CN114447873A - Breaker action evaluation method and system based on substation automation information - Google Patents
Breaker action evaluation method and system based on substation automation information Download PDFInfo
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Abstract
A breaker action evaluation method and system based on substation automation information are disclosed, the method comprises the following steps: step 1, encoding basic information of all substations, and establishing a substation basic information database; step 2, establishing a rule database comprising protection devices, breaker action rules and breaker state rules; step 3, when an accident trip occurs, reading basic information of the transformer substation from a transformer substation basic information database, establishing a communication interface with intelligent electronic equipment in the transformer substation, and extracting automatic information acquired by the intelligent electronic equipment; and 4, evaluating the action of the circuit breaker by using the automatic information extracted in the step 3, and generating a circuit breaker action evaluation report with a set format. The invention provides a method for establishing a basic database, which is a method for evaluating the state of a breaker after action based on an artificial intelligence method and forms an individualized evaluation report.
Description
Technical Field
The invention belongs to the technical field of intelligent electronic equipment of transformer substations, and particularly relates to a breaker action evaluation method and system based on transformer substation automation information.
Background
When the high-voltage circuit breaker is tripped by accident, a power transformation operation attendant needs to check and monitor Intelligent Electronic Devices (IEDs) such as a background, relay protection and fault recording and the like and to perform on-site inspection to confirm the working state of the circuit breaker, and reports the working state to all levels of dispatching within 15-20 minutes, so that a dispatching department serving as a power grid command center can know the on-site situation at the first time and comprehensively command the safe and stable operation of a large power grid.
However, with the advance of unattended and unattended substations, one 500kV substation occupies nearly one hundred acres and is only provided with two operators, the number of operators on duty at the station is very short, and the following problems occur when an accident trip occurs: (1) traditional intelligent electronic equipment works independently, information cannot be interacted, data are not communicated, and the information needs to be acquired respectively. In addition, due to the fact that installation positions are scattered, physical strength of workers is greatly consumed, and the workers are prone to mistakenly enter other equipment intervals to cause failure in information acquisition;
(2) the traditional intelligent electronic equipment acquires information and has side points, if a relay protection device focuses on the situation of protection action, a circuit breaker online monitoring device focuses on the state of a circuit breaker, and a transformer substation integrated automation system focuses on the situations of field tide distribution, switch deflection and accident abnormity. Therefore, when the accident trip occurs, the situation of information redundancy can occur, the required key information needs to be manually screened and selected, the interference information is more, and the reporting efficiency is low;
(3) the circuit breaker is used as a key device for breaking a large current, and if the device state is not good, explosion danger is easy to occur. At present, the breaker online monitoring IED can collect and analyze various breaker data and give out the evaluation of whether the breaker is defective, but does not comprehensively evaluate various indexes and give out the conclusion of whether an operator on duty can go to the site to check. When the accident trips, due to the exigency of the situation, the person on duty still needs to take the explosion risk of the electrical equipment to go to the site for checking, and the danger coefficient is high.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a breaker action evaluation method and system based on substation automation information, which are realized based on an artificial intelligence method, have a substation basic information importing function, can also read remote signaling and remote measuring information, protection device information, fault recording information and online monitoring device information of a field breaker in real time, can evaluate the state of the breaker after action by integrating the information, and finally output a personalized breaker action evaluation report according to a selected item.
The invention adopts the following technical scheme. A breaker action evaluation method based on substation automation information is characterized by comprising the following steps:
step 1, encoding basic information of all substations, and establishing a substation basic information database;
step 2, establishing a rule database comprising protection devices, breaker action rules and breaker state rules;
step 3, when an accident trip occurs, reading basic information of the transformer substation from a transformer substation basic information database, establishing a communication interface with intelligent electronic equipment in the transformer substation, and extracting automatic information acquired by the intelligent electronic equipment;
and 4, evaluating the action of the circuit breaker by using the automatic information extracted in the step 3, and generating a circuit breaker action evaluation report with a set format.
Preferably, the basic information of the substation in step 1 includes: area number, city number, substation number, breaker number, rheology ratio and device type.
Preferably, in step 1, the basic information of the substation is encoded in such a way that a region number, a city number, a substation number, a breaker number, a rheological ratio and a device type are represented by numbers, and the basic information of each substation is encoded into a unique string of numbers.
Preferably, in step 2, the protection device and the breaker action rule include:
when a line fails, the main protection of the line should act, and the backup protection should act when the delay reaches;
if the line fails and meets the reclosing condition, the reclosing should act;
the circuit is recovered to be normal after reclosing due to transient faults of the circuit, and the circuit is accelerated after reclosing due to permanent faults of the circuit;
if the breaker is required to jump and jump, the breaker acts correctly; if the breaker is not tripped, the breaker refuses to operate; the circuit breaker is not required to jump and jump, and the circuit breaker is in misoperation;
if the protection is actuated, the correct action is protected; if the protection is in response to the action and not in action, the protection is refused to be operated; and protecting against malfunction if the protection is not to be actuated.
Preferably, the breaker state rule in step 2 includes:
the circuit breaker has slow score and is not recommended to go to the site;
the circuit breaker is slowly closed and is not recommended to go to the site;
the circuit breaker is pressed frequently, and the user does not advise to go to the site;
the remaining action times of the circuit breaker are 1, and the circuit breaker is not recommended to go to the site;
when the arc duration of the circuit breaker is overtime, the circuit breaker is not recommended to go to the site;
the abrasion of the main contact of the circuit breaker exceeds a critical value, and the circuit breaker is not recommended to go to the site.
Preferably, the automation information in step 3 includes: remote signaling and remote measuring information, protection device information, fault recording information and online monitoring device information.
Preferably, step 4 comprises:
step 4.1, automatic information data screening is carried out, and data used for circuit breaker action evaluation are selected;
step 4.2, extracting the action behaviors of the circuit breaker and the equipment states of the circuit breaker from a rule database by using the data generated in the step 3.1;
and 4.3, selecting all or part of the items from all the items, and generating a breaker operation evaluation report with a set format.
Preferably, step 4.1 comprises:
if only one path of signal exists, directly adopting the data of the signal;
if only two paths of similar signals exist, the relative error of the two paths of similar signals is considered to be correct when the relative error is within a threshold value, the automatic information of the first set of protection device is adopted by default, and when the relative error is greater than the threshold value, the automatic information with high historical accuracy is taken as the standard, and an alarm prompt with overlarge error is given;
if three or more similar signals exist, the relative error between every two signals is considered to be correct when the relative error is within a threshold value, and the automatic information of the first set of protection device is adopted by default; when data with relative error larger than threshold exists, the data is archived and alarmed so as to eliminate defects in time, and an information selection link is not entered any more, so that the relative error of each path of residual information is ensured to be within the threshold; and if the relative errors between every two adjacent sensors are larger than the threshold value, giving an alarm prompt with overlarge errors based on the automatic information with high historical accuracy.
Preferably, all items described in step 4.3 include: the method comprises the following steps of basic information of the transformer substation, weather, time, trip circuits and phases, protection actions, fault distance measurement results, fault current values, reclosing states and operators on duty.
The invention also provides a circuit breaker action evaluation system based on the substation automation information, which uses the circuit breaker action evaluation method based on the substation automation information, and is characterized by comprising the following steps:
the transformer substation basic information database comprises basic information of all transformer substations in a digital form;
the rule database comprises a protection device, a breaker action rule and a breaker state rule;
the data extraction module is used for reading the basic information of the transformer substation from a transformer substation basic information database when the accident tripping occurs, establishing a communication interface with intelligent electronic equipment in the transformer substation and extracting the automatic information acquired by the intelligent electronic equipment;
the evaluation report generation module is used for evaluating the action of the circuit breaker by using the automatic information extracted by the data extraction module and generating a circuit breaker action evaluation report with a set format;
and the data output module is used for outputting the breaker action evaluation report generated by the evaluation report generation module.
Compared with the prior art, the invention has the beneficial effects that:
(1) a method of base database building is provided. The information of any transformer substation can be replaced by a string of numbers according to actual configuration, and the method and the system designed by the invention can be perfectly applied to action evaluation of the breaker of the transformer substation after being input as basic information.
(2) The method can read substation automation information such as remote signaling and remote measuring information, protection device information, fault recording information and on-line monitoring device information of the on-site circuit breaker, and complete state evaluation of the circuit breaker after action based on an artificial intelligence method.
(3) And a personalized evaluation report can be formed, and the method for rapidly reporting essential point information can be completed according to the requirements of a scheduling department.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
Detailed Description
The present application is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present application is not limited thereby.
Example 1:
as shown in fig. 1, the present invention provides a method for evaluating a circuit breaker operation based on substation automation information, comprising the following steps:
step 1, encoding the basic information of all substations and establishing a substation basic information database. At present, different devices in a substation are distinguished by a power system through double names (name + number), but the types and numbers of the devices of the substations are greatly different due to different wiring modes. Therefore, basic information of each station is established firstly, so that related equipment and devices can be accurately positioned when the information is collected. The basic data involved in line protection are as follows:
TABLE 1 breaker-Intelligent electronic device Association table
Based on the method for establishing the database, any transformer substation can compile a string of different numbers according to actual conditions, and the complete and detailed transformer substation basic information can be obtained by inputting the string of different numbers into the system provided by the invention and can be applied to the next action evaluation of the circuit breaker.
It is to be understood that table 1 is only an exemplary breaker-intelligent electronic device association table, wherein the data attributes may be those categories given in the table or those categories not given in the table; the number of categories may be more or less; the digital programming mode can be a more digit number or a less digit number according to the field reality; the numbers used can be 10-system numbers or other system numbers, and the embodiments fall into the scope covered by the invention.
And 2, establishing a rule database comprising action rules of the protection device and the circuit breaker and state rules of the circuit breaker, and judging action behaviors and equipment states by an artificial intelligence method in subsequent steps.
A rule database (hereinafter referred to as a rule database) may be established, for example, typical protection device and circuit breaker action rules are as follows:
line faults, namely, the main protection of the line is required to act under the general conditions except the conditions of high-resistance grounding and the like, and the backup protection is required to act when the time delay arrives;
if the line fails and meets the reclosing condition, the reclosing should act;
the circuit is recovered to be normal after reclosing due to transient faults of the circuit, and the circuit is accelerated after reclosing due to permanent faults of the circuit;
the circuit breaker is required to jump and jump, and then the circuit breaker acts correctly; if the breaker is not tripped, the breaker refuses to operate; the circuit breaker is not required to jump and jump, and the circuit breaker is in misoperation;
if the protection is actuated, the correct action is protected; if the protection is in response to the action and not in action, the protection is refused to be operated; protecting against malfunction and action, and protecting against malfunction;
···
a typical breaker state rule is as follows:
the circuit breaker has slow score and is not recommended to go to the site;
the circuit breaker is slowly closed and is not recommended to go to the site;
the circuit breaker is pressed frequently, and the user does not advise to go to the site;
the remaining action times of the circuit breaker are 1, and the circuit breaker is not recommended to go to the site;
when the arc duration of the circuit breaker is overtime, the circuit breaker is not recommended to go to the site;
the abrasion of the main contact of the circuit breaker exceeds a critical value, and the circuit breaker is not recommended to go to the site;
···
based on the rule base, the critical information such as whether the protection action behavior and the breaker action behavior are correct, whether the breaker has slow-breaking slow-closing and explosion risks, whether the contact and insulation of the breaker are good and the like can be judged by a typical artificial intelligence method, and the state evaluation after the breaker acts is given by integrating the conditions.
It should be noted that the rule base is only a preferred but non-limiting embodiment described for clearly describing the technical solution of the present invention, and those skilled in the art can configure the breaker action rule database and the breaker state rule database according to the actual field, for example, more or less rules are used, and the rules included in the above embodiment or the rules not included in the above embodiment are all covered in the technical solution of the present invention.
And 3, when the accident tripping occurs, reading the basic information of the transformer substation from the transformer substation basic information database, establishing a communication interface with intelligent electronic equipment in the transformer substation, and extracting the automatic information acquired by the intelligent electronic equipment. It can be understood that the substation basic information base can be positioned to specific equipment at a specific place, and once the breaker acts, the action equipment information read from the substation basic information is immediately positioned accurately. A particular station is intended to distinguish substations throughout the country or even nationwide. The number of the transformer substations is the largest, and a plurality of transformer substation circuit breakers can act at the same time, so that a specific transformer substation needs to be accurately positioned when the circuit breakers act, and all basic information of the transformer substation is read.
The step 3 specifically comprises the following steps:
after the basic information of the transformer substation is read, the system immediately identifies the intelligent electronic equipment configured in the substation through an algorithm. Intelligent electronic devices include, but are not limited to: the system comprises a relay protection device, a fault recording device, a transformer substation integrated automation system, a circuit breaker mechanical characteristic online monitoring system and the like.
Wherein, the relay protection device takes PSL-603U series line protection as an example, and the data acquisition function comprises: recordable analog quantity is Ia,Ib,Ic,3I0,Ua,Ub,Uc,3U0,UxThe specific recorded analog quantity depends on the analog quantity actually accessed by the device. The recordable state quantities are circuit breaker positions, protection tripping and closing commands, other protection actions, remote opening and closing and the like. Besides recording system disturbance data, a state input quantity displacement event, a device alarm event and the like can also be recorded. When the device is tripped, the fault type and the ranging result can be given.
The fault recorder takes a YS-88A type fault recorder as an example, and the data acquisition function comprises the following functions: the working state, current and voltage waveform of each front-end processor and the related quantity of P, Q, I, U, F and the like are monitored in real time, and the latest 14 recording files are displayed. The high-frequency quantity can be recorded, the signal quantity of a switch and the like can be recorded, wherein the high-frequency quantity can be sampled at a high speed of 10000 points per second, and the phase difference signal of a high-frequency channel can be accurately reflected. Long-term oscillations and long-term voltage, current and frequency violations may be recorded. Temperature off-limit starting and real-time temperature monitoring can be set.
The comprehensive automation system of the transformer substation takes the CSC-2000 as an example, and the data acquisition function comprises the following functions: the analog quantity which can be recorded is voltage, current and derives active power, reactive power, power factor and frequency, and other direct current input of the thermometer can be measured. The recordable digital quantity includes position signals of circuit breaker, isolating switch and earthing knife-switch, protection action signal, operation monitoring signal and on-load tap-changing transformer tap position signal. The recordable pulse amounts include active and reactive power.
Circuit breaker mechanical properties on-line monitoring system to iBMS2020 for example, the data acquisition function includes: electrical life diagnosis, mechanical system diagnosis, control loop state monitoring, energy storage mechanism state monitoring and the like.
Wherein, the electric life diagnosis: the monitoring parameters comprise current waveform of the opening/closing process, current amplitude of the normal working and opening/closing process, arc duration, opening/closing action times, time and date, arc reignition and accumulated electrical wear of the main contact.
And (3) mechanical system diagnosis: the monitoring parameters comprise coil opening/closing time, opening/closing coil current waveform, breaker moving contact stroke and overtravel, breaker moving contact speed (including rigid opening speed, rigid closing speed, moving contact average speed and maximum speed), and breaker opening/closing state.
Monitoring the state of a control loop: the monitoring parameter includes an auxiliary contact actuation time.
Monitoring the state of the energy storage mechanism: the monitoring parameters comprise the working current waveform of the energy storage motor and the starting times of the energy storage motor.
Taking a typical IED configuration scheme in a certain 500kV transformer substation in Nanjing as an example, the method for extracting the automation information and the requirements are described as follows:
as for the relay protection device, 5011 breaker related protection is taken as an example.
The first set of line protection: PCS-931GMM establishes a communication interface with the protection, and accesses protection action information, protection action time, switch displacement condition, recording waveform and fault current magnitude (secondary value).
The second set of line protection: and the CSC-103A establishes a communication interface with the protection and accesses protection action information, protection action time, switch displacement condition, recording waveform and fault current magnitude (secondary value).
First set of busbar differential protection of I mother of 500 kV: PCS-915M accesses protection action information, protection action time, switch deflection condition, recording waveform and fault current magnitude (secondary value).
The second set of bus differential protection of the 500kV I bus: the NSR-371C receives protection operation information, protection operation time, switch displacement, recording waveform, and fault current magnitude (secondary value).
The first set of circuit breaker protection: and the PRS-721A-G establishes a communication interface with the protection, and accesses the failure action information, the failure action time, the reclosing action information, the reclosing action time and the switch deflection condition.
And the second set of circuit breaker protection: and the RCS921A establishes a communication interface with the protection, and accesses failure action information, failure action time, reclosing action information, reclosing action time and switch displacement conditions.
For a related line fault recording device, taking YS-88A as an example, a communication interface with the device is established, the displacement condition of a switch is read, a recording waveform is read, and the magnitude (secondary value) of fault current is read.
For a comprehensive automation system of a transformer substation, taking CSC-2000 as an example, a communication interface with the device is established, main wiring information is read, the displacement condition of a switch is read, and position information of an isolating switch and a grounding knife switch is read.
For the on-line monitoring system of the mechanical characteristics of the circuit breaker, for example, the isbs 2020 is taken as an example, a communication interface with the device is established, and the opening/closing state, the opening/closing time, the opening/closing action times, the starting times of the energy storage motor, the arc duration, the accumulated electrical wear condition of the main contact, the stroke and the overtravel of the moving contact of the circuit breaker, and the speed of the moving contact of the circuit breaker (including the rigid opening speed, the rigid closing speed, the average speed and the maximum speed of the moving contact) are read.
It is understood that the method and requirements for extracting automation information are only illustrated by a typical IED configuration scheme in a 500kV substation in the Nanjing area for a clear description of a preferred but non-limiting embodiment of the technical solution of the present invention, and do not mean that the present invention must obtain the collected data in such a way. In engineering application, the technical scheme disclosed by the invention can also be used for extracting automation information for any other kinds of IEDs in any other regions and substations of any levels. The model of the device, the type of the collected data, and the like given in the present embodiment are only an exemplary illustration, and do not limit the present invention.
And 4, evaluating the action of the circuit breaker by using the automatic information extracted in the step 3, and generating a circuit breaker action evaluation report with a set format. Namely, based on the basic information of the transformer substation and the accessed intelligent electronic equipment information, the evaluation and analysis of the breaker action are carried out according to the following steps:
and 4.1, automatically screening information data, and selecting data used for evaluating the action of the circuit breaker.
In view of the difference in device performance, even if the monitoring records for the same parameter are different, the following processing is performed for multiple similar traffic signals:
if only two paths of similar signals exist, the relative error of the two paths of similar signals is considered to be correct when the relative error is within a threshold value, the automatic information of the first set of protection device is adopted by default, and when the relative error is greater than the threshold value, the automatic information with high historical accuracy is taken as the standard, and an alarm prompt with overlarge error is given;
if three or more similar signals exist, the relative error between every two signals is considered to be correct when the relative error is within a threshold value, and the automatic information of the first set of protection device is adopted by default; when data with relative error larger than threshold exists, the data is archived and alarmed so as to eliminate defects in time, and an information selection link is not entered any more, so that the relative error of each path of residual information is ensured to be within the threshold; if the relative errors between every two are larger than the threshold value, giving an alarm prompt with overlarge error based on the automatic information with high historical accuracy;
it will be appreciated that the value of the threshold can be set arbitrarily by a person skilled in the art depending on the actual field, and a preferred but non-limiting embodiment is to set the threshold to 10%.
And 4.2, extracting the action behaviors of the circuit breaker and the equipment state of the circuit breaker from the rule database by using the data generated in the step 4.1.
And 4.3, selecting all or part of the items from all the items, and generating a breaker action evaluation report with a set format, namely forming an individualized state evaluation report and finishing the quick reporting of information required by scheduling.
A typical circuit breaker trip incident report format is as follows:
i, XXX change, XX weather, X minutes and X seconds at X day, and X phase trip of XXX line;
ii, XXX protection action, fault location XXKM, fault current XXA (primary value XXXA);
iii, XXX protection action, fault distance measurement XXKM, fault current XXA (primary value XXA);
iv, successful/unsuccessful/non-action of reclosing (reclosing state: single phase/deactivation);
v, attendant (sign).
The information can be directly filled or calculated after the correct data is read, and the method is efficient and high in accuracy. In addition, according to the state evaluation conclusion after the circuit breaker acts, whether the report is output and printed in the circuit breaker action evaluation report is selected as a check item, report information is customized in a personalized mode, report requirements of scheduling in different regions are met, meanwhile, whether a watchman is suitable for going to a field for inspection is informed, and personal safety is further guaranteed.
Compared with the prior art, the invention has the beneficial effects that:
(1) a method of base database building is provided. The information of any transformer substation can be replaced by a string of numbers according to actual configuration, and the method and the system designed by the invention can be perfectly applied to action evaluation of the breaker of the transformer substation after being input as basic information.
(2) The method can read substation automation information such as remote signaling and remote measuring information, protection device information, fault recording information and on-line monitoring device information of the on-site circuit breaker, and complete state evaluation of the circuit breaker after action based on an artificial intelligence method.
(3) And a personalized evaluation report can be formed, and the method for rapidly reporting essential point information can be completed according to the requirements of a scheduling department.
The present applicant has described and illustrated embodiments of the present invention in detail with reference to the accompanying drawings, but it should be understood by those skilled in the art that the above embodiments are merely preferred embodiments of the present invention, and the detailed description is only for the purpose of helping the reader to better understand the spirit of the present invention, and not for limiting the scope of the present invention, and on the contrary, any improvement or modification made based on the spirit of the present invention should fall within the scope of the present invention.
Claims (10)
1. A breaker action evaluation method based on substation automation information is characterized by comprising the following steps:
step 1, encoding basic information of all substations, and establishing a substation basic information database;
step 2, establishing a rule database comprising protection devices, breaker action rules and breaker state rules;
step 3, when an accident trip occurs, reading basic information of the transformer substation from a transformer substation basic information database, establishing a communication interface with intelligent electronic equipment in the transformer substation, and extracting automatic information acquired by the intelligent electronic equipment;
and 4, evaluating the action of the circuit breaker by using the automatic information extracted in the step 3, and generating a circuit breaker action evaluation report with a set format.
2. The substation automation information-based circuit breaker operation evaluation method according to claim 1, characterized in that:
the basic information of the transformer substation in the step 1 comprises the following steps: area number, city number, substation number, breaker number, rheology transformation ratio and device type.
3. The substation automation information-based circuit breaker operation evaluation method according to claim 2, characterized in that:
in the step 1, the basic information of the transformer substation is coded in a mode that the area number, the city number, the transformer substation number, the breaker number, the rheological ratio and the device type are represented by numbers, and the basic information of each transformer substation is coded into a unique string of numbers.
4. The substation automation information-based circuit breaker operation evaluation method according to any one of claims 1 to 3, characterized in that:
in step 2, the protection device and the breaker action rule comprise:
when a line fails, the main protection of the line should act, and the backup protection should act when the delay reaches;
if the line fails and meets the reclosing condition, the reclosing should act;
the circuit is recovered to be normal after reclosing due to transient faults of the circuit, and the circuit is accelerated after reclosing due to permanent faults of the circuit;
the circuit breaker is required to jump and jump, and then the circuit breaker acts correctly; if the breaker is not tripped, the breaker refuses to operate; the circuit breaker is not required to jump and jump, and the circuit breaker is in misoperation;
if the protection is in response and active, the protection is in correct action; if the protection is in response to the action and not in action, the protection is refused to be operated; and protecting against malfunction if the protection is not to be actuated.
5. The substation automation information-based circuit breaker operation evaluation method according to any one of claims 1 to 4, wherein:
the breaker state rule in step 2 comprises:
the circuit breaker has slow score and is not recommended to go to the site;
the circuit breaker is slowly closed and is not recommended to go to the site;
the circuit breaker is frequently pressed, and the circuit breaker is not recommended to go to the site;
the remaining action times of the circuit breaker are 1, and the circuit breaker is not recommended to go to the site;
when the arc duration of the circuit breaker is overtime, the circuit breaker is not recommended to go to the site;
the abrasion of the main contact of the circuit breaker exceeds a critical value, and the circuit breaker is not recommended to go to the site.
6. The substation automation information-based circuit breaker operation evaluation method according to any one of claims 1 to 5, wherein:
the automation information in step 3 includes: remote signaling and remote measuring information, protection device information, fault recording information and online monitoring device information.
7. The substation automation information-based circuit breaker operation evaluation method according to any one of claims 1 to 6, wherein:
the step 4 comprises the following steps:
step 4.1, automatic information data screening is carried out, and data used for circuit breaker action evaluation are selected;
step 4.2, extracting the action behaviors of the circuit breaker and the equipment states of the circuit breaker from a rule database by using the data generated in the step 3.1;
and 4.3, selecting all or part of the items from all the items, and generating a breaker operation evaluation report with a set format.
8. The substation automation information-based circuit breaker operation evaluation method according to any one of claims 1 to 7, wherein:
step 4.1 comprises:
if only one path of signal exists, directly adopting the data of the signal;
if only two paths of similar signals exist, the relative error of the two paths of similar signals is considered to be correct when the relative error is within a threshold value, the automatic information of the first set of protection device is adopted by default, and when the relative error is greater than the threshold value, the automatic information with high historical accuracy is taken as the standard, and an alarm prompt with overlarge error is given;
if three or more similar signals exist, the relative error between every two signals is considered to be correct when the relative error is within a threshold value, and the automatic information of the first set of protection device is adopted by default; when data with relative error larger than threshold exists, the data is archived and alarmed so as to eliminate defects in time, and an information selection link is not entered any more, so that the relative error of each path of residual information is ensured to be within the threshold; and if the relative errors between every two adjacent sensors are larger than the threshold value, giving an alarm prompt with overlarge errors based on the automatic information with high historical accuracy.
9. The substation automation information-based circuit breaker operation evaluation method according to any one of claims 1 to 8, wherein:
all items described in step 4.3 include: the method comprises the following steps of basic information of the transformer substation, weather, time, trip circuits and phases, protection actions, fault distance measurement results, fault current values, reclosing states and operators on duty.
10. A substation automation information-based circuit breaker operation evaluation system using the substation automation information-based circuit breaker operation evaluation method according to any one of claims 1 to 9, characterized by comprising:
the transformer substation basic information database comprises basic information of all transformer substations in a digital form;
the rule database comprises a protection device, a breaker action rule and a breaker state rule;
the data extraction module is used for reading the basic information of the transformer substation from a transformer substation basic information database when the accident tripping occurs, establishing a communication interface with intelligent electronic equipment in the transformer substation and extracting the automation information acquired by the intelligent electronic equipment;
the evaluation report generation module is used for evaluating the action of the circuit breaker by using the automatic information extracted by the data extraction module and generating a circuit breaker action evaluation report with a set format;
and the data output module is used for outputting the breaker action evaluation report generated by the evaluation report generation module.
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| CN202011218584.1A CN114447873A (en) | 2020-11-04 | 2020-11-04 | Breaker action evaluation method and system based on substation automation information |
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