CN103825241A - Method for automatically obtaining zero order parameters of power grid elements - Google Patents
Method for automatically obtaining zero order parameters of power grid elements Download PDFInfo
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- CN103825241A CN103825241A CN201410101152.0A CN201410101152A CN103825241A CN 103825241 A CN103825241 A CN 103825241A CN 201410101152 A CN201410101152 A CN 201410101152A CN 103825241 A CN103825241 A CN 103825241A
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- zero sequence
- sequence parameter
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Abstract
The invention discloses a method for automatically obtaining zero order parameters of power grid elements. The method comprises the following steps of (1) timely and automatically obtaining zero order parameters from a relay protection setting value off-line setting database, specifically, configuring an output program on the relay protection setting value off-line setting database, periodically outputting zero order parameter data files from the database, and storing the zero order parameter data files locally; (2) invoking an FTP command to update the zero order parameter data files to a server appointed by a safe III area; (3) after a reverse isolation device detects the update of the files, automatically triggering to transmit the files to a relay protection setting value online verification system data server arranged in a safe II area; (4) inputting the zero order parameter data into the database by the relay protection setting value online verification system. According to the method for automatically obtaining the zero order parameters of the power grid elements, which is disclosed by the invention, the obtaining of the zero order parameters of the power grid elements from the relay protection setting value off-line setting database and the execution of a verification computation operation are capable of being fully automatically realized, so that the maintenance workload is reduced; the zero order parameter data files of the power grid elements is capable of being obtained over the safe areas.
Description
Technical field
The invention belongs to field of relay protection in power, more particularly the present invention relates to a kind of automatic obtaining method of electric network element Zero sequence parameter.
Background technology
Traditional relay protection fixed value setting computational methods are on the normal mode basis of operation of power networks, according to the day-to-day operation rule of electrical network, the usual manner of considering protective device perimeter circuit and plant stand changes, determine the harshest mode, by guaranteeing that under the harshest mode, definite value meets " four property " (reliability, quick-action, sensitivity and selectivity) requirement determine protection definite value, and the line that returns back out of the same transformer station causing for capital construction or electric network reconstruction project is stopped transport more simultaneously, the special operational modes such as large power plant full cut-off, have little time to check the definite value of protective relaying device around.Obviously, arrange once the operational mode of system has exceeded daily mode, exceeded the limit of consideration of off-line setting calculation mode, just may have the accident potential of protection malfunction or tripping, the coverage that causes the accident expands, and then may cause electrical network major accident.In recent years, along with the fast development of electrical network, electrical network capital construction, power supply are sent, electric network reconstruction project is gone into operation in a large number, and relay protection fixed value setting evaluation work can not meet the requirement of its production cycle.In capital construction, technological transformation project operation process; the bus causing accompany stop, circuit is accompanied the mode of stopping, electrical network abscission ring mode becomes increasingly complex; electrical network abnormal running mode showed increased, the time extends more, has brought huge challenge to current relay protection fixed value setting evaluation work.Therefore, increasing experts and scholars online check, the on-line tuning of relay protection constant value that begin one's study.
China's patent application number is the real-time running data that " electric grid relay protection constant value on-line check integrated data processing method " that 200810147821.2 " relay protection on-line check method for electric grid system " and application number are 200810147822.7 proposed to obtain from electrical network by EMS and DTS power equipment parameter and electrical network; then carry out calculation of fault according to the protection rules of adjusting, finally according to checking rule, protection definite value is checked.But above-mentioned patented method does not relate to the data-interface of online relay setting check system and existing relay protection constant value off-line setting calculation system, do not relate to the automatic obtaining method of electric network element Zero sequence parameter.
Generally, relay protection constant value on-line check system layout is in safe II district, and relay protection constant value off-line setting calculation system layout is in safe III district, and WangII district of CongIII district transmits file need to pass safety insulating device.Therefore prior art does not overcome the above problems.
Summary of the invention
The object of the invention is: the automatic obtaining method that a kind of electric network element Zero sequence parameter is provided; timing automatic is obtained circuit, transformer Zero sequence parameter and circuit zero-sequence mutual inductance data from relay protection constant value off-line setting calculation database, carries out relay protection constant value on-line check evaluation work.
Technical solution of the present invention is: a kind of automatic obtaining method of electric network element Zero sequence parameter, comprises the steps:
(1) timing automatic is obtained Zero sequence parameter from relay protection constant value off-line setting calculation database, specifically refers to configure derivation program on relay protection constant value off-line setting calculation database server, periodically derives Zero sequence parameter data file from database, is stored in this locality;
(2) call FTP order Zero sequence parameter data file is uploaded to the server that safe III district specifies;
(3) reverse isolation device detects after file update, automatically triggers and is pushed to the relay protection constant value on-line check system data server that is positioned at safe II district;
(4) database is arrived in Zero sequence parameter data importing by relay protection constant value on-line check system.
Further, the Zero sequence parameter that described step (1) is obtained from relay protection constant value off-line setting calculation database comprises line zero order parameter, transformer Zero sequence parameter and circuit zero-sequence mutual inductance parameter; Described line zero order parameter comprises zero sequence resistance, zero sequence reactance, zero sequence susceptance; Described transformer Zero sequence parameter can be two-winding transformer Zero sequence parameter or three-winding transformer Zero sequence parameter, wherein said two-winding transformer Zero sequence parameter comprises zero sequence reactance, and described three-winding transformer Zero sequence parameter comprises high, medium and low voltage side zero sequence reactance; Described circuit zero-sequence mutual inductance parameter comprises percentage, zero sequence mutual resistance and the zero sequence mutual reactance of the first node of mutual inductance part end-to-end distance circuit on percentage apart from mutual inductance part head end on the percentage of the first node of mutual inductance part end-to-end distance circuit on the percentage of the first node of circuit, circuit 1, circuit 2 apart from the first node of circuit of mutual inductance part head end on circuit 1, circuit 2; The essential information that comprises electric network element in described Zero sequence parameter data file, comprises element title, electric pressure, the multiple information of affiliated plant stand.
Further, in described step (2), call FTP order and specifically refer to: Zero sequence parameter data file is uploaded in program Automatically invoked FTP order, or uploads manually.
Further, the mode that adopts when reverse isolation device pushing files described in described step (3) timing to push or push immediately.
Further, described step (4) relay protection constant value on-line check system imports to Zero sequence parameter before database, first confirms according to the time tag of the first row of data file whether described Zero sequence parameter data have renewal, has the time of renewal to trigger importing again.
Further, the supplemental characteristic file of described derivation also comprises the positive order parameter of electric network element, compares for the parameter of relay protection constant value on-line check system and relay protection constant value off-line setting calculation system.
The invention has the beneficial effects as follows: can automatically obtain electric network element Zero sequence parameter from relay protection constant value off-line setting calculation database and carry out check evaluation work, reduce maintenance workload; Can obtain electric network element Zero sequence parameter data file in cross-safety zone.
Accompanying drawing explanation
Fig. 1 is the flow chart of a preferred embodiment of the inventive method.
Embodiment
Below in conjunction with accompanying drawing 1, the inventive method embodiment is described in detail.
What in figure, step 1 was described is that timing automatic is obtained Zero sequence parameter from relay protection constant value off-line setting calculation database; on relay protection constant value off-line setting calculation database server, configure derivation program; periodically derive Zero sequence parameter data file from database, be stored in this locality.The Zero sequence parameter obtaining from relay protection constant value off-line setting calculation database comprises line zero order parameter, transformer Zero sequence parameter and circuit zero-sequence mutual inductance parameter.Line zero order parameter comprises zero sequence resistance, zero sequence reactance, zero sequence susceptance.Two-winding transformer Zero sequence parameter comprises zero sequence reactance.Three-winding transformer Zero sequence parameter comprises high, medium and low voltage side zero sequence reactance.Circuit zero-sequence mutual inductance parameter comprises percentage, zero sequence mutual resistance and the zero sequence mutual reactance of the first node of mutual inductance part end-to-end distance circuit on percentage apart from mutual inductance part head end on the percentage of the first node of mutual inductance part end-to-end distance circuit on the percentage of the first node of circuit, circuit 1, circuit 2 apart from the first node of circuit of mutual inductance part head end on circuit 1, circuit 2.In Zero sequence parameter file, comprise the essential information of electric network element, comprise element title, electric pressure and affiliated power plant and substation's information, be convenient to mate associated with electrical network primary equipment.
What in figure, step 2 was described is to call FTP order Zero sequence parameter data file is uploaded to the server that safe III district specifies, ftp server IP address, user name, the password that can specify safe III district by revising configuration file, which file file storage directory, all need to upload.
What in figure, step 3 was described is that reverse isolation device detects after file update, automatically triggers and is pushed to the relay protection constant value on-line check system data server that is positioned at safe II district.The mode that adopts timing to push or push immediately when reverse isolation device pushing files.
What in figure, step 4 was described is that Zero sequence parameter is imported to database by relay protection constant value on-line check system.Relay protection constant value on-line check system imports to Zero sequence parameter before database, first confirms according to the time tag of the first row of data file whether Zero sequence parameter data have renewal, has the time of renewal to trigger importing again.
Claims (6)
1. an automatic obtaining method for electric network element Zero sequence parameter, is characterized in that comprising the steps:
(1) timing automatic is obtained Zero sequence parameter from relay protection constant value off-line setting calculation database, specifically refers to configure derivation program on relay protection constant value off-line setting calculation database server, periodically derives Zero sequence parameter data file from database, is stored in this locality;
(2) call FTP order Zero sequence parameter data file is uploaded to the server that safe III district specifies;
(3) reverse isolation device detects after file update, automatically triggers and is pushed to the relay protection constant value on-line check system data server that is positioned at safe II district;
(4) database is arrived in Zero sequence parameter data importing by relay protection constant value on-line check system.
2. the automatic obtaining method of a kind of electric network element Zero sequence parameter according to claim 1, is characterized in that: the Zero sequence parameter that described step (1) is obtained from relay protection constant value off-line setting calculation database comprises line zero order parameter, transformer Zero sequence parameter and circuit zero-sequence mutual inductance parameter; Described line zero order parameter comprises zero sequence resistance, zero sequence reactance, zero sequence susceptance; Described transformer Zero sequence parameter can be two-winding transformer Zero sequence parameter or three-winding transformer Zero sequence parameter, wherein said two-winding transformer Zero sequence parameter comprises zero sequence reactance, and described three-winding transformer Zero sequence parameter comprises high, medium and low voltage side zero sequence reactance; Described circuit zero-sequence mutual inductance parameter comprises percentage, zero sequence mutual resistance and the zero sequence mutual reactance of the first node of mutual inductance part end-to-end distance circuit on percentage apart from mutual inductance part head end on the percentage of the first node of mutual inductance part end-to-end distance circuit on the percentage of the first node of circuit, circuit 1, circuit 2 apart from the first node of circuit of mutual inductance part head end on circuit 1, circuit 2; The essential information that comprises electric network element in described Zero sequence parameter data file, comprises element title, electric pressure, the multiple information of affiliated plant stand.
3. the automatic obtaining method of a kind of electric network element Zero sequence parameter according to claim 1, it is characterized in that: in described step (2), call FTP order and specifically refer to: Zero sequence parameter data file is uploaded in program Automatically invoked FTP order, or uploads manually.
4. the automatic obtaining method of a kind of electric network element Zero sequence parameter according to claim 1, is characterized in that: the mode that adopts timing to push when reverse isolation device pushing files described in described step (3) or push immediately.
5. the automatic obtaining method of a kind of electric network element Zero sequence parameter according to claim 1; it is characterized in that: described step (4) relay protection constant value on-line check system imports to Zero sequence parameter before database; first confirm according to the time tag of the first row of data file whether described Zero sequence parameter data have renewal, have the time of renewal to trigger again importing.
6. the automatic obtaining method of a kind of electric network element Zero sequence parameter according to claim 2; it is characterized in that: the supplemental characteristic file of described derivation also comprises the positive order parameter of electric network element, compare for the parameter of relay protection constant value on-line check system and relay protection constant value off-line setting calculation system.
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Cited By (3)
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| CN104052016A (en) * | 2014-07-14 | 2014-09-17 | 深圳市国电南思系统控制有限公司 | Fixed value modification method and equipment based on purson system and fixed value setting system |
| CN107506443A (en) * | 2017-08-25 | 2017-12-22 | 国网辽宁省电力有限公司 | A kind of cross-platform intelligent data transmission method |
| CN113852039A (en) * | 2021-06-16 | 2021-12-28 | 许继电气股份有限公司 | Method and device for loading direct current protection constant value in batch on line |
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| CN104052016A (en) * | 2014-07-14 | 2014-09-17 | 深圳市国电南思系统控制有限公司 | Fixed value modification method and equipment based on purson system and fixed value setting system |
| CN104052016B (en) * | 2014-07-14 | 2017-01-11 | 深圳市国电南思系统控制有限公司 | Fixed value modification method and equipment based on purson system and fixed value setting system |
| CN107506443A (en) * | 2017-08-25 | 2017-12-22 | 国网辽宁省电力有限公司 | A kind of cross-platform intelligent data transmission method |
| CN113852039A (en) * | 2021-06-16 | 2021-12-28 | 许继电气股份有限公司 | Method and device for loading direct current protection constant value in batch on line |
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Effective date of registration: 20220221 Address after: No.17 Binhe Road, Nanming District, Guiyang City, Guizhou Province Patentee after: Guizhou Power Grid Co.,Ltd. Address before: No. 45, Zhongshan Middle Road, Liupanshui City, Guizhou Province 553001 Patentee before: LIUPANSHUI POWER SUPPLY BUREAU, GUIZHOU GRID CO.,LTD. Patentee before: Nanjing Nan relic Electric Co., Ltd. |