signal generator comprises any one of an electrostatic discharge test generator, a surge signal generator, an electrical fast transient burst test generator, and an oscillatory wave test generator.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111458589A (en) * | 2020-04-20 | 2020-07-28 | 西安中科长青医疗科技研究院有限公司 | Electromagnetic compatibility design verification method |
| CN112630722A (en) * | 2021-01-04 | 2021-04-09 | 国网重庆市电力公司营销服务中心 | Electromagnetic anti-interference test signal monitoring device and monitoring system for electric energy meter |
| CN112666408A (en) * | 2021-03-09 | 2021-04-16 | 中国电力科学研究院有限公司 | Method and system for detecting electromagnetic compatibility of submodule controller |
| CN113219287A (en) * | 2021-05-21 | 2021-08-06 | 山东电工电气集团有限公司 | Method for carrying out capacitance compatibility rating and weak link positioning on state net core FTU |
| CN117434372A (en) * | 2023-12-21 | 2024-01-23 | 深圳信测标准技术服务股份有限公司 | Electromagnetic compatibility immunity test method and system for electronic product |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914713A (en) * | 2012-10-23 | 2013-02-06 | 上海市电力公司 | Electromagnetic compatibility test method and device for electric power online monitoring equipment |
| CN106199113A (en) * | 2016-08-29 | 2016-12-07 | 山东大学（威海） | A kind of active High Pressure Difference sub-probe device |
| US20170012425A1 (en) * | 2014-02-05 | 2017-01-12 | Cirprotec, S.L. | Combined device for electrical protection against transient overvoltages and monitoring of an electrical installation |
-
2019
- 2019-10-09 CN CN201910956973.5A patent/CN110716166A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914713A (en) * | 2012-10-23 | 2013-02-06 | 上海市电力公司 | Electromagnetic compatibility test method and device for electric power online monitoring equipment |
| US20170012425A1 (en) * | 2014-02-05 | 2017-01-12 | Cirprotec, S.L. | Combined device for electrical protection against transient overvoltages and monitoring of an electrical installation |
| CN106199113A (en) * | 2016-08-29 | 2016-12-07 | 山东大学（威海） | A kind of active High Pressure Difference sub-probe device |
Non-Patent Citations (1)
| Title |
|---|
| 张超，苏宗文，李澍，王权，李佳戈，任海萍: "电磁兼容抗扰度试验布置验证的研究", 《中国医疗设备》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111458589A (en) * | 2020-04-20 | 2020-07-28 | 西安中科长青医疗科技研究院有限公司 | Electromagnetic compatibility design verification method |
| CN112630722A (en) * | 2021-01-04 | 2021-04-09 | 国网重庆市电力公司营销服务中心 | Electromagnetic anti-interference test signal monitoring device and monitoring system for electric energy meter |
| CN112666408A (en) * | 2021-03-09 | 2021-04-16 | 中国电力科学研究院有限公司 | Method and system for detecting electromagnetic compatibility of submodule controller |
| CN113219287A (en) * | 2021-05-21 | 2021-08-06 | 山东电工电气集团有限公司 | Method for carrying out capacitance compatibility rating and weak link positioning on state net core FTU |
| CN117434372A (en) * | 2023-12-21 | 2024-01-23 | 深圳信测标准技术服务股份有限公司 | Electromagnetic compatibility immunity test method and system for electronic product |
| CN117434372B (en) * | 2023-12-21 | 2024-03-08 | 深圳信测标准技术服务股份有限公司 | Electromagnetic compatibility immunity test method and system for electronic product |
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