CN113346448A - Protection fixed value granulation intelligent checking system based on big data for transformer substation - Google Patents
Protection fixed value granulation intelligent checking system based on big data for transformer substation Download PDFInfo
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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
Abstract
The application discloses a protection fixed value granulation intelligent checking system based on big data for a transformer substation, which comprises a fixed value list acquisition and identification unit, wherein one side of the fixed value list acquisition and identification unit is connected with a granulation processing unit, and one side of the granulation processing unit is connected with an intelligent checking unit; one side of the intelligent checking unit is connected with a CT saturation checking unit, and one side of the CT saturation checking unit is connected with a transformer neutral point grounding type checking module. This application utilizes miniaturation processing unit, intelligent check unit, CT saturation check unit, transformer neutral point to connect local formula check module, protection device data management unit and definite value protection unit to the comprehensive check of electric wire netting relay protection device definite value performance, can improve relay protection device definite value accuracy, and the electric wire netting accident hidden danger that foresees probably to appear can alleviate the work load of dispatching relevant personnel simultaneously, improves work efficiency, guarantees electric wire netting safety and stability and moves.
Description
Technical Field
The invention relates to the technical field of big data, in particular to a protection fixed value granulation intelligent checking system based on big data for a transformer substation.
Background
The transformer substation is a place for converting voltage and current, receiving electric energy and distributing electric energy in an electric power system, the transformer substation in a power plant is a boosting transformer substation, and is used for boosting the electric energy generated by a generator and then feeding the electric energy into a high-voltage power grid, the electric equipment in the transformer substation is divided into primary equipment and secondary equipment, the primary equipment is equipment for directly producing, conveying, distributing and using the electric energy and mainly comprises a transformer, a high-voltage circuit breaker, an isolating switch, a bus, a lightning arrester, a capacitor, a reactor and the like, the secondary equipment is equipment for measuring, monitoring, controlling and protecting the operation conditions of the primary equipment and the system, and the secondary equipment mainly comprises a relay protection device, an automatic device, a measurement and control device, a metering device, an automatic system and direct current equipment for providing power for the secondary equipment.
The existing relay protection fixed value online checking system for the transformer substation only analyzes main protection and backup protection fixed values from an OMS system, granulation analysis is not performed on all fixed value items of the fixed values of the protection devices, the fixed values of the field operation device have system parameters, control words and soft pressing plate fixed values besides the main protection fixed values and the backup protection fixed values, the fixed values have the characteristics of large workload, multiple types, inconsistent manufacturers of the protection devices, different protection action logics and the like, the possibility of error setting and error checking exists, the actual power grid structure is huge, whether the grounding mode of a neutral point of a transformer accords with distribution rules cannot be intuitively known, and meanwhile, the checking of the current fixed values mainly depends on manual checking in a fixed value circulation single system, the workload is large, and the error rate is high. Therefore, the intelligent protection and fixed value granulation checking system based on big data for the transformer substation is provided for solving the problems
Disclosure of Invention
The embodiment provides a protection fixed value granulation intelligent checking system based on big data for a transformer substation, which is used for solving the problems that the verification of a fixed value in the prior art mainly depends on manual verification in a fixed value single-circulation system, the workload is large, and the error rate is high.
The purpose of the invention is realized by the following technical scheme:
a protection fixed value granulation intelligent checking system based on big data for a transformer substation comprises a fixed value list acquisition and identification unit, wherein one side of the fixed value list acquisition and identification unit is connected with a granulation processing unit, and one side of the granulation processing unit is connected with an intelligent checking unit;
the intelligent checking unit is characterized in that one side of the intelligent checking unit is connected with a CT saturation checking unit, one side of the CT saturation checking unit is connected with a transformer neutral point grounding type checking module, one side of the transformer neutral point grounding type checking module is connected with a protection device data management unit, one side of the protection device data management unit is connected with a fixed value protection unit, and one side of the fixed value protection unit is connected with a database unit.
Furthermore, the setting value list acquisition and identification unit, the granulation processing unit, the intelligent checking unit, the CT saturation checking unit, the transformer neutral point grounding type checking module, the protection device data management unit and the setting value protection unit are all connected with the database unit.
Furthermore, one side of the protection device data management unit is connected with a protection constant value input module, and the other side of the protection device data management unit is connected with a constant value protection unit.
Furthermore, one side of the intelligent checking unit is connected with a fixed value checking experience base establishing module, and the other side of the intelligent checking unit is connected with the CT saturation checking unit.
Further, the fixed value list obtains the inside module that is equipped with fixed value list download module and download protection device stipulation of recognition cell, inside information acquisition module, information analysis module, information classification module, the information extraction module and the information conversion module of being equipped with of miniaturation processing unit.
Furthermore, a protection constant value standard format design module, a protection constant value data processing module, a protection constant value intelligent auditing module, a constant value data statistical analysis module and an auditing result display module are arranged in the intelligent checking unit.
Furthermore, a numerical value comparison module, a single set of protection fixed value item intelligent audit module, a same-side double-set protection fixed value associated audit module and a line two-side protection fixed value associated audit module are arranged inside the protection fixed value intelligent audit module, and a display module and a warning module are arranged inside the audit result display module.
Furthermore, a check experience base establishing module and a human-computer interaction module are arranged in the constant value check experience base establishing module, and the check experience base establishing module comprises a constant value principle base establishing module, a logic rule base establishing module, a constant value rule base establishing module and an expert experience base establishing module.
Furthermore, a fixed value information automatic identification module, a fixed value information analysis module and a fixed value information classification module are arranged in the protection fixed value data processing module, and fixed value information classification in the fixed value information classification module is classified according to the principle of equipment parameters, protection fixed values and protection control words, namely, soft pressing plates.
Further, the fixed value list information in the fixed value list acquisition and identification unit comprises an equipment parameter fixed value, a protection device numerical type fixed value, a protection device control word fixed value and a protection device soft pressing plate fixed value
The invention has the beneficial effects that:
the utility model provides an utilize miniaturation processing unit, intelligent check unit, CT saturation check unit, transformer neutral point meets local formula check module, protection device data management unit and definite value protection unit to existing electric network model and basic data such as real-time operation mode, adopt definite value single miniaturation technique, definite value intelligence audit technique, CT check technique, transformer neutral point meets local formula analysis technique and realizes checking the comprehensive of electric wire netting relay protection device definite value performance, can improve relay protection device definite value accuracy, the electric wire netting accident hidden danger that foresees probably appearing, simultaneously can alleviate the work load of scheduling relevant personnel, improve work efficiency, guarantee electric wire netting safety and stability and operation.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the present invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
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In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings, in which:
FIG. 1 is a general schematic view of an embodiment of the present application;
FIG. 2 is a schematic view of the interior of a granulation processing unit according to an embodiment of the present application;
fig. 3 is a schematic internal diagram of an intelligent checking unit according to an embodiment of the present application.
In the figure: 1. a setting value list obtaining and identifying unit, 2, a granulation processing unit, 3, an intelligent checking unit, 4, a CT saturation checking unit, 5, a transformer neutral point grounding mode checking module, 6, a protection device data management unit, 7, a setting value protection unit, 8, a database unit, 9, a protection setting value input module, 10, a setting value checking experience base establishing module, 11, a setting value list downloading module, 12, a module for downloading protection device protocols, 13, an information obtaining module, 14, an information analysis module, 15, an information classification module, 16, an information extraction module, 17, an information conversion module, 18, a protection setting value standard format design module, 19, a protection setting value data processing module, 20, a protection setting value intelligent auditing module, 21, a setting value data statistical analysis module, 22, an auditing result display module, 23 and a value comparison module, 24. the system comprises a single protection constant value item intelligent auditing module, a 25 same-side double protection constant value associated auditing module, a 26 line two-side protection constant value associated auditing module, a 27 display module, a 28 warning module, a 29 checking experience base establishing module, a 30 human-computer interaction module, a 31 constant value information automatic identification module, a 32 constant value information analysis module, a 33 constant value information classification module.
Detailed Description
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are illustrative of the invention only and are not limiting upon the scope of the invention.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The monitoring device in this embodiment may be applicable to various substations, for example, the following intelligent substation is provided in this embodiment, and the intelligent checking system in this embodiment may be used in the following intelligent substation.
The intelligent substation comprises a ceiling, cushion blocks, ventilating pipes, unpowered wind balls, a cabinet body, a cabinet door, a heat dissipation window, a control box, a heat dissipation fan, a protective frame, a protective net, a temperature detector and a sound insulation and noise reduction plate, wherein the cushion blocks are arranged on the inclined planes on the two sides of the ceiling, through holes are formed in the top surfaces of the cushion blocks and penetrate through the cushion blocks and the ceiling, the ventilating pipes are arranged in the through holes in the top surfaces of the cushion blocks, the unpowered wind balls are arranged on the top surfaces of the ventilating pipes, the ceiling is arranged on the top surface of the cabinet body, the cabinet door is arranged in front of the cabinet body and fixed with the cabinet body in a hinged mode, the heat dissipation window is arranged on the upper portion of the left side of the cabinet body, the control box is arranged in the middle of the left side of the cabinet body, the heat dissipation fan is arranged on the lower portion of the left side of the cabinet body, the protective frame is arranged outside the heat dissipation fan on the lower portion of the left side of the cabinet body, the protective net is arranged outside the ceiling and the cabinet body, the protective net is arranged on the inner walls of the ceiling and the cabinet body, and a temperature detector is arranged on the left side in the cabinet body. The control box comprises box body, arm-tie, safety lock, spout, through wires hole and control switch, be provided with the through wires hole in the box body, and two walls are provided with the spout about in the box body, set up the safety lock before the arm-tie left side, and control switch sets up in the box body, in both ends sand grip and the inserting spout about the arm-tie to realize that the box body is connected with the arm-tie. The cooling fan, the temperature detector and the control switch are connected with the power supply in series through power lines, and the control switch is composed of a control panel, a display screen, a single chip microcomputer and a circuit board. The utility model relates to an intelligent transformer substation, which not only can reduce noise, but also can prevent noise pollution by arranging a sound-proof noise-reducing plate on the inner wall of a cabinet body; the unpowered wind ball and the heat dissipation window are arranged, so that the ventilation effect in the cabinet body can be improved; the intelligent heat dissipation is carried out on the inner part of the cabinet by adopting a heat dissipation fan, a temperature detector and a control switch; the single chip microcomputer in the control switch is used for controlling the cooling fan, so that a temperature value can be set, the performance is stable, and the control is accurate, so that intelligent cooling is achieved; the control box is arranged outside the cabinet body, so that the operation is convenient; this transformer substation is fit for installing in remote area and mountain area, and theory of operation: a temperature value is set through a key on a control switch, a temperature detector detects the temperature in the cabinet body, and when the detected temperature value is lower than the set temperature, the cooling fan is started to be in a low wind level; when the detected temperature value is higher than the set temperature, the cooling fan is automatically switched to a strong wind shield; when the temperature is lower than the set temperature, automatically switching to a low wind gear; thereby keeping the temperature in the cabinet body normal; in the working process of the transformer substation, the generated noise is separated, adsorbed and reduced through the sound insulation and noise reduction plate.
Of course, the present embodiment may also be used in other substations. Here, details are not repeated, and the following describes the intelligent checking system according to the embodiment of the present application.
As shown in fig. 1-3, a protection fixed value granulation intelligent check system for a transformer substation based on big data comprises a fixed value list acquisition and identification unit 1, wherein one side of the fixed value list acquisition and identification unit 1 is connected with a granulation processing unit 2, and one side of the granulation processing unit 2 is connected with an intelligent check unit 3;
the intelligent checking unit 3 is connected with a CT saturation checking unit 4 on one side, the transformer neutral point grounding mode checking module 5 is connected on one side of the CT saturation checking unit 4, the protection device data management unit 6 is connected on one side of the transformer neutral point grounding mode checking module 5, the constant value protection unit 7 is connected on one side of the protection device data management unit 6, and the database unit 8 is connected on one side of the constant value protection unit 7.
The protection constant value can be intelligently checked through the granulation processing unit 2, the intelligent checking unit 3, the CT saturation checking unit 4, the transformer neutral point grounding type checking module 5, the protection device data management unit 6 and the constant value protection unit 7, the accuracy of the constant value of the relay protection device can be improved, the potential hazards of possible power grid accidents can be predicted, meanwhile, the workload of dispatching related personnel is reduced, the working efficiency is improved, and the safe and stable operation of a power grid is guaranteed.
The setting value list obtaining and identifying unit 1, the granulation processing unit 2, the intelligent checking unit 3, the CT saturation checking unit 4, the transformer neutral point grounding type checking module 5, the protection device data management unit 6 and the setting value protection unit 7 are all connected with the database unit 8, data information can be stored, input, output and the like through the database unit 8, the CT saturation checking unit 4 is used for checking the existing power grid real-time operation mode of the risk early warning system and the existing power grid model CT transformation ratio data basis on the basis of the relay protection setting value of the OS2 system, a parallel fast algorithm is adopted for calculating the maximum short-circuit current under the fault condition and comparing the maximum short-circuit current with the CT selection multiple to realize CT saturation checking, the transformer neutral point grounding type data basis of the transformer neutral point in the existing power grid real-time operation mode of the system can be checked through the relay protection setting value online through the transformer neutral point grounding type checking module 5, the number, rated capacity and zero sequence reactance value of neutral point grounding transformers are counted, the distribution characteristics of zero sequence current are analyzed, whether the distribution characteristics are consistent with a set grounding rule or not is judged, warning is realized on the condition that the distribution characteristics are not consistent with the set grounding rule, the protection devices can be classified according to manufacturers through the protection device data management unit 6, detailed version numbers and check codes are maintained for the types of the protection devices, a fixed value list, a setting instruction, a device use instruction and a fixed value single-mode board of different device types are classified and managed in a unified mode, quick inquiry can be carried out according to different conditions, and relevant data can be downloaded.
One side of the protection device data management unit 6 is connected with a protection fixed value input module 9, the other side of the protection device data management unit 6 is connected with a fixed value protection unit 7, and a protection fixed value can be input through the protection fixed value input module 9.
One side of the intelligent checking unit 3 is connected with a fixed value checking experience base establishing module 10, the other side of the intelligent checking unit 3 is connected with the CT saturation checking unit 4, the fixed value checking experience base establishing module 10 can enable the expert experience base to be divided into fixed value range comparison, fixed value size relation comparison, fixed value consistent relation comparison, fixed value logic relation comparison and the like according to different fixed value checking methods, adding, deleting and modifying operations of the fixed value checking rule knowledge base are facilitated, the fixed value rule knowledge base can be established in a file mode, and adding, deleting and modifying of the fixed value checking expert experience base are performed according to a certain rule.
The fixed value list acquisition and identification unit 1 is internally provided with a fixed value list downloading module 11 and a module 12 for downloading protection device protocols, the fixed value list downloading module 11 can access a provincial company WEB server in a transformer substation through a dispatching data network in a webpage mode, read a protection device fixed value list of a database server behind a firewall and download the protection device fixed value list to a local transformer substation, and the module 12 for downloading the protection device protocols can call the protocols of each protection device of the transformer substation; the granulation processing unit 2 is based on an OMS system, the granulation processing unit 2 acquires fixed value list information through the information acquisition module 13 when in use, analyzes the fixed value list information through the information analysis module 14, extracts key information such as fixed value item names, fixed values, units, original fixed values and the like through the information classification module 15, designs a standard format for granulation fixed value storage for various data extracted from the fixed value list through the information conversion module 17, and the storage file of the granulation fixed value is an xml or cime format file.
The intelligent checking unit 3 is internally provided with a protection fixed value standard format design module 18, a protection fixed value data processing module 19, a protection fixed value intelligent checking module 20, a fixed value data statistical analysis module 21 and a checking result display module 22, different fixed value items of different protection manufacturers can be unified through the protection fixed value standard format design module 18, fixed values in the system are converted into a standard format, the fixed values are divided into four parts, namely an equipment parameter fixed value, a numerical value fixed value, a control word fixed value and a soft pressing plate fixed value, an automatic identification function of the fixed value of the protection device can be developed through the protection fixed value data processing module 19, and basic data support is provided for intelligent anti-error checking of the protection fixed value. The fixed value items of different types of protection are different, so that fixed value data need to be analyzed and are in butt joint with the fixed value names in a standard format to obtain standard fixed value names, the condition that the names of the same fixed value items are not consistent is avoided, intelligent auditing functions aiming at a fixed value standard range, single set of protection logic, double set of protection logic, line two-side association and the like can be designed and developed through the protection fixed value intelligent auditing module 20, the numerical distribution rule statistics of the protection fixed value can be carried out according to the historical accumulation of the fixed value auditing result through the statistical analysis module 21 of the fixed value data, the distribution characteristics of the relay protection fixed value of the regional power grid can be summarized, the fixed value with insufficient auditing can be colored and displayed according to the auditing requirement through the auditing result display module 22, and the distribution rule of the fixed value can be visually displayed in a curve mode.
The intelligent checking module 20 for protection constant value is internally provided with a value comparison module 23, a single set of intelligent checking module 24 for protection constant value items, a double set of related checking module 25 for protection constant value items on the same side and a related checking module 26 for protection constant value items on two sides of a line, the value comparison module 23 can compare the analyzed constant value with the standard constant value range, and judge whether the analyzed constant value is in the standard range, if not, an alarm prompt is given, the single set of intelligent checking module 24 for protection constant value items can check the constant value of a single set of protection device, and the basic function module of the intelligent checking system for relay protection constant value items is mainly realized as follows: the reasonable interval judgment of the value of the single constant value item and the logical relation examination of the related constant value item, the reasonable interval of the value of the single constant value item refers to the reasonable interval determined by experience or the requirement of a protection device, basic parameters such as line length, impedance angle and the like can determine the reasonable interval according to experience and voltage level, the problem of constant value can be judged when the constant value data of the device is positioned outside the interval, and an alarm is given, the main function of the examination of the reasonable interval of the single constant value is to prevent the constant value from being wrongly set due to decimal point error and the like, the same-side double-set protection constant value related examination module 25 can obtain two sets of protection device constant values at the same side of the line protection and examine the related items of the same-side double-set protection constant values, the examination can be carried out through the related constant value items between the double-set protections, and the inconsistent constant value items of the double-set protection can be found for alarming, the checking of the double protection sets at the same side comprises checking and alarming for the same constant value items of the double protection sets, the correlation checking of the protection constant values at the two sides of the line can be mainly used for checking the consistency of the constant values of basic equipment parameters at the two sides of the line, the correlation of line identification codes, the correlation of related control words and the like through the correlation checking module 26 of the protection constant values at the two sides of the line, thereby checking and alarming the constant value data to the maximum extent, the checking result display module 22 is internally provided with a display module 27 and a warning module 28, the warning can be realized through the display module 27 through a visual means, the simplified warning information or detailed warning content can be selectively displayed according to the requirement, meanwhile, the visual display of various forms such as lists, curves, vector diagrams, two-dimensional colored diagrams and animations can be supported through the warning module 28, the visual warning can be performed on the normal state through the warning, The abnormal states are colored respectively.
The fixed value checking experience base establishing module 10 is internally provided with a checking experience base establishing module 29 and a man-machine interaction module 30, the checking experience base establishing module 29 comprises a fixed value principle base establishing module, a logic rule base establishing module, a fixed value rule base establishing module and an expert experience base establishing module, the fixed value rule base establishing module 10 can establish the fixed value rule experience base in a file mode, the fixed value checking rule experience base is added, deleted and modified according to a certain rule, and after the fixed value rule is changed, a system program does not need to be upgraded, the fixed value checking rule experience base can be decoupled with the system, so that the fixed value checking rule experience base can be adaptively added, deleted and modified, the operation is easy, and the operation is more flexible.
The protection fixed value data processing module 19 is internally provided with a fixed value information automatic identification module 31, a fixed value information analysis module 32 and a fixed value information classification module 33, the fixed value information classification in the fixed value information classification module 33 is classified according to the principles of equipment parameters, protection fixed values and protection control words, namely soft pressing plates, the fixed value information can be identified through the fixed value information automatic identification module 31, the fixed value information of different protections can be uniformly analyzed into a uniform format through the fixed value information analysis module 32, the fixed value information mainly comprises a protection device name, a station name, a protected equipment name, a fixed value item and a fixed value, the fixed value item comprises protection fixed value names of various types of equipment, the fixed value is a numerical value corresponding to each fixed value item, the classified fixed value item can be subjected to fuzzy matching with the fixed value in a standard format through the fixed value information classification module 33, the completely same constant value items are automatically matched, the incompletely same constant value items are manually matched, and the matching range is subject to analysis of the constant value.
The setting value list information in the setting value list acquisition and identification unit 1 comprises an equipment parameter setting value, a protection device numerical value type setting value, a protection device control word setting value and a protection device soft pressing plate setting value.
When the device is used, the fixed value list information is acquired through the fixed value list acquisition and identification unit 1, and the extraction and recording methods of different fixed value item names and fixed value display positions can be analyzed through the format of the fixed value list of different device models through the granulation processing unit 2. Secondly, designing a man-machine interaction interface and a data storage mode according to the research and analysis result. And finally, extracting definite value single key information, such as a definite value single number, a station name, an equipment name, a protection device model, a CT transformation ratio, a PT transformation ratio and the like, and definite value detailed data, such as a definite value item name, a definite value, a unit, an original definite value and the like, according to the analyzed definite value single format data information corresponding to the device model. According to various data extracted from a fixed value list, a standard format of granular fixed value storage is designed, the storage file of the granular fixed value is an xml or cime format file, the fixed value can be intelligently checked through an intelligent checking unit 3, the maximum short-circuit current under the fault condition can be calculated through a parallel rapid algorithm on the basis of the existing power grid real-time operation mode and power grid model CT transformation ratio data through a CT saturation checking unit 4, CT saturation checking is realized by comparing with CT selection multiples, the CT saturation checking unit 4 firstly obtains the CT transformation ratio primary value and the current transformer type of each device when in use, respectively obtains the CT transformation ratio primary value of different types of protection at each side for a transformer, then obtains the power grid real-time operation mode from an EMS platform, and calculates the maximum short-circuit current and the maximum zero sequence current which are passed by each current transformer. And finally, checking whether the CT is saturated or not through the primary transformation ratio of the CT and the type of the current transformer. The potential hazards found are early warned in time, a dispatching department is prompted to adjust the operation mode or replace a current transformer in time, the number, the rated capacity and the zero sequence reactance value of the neutral point grounding transformer in the existing power grid real-time operation mode of the on-line system can be counted through a grounding mode data base of the neutral point grounding transformer in a relay protection fixed value on-line checking system through a transformer neutral point grounding mode checking module 5, the distribution characteristics of the zero sequence current are analyzed, whether the distribution characteristics are consistent with the set grounding rule is judged, warning is realized on the condition that the distribution characteristics are not consistent, the protection devices can be classified according to manufacturers through a protection device data management unit 6, each protection device model maintains detailed version numbers and checking codes, fixed value lists, setting instructions, device use instructions and fixed value single mode boards of different device models are classified and managed in a unified way, and quick inquiry can be carried out according to different conditions, the related data can be downloaded, the fixed value audit rule knowledge base can be decoupled with the system through the fixed value check experience base establishing module 10, the operation of adding, deleting and modifying the fixed value audit rule knowledge base is realized without upgrading the system, the interaction form of the fixed value audit rule knowledge base with intuition and strong operability can be realized, so that protection workers can formulate a set of complete fixed value audit rule expert system base according to the needs, the expert experience of relay protection profession is converted into the process of simulating artificial intelligent audit from the form of the rule, the audit results, the deviation degree, the alarm information and the like of the protection fixed value items of different devices of different equipment form a probability distribution function to obtain a distribution rule, the statistics and visual display of the result are realized, the fixed value accuracy of the relay protection device can be improved, the possible power grid hidden trouble can be predicted, and the workload of the related personnel can be reduced at the same time, the working efficiency is improved, and the safe and stable operation of the power grid is ensured.
The utility model provides an utilize miniaturation processing unit, intelligent check unit, CT saturation check unit, transformer neutral point meets local formula check module, protection device data management unit and definite value protection unit to existing electric network model and basic data such as real-time operation mode, adopt definite value single miniaturation technique, definite value intelligence audit technique, CT check technique, transformer neutral point meets local formula analysis technique and realizes checking the comprehensive of electric wire netting relay protection device definite value performance, can improve relay protection device definite value accuracy, the electric wire netting accident hidden danger that foresees probably appearing, simultaneously can alleviate the work load of scheduling relevant personnel, improve work efficiency, guarantee electric wire netting safety and stability and operation.
It is well within the skill of those in the art to refer to circuits and individual electronic components and modules as prior art and not to be reiterated.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a protection definite value miniaturation intelligence check system for transformer substation based on big data which characterized in that: the system comprises a fixed value list acquisition and identification unit (1), wherein one side of the fixed value list acquisition and identification unit (1) is connected with a granulation processing unit (2), and one side of the granulation processing unit (2) is connected with an intelligent checking unit (3);
the intelligent checking unit (3) is connected with a CT saturation checking unit (4) on one side, the CT saturation checking unit (4) is connected with a transformer neutral point grounding mode checking module (5) on one side, the transformer neutral point grounding mode checking module (5) is connected with a protection device data management unit (6) on one side, the protection device data management unit (6) is connected with a constant value protection unit (7) on one side, and the constant value protection unit (7) is connected with a database unit (8) on one side.
2. The big-data-based protection fixed-value granulation intelligent checking system for the substation according to claim 1, wherein: the constant value list acquisition and identification unit (1), the granulation processing unit (2), the intelligent checking unit (3), the CT saturation checking unit (4), the transformer neutral point grounding mode checking module (5), the protection device data management unit (6) and the constant value protection unit (7) are all connected with the database unit (8).
3. The big-data-based protection fixed-value granulation intelligent checking system for the substation according to claim 1, wherein: one side of the protection device data management unit (6) is connected with a protection constant value input module (9), and the other side of the protection device data management unit (6) is connected with a constant value protection unit (7).
4. The big-data-based protection fixed-value granulation intelligent checking system for the substation according to claim 1, wherein: one side of the intelligent checking unit (3) is connected with a fixed value checking experience base establishing module (10), and the other side of the intelligent checking unit (3) is connected with the CT saturation checking unit (4).
5. The big-data-based protection fixed-value granulation intelligent checking system for the substation according to claim 1, wherein: the fixed value list acquisition and identification unit (1) is internally provided with a fixed value list downloading module (11) and a module (12) for downloading a protection device protocol, and the granulation processing unit (2) is internally provided with an information acquisition module (13), an information analysis module (14), an information classification module (15), an information extraction module (16) and an information conversion module (17).
6. The big-data-based protection fixed-value granulation intelligent checking system for the substation according to claim 1, wherein: and a protection constant value standard format design module (18), a protection constant value data processing module (19), a protection constant value intelligent auditing module (20), a constant value data statistical analysis module (21) and an auditing result display module (22) are arranged in the intelligent checking unit (3).
7. The big-data-based protection fixed-value granulation intelligent checking system for the substation according to claim 6, wherein: the intelligent audit module (20) for the protection constant value is internally provided with a numerical comparison module (23), a single set of intelligent audit module (24) for the protection constant value item, a double set of related audit module (25) for the protection constant value item on the same side and a related audit module (26) for the protection constant value item on the two sides of the line, and the audit result display module (22) is internally provided with a display module (27) and a warning module (28).
8. The big-data-based protection fixed-value granulation intelligent checking system for the substation according to claim 4, wherein: the fixed value checking experience base establishing module (10) is internally provided with a checking experience base establishing module (29) and a man-machine interaction module (30), and the checking experience base establishing module (29) comprises a fixed value principle base establishing module, a logic rule base establishing module, a fixed value rule base establishing module and an expert experience base establishing module.
9. The big-data-based protection fixed-value granulation intelligent checking system for the substation according to claim 6, wherein: a fixed value information automatic identification module (31), a fixed value information analysis module (32) and a fixed value information classification module (33) are arranged in the protection fixed value data processing module (19), and fixed value information classification in the fixed value information classification module (33) is classified according to the principle of equipment parameters, protection fixed values and protection control words, namely soft pressing plates.
10. The big-data-based protection fixed-value granulation intelligent checking system for the substation according to claim 1, wherein: the constant value list information in the constant value list acquisition and identification unit (1) comprises an equipment parameter constant value, a protection device numerical value type constant value, a protection device control word constant value and a protection device soft pressing plate constant value.
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