The whole process construction system of intelligent hydropower station based on IEC 61850

Abstract

The present invention discloses a full-process construction system of an intelligent hydropower station based on IEC 61850. It includes a technology accumulation process, demand analysis, and the formulation, review and modification of an overall plan; the technology accumulation process includes data collection, on-site investigation, and technical exchanges; the formulation of an overall plan includes the hierarchical division of physical objects in a hydropower station, information object modeling, communication system construction, integrated management and control platform construction, and intelligent business applications; wherein the physical object hierarchical division stage expresses the hierarchical relationship of actual physical equipment objects; the information object modeling stage divides the information object model into servers, logical devices, logical nodes, data objects, and data attributes; the communication system construction includes communication interfaces, communication protocols, communication protocol conversion, and communication networks; the integrated management and control platform construction includes a data center, a basic service platform, and an intelligent application platform. The present invention has the advantages of realizing data sharing and integration of hydropower stations and system interconnection and intercommunication.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent hydropower stations, and more specifically, to an IEC 61850-based intelligent hydropower station full-process construction system. Background Art

[0002] With the continuous development of smart hydropower stations, hydropower stations will face an increasing amount of engineering data. However, the communication standards adopted by various industries involved in hydropower stations are different. This will directly lead to the aggravation of the data island problem and the inability to share and integrate data structures, which seriously hinders the development of intelligent hydropower stations.

[0003] Compared with hydropower stations, smart substations based on the IEC 61850 communication standard have been successfully applied in a large number of applications. Compared with conventional computer control and protection, smart substations based on IEC 61850 can save resources, simplify design, speed up construction progress, improve interoperability between systems and equipment, and improve the consistency of information content itself, with a series of major technical advantages. However, in the field of hydropower station automation, due to the current incomplete technical standards and specifications for intelligent construction of hydropower stations, the lack of consensus on the direction of technical development, and the lack of intelligent electronic devices (IED) products that support this standard and the imperfect detection and evaluation system of intelligent electronic devices, smart hydropower stations based on IEC 61850 have always been difficult to make significant progress and good results.

[0004] As an international standard for power system automation, IEC 61850 has been upgraded from "Substation Network and Communication Protocol" to "Power Enterprise Automation Communication Network and System", and its application scope has been expanded to the entire power automation system including hydropower stations. The corresponding hydropower station monitoring communication standard "IEC61850-7-410: Hydroelectric power plants--Communication for monitoring and control" has also been officially published.

[0005] Therefore, it is necessary to develop a smart hydropower station full-process construction system based on IEC 61850 that can realize hydropower station data sharing and integration and system interconnection. Summary of the invention

[0006] The purpose of the present invention is to provide a whole-process construction system of an intelligent hydropower station based on IEC 61850. The scheme proposes a new construction scheme of an intelligent hydropower station based on the IEC 61850 communication standard. The scheme runs through the whole process of intelligent hydropower station construction based on IEC 61850, including five major process stages: hierarchical division of physical objects of hydropower stations, information object modeling, communication system construction, integrated management and control platform construction, and intelligent business application. It realizes data sharing and integration of hydropower stations, and system interconnection, laying a foundation for intelligent applications of intelligent hydropower stations, and has important guiding significance for the construction of intelligent hydropower stations.

[0007] In order to achieve the above-mentioned purpose, the technical solution of the present invention is: a whole-process construction system of an intelligent hydropower station based on IEC 61850, characterized in that: it includes a technology accumulation process, demand analysis, and formulation of an overall plan, plan review and modification;

[0008] The process of technology accumulation includes data collection, on-site investigation, and technical exchanges;

[0009] The formulation of the overall plan includes five major process stages, namely: hierarchical division of physical objects of hydropower stations, information object modeling, communication system construction, integrated management and control platform construction, and intelligent business application;

[0010] In the physical object level division stage, the physical equipment of the hydropower station is divided into plant level, system level, equipment level and component level to express the hierarchical relationship of the actual physical equipment objects;

[0011] In the information object modeling phase, the information object model is divided into five levels: server, logical device (LD), logical node (LN), data object (DO), and data attribute (DA);

[0012] Communication system construction includes communication interface, communication protocol, communication protocol conversion, communication network, etc.;

[0013] The construction of the integrated management and control platform includes the construction of three modules: data center, basic service platform, and intelligent application platform;

[0014] Intelligent business applications include four modules: economical power generation, intelligent operation, smart operation and maintenance, and intelligent management.

[0015] In the above technical solution, the physical object level division stage is used to realize the hierarchical structure feature description of the equipment object, reflecting the relationship between multiple hydropower station equipment models; the relationship between multiple hydropower station equipment models includes the actual physical equipment composition relationship of the hydropower station, the relationship between the same type of equipment, the relationship between the same level of equipment, the relationship between subordinate equipment, etc.;

[0016] The physical object hierarchy division stage provides the necessary physical equipment object hierarchy relationship for the construction of smart hydropower stations.

[0017] The physical object hierarchical division stage divides the physical equipment objects of the hydropower station into plant level, system level, equipment level and component level, and expresses the hierarchical relationship of the actual physical equipment objects where the information object model is located; the subsequent information object model constructed based on the IEC 61850 standard can describe the data attribute information of the measured point, but cannot describe the hierarchical relationship of the object. The physical object hierarchical division stage of the present invention is a supplement and improvement to the information object model based on IEC 61850.

[0018] In the above technical solution, the information object modeling stage is the key to realize the construction of intelligent hydropower station based on IEC 61850;

[0019] After describing the hierarchical structure of the equipment objects in the physical object level division phase, an object-oriented information system model is established based on the information object modeling phase of IEC 61850, which can simultaneously describe the equipment object hierarchical structure relationship and model measurement point information, thus realizing the complementarity between the object-oriented and information coverage of the smart hydropower station equipment.

[0020] The IEC 61850 standard adopts object-oriented modeling technology. Each IED contains one or more servers, each server contains multiple logical devices, logical devices contain logical nodes, logical nodes contain data objects, and data objects are named instances of common data classes composed of data attributes. The IEC 61850 standard standardizes the data objects and services of logical nodes, so that logical nodes can interoperate at the network layer of hydropower stations.

[0021] In the above technical solution, the communication system construction phase is the core link to realize the construction of intelligent hydropower station based on IEC 61850;

[0022] The unification of communication protocols enables full sharing of data in smart hydropower stations. During the construction of the communication system, the communication data model interface and protocol are unified based on the IEC 61850 standard, and the unified IEC 61850 standard is used to replace the original communication protocols of various manufacturers. For various types of hydropower station equipment that support the IEC 61850 standard, the IED that supports the standard is directly used to replace the original equipment.

[0023] For various types of equipment in hydropower stations that do not support the IEC 61850 standard, corresponding IEC 61850 protocol converters are added to convert the collected information into IEC 61850 standard modeling; at the same time, unlike the information flow of traditional on-site monitoring systems in the past, in which all information is centrally sent to the plant network through PLC, each IED at the unit layer of the smart hydropower station in the present invention is simultaneously connected to the process layer GOOSE / SV network and the plant MMS network, and is uniformly sent to the integrated management and control platform according to the MMS protocol based on IEC 61850.

[0024] In the above technical solution, the construction phase of the integrated management and control platform covers the production area I, area II and information management area of ​​the smart hydropower station, and can effectively manage and control all kinds of production equipment, business data, operation management and other information object models based on the IEC 61850 standard, and realize data fusion, equipment interconnection, system integration and business support based on the IEC 61850 smart hydropower station;

[0025] The integrated management and control platform construction phase includes the construction of three modules: data center, basic service platform, and intelligent application platform;

[0026] The data center integrates the storage and management of distributed models and data of hydropower stations based on the IEC 61850MMS protocol, and implements unified and standard data access services.

[0027] The basic service platform provides backend services such as data computing framework, permission log management, human-machine interface graphic library, task process management, etc. for intelligent application development based on the data center;

[0028] The intelligent application platform is based on algorithm models such as machine learning, expert knowledge base, and artificial intelligence, and provides intelligent applications such as data mining, analysis and early warning, status assessment, and decision assistance.

[0029] In the above technical solution, the intelligent business application stage is based on an integrated management and control platform to realize four module functions including economic power generation, intelligent operation, smart operation and maintenance, and intelligent management;

[0030] The functional modules of intelligent business applications can be added or deleted according to the intelligence level of the construction of the smart hydropower station, so as to realize modular management of the intelligent business application functions of the hydropower station.

[0031] The present invention has the following advantages:

[0032] (1) The present invention implements a full-process construction system of an intelligent hydropower station based on IEC 61850, realizes data sharing and integration of intelligent hydropower stations, and system interconnection and intercommunication, which has important guiding significance for the construction of intelligent hydropower stations;

[0033] (2) The present invention realizes the hierarchical division of the physical objects of the hydropower station, provides the necessary hierarchical relationship of the physical equipment objects for the construction of the intelligent hydropower station, and clarifies the hierarchical structure of the equipment objects;

[0034] (3) The present invention realizes unified modeling for hydropower station information objects, solving the problems of traditional hydropower station data information having no self-description capability, inconsistent information expression methods, and poor equipment interchangeability and interactivity;

[0035] (4) The present invention realizes the construction of IEC 61850 communication system for intelligent hydropower station, thereby realizing the unification of system information model, communication service and transmission process;

[0036] (5) The present invention realizes the construction of a standard, universal, open and configurable integrated management and control platform based on IEC 61850, and realizes the data center, basic services and business support of the IEC 61850 smart hydropower station;

[0037] (6) The present invention realizes the intelligent business application of hydropower stations based on IEC 61850 and realizes modular management of intelligent business application functions of hydropower stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the whole process of the whole process construction system of the intelligent hydropower station based on IEC 61850 of the present invention;

[0039] Figure 2 The structure diagram of the physical equipment object of the intelligent hydropower station based on IEC 61850 of the present invention;

[0040] Figure 3 This is a structural diagram of the information object model of the intelligent hydropower station based on IEC 61850 of the present invention;

[0041] Figure 4 This is a system architecture diagram of the smart hydropower station based on IEC 61850 of the present invention. DETAILED DESCRIPTION

[0042] The following is a detailed description of the implementation of the present invention in conjunction with the accompanying drawings, but they do not constitute a limitation of the present invention and are only given as examples. At the same time, the advantages of the present invention are made clearer and easier to understand through the description.

[0043] IEC61850 is the only global standard in the field of power system automation.

[0044] The present invention proposes a full-process construction scheme for a smart hydropower station based on IEC 61850, and studies the full-process construction system of a smart hydropower station based on IEC 61850 from the process stages of physical object hierarchy division of the power station, information object modeling, communication system construction, integrated management and control platform construction, and intelligent business application.

[0045] Figure 1 The whole process of the whole process construction system of a smart hydropower station based on IEC 61850 proposed by the present invention is shown. The construction scheme design process includes the technical accumulation process such as preliminary data collection, on-site investigation, technical exchange, demand analysis, and the formulation and review of the overall plan (when the formulated overall plan passes the review, the overall plan that passes the review is the final smart hydropower station whole process construction system based on IEC 61850; when the formulated overall plan fails to pass the review, the overall plan is modified and improved according to the review opinions, and the modified and improved overall plan is reviewed again. If it passes the review, the modified and improved overall plan that passes the review is the final smart hydropower station whole process construction system based on IEC 61850); thus, the whole process construction system of a smart hydropower station based on IEC 61850 is finally formed, and its scheme content includes five major construction process stages: physical object hierarchical division, information object modeling, communication system construction, integrated management and control platform construction, and intelligent business application, which is characterized by:

[0046] In the physical object hierarchical division stage, the physical equipment of the smart hydropower station is realized by expressing the hierarchical relationship of the actual physical equipment objects according to the plant level, system level, equipment level, and component level, and the physical hierarchical structure of the information object model based on IEC 61850 is supplemented and improved, such as Figure 2 As shown, the specific implementation method of the physical object hierarchical division stage includes the following steps:

[0047] Step 1.1: Plant-level division;

[0048] Smart hydropower plant buildings can be divided into main buildings, auxiliary buildings, main transformer plants, high-voltage switch stations and other building hubs according to the plant level;

[0049] Step 1.2: System level division;

[0050] The intelligent hydropower station system can be divided into the electrical primary circuit system, electrical secondary circuit system, hydraulic system, mechanical control equipment system and auxiliary equipment system;

[0051] Step 1.3: Equipment layer division;

[0052] The electrical primary circuit system includes generators, lead wires, busbars, voltage distribution equipment, main transformers, high-voltage switch stations and other equipment; the electrical secondary circuit system includes machine side panels, excitation equipment, central control room, control and operation equipment and other equipment; the hydraulic system includes turbines, pressure pipes, water inlet valves, tailwater gates and other equipment; the mechanical control equipment system includes speed control equipment, emergency valve control equipment and other related mechanical control equipment; the auxiliary equipment system includes plant power equipment, lifting equipment, oil, gas and water equipment and other related auxiliary equipment;

[0053] Step 1.4: Component layer division;

[0054] There are many equipment components in a smart hydropower station. The embodiment of the present invention takes the two important hydropower generation equipment, the turbine and the generator, in the hydropower station as examples to divide the equipment components into levels. The turbine can be divided into four major components: water diversion, water guide, working, and water discharge. The water diversion components include the water diversion chamber volute, seat ring, etc.; the water guide components include guide vanes, guide vane bearings, control rings, transmission mechanisms, safety mechanism shear pins, relays, etc.; the working components include runners, etc., and the water discharge components include water discharge cones, tailwater pipes, etc. The generator includes a stator, a rotor, upper and lower frames, thrust bearings, guide bearings, coolers, brakes, and other components.

[0055] In the information object modeling stage, the information object model of the intelligent electronic device (IED) in the hydropower station is implemented. The information object model based on IEC 61850 is as follows: Figure 3 As shown. Each intelligent electronic device includes one or more servers, each server includes one or more logical devices, each logical device includes multiple logical nodes, each logical node includes multiple data objects, and the data object is a named instance of a common data class composed of data attributes. Intelligent electronic devices exchange information through a communication service interface based on IEC 61850 standardization.

[0056] Among them, the main logical node types of smart hydropower stations can be divided into four categories and ten subcategories. The logical nodes of smart hydropower stations can be divided into electrical, mechanical, hydropower station specific, and intelligent perception logical node types, which can be subdivided into performance function modules, interfaces and archives, mechanical and non-electrical main equipment, hydropower station specific, metering and measurement, protection functions, protection related functions, supervision and measurement, sensing, and power system equipment logical node types. For data objects, the turbine node contains data objects such as working head, flow, output and efficiency, speed, and runner diameter; the main valve node contains data objects such as switch position, position deviation, position deviation margin, forward and reverse compensation, and water flow; the governor node contains data objects such as controller error, controller output, remote lockout, and voltage drop.

[0057] During the communication system construction phase, the communication data model interface and protocol were unified based on the IEC 61850 standard, enabling full sharing and access of smart hydropower station data. Figure 4 As shown in the figure, each IED at the unit layer of the smart hydropower station is connected to the GOOSE / SV network based on IEC 61850 at the process layer and the MMS network based on IEC 61850 at the plant layer, and is uniformly sent to the integrated management and control platform according to the MMS protocol based on IEC 61850. The unified IEC 61850 standard is used to replace the various communication protocols of various manufacturers. For various types of hydropower station equipment that support the IEC 61850 standard, the IED that supports the standard is directly used to replace the original equipment; for various types of hydropower station equipment that do not support the IEC 61850 standard, the corresponding IEC 61850 protocol converter is added to each of them to convert the collected information into IEC 61850 standard modeling.

[0058] The integrated management and control platform construction phase achieved data fusion, equipment interconnection, system integration and business support based on IEC 61850 smart hydropower stations, and effectively managed and controlled all types of production equipment, business data, operation management and other information object models based on IEC 61850 standards, solving problems such as isolation of each system, difficult management and control, complex maintenance, poor intelligent decision-making and repeated investment. The integrated management and control platform construction phase includes the construction of three modules: data center, basic service platform and intelligent application platform. Figure 4 shown.

[0059] The data center integrates the storage and management of the distributed models and data of the hydropower station based on the IEC 61850MMS protocol to achieve unified and standard data access services. The construction of the data center includes real-time library storage units, relationship library storage units, file storage units, data and model management, etc. The basic service platform is the development and operation basis of the integrated management and control platform. It provides technical support for the development, operation and management of intelligent applications based on the data center. The construction of the basic service platform includes back-end services such as data calculation framework, permission log management, human-machine interface graphic library, task process management, etc. On the basis of the support provided by the basic service platform, the intelligent application platform provides intelligent applications such as data mining, analysis and early warning, status assessment, and decision-making assistance based on algorithm models such as machine learning, expert knowledge base, and artificial intelligence, providing a modular technical foundation for upper-level intelligent business applications.

[0060] The intelligent business application stage includes intelligent business application modules such as economic power generation, intelligent operation, intelligent operation and maintenance, and intelligent management. Figure 4As shown. The intelligent business application stage is based on the integrated management and control platform, which can be added and deleted according to the intelligent degree of the construction of the intelligent hydropower station, so as to realize the modular management of the intelligent business application functions of the hydropower station. Among them, the economic power generation business module is in the safety zone I, including automatic power generation control, automatic voltage control, economic dispatching control, intelligent equipment operation monitoring and other functions; the intelligent operation business module is in the safety zone II, including forecasting and reporting, plan management, decision support, dispatching consultation, water regulation automation, protection information management, electric energy metering, fault recording and other functions; the smart operation and maintenance business module is in the safety zone III, including dam safety monitoring and analysis and evaluation, status monitoring and analysis and evaluation, generator maintenance plan decision-making, video monitoring and other functions; the intelligent management business module is in the safety zone III, including production information management, automatic fire alarm, industrial television, emergency response, digital virtual power station, office automation and other functions.

[0061] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0062] Other parts not described belong to the prior art.

Claims

1. The whole process construction system of intelligent hydropower station based on IEC 61850 is characterized by: Including technology accumulation process, demand analysis, and overall plan formulation, plan review and modification; The process of technology accumulation includes data collection, on-site investigation, and technical exchanges; The formulation of the overall plan includes five major process stages, namely: hierarchical division of physical objects of hydropower stations, information object modeling, communication system construction, integrated management and control platform construction, and intelligent business application; In the physical object level division stage, the physical equipment of the hydropower station is divided into plant level, system level, equipment level and component level to express the hierarchical relationship of the actual physical equipment objects; In the information object modeling phase, the information object model is divided into five levels: server, logical device, logical node, data object, and data attribute; Communication system construction includes communication interface, communication protocol, communication protocol conversion, and communication network; The construction of the integrated management and control platform includes the construction of three modules: data center, basic service platform, and intelligent application platform; Smart business applications include four modules: economic power generation, smart operation, smart operation and maintenance, and smart management; The information object modeling stage is used to realize the construction of intelligent hydropower stations based on IEC 61850; The IEC 61850 standard adopts an object-oriented modeling method. Each IED contains one or more servers, each server contains multiple logical devices, logical devices contain logical nodes, logical nodes contain data objects, and data objects are named instances of common data classes composed of data attributes. The IEC 61850 standard standardizes the data objects and services of logical nodes, so that logical nodes can interoperate at the network layer of hydropower stations. The communication system construction phase is used to realize the construction of intelligent hydropower stations based on IEC 61850; The unification of communication protocols enables full sharing of data in smart hydropower stations. In the construction phase of the communication system, the communication data model interface and protocol are unified based on the IEC61850 standard, and the unified IEC 61850 standard is used to replace various communication protocols of various manufacturers. For various types of hydropower station equipment that supports the IEC 61850 standard, the original equipment is directly replaced by IEDs that support the standard. For various types of hydropower station equipment that do not support the IEC 61850 standard, corresponding IEC 61850 protocol converters are added to convert them into IEC 61850 standard models; At the same time, each IED at the unit level of the smart hydropower station is connected to the process level GOOSE / SV network and the plant level MMS network at the same time, and is uniformly sent to the integrated management and control platform according to the MMS protocol based on IEC 61850; The intelligent business application stage is based on an integrated management and control platform to realize four module functions including economic power generation, intelligent operation, smart operation and maintenance, and intelligent management; The functional modules of intelligent business applications are increased or deleted according to the intelligent degree of construction of the intelligent hydropower station, so as to realize modular management of the intelligent business application functions of the hydropower station.

2. The whole process construction system of intelligent hydropower station based on IEC 61850 according to claim 1 is characterized in that: The physical object level division stage is used to realize the hierarchical feature description of equipment objectification, reflecting the relationship between various hydropower station equipment models; the relationship between various hydropower station equipment models includes the actual physical equipment composition relationship of the hydropower station, the relationship between equipment of the same type, the relationship between equipment of the same level, and the relationship between subordinate equipment.

3. The whole process construction system of intelligent hydropower station based on IEC 61850 according to claim 1 or 2 is characterized in that: After describing the hierarchical structure of the equipment objects in the physical object level division stage, an object-oriented information system model is established based on the information object modeling stage of IEC 61850. At the same time, the equipment object hierarchy relationship and model measurement point information are described to achieve the complementarity of the objectification and information coverage of the smart hydropower station equipment.

4. The whole process construction system of intelligent hydropower station based on IEC 61850 according to claim 1 is characterized in that: The integrated management and control platform construction phase covers the production area I, II and information management area of ​​the smart hydropower station, and conducts global and effective management and control of various production equipment, business data and operation management information object models based on the IEC61850 standard, realizing data fusion, equipment interconnection, system integration and business support for IEC 61850 smart hydropower stations; The data center integrates the storage and management of distributed models and data of hydropower stations based on the IEC 61850MMS protocol, and implements unified and standard data access services. The basic service platform provides background services such as data computing framework, permission log management, human-machine interface graphic library, and task process management for intelligent application development based on the data center; The intelligent application platform is based on machine learning, expert knowledge base, and artificial intelligence algorithm models, providing intelligent applications for data mining, analysis and early warning, status assessment, and decision support.

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