阅读说明：本技术 一种电子式互感器的敏感部件的测试方法 (Method for testing sensitive part of electronic transformer ) 是由 史常凯 吴燕 古凌云 柏志新 焦重庆 何日 胡逸帆 于 2018-09-07 设计创作，主要内容包括：本发明提供一种电子式互感器的敏感部件的测试方法及系统,通过施加使电子式互感器出现故障的电磁波,将电子式互感器的一个组成部件暴露在电磁波环境下,其余部件处于电磁屏蔽箱中,查看电子式互感器的工作状态。当电子式互感器出现数据丢包、输出波形畸变等故障时,此时,电子屏蔽箱外的组成部件即为敏感部件。本发明提供的技术方案,可以准确的分析出电子式互感器受辐射电磁骚扰下的敏感部件,找出电子式互感器抗扰度水平的薄弱环节,更有针对性的提高电子式互感器的射频辐射抗扰度水平。(The invention provides a method and a system for testing a sensitive part of an electronic transformer. When the electronic transformer has faults such as data packet loss, output waveform distortion and the like, the component outside the electronic shielding box is the sensitive component. According to the technical scheme provided by the invention, the sensitive part of the electronic transformer under the radiation electromagnetic disturbance can be accurately analyzed, the weak link of the immunity level of the electronic transformer is found, and the radio frequency radiation immunity level of the electronic transformer is improved in a more targeted manner.)

1. A method for testing a sensitive component of an electronic transformer, the method comprising:

acquiring electromagnetic waves which cause the electronic transformer to have faults in a space electromagnetic field;

the electromagnetic wave is applied in a space electromagnetic field, and a sensitive component in the electronic transformer is determined by using an electromagnetic shielding box.

2. The method of claim 1, wherein the acquiring of the electromagnetic waves before the spatial electromagnetic field causes the electronic transformer to malfunction comprises:

and connecting the electronic transformer with a current load, a power supply and a signal wire according to the installation instruction of the electronic transformer, so that the electronic transformer can normally operate in a space electromagnetic field.

3. The method of claim 1, wherein the acquiring electromagnetic waves causing the electronic transformer to malfunction in the spatial electromagnetic field comprises:

selecting a frequency point within a frequency range of 80 MHz-1000 MHz, applying electromagnetic waves in a space electromagnetic field under the conditions of vertical polarization and horizontal polarization, and gradually increasing the intensity of the electromagnetic waves until the electronic transformer fails, wherein the frequency point corresponds to the applied electromagnetic waves and is the electromagnetic waves which cause the electronic transformer to fail.

4. The method of claim 1, wherein the determining sensitive components in the electronic transformer using the electromagnetic shielding box comprises:

one of a collector, a merging unit and a secondary cable in the electronic transformer is arranged outside the electromagnetic shielding box, and if the electronic transformer fails, a part arranged outside the electromagnetic shielding box is a sensitive part.

5. The method of claim 1, wherein the electronic transformer fails when data packet loss or output waveform distortion occurs when the host computer receives the electronic transformer data.

6. A system for testing sensitive components of an electronic transformer, the system comprising:

the electromagnetic shielding box comprises a judgment module, an electronic transformer, an electromagnetic shielding box and an electromagnetic wave transmitter, wherein the electronic transformer, the electromagnetic shielding box and the electromagnetic wave transmitter are respectively arranged in a space electromagnetic field;

the electronic transformer is connected with a current load and a power supply respectively and is connected with the judgment module through a signal wire;

the electromagnetic wave transmitter is used for applying electromagnetic waves which cause the electronic transformer to be out of order to a space electromagnetic field;

the electromagnetic shielding box is used for respectively placing one of the collector, the merging unit and the secondary cable of the electronic transformer outside the electromagnetic shielding box and shielding electromagnetic waves applied to the collector, the merging unit and the secondary cable of the electronic transformer;

and the judging module is used for determining the sensitive part of the electronic transformer according to the fault condition of the electronic transformer.

7. The system of claim 6, wherein the determination of the electromagnetic waves that cause the electronic transformer to fail comprises:

selecting a frequency point within a frequency range of 80 MHz-1000 MHz, applying electromagnetic waves in a space electromagnetic field under the conditions of vertical polarization and horizontal polarization, and gradually increasing the intensity of the electromagnetic waves until the electronic transformer fails, wherein the frequency point corresponds to the applied electromagnetic waves and is the electromagnetic waves which cause the electronic transformer to fail.

8. The system of claim 6, wherein the determination module is to:

if the electronic transformer fails, the part arranged outside the electromagnetic shielding box is a sensitive part;

when data packet loss or output waveform distortion occurs when the judging module receives the data of the electronic transformer, the electronic transformer breaks down.

Technical Field

The invention relates to the technical field of electromagnetic compatibility, in particular to a method for testing a sensitive part of an electronic transformer.

Background

With the large-scale application of ultrahigh voltage and extra-high voltage transmission of a power distribution network and the popularization of an intelligent power transmission and transformation technology, the transmission voltage grade of the power distribution network is continuously improved, and high-frequency components in a transformer substation and a converter station are more and more, so that a large amount of electromagnetic interference can be generated in a space field of the transformer substation/the converter station which normally operates. The problem of electromagnetic disturbance in the space is increasingly prominent, and the normal operation of the power transformation equipment is directly influenced. With the acceleration of intelligent power transformation construction, the space of a transformer substation is more compact and intensive, and how to realize effective shielding and compatibility between primary equipment and secondary equipment is concerned day by day, so that higher and higher requirements on electromagnetic compatibility are provided. Particularly, the electronic transformer is used as secondary equipment and is more and more widely applied to a transformer substation, and the problem of electromagnetic compatibility is more and more emphasized.

At present, a radio frequency electromagnetic field radiation immunity test performed on an electronic transformer only evaluates the radiation immunity level of the electronic transformer, and a sensitive component of the electronic transformer subjected to radiation electromagnetic disturbance cannot be accurately analyzed, so that main factors influencing the immunity level of the electronic transformer are determined.

Therefore, in order to solve the problem and accurately analyze the sensitive component under the disturbance of the radiation electromagnetism, a method and a system for testing the sensitive component of the electronic transformer under the disturbance of the radiation electromagnetism are urgently needed.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides a method and a system for testing a sensitive part of an electronic transformer.

The technical scheme provided by the invention is as follows:

in a method of testing sensitive components of an electronic transformer, the improvement comprising:

acquiring electromagnetic waves which cause the electronic transformer to have faults in a space electromagnetic field;

the electromagnetic wave is applied in a space electromagnetic field, and a sensitive component in the electronic transformer is determined by using an electromagnetic shielding box.

Preferably, the acquiring the electromagnetic wave before the electromagnetic field in the space causes the electronic transformer to malfunction includes:

and connecting the electronic transformer with a current load, a power supply and a signal wire according to the installation instruction of the electronic transformer, so that the electronic transformer can normally operate in a space electromagnetic field.

Preferably, the acquiring electromagnetic waves causing the electronic transformer to malfunction in the space electromagnetic field includes:

selecting a frequency point within a frequency range of 80 MHz-1000 MHz, applying electromagnetic waves in a space electromagnetic field under the conditions of vertical polarization and horizontal polarization, and gradually increasing the intensity of the electromagnetic waves until the electronic transformer fails, wherein the frequency point corresponds to the applied electromagnetic waves and is the electromagnetic waves which cause the electronic transformer to fail.

Preferably, the method for determining the sensitive component in the electronic transformer by using the electromagnetic shielding box comprises the following steps:

one of a collector, a merging unit and a secondary cable in the electronic transformer is arranged outside the electromagnetic shielding box, and if the electronic transformer fails, a part arranged outside the electromagnetic shielding box is a sensitive part.

Further, when the upper computer receives the data of the electronic transformer, data packet loss or output waveform distortion occurs, the electronic transformer fails.

In a system for testing sensitive components of an electronic transformer subject to radiated electromagnetic disturbances, the improvement comprising:

the electromagnetic shielding box comprises a judgment module, an electronic transformer, an electromagnetic shielding box and an electromagnetic wave transmitter, wherein the electronic transformer, the electromagnetic shielding box and the electromagnetic wave transmitter are respectively arranged in a space electromagnetic field;

the electronic transformer is connected with a current load and a power supply respectively and is connected with the judgment module through a signal wire;

the electromagnetic wave transmitter is used for applying electromagnetic waves which cause the electronic transformer to be out of order to a space electromagnetic field;

the electromagnetic shielding box is used for respectively placing one of the collector, the merging unit and the secondary cable of the electronic transformer outside the electromagnetic shielding box and shielding electromagnetic waves applied to the collector, the merging unit and the secondary cable of the electronic transformer;

and the judging module is used for determining the sensitive part of the electronic transformer according to the fault condition of the electronic transformer.

Preferably, the process of determining the electromagnetic wave causing the electronic transformer to malfunction includes:

selecting a frequency point within a frequency range of 80 MHz-1000 MHz, applying electromagnetic waves in a space electromagnetic field under the conditions of vertical polarization and horizontal polarization, and gradually increasing the intensity of the electromagnetic waves until the electronic transformer fails, wherein the frequency point corresponds to the applied electromagnetic waves and is the electromagnetic waves which cause the electronic transformer to fail.

Preferably, the judging module is configured to:

if the electronic transformer fails, the part arranged outside the electromagnetic shielding box is a sensitive part;

when data packet loss or output waveform distortion occurs when the judging module receives the data of the electronic transformer, the electronic transformer breaks down.

Compared with the closest prior art, the technical scheme provided by the invention has the following excellent effects:

the invention provides a method and a system for testing a sensitive component of an electronic transformer under the disturbance of radiation electromagnetism. According to the testing method, electromagnetic waves which cause the electronic transformer to have faults in a space electromagnetic field are obtained, the electromagnetic waves are applied to the space electromagnetic field, and a sensitive component in the electronic transformer is determined by using an electromagnetic shielding box. Based on the two steps, the analysis and determination of the sensitive part of the electronic transformer under the radiation electromagnetic disturbance can be accurately completed.

Furthermore, the method utilizes an electromagnetic shielding box, and one component of the electronic transformer is arranged outside the box, and the rest components are arranged in the box. Whether the component outside the electromagnetic shielding box breaks down or not is verified by applying the electromagnetic field intensity under the frequency point where the electronic transformer breaks down. Because other components are positioned in the electromagnetic shielding box and are not influenced by the electromagnetic field intensity under the frequency point, the component which is positioned outside the shielding box is necessarily caused as long as a fault occurs, and the component is a sensitive component of the electronic transformer under the disturbance of radiation electromagnetism. In the method, a part is placed outside an electromagnetic shielding box in turn to be tested; and the electromagnetic field intensity under the same frequency point is implemented, sensitive components under the disturbance of radiation electromagnetism can be accurately analyzed, and main factors influencing the immunity level of the electronic transformer are determined.

Drawings

FIG. 1 is a flow chart of a method for testing a sensitive component of an electronic transformer according to the present invention;

FIG. 2 is a schematic structural diagram of a system for testing a sensitive component of an electronic transformer according to the present invention;

FIG. 3 is a waveform diagram of an output signal at a field strength of 30V/m during the implementation of the method for testing the sensitive component of the electronic transformer according to the present invention;

FIG. 4 is a waveform diagram of an output signal at a field strength of 40V/m during the implementation of the method for testing the sensitive component of the electronic transformer according to the present invention;

FIG. 5 is a diagram of an output waveform when the field strength is 50V/m and the 100MHz vertical polarization is adopted in the implementation process of the method for testing the sensitive component of the electronic transformer according to the present invention;

FIG. 6 is a waveform diagram of an output waveform when the field strength is 50V/m and the horizontal polarization is 500MHz in the implementation process of the method for testing the sensitive component of the electronic transformer according to the present invention;

FIG. 7 is a diagram of an output waveform when the merging unit is located outside the shielding box and the field strength is 50V/m and the 100MHz vertical polarization is performed in the implementation process of the method for testing the sensitive component of the electronic transformer according to the present invention;

FIG. 8 is a waveform diagram of output when the Ge ice unit is located outside the shielding box, the field strength is 50V/m, and the horizontal polarization of 500MHz is performed in the implementation process of the method for testing the sensitive component of the electronic transformer.

Detailed Description

Embodiments of the present invention will be further described with reference to the accompanying drawings.