CN114172112A - Relay protection constant value automatic checking and correcting device and method based on intelligent identification technology - Google Patents
Relay protection constant value automatic checking and correcting device and method based on intelligent identification technology Download PDFInfo
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- CN114172112A CN114172112A CN202111352067.8A CN202111352067A CN114172112A CN 114172112 A CN114172112 A CN 114172112A CN 202111352067 A CN202111352067 A CN 202111352067A CN 114172112 A CN114172112 A CN 114172112A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/006—Calibration or setting of parameters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0092—Details of emergency protective circuit arrangements concerning the data processing means, e.g. expert systems, neural networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00034—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving an electric power substation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Artificial Intelligence (AREA)
- Evolutionary Computation (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention relates to the technical field of substation maintenance, and particularly discloses a relay protection fixed value automatic checking and correcting device and method based on an intelligent identification technology. The invention has the beneficial effects that: the intelligent identification of the constant value list of the relay protection system of the transformer substation is realized, so that the automatic modification and checking of the protection constant value are completed, and the false detection and the missing detection during manual correction are reduced. The application of the project achievement can greatly reduce the workload and labor intensity of operation and maintenance personnel, improve the operation and maintenance inspection work efficiency and the technical level of the transformer substation, and has important practical significance.
Description
Technical Field
The invention relates to the technical field of substation maintenance, in particular to a relay protection fixed value automatic checking and correcting device and method based on an intelligent identification technology.
Background
Currently, a relay protection department generally adopts special relay protection setting calculation software to calculate a constant value of a protection device, then generates a protection constant value list, and issues the protection constant value list to each plant station after verification and approval, and the protection constant value list is executed by field personnel. Although the domestic branch network province bureau realizes the electronic circulation of operations such as generation, auditing and approval of the fixed value list in a relay protection department of a dispatching center, after the flow of the fixed value list in the relay protection department is finished, the fixed value list to be executed still needs to be printed out to form a paper version, and then field workers manually record various protection fixed values. This mode of operation inevitably suffers from the following problems:
1) the fixed value list issuing and executing process relates to a plurality of manual operation links, and when a large amount of data is input, wrong fixed values are possibly input, so that the accuracy of fixed value information is difficult to ensure.
2) The dispatching center can not directly manage the fixed value of the actual operation inside the protection device, so once field workers fail to fix the fixed value, the dispatching center is difficult to quickly find and correct, and the electric power system has potential safety hazards.
3) The fixed value checking work needs to be finished manually, and the fixed value checking performed by regular organization is difficult to cover each set of protection device.
In recent years, with the rapid development of network communication technology and the wide application of a relay protection fault information system in a power system, the fault information system can be conveniently used for obtaining the actual operation fixed value of a relay protection device, and technical conditions are provided for realizing the automatic checking of the relay protection fixed value. The system comprises a fault information system, a regional power grid protection constant value on-line checking device, a regional power grid protection constant value single network management system, a relay protection constant value on-line checking device and a relay protection constant value on-line checking device, wherein the fault information system is used for obtaining a field operation constant value of a relay protection device, the regional power grid protection constant value single network management system is used for obtaining a issued formal constant value, the regional power grid relay protection constant value on-line checking device is developed and completed based on data provided by the two systems, and the actual operation constant value can be automatically checked with the issued constant value, so that the correctness of the operation constant value of the relay protection device is ensured, the operation management level of relay protection is improved, and the safe and stable operation of a power system is guaranteed.
The relay protection fixed value on-line checking technology is to compare a corresponding real-time operation fixed value with a distributed calculation fixed value, but some key technical problems need to be solved in actual operation. For example:
1) establishing an electronic fixed value library, converting a fixed value sheet which is stored and circulated in a paper document form at present into an electronic fixed value sheet, which is a basic premise for realizing automatic fixed value checking;
2) the fixed value list generation and the sword approval execution need certain time, and feedback information of the fixed value list rotation condition is needed for obtaining the calculated fixed value;
3) the names of the fixed value items in the setting calculation system and the fault protection information system are not consistent, and the matching and the checking can be carried out only by analyzing the naming rule of the operation fixed value information and the operation fixed value information.
Some preliminary achievements exist in the theoretical research of automatic correction of relay protection setting values of transformer substations by domestic and foreign research institutions, but the practical research is few, the main reason is that the accuracy and reliability of automatic correction of the setting values are still rich and are not approved by related users, and after retrieval, mature products which can be identified and corrected about relay protection setting value volumes in ancient places are not reported.
Therefore, it is necessary to provide a new technical solution to solve the above technical problems.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the automatic checking and correcting device for the relay protection setting value based on the intelligent identification technology, which realizes the intelligent identification of the setting value list of the substation relay protection system, thereby completing the automatic correction and checking of the protection setting value and reducing the false detection and missing detection during manual correction.
The above object of the present invention is achieved by the following technical solutions:
the relay protection constant value automatic checking and correcting device based on the intelligent identification technology comprises a single-chip microcomputer processing module, a communication module used for collecting information of a field relay protection device, a power supply module and a control module, wherein the communication module is in communication connection with the single-chip microcomputer processing module, the single-chip microcomputer processing module is in communication connection with a constant value display and alarm module, and the power supply module is used for providing electric energy for the communication module, the single-chip microcomputer processing module and the constant value display and alarm module; the constant value display and alarm module at least comprises a display, an alarm indicator light and a buzzer.
By adopting the technical scheme: the serial port data line is communicated with a field relay protection device, data information in the field relay protection device is firstly obtained, and then the data is analyzed and processed by a single chip microcomputer in a fixed value calibration device, namely, the transmitted data information in the field relay protection device is accurately and effectively compared with original data information stored in the calibration device. And finally, displaying the comparison result on a display screen, and carrying out sound-light alarm when the data comparison is inconsistent so as to remind field operators to pay attention for further manual confirmation and subsequent comprehensive treatment.
Furthermore, the intelligent alarm device further comprises an insulating shell, the power supply module, the communication module and the single chip microcomputer module are installed in the insulating shell, and the display, the alarm indicator lamp and the buzzer are exposed out of the upper surface of the insulating shell through the holes.
By adopting the technical scheme: the working reliability and the portability are improved, and meanwhile, the whole device is subjected to waterproof treatment.
Further, the single chip microcomputer processing module adopts a 32-bit STM32F103 single chip microcomputer.
The invention discloses a relay protection fixed value automatic checking and correcting method based on an intelligent identification technology, which comprises the following steps:
s1, recognizing characters and tables on the fixed-value single picture by using an OCR intelligent recognition technology, improving the character recognition rate by using an error correction library error correction function, and storing an error correction result into a fixed-value model;
s2, matching the fixed value configuration and the calling fixed value configuration in the SCD with the fixed value list, and realizing data communication of different protection devices by using the calling and modifying technology of protection fixed values;
and S3, automatically checking and correcting all protection setting values of the intelligent substation and the conventional substation by using the relay protection setting value automatic checking and correcting device based on the intelligent identification technology.
By adopting the technical scheme: through research and utilization of a fixed value list recognition and processing technology, characters and tables on a fixed value single picture are recognized by utilizing an OCR intelligent recognition technology, the character recognition rate is improved by adopting an error correction library error correction function, and an error correction result is stored in a fixed value model. The method is characterized in that the calling and modifying technology of the protection setting value is researched and utilized to realize data communication of different protection devices, the automatic checking and modifying technology of the protection setting value is researched, and the automatic checking and modifying device is developed to realize the automatic checking and modifying of all the protection setting values of the intelligent substation and the conventional substation.
Further, the OCR intelligent recognition comprises the following steps:
1) image input and preprocessing: carrying out binarization, noise removal and inclination correction on different image formats;
2) cutting the layout: segmenting the document pictures, and performing layout analysis;
3) character recognition;
4) and (3) page recovery: for recognized characters, the pattern arrangement of the original document picture needs to be restored, the paragraphs, the positions and the sequence are ensured to be unchanged, and the process is the layout restoration.
5) Character proofreading and post-processing
According to the relation of specific language context, character recognition result needs to be corrected manually or character error correction is carried out by adopting recognition error correction library, the corrected characters are corrected and finally output.
In summary, the invention includes at least one of the following beneficial technical effects:
1. the intelligent identification of the constant value list of the relay protection system of the transformer substation is realized, so that the automatic modification and checking of the protection constant value are completed, and the false detection and the missing detection during manual correction are reduced. The application of the project achievement can greatly reduce the workload and labor intensity of operation and maintenance personnel, improve the operation and maintenance inspection work efficiency and the technical level of the transformer substation, and has important practical significance.
2. An OCR character recognition technology is introduced, a portable device for automatically checking and correcting the relay protection constant value based on the OCR character recognition technology is developed, intelligent recognition of a constant value list of a transformer substation relay protection system is achieved, and false detection and missing detection during manual correction are reduced; meanwhile, abundant communication interfaces can be in data interactive communication with various types of protection devices, and can stably and reliably call a fixed value and modify the fixed value, so that the technical level of operation and maintenance management of the transformer substation is effectively improved, and the safe and reliable operation of a secondary system of the transformer substation is ensured.
Drawings
Fig. 1 is a schematic diagram of a frame structure of an automatic checking and correcting device for relay protection constant values based on an intelligent identification technology.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example one
Referring to fig. 1, the automatic checking and correcting device for relay protection setting values based on the intelligent identification technology in this embodiment includes a single-chip microcomputer processing module, a communication module for collecting information of a field relay protection device, the communication module is in communication connection with the single-chip microcomputer processing module, the single-chip microcomputer processing module is in communication connection with a setting value display and alarm module, and the device further includes a power supply module for supplying electric energy to the communication module, the single-chip microcomputer processing module and the setting value display and alarm module; the fixed value display and alarm module at least comprises a display, an alarm indicator light and a buzzer, wherein the single chip microcomputer processing module adopts a 32-bit STM32F103 single chip microcomputer. The serial port data line is communicated with a field relay protection device, data information in the field relay protection device is firstly obtained, and then the data is analyzed and processed by a single chip microcomputer in a fixed value calibration device, namely, the transmitted data information in the field relay protection device is accurately and effectively compared with original data information stored in the calibration device. And finally, displaying the comparison result on a display screen, and carrying out sound-light alarm when the data comparison is inconsistent so as to remind field operators to pay attention for further manual confirmation and subsequent comprehensive treatment.
In order to improve the safety and the use convenience, the device further comprises an insulating shell, the power supply module, the communication module and the single chip microcomputer module are installed in the insulating shell, and the display, the alarm indicator lamp and the buzzer are exposed out of the upper surface of the insulating shell through the holes. The working reliability and the portability are improved, and meanwhile, the whole device is subjected to waterproof treatment.
The invention discloses a relay protection fixed value automatic checking and correcting method based on an intelligent identification technology, which comprises the following steps:
s1, recognizing characters and tables on the fixed-value single picture by using an OCR intelligent recognition technology, improving the character recognition rate by using an error correction library error correction function, and storing an error correction result into a fixed-value model;
s2, matching the fixed value configuration and the calling fixed value configuration in the SCD with the fixed value list, and realizing data communication of different protection devices by using the calling and modifying technology of protection fixed values;
and S3, automatically checking and correcting all protection setting values of the intelligent substation and the conventional substation by using the relay protection setting value automatic checking and correcting device based on the intelligent identification technology.
Through research and utilization of a fixed value list recognition and processing technology, characters and tables on a fixed value single picture are recognized by utilizing an OCR intelligent recognition technology, the character recognition rate is improved by adopting an error correction library error correction function, and an error correction result is stored in a fixed value model. The method is characterized in that the calling and modifying technology of the protection setting value is researched and utilized to realize data communication of different protection devices, the automatic checking and modifying technology of the protection setting value is researched, and the automatic checking and modifying device is developed to realize the automatic checking and modifying of all the protection setting values of the intelligent substation and the conventional substation.
Further, the OCR intelligent recognition comprises the following steps:
1) image input and preprocessing: carrying out binarization, noise removal and inclination correction on different image formats;
2) cutting the layout: segmenting the document pictures, and performing layout analysis;
3) character recognition;
4) and (3) page recovery: for recognized characters, the pattern arrangement of the original document picture needs to be restored, the paragraphs, the positions and the sequence are ensured to be unchanged, and the process is the layout restoration.
5) Character proofreading and post-processing
According to the relation of specific language context, character recognition result needs to be corrected manually or character error correction is carried out by adopting recognition error correction library, the corrected characters are corrected and finally output.
The fixed value list identification and processing technology is researched, a paper fixed value list is scanned into an electronic file picture, and then characters and tables on the fixed value list are identified by using an OCR (optical character recognition) technology in artificial intelligence.
And constant value lists in different areas, different word, excel and pdf forms are identified by a certain rule and stored in a standard constant value library.
The studied error correction function based on the error correction lexicon: aiming at characters such as numbers, punctuation marks, special symbols and the like contained in constant value content, under the condition that the recognition rate of the picture is low through artificial intelligence, character error correction is carried out by using a recognition error correction library, and the error correction capability of converting various character pictures into system recognizable text formats is improved.
The studied matching technology of the fixed value configuration and the calling fixed value configuration and the fixed value list in the SCD comprises the following steps: considering the fixed value configuration in the SCD or the fixed value configuration called from the device, the name of the fixed value is usually inconsistent with the name in the issued protection fixed value list, aiming at the phenomenon, fuzzy matching and intelligent algorithms are adopted to match the fixed value items one by one, and a foundation is laid for the comparison and modification of the fixed value.
The technology for calling and modifying the protection constant value in the researched intelligent substation comprises the following steps: although protection in the intelligent substation is MMS communication, different protection manufacturers have different understandings of IEC61850, and particularly, the communication models are established with larger differences, so that the problem of compatibility of communication with different manufacturers and different devices needs to be considered. Therefore, research on technologies of MMS communication, configuration calling of protection, constant value calling, constant value modification and the like with protection of the intelligent substation needs to be carried out.
The calling and modifying technology of the protection constant value in the conventional power transformation is researched: protection communication protocols in a conventional transformer substation are various in types, complex in interfaces, and summarized, there are more than 10 common protocols such as serial port IEC103, south rui ethernet 103, south yu ethernet 103, square ethernet 103, and IEC61850, and at present, the comparison rate of the conventional transformer substation is very high, and the conventional transformer substation is necessary to be compatible with verification and modification of a fixed value, so that different protocols need to be adopted for protection of the conventional transformer substation for communication.
The technical scheme of automatic checking and modifying of the protection constant value is researched: the method comprises the steps of configuring or importing an SCD file through a calling device, establishing mapping with a fixed value list through a certain rule to form a device model, communicating with the device through different protocols, intelligently comparing the called fixed value with the fixed value in the fixed value list, giving a red prompt if the called fixed value is inconsistent with the fixed value in the fixed value list, and automatically correcting the device fixed value according to requirements under the condition of permission.
Research into portable debugging devices that adapt to a variety of communication interfaces: the communication interfaces of relay protection in the transformer substation are different in communication mode, particularly conventional transformer substations are different in range, portable devices need to be customized for the interfaces, and the portable devices developed by projects can meet the requirements of different communication interfaces and can meet the requirements of storage and data processing of a plurality of transformer substation configurations.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (6)
1. The relay protection constant value automatic checking and correcting device based on the intelligent identification technology is characterized by comprising a single chip microcomputer processing module and a communication module used for collecting information of a field relay protection device, wherein the communication module is in communication connection with the single chip microcomputer processing module, the single chip microcomputer processing module is in communication connection with a constant value display and alarm module, and the relay protection constant value automatic checking and correcting device further comprises a power supply module which provides electric energy for the communication module, the single chip microcomputer processing module and the constant value display and alarm module.
2. The automatic checking and correcting device for relay protection constant values based on intelligent identification technology of claim 1, wherein the constant value display and alarm module at least comprises a display, an alarm indicator light and a buzzer.
3. The automatic checking and correcting device for the relay protection constant value based on the intelligent identification technology as claimed in claim 2, further comprising an insulating housing, wherein the power supply module, the communication module and the single chip microcomputer module are mounted in the insulating housing, and the display, the alarm indicator lamp and the buzzer are exposed out of the upper surface of the insulating housing through holes.
4. The automatic checking and correcting device for the relay protection fixed value based on the intelligent identification technology as claimed in any one of claims 1 to 3, wherein the single chip microcomputer processing module adopts a 32-bit STM32F103 single chip microcomputer.
5. The automatic checking and correcting method for the relay protection fixed value based on the intelligent identification technology is characterized by comprising the following steps of:
s1, recognizing characters and tables on the fixed-value single picture by using an OCR intelligent recognition technology, improving the character recognition rate by using an error correction library error correction function, and storing an error correction result into a fixed-value model;
s2, matching the fixed value configuration and the calling fixed value configuration in the SCD with the fixed value list, and realizing data communication of different protection devices by using the calling and modifying technology of protection fixed values;
and S3, automatically checking and correcting all protection setting values of the intelligent substation and the conventional substation by using the relay protection setting value automatic checking and correcting device based on the intelligent identification technology.
6. The automatic checking and correcting method for the relay protection constant value based on the intelligent recognition technology as claimed in claim 5, wherein the OCR intelligent recognition comprises the following steps:
1) image input and preprocessing: carrying out binarization, noise removal and inclination correction on different image formats;
2) cutting the layout: segmenting the document pictures, and performing layout analysis;
3) character recognition;
4) and (3) page recovery: for recognized characters, the pattern arrangement of the original document picture needs to be restored, the paragraphs, the positions and the sequence are ensured to be unchanged, and the process is the layout restoration.
5) Character proofreading and post-processing
According to the relation of specific language context, character recognition result needs to be corrected manually or character error correction is carried out by adopting recognition error correction library, the corrected characters are corrected and finally output.
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2021
- 2021-11-16 CN CN202111352067.8A patent/CN114172112A/en active Pending
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| JPH10261040A (en) * | 1998-01-14 | 1998-09-29 | Toho Business Kanri Center:Kk | Ocr system |
| CN110854807A (en) * | 2019-11-22 | 2020-02-28 | 国网河北省电力有限公司电力科学研究院 | New energy relay protection intelligent checking and early warning system based on OCR technology |
| CN111985500A (en) * | 2020-07-28 | 2020-11-24 | 国网山东省电力公司禹城市供电公司 | Method, system and device for checking relay protection constant value input |
| CN112436477A (en) * | 2020-11-10 | 2021-03-02 | 云南电网有限责任公司昆明供电局 | Instrument is checked fast to relay protection device definite value of transformer substation |
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