CN102122844A - Intelligent substation based on sensor, communication network and expert system - Google Patents

Abstract

The invention discloses an intelligent substation based on a sensor, a communication network and an expert system, including a substation automation system, a primary equipment status monitoring system and an intelligent auxiliary control system. Real-time data, using the IEC61850 standard to realize the information modeling of the sensor data, using the communication network to build the physical channel for information transmission, and realizing the advanced application of the substation automation system, the primary equipment status monitoring and the intelligent monitoring and linkage of the auxiliary system through the background expert system, so that To realize the intelligent operation and inspection function of the substation, the sensors include all-fiber electronic current transformers, capacitive voltage-dividing electronic voltage transformers, primary equipment status monitoring sensors, auxiliary system IoT sensors, and the substation automation system Advanced applications include: sequential control, equipment status visualization, intelligent alarms, distributed state estimation, replacement functions, etc. The invention can realize the intelligent operation and inspection function of the substation.

Description

Intelligent substation based on sensor communication network and expert system

technical field

The invention relates to a new type of substation, which realizes the intelligent operation and inspection function of the substation through sensors, communication networks and expert systems, and belongs to the technical field of power systems.

Background technique

After decades of development, my country's substations have formed a relatively mature model, which has played an important role in ensuring the safe and economical operation of the power grid. But there are still many problems, such as:

Conventional transformers have problems such as magnetic saturation, ferromagnetic resonance, explosion of insulating oil, leakage of sulfur hexafluoride, short circuit/open circuit, etc.;

There is a lack of comprehensive monitoring means for the operation parameters of the primary equipment (such as: main transformer, GIS, etc.) in the station, and regular power outage maintenance is required for the equipment, which reduces the efficiency of equipment use;

Lack of real-time monitoring of operating parameters such as operating temperature, ambient temperature and humidity, and water level of all station equipment, and environmental parameters, relying on manual periodic inspections to complete, with a huge workload; starting and stopping of air conditioners, fans, water pumps and other equipment requires manual on-site intervention, which cannot be done according to Intelligent start and stop due to environmental changes, consumes a lot of energy, and cannot meet the requirements of unattended operation;

Production auxiliary systems such as image surveillance, security guards, heating and ventilation, fire alarm, water supply and drainage are isolated from each other, and advanced applications that cannot fully realize intelligent alarm linkage and convenient operation;

It happens from time to time that operating personnel enter the interval by mistake, and there is no effective alarm prompt, which poses a great threat to human safety. The inspection process of personnel failed to achieve effective monitoring, and the inspection quality was difficult to control, increasing the difficulty of management;

The digitalization and informatization of information interaction are not high, and the background data lacks the integrated advanced application of expert system, which cannot provide more auxiliary online decision support for operation.

Contents of the invention

The technical problem to be solved by the previous invention is to provide an intelligent substation, which can realize the intelligent operation and inspection function of the substation.

In order to solve the above technical problems, the present invention provides an intelligent substation based on a sensor communication network and an expert system, including a substation automation system, a primary equipment status monitoring system and an intelligent auxiliary control system, characterized in that: the substation automation system, primary equipment The status monitoring system and the intelligent auxiliary control system obtain real-time data of equipment operation through various sensors, and various sensors communicate with the background expert system through the communication network structure, and realize the advanced application of the substation automation system, primary equipment status monitoring and monitoring through the background expert system. The intelligent monitoring and linkage of the auxiliary system realizes the intelligent operation and inspection function of the substation. The system IoT sensor, the advanced application of the substation automation system includes: sequence control, equipment status visualization, intelligent alarm, distributed state estimation, replacement function, etc.

The aforementioned intelligent substation based on the sensor network and expert system is characterized in that: the substation automation system adopts a hierarchical distributed structure, and the equipment includes station control layer, interval layer, and process layer equipment, and the communication network is used to realize interconnection among the equipment. :

Sensors include: all-fiber electronic current transformer, capacitive voltage divider electronic voltage transformer;

The communication network includes: station control layer network (to realize the interconnection of station control layer and bay layer equipment), and process layer network (to realize the interconnection of bay layer and process layer equipment);

The expert system (that is, the advanced application of the substation automation system) includes the following functional modules:

Sequence control module: The remote monitoring center or the backstage of the station will issue a batch of instructions, judge whether each step is in place according to the change of equipment status information, and automatically execute the next instruction after confirming that it is in place, until all instructions are executed;

Equipment status visualization module: perform real-time display and analysis on the operation status of primary equipment in the station, and send relevant information to the main station system through the network as needed;

Intelligent alarm module: establish a logic and reasoning model for substation fault information, classify fault alarm information and filter signals, conduct online real-time analysis and reasoning of substation operation status, automatically report substation abnormalities and provide guidance for fault handling;

Distributed state estimation module: realize the distributed state estimation function in the substation, which can realize data identification and processing, and can provide reliable data to the dispatching center, reduce the computing burden of the main station system and improve reliability;

Replacement function module: The system provides a replacement setting interface. The replacement value of the device is set by the monitoring system. The replacement value display supports multiple forms of expression to distinguish it from the normal displayed value and the manually set value. When performing unified debugging in the station, through the replacement function, Realize the comprehensive test of simulating the actual situation of the site, including the test of anti-misoperation locking function, remote control function and sequence control function of substation safe operation.

The aforementioned intelligent substation based on the sensor network and expert system is characterized in that: the primary equipment status monitoring system adopts a hierarchical distributed structure, and the equipment includes sensors, status monitoring IEDs, and background hosts, and the communication network is used to realize interconnection between the equipment ,in:

Sensors (220kV GIS indoor station) include: dissolved gas/micro water/oil temperature/pressure sensor in main transformer oil, GIS partial discharge/sulfur hexafluoride gas/circuit breaker operating characteristic sensor, surge arrester leakage current/discharge times sensor.

The communication network includes: RS485 bus or CAN bus (to realize the interconnection between sensors and condition monitoring IEDs); 100M and above star Ethernet (to realize the interconnection between condition monitoring IEDs or between condition monitoring IEDs and background systems);

The expert system includes: a primary equipment status monitoring background analysis system, which realizes the summary and diagnosis analysis of the primary equipment status monitoring data of the whole station.

The aforementioned intelligent substation based on sensor network and expert system is characterized in that: the intelligent auxiliary control system utilizes the Internet of Things technology and adopts a hierarchical distributed structure. The entire intelligent auxiliary system is divided into several subsystems, including: equipment operating temperature online Monitoring subsystem, SF6 leakage monitoring subsystem, heating and ventilation subsystem, anti-intrusion partition subsystem, intelligent inspection and certification subsystem, and fire alarm subsystem. Each subsystem equipment includes various sensors and on-site control terminals. All subsystems share the background host, and the communication network is used to realize the interconnection among the equipment, among which:

Sensors include: temperature and humidity sensing, SF6 sensing, water immersion, smoke sensing, vibration and other sensors, as well as cameras, infrared imaging, sound and light alarms and other facilities;

The communication network includes: RS485 bus or CAN bus, wireless sensor network (to realize the interconnection between sensors and on-site control terminals); 100M and above star Ethernet (to realize the interconnection between on-site control terminals or between on-site control terminals and background systems);

The expert system includes: an intelligent auxiliary control expert system, which realizes the information integration, visualization and linkage functions of each subsystem.

The beneficial effect that the present invention reaches:

The new intelligent substation of the present invention obtains real-time data of equipment operation by adding a large number of sensors, uses the communication network to construct a physical channel for information transmission, and realizes advanced functions of the substation automation system, primary equipment status monitoring, and intelligence of the auxiliary system through the background and expert system Intelligent monitoring and linkage, so as to realize the intelligent operation and inspection function of the substation. The specific manifestation is as follows:

Sensors: Electronic voltage transformers can effectively solve the inherent disadvantages of conventional transformers such as magnetic saturation, ferromagnetic resonance, insulating oil explosion, sulfur hexafluoride leakage, short circuit/open circuit, etc.; primary equipment status monitoring sensors can realize primary equipment operating parameters online monitoring; the IoT sensor of the intelligent auxiliary control system can realize real-time monitoring of temperature and humidity, SF6 sensing, water immersion, smoke, and vibration environmental parameters;

Communication network: Using optical fiber Ethernet, bus, and wireless sensor network instead of cable wiring can greatly simplify the complexity of secondary wiring, save the total amount and cost of connection media, improve the anti-interference performance of signal transmission, and the optical fiber can realize self-test , to facilitate troubleshooting. All secondary signals adopt IEC61850 to achieve standard modeling, which can effectively improve the self-description ability of signals and the interoperability between secondary devices;

Expert system: The advanced application of the substation automation system can greatly improve the operating efficiency, avoid human misjudgment, display the operating status of the equipment in real time, and provide decision-making opinions for the operator in combination with real-time analysis and reasoning; The status inspection of the equipment can detect the signs of equipment failure in time, replace the regular inspection, extend the maintenance cycle of the equipment, reduce the number of power outages, and improve the efficiency of the equipment; the intelligent auxiliary control expert system can realize image monitoring, security guards, fire alarms, and main transformer fire protection Integrated linkage and intelligent operation management of heating, ventilation and other functions, with the functions of "intelligent monitoring, intelligent judgment, intelligent management, and intelligent verification".

Description of drawings

Fig. 1 is the overall structure schematic diagram of substation of the present invention;

Figure 2 is a schematic structural diagram of the 220kV line interval substation automation system in implementation;

Figure 3 is a schematic structural diagram of the primary equipment status monitoring system in implementation;

Figure 4 is a schematic diagram of the configuration of primary equipment status monitoring sensors in the implementation;

Fig. 5 is a structural schematic diagram of the intelligent auxiliary control system in implementation;

Figure 6 is a schematic diagram of the network structure of the station control layer of the substation automation system in implementation;

Figure 7 is a schematic diagram of the process layer network structure of the substation automation system in implementation;

Figure 8 is a schematic diagram of the equipment connection of the primary equipment status monitoring system in the implementation.

Detailed ways

The structure diagram of the intelligent substation involved in the present invention is shown in Figure 1:

The overall structure

The substation side is mainly composed of automation system, primary equipment status monitoring system and intelligent auxiliary control system. The background uses advanced application software and expert system to realize advanced functions of automation system, primary equipment status monitoring, auxiliary system intelligent linkage and other advanced functions.

The real-time data of equipment operation is obtained by adding various sensors, including all-fiber electronic current transformers, capacitive voltage-dividing electronic voltage transformers, primary equipment status monitoring sensors, and auxiliary system IoT sensors.

The primary equipment in the substation is interconnected with the secondary equipment and the secondary equipment through the communication network (including: 100M and above star Ethernet, bus, wireless sensor network, etc.), and the Ethernet communication protocol adopts the IEC61850 standard.

The substation background host has an expert system function module, which can realize the advanced application of the substation automation system, primary equipment status monitoring and intelligent monitoring and linkage of auxiliary systems.

Substation Automation System

It is composed of station control layer, bay layer, and process layer equipment, and is connected by a layered, distributed, and open network system (including station control layer network and process layer network). The overall structure is a "three-layer and two-network" structure. Compared with conventional substations, there are big differences in sensors, secondary wiring, background host and software, as shown in Figure 2.

Sensors: use all-fiber electronic current transformers with advanced measurement principles (SegNike effect) to replace conventional electromagnetic current sensors, use \capacitive voltage divider electronic voltage transformers to replace conventional electromagnetic voltage transformers, and combine unit currents The voltage output adopts digital telegram modeled by IEC61850-9-2 standard.

Secondary wiring: use optical fiber Ethernet to realize the interconnection between primary equipment and secondary equipment, and between secondary equipment. The communication protocol adopts the IEC61850 standard, replaces control cables with optical fibers, and replaces analog signals with digital signals, greatly improving signal transmission anti-interference On the premise of performance, the secondary wiring is greatly simplified. Background host and software: host and operator station to realize the monitoring, control, alarm and information interaction functions of the whole station equipment, and automatically complete data acquisition and monitoring control (SCADA), operation lock, synchronized phasor acquisition, protection information management and other related functions . According to the needs of operation, various automation information in the application station are integrated, and the background software can realize advanced applications such as sequential control, primary equipment status visualization, intelligent alarm, distributed state estimation, and replacement functions, so as to realize the intelligent operation of substations and improve the unmanned operation of substations. On-duty reliability and efficiency, and provide better auxiliary decision-making support for remote operators.

Primary Equipment Condition Monitoring System

A layered distributed structure is adopted, consisting of sensors, status monitoring IEDs, and background systems, as shown in Figure 3:

Sensors: Primary equipment status monitoring sensors should be selected and installed according to the operating requirements and the importance of the equipment. The main sensors installed in the 220kV GIS indoor station include: dissolved gas/micro water/oil temperature/air pressure sensors in the main transformer oil, GIS partial discharge /Sulfur hexafluoride gas/circuit breaker operating characteristic sensor, surge arrester leakage current/discharge times sensor, as shown in Figure 4:

Communication network: RS485 bus or CAN bus is used to transmit analog data between sensors and state monitoring IEDs; DL/T 860 standard communication is adopted between state monitoring IEDs or between state monitoring IEDs and background systems, and the communication network adopts 100M and above high-speed star Ethernet.

Background system: the whole station shares a unified background system, and the background analysis software, interface type and transmission protocol are unified for various equipment status monitoring, so as to realize the transmission, summary, and diagnosis and analysis of the equipment status monitoring data of the whole station.

Intelligent auxiliary control system

Using the Internet of Things technology, through the perception of the outside world, build a sensor network measurement and control network, as shown in Figure 5:

Equipment operating temperature online monitoring subsystem: mainly composed of management center (control host), data transmission base station, wireless temperature sensor and infrared thermal imager.

SF6 leakage monitoring subsystem: composed of SF6 detection nodes, controllers, and collaborative perception monitoring platform.

Water supply and drainage online monitoring subsystem: the detection node adopts wireless water immersion sensors and wired water level sensors, and monitors the same wireless platform as the equipment temperature sensor network, without additional deployment of base stations.

Heating and ventilation subsystem: The detection node adopts wireless temperature and humidity sensors, and the same wireless platform as the equipment temperature sensor network monitors, without additional deployment of base stations.

Anti-mis-entry partition subsystem: The image sensor of the image monitoring system is used to realize the false-entry interval alarm through intelligent image recognition. Working principle: Manually locate the maintenance interval according to the work ticket, automatically pop up the video image of the interval, artificially assist to generate a virtual logical safety fence on the above image screen, automatically compare the position difference between the physical fence and the logical fence, and automatically alarm and identify when it exceeds the standard Personnel activities outside the fence will automatically generate an alarm signal and transmit it to the fence alarm indicator light through the wireless network, prompting the operator to be in the wrong position.

Intelligent inspection and certification subsystem: The image sensor of the image monitoring system is used to realize the inspection quality certification through intelligent image recognition software. Working principle: preset inspection routes and inspection time nodes, preset key equipment image identification films (key inspection points) and image identification clothing (inspection overalls), intelligent image recognition inspection overalls, automatic identification of inspection personnel ( Up to 16 people), automatically record the time of entering and leaving the field of view, automatically generate image identification and text reports, automatically determine the distance between inspection personnel and key inspection points, and automatically generate image identification and text reports for key inspection points. The inspection path, time, and key inspection point inspection time relationship can automatically judge the inspection quality, and generate video stream files and text reports for low-quality inspection events and automatically push them to the top layer of the management personnel's desktop.

Image monitoring and security guard subsystem: It consists of high-definition cameras, vibration sensors, electronic fences and other components. It can detect intrusion and illegal intrusion on the ground and fence, classify people, animals, and vehicles for intrusion targets, intelligent video recognition to prevent overturning gates and fences, arm and disarm on demand, on-site sound and light alarm function, and intelligent video The integration and linkage functions of identification and other subsystems, including intelligent inspection and certification subsystem, SF6 leakage detection subsystem, fire protection subsystem, water supply and drainage subsystem, etc.

Fire alarm subsystem: It consists of a network of smoke detectors, which can provide fire alarm signals, automatically link intelligent image sensors, and lock the exhaust system according to the pre-set interlock logic. This new type of substation can realize the visualization and intelligent control of the equipment status of the whole station from the main system to the auxiliary system through the sensor network and the background expert system, and realize the intelligent operation and inspection of the substation.

The specific effects are as follows:

(1) Electronic transformer

Using advanced measurement principles, it has the advantages of safety, reliability, cost-efficiency, cleanness and environmental protection, transparency and openness, and can effectively solve the inherent disadvantages of conventional transformers such as magnetic saturation, ferromagnetic resonance, insulating oil explosion, sulfur hexafluoride leakage, short circuit/open circuit, etc. ;

Safe and reliable:

Improved insulation performance;

No CT secondary open circuit, PT secondary short circuit;

Use insulating grease instead of oil and SF6, which is environmentally friendly and safe;

No magnetic saturation, wide frequency response range, good transient characteristics, not affected by environmental factors;

The digital signal is transmitted through the optical fiber, which enhances the anti-EMI performance and greatly improves the data reliability.

Cost-effective:

The volume and weight are much smaller than conventional transformers, and it is easy to integrate with other primary equipment, saving investment;

The use of optical cables greatly simplifies cable trenches and cable layers, reduces the amount of cables used, and saves land occupation;

Solid insulation, no need for pressure and leak detection, maintenance-free during operation.

Clean and environmentally friendly:

Insulating grease has no leakage and no pollution;

Optical cables instead of cables save a lot of copper

Transparent and open:

With self-test function; plug and play; debugging tool human-computer interaction.

(2) Communication network

Using optical fiber Ethernet instead of cable wiring can greatly simplify the complexity of secondary wiring, save the total amount and cost of connection media, improve the anti-interference performance of signal transmission, and the optical fiber can realize self-test, which is convenient for troubleshooting. All secondary signals adopt IEC61850 to achieve standard modeling, which can effectively improve the self-describing ability of signals and the interoperability between secondary devices.

(3) Advanced functions of automation system

Sequential control can realize one-button automatic operation of equipment, which greatly shortens the time of manual single-step operation, effectively avoids the possibility of manual operation misjudgment, and improves operating efficiency.

The visualization of equipment status can realize real-time display and analysis of the operation status of primary equipment in the station, and provide better auxiliary decision support for operators.

The classification and filtering of information by intelligent alarms can effectively reduce the workload of operating personnel and ensure that important events are dealt with in a timely and priority manner.

Distributed state estimation can realize data identification and processing in the substation, reduce the computing burden of the main station system and improve reliability.

The virtual manual setting of the replacement function can bring great convenience to the test of the anti-misoperation locking function, telecontrol function and sequence control function during new construction, reconstruction and expansion.

(4) Primary equipment status monitoring system

Through online monitoring of primary equipment operating parameters, it is possible to detect equipment failure symptoms in time, replace regular inspections with condition-based maintenance, extend equipment maintenance cycles, reduce power outages, and improve equipment efficiency.

(5) Intelligent assistance system

Based on the sensor network measurement and control platform, an intelligent monitoring and auxiliary control system is established to realize the integration of functions such as image monitoring, security guards, fire alarms, main transformer fire protection, heating and ventilation, and fully realize the intelligent operation and management of substations. Judgment, intelligent management, intelligent verification" function.

Equipment operating temperature online monitoring subsystem: It can realize real-time measurement and transmission of the operating temperature of the wall bushing, capacitor body and other equipment, avoiding the huge workload caused by the regular manual temperature measurement of the conventional station operators.

SF6 leakage monitoring subsystem: It can realize the functions of accurate detection of SF6 gas leakage, location of leakage point, intelligent image linkage, starting fan ventilation and so on.

Water supply and drainage online monitoring subsystem: realize real-time detection of water accumulation, remote control of water pump operation, automatic discharge of water accumulation, high water level surpasses direct electrical automatic drainage, and provides additional high water level protection.

Heating and ventilation subsystem: Realize remote query of the working status of temperature and humidity detection nodes, remote control of air conditioning operation, and automatically control the operation mode of the ventilation system and air conditioning system according to the indoor and outdoor temperature and humidity conditions to meet the temperature and humidity control requirements and reduce the heating and ventilation belt. to the energy consumption.

Anti-mis-entry partition subsystem: realize automatic identification of personnel activities outside the fence, and automatically generate an alarm signal and transmit it to the fence alarm indicator light through the wireless network, prompting the operator to be in the wrong position, improving the safety of the operator's work and life.

Intelligent inspection and certification subsystem: realize automatic identification of inspection quality according to inspection path, time and key inspection point inspection time relationship, provide quantifiable management methods for managers, and reduce management difficulty.

Image monitoring and security guard subsystem: realize the panoramic monitoring of all station equipment and buildings, and prevent illegal intrusion.

Fire alarm subsystem: Automatically detect fire accidents in substations, realize accident alarm push screen, and linkage system ventilation facilities.

The specific implementation plan of the 220kV Xijing substation pilot project is taken as an example to illustrate:

Xijing substation is composed of automation system, primary equipment status monitoring system and intelligent auxiliary control system. The whole station adopts a large number of new technologies, new equipment and new materials, which can automatically complete one-button sequence control, primary equipment online monitoring, and auxiliary system intelligent Advanced functions such as linkage and advanced application of substation automation system fully realize intelligence from the main system to the auxiliary system. Become an advanced, reliable, integrated, low-carbon, and environmentally friendly new urban indoor station design model.

(1) Electronic transformer

Electronic current transformers: 220kV, 110kV, and three sides of the main transformer adopt all-fiber current transformers, and all electronic current transformers adopt dual A/D sampling, of which 220kV, three sides of the main transformer adopt "4 sensitive rings + 4A /D" mode, 110kV adopts "2 sensitive rings + 2A/D" mode. Considering the convenience of maintenance and operation, reducing the mutual adverse influence between the transformer and GIS, and improving reliability, all GIS full-fiber current transformers are installed outside the gas chamber, of which the 220kV GIS is a three-phase split structure and adopts gas Outdoor independent box installation, 110kV GIS is a three-phase common structure, and it is installed with a flange. The installation method of the transformer in the GIS is finally determined by the association and the relevant manufacturers, and the integrated design and integrated installation are adopted.

The all-fiber-optic current transformer for the incoming line of the 10kV main transformer adopts the installation method in the switch cabinet:

Electronic voltage transformer: 220kV and 110kV voltage transformers in the whole station adopt electronic voltage transformer. All electronic voltage transformers adopt dual A/D sampling. The electronic voltage transformer is installed in an independent tank, and the installation method of the transformer in the GIS is finally determined by the association with the relevant manufacturers, and adopts an integrated design and integrated installation.

(2) Secondary wiring and communication network

The whole station adopts the IEC61850 standard to realize the digitalization and standardization of secondary device information interaction, and uses optical fiber to realize the interconnection of secondary devices, which greatly simplifies the secondary wiring, improves the reliability of information transmission and device interoperability, and saves a lot of control cables (compared with conventional Station reduces more than 60% of control cables).

Station control layer network

The station control layer network adopts a dual-star topology, and the redundant network operates in a dual-network duplex mode to realize seamless network switching. Each small room is equipped with an independent station control layer switch, and the secondary equipment room is equipped with a station control layer central switch, as shown in Figure 6.

process layer network

The 110kV process layer network is configured according to the dual network, and the sampling value, GOOSE, IEEE 1588 are combined into one, and the common network is transmitted to realize the digitization, networking and sharing of data transmission. The 220kV process layer network adopts two sets of physically independent single networks, the sampling value adopts the direct sampling method, and the trip adopts the direct jump + network jump method to ensure the reliability of the system. 10kV does not set an independent process layer network, as shown in Figure 7.

(3) Automation system background host and advanced function software

The background host of the automation system is configured with two sets, and the advanced function software realizes sequence control, equipment status visualization, intelligent alarm, distributed state estimation and replacement functions.

(4) primary equipment status monitoring

Realize the status monitoring of the main transformer, GIS, and lightning arrester in the station, unify the status monitoring background system of the whole station, and realize information interaction with the automation background. The system architecture is shown in Figure 8:

Monitoring range and parameters

Sensor, IED, panel configuration

Background configuration: 1 background host for status monitoring in the whole station, 1 group cabinet, and 1 display terminal on the workbench.

(5) Intelligent auxiliary control system

Use the "Internet of Things" technology to establish a sensor measurement and control network to realize the integrated application and linkage control of auxiliary systems such as image monitoring, security guards, fire alarms, main transformer fire protection, heating and ventilation, water supply and drainage, SF6 leakage monitoring, and operating temperature monitoring. About 330 sensors, such as temperature and humidity sensing, SF6 sensing, water immersion, smoke sensing, vibration, etc. are arranged in the whole station, and cooperate with camera, infrared imaging, sound and light alarm and other facilities to realize the perception of operating environment and operating equipment. Here Based on the establishment of an intelligent monitoring and auxiliary control system, the DL/T 860 communication protocol is used to realize the information exchange and coordination linkage of each auxiliary production system.

The above has disclosed the present invention with preferred embodiments, but it is not intended to limit the present invention, and all technical solutions obtained by adopting equivalent replacement or equivalent transformation methods fall within the protection scope of the present invention.

Claims (5)

1. intelligent substation based on sensor communication network and expert system, comprise electric substation automation system, primary equipment condition monitoring system and intelligent supplementary controlled system, it is characterized in that: described electric substation automation system, primary equipment condition monitoring system and intelligent supplementary controlled system obtain the real time data of equipment operation respectively by various kinds of sensors, various kinds of sensors communicates by communication network structure and backstage expert system, by the senior application of backstage Implementation of Expert System electric substation automation system, the Intellectualized monitoring of primary equipment status monitoring and auxiliary system and interlock, thus realize the intellectuality operation and the inspection function of transformer station.

2. the intelligent substation based on sensing network and expert system according to claim 1, it is characterized in that: electric substation automation system adopts layered distribution type structure, equipment comprises station level, wall, process layer equipment, and it is interconnected to adopt communication network to realize between the equipment, wherein:

Transducer comprises: all-fiber electronic current transformer, capacitance partial pressure type electronic type voltage transformer;

Communication network comprises: realize the station level network that station level, bay device are interconnected and realize the process layer network of wall, process layer devices interconnect;

Expert system comprises following functional module:

Sequential control module: send instruction by the gross by backstage in remote monitoring center or the station, judge that according to the status information of equipment situation of change whether per step operation puts in place, automatically performs next instruction after confirming to put in place, until executing all instructions;

Equipment state visualization model: primary equipment running status in standing is carried out real-time display analysis, as required relevant information is delivered to main station system by network simultaneously;

Intelligent alarm module: logic and the inference pattern of setting up transformer station's fault message, fault warning information is classified and filtering signals, running status to transformer station is carried out online in real time analysis and reasoning, reports that automatically transformer station is unusual and proposes the troubleshooting instruction;

Distributed state estimation module: in transformer station, realize distributed state estimation function, realize data identification and processing, provide reliable data, alleviate the computational burden of main station system and improve reliability to the control centre;

Replace functional module: the actual conditions that realize simulated field are carried out integration test, comprise the test of anti mis-closedown function, remote moving function and the sequential control function of substation safety operation.

3. the intelligent substation based on sensing network and expert system according to claim 1, it is characterized in that: described primary equipment condition monitoring system adopts layered distribution type structure, equipment comprises transducer, status monitoring IED, background host computer, it is interconnected to adopt communication network to realize between the equipment, wherein:

Transducer comprises: main transformer oil dissolved gas/little water/oily temperature/baroceptor, GIS partial discharge/sulfur hexafluoride gas/circuit breaker operating characteristic transducer, leakage current of an arrester/discharge time transducer;

Communication network comprises: realize transducer and interconnected RS485 bus or the CAN bus of status monitoring IED; Realize between the status monitoring IED or status monitoring IED and 100,000,000 interconnected and above star-like Ethernet of background system;

Expert system comprises: primary equipment status monitoring backstage analytical system, realize gathering and diagnostic analysis of full station primary equipment status monitoring data.

4. the intelligent substation based on sensing network and expert system according to claim 1, it is characterized in that: described intelligent supplementary controlled system utilizes technology of Internet of things, adopt layered distribution type structure, whole intelligent assistance system is divided into several subsystems, comprising: equipment operation on-line temperature monitoring subsystem, SF6 leakage monitoring subsystem, heating and ventilation subsystem, anti-introns system, intelligent patrol detection authentication subsystem, the fire-fighting fire alarm subsystem of being strayed into.

5. the intelligent substation based on sensing network and expert system according to claim 4, it is characterized in that: each subsystem equipment comprises each transducer, field control terminal, the shared background host computer of all subsystems, it is interconnected to adopt communication network to realize between the equipment, wherein:

Transducer comprises: facility such as transducer such as warm and humid sense, SF6 sensing, water logging, cigarette sense, vibration and camera, infrared imaging, sound and light alarm;

Communication network comprises: realize transducer and interconnected RS485 bus, CAN bus or the wireless sense network of field control terminal; Realize between the field control terminal or field control terminal and 100,000,000 interconnected and above star-like Ethernet of background system;

Expert system comprises: intelligent assist control expert system, realize the information integration of each subsystem visual with the interlock function.

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