CN114720864B - Tripping and closing loop diagnosis method based on fault wave recording file - Google Patents
Tripping and closing loop diagnosis method based on fault wave recording file Download PDFInfo
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- CN114720864B CN114720864B CN202210290977.6A CN202210290977A CN114720864B CN 114720864 B CN114720864 B CN 114720864B CN 202210290977 A CN202210290977 A CN 202210290977A CN 114720864 B CN114720864 B CN 114720864B
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- 238000005070 sampling Methods 0.000 claims abstract description 63
- 238000011084 recovery Methods 0.000 claims abstract description 21
- 230000008034 disappearance Effects 0.000 claims abstract description 6
- 230000008033 biological extinction Effects 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 4
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
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Abstract
The invention discloses a fault wave recording file-based tripping and closing loop diagnosis method, which comprises the steps of acquiring a corresponding wave recording file according to the time calling of an MMS signal; extracting channel sampling data corresponding to a current channel, a protection tripping channel, a reclosing channel and a switch position channel, and extracting protection action time, switch opening time, current disappearance time, reclosing action time, switch closing time and current recovery time; calculating the switching-off time, the fault current vanishing time, the switching-on time and the current recovery time of the switch; and judging and obtaining an analysis and diagnosis result of the tripping and closing alarm. According to the invention, whether the circuit breaker breaks the circuit within the specified time can be known through analyzing the obtained key time data, so that whether the tripping and closing loop is normal or not is judged, and reasonable operation and maintenance overhauling comments are given.
Description
Technical Field
The invention relates to the technical field of intelligent substations, in particular to a tripping and closing loop diagnosis method based on a fault wave recording file.
Background
When the power grid has operation faults, the protection equipment sends out tripping and closing commands, and under normal conditions, the circuit breaker needs to trip or close the circuit breaker switch within a specified time, and the line current can become a no-current state to be close to a value of 0 or become a current state to generate a load value within the specified time. If the circuit breaker does not trip within a specified time due to equipment aging or other various reasons, the safety and stability of the operation of the power grid are negatively affected, and operation and maintenance personnel are required to be informed to carry out related maintenance work. The method is different from the mode that the tripping and closing action of the traditional transformer substation protection device outputs an electric signal, and the tripping and closing action of the protection device in the intelligent transformer substation outputs a GOOSE signal, so that an intermediate conversion link of an intelligent terminal is added in a tripping and closing loop from the protection device to a circuit breaker. The tripping and closing GOOSE signal is sent from the protection device, the signal is sent and received correctly in each step from the intelligent terminal to the circuit breaker, and the action time is required to be in the required range.
However, for the currently applied tripping and closing loop monitoring method, the relevant GOOSE and MMS signals in the tripping and closing process are monitored, whether the states of the signals of the tripping and closing process meet the requirements is judged by analyzing the states of the signals from the tripping and closing logic angle, whether the tripping and closing process meets the time requirements is not analyzed from the time angle, meanwhile, the time precision of the message data is low, and the message data is not enough to support the accurate analysis of whether the tripping and closing event meets the requirements from the time angle, so that the problems caused by equipment aging are not easy to perceive.
Disclosure of Invention
Based on the condition that the tripping and closing monitoring is in practical application, the invention provides a tripping and closing loop diagnosis method based on a fault wave recording file,
The above object of the present invention is achieved by the following technical means:
A fault recording file-based tripping and closing loop diagnosis method comprises the following steps:
Step 1, when the generation of a protection action MMS signal of a protection device is monitored, a corresponding wave recording file is acquired according to the time calling of the MMS signal;
step 2, analyzing the wave recording file obtained in the step 1, extracting channel sampling data corresponding to a current channel, a protection tripping channel, a reclosing channel and a switch position channel, wherein the switch position channel comprises a switch split position channel and a switch combined position channel,
Step 3, analyzing the channel sampling data in the step 2, and extracting a protection action time t1, a switch opening time t2, a current disappearance time t3, a reclosing action time t4, a switch closing time t5 and a current recovery time t6;
step 4, calculating a switch opening time T1, a fault current vanishing time T2, a switch closing time T3 and a current recovery time T4;
And 5, judging and obtaining an analysis and diagnosis result of the tripping and closing alarm through the switching-off time T1, the fault current vanishing time T2, the switching-on time T3 and the current recovery time T4.
In step 2 as described above,
The protection action time t1 is determined as the protection action time t1 by analyzing the protection tripping channel and traversing sampling data from the starting sampling point of the protection tripping channel, and finding out the time when the state of the first sampling point is changed from 0 to 1;
the switch opening time t2 is determined as the switch opening time t2 by analyzing a switch opening position channel and traversing sampling data from a sampling point corresponding to the protection action time t1 to the back, and finding out the time when the state of the first sampling point is changed from 0 to 1;
The current vanishing time t3 is obtained by analyzing a current channel, and traversing from a sampling point corresponding to the switch opening time t2 to the back to calculate an effective value val1 of a cycle of each sampling point and an effective value val2 of a cycle of the previous cycle, wherein if val1< = 0.01In and val2> = 0.01In, in is a secondary rated value of the current channel, the time corresponding to the sampling point is the current vanishing time t3;
The reclosing action time t4 is determined as the reclosing action time t4 by analyzing a reclosing channel and traversing sampling data from a sampling point corresponding to the switch opening time t2 to the back, and finding out the time when the state of the first sampling point is changed from 0 to 1;
The switching-on time t5 is determined as the switching-on time t5 by analyzing a switching-on position channel, traversing sampling data from a sampling point corresponding to the reclosing action time t4 to the back, and finding out the time when the state of the first sampling point is changed from 0 to 1;
The current recovery time t6 is obtained by analyzing a current channel, traversing from a sampling point where a switch closing time t5 is located to the back, calculating an effective value val3 of a cycle of each sampling point and an effective value val4 of a cycle of the previous cycle, and if val3> =0.01 In, val4< = 0.01In, in is a secondary rated value of the current channel, then the time corresponding to the sampling point is t6.
In step 4 as described above,
The switch opening time T1=t2-T1;
fault current extinction time t2=t3-T2;
switch closing time t3=t5-T4;
Current recovery time t4=t6-T5.
In the above-mentioned step 4, for the case of the three-phase operation or the two-phase operation, t1 takes the earliest protection operation time in each phase of the protection trip channel, t2 takes the latest switch opening time in each phase of the switch opening position channel, t3 takes the latest current disappearance time in each phase of the current channel, t5 takes the latest switch closing time in each phase of the switch closing position channel, and t6 takes the latest current restoration time in each phase of the current channel.
In step 5 as described above,
The analysis and diagnosis result criteria of the tripping and closing alarm are as follows:
if T1<20ms and T2<20ms and T3<20ms and T4<20ms, judging that the analysis diagnosis result is normal;
if T1> =20 ms or T2> =20 ms or T3> =20 ms or T4> =20 ms, and at the same time t1+t2<40ms and t3+t4<40ms, determining that the analysis diagnosis result is abnormal and needs to be focused;
if t1+t2> =40 ms or t3+t4> =40 ms, the analysis and diagnosis result is determined to be seriously needed to be overhauled.
Compared with the prior art, the invention has the following beneficial effects:
According to the invention, by combining fault wave recording file data generated by tripping and closing, the switching value channel and analog value channel data in the fault wave recording file data are analyzed, and key time data for tripping and closing time analysis are extracted from the fault wave recording file data, wherein the key time data comprise: the time information is shown in fig. 1 on a time axis, and the protection action time T1, the switch opening time T2, the current disappearance time T3, the reclosing action time T4, the switch closing time T5, the current recovery time T6, the switch opening time T1, the fault current disappearance time T2, the switch closing time T3 and the current recovery time T4 are shown in the time axis. The key time data obtained through analysis can be used for knowing whether the circuit breaker breaks the circuit within a specified time, so that whether the tripping and closing loop is normal or not is judged, and reasonable operation and maintenance overhauling comments are given.
Drawings
Fig. 1 shows a time-axis sequence of a protection operation time T1, a switch-off time T2, a current extinction time T3, a reclosing operation time T4, a switch-on time T5, a current recovery time T6, a switch-off time T1, a fault current extinction time T2, a switch-on time T3, and a current recovery time T4.
Detailed Description
The present invention will be further described in detail below in conjunction with the following examples, for the purpose of facilitating understanding and practicing the present invention by those of ordinary skill in the art, it being understood that the examples described herein are for the purpose of illustration and explanation only and are not intended to limit the invention.
A fault recording file-based tripping and closing loop diagnosis method comprises the following steps:
Firstly, monitoring a protection action MMS signal of the protection device, and when the generation of the MMS signal of the protection action of the protection device is monitored, calling and acquiring a wave recording file corresponding to the current action of the protection device according to time information of the MMS signal.
And secondly, analyzing the wave recording file obtained in the first step, and extracting channel sampling data. The method comprises the steps of selecting four channels of a current channel, a protection tripping channel, a reclosing channel and a switch position channel from a wave recording file generated by the action of a protection device, and extracting channel sampling data for subsequent analysis, wherein the switch position channel comprises a switch position dividing channel and a switch position combining channel.
And thirdly, analyzing the channel sampling data in the second step, and extracting key moment point information t 1-t 6 in the channel sampling data.
The protection action time t1 is determined as the protection action time t1 by analyzing the protection tripping channel and traversing sampling data from the starting sampling point of the protection tripping channel, and finding out the time when the state of the first sampling point is changed from 0 to 1;
the switch opening time t2 is determined as the switch opening time t2 by analyzing a switch opening position channel and traversing sampling data from a sampling point corresponding to the protection action time t1 to the back, and finding out the time when the state of the first sampling point is changed from 0 to 1;
The current vanishing time t3 is obtained by analyzing a current channel, and traversing from a sampling point corresponding to the switch opening time t2 to the back to calculate an effective value val1 of a cycle of each sampling point and an effective value val2 of a cycle of the previous cycle, wherein if val1< = 0.01In and val2> = 0.01In, in is a secondary rated value of the current channel, the time corresponding to the sampling point is the current vanishing time t3;
The reclosing action time t4 is determined as the reclosing action time t4 by analyzing a reclosing channel and traversing sampling data from a sampling point corresponding to the switch opening time t2 to the back, and finding out the time when the state of the first sampling point is changed from 0 to 1;
The switching-on time t5 is determined as the switching-on time t5 by analyzing a switching-on position channel, traversing sampling data from a sampling point corresponding to the reclosing action time t4 to the back, and finding out the time when the state of the first sampling point is changed from 0 to 1;
The current recovery time t6 is obtained by analyzing a current channel, traversing from a sampling point where a switch closing time t5 is located to the back, calculating an effective value val3 of a cycle of each sampling point and an effective value val4 of a cycle of the previous cycle, and if val3> =0.01 In, val4< = 0.01In, in is a secondary rated value of the current channel, then the time corresponding to the sampling point is t6.
And fourthly, analyzing the information of the time points T1 to T6 in the third step, and calculating and acquiring the tripping and closing alarm analysis key time index data T1 to T4. The calculation formulas of T1 to T4 are as follows:
The switch opening time T1=t2-T1;
fault current extinction time t2=t3-T2;
switch closing time t3=t5-T4;
Current recovery time t4=t6-T5;
For the case of three-phase action or two-phase action, each corresponding channel has a protection action time t1, a switch opening time t2, a current vanishing time t3, a switch closing time t5 and a current recovery time t6,
In step 4, t1 takes the earliest protection action time in each of the same protection tripping channels, t2 takes the latest switch opening time in each of the same switch dividing position channels, t3 takes the latest current vanishing time in each of the same current channels, t5 takes the latest switch closing time in each of the same switch closing position channels, and t6 takes the latest current recovery time in each of the same current channels.
And fifthly, analyzing the time index data T1-T4 obtained in the fourth step and judging by combining with a threshold value to obtain an analysis diagnosis result of the tripping and closing alarm. The analysis and diagnosis result criteria of the tripping and closing alarm are as follows:
if T1<20ms and T2<20ms and T3<20ms and T4<20ms, judging that the analysis diagnosis result is normal;
if T1> =20 ms or T2> =20 ms or T3> =20 ms or T4> =20 ms, and at the same time t1+t2<40ms and t3+t4<40ms, determining that the analysis diagnosis result is abnormal and needs to be focused;
if t1+t2> =40 ms or t3+t4> =40 ms, the analysis and diagnosis result is determined to be seriously needed to be overhauled.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (4)
1. The fault wave recording file-based tripping and closing loop diagnosis method is characterized by comprising the following steps of:
Step 1, when the generation of a protection action MMS signal of a protection device is monitored, a corresponding wave recording file is acquired according to the time calling of the MMS signal;
step 2, analyzing the wave recording file obtained in the step 1, extracting channel sampling data corresponding to a current channel, a protection tripping channel, a reclosing channel and a switch position channel, wherein the switch position channel comprises a switch split position channel and a switch combined position channel,
Step 3, analyzing the channel sampling data in the step 2, and extracting a protection action time t1, a switch opening time t2, a current disappearance time t3, a reclosing action time t4, a switch closing time t5 and a current recovery time t6;
Step 4, calculating a switch opening time T1, a fault current vanishing time T2, a switch closing time T3 and a current recovery time T4;
Step 5, judging and obtaining the analysis and diagnosis result of the tripping and closing alarm through the switching off time T1, the fault current vanishing time T2, the switching on time T3 and the current recovery time T4,
In the step 2 described above, the step of,
The protection action time t1 is determined as the protection action time t1 by analyzing the protection tripping channel and traversing sampling data from the starting sampling point of the protection tripping channel, and finding out the time when the state of the first sampling point is changed from 0 to 1;
the switch opening time t2 is determined as the switch opening time t2 by analyzing a switch opening position channel and traversing sampling data from a sampling point corresponding to the protection action time t1 to the back, and finding out the time when the state of the first sampling point is changed from 0 to 1;
The current vanishing time t3 is obtained by analyzing a current channel, and traversing from a sampling point corresponding to the switch opening time t2 to the back to calculate an effective value val1 of a cycle of each sampling point and an effective value val2 of a cycle of the previous cycle, wherein if val1< = 0.01In and val2> = 0.01In, in is a secondary rated value of the current channel, the time corresponding to the sampling point is the current vanishing time t3;
The reclosing action time t4 is determined as the reclosing action time t4 by analyzing a reclosing channel and traversing sampling data from a sampling point corresponding to the switch opening time t2 to the back, and finding out the time when the state of the first sampling point is changed from 0 to 1;
The switching-on time t5 is determined as the switching-on time t5 by analyzing a switching-on position channel, traversing sampling data from a sampling point corresponding to the reclosing action time t4 to the back, and finding out the time when the state of the first sampling point is changed from 0 to 1;
The current recovery time t6 is obtained by analyzing a current channel, traversing from a sampling point where a switch closing time t5 is located to the back, calculating an effective value val3 of a cycle of each sampling point and an effective value val4 of a cycle of the previous cycle, and if val3> =0.01 In, val4< = 0.01In, in is a secondary rated value of the current channel, then the time corresponding to the sampling point is t6.
2. The fault log file-based tripping and closing circuit diagnosis method according to claim 1, wherein in the step 4,
The switch opening time T1=t2-T1;
Fault current extinction time t2=t3-T2;
Switch closing time t3=t5-T4;
Current recovery time t4=t6-T5.
3. The fault log file-based tripping and closing loop diagnosis method according to claim 2, wherein in the step 4, for the case of three-phase operation or two-phase operation, t1 takes the earliest protection operation time in each of the protection trip channels, t2 takes the latest switching off time in each of the switch split position channels, t3 takes the latest current vanishing time in each of the current channels, t5 takes the latest switching on time in each of the switch split position channels, and t6 takes the latest current recovery time in each of the current channels.
4. The fault log file-based tripping and closing circuit diagnosis method according to claim 2, wherein in the step 5,
The analysis and diagnosis result criteria of the tripping and closing alarm are as follows:
If T1 < 20ms and T2 < 20ms and T3 < 20ms and T4 < 20ms, judging that the analysis diagnosis result is normal;
If T1 > =20 ms or T2 > =20 ms or T3 > =20 ms or T4 > =20 ms, and at the same time t1+t2 < 40ms and t3+t4 < 40ms, determining that the analysis diagnosis result is abnormal and needs to be focused;
if t1+t2 > =40 ms or t3+t4 > =40 ms, the analysis and diagnosis result is determined to be seriously needed to be overhauled.
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| CN110261768A (en) * | 2019-07-19 | 2019-09-20 | 长沙理工大学 | Electrical power distribution automatization system primary cut-out state monitoring method |
| CN113466584A (en) * | 2021-06-22 | 2021-10-01 | 国网安徽省电力有限公司检修分公司 | Fault diagnosis positioning method for monitoring tripping and closing |
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| CN102611086B (en) * | 2012-03-27 | 2015-01-07 | 许继电气股份有限公司 | Centralized protection system and method for region distribution network |
| RU2502167C1 (en) * | 2012-06-05 | 2013-12-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Орловский государственный аграрный университет" (ФГБОУ ВПО ОрелГАУ) | Control method of switching-off, automatic repeated switching-on and failure of switching-off of main switch of line at transition of two-phase short circuit to three-phase one |
| JP6719335B2 (en) * | 2016-08-26 | 2020-07-08 | 株式会社日立製作所 | Switch operating characteristic monitoring device, switch including the same, and switch operating characteristic monitoring method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110261768A (en) * | 2019-07-19 | 2019-09-20 | 长沙理工大学 | Electrical power distribution automatization system primary cut-out state monitoring method |
| CN113466584A (en) * | 2021-06-22 | 2021-10-01 | 国网安徽省电力有限公司检修分公司 | Fault diagnosis positioning method for monitoring tripping and closing |
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