CN212459934U - Series resonance test device - Google Patents
Series resonance test device Download PDFInfo
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- CN212459934U CN212459934U CN202020530822.1U CN202020530822U CN212459934U CN 212459934 U CN212459934 U CN 212459934U CN 202020530822 U CN202020530822 U CN 202020530822U CN 212459934 U CN212459934 U CN 212459934U
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Abstract
The series resonance test device comprises a voltage regulator, a transformer, a reactor group, a capacitor group, low-voltage impedance, a measuring unit and measuring impedance; the output end of the voltage regulator is connected with a primary coil of the transformer; the first end of the secondary coil of the transformer is connected with the first end of the reactor group, and the second end of the secondary coil of the transformer is grounded; the second end of the reactor bank is connected with the first end of the capacitor bank; the second end of the capacitor bank is connected with the first end of the low-voltage impedance; the second end of the low-voltage impedance is grounded; the first end of the lightning arrester to be tested is connected with the first end of the capacitor bank, and the second end of the lightning arrester to be tested is connected with the first end of the measuring impedance; the second end of the measuring impedance is grounded; the first end of the measuring unit is connected with the first end of the measuring impedance, the second end of the measuring unit is connected with the first end of the low-voltage resistor, and the measuring unit is used for measuring the electrical property value of the tested lightning arrester through the low-voltage resistor and the measuring impedance, so that the reliable test of the tested lightning arrester is realized.
Description
Technical Field
The utility model belongs to the electrical equipment field, in particular to series resonance test device.
Background
The lightning arrester is an important protective electrical appliance of an electric power system and is widely applied to the electric power system, the reliable operation of the lightning arrester is determined by the electrical characteristics of the lightning arrester, and the measurement and research of the electrical characteristic value of the lightning arrester are very important for the matching of the lightning arrester and the system value. The technical problem that how to verify the performance of the arrester is one of the technical problems to be solved urgently by technical personnel in the field is that a high-voltage test transformer is adopted to carry out an electrical test of the arrester, the required power input capacity is large, the cost of test equipment is high, and the output waveform of the transformer contains harmonic components to influence the accuracy of the measurement of the electrical performance value of the arrester.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a series resonance test device to test the value performance of arrester.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
a series resonance testing apparatus comprising: the device comprises a voltage regulator, a transformer, a reactor group, a capacitor group, a low-voltage impedance, a measuring unit and a measuring impedance;
the input end of the voltage regulator is connected with an external power supply, and the output end of the voltage regulator is connected with the primary coil of the transformer;
the first end of the secondary coil of the transformer is connected with the first end of the reactor group, and the second end of the secondary coil of the transformer is grounded;
the second end of the reactor bank is connected with the first end of the capacitor bank;
the second end of the capacitor bank is connected with the first end of the low-voltage impedance;
the second end of the low-voltage impedance is grounded;
the first end of the lightning arrester to be tested is connected with the first end of the capacitor bank, and the second end of the lightning arrester to be tested is connected with the first end of the measuring impedance;
the second end of the measuring impedance is grounded;
the first end of the measuring unit is connected with the first end of the measuring impedance, the second end of the measuring unit is connected with the first end of the low-voltage impedance, and the measuring unit is used for measuring the electrical property value of the lightning arrester to be measured through the low-voltage impedance and the measuring impedance.
Optionally, in the above series resonance test apparatus, the reactor group is composed of a first reactor and a second reactor which are connected in series, a second end of the first reactor is connected to a first end of the second reactor, the first end of the first reactor is used as the first end of the reactor group, the first reactor is provided with at least one tap, the second end of the second reactor is used as the second end of the reactor group, and the second reactor is provided with at least one tap.
Optionally, in the series resonance testing apparatus, the capacitor bank is formed by connecting a first capacitor and a second capacitor in series, a second end of the first capacitor is connected to a first end of the second capacitor, the first end of the first capacitor is used as the first end of the capacitor bank, and the second end of the second capacitor is used as the second end of the capacitor bank.
Optionally, in the series resonance testing apparatus, the low-voltage impedance is formed by connecting a measuring capacitor and a measuring coil in series.
Optionally, in the series resonance testing apparatus, the measuring impedance is formed by a measuring impedance or a measuring coil.
Optionally, in the above series resonance testing apparatus, a common end of the first reactor and the second reactor is connected to a common end of the first capacitor and the second capacitor and a first end of the lightning arrester to be tested.
Optionally, in the series resonance test device, the measurement unit is provided with an upper computer communication interface for uploading an electrical property value of the measured lightning arrester to the upper computer, where the electrical property value includes, but is not limited to, a low-voltage impedance for representing the performance of the measured lightning arrester, and a voltage and a partial discharge signal on the measurement impedance.
Optionally, in the series resonance test apparatus, the communication interface is a cable communication interface, an optical fiber communication interface, or a wireless communication interface.
Based on the technical scheme, the embodiment of the utility model provides an above-mentioned scheme, the utility model provides an adopt high-voltage testing transformer to carry out by survey arrester test article electrical test, the power input capacity that its needs is big and test equipment cost is high to transformer output waveform contains the problem that harmonic component influences the degree of accuracy of arrester electrical performance value measurement, provides a measuring accuracy height, the little and low test equipment of equipment cost of the power capacity of needs for the electrical performance value measurement of being surveyed the arrester.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a series resonance testing apparatus disclosed in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The application discloses a series resonance test device for carrying out electrical performance parameter value test to arrester, see fig. 1, the device can include:
the device comprises a voltage regulator 1, a transformer 2, a reactor group 7, a capacitor group 8, a low-voltage impedance 10, a measuring unit 12 and a measuring impedance 13.
The input end of the voltage regulator 1 is connected with an external power supply, the external power supply is an alternating current power supply, and the output end of the voltage regulator 1 is connected with a primary coil of the transformer 2 so as to transmit the regulated alternating current to the transformer 2;
a first end of a secondary coil of the transformer 2 is connected with a first end of the reactor group 7, and a second end of the secondary coil of the transformer 2 is grounded;
the second end of the reactor bank 7 is connected to the first end of the capacitor bank 8;
the second end of the capacitor bank 8 is connected to the first end of the low-voltage impedance 10;
the second end of the low-voltage impedance 10 is grounded;
a first end of the lightning arrester under test 14 is connected to a first end of the capacitor bank 8, and a second end of the lightning arrester under test 14 is connected to a first end of the measuring impedance 13;
the second end of the measuring impedance 13 is grounded;
a first end of the measuring unit 12 is connected to a first end of the measuring impedance 13, a second end of the measuring unit 12 is connected to a first end of the low-voltage impedance 10, and the measuring unit 12 is configured to measure an electrical performance value of the lightning arrester 14 through the low-voltage impedance 10 and the measuring impedance 13.
The number of the reactors and the capacitors included in the reactor group 7 and the capacitor group 8 can be selected according to the user requirement, in this scheme, the reactor group 7 is composed of a first reactor and a second reactor which are connected in series, the second end of the first reactor is connected with the first end of the second reactor, the first end of the first reactor is used as the first end of the reactor group, at least one tap is arranged on the first reactor and the second reactor, the number of the taps can be 2-5, the taps are used for adjusting the inductance of the reactor group 7 to generate series resonance for different measured lightning arresters 14 with different capacitance, the second end of the second reactor is used as the second end of the reactor group, and at least one tap is arranged on the second reactor. The capacitor bank 8 is formed by connecting a first capacitor and a second capacitor in series, the second end of the first capacitor is connected with the first end of the second capacitor, the first end of the first capacitor is used as the first end of the capacitor bank, the second end of the second capacitor is used as the second end of the capacitor bank, the first capacitor and the second capacitor form a voltage divider with low-voltage impedance 10, and the capacitor bank plays the role of a capacitor of series resonance and the role of high-voltage impedance of the voltage divider.
In the present application, the low-voltage impedance 10 is formed by connecting a measuring capacitor and a measuring coil in series, and the low-voltage impedance 10 is connected with a capacitor bank in series to form a voltage divider. The measuring impedance 13 is composed of a measuring resistor or a measuring coil and is connected in series with the low-voltage end of the tested lightning arrester test article.
And further, in order to increase the output current which can be provided by equipment, the common end of the first reactor and the second reactor is connected with the common end of the first capacitor and the second capacitor and the first end of the lightning arrester to be tested.
In the above scheme, the primary side of the transformer 2 is connected to the voltage regulator 1, and the secondary side coil is connected in series with two reactors 7, two capacitors 8 and a low-voltage impedance 10 through a node one 3, a node two 5, a node three 9 and a node four 11 to form a series resonance loop, the first node refers to a node between a first terminal of the first reactor and the transformer, the second node refers to a node between the first transformer and the second transformer, the third node refers to the node between the first capacitor and the second capacitor, the fourth node refers to the node connected to ground, the lightning arrester under test 14 is connected in series with the measuring impedance 13, and the testing device is connected between a node four 11 and a node five 15 and is connected in parallel with two ends of the capacitor bank and the low-voltage impedance 10, the testing device is grounded through the node four 11, and the node five 15 refers to a node between the lightning arrester to be tested and the capacitor bank.
By adjusting the tap 4 of the first reactor and the tap 6 of the second reactor, the inductance of the reactor group 7 is adjusted for the tested lightning arrester 14 with different capacitance to generate series resonance. During the test, the output of the combined power supply is 48 Hz-62 Hz, the voltage regulator 1 is adjusted, through the series resonance of the test loop, the capacitor bank 8 generates 48 Hz-62 Hz high voltage to be applied to the tested lightning arrester 14, and then the electrical performance value of the lightning arrester test product 14 is measured through the low-voltage impedance 10, the measuring impedance 13 and the measuring unit 12. The measuring unit is provided with an upper computer communication interface and used for uploading the electrical property value of the measured lightning arrester to the upper computer, wherein the electrical property value comprises but is not limited to low-voltage impedance used for representing the performance of the measured lightning arrester and voltage and partial discharge signals on the measuring impedance. The communication interface may be a cable communication interface, an optical fiber communication interface or a wireless communication interface, and is transmitted to the host computer through the communication interface of the measurement unit 12 by using a communication cable, an optical fiber or a wireless communication mode.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A series resonance test apparatus, comprising: the device comprises a voltage regulator, a transformer, a reactor group, a capacitor group, a low-voltage impedance, a measuring unit and a measuring impedance;
the input end of the voltage regulator is connected with an external power supply, and the output end of the voltage regulator is connected with the primary coil of the transformer;
the first end of the secondary coil of the transformer is connected with the first end of the reactor group, and the second end of the secondary coil of the transformer is grounded;
the second end of the reactor bank is connected with the first end of the capacitor bank;
the second end of the capacitor bank is connected with the first end of the low-voltage impedance;
the second end of the low-voltage impedance is grounded;
the first end of the lightning arrester to be tested is connected with the first end of the capacitor bank, and the second end of the lightning arrester to be tested is connected with the first end of the measuring impedance;
the second end of the measuring impedance is grounded;
the first end of the measuring unit is connected with the first end of the measuring impedance, the second end of the measuring unit is connected with the first end of the low-voltage impedance, and the measuring unit is used for measuring the electrical property value of the lightning arrester to be measured through the low-voltage impedance and the measuring impedance.
2. The series resonance test apparatus as claimed in claim 1, wherein said reactor group is composed of a first reactor and a second reactor connected in series, a second end of said first reactor is connected to a first end of said second reactor, said first end of said first reactor is a first end of said reactor group, said first reactor is provided with at least one tap, said second end of said second reactor is a second end of said reactor group, and said second reactor is provided with at least one tap.
3. The series resonance test apparatus of claim 2, wherein the capacitor bank is formed by connecting a first capacitor and a second capacitor in series, the second terminal of the first capacitor is connected to the first terminal of the second capacitor, the first terminal of the first capacitor is used as the first terminal of the capacitor bank, and the second terminal of the second capacitor is used as the second terminal of the capacitor bank.
4. The series resonance test apparatus of claim 1, wherein the low voltage impedance is comprised of a measurement capacitor and a measurement coil in series.
5. The series resonance test apparatus of claim 1, wherein the measured impedance is comprised of a measured impedance or a measured coil.
6. The series resonance test apparatus of claim 3, wherein a common terminal of the first reactor and the second reactor is connected to a common terminal of the first capacitor and the second capacitor and a first terminal of the lightning arrester under test.
7. The series resonance test device according to claim 1, wherein the measuring unit is provided with an upper computer communication interface for uploading electrical property values of the lightning arrester to be tested to the upper computer, wherein the electrical property values include but are not limited to low-voltage impedance for representing the performance of the lightning arrester to be tested, and voltage and partial discharge signals on the measuring impedance.
8. The series resonance testing apparatus of claim 7, wherein the communication interface is a cable communication interface, a fiber communication interface or a wireless communication interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020530822.1U CN212459934U (en) | 2020-04-10 | 2020-04-10 | Series resonance test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020530822.1U CN212459934U (en) | 2020-04-10 | 2020-04-10 | Series resonance test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212459934U true CN212459934U (en) | 2021-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020530822.1U Active CN212459934U (en) | 2020-04-10 | 2020-04-10 | Series resonance test device |
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| CN (1) | CN212459934U (en) |
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