RU2737862C1 - Digital substation control system - Google Patents

Abstract

FIELD: electrical engineering.

SUBSTANCE: invention relates to the field of electrical equipment, in particular to the digital substations control systems. Technical result is achieved by the fact that the digital substation control system includes the substation equipment technical parameters sensors, which are connected to the data converters of such sensors into the digital form, station bus, providing information exchange between each of said converters and subsystem for generation of commands for controlling electrical substation equipment. Subsystem for generation of commands for controlling electrical substation equipment is represented by multifunctional terminals of digital substation equipped with program modules, which provide execution of control functions depending on equipment units, information from which is transmitted to terminals, wherein correspondence of equipment units to terminals is set at the level of network data transfer protocol.

EFFECT: technical result consists in improvement of architecture of digital substation control system.

15 cl, 2 dwg

Description

Technology area

The present invention relates to automated systems, in particular to a digital substation control system, and can be used in the field of electric power.

State of the art

A known system for monitoring, protecting and controlling electrical substation equipment contains sensors for technical parameters of electrical substation equipment connected by communication lines to a control panel associated with a dispatching console (see RF patent 2389117, publ. 10.05.2010, H02J 3/00).

Known is an automated system for monitoring, protecting and controlling electrical substation equipment, which includes sensors for technical parameters of electrical substation equipment connected to an electrical signal-to-optical converter, an optical data transmission bus, optical signal-to-electrical signal converters, a device for monitoring, protecting, registering and controlling equipment electrical substation (see RF patent 2402139, publ. 20.10.2010, H02J 13/00).

Known automated monitoring system, protection and control of electrical substation equipment, disclosed in the RF patent for invention No. 2 468 407 (publ. 27.11.2012, IPC G05B 19/00, H02J 13/00) - a prototype. The known system includes sensors of technical parameters of equipment connected to an electrical signal to optical converter, optical data transmission bus, optical signal to electrical converters, a device for monitoring, protecting, registering and controlling electrical substation equipment. In this case, the above-mentioned device is made in the form of a server cluster, consisting of several computers connected into a single system. The server cluster is connected to a control device for electrical substation equipment located at the operator's workplace, and is also connected by a separate bus to devices executing control commands located on the electrical substation equipment and to a remote access terminal.

However, the disadvantage of the prototype is the lack of flexibility in the architecture of the digital substation control system. This disadvantage is due to the fact that the use of a server cluster in the known invention leads to excessive centralization of management functions. Additionally, the use of complex and expensive server equipment increases the requirements for the characteristics of the premises required for its placement, which complicates the reconstruction of the automated systems of existing substations. Also, the use of a cluster of servers complicates system maintenance, increases operating costs, and ultimately reduces the reliability of a centralized control system. The use of automated systems of such an architecture at small substations is not economically feasible due to the high cost of installing and operating server equipment at the substation.

Disclosure of the essence of the invention

The technical problem to be solved by the present invention is to provide the ability to control a digital substation.

The technical result achieved with the implementation of the present invention is to increase the flexibility of the architecture of the digital substation control system.

An additional technical result is to improve the operational reliability of the digital substation control system.

The technical result is achieved by the present invention, in accordance with which a digital substation control system, including sensors of technical parameters of substation equipment, which are connected to converters of information from such sensors into digital form, a station bus providing information exchange between each of said converters and a subsystem for generating control commands electrical substation equipment. Unlike the prototype, the subsystem for generating commands for controlling electrical substation equipment is represented by multifunctional digital substation terminals equipped with software modules that provide control functions depending on the pieces of equipment from which information is sent to the terminals, while the correspondence of pieces of equipment to the terminals is set at the network level. data transfer protocol.

In particular, the sensors of the technical parameters of the substation equipment are designed to output information in the form of discrete signals and / or analog signals.

In particular, the sensors of the technical parameters of the substation equipment are made with the ability to measure the parameters of the electric current, the diagnostic parameters of the equipment, the parameters of the microclimate in the premises, and the safety parameters.

In particular, converters of information from sensors of technical parameters are represented by converters of analog signals to digital form and / or converters of discrete signals to digital form.

In particular, converters of information from sensors of technical parameters into digital form are represented by converters with the function of controlling the equipment of an electrical substation.

In particular, the control functions provided by the software modules of the multifunctional terminals of the digital substation include the functions of relay protection, emergency control systems, and automated process control systems of the digital substation.

In particular, multi-functional terminals of a digital substation are located in more than one substation room.

In particular, the multifunctional terminals of the digital substation meet industry requirements for climatic conditions of operation, vibration resistance, electromagnetic compatibility, dust and moisture resistance.

In particular, multifunctional terminals of a digital substation are represented by main or backup terminals.

In particular, the digital substation control system further comprises a communication server connected to the station bus and configured to communicate with at least one automated user workstation and / or a remote dispatch center.

In particular, the station bus is represented by a fault-tolerant Ethernet communication network.

In particular, the station bus supports interfaces and data exchange format over network data transfer protocols.

In particular, the network communication protocol is represented by the GOOSE protocol according to the IEC 61850-8-1 standard.

In particular, the network data transfer protocol is represented by the MMS protocol according to the IEC 61850-8-1 standard.

In particular, the network communication protocol is represented by the Sampled Values protocol according to IEC 61850-9-2.

Brief Description of Drawings

FIG. 1 is a block diagram of a digital substation control system.

FIG. 2 is a block diagram of a medium voltage digital substation control system.

Implementation of the invention

The present invention is illustrated in FIG. 1, which is a block diagram of a digital substation control system. The claimed system includes sensors for technical parameters of substation equipment 101, which are connected to converters of information from sensors into digital form. In this case, the sensors of the technical parameters of the substation equipment can be made with the possibility of outputting information in the form of analog signals - analog sensors 102, and / or discrete signals - discrete sensors 103. Analog sensors 102 of the technical parameters of the electrical substation equipment are connected to analog-to-digital converters (PAS ) 105 or with converters of analog and discrete signals (PADS) 107 or with converters of analog and discrete signals with the function of controlling the equipment of an electrical substation (PADS (y)) 108.

Discrete sensors 103 of technical parameters of equipment 101 of electrical substation (D (d)) can be connected with discrete-to-digital signal converters (PDS) 106 or with PADS 107 or with PADS (y) 108. PAS 105, PDS 106, PADS 107 and PADS (y) 108 are connected to the station bus 109, to which the multifunctional terminals (T1, T2, T3) 110 of the digital substation and the communication server (CS) 111 are also connected. The CS 111 can be connected to one or more automated workstations (AWS) 112 operator of a digital substation. CS 111 is connected by a data transmission network with a remote dispatch center 113.

For medium voltage substations, a system having a simplified structure can be used as illustrated in FIG. 2. In the presented embodiment, the claimed system may not include KS 111. In particular, the terminals can be connected by a data network with a remote dispatch center 113. The operator's workstation 112 can be connected to multifunctional terminals 110. The number of terminals in this case can be reduced to two: the main terminal (Tosn) 201 and the backup terminal (Trezervn) 202.

As sensors of electrical substation equipment, sensors are usually provided that measure the parameters of electric current (current, voltage, frequency, etc.), diagnostic parameters of power equipment (oil level of the transformer, the presence of gases in the oil of the transformer, etc.), other non-electrical parameters (air temperature in the premises of the substation, actuation of fire or security alarms, etc.) and others.

Station bus 109 can be configured as an Ethernet fault-tolerant topology using special redundancy protocols with zero network reconfiguration time. Preferably, the station bus 109 supports the interfaces and data exchange format over the network communication protocols, which are standardized and set out in IEC 61850. In private embodiments, such network protocols can be IEC 61850-8-1 (GOOSE, MMS), IEC 61850 -9-2 (Sampled Values).

Multifunctional terminals 110 of the digital substation are equipped with software modules that provide control functions depending on the pieces of equipment from which information is sent to said terminals. The correspondence of pieces of equipment 101 to terminals 110 is defined at the level of the network data transfer protocol. The software of the terminals 110, configurable depending on the type of data arriving at the terminals 110 from the substation bus 109, allows you to solve the following tasks:

• Line differential protection

• Complex of step line protection

• Transformer differential protection

• Differential busbar protection

• Feeder protection

• Motor protection

• Generator protection

• Ensuring the operation of emergency automation, including to prevent stability disturbance, to eliminate the asynchronous mode, to limit the frequency increase, to limit the voltage increase.

• Interpretation of control commands

• Execution of operational locks

• Registration of emergency events

• Determination of the location of damage

• Monitoring of power quality parameters

• Local automation control

• Electricity metering

• Management of information-measuring and information-computing complexes of electrical substation equipment

• Monitoring and diagnostics of power equipment

• Monitoring and diagnostics of transformer and other oil-filled equipment

• Monitoring and diagnostics of switching equipment, etc.

The declared digital substation control system works as follows. The signals from the sensors of the electrical substation equipment D (a) 102 and D (d) 103 through PAS 105, PDS 106, PADS 107, PADS (y) 108 are transmitted to the station bus 109. Further, the signals are sent to the terminals of the digital substation 110, where registration is performed , processing and analysis of these signals, for example, comparison with specified parameters. As a result of the analysis of these signals, for example, when the parameters deviate from the specified ones, control commands are generated, which are sent to the PADS (y) 108 via the substation bus 109, which execute the control commands generated at the terminals 110. Part of the signals from PAS 105, PDS 106 , PADS 107, PADS (y) 108, as well as the data generated during the analysis of digital signals in the terminals 110 of the digital substation are transmitted via the station bus 109 to the CS 111. The CS 111 collects, stores and converts data for transmission to a remote dispatch center 113 and on the operator's workstation 112. From the remote dispatch center 113 and the operator's AWP 112, control commands can also be received, which are sent to the PADS (y) 108 through the CS 111 and the station bus 109. In the simplified structure of the claimed system, illustrated in FIG. 2, the systems of the CS function are performed by the digital substation terminals.

In contrast to existing systems built on the basis of a large number of different types of devices with limited functionality and heterogeneous hardware, this system uses multifunctional digital substation terminals designed to perform all functions of relay protection, automation, automated process control system of a digital substation. Depending on the substation configuration, the protection, automation and automation functions can be divided between several terminals (by connections or by functions). For medium voltage substations, a set of two digital substation terminals (main and backup) can be used, which will perform the functions of protection, automation and automation of the entire substation, as well as the functions of a communication server.

Unlike a system in which the functions of protection, automation and automation are performed by a server cluster, the proposed system does not require special premises at the substation to accommodate servers. Such premises have special requirements, including microclimate, electromagnetic compatibility, electrical power supply, finishing materials, etc. Equipment of such a room at a substation during its construction will lead to additional costs, and during the reconstruction of an existing substation it may be difficult to implement. In the proposed system, digital substation terminals can be installed in any technological rooms at the substation, because meet industry requirements for climatic conditions of work, vibration resistance, electromagnetic compatibility, dust and moisture protection. This allows you to reduce the cost of building a digital substation, and also makes it possible to reconstruct existing facilities to introduce digital substation technology on them. Also, the architecture of the proposed system assumes the possibility of flexible redundancy and localization of any functions or their combinations on individual terminals, which makes it possible to achieve an optimal balance between the reliability of the system and the costs of its implementation. The possibility of installing digital substation terminals in various rooms of the power facility allows achieving spatial distribution and redundancy of protection and emergency control functions, which is necessary to maintain the correct operation of the system during emergencies (fire at the substation, natural disaster, etc.).

Claims (15)

1. A digital substation control system, including sensors of the technical parameters of the substation equipment, which are connected to the converters of information from such sensors into digital form, a station bus that provides information exchange between each of the said converters and a subsystem for generating commands for controlling the equipment of an electrical substation, characterized in that The said subsystem for generating control commands is represented by multifunctional terminals of a digital substation equipped with software modules that provide control functions depending on the pieces of equipment from which information is sent to the said terminals, while the correspondence of pieces of equipment to the terminals is set at the level of the network data transmission protocol. 2. The system according to claim 1, in which the sensors of the technical parameters of the substation equipment are configured to output information in the form of discrete signals and / or analog signals. 3. The system according to claim 1, in which the sensors of the technical parameters of the substation equipment are made with the ability to measure the parameters of electric current, diagnostic parameters of the equipment, parameters of the microclimate in the premises, and safety parameters. 4. The system according to claim 1, in which the converters of information from the sensors of technical parameters are represented by converters of analog signals to digital form and / or converters of discrete signals to digital form. 5. The system according to claim 1, in which the converters of information from the sensors of technical parameters into digital form are represented by converters with the function of controlling the equipment of the electrical substation. 6. The system according to claim 1, in which the control functions provided by the software modules of the multifunctional terminals of the digital substation include functions of relay protection, emergency automation of the automated process control system of the digital substation. 7. The system of claim 1, wherein the digital substation multifunction terminals are located in more than one substation room. 8. The system according to claim 1, in which the multifunctional terminals of the digital substation meet industry requirements for climatic conditions of operation, vibration resistance, electromagnetic compatibility, dust and moisture resistance. 9. The system of claim 1, wherein the digital substation multifunction terminals are primary or backup terminals. 10. The system according to claim 1, which further comprises a communication server associated with the station bus and configured to communicate with at least one workstation of the user and / or a remote dispatch center. 11. The system of claim 1, wherein the station bus is a fault-tolerant Ethernet communication network. 12. The system of claim 1, wherein the station bus supports interfaces and a data exchange format over network data transfer protocols. 13. The system according to claim 1, in which the network communication protocol is represented by the GOOSE protocol according to the IEC 61850-8-1 standard. 14. The system according to claim 1, in which the network data transmission protocol is represented by the MMS protocol according to the IEC 61850-8-1 standard. 15. The system of claim 1, wherein the network communication protocol is represented by the Sampled Values protocol according to IEC 61850-9-2.

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