CN113341313B - Method for judging quality of protection action behavior - Google Patents
Method for judging quality of protection action behavior Download PDFInfo
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- CN113341313B CN113341313B CN202110677498.5A CN202110677498A CN113341313B CN 113341313 B CN113341313 B CN 113341313B CN 202110677498 A CN202110677498 A CN 202110677498A CN 113341313 B CN113341313 B CN 113341313B
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- 230000009471 action Effects 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000008569 process Effects 0.000 claims abstract description 11
- 238000005259 measurement Methods 0.000 claims abstract description 8
- 230000009466 transformation Effects 0.000 claims abstract description 5
- 238000012935 Averaging Methods 0.000 claims description 3
- 230000008092 positive effect Effects 0.000 claims description 3
- 230000005856 abnormality Effects 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 230000006399 behavior Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000002633 protecting effect Effects 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
Classifications
-
- 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
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention relates to a method for judging the quality of protection action behavior, which comprises the steps of recording voltage and current quantity input by relay protection through a relay protection measurement and control device, carrying out Fourier transformation on the voltage and current quantity, and extracting fundamental wave and non-fundamental wave components; integrating and calculating the total fault process time of fundamental wave apparent power of current and voltage to obtain A1; integrating and calculating the total fault process time of the full wave apparent power of the current and the voltage, wherein the full wave apparent power comprises fundamental waves and non-fundamental waves, so as to obtain A total; and judging the protection action quality through the ratio of A1 to A total. The invention can automatically identify and analyze the protection action, and determine the action correctness and the integrity of the protection device and the circuit breaker through the collected protection action information and the collected data; the abnormality of the protection and the loop thereof can be found in time; real-time monitoring, online fault discovery, early warning and fault playback.
Description
Technical Field
The invention relates to the technical field of electrified railways, in particular to a method for judging the quality of protection action behaviors.
Background
The current electrified railway technology is developed day by day, and the maintenance work of electric equipment is also increasingly heavy. The traditional means is to perform each test according to the items specified by the test rules according to the period, mainly perform an electric transmission test to verify whether the relay protection action logic is normal, and check whether the device setting, the fixed value, the pressing plate and other configurations are correct so as to determine whether the device has defects.
The fault information system in the current market basically collects fault information directly from the relay protection device and the fault recorder, and determines faults of the power grid through aggregation and analysis, but cannot locate and alarm the faults of the device. In addition, most existing traction substation is not provided with a fault recorder, and the system structure and the load of the existing traction substation are different from those of the traditional substation greatly, so that the fault information system of the traditional power system cannot meet the fault diagnosis requirement of the traction substation.
Disclosure of Invention
Aiming at the special characteristics of the system structure and the load harmonic content of the traction substation, the invention solves the increasingly heavy maintenance problem of electrical equipment of the traction substation, automatically identifies and analyzes the protection action, determines the action correctness and the integrity of a protection device and a circuit breaker through collected protection action information and collected data, and can timely discover the abnormality of the protection and the circuit thereof, monitor in real time, discover on-line faults, early warn in advance and play back the faults.
The technical scheme adopted by the invention is as follows:
the method for judging the quality of the protection action behavior is characterized by comprising the following steps of:
The method comprises the following steps:
Recording voltage and current quantity input by relay protection through a relay protection measurement and control device, performing Fourier transformation on the voltage and current quantity, and extracting fundamental wave and non-fundamental wave components;
integrating and calculating the total fault process time of fundamental wave apparent power of current and voltage to obtain A1; integrating and calculating the total fault process time of the full wave apparent power of the current and the voltage, wherein the full wave apparent power comprises fundamental waves and non-fundamental waves, so as to obtain A total; and judging the protection action quality through the ratio of A1 to A total.
The total fault process time is from the current out-of-limit time to the current turn-off time after tripping.
For the protection positive movement conforming to the protection correct movement parameters, the protection movement quality is divided into 100 minutes;
For protection refusal, the total A1/A is more than or equal to 40%, the protection action mass is less than 20 minutes, the total A1/A is more than or equal to 20% and less than 40%, the protection action mass is 20-60 minutes, the total A1/A is less than 20%, and the protection action mass is more than 60 minutes;
For protection misoperation, the total A1/A is more than or equal to 40%, the protection action mass fraction is less than 20 minutes, the total A1/A is more than or equal to 20% and less than 40%, the protection action mass fraction is 20-60 minutes, the total A1/A is less than 20%, and the protection action mass fraction is more than 60 minutes.
And respectively adding the protection action quality scores of the previous protection positive action, the false action and the refused action, and carrying out statistics and averaging to obtain a protection action score which is lower than 80 minutes, wherein the protection quality is unqualified.
The invention has the following advantages:
1. Automatically identifying and analyzing the protection action, and determining the action correctness and the action integrity of the protection device and the circuit breaker through the collected protection action information and the collected data;
2. the abnormality of the protection and the loop thereof can be found in time;
3. Real-time monitoring, online fault discovery, early warning and fault playback.
Drawings
Fig. 1 is a schematic structural diagram of a protection measurement and control system according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of an algorithm for protecting action quality judgment according to an embodiment of the present disclosure;
Fig. 3 is a flowchart of a method for protecting quality judgment of action behavior according to an embodiment of the present disclosure.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
According to the 3.10 requirements in the enterprise standard Q/CR 687-2018 traction power supply system relay protection configuration and setting calculation technology guide of China railway head office, the traction power supply system relay protection device should fully consider the influence factors such as asymmetric components, impact load, harmonic components and the like generated by electrified railway power supply, and take reliable and effective measures to prevent incorrect actions, frequent start and the like. Therefore, the harmonic components are very important factors influencing the accuracy of the protection action, so that fundamental waves and harmonic waves are extracted respectively, and the duty ratio of the fundamental waves and the harmonic waves is used as an important basis for judging the quality of the protection action.
The invention relates to a method for judging the quality of protection action behavior, which comprises the steps of recording voltage and current quantity input by relay protection through a relay protection measurement and control device, carrying out Fourier transformation on the voltage and current quantity, and extracting fundamental wave and non-fundamental wave components; integrating and calculating the total fault process time of fundamental wave apparent power of current and voltage to obtain A1; integrating and calculating the total fault process time of the full wave apparent power of the current and the voltage, wherein the full wave apparent power comprises fundamental waves and non-fundamental waves, so as to obtain A total; and judging the protection action quality through the ratio of A1 to A total.
The relay protection measurement and control device can select WXB-65A from the south of China and other commercial products capable of realizing similar functions, as shown in figure 1, the general relay protection measurement and control device comprises a voltage input signal module, a current input signal module, an action output signal module and a communication interface module, and the voltage input signal, the current input signal and the action output signal of the relay protection measurement and control device are rapidly and synchronously collected, and the voltage quantity and the current quantity of relay protection input are recorded.
The total fault process time is from the current out-of-limit time to the current turn-off time after tripping.
For protection positive movement conforming to the protection correct movement parameters, the protection movement quality is divided into 100 minutes.
For the protection refusal, the total A1/A is more than or equal to 40%, the protection action mass is less than 20 minutes, the total A1/A is more than or equal to 20% and less than 40%, the protection action mass is 20-60 minutes, the total A1/A is less than 20%, and the protection action mass is more than 60 minutes.
For protection misoperation, the total A1/A is more than or equal to 40%, the protection action mass fraction is less than 20 minutes, the total A1/A is more than or equal to 20% and less than 40%, the protection action mass fraction is 20-60 minutes, the total A1/A is less than 20%, and the protection action mass fraction is more than 60 minutes.
And respectively adding the protection action quality scores of the previous protection positive action, the false action and the refused action, and carrying out statistics and averaging to obtain a protection action score which is lower than 80 minutes, wherein the protection quality is unqualified.
The protection fixed value and the event information are read through the communication interface, the specific mass fraction of the protection action can be combined with the specific fault current value, the fault voltage value and the fault time, and the score segmentation is carried out according to the proportion.
The content of the invention is not limited to the examples listed, and any equivalent transformation to the technical solution of the invention that a person skilled in the art can take on by reading the description of the invention is covered by the claims of the invention.
Claims (1)
1. The method for judging the quality of the protection action behavior is characterized by comprising the following steps of:
The method comprises the following steps:
Recording voltage and current quantity input by relay protection through a relay protection measurement and control device, performing Fourier transformation on the voltage and current quantity, and extracting fundamental wave and non-fundamental wave components;
integrating and calculating the total fault process time of fundamental wave apparent power of current and voltage to obtain A1; integrating and calculating the total fault process time of the full wave apparent power of the current and the voltage, wherein the full wave apparent power comprises fundamental waves and non-fundamental waves, so as to obtain A total; judging the protection action quality through the total ratio of A1 to A;
The total fault process time is from the current out-of-limit time to the current turn-off time after tripping;
for the protection positive movement conforming to the protection correct movement parameters, the protection movement quality is divided into 100 minutes;
For protection refusal, the total A1/A is more than or equal to 40%, the protection action mass is less than 20 minutes, the total A1/A is more than or equal to 20% and less than 40%, the protection action mass is 20-60 minutes, the total A1/A is less than 20%, and the protection action mass is more than 60 minutes;
for protection misoperation, the total A1/A is more than or equal to 40%, the protection action mass fraction is less than 20 minutes, the total A1/A is more than or equal to 20% and less than 40%, the protection action mass fraction is 20-60 minutes, the total A1/A is less than 20%, and the protection action mass fraction is more than 60 minutes;
And respectively adding the protection action quality scores of the previous protection positive action, the false action and the refused action, and carrying out statistics and averaging to obtain a protection action score which is lower than 80 minutes, wherein the protection quality is unqualified.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110677498.5A CN113341313B (en) | 2021-06-18 | 2021-06-18 | Method for judging quality of protection action behavior |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110677498.5A CN113341313B (en) | 2021-06-18 | 2021-06-18 | Method for judging quality of protection action behavior |
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| Publication Number | Publication Date |
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| CN113341313A CN113341313A (en) | 2021-09-03 |
| CN113341313B true CN113341313B (en) | 2024-04-30 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6011480A (en) * | 1997-07-23 | 2000-01-04 | Schweitzer Engineering Laboratories, Inc. | Protection quality capability for protective relays used in an electric power system |
| JP2006197679A (en) * | 2005-01-12 | 2006-07-27 | Meidensha Corp | Digital ground fault current protection relay |
| CN101282037A (en) * | 2008-05-19 | 2008-10-08 | 天津大学 | Protection method for heterophase short-circuit of tractive power supply system |
| JP2013243827A (en) * | 2012-05-18 | 2013-12-05 | Toshiba Corp | Protective relay device and power supply circuit |
| CN103605787A (en) * | 2013-12-03 | 2014-02-26 | 国家电网公司 | Method and system for evaluating and analyzing relay protection |
| CN108732444A (en) * | 2018-05-29 | 2018-11-02 | 国网浙江省电力有限公司 | Intelligent substation protects equipment running status apparatus for evaluating and maintenance decision method |
-
2021
- 2021-06-18 CN CN202110677498.5A patent/CN113341313B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6011480A (en) * | 1997-07-23 | 2000-01-04 | Schweitzer Engineering Laboratories, Inc. | Protection quality capability for protective relays used in an electric power system |
| JP2006197679A (en) * | 2005-01-12 | 2006-07-27 | Meidensha Corp | Digital ground fault current protection relay |
| CN101282037A (en) * | 2008-05-19 | 2008-10-08 | 天津大学 | Protection method for heterophase short-circuit of tractive power supply system |
| JP2013243827A (en) * | 2012-05-18 | 2013-12-05 | Toshiba Corp | Protective relay device and power supply circuit |
| CN103605787A (en) * | 2013-12-03 | 2014-02-26 | 国家电网公司 | Method and system for evaluating and analyzing relay protection |
| CN108732444A (en) * | 2018-05-29 | 2018-11-02 | 国网浙江省电力有限公司 | Intelligent substation protects equipment running status apparatus for evaluating and maintenance decision method |
Non-Patent Citations (1)
| Title |
|---|
| 电力系统继电保护的研究;王奎;《能源研究与管理》;20161231(01);第109-111页 * |
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