CN113640724A - Composite error testing method and system for three-phase zero-sequence current sensor - Google Patents
Composite error testing method and system for three-phase zero-sequence current sensor Download PDFInfo
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
- G01R35/007—Standards or reference devices, e.g. voltage or resistance standards, "golden references"
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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
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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Abstract
The application discloses a composite error testing method and system for a three-phase zero-sequence current sensor. According to typical design parameters of a 10kV alternating current sensor of a power distribution network, rated primary current of the current sensor is determined to be 600A, rated primary zero-sequence current is determined to be 20A, and an accurate value coefficient is 10; by simulating two-phase short circuit, when the composite error is carried out, and the current passing through the zero-sequence current sensor is far less than 20A when the current not less than 6000A is introduced at one time; and respectively measuring the composite errors of the A phase, the B phase and the C phase of the three-phase zero-sequence current sensor.
Description
Technical Field
The application relates to the technical field of power systems, in particular to a composite error testing method and system for a three-phase zero-sequence current sensor.
Background
When the distribution network has a fault, the primary short-circuit current is dozens of times of rated current, at the moment, the current sensor can accurately provide a primary large-current signal to the terminal of the distribution network, and the accuracy of the composite error of the current sensor directly relates to whether the relay protection device can act correctly, so that the safety and the stability of the distribution network system are influenced. Therefore, the reliability of the relay protection of the distribution network terminal is determined by the composite error performance of the current sensor.
Three-phase zero-sequence current sensors are generally adopted in the distribution network to measure each phase current and zero-sequence current. In the three-phase zero-sequence current transformer composite error test, the conventional method is that the primary current is stably increased to the product of the rated primary current and the rated protection limit current accurate value coefficient, and the composite error test is respectively carried out on each phase of the current sensor. According to the general requirement of the current sensor accurate value coefficient, when a composite error test is carried out in a distribution network system, the primary current passing through the current sensor reaches kA, and the current passing through the zero-sequence magnetic flux is overlarge and reaches hundreds of times of the rated primary zero-sequence current, so that the zero-sequence iron core saturated sampling resistance current is overhigh and damaged. If the limit value of the rated primary current of the three phases is applied, a large power source is needed, and the unbalance degree of the three phases is ensured to be smaller than 1.5%, so that the equipment investment is high.
Disclosure of Invention
The embodiment of the disclosure provides a method and a system for testing a composite error of a three-phase zero-sequence current sensor, which are used for at least solving the technical problem of higher equipment investment caused by a mode of stably increasing a primary current to a product of a rated primary current and a rated protection limit current accurate value coefficient and respectively carrying out a composite error test on each phase of the current sensor in the prior art.
According to an aspect of the embodiments of the present disclosure, there is provided a composite error testing method for a three-phase zero-sequence current sensor, including: according to typical design parameters of a 10kV alternating current sensor of a power distribution network, rated primary current of the current sensor is determined to be 600A, rated primary zero-sequence current is determined to be 20A, and an accurate value coefficient is 10; by simulating two-phase short circuit, when the composite error is carried out, and the current passing through the zero-sequence current sensor is far less than 20A when the current not less than 6000A is introduced at one time; and respectively measuring the composite errors of the A phase, the B phase and the C phase of the three-phase zero-sequence current sensor.
According to another aspect of the embodiments of the present disclosure, there is also provided a three-phase zero-sequence current sensor composite error testing system, including: the parameter determining module is used for determining the rated primary current of the current sensor to be 600A, the rated primary zero-sequence current to be 20A and the accuracy value coefficient to be 10 according to typical design parameters of the 10kV alternating current sensor of the power distribution network; the simulation two-phase short circuit module is used for simulating two-phase short circuit, and when a composite error is carried out and current not less than 6000A is introduced at one time, the current passing through the zero-sequence current sensor is far less than 20A; and the composite error measuring module is used for respectively measuring composite errors of the A phase, the B phase and the C phase of the three-phase zero-sequence current sensor.
In the invention, the condition of two-phase short circuit is simulated by the phase sequence measuring method of the composite error of the phase-to-zero sequence current sensor, and only single-phase current is applied to the primary side and flows in from one phase and flows out from the other phase, so that the zero-sequence current synthesized by the primary current is approximate to zero. And the technical problem of higher equipment investment caused by the mode that the primary current is stably increased to the product of the rated primary current and the rated protection limit current accurate value coefficient and the composite error test is respectively carried out on each phase of the current sensor in the prior art is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the disclosure and together with the description serve to explain the disclosure and not to limit the disclosure. In the drawings:
fig. 1 is a schematic flowchart of a composite error testing method for a three-phase zero-sequence current sensor according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a circuit for measuring a composite error between the A-phase and the B-phase according to an embodiment of the disclosure;
FIG. 3 is a schematic diagram of a circuit for measuring a C-phase composite error from a C-phase input current, a B-phase output current, according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of a composite error testing system for a three-phase zero-sequence current sensor according to an embodiment of the present disclosure.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
According to a first aspect of the present embodiment, a composite error testing method 100 for a three-phase zero-sequence current sensor is provided. Referring to fig. 1, the method 100 includes:
s102, according to typical design parameters of a 10kV alternating current sensor of the power distribution network, determining the rated primary current of the current sensor to be 600A, the rated primary zero-sequence current to be 20A and the accurate value coefficient to be 10;
s104, simulating two-phase short circuit, and when a composite error is carried out and current not less than 6000A is introduced once, enabling the current passing through the zero-sequence current sensor to be far less than 20A;
and S106, respectively measuring the composite errors of the A phase, the B phase and the C phase of the three-phase zero-sequence current sensor.
Specifically, the three-phase zero sequence current sensor complex error testing instrument comprises a single-phase current source, a current booster, a standard current transformer and a complex error checking instrument. The single-phase current source can provide single-phase current of 30A-1200A, and the primary current can be increased to the target current through the current booster.
According to typical design parameters of a 10kV alternating current sensor of a power distribution network, rated primary current of the current sensor is set to be 600A, rated primary zero-sequence current is set to be 20A, an accuracy value coefficient is 10, when composite error is carried out, under the condition of simulating two-phase short circuit, when current not less than 6000A is introduced for one time, the current passing through the zero-sequence current sensor is far less than 20A, the sampling resistance of the zero-sequence current sensor cannot be damaged, and composite errors of A phase, B phase and C phase of the three-phase zero-sequence current sensor are measured respectively.
Referring to fig. 2 and 3, taking the measurement of the composite error of the a phase as an example, the primary loop is a phase a, a current of not less than 6000A is introduced, the current flows out of the phase B, the resultant zero-sequence current passing through the zero-sequence current sensor is very small, the secondary terminal of the phase a sensor and the phase a standard are connected to the composite error check meter, and the composite error of the phase a is measured. When the B-phase composite error is measured, the primary side wiring is unchanged, only the phase sequence accessed to the standard terminal of the composite error check meter needs to be changed, and the B-phase secondary terminal is accessed to the composite error check meter. When the composite error of the C phase is measured, the test current not less than 6000A is introduced from the C phase for one time and flows out from the B phase, the C phase is connected to the standard input terminal of the calibrator in a standard mode, the B phase is connected to the secondary output terminal of the calibrator in a standard mode, and the secondary end of the C phase is connected to the composite error calibrator to measure the composite error of the C phase.
Therefore, the condition of two-phase short circuit is simulated by the phase sequence measuring method of the composite error of the phase-to-zero sequence current sensor, single-phase current is applied only on the primary side and flows in from one phase and flows out from the other phase, so that the zero sequence current synthesized by the primary current is approximate to zero, and the sampling resistance of the zero sequence current sensor cannot be damaged by measuring the composite error of each phase. And the technical problem of higher equipment investment caused by the mode that the primary current is stably increased to the product of the rated primary current and the rated protection limit current accurate value coefficient and the composite error test is respectively carried out on each phase of the current sensor in the prior art is solved.
Optionally, the method for measuring the composite error of the phase a of the three-phase zero-sequence current sensor includes: and (3) introducing test current from the primary side of the phase A, allowing the phase B to flow out, allowing the phase C not to flow, allowing the phase A to be connected to a standard input terminal of the calibrator, allowing the phase B to be connected to a standard output terminal of the calibrator, allowing the phase A to be connected to a composite error calibrator, and measuring the composite error of the phase A.
Optionally, the method for measuring the composite error of the B phase of the three-phase zero-sequence current sensor includes: and the primary side wiring is unchanged, the test current is introduced from the primary side of the phase A, the phase B flows out, the current is not introduced from the phase C, the input and output connectors of the standard part of the calibrator are switched on the secondary side, the standard output terminal of the calibrator is connected on the phase A, the standard input terminal of the calibrator is connected on the phase B, the secondary output of the phase B is connected to the composite error calibrator, and the composite error of the phase B is measured.
Optionally, the measuring of the composite error of the C phase of the three-phase zero-sequence current sensor includes: and introducing test current from the phase C for the first time, and flowing out from the phase B, wherein the phase C is connected to a standard input terminal of the calibrator in a standard manner, the phase B is connected to a secondary output terminal of the calibrator in a standard manner, and the secondary end of the phase C is connected to the composite error calibrator in a standard manner, so as to measure the composite error of the phase C.
Therefore, the condition of two-phase short circuit is simulated by the phase sequence measuring method of the composite error of the phase-to-zero sequence current sensor, single-phase current is applied only on the primary side and flows in from one phase and flows out from the other phase, so that the zero sequence current synthesized by the primary current is approximate to zero, and the sampling resistance of the zero sequence current sensor cannot be damaged by measuring the composite error of each phase. And the technical problem of higher equipment investment caused by the mode that the primary current is stably increased to the product of the rated primary current and the rated protection limit current accurate value coefficient and the composite error test is respectively carried out on each phase of the current sensor in the prior art is solved.
According to another aspect of the present embodiment, a three-phase zero-sequence current sensor composite error testing system 400 is also provided. The system 400 includes: the parameter determining module 410 is used for determining the rated primary current of the current sensor to be 600A, the rated primary zero-sequence current to be 20A and the accuracy value coefficient to be 10 according to typical design parameters of the 10kV alternating current sensor of the power distribution network; the simulation two-phase short circuit module 420 is used for simulating two-phase short circuit, and when a composite error is carried out and current not less than 6000A is introduced at one time, the current passing through the zero-sequence current sensor is far less than 20A; and a composite error measuring module 430 for measuring composite errors of the phase a, the phase B and the phase C of the three-phase zero-sequence current sensor respectively.
Optionally, a measure compound error module 430, comprising: and the submodule for measuring the A-phase composite error is used for introducing test current from the primary side of the A-phase, allowing the B-phase to flow out, allowing the C-phase not to flow, allowing the A-phase standard to be connected to a standard input terminal of the calibrator, allowing the B-phase standard to be connected to a standard output terminal of the calibrator, allowing the A-phase secondary output to be connected to the composite error calibrator, and measuring the A-phase composite error.
Optionally, a measure compound error module 430, comprising: and the submodule for measuring the composite error of the phase B is used for enabling the primary side wiring to be unchanged, enabling the test current to be conducted from the primary side of the phase A, enabling the phase B to flow out, enabling the phase C to be not conducted, switching the secondary side to be connected with an input connector and an output connector of a standard part of the calibrator, enabling the phase A to be connected with a standard output terminal of the calibrator, enabling the phase B to be connected with a standard input terminal of the calibrator, enabling the secondary output of the phase B to be connected with the composite error calibrator, and measuring the composite error of the phase B.
Optionally, a measure compound error module 430, comprising: and the submodule for measuring the composite error of the C phase is used for introducing test current from the C phase once and flowing out from the B phase, the C phase standard is connected to a standard input terminal of the calibrator, the B phase standard is connected to a secondary output terminal of the calibrator, and the secondary end of the C phase is connected to the composite error calibrator to measure the composite error of the C phase.
The composite error testing system 400 for the three-phase zero-sequence current sensor according to the embodiment of the present invention corresponds to the composite error testing method 100 for the three-phase zero-sequence current sensor according to another embodiment of the present invention, and is not described herein again.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein. The scheme in the embodiment of the application can be implemented by adopting various computer languages, such as object-oriented programming language Java and transliterated scripting language JavaScript.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (8)
1. A composite error testing method for a three-phase zero-sequence current sensor is characterized by comprising the following steps:
according to typical design parameters of a 10kV alternating current sensor of a power distribution network, rated primary current of the current sensor is determined to be 600A, rated primary zero-sequence current is determined to be 20A, and an accurate value coefficient is 10;
by simulating two-phase short circuit, when the composite error is carried out, and the current passing through the zero-sequence current sensor is far less than 20A when the current not less than 6000A is introduced at one time;
and respectively measuring the composite errors of the A phase, the B phase and the C phase of the three-phase zero-sequence current sensor.
2. The method of claim 1, wherein measuring the composite error of the three-phase zero-sequence current sensor phase a comprises:
and (3) introducing test current from the primary side of the phase A, allowing the phase B to flow out, allowing the phase C not to flow, allowing the phase A to be connected to a standard input terminal of the calibrator, allowing the phase B to be connected to a standard output terminal of the calibrator, allowing the phase A to be connected to a composite error calibrator, and measuring the composite error of the phase A.
3. The method of claim 1, wherein measuring the composite error of the B-phase of the three-phase zero-sequence current sensor comprises:
and the primary side wiring is unchanged, the test current is introduced from the primary side of the phase A, the phase B flows out, the current is not introduced from the phase C, the input and output connectors of the standard part of the calibrator are switched on the secondary side, the standard output terminal of the calibrator is connected on the phase A, the standard input terminal of the calibrator is connected on the phase B, the secondary output of the phase B is connected to the composite error calibrator, and the composite error of the phase B is measured.
4. The method of claim 1, wherein measuring the composite error of the C-phase of the three-phase zero-sequence current sensor comprises:
and introducing test current from the phase C for the first time, and flowing out from the phase B, wherein the phase C is connected to a standard input terminal of the calibrator in a standard manner, the phase B is connected to a secondary output terminal of the calibrator in a standard manner, and the secondary end of the phase C is connected to the composite error calibrator in a standard manner, so as to measure the composite error of the phase C.
5. The utility model provides a three-phase zero sequence current sensor composite error test system which characterized in that includes:
the parameter determining module is used for determining the rated primary current of the current sensor to be 600A, the rated primary zero-sequence current to be 20A and the accuracy value coefficient to be 10 according to typical design parameters of the 10kV alternating current sensor of the power distribution network;
the simulation two-phase short circuit module is used for simulating two-phase short circuit, and when a composite error is carried out and current not less than 6000A is introduced at one time, the current passing through the zero-sequence current sensor is far less than 20A;
and the composite error measuring module is used for respectively measuring composite errors of the A phase, the B phase and the C phase of the three-phase zero-sequence current sensor.
6. The system of claim 5, wherein the measure compound error module comprises:
and the submodule for measuring the A-phase composite error is used for introducing test current from the primary side of the A-phase, allowing the B-phase to flow out, allowing the C-phase not to flow, allowing the A-phase standard to be connected to a standard input terminal of the calibrator, allowing the B-phase standard to be connected to a standard output terminal of the calibrator, allowing the A-phase secondary output to be connected to the composite error calibrator, and measuring the A-phase composite error.
7. The system of claim 5, wherein the measure compound error module comprises:
and the submodule for measuring the composite error of the phase B is used for enabling the primary side wiring to be unchanged, enabling the test current to be conducted from the primary side of the phase A, enabling the phase B to flow out, enabling the phase C to be not conducted, switching the secondary side to be connected with an input connector and an output connector of a standard part of the calibrator, enabling the phase A to be connected with a standard output terminal of the calibrator, enabling the phase B to be connected with a standard input terminal of the calibrator, enabling the secondary output of the phase B to be connected with the composite error calibrator, and measuring the composite error of the phase B.
8. The system of claim 5, wherein the measure compound error module comprises:
and the submodule for measuring the composite error of the C phase is used for introducing test current from the C phase once and flowing out from the B phase, the C phase standard is connected to a standard input terminal of the calibrator, the B phase standard is connected to a secondary output terminal of the calibrator, and the secondary end of the C phase is connected to the composite error calibrator to measure the composite error of the C phase.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5301121A (en) * | 1991-07-11 | 1994-04-05 | General Electric Company | Measuring electrical parameters of power line operation, using a digital computer |
| US20160276969A1 (en) * | 2015-03-20 | 2016-09-22 | Delphi Technologies, Inc. | Electric motor driver with current sensor error correction |
| CN108446441A (en) * | 2018-02-11 | 2018-08-24 | 中国电力科学研究院有限公司 | A kind of analogue system for analog current mutual inductor short trouble |
| CN109490813A (en) * | 2018-12-06 | 2019-03-19 | 国网四川省电力公司电力科学研究院 | A kind of current transformer characteristic appraisal procedure and system |
| CN112068063A (en) * | 2020-09-15 | 2020-12-11 | 国电大渡河深溪沟水电有限公司 | Optical current transformer test system and test method |
| CN113093083A (en) * | 2021-03-24 | 2021-07-09 | 中国电力科学研究院有限公司 | Method and system for testing transient performance of current transformer for direct-current engineering direct-current field |
-
2021
- 2021-07-15 CN CN202110799449.9A patent/CN113640724B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5301121A (en) * | 1991-07-11 | 1994-04-05 | General Electric Company | Measuring electrical parameters of power line operation, using a digital computer |
| US20160276969A1 (en) * | 2015-03-20 | 2016-09-22 | Delphi Technologies, Inc. | Electric motor driver with current sensor error correction |
| CN108446441A (en) * | 2018-02-11 | 2018-08-24 | 中国电力科学研究院有限公司 | A kind of analogue system for analog current mutual inductor short trouble |
| CN109490813A (en) * | 2018-12-06 | 2019-03-19 | 国网四川省电力公司电力科学研究院 | A kind of current transformer characteristic appraisal procedure and system |
| CN112068063A (en) * | 2020-09-15 | 2020-12-11 | 国电大渡河深溪沟水电有限公司 | Optical current transformer test system and test method |
| CN113093083A (en) * | 2021-03-24 | 2021-07-09 | 中国电力科学研究院有限公司 | Method and system for testing transient performance of current transformer for direct-current engineering direct-current field |
Non-Patent Citations (4)
| Title |
|---|
| LIU BIN: "calculation method of composite error for electronic current transformers based on rowgowski coil", 《HIGH VOLTAGE ENGINEERING》, pages 2391 - 2397 * |
| 杨桂平, 《电力电容器与无功补偿》, pages 1 - 6 * |
| 毛安澜: "适用高寒地区电子式互感器校准***的研究与实现", 《高压电器》, pages 1 - 8 * |
| 袁起: "继保专用电流互感器特性参数的认识与分析", 《广东水利电力职业技术学院学报》, pages 1 - 5 * |
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