CN111308152B - Protection method and system compatible with different types of mutual inductors - Google Patents
Protection method and system compatible with different types of mutual inductors Download PDFInfo
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- CN111308152B CN111308152B CN202010272709.2A CN202010272709A CN111308152B CN 111308152 B CN111308152 B CN 111308152B CN 202010272709 A CN202010272709 A CN 202010272709A CN 111308152 B CN111308152 B CN 111308152B
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- measurement
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- mutual inductor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
- G01R15/183—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using transformers with a magnetic core
- G01R15/185—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using transformers with a magnetic core with compensation or feedback windings or interacting coils, e.g. 0-flux sensors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/24—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Abstract
The invention discloses a protection method compatible with different types of mutual inductor access, which comprises the following steps: step 1, formulating a measuring point access position table, and specifying the position of each measuring point accessed from a measuring interface device or from a merging unit, wherein the measuring points are optical transformers or non-optical transformers; step 2, receiving the data packet sent upwards through a corresponding receiving way based on the measuring point access position table; step 3, configuring a settable parameter, and setting a transformer attribute parameter value of each measuring point according to the actual engineering situation; and 4, selecting a data source according to the set parameters, and reading the real measurement data of each measurement point. The invention also discloses a protection system compatible with the mutual inductor access of different types, which comprises a measurement interface device, a merging unit and a protection device. The technical scheme can be compatible with the access of different types of mutual inductors under the condition of not changing software and hardware of the protection device.
Description
Technical Field
The invention belongs to the field of relay protection of power systems, and particularly relates to a direct-current power transmission protection system with an access mutual inductor of which the type can be changed.
Background
In the development of the direct-current transmission technology, theoretical principles and engineering application tend to be stable and mature, direct-current protection standardization is provided on the background, software and hardware of related protection devices are required to be not allowed to be randomly modified once being subjected to network access detection, authentication and shaping, and otherwise, the protection loses network access qualification.
Due to the particularity of the direct-current transmission system, the type of the mutual inductor can be changed. For example, the direct current measurement point IDNC in the ± 800kV direct current transmission system is the same, and the optical transformer is adopted in the first project, and is collected by the merging unit and then transmitted to the protection device; and the project B adopts a zero-flux transformer, and the zero-flux transformer is acquired by a measurement interface device and then transmitted to a protection device. Because the data capacity and the transmission protocol of the merging unit and the measurement interface device are different, the protection device needs to be simultaneously suitable for two different projects, namely a project A and a project B under the condition of not changing software and hardware.
At present, an intermediate device is added between a protection device and an acquisition device (i.e., a merging unit and a measurement interface device), and after data of the acquisition device is uniformly accessed to the intermediate device, the data is disassembled by the intermediate device, repackaged to form new data, and finally forwarded to the protection device. The intermediate device has no setting requirement, the software and hardware configuration can be correspondingly changed according to the type of the mutual inductor, and the data transmitted to the protection device is ensured to meet the standard specification requirement. The method can meet the requirement of compatibility, but has the problem that the 'four-property principle' of relay protection is partially violated: firstly, an intermediate device is introduced to increase an intermediate link, so that the reliability of a protection system is inevitably reduced; secondly, the intermediate device has the processes of unpacking, recombining and packing, so that the data transmission delay is additionally increased, and the 'quick action' of the protection system is greatly influenced. The invention provides a new solution to the problems of the technical route.
Disclosure of Invention
The invention aims to provide a protection method and a system compatible with different types of mutual inductor access, which can be compatible with different types of mutual inductor access under the condition of not changing software and hardware of a protection device;
in order to achieve the above purpose, the solution of the invention is:
a protection method compatible with different types of mutual inductor access comprises the following steps:
step 2, receiving the data packet sent upwards through a corresponding receiving way based on the measuring point access position table;
step 3, configuring a settable parameter, and setting a transformer attribute parameter value of each measuring point according to the actual engineering situation;
and 4, selecting a data source according to the set parameters, and reading the real measurement data of each measurement point.
In the step 1, the non-optical transformer is an electromagnetic non-optical transformer or a zero-flux non-optical transformer.
In step 2, the measurement point receives the data packet sent by the measurement interface device or the merging unit.
In step 3, the transformer attribute parameter values include data source information of each measurement point.
In the step 4, according to the set parameters, if a certain measurement point is the measurement interface type attribute, selecting corresponding data in the measurement interface device as real data of the measurement point; and if a certain measuring point is the attribute of the merging unit type, selecting the corresponding data in the merging unit as the real data of the measuring point.
A protection system compatible with different types of mutual inductors comprises a measuring interface device, a merging unit and a protection device, wherein an optical mutual inductor or a non-optical mutual inductor is received by the measuring interface device and the merging unit device and then is sent to the protection device; and the protection device selects the measurement data of the measurement interface device or the merging unit based on the transformer attribute of each measurement point according to the set transformer attribute parameters of the measurement points, and outputs the measurement data as the real measurement data of the measurement points.
The protection device includes:
the human-computer interaction module is used for setting the attribute parameters of the mutual inductor at the measuring point;
the measurement data receiving module is used for accessing the measurement interface device and the merging unit and receiving the measurement data sent by the measurement interface device and the merging unit; and the number of the first and second groups,
and the data selection module is used for automatically reading real measurement data from the data transferred by the measurement data receiving module according to the set attribute parameters of the mutual inductor at the measurement point.
After the scheme is adopted, the invention provides the protection system and the method which are compatible with the access of the mutual inductors of different types under the condition of not introducing an intermediate device, the invention does not violate the four-property principle of relay protection, the invention can effectively solve the problem that the protection reliability and the protection speed are reduced due to the scheme of adding the intermediate device in the prior art, improves the overall stability of a power transmission system, and has the characteristics of safety, simplicity, practicability and reliability.
Drawings
FIG. 1 is an overall architecture diagram of the protection system of the present invention;
fig. 2 is a schematic diagram of a data sampling process inside the protection device according to the present invention.
Detailed Description
The technical solution and the advantages of the present invention will be described in detail with reference to the accompanying drawings.
The invention provides a protection method compatible with different types of mutual inductor access, which comprises the steps of firstly counting measurement points of all installed mutual inductors in a direct current transmission system, and dividing the measurement points into two types of signal groups according to the acquisition of a measurement interface device and the acquisition of a merging unit; further, the position of each measuring point in the two signal groups is specified, including the position of an access acquisition device and the position of an uploading protection device; furthermore, aiming at the two signal groups, two sets of redundant receiving paths are configured in the protection device; further, configuring a settable parameter in the protection device, and setting the access type of each measuring point according to the actual engineering situation; further, the protection device automatically selects a data source according to the set parameters, accurately reads real measurement data of each measurement point, and ensures safe and stable operation of the direct current transmission system.
The invention also provides a protection system, the whole structure of which is shown in fig. 1, a position table of each measuring point in the power transmission system accessed from the measuring interface device or the merging unit is respectively established, and all projects are executed according to the position table. When a certain measuring point of the project A is a non-optical mutual inductor and is collected by a measuring interface device, the measuring point is accessed to the corresponding position of the measuring interface device according to the position table and is sent to a protection device after being processed by the measuring interface device; in the second project, if the same measuring point is an optical transformer and is collected by the merging unit, the optical transformer is connected to the corresponding position of the merging unit and is sent to the protection device after being processed by the merging unit.
The protection device comprises a man-machine interaction module, a measured data receiving module and a data selection module, wherein the man-machine interaction module is used for setting mutual inductor attribute parameters of each measuring point in the power transmission project, the measured data receiving module is used for receiving sampling data packets of the measuring interface device and the merging unit by the protection device according to a set rule, and the data selection module reads real measured data from the measured data receiving module according to an attribute value set by the man-machine interaction module for being used by protection logic.
The data sampling process inside the protection device is as shown in fig. 2, and the measured data receiving module receives the data packets sent by the measuring interface device and the merging unit through a predetermined optical port, and transmits the data packets to the data selecting module; an engineer sets transformer attribute parameter values of all measuring points of the total station through a man-machine interaction module, wherein the parameter values comprise data source information of each measuring point; the data selection module selects real measurement data of each measurement point from the data transmitted by the data receiving module according to the attribute parameter values and outputs the real measurement data for subsequent protection logic; that is, if a certain measurement point is the measurement interface type attribute, the data selection module outputs the corresponding data in the selected measurement interface device to the protection device as the real data of the measurement point, and similarly, if the measurement point is the merging unit type attribute, the data selection module outputs the corresponding data in the selected merging unit to the protection device as the real data of the measurement point.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the protection scope of the present invention.
Claims (5)
1. A protection method compatible with different types of mutual inductor access is characterized by comprising the following steps:
step 1, counting all measuring points of a transformer in a direct current transmission system, dividing the measuring points into two signal groups according to the acquisition of a measuring interface device and the acquisition of a merging unit, and defining the access position of each measuring point in the two signal groups, including the position of an access acquisition device and the position of an uploading protection device, so as to form a measuring point access position table, wherein all projects are executed according to the table; the measuring point is an optical transformer or a non-optical transformer, and the acquisition device is a measuring interface device or a merging unit;
step 2, aiming at the two signal groups, two sets of redundant receiving ways are configured in the protection device, and the data packets sent upwards are received through the corresponding receiving ways based on the measuring point access position table;
step 3, configuring a settable parameter, and setting a transformer attribute parameter value of each measuring point according to the actual engineering situation; the transformer attribute parameter values comprise data source information of each measuring point;
step 4, selecting a data source according to the set parameters, and reading real measurement data of each measurement point;
in the step 4, according to the set parameters, if a certain measurement point is a measurement interface type attribute, corresponding data in the measurement interface device is selected as real data of the measurement point; and if a certain measuring point is the attribute of the merging unit type, selecting the corresponding data in the merging unit as the real data of the measuring point.
2. The protection method compatible with different types of mutual inductor accesses according to claim 1, characterized in that: in the step 1, the non-optical mutual inductor adopts an electromagnetic non-optical mutual inductor or a zero-flux non-optical mutual inductor.
3. A protection method compatible with different types of mutual inductor accesses according to claim 1 or 2, characterized in that: in step 2, the measuring point receives the data packet sent by the measuring interface device or the merging unit.
4. A protection system compatible with different types of mutual inductor accesses, to which the protection method compatible with different types of mutual inductor accesses of any one of claims 1 to 3 is applied, characterized in that: the protection system comprises a measurement interface device, a merging unit and a protection device, wherein an optical mutual inductor or a non-optical mutual inductor is received by the measurement interface device and the merging unit device and then is sent to the protection device; and the protection device selects the measurement data of the measurement interface device or the merging unit based on the transformer attribute of each measurement point according to the set transformer attribute parameters of the measurement points, and outputs the measurement data as the real measurement data of the measurement points.
5. The protection system for compatible access by different types of transformers according to claim 4, characterized in that: the protection device includes:
the human-computer interaction module is used for setting the attribute parameters of the mutual inductor at the measuring point;
the measurement data receiving module is used for accessing the measurement interface device and the merging unit and receiving the measurement data sent by the measurement interface device and the merging unit; and (c) a second step of,
and the data selection module is used for automatically reading real measurement data from the data transferred by the measurement data receiving module according to the set attribute parameters of the mutual inductor at the measurement point.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010272709.2A CN111308152B (en) | 2020-04-09 | 2020-04-09 | Protection method and system compatible with different types of mutual inductors |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010272709.2A CN111308152B (en) | 2020-04-09 | 2020-04-09 | Protection method and system compatible with different types of mutual inductors |
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| CN111308152A CN111308152A (en) | 2020-06-19 |
| CN111308152B true CN111308152B (en) | 2022-08-26 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103354027A (en) * | 2013-06-28 | 2013-10-16 | 许继集团有限公司 | Point-to-multipoint sampling value transmission method and system |
| CN105988064A (en) * | 2015-11-25 | 2016-10-05 | 国网辽宁省电力有限公司锦州供电公司 | Functional meter capable of locating fault point and method used for locating fault point and applied to functional meter |
| CN106253487A (en) * | 2016-09-29 | 2016-12-21 | 北京东土科技股份有限公司 | It is applied to the intelligent electric power server of intelligent substation Protection control system |
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2020
- 2020-04-09 CN CN202010272709.2A patent/CN111308152B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103354027A (en) * | 2013-06-28 | 2013-10-16 | 许继集团有限公司 | Point-to-multipoint sampling value transmission method and system |
| CN105988064A (en) * | 2015-11-25 | 2016-10-05 | 国网辽宁省电力有限公司锦州供电公司 | Functional meter capable of locating fault point and method used for locating fault point and applied to functional meter |
| CN106253487A (en) * | 2016-09-29 | 2016-12-21 | 北京东土科技股份有限公司 | It is applied to the intelligent electric power server of intelligent substation Protection control system |
Non-Patent Citations (1)
| Title |
|---|
| 电力系统继电保护图形数据一体化的研究;刘为雄等;《中国电力》;20031120(第11期);第78-81页 * |
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