CN111736105A - Device and method for testing anti-interference performance of frequency-selecting voltmeter - Google Patents
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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
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
- G01R1/203—Resistors used for electric measuring, e.g. decade resistors standards, resistors for comparators, series resistors, shunts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
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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 the field of industrial control testing, in particular to an anti-interference performance testing device and method for a frequency-selecting voltmeter. The problem of high efficiency and the automatic anti-interference performance test of accomplishing the frequency selection voltmeter under different interfering signal is solved. The anti-interference performance testing device provided by the invention is added with three core components of an industrial personal computer, an interference signal generating module and a pilot frequency signal generating module, and provides an anti-interference performance testing method of a frequency-selecting voltmeter, which comprises the following steps: the industrial personal computer controls the interference signal generating module and the pilot frequency signal generating module to provide a plurality of groups of signals, and reads and records corresponding frequency-selecting voltmeter data; and analyzing and outputting an interference result of the frequency-selecting voltmeter by calculating the signal-to-noise ratio and the error of the voltage before and after the interference. And the user can confirm the applicable application range of the frequency-selecting voltmeter according to the interference result. The invention has high intelligent degree, does not need to manually debug signal frequency and process data, and can achieve the aims of safety and simple and convenient test.
Description
Technical Field
The invention relates to the field of industrial control testing, in particular to an anti-interference performance testing device and method for a frequency-selecting voltmeter.
Background
When a large-scale ground grid is measured, strong interferences with different frequencies generally exist, voltage and current signals to be measured are weak generally, measured signals are often submerged in the strong interference signals, and a conventional meter cannot obtain correct readings under the interference, and even can be damaged. The generation of the frequency conversion grounding measurement system solves the problem of ground grid measurement under strong interference on site. The core component of the frequency conversion grounding measurement system is the frequency selection voltmeter, the anti-interference performance of the frequency selection voltmeter directly determines the anti-interference performance of the measurement system, and the characteristic parameters of the grounding device are further influenced: the accuracy of test data such as grounding impedance, field surface potential gradient, step potential difference, contact potential difference and the like. When the field interference exceeds the maximum anti-interference performance of the instrument, the measured data can deviate by multiple times, so that people can judge the result by mistake, and the serious loss or the serious hidden safety hazard is directly caused. Therefore, it is very important to accurately judge the anti-interference performance of the frequency-selecting volt-ampere meter.
In the prior art, a method for testing the power frequency interference resistance of a frequency-selecting voltmeter comprises the following steps: firstly, a frequency conversion voltmeter is connected into a test circuit, the output of a frequency conversion power supply is adjusted to a proper size, and under the condition that a power frequency interference transformer is not electrified, a pilot frequency is selected by a frequency selection voltmeter, such as 55Hz, and the pilot frequency voltage U on Re is measuredy1Current Iy1And impedance Zy1. Secondly, a 220V 50Hz power supply is connected with the power frequency interference transformer, and the power frequency interference voltage U can be measured by the frequency selection of the frequency selection voltmeter and the frequency selection of 50Hzg(ii) a At the moment, the frequency-selecting voltmeter selects 55Hz again to measure the pilot frequency voltage Uy2Impedance Zy2It is connected with Uy1、Zy1The error should be less than or equal to 5%. Recalculate Uy1：UgThe signal-to-noise ratio is an index for measuring the frequency-selecting anti-interference performance of the frequency-selecting voltmeter.
However, the prior art has the following problems: at present, when the anti-interference performance of a frequency-selecting voltmeter is actually tested, the frequency of an interference signal can be only fixed, a power frequency is usually selected, only a single frequency interference performance test is carried out, and the anti-interference performance of the frequency-selecting voltmeter cannot be completely reflected.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention aims to establish an automatic frequency-selecting voltmeter anti-interference performance testing device and method. The test device can complete the following tests: detecting the anti-interference performance of the frequency-selecting voltmeter under the condition of the same pilot frequency signal and different interference signals; and under the condition of the same interference signal and different pilot frequency signals, detecting the anti-interference performance of the frequency-selecting voltmeter.
The first aspect of the embodiments of the present invention shows a device for testing anti-interference performance of a frequency-selecting voltmeter, including:
the system comprises an industrial personal computer, an interference signal generating module, a pilot frequency signal generating module, a current pole simulation resistor Rc, a ground grid simulation standard resistor Re and a frequency selection voltmeter;
the first end of the industrial personal computer is connected with the first end of the interference signal generation module; the interference signal generation module receives an instruction output by the industrial personal computer and outputs an electric signal with corresponding frequency according to the instruction, and the interference signal generation module can output electric signals with different frequencies;
the second end of the industrial personal computer is connected with the first end of the pilot frequency signal generation module; the pilot frequency signal generation module receives an instruction output by the industrial personal computer and outputs an electric signal with corresponding frequency according to the instruction, and the pilot frequency signal generation module can output pilot frequency electric signals with different frequencies;
the third end of the industrial personal computer is connected with the first end of the frequency-selecting voltmeter; the frequency-selecting voltmeter sends data information to the industrial personal computer; the industrial personal computer records and stores data information, and then outputs the anti-interference performance detection result of the frequency-selecting voltmeter through analysis and calculation.
The second end of the interference signal generation module is connected with the second end of the frequency-selecting voltmeter, and the third end of the interference signal generation module is respectively connected with the first end of Re and the second end of Rc; the second end of the pilot frequency signal generation module is connected with the first end of the Rc; the second end of Rc is connected with the first end of Re; the second end of the Re is connected with the third end of the pilot frequency signal generation module; the third end of the frequency-selecting voltmeter is connected with the second end of Re; therefore, the frequency-selecting voltmeter is connected into the test circuit, the frequency-selecting voltmeter is connected in parallel at two ends of Re, and the voltage value of Re under electric signals with different frequencies is measured.
Further, the pilot frequency signal generation module comprises: the power amplifier comprises a signal wave generator and a power amplifier module; different frequency pilot signals of different frequencies can be provided to the test circuit. The first end of the signal wave generator is connected with the second end of the industrial personal computer; the second end of the signal wave generator is connected with the first end of the power amplification module; the second end of the power amplifier module is connected with the first end of the Rc, and the third end of the power amplifier module is connected with the second end of the Re.
Further, the anti-interference performance testing device further comprises: the frequency-selecting ammeter is connected between the second end of the Re and the third end of the pilot frequency signal generation module; the current value through Re can be measured.
Further, the signal wave generator is a sine wave signal generator; the sine wave signal generator is capable of providing a more stable undistorted sine wave signal.
A second aspect of the embodiments of the present invention shows a method for testing anti-interference performance of a frequency-selecting voltmeter, including:
the frequency selection voltmeter selects different frequencies;
the industrial personal computer sends a first instruction, and the first instruction is used for instructing the pilot frequency signal generation module to output a pilot frequency electric signal with preset frequency and selecting the pilot frequency by the frequency selection voltmeter;
the pilot frequency signal generation module responds to the received first control instruction and outputs a pilot frequency electric signal;
the frequency selection voltmeter responds to the received first control instruction and selects the pilot frequency;
when the pilot frequency electric signal flows through Re and Rc, the industrial personal computer records the number U of the frequency-selecting voltmetery1；
The industrial personal computer sends a second instruction, and the second instruction is used for indicating the interference signal generation module to output an interference signal;
the interference signal generation module responds to the received instruction of the second controller and outputs an interference signal;
the industrial personal computer sends a third instruction, and the third instruction is used for indicating the frequency-selecting voltmeter to select the frequency of the interference signal;
the frequency selection voltmeter responds to the received third control instruction and selects the frequency of the interference signal;
when the interference signal acts on Re and Rc, the industrial personal computer records the number U of the frequency-selecting voltmeterg；
The industrial personal computer sends a fourth instruction, the fourth instruction is used for indicating the frequency-selecting voltmeter to select the frequency of the pilot frequency electric signal, and the industrial personal computer records the number U of the frequency-selecting voltmetery2；
According to the Uy1、Uy2And UgAnd generating an interference result.
According to the Uy1、Uy2And UgThe step of generating the interference result comprises:
calculating a ratio of said Uy1And said Uy2Absolute value of difference and Uy1The ratio is stored in the industrial personal computer;
calculating the signal-to-noise ratio which is the Uy1And said UgThe ratio of (A) to (B) and storing the ratio in the industrial personal computer;
if the ratio is less than or equal to 5%, the interference result is qualified;
and if the ratio is more than 5%, the interference result is unqualified.
It can be seen from the above technical solutions that the embodiments of the present invention illustrate an apparatus and a method for testing anti-interference performance of a frequency-selective voltmeter, where the apparatus includes: the device comprises an industrial personal computer, an interference signal generation module, a pilot frequency signal generation module, a current pole simulation resistor Rc, a ground grid simulation standard resistor Re and a frequency selection voltmeter. Because the interference signal generation module arranged in the device shown in the embodiment of the invention can be a multifunctional signal generator, the multifunctional signal generator can output electric signals with corresponding frequencies according to instructions, and the interference signal generation module can output electric signals with different frequencies; therefore, the device shown in the invention can accurately measure the anti-interference performance of the frequency-selecting voltmeter under different signal-to-noise ratios without manually adjusting different pilot frequency signals and interference signals: the anti-interference performance of the frequency-selecting voltmeter under the same pilot frequency signal and different interference signals; the anti-interference performance of the frequency-selecting voltmeter under the same interference signal and different pilot frequency signals. The data is automatically stored and analyzed by utilizing the computer technology, and the result is output, so that the detection operation is simple and the efficiency is high.
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 first schematic diagram of an anti-interference performance testing device of a frequency-selecting voltmeter;
FIG. 2 is a schematic diagram of a second apparatus for testing anti-interference performance of a frequency-selecting voltmeter;
FIG. 3 is a third schematic diagram of the anti-interference performance testing device of the frequency-selecting voltmeter;
fig. 4 is a schematic diagram of the interference resistance testing device for the frequency-selecting voltmeter.
Detailed Description
In order to make the technical solutions in the embodiments of the present invention better understood and make the above objects, features and advantages of the embodiments of the present invention more comprehensible, the technical solutions in the embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of an apparatus for testing anti-interference performance of a frequency-selecting voltmeter, as shown in fig. 1: a first end 11 of the industrial personal computer 1 is connected with a first end 21 of the interference signal generating module 2, a second end 12 of the industrial personal computer 1 is connected with a first end 31 of the pilot frequency signal generating module 3, and a third end 13 of the industrial personal computer 1 is connected with a first end 61 of the frequency-selecting voltmeter 6; the second terminal 22 of the interference signal generating module 2 is connected with the second terminal 62 of the frequency-selecting voltmeter 6, and the third terminal 23 of the interference signal generating module 2 is respectively connected with the first terminal 51 of Re5 and the second terminal 42 of Rc 4; the second end 32 of the pilot frequency signal generation module 3 is connected with the first end 41 of Rc 4; the second end 42 of Rc4 is connected to the first end 51 of Re 5; the second end 52 of the Re5 is connected with the third end 33 of the pilot frequency signal generation module 3; the third terminal 63 of the frequency-selecting voltmeter 6 is connected with the second terminal 52 of the Re 5.
The frequency-selecting voltmeter 6 is connected into the test circuit, the industrial personal computer 1 is used as an industrial computer with control, storage and calculation functions, the frequency-selecting voltmeter 6 can be controlled to select proper pilot frequency, then the industrial personal computer 1 outputs a first instruction to the pilot frequency signal generating module 3, and the pilot frequency signal generating module 3 outputs a pilot frequency electric signal; at this time, the interference signal generation module 2 is not conducted; the industrial personal computer 1 reads back the measured pilot frequency voltage U on Re5y1Then, the pilot frequency voltage U on Re5 is measured by the instruction data sent by the industrial personal computer and the frequency-selecting voltmeter 6 under the instructiony1And recorded and stored in the storage module of the industrial personal computer 1.
Calculating the ratio and outputting the result:
the ratio is the Uy1And said Uy2Absolute value of difference and Uy1The ratio is stored in the industrial personal computer;
calculating the signal-to-noise ratio which is the Uy1And said UgThe ratio of (A) to (B) and storing the ratio in the industrial personal computer;
if the ratio is less than or equal to 5%, the interference result is qualified;
and if the ratio is more than 5%, the interference result is unqualified.
The frequency-selecting voltmeter with good anti-interference performance preferably satisfies the following signal-to-noise ratio (Uy 1: Ug) range:
the voltage grade of a transformer substation of the tested grounding device is less than or equal to 35kV, and the signal-to-noise ratio is greater than or equal to 1: 10;
the voltage grade of a transformer substation of the tested grounding device is 110kV, and the signal-to-noise ratio is more than or equal to 1: 50;
the voltage class of a transformer substation of the tested grounding device is 220kV, and the signal-to-noise ratio is more than or equal to 1: 100;
the voltage grade of a transformer substation of the tested grounding device is more than or equal to 500kV, and the signal-to-noise ratio is more than or equal to 1: 200.
The interference signal generating module 2 may be a multifunctional signal generator, the multifunctional signal generator may output an electrical signal of a corresponding frequency according to the instruction, and the interference signal generating module 2 may output electrical signals of different frequencies.
Fig. 2 is a schematic diagram of an anti-interference performance testing apparatus of a frequency-selecting voltmeter, as shown in fig. 2: the pilot signal generation module 3 includes: a signal wave generator 7 and a power amplifier module 8; the first end 71 of the signal wave generator 7 is connected with the second end 12 of the industrial personal computer 1; the second end 72 of the signal wave generator 7 is connected with the first end 81 of the power amplification module 8; the second end 82 of the power amplifier module 8 is connected to the first end 41 of Rc4, and the third end 83 of the power amplifier module 8 is connected to the second end 52 of Re 5.
The signal wave generator 7 provides the pilot frequency electric signal, and the pilot frequency electric signal is amplified by the power amplification module 8 and then is connected to the test circuit. The signal wave generator 7 can provide different frequency signals with different frequencies, and can complete the anti-interference performance detection of the frequency-selecting voltmeter under the same interference signal and different frequency signals.
Fig. 3 is a schematic diagram of an anti-interference performance testing apparatus of a frequency-selecting voltmeter, as shown in fig. 3: the anti-interference performance testing arrangement of frequency selection voltmeter still includes: and the frequency-selecting ammeter 9, wherein the frequency-selecting ammeter 9 is connected between the second end 52 of the Re and the third end 33 of the pilot frequency signal generation module.
After the frequency-selecting ammeter 9 is added, the value of the current flowing through Re5 can be measured, and the characteristic parameters of other grounding devices can be conveniently calculated.
Fig. 4 is a schematic diagram of an anti-interference performance testing apparatus of a frequency-selecting voltmeter, as shown in fig. 4: the signal wave generator is a sine wave generator, and the sine wave signal generator can select a sine wave signal with a proper size, and the sine wave signal is amplified by the power amplification module and then is connected to the test circuit. The amplified sinusoidal signal is stable and undistorted, and has a remarkable effect on improving the detection performance.
Multiple groups of test data can be set through an industrial personal computer for automatic test, and U is set under different test datay1And Uy2Absolute value of difference and Uy1Recording the ratio and recording the U under different test datay1：UgAnd recording, and analyzing the application range to obtain the application range of the frequency-selecting voltmeter. Having shown and described the basic principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereofThe invention is realized. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
The embodiments of the present invention are described in detail, and the embodiments are only examples of the general inventive concept, and should not be construed as limiting the scope of the present invention. Any other embodiments extended by the solution according to the invention without inventive step will be within the scope of protection of the invention for a person skilled in the art.
Claims (6)
1. The utility model provides a frequency-selecting voltmeter anti-interference performance testing arrangement which characterized in that includes:
the device comprises an industrial personal computer (1), an interference signal generating module (2), a pilot frequency signal generating module (3), a current pole simulation resistor Rc (4), a ground grid simulation standard resistor Re (5) and a frequency-selecting voltmeter (6);
a first end (11) of the industrial personal computer (1) is connected with a first end (21) of the interference signal generation module (2), a second end (12) of the industrial personal computer (1) is connected with a first end (31) of the pilot frequency signal generation module (3), and a third end (13) of the industrial personal computer (1) is connected with a first end (61) of the frequency selection voltmeter (6);
a second end (22) of the interference signal generation module (2) is connected with a second end (62) of the frequency-selecting voltmeter (6), and a third end (23) of the interference signal generation module (2) is respectively connected with a first end (51) of the Re (5) and a second end (42) of the Rc (4);
the second end (32) of the pilot frequency signal generation module (3) is connected with the first end (41) of the Rc (4);
the second end (42) of the Rc (4) is connected to the first end (51) of the Re (5);
the second end (52) of the Re (5) is connected with the third end (33) of the pilot frequency signal generation module (3);
and a third end (63) of the frequency-selecting voltmeter (6) is connected with a second end (52) of the Re (5).
2. The apparatus for testing interference rejection performance according to claim 1, wherein said pilot frequency signal generating module (3) comprises: a signal wave generator (7) and a power amplifier module (8);
a first end (71) of the signal wave generator (7) is connected with a second end (12) of the industrial personal computer (1); the second end (72) of the signal wave generator (7) is connected with the first end (81) of the power amplification module (8);
and a second end (82) of the power amplification module (8) is connected with a first end (41) of the Rc (4), and a third end (83) of the power amplification module (8) is connected with a second end (52) of the Re (5).
3. The apparatus according to claim 1 or 2, further comprising:
and the frequency-selecting ammeter (9), wherein the frequency-selecting ammeter (9) is connected between the second end (52) of the Re and the third end (33) of the pilot frequency signal generation module.
4. The antijam capability test device of claim 2, wherein the signal wave generator (7) is a sine wave signal generator.
5. An interference resistance test method applied to the interference resistance test apparatus according to any one of claims 1 to 4, comprising:
the frequency selection voltmeter selects different frequencies;
the industrial personal computer sends a first instruction, and the first instruction is used for instructing the pilot frequency signal generation module to output a pilot frequency electric signal with preset frequency and selecting the pilot frequency by the frequency selection voltmeter;
the pilot frequency signal generation module responds to the received first control instruction and outputs a pilot frequency electric signal;
the frequency selection voltmeter responds to the received first control instruction and selects the pilot frequency;
when the pilot frequency electric signal flows through Re and Rc, the industrial personal computer records the number U of the frequency-selecting voltmetery1；
The industrial personal computer sends a second instruction, and the second instruction is used for indicating the interference signal generation module to output an interference signal;
the interference signal generation module responds to the received instruction of the second controller and outputs an interference signal;
the industrial personal computer sends a third instruction, and the third instruction is used for indicating the frequency-selecting voltmeter to select the frequency of the interference signal;
the frequency selection voltmeter responds to the received third control instruction and selects the frequency of the interference signal;
when the interference signal acts on Re and Rc, the industrial personal computer records the number U of the frequency-selecting voltmeterg；
The industrial personal computer sends a fourth instruction, the fourth instruction is used for indicating the frequency-selecting voltmeter to select the frequency of the pilot frequency electric signal, and the industrial personal computer records the number U of the frequency-selecting voltmetery2；
According to the Uy1、Uy2And UgAnd generating an interference result.
6. The method of claim 5, wherein the Uy is based on the performance of interference rejection1、Uy2And UgThe step of generating the interference result comprises:
calculating a ratio of said Uy1And said Uy2Absolute value of difference and Uy1The ratio is stored in the industrial personal computer;
calculating the signal-to-noise ratio which is the Uy1And said UgThe ratio of (A) to (B) and storing the ratio in the industrial personal computer;
if the ratio is less than or equal to 5%, the interference result is qualified;
and if the ratio is more than 5%, the interference result is unqualified.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007013757A1 (en) * | 2007-03-22 | 2008-09-25 | Rohde & Schwarz Gmbh & Co. Kg | Method and measuring device for measuring emissions with active carrier suppression |
| CN102087331A (en) * | 2010-12-14 | 2011-06-08 | 四川电力试验研究院 | Pilot frequency heavy-current multifunctional grounding parameter testing system based on variable frequency power supply |
| CN102879688A (en) * | 2012-10-12 | 2013-01-16 | 宁波市鄞州供电局 | Test system for grounding grid |
| CN203572883U (en) * | 2013-05-13 | 2014-04-30 | 上海大帆电气设备有限公司 | Novel intelligent frequency-conversion large-current grounding impedance measuring instrument |
| CN106054093A (en) * | 2016-05-25 | 2016-10-26 | 国网辽宁省电力有限公司电力科学研究院 | Anti-power line interference capability assessment device of grounding device tester |
| CN107831509A (en) * | 2017-11-07 | 2018-03-23 | 上海同耀通信技术有限公司 | A kind of detecting system of interference free performance |
| CN108233873A (en) * | 2016-12-22 | 2018-06-29 | 上海普锐马电子有限公司 | A kind of multi-channel noise simulation generator |
| CN109964134A (en) * | 2017-10-23 | 2019-07-02 | 深圳市汇顶科技股份有限公司 | The test macro and method of touch control device anti-interference ability |
-
2020
- 2020-08-04 CN CN202010773858.7A patent/CN111736105A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007013757A1 (en) * | 2007-03-22 | 2008-09-25 | Rohde & Schwarz Gmbh & Co. Kg | Method and measuring device for measuring emissions with active carrier suppression |
| CN102087331A (en) * | 2010-12-14 | 2011-06-08 | 四川电力试验研究院 | Pilot frequency heavy-current multifunctional grounding parameter testing system based on variable frequency power supply |
| CN102879688A (en) * | 2012-10-12 | 2013-01-16 | 宁波市鄞州供电局 | Test system for grounding grid |
| CN203572883U (en) * | 2013-05-13 | 2014-04-30 | 上海大帆电气设备有限公司 | Novel intelligent frequency-conversion large-current grounding impedance measuring instrument |
| CN106054093A (en) * | 2016-05-25 | 2016-10-26 | 国网辽宁省电力有限公司电力科学研究院 | Anti-power line interference capability assessment device of grounding device tester |
| CN108233873A (en) * | 2016-12-22 | 2018-06-29 | 上海普锐马电子有限公司 | A kind of multi-channel noise simulation generator |
| CN109964134A (en) * | 2017-10-23 | 2019-07-02 | 深圳市汇顶科技股份有限公司 | The test macro and method of touch control device anti-interference ability |
| CN107831509A (en) * | 2017-11-07 | 2018-03-23 | 上海同耀通信技术有限公司 | A kind of detecting system of interference free performance |
Non-Patent Citations (4)
| Title |
|---|
| 李衣长等: "电站大地网接地电阻检测技术研究", 《建筑电气》 * |
| 毕海涛等: "接地装置测试仪抗工频干扰能力测试分析", 《东北电力技术》 * |
| 阮启运等: "接地网接地阻抗异频测试装置研制", 《华北电力技术》 * |
| 龚成龙: "异频法测量某钢铁厂65MW高炉煤气高效发电站接地电阻的研究", 《化学工程与装备》 * |
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Application publication date: 20201002 |