CN117081234A - Intelligent substation safety measure checking expert system - Google Patents
Intelligent substation safety measure checking expert system Download PDFInfo
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- CN117081234A CN117081234A CN202310775669.7A CN202310775669A CN117081234A CN 117081234 A CN117081234 A CN 117081234A CN 202310775669 A CN202310775669 A CN 202310775669A CN 117081234 A CN117081234 A CN 117081234A
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- 238000000034 method Methods 0.000 claims description 25
- 238000002955 isolation Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 6
- 230000018109 developmental process Effects 0.000 claims description 4
- 230000008140 language development Effects 0.000 claims description 3
- 238000003825 pressing Methods 0.000 abstract description 43
- 230000009471 action Effects 0.000 abstract description 6
- 241000272814 Anser sp. Species 0.000 description 11
- 238000012423 maintenance Methods 0.000 description 11
- 238000004891 communication Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000009133 cooperative interaction Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Classifications
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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
- H02J13/00002—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 characterised by monitoring
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/20—Administration of product repair or maintenance
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/06—Electricity, gas or water supply
-
- 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
- H02J13/00006—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 characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
-
- 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
Abstract
The invention discloses an intelligent substation safety measure checking expert system, which is characterized in that: the expert system mainly comprises a comprehensive data module, a knowledge base module, an inference engine module, a man-machine interface module and an interpreter module. The overhaul pressing plate of the intelligent station protection device is locked for relevant protection actions during overhaul, the protection device, the intelligent terminal and the merging unit are all provided with the overhaul pressing plate, the combination of the overhaul pressing plates among different intelligent electronic equipment has different action actions, and when in overhaul operation, an overhaul worker needs to fully realize the cooperation between the overhaul pressing plate and the soft pressing plate so as to avoid misoperation of the protection device.
Description
Technical Field
The invention relates to the technical field of intelligent substation equipment, in particular to an intelligent substation safety measure checking expert system.
Background
In order to meet the development requirements of the intelligent power grid, intelligent substations are built at home, and many points to be perfected are left in the related technical aspects of the intelligent substations. The intelligent substation is different from the traditional substation, is a basic link and an important node of an intelligent power grid, is formed by combining advanced, reliable, energy-saving, environment-friendly and integrated equipment, takes a high-speed network communication platform as an information transmission basis, automatically completes basic functions such as information acquisition, measurement, control, protection, metering and monitoring, and can support advanced application functions such as real-time automatic control, intelligent regulation, online analysis decision, collaborative interaction and the like of the power grid as required.
The comprehensive automation of the traditional transformer substation is essentially different from that of the current intelligent transformer substation, referring to fig. 1, communication is realized between a computer monitoring system of a station control layer in the traditional transformer substation and a protection measurement and control device of a spacer layer through IEC-103 protocol, and spacer layer equipment is connected with primary equipment such as a transformer of a process layer through cables. For the intelligent substation, the communication among all layers adopts a unified IEC-61850 protocol, and the communication is realized through a high-speed Ethernet.
Because the intelligent transformer station adopts a plurality of digital intelligent devices, compared with the traditional transformer station, the secondary system can be greatly simplified in structure, and each intelligent device can realize data transmission and reception only by being connected to a communication network, and the complex secondary loop cable connection is not required to be configured as in the traditional transformer station. In an intelligent substation, it is generally defined that the party sending the data message is the "publisher" and the party receiving the message is the "subscriber". Which subscribers the publisher's data is sent to is then determined by the corresponding profile and assigned by the route to the correct subscribers based on the address. Therefore, no change is made to the secondary system physical wiring, whether the connection between the devices is changed or the device service is taken out of operation. In order to correspond to the physical structure of the secondary circuit of the traditional transformer substation, the intelligent transformer substation introduces the concepts of a virtual terminal, a soft pressing plate and the like. As shown in fig. 2, when the merging unit needs to be overhauled, the merging unit itself must be taken out of operation, and an overhauling hard pressing plate of the equipment is put into operation during overhauling. However, before the hard pressing plate is put into the maintenance of the merging unit, the soft pressing plate of the relay protection device connected with the merging unit and used for receiving the message of the merging unit is firstly withdrawn, otherwise, the relay protection device is likely to cause misoperation of the relay protection, and the process is realized by changing the corresponding loop configuration file, which is the main content of secondary loop safety measure verification. When there is more than one device to be serviced at the same time, the verification process becomes very complex and it is difficult to verify the device by the experience of the operator alone. All the equipment to be overhauled can be classified into an overhauling domain, equipment affected by overhauling is classified into an affected domain, and the overhauling domain and the configuration of each equipment in the affected domain are correspondingly changed.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an intelligent substation safety measure checking expert system, wherein an overhaul pressing plate of the intelligent station protection device is locked and related protection actions during overhaul, the protection device, the intelligent terminal and the merging unit are all provided with the overhaul pressing plate, the combination of the overhaul pressing plates among different intelligent electronic equipment (IEDs for short) has different action actions, and when in overhaul operation, an overhaul worker needs to fully realize the cooperation between the overhaul pressing plate and a soft pressing plate so as to avoid misoperation of the protection device.
The invention is realized by the following technical scheme:
an intelligent substation safety measure check expert system which is characterized in that: the expert system mainly comprises a comprehensive data module, a knowledge acquisition module, a knowledge base module, an inference engine module, a man-machine interface module and an interpreter module.
The invention further adopts the technical improvement scheme that:
the knowledge base module mainly comprises a basic database module and a method base module;
the basic database module comprises intelligent element information data, protection device information data, merging unit information data, nameplate information data and factory information data;
the method library module comprises an influence domain determining method based on an overhaul domain and a relay protection isolation method of secondary system safety measure.
The invention further adopts the technical improvement scheme that:
the inference engine module firstly digitizes the state quantity of the input information, the required 'overhaul domain' is shown by a coding mode, the state quantity of the current intelligent device can be obtained by an integrated monitoring system, an 'influence domain' is generated by calling a method in a knowledge base, an isolation scheme is further provided, an expert system judges and compares the operation condition of the operation after the operation is performed by an operator, if the operation step is different from the isolation scheme, the expert system generates an alarm signal and further processes the alarm signal, and otherwise, the operation is ended.
The invention further adopts the technical improvement scheme that:
the expert system software development uses an object-oriented programming language development and is applied to a Microsoft Windows operating system platform, a Linux platform and a Unix platform, and the adopted database is Oracle, microsoft SQL Server or Sybase database management software.
Compared with the prior art, the invention has the following obvious advantages:
the invention relates to a secondary system safety measure checking expert system applied to an intelligent transformer substation, which is an intelligent computer system, contains a large amount of knowledge and experience of expert level in a certain field, and can treat the problem in the field by utilizing the knowledge and problem solving method of human expert, namely, the expert system is a computer program system capable of simulating the human expert to solve the problem in the field.
1. The invention sets up the measure of security and checks the knowledge base; the knowledge base is used as the core of the expert system, and the structure and method for storing knowledge and rules determine the performance of the expert system. The knowledge base of the intelligent station on-line checking expert system based on the integrated monitoring system is composed of a relay protection isolation scheme of an overhaul domain and an operation domain, so that the determination of the overhaul domain and an influence domain thereof in a typical wiring mode is realized, and the overhaul domain is further completely isolated from the operation domain. The knowledge base is designed to reasonably represent the state information of the intelligent element, the protection device and the merging unit and the correct operation method under the state.
2. The invention is provided with an inference engine module; the inference engine module and the knowledge base module together form the core of the expert system, and the function of the inference engine module and the knowledge base module is to extract corresponding knowledge from the knowledge base for solving specific problems. The knowledge base of the invention already comprises a determination method and a secondary safety measure isolation method of an overhaul domain and an influence domain, and all stored rules have the same production knowledge representation method, so that the invention can adopt a rule-based inference engine module as shown in figure 3.
Drawings
FIG. 1 is a conventional substation comprehensive automation and intelligent substation;
FIG. 2 shows a secondary circuit structure of an intelligent substation
FIG. 3 is a flow chart of the operation of the inference engine module of the present invention;
FIG. 4 is an expert system architecture of the present invention;
FIG. 5 is a diagram of the expert system knowledge base architecture of the present invention.
Description of the embodiments
As shown in FIG. 4, the expert system of the present invention mainly comprises a comprehensive data module, a knowledge acquisition module, a knowledge base module, an inference engine module, a man-machine interface module and an interpreter module.
As shown in fig. 5, the knowledge base module mainly comprises a basic database module and a method base module; the basic database module comprises intelligent element information data, protection device information data, merging unit information data, nameplate information data and factory information data; the method library module comprises an influence domain determining method based on an overhaul domain and a relay protection isolation method of secondary system safety measure.
As shown in fig. 3, the inference engine module digitizes the state quantity of the input information, and indicates the required "maintenance domain" through the coding mode, while the state quantity of the current intelligent device can be obtained through the integrated monitoring system, and generates the "influence domain" and further gives an isolation scheme by calling the method in the knowledge base, and after the operation is performed by the operator, the expert system determines and compares the operation condition of the operator, if the operation step is different from the isolation scheme, the expert system generates an alarm signal and further processes, otherwise, the operation is ended.
The expert system software development uses an object-oriented programming language development and is applied to a Microsoft Windows operating system platform, a Linux platform and a Unix platform, and the adopted database is Oracle, microsoft SQL Server or Sybase database management software.
Example 1 merge Unit deficiency elimination
The merging unit concentrates current and voltage data required by intelligent substation protection, and faults of the merging unit can directly influence line protection and bus protection corresponding to the interval merging unit. Thus, when servicing the merging unit:
and (3) maintenance domain: corresponding merging units of the interval
Impact domain: all devices for sampling data using the merging unit
Safety measures are as follows:
the first step: logical virtual loop soft pressing plate exiting from influence domain and overhaul domain
(1) The corresponding line protection of ' trip outlet GOOSE sending soft pressing plate ', ' reclose outlet GOOSE sending soft pressing plate ', ' start failure GOOSE sending soft pressing plate ', ' exit opening of tripping gate GOOSE sending soft pressing plate ', ';
(2) And exiting the corresponding line breaker failure protection of 'starting failure GOOSE sending soft pressing plate', 'tripping outlet GOOSE sending soft pressing plate'.
And a second step of: ' overhaul ' hard pressing plate for equipment input into ' overhaul field
(3) And putting into an overhauling state hard pressing plate of the merging unit.
Example 2 Main transformer interval maintenance in single bus and double bus wiring mode
And (3) maintenance domain: the main transformer protection and each side process layer equipment (merging unit and intelligent terminal)
Impact domain: bus protection and main transformer jump equipment (sectionalizing switch, etc)
Safety measures are as follows:
the first step: logical virtual loop soft pressing plate exiting from influence domain and overhaul domain
(1) The X branch circuit corresponding to the female differential protection device is withdrawn from the soft pressing plate;
(2) The soft pressing plate is opened when the X branch corresponding to the female differential protection device fails;
(3) A 'failure start' soft pressing plate which exits the main transformer protection;
(4) And a GOOSE outlet soft pressing plate of the middle-pressure side segment and the low-pressure side segment of the main transformer protection joint jump is withdrawn.
And a second step of: ' overhaul ' hard pressing plate for equipment input into ' overhaul field
(5) Putting the 'overhauling state' hard pressing plates of the merging units at each side;
(6) Putting the 'overhauling state' hard pressing plates of the intelligent terminals on each side;
(7) And (5) putting a 'maintenance state' hard pressing plate for main transformer protection.
Example 3 Main transformer interval maintenance in inner bridge connection mode
The special mode of main transformer maintenance and high-voltage side line operation under the internal bridge connection mode is needed to be paid special attention.
And (3) maintenance domain: the main transformer protection, each side process layer equipment (merging unit, intelligent terminal)
Impact domain: line spacing, sectionalizing switches, etc
Safety measures are as follows:
the first step: logical virtual loop soft press plate and GOOSE trip press plate for exiting from influence domain and maintenance domain
(1) The main transformer protection is exited, and the high-voltage side current SV is received by the soft pressing plate;
(2) The main transformer protection is exited, and the bridge side current SV receives a soft pressing plate;
(3) Exiting the soft pressing plate of the GOOSE outlet at the main transformer protection high-pressure side;
(4) Exiting the soft pressing plate at the GOOSE outlet of the main transformer protection bridge-skipping switch;
(5) And exiting the GOOSE outlet soft pressing plate of the low-voltage section in the main transformer protection joint jump.
And a second step of: ' overhaul ' hard pressing plate for equipment input into ' overhaul field
(6) The 'overhauling state' hard pressing plate of the main transformer medium-voltage side merging unit is put in;
(7) The 'overhauling state' hard pressing plate of the merging unit at the low-voltage side of the main transformer is put in;
(8) The 'overhauling state' hard pressing plate of the intelligent terminal at the medium-voltage side of the main transformer is put in;
(9) The 'overhauling state' hard pressing plate of the intelligent terminal at the low-voltage side of the main transformer is put in;
(10) And (5) putting a 'maintenance state' hard pressing plate for main transformer protection.
The present invention is not limited to the preferred embodiments, but is capable of modification and variation in detail, and other embodiments, such as those described above, of making various modifications and equivalents will fall within the spirit and scope of the present invention.
Claims (3)
1. An intelligent substation safety measure check expert system which is characterized in that: the expert system mainly comprises a comprehensive data module, a knowledge acquisition module, a knowledge base module, an inference engine module, a man-machine interface module and an interpreter module;
the knowledge base module mainly comprises a basic database module and a method base module;
the basic database module comprises intelligent element information data, protection device information data, merging unit information data, nameplate information data and factory information data;
the method library module comprises an influence domain determining method based on an overhaul domain and a relay protection isolation method of secondary system safety measure.
2. An intelligent substation security check expert system according to claim 1, wherein: the inference engine module firstly digitizes the state quantity of the input information, the required 'overhaul domain' is shown by a coding mode, the state quantity of the current intelligent device can be obtained by an integrated monitoring system, an 'influence domain' is generated by calling a method in a knowledge base, an isolation scheme is further provided, an expert system judges and compares the operation condition of the operation after the operation is performed by an operator, if the operation step is different from the isolation scheme, the expert system generates an alarm signal and further processes the alarm signal, and otherwise, the operation is ended.
3. An intelligent substation security check expert system according to claim 1 or 2, characterized in that: the expert system software development uses an object-oriented programming language development and is applied to a Microsoft Windows operating system platform, a Linux platform and a Unix platform, and the adopted database is Oracle, microsoft SQL Server or Sybase database management software.
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| CN202310775669.7A CN117081234A (en) | 2023-06-28 | 2023-06-28 | Intelligent substation safety measure checking expert system |
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|---|---|---|---|---|
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2023
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