CN104184207A - Integrated control method of digitalized traction substation of electrified railway - Google Patents

Abstract

The invention discloses an integrated control method of a digitalized traction substation of an electrified railway. According to the technical scheme of the invention, on the basis of thorough understanding of the IEC61850 framework, an integrated automatic system comprehensively responding to the IEC61850 framework is realized; processing equipment corresponding to each primary equipment interval carries out digital processing on a signal received by the primary equipment at the primary equipment interval corresponding to the processing equipment itself; and the processing equipment corresponding to all primary equipment intervals report respective information after digital processing to same integrated control equipment respectively, so that the integrated control equipment completes the protection, measurement and control functions of all primary equipment intervals. Therefore, on the basis of the IEC61850 standard, a problem of integrated management of the digitalized traction substation of the electrified railway can be solved; various functions of protection, measurement, control, signal transmitting, fault recording, harmonic analysis, and fault location and the like of the traction substation can be realized; and comprehensive and automatic management of the traction substation of the high-speed electrified railway can be realized.

Description

An integrated control method for digital traction substation of electrified railway

technical field

The invention relates to the field of communication technology, in particular to an integrated control method for digital traction substations of electrified railways. the

Background technique

The high-speed railway traction substation automation system plays a very important role in the normal operation of the high-speed railway, and is an integral part of the safe operation of the high-speed railway. the

At present, there are many problems in the automation system of traction substations in my country, such as low degree of information sharing, poor reliability of information transmission, and lack of standardization of information exchange, which lead to low system reliability and high maintenance costs after completion, mainly reflected in the following aspects:

(1) Communication and sharing of substation information

At present, the analog information of the substation is connected by cables, and the information exchange from the bay layer to the substation layer is mainly completed by field bus or Ethernet. configuration data, so the communication data is less, the real-time performance is not high, and the reliability requirements are not very high. The data from the same primary equipment interval uploaded to the substation layer through different IEDs may be inconsistent or contradictory, and this contradiction is often ignored rather than resolved. The contradictory switching status of a circuit breaker reflected by different IEDs is also ignored or manually processed of. The information transmission between different IEDs in the horizontal direction and between primary equipment and different IEDs is transmitted in the form of cables. There is no sharing of information, and there is no interaction of information between primary equipment. Complicated cable connections also reduce system reliability, and there is no way to expand functions without adding devices, which lacks flexibility. For example, cable connection may bring about the risk of cable terminal wiring loosening, heating, open circuit and short circuit, as well as the possibility of electromagnetic interference, transmission overvoltage and two-point grounding of the secondary circuit. the

(2) Standardization of information exchange

At present, the traction substation automation information that is widely used in my country has not been shared, and several large foreign manufacturers have achieved certain information sharing horizontally through communication, but lack a unified information exchange and sharing standard for the whole station or dispatching system. There are many manufacturers and varieties of automation equipment, and protocol forwarding devices are required between equipment from different manufacturers, and the degree of marketization is low. the

(3) Expansion of automatic functions of cross-interval automation equipment and traction substation

Different automation products of the traction substation automation system currently in operation cannot share information on the process layer equipment, so whenever there is equipment installation across intervals and new functions need to be expanded, a large number of cables must be reconnected, and of course new ones need to be added. Spacer equipment. the

On the other hand, the IEC61850 standard is the only international standard for the substation automation system based on the general network communication platform. On-site acceptance, operation, monitoring, diagnosis and maintenance costs save a lot of time and increase the flexibility of the automation system during use. It solves the problems of interoperability and protocol conversion of substation automation system products. The adoption of this standard can also enable substation automation equipment to have the characteristics of self-description, self-diagnosis and plug and play (Plug and Play), which greatly facilitates system integration, and its defined self-description can significantly reduce data management costs and simplify Data maintenance, reducing system downtime due to configuration errors. the

In the process of realizing the present invention, the inventor finds that there are at least the following problems in the prior art:

Although a lot of research on the IEC61850 standard has been carried out, and many manufacturers have announced that they have IEC61850 pilot projects put into operation, most of them have partially realized the IEC61850 standard or just provided an agent to support the IEC61850 standard. The IEC61850 standard is not a simple communication protocol. A substation automation system based entirely on the IEC61850 standard must be re-researched and designed in terms of system structure, model design, system database design, communication implementation, and intelligent electronic equipment production, rather than simple transformation of old equipment and systems. the

Therefore, there are still huge defects and deficiencies in the application of the IEC61850 standard in the technical solution at the present stage. the

Contents of the invention

The invention provides an integrated control method for an electrified railway digital traction substation, which is used to solve the problem of combining the IEC61850 standard with the integrated automation system of the electrified railway digital traction substation. the

In order to achieve the above object, the present invention provides an integrated control method for an electrified railway digital traction substation, which is applied to an electrified railway traction substation control system including a plurality of primary equipment intervals. The electrified railway traction substation control system is based on IEC61850 Standard configuration, the method at least includes the following steps:

The processing equipment corresponding to each primary equipment interval digitally processes the signal received by the primary equipment in the corresponding primary equipment interval;

The processing devices corresponding to each primary equipment interval respectively report their digitally processed information to the same integrated control device, so that the integrated control device can complete the protection measurement and control function for all primary equipment intervals. the

Preferably, the processing device corresponding to each primary device interval digitally processes the signal received by the primary device in the corresponding primary device interval, specifically including:

The processing equipment corresponding to each primary equipment interval performs substation modeling according to IEC61850;

The processing equipment corresponding to each primary equipment interval is in accordance with the IEC 61850-9-2 and GOOSE protocol format for the voltage transformer, current transformer, switching value, control value, and other analog information of the primary equipment interval corresponding to itself. Digitizing. the

Preferably, the processing equipment corresponding to each of the primary equipment intervals can also specifically configure the following functions:

Acquisition of current and voltage signals;

Acquisition of digital signals;

The control function of switch and electric knife switch;

It has the function of synchronizing with the processing equipment corresponding to other primary equipment intervals;

Communicate with smart devices via two channels of FX 100 fiber optic Ethernet in IEC618509-2 and GOOSE formats. the

Preferably, the processing equipment corresponding to each primary equipment interval performs substation modeling according to IEC61850, and also includes:

The processing device corresponding to each primary device interval generates an SCL file according to the modeling result, so as to realize automatic configuration and self-identification of the device. the

Preferably, the processing devices corresponding to each of the primary equipment intervals report their digitally processed information to the same integrated control device, so that the integrated control device completes the protection, measurement and control functions for all primary equipment intervals, specifically including :

The processing equipment corresponding to each of the primary equipment intervals is deployed in the process layer corresponding to each of the primary equipment intervals, and each of the process layers is respectively connected to the same integrated control device located in the interval layer through an optical switch. The processing devices corresponding to each of the primary device intervals respectively send the digitally processed information to the optical switch, and the optical switch reports to the integrated control device;

The bay layer is connected to the substation layer through another optical switch, and the integrated control device reports the processing result obtained according to the received digitally processed information to the substation layer through the other optical switch. the

preferred,

The process layer, the bay layer and the substation layer are all configured based on the IEC61850 standard. the

Preferably, the integrated control device specifically includes:

Embedded high-speed processor with dual Ethernet. the

Preferably, each of the process layers is respectively connected to the same integrated control device located at the bay layer through an optical switch, specifically including:

When the primary equipment interval is less than 16 hours, the process layers corresponding to each primary equipment interval are respectively connected to the same integrated control equipment located at the interval layer through the optical switch;

When the primary equipment interval is greater than 16 hours, all the process layers corresponding to the primary equipment interval of 10 kV are connected to the first integrated control equipment through a switch, and the process layers corresponding to the primary equipment interval of the main transformer and high-voltage main feed are connected through another The switch is connected to the second integrated control device;

Wherein, the first integrated control device completes the protection, measurement and control function of all devices corresponding to 10 kV, and the second integrated control device completes the protection, measurement and control function of the transformer. the

Preferably, while each of the process layers is connected to the same integrated control device located at the bay layer through an optical switch, it also includes:

The processing equipment located in each of the process layers is respectively connected to another integrated control device located in the bay layer through another optical switch, and each of the process layers is connected to the same integrated control device located in the bay layer through an optical switch to form redundant configuration;

Wherein, the two parties corresponding to the redundant configuration are automatic switching, and all devices in the redundant configuration use a unified synchronization signal. the

preferred,

The hardware structure of the electrified railway traction substation control system includes:

Analog acquisition and conversion plug-ins, including current and voltage input terminals, current transformers, voltage transformers, analog signal conditioning units, A/D conversion units, and QSPI interfaces;

Basic I/O and power plug-in, including power conversion monitoring and reset unit, RS232 interface, BDM unit, and RS485 interface;

Extended output and operation circuit plug-in, including photoelectric isolation input circuit, input terminal, photoelectric isolation output circuit, relay, output terminal;

Mainboard, including two 10/100M Ethernet communication control modules and hardware encryption modules, an enhanced multiplication and addition unit, and 64KB on-chip static memory and user-definable 16kB on-chip cache;

backplane; and/or,

The software structure of the electrified railway traction substation control system is specifically designed under the VxWorks operating system platform, combined with the IEC61850 layered and distributed architecture, adopting unified object modeling, and adopting object-oriented and modular software design methods. the

Compared with the prior art, the technical solution proposed by the embodiments of the present invention has the following advantages:

By applying the technical solution of the present invention, on the basis of a deep understanding of the IEC61850 framework, an integrated automation system that fully responds to IEC61850 is realized. The received signal is digitally processed, and the processing devices corresponding to each primary equipment interval report their digitally processed information to the same integrated control device, so that the integrated control device completes the protection, measurement and control functions for all primary equipment intervals . Thus, based on the IEC61850 standard, the integration management problem of digital traction substations for electrified railways is solved, and functions such as protection, measurement, control, signaling, fault recording, harmonic analysis, and fault location of traction substations are realized, and the traction substations for high-speed electrified railways are achieved. comprehensive automated management. the

Description of drawings

Fig. 1 is a schematic flow chart of an integrated control method for a digitized traction substation of an electrified railway proposed by an embodiment of the present invention;

Figure 2 is a schematic diagram of the system topology proposed in the embodiment of the present invention in a scenario where the interval between devices is less than 16 hours;

Figure 3 is a schematic diagram of the system topology proposed in the embodiment of the present invention in a scenario where the interval between devices is greater than 16 hours;

Fig. 4 is the schematic diagram of the hardware structure of a kind of described electric railway traction substation control system proposed by the embodiment of the present invention;

Fig. 5 is the schematic diagram of the overall signal flow of the software of a kind of electrified railway traction substation control system that the embodiment of the present invention proposes;

Fig. 6 is a schematic diagram of a publisher/subscriber communication structure proposed by an embodiment of the present invention;

FIG. 7 is a schematic diagram of a configuration process information flow reference model proposed by an embodiment of the present invention;

Figure 8 is a schematic diagram of the IEC61850 communication set framework;

Fig. 9 is a schematic diagram of simple modeling of LD_DIS;

Fig. 10 is the schematic diagram of LLN0 information modeling model;

Fig. 11 is a schematic diagram of the LPHD information model. the

Detailed ways

As mentioned in the background art, the current technical solutions still have huge defects and deficiencies in the application of the IEC61850 standard, and there are still huge development space and technical deficiencies. the

The present invention is proposed based on this problem, and the purpose is to design and develop a high-speed electrified railway traction substation comprehensive automation system based on the IEC61850 standard, and through its research and development, realize the application technology of railway digital traction substation comprehensive automation, this system Including the substation layer, bay layer and process layer, all three parts meet the IEC61850 standard, and adopt "in-situ digitalization" and "integration" protection schemes to realize maximum sharing of substation information on a real-time and reliable basis. "In-situ digitalization" refers to the installation of "in-situ digitalization" equipment near the primary equipment interval to digitize the information received by the primary equipment on the spot; the "integrated protection" scheme refers to the process layer of all intervals connected to an integrated IED through an optical switch , that is, an integrated IED completes the protection measurement and control functions of all intervals. the

As shown in Figure 1, it is a schematic flow chart of an integrated control method for an electrified railway digital traction substation proposed by an embodiment of the present invention, which is applied to the control system of an electrified railway traction substation including multiple primary equipment intervals. The substation control system is configured based on the IEC61850 standard, and the method specifically includes the following steps:

Step S101 , the processing device corresponding to each primary device interval digitally processes the signal received by the primary device in the corresponding primary device interval. the

The processing of this step is to realize the "in-situ digital" processing of the signal. In a specific application scenario, "in-situ digitization" equipment can be installed near the primary equipment interval to digitize the information received by the primary equipment on-site. the

Through such processing, only one device is used to complete the functions of a spaced merging unit and an intelligent terminal, and the output is only connected to the control room by an optical cable. the

In an actual application scenario, the processing of this step specifically includes:

Step A, the processing equipment corresponding to each primary equipment interval performs substation modeling according to IEC61850. the

In a specific application scenario, the processing in this step further includes that the processing device corresponding to each primary device interval generates an SCL file according to the modeling result, so as to realize automatic configuration and self-identification of the device. the

Specifically, the substation modeling model in this step is shown in Table 1. the

Table 1

Step B, the processing equipment corresponding to each primary equipment interval, according to IEC 61850-9-2 and IEC 61850-9-2 and Digitized in GOOSE protocol format. the

It should be further explained that the processing device corresponding to each primary device interval can also be configured with the following functions:

(1) Acquisition of current and voltage signals: it can be connected to optical fiber digital ECT and EVT; it can be connected to analog output ECT and EVT; it can be connected to traditional CT and PT signals, with a maximum of 14 channels and a cycle sampling point of 24~ 96 points adjustable. the

(2) Acquisition of digital signals: It can collect remote signals such as switch position, knife switch position, switch lock node, etc., up to 16 channels. the

(3) Control function: It has an operation circuit, which can control the switch and electric knife switch, and can complete the opening and closing of 5 switches. the

(4) With synchronization function: it has the function of synchronous sampling of "on-site digital equipment" in the whole station, ensuring the requirements such as transformer differential, bus differential, and electricity metering. the

(5) Communicate with smart devices through two channels of FX 100 fiber optic Ethernet in IEC618509-2 and GOOSE formats. the

(6) Standardization of software and hardware equipment for "on-site digital equipment" greatly reduces the number of spare parts. the

(7) It has an on-site status indicator light and a complete self-test function. the

Step S102 , the processing devices corresponding to each primary equipment interval respectively report their digitized and processed information to the same integrated control device, so that the integrated control device completes the protection measurement and control function for all primary equipment intervals. the

The processing in this step is to realize the "integrated protection" solution. the

"Integrated protection" means that the process layer of all primary equipment intervals is connected to an integrated IED through an optical switch, that is, one integrated IED completes the protection, measurement and control functions of all primary equipment intervals, and the internal protection, measurement and control software of "integrated protection" runs independently. The "integrated protection" digital traction substation is based on the mature TDI-3000 series software and hardware platform. In order to achieve the maximum sharing of substation information on a real-time and reliable basis, the process layer, interval layer and substation layer all meet the IEC 61850 standard The digital traction substation solution for electrified railways is the first proposed and commercialized system at home and abroad. the

In the actual application scenario, the processing of this step specifically includes:

The processing equipment corresponding to each of the primary equipment intervals is deployed in the process layer corresponding to each of the primary equipment intervals, and each of the process layers is respectively connected to the same integrated control device located in the interval layer through an optical switch. The processing devices corresponding to the respective primary device intervals respectively send the digitally processed information to the optical switch, and the optical switch reports to the integrated control device. the

The bay layer is connected to the substation layer through another optical switch, and the integrated control device reports the processing result obtained according to the received digitally processed information to the substation layer through the other optical switch. the

Wherein, the process layer, the bay layer and the substation layer are all configured based on the IEC61850 standard. the

After the "in-situ" digitalization of primary equipment according to intervals and comprehensively, the technical key to be solved is: how to share these synchronized information reliably and in real time. The embodiment of the present invention adopts high-speed processing with embedded dual Ethernet As the core of the "in-situ digitalization" that is, the comprehensive self-measurement and control protection unit, it can complete protection, measurement, power quality monitoring, fault location, fault recording, five-proof operation, bus differential protection, Functions such as failure protection, backup power automatic switching, etc., and adopt "redundant" configuration, and automatic switching, all equipment adopts unified synchronization signal, generally adopts GPS time synchronization system, also double backup, dual Ethernet adopts FX 100 optical fiber Communication, dual industrial-grade optical Ethernet switches and dual-star bus structure constitute an independent and reliable dual-network redundant information channel, which makes information transmission reliable and real-time. the

Further, in order to further improve the reliability of the system, while each of the process layers is respectively connected to the same integrated control device located at the bay layer through an optical switch, the following redundant processing is also included:

The processing devices at each of the process layers are respectively connected to another integrated control device at the bay layer through another optical switch, and each of the process layers is respectively connected to the same integrated control device at the bay layer through an optical switch to form A redundant configuration, wherein the two parties corresponding to the redundant configuration are automatic switching, and all devices in the redundant configuration use a unified synchronization signal. the

According to the difference of the specific equipment interval, the processing of this step can be divided into the following two situations:

Situation 1: When the primary equipment interval is less than 16 hours, the process layers corresponding to each primary equipment interval are respectively connected to the same integrated control device at the interval layer through an optical switch. the

As shown in FIG. 2 , it is a schematic diagram of a system topology proposed by an embodiment of the present invention in a scenario where a device interval is less than 16 hours. the

Among them, EPT means electronic voltage transformer, ECT means electronic current transformer, I/O means digital input and control output, CT means conventional current transformer, OCT means optical fiber current transformer, PT means conventional voltage Transformer, OPT means optical fiber voltage transformer. the

Case 2: When the primary equipment interval is greater than 16 hours, all the process layers corresponding to the primary equipment interval of 10 kV are connected to the first integrated control equipment through a switch, and the process layers corresponding to the primary equipment interval of the main transformer and high-voltage main feeder Access the second integrated control device through another switch. the

Wherein, the first integrated control device completes the protection, measurement and control function of all devices corresponding to 10 kV, and the second integrated control device completes the protection, measurement and control function of the transformer. the

Specifically, as shown in FIG. 3 , it is a schematic diagram of a system topology structure proposed in an embodiment of the present invention in a scenario where a device interval is greater than 16 hours. the

In the structure shown in Figure 3, when the interval is greater than 16 hours, connect all the process layers of 10 kV intervals to a switch, consider redundant access to optical switch 1 and switch 2; connect the main transformer and high-voltage main The process layer is connected to another switch, considering redundant access to switch 3 and switch 4. the

Among them, integrated IED1 and integrated IED2 have the same functions, and complete the protection, measurement and control functions of all 10kv units; integrated IED3 and integrated IED4 have the same functions, and complete the protection, measurement and control functions of transformers. Integrate IED5 to complete telecontrol protocol conversion. the

In the specific above-mentioned technical scheme, the hardware structure of the traction substation control system of the electrified railway is as shown in Figure 4, including:

Analog acquisition and conversion plug-ins, basic I/O and power supply plug-ins, extended output and operating circuit plug-ins, and also include the main board and backplane. the

(1) Its core is the motherboard, and the CPU adopts the high-performance The 32-bit microprocessor MCF5275 with the V2 core can provide up to 159MIPS processing capability (Dhrystone 2.1) at a clock frequency of 166MHz, and low power consumption. MCF5275 adds some modules to the previous device: including the second 10/100M Ethernet communication control module and hardware encryption module, an enhanced multiplication and addition operation unit (eMAC), plus 64KB on-chip static memory and user-definable 16kB on-chip high-speed cache (Cache), which can greatly improve system performance and reduce overall costs. 32M DDR on the motherboard is used for program operation and temporary data storage, and 16M FLASH is used to store information such as application programs and configuration files. 2Mbytes of NVRAM; high-precision real-time clock; 10/100M adaptive dual Ethernet supports RJ45 or FX100 fiber optic interface.

(2) Analog acquisition and conversion plug-in

The analog acquisition and conversion plug-in includes current and voltage input terminals, current transformers, voltage transformers, analog signal conditioning units, A/D conversion units, and QSPI interfaces. The analog quantity acquisition and conversion plug-in completes the acquisition of analog quantity and converts it into digital quantity output by A/D for CPU calculation. It is used to isolate and transform the analog quantity signal into a small voltage signal. D conversion precision is 16 bits. the

When using ECT and EUT to realize the transmission of sampled values, replace it with an intelligent analog acquisition plug-in. the

(3) Basic I/O and power plug-in

The basic I/O and power plug-in includes power conversion monitoring and reset unit, RS232 interface, BDM unit, and can also include RS485 interface. This plug-in is used to provide switching power supply with external DC 220V (110V) or AC 220V input and 3 DC voltage outputs; 4 DC24V passive switch inputs and 10 DC220V external active switch inputs. Among them, 24V switch input is used for short-distance signal or other weak voltage signal acquisition in the screen (cabinet); DC220V active switch input is used for long-distance signal acquisition, which has better anti-interference ability. Support 5-way switch output, which can be used for both driving operation circuit and signal output. the

(4) Extended output and operation loop plug-in

This plug-in expands 7 switching outputs through various safety locks and an operating circuit of a circuit breaker, specifically including photoelectric isolation input circuits, input terminals, photoelectric isolation output circuits, relays, and output terminals. All switching outputs are designed with a switching capacity exceeding 5A (DC220V), making it suitable for a variety of applications. the

(5) Backplane

Realize the interconnection of electrical signals among the various plug-ins. the

On the other hand, the software platform of the electrified railway traction substation control system is established under the VxWorks operating system platform, combined with the IEC61850 layered and distributed architecture, using unified object modeling, and adopting object-oriented and modular software design Method design, the overall data flow diagram of the software is shown in the figure below. The software consists of logical node templates (which define which logical node instances can be generated by the device), real-time databases of each object (logic node instance attributes), and abstract communication service interfaces of objects (ACSI), protection monitoring algorithm (they update the attributes of each object when they run), configuration management program, XML processing module, MMS protocol processing module, transport layer message sending and receiving module, human-computer interaction and other components. The object real-time database contains the status and parameters of the IED during operation; ACSI is responsible for the communication management of the object; on the one hand, the configuration management and XML processing module can read and analyze the IED configuration file configured by professionals, and generate or modify it after obtaining the configuration information This device provides the object instance of the template, on the other hand, the original SCL configuration file can also be modified according to the setting of the device by the local operator; each protection monitoring algorithm uses the real-time data of the relevant object to calculate and judge, and update the real-time data of the object, Under certain circumstances, the transmission of high-real-time messages is started by means of software interrupts; the transport layer message sending and receiving module is responsible for organizing and managing the communication queues, data buffers, etc. according to the priority of the messages; the internal The communication protocol is the software interface for each plug-in communication inside the device to complete the communication tasks inside the device. The method similar to the standard can be used for specific implementation; the MMS protocol processing module is located between the application layer and the TCP/IP layer, and is responsible for each object of the server. Mapping and transformation of its visible functions. MMS organizes system resources in the form of virtual manufacturing device (VMD). A real device is mapped to one or more VMDs, and each VMD client accesses the data of the real device through the VMD server encapsulated by the application process. MMS provides general information services (such as writing, reading, etc.), and can integrate devices from different manufacturers to realize unified information exchange and resource sharing. the

As shown in FIG. 5 , it is a schematic diagram of the overall signal flow of the software of an electrified railway traction substation control system proposed by the embodiment of the present invention. the

In the design of its communication mode, services such as data acquisition, setting, and file transfer between the bay layer equipment and the substation layer equipment adopt the C/S mode, while the transmission of sampling values, GOOSE/GSSE and other messages adopts the following figure Publisher/subscriber pattern for design. the

As shown in FIG. 6 , it is a schematic diagram of a publisher/subscriber communication structure proposed by the embodiment of the present invention. the

Combined with IEC61850, the system configuration uses XML-based SCL to describe the communication-related IED configuration and parameters, communication system configuration, switch interval and their relationship, and realizes the device of the embodiment of the invention from a single product state to being configured as a substation automation system. The entire configuration information transmission and exchange process of the instantiated IED. the

As shown in FIG. 7 , it is a schematic diagram of a configuration process information flow reference model proposed by an embodiment of the present invention. the

Compared with the prior art, the technical solution proposed by the embodiments of the present invention has the following advantages:

By applying the technical solution of the present invention, on the basis of a deep understanding of the IEC61850 framework, an integrated automation system that fully responds to IEC61850 is realized. The received signal is digitally processed, and the processing devices corresponding to each primary equipment interval report their digitally processed information to the same integrated control device, so that the integrated control device completes the protection, measurement and control functions for all primary equipment intervals . Thus, based on the IEC61850 standard, the integration management problem of the electrified railway digital traction substation is solved, and functions such as protection, measurement, control, signal, fault recording, harmonic analysis, and fault location of the traction substation are realized, and the high-speed electrified railway traction substation is achieved. Comprehensive automation management. the

In order to further illustrate the technical idea of the present invention, the technical solution of the present invention will now be described in conjunction with specific application scenarios. the

The technical solution proposed by the embodiment of the present invention realizes the functions of protection, measurement, control, signal, fault recording, harmonic analysis, fault distance measurement and the like of the traction substation. Select photoelectric transformers and intelligent primary switches, which can directly exchange information with secondary equipment using optical fiber Ethernet, design and develop the monitoring and management system in the substation floor, responsible for collecting the information of the whole station, and complete the state monitoring and control of the equipment in the station. The design and development of the interval layer can be seamlessly combined with photoelectric transformers and intelligent primary switches, and compatibility requirements are considered. At the same time, it can also be connected to traditional primary equipment, which can be plug-in protection devices, measurement and control devices, and automatic devices according to requirements. Realize the linkage and cooperation with the remote viewing system, and achieve the comprehensive automation of the high-speed electrified railway traction substation. It involves computer software and hardware technology, power system relay protection, power system automation, power system fault analysis and other disciplines and technical fields. Only the key technical principles are described below. the

(1) Adopt the latest and most advanced substation communication protocol IEC61850. the

The embodiment of the present invention starts from the goal of IEC61850 and conducts device communication development on the basis of in-depth understanding of the standard. The goal includes realizing interoperability, supporting free distribution of functions, and supporting function expansion. Its primary goal is to realize the complete interoperability between the substation automation functions or sub-functions in the IEDs distributed in different manufacturers in the substation. In order to achieve the interoperability goal, according to IEC61850, the substation automation system functions, equipment and communication system are established. The upper-level model and the underlying communication protocol are completely separated, and the coupling between communication protocol data and semantics is removed. The semantics are defined in the upper-level model and bound to the object name. The hierarchical model and object reference name form a hierarchical Determine the semantics, which not only ensures the realization of interoperability, but also enhances the long-term stability of the standard. At the same time, in order to realize the free distribution of functions, according to IEC61850, the substation automation function is decomposed into multiple logical nodes that communicate with each other. With the support of the communication system, Logical nodes can be freely distributed in each IED. IEC61850 does not define its own communication protocol. It uses mature communication protocols and technologies. In order to ensure interoperability, according to the functional model and its distribution mode, the IED information model and The service model adopts the object-oriented modeling method to build the IED device function module in the embodiment of the present invention, and the communication architecture realizes the information model and the service model. The communication set framework is shown in the figure below, and innovation is improved through The logical structure of the data and the storage structure based on the binary tree are used to realize the information model. At the same time, the networking method is studied. Through the two general networking methods of merging or separating the process bus and the station bus, the network redundancy scheme is analyzed. As The networking of the substation layer and the networking scheme of the integrated automation equipment. the

As shown in FIG. 8 , it is a schematic diagram of an IEC61850 communication set framework. the

(2) Mature, stable and reliable relay protection principle. the

Among the various microcomputer protection devices in TDI-3000 series products, many different protection principles are adopted for different types of protection devices. These principles all adopt mature, stable and reliable algorithms that have been tested in practice. Among them, there are four main blocks: line protection, transformer differential main protection, transformer backup protection, and capacitor protection. Line, overload protection, low cycle, low-voltage load shedding, three-phase primary reclosing; transformer differential main protection includes: differential quick-break protection, ratio differential protection, high value ratio differential, power frequency variation ratio differential protection , Differential current limit alarm, excitation inrush current blocking; transformer backup protection includes: composite voltage direction overcurrent protection, bus charging protection, zero sequence overcurrent protection, zero sequence overvoltage protection, overload, overload start ventilation, overload blocking Voltage regulation; capacitor protection includes: three-stage definite time overcurrent protection, overvoltage protection, low voltage protection, differential voltage protection, unbalanced voltage (zero sequence voltage) protection, unbalanced current, bridge differential current protection, zero sequence current protection . the

In the above technical solution, the embodiment of the present invention implements the I2C bus protocol by using the CPLD programmable logic device and the VHDL hardware programming language, and realizes the communication between the man-machine interface module and the main control CPU through the I2C bus. And applied embedded real-time operating system and embedded database. the

On the other hand, the embodiment of the present invention also realizes the information model innovatively through the improved data logic structure and the storage structure based on the binary tree. The general networking mode, the network redundancy scheme is analyzed, as the substation layer networking and the networking scheme of the integrated automation equipment. the

According to the IEC61850 protocol system and the actual application of railway traction substations, the whole system is equipment-oriented and object-oriented modeling, adopts abstract communication service interface, the application layer protocol of the network and the network transport layer protocol are independent; it has communication services in line with the characteristics of power systems, information The object is uniquely defined at the information source, the data object is modeled uniformly, and the configuration technology of XML is adopted. the

1) Using object-oriented design and programming (OOD/OOP) technology, through the abstract modeling of the entire traction substation, each IED contains one or more servers, each server contains one or more logic devices, and the logic devices include Logical nodes, logical nodes contain data objects, data objects encapsulate the attributes and operation methods of the object, and are accessed by other objects through external interfaces, for example, complete distance protection can be decomposed into IHMI, ITCI, ITMI, PDIS, TCTR, TVTR, and XCBR are several LNs. PDIS is distributed in the protection IED. This IED contains the LD name LD_DIS for distance protection. Its simple modeling is shown in Figure 9. the

The LLN0 information modeling model is shown in Figure 10. the

The information model of LPHD is shown in Figure 11. the

Based on this design idea, the self-developed programmable configuration tool software, the modular programming method ensures the maintainability and consistency of the software product, greatly shortens the time of software programming and debugging, and also facilitates various Project user needs customization. the

2) Adopt XML configuration technology and apply substation configuration description language (SCL) to describe the structure and parameters of local equipment related to communication, communication architecture, switch bay (function) structure and the relationship between them, so that the configuration information is independent of the platform In between, the self-description of the device is realized, the XML parser is embedded, and the dynamic configuration is realized. the

4) For the first time, integrate IEC61850 SV (multicast sampling value), GOOSE (general object-oriented substation event), TimeSync (SNTP) (time synchronization), MMS ProtocolSuite (core ACSI service) and GSSE (general substation status event) etc. Based on an automation system, it changes the way to realize the automation function of the traditional railway traction substation and solves the cost. the

The information set framework covers IEC61850 SV (multicast sampling value), GOOSE (general object-oriented substation event), TimeSync (SNTP) (time synchronization), MMS ProtocolSuite (core ACSI service) and GSSE (general substation state event), Relying on this, it has changed the way of realizing the automation function of traditional railway traction substations. It is the first integrated solution for railway traction substations in China based on independent intellectual property rights of our company. It has the best information sharing function and increases information. effective utilization rate. Based on this, any function required by the substation automation system can be expanded on the shared hardware platform with little software design cost. Complete centralized protection automation functions such as backup power supply self-injection, small current grounding line selection, busbar protection, switch chain operation, failure protection, etc. without adding other hardware devices, without any design, construction and additional operation and maintenance costs , which cannot be accomplished by other general substation comprehensive automation. That is, it is reliable and reduces secondary equipment, greatly reducing the cost of use and maintenance. However, the input information of the traditional substation integrated automation system is repeated, which is not conducive to the effective storage of information by the storage device; the output information cannot be shared, so that the information cannot be used effectively. Every time a small function is added, the corresponding equipment must be added, which not only increases the economic cost and construction workload, but also increases the probability of failure, making troubleshooting more difficult, and making the operation and maintenance work complicated and cumbersome , invest more manpower and material resources. the

After the system construction proposed by the embodiment of the present invention is completed, the technical level of the existing domestic high-speed railway traction substation automation system will be greatly improved, the engineering cost of the substation automation system will be reduced, the safe and stable operation level of the substation automation system will be improved, and development will be saved , acceptance, and maintenance manpower and material resources to achieve complete interoperability. Substation integrated automation technology occupies an important position in electrified railway power supply technology, and is an important technical basis for the development of high-speed railways and the upgrading of traditional railways. These include sophisticated detection technology, efficient digital signal processing technology, low power consumption, high integration, powerful embedded system development technology, safe and fast network communication technology, etc. It is of great significance for my country to realize the leapfrog development of teaching and scientific research in the field of high-speed railway digital traction substation automation. the

my country has stepped into the climax of the construction of high-speed railways and urban rail transit. The development of China's high-speed railways has gone through the course of half a century in developed countries in less than ten years. The support of all these achievements is not only the successful development of localized electric locomotives, but also the wide application and continuous development of digital traction substations along railway lines. Its requirements for reliability and timeliness are significantly higher than those for civil and electric power substations. The comprehensive traction power supply substations of electrified railways The automation system (the embodiment of the present invention) is the core equipment for the reliable operation of the traction substation, but it is also necessary to see that the performance indicators, standardization level, maintenance and operation costs, and appearance of a complete set of domestic comprehensive automation equipment are obviously weaker than imported equipment. Communication barriers and debugging difficulties are very large. The Beijing-Shanghai high-speed railway still uses a full set of imported substation integrated automation equipment, but this full set of imported substations will gradually be replaced by more suitable and inexpensive domestic equipment. Domestically produced The status of equipment relying solely on price advantages to replace imported equipment will be replaced by advanced equipment with first-class performance that maintains price advantages. Therefore, the research and development of this project is not only the economic significance of catching up with the performance of imported equipment and replacing imported equipment, but more importantly, the significance of relying on local technology to fully guarantee the safe operation of railways. 

The comprehensive automation system of traction substation is similar to the comprehensive automation equipment of high-level substations in the power industry in terms of composition and structure, but the use requirements and technical characteristics are quite different. The comprehensive automation equipment of traction substation is a high-end automation equipment in the railway industry, and its extended products are numerous. It is the commanding height of technical competition among manufacturers supplying and serving the railway industry. the

Applying the IEC61850 standard in railway traction substations, and striving to promote its application, can standardize communication protocols that are currently unnecessary, thereby greatly improving the level of substation automation technology, improving the level of safe and stable operation of substation automation, and saving development, acceptance, and use. And the manpower and material resources of maintenance, fully realize interoperability, break the barriers of manufacturer agreements, achieve the interchange of smart devices of different manufacturers, seamless integration of communication, and common use. the

1) The adoption of the IEC61850 protocol helps to prevent manufacturers from setting up protocol barriers, and each device requires interconnection, which is conducive to reducing maintenance and operation costs and equipment update costs. the

2) Signal transmission is realized by computer communication technology. While transmitting effective information, it transmits information check code and channel self-inspection information. On the one hand, it eliminates mistransmission signals, and on the other hand, it can provide technical alarms when the communication system fails. Digital signals use Optical fiber transmission fundamentally solves the interference problem and greatly improves reliability. The realization of information sharing in the station does not need to add additional hardware, which reduces equipment investment and maintenance costs, and also increases reliability. the

3) Due to a large amount of information sharing and saving of some devices, a large number of cable connections are reduced and complex logic connections are omitted to make the design simple and direct, which greatly reduces the laying of cables and the verification caused by it in the construction of substations When expanding capacity, it is only necessary to add corresponding local digital devices at the primary equipment, and configure corresponding software modules at the substation level without adding hardware, and only a few optical cables and a few pairs of power supplies are connected to the control room at one time Line, because the original information sharing of the whole station can detect the status of one or two times online, and give a reminder in real time. It makes the design, construction, expansion, maintenance and repair easier and the cost is greatly reduced. the

4) Cables are saved, and some centralized processing devices are also saved. At the same time, the cost and maintenance costs of each cycle of the substation are greatly reduced. a lot of. the

5) Cooperate with substation on-line insulation monitoring to improve automation and management level

The information transmitted by the communication system is more complete, and its reliability and real-time performance are greatly improved. Together with the online insulation monitoring system, more and more complex automation functions can be realized, and the automation level can be improved. For example, it is possible to diagnose whether the equipment is Health in turn enables state-of-the-art maintenance. the

Compared with prior art, the present invention has the following advantages:

By applying the technical solution of the present invention, on the basis of a deep understanding of the IEC61850 framework, an integrated automation system that fully responds to IEC61850 is realized. The received signal is digitally processed, and the processing devices corresponding to each primary equipment interval report their digitally processed information to the same integrated control device, so that the integrated control device completes the protection, measurement and control functions for all primary equipment intervals . Thus, based on the IEC61850 standard, the integration management problem of digital traction substations for electrified railways is solved, and functions such as protection, measurement, control, signaling, fault recording, harmonic analysis, and fault location of traction substations are realized, and the traction substations for high-speed electrified railways are achieved. comprehensive automated management. the

Through the above description of the embodiments, those skilled in the art can clearly understand that the present invention can be realized by hardware, or by software plus a necessary general hardware platform. Based on this understanding, the technical solution of the present invention can be embodied in the form of software products, which can be stored in a non-volatile storage medium (which can be CD-ROM, U disk, mobile hard disk, etc.), including several The instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute the methods described in various implementation scenarios of the present invention. the

Those skilled in the art can understand that the accompanying drawing is only a schematic diagram of a preferred implementation scenario, and the modules or processes in the accompanying drawings are not necessarily necessary for implementing the present invention. the

Those skilled in the art can understand that the modules in the devices in the implementation scenario can be distributed among the devices in the implementation scenario according to the description of the implementation scenario, or can be located in one or more devices different from the implementation scenario according to corresponding changes. The modules of the above implementation scenarios can be combined into one module, or can be further split into multiple sub-modules. the

The above serial numbers of the present invention are for description only, and do not represent the pros and cons of the implementation scenarios. the

The above disclosures are only some specific implementation scenarios of the present invention, however, the present invention is not limited thereto, and any changes conceivable by those skilled in the art shall fall within the protection scope of the present invention. the

Claims (10)

1. the integrated control method of an electrified railway digital traction substation, it is characterized in that, be applied to comprise in the electric railway traction Substation control system at a plurality of primary equipments interval, described electric railway traction Substation control system is configured based on IEC61850 standard, and described method at least comprises the following steps:

The signal that each corresponding treatment facility in primary equipment interval receives the primary equipment in self corresponding primary equipment interval carries out digitized processing;

Each corresponding treatment facility in primary equipment interval is given same integrated-control apparatus by the information reporting after digitized processing separately respectively, so that described integrated-control apparatus completes the protection observing and controlling function to all primary equipments interval.

2. the method for claim 1, is characterized in that, the signal that described each corresponding treatment facility in primary equipment interval receives the primary equipment in self corresponding primary equipment interval carries out digitized processing, specifically comprises:

Described each corresponding treatment facility in primary equipment interval carries out transformer station's modeling according to IEC61850;

Described each corresponding treatment facility in primary equipment interval is pressed IEC61850-9-2 and the digitlization of GOOSE rule schemata to voltage transformer, current transformer, switching value, controlled quentity controlled variable, other analog quantity information at self corresponding primary equipment interval.

3. method as claimed in claim 2, is characterized in that, described each corresponding treatment facility in primary equipment interval, specifically can also configure following functions:

The collection of electric current, voltage signal;

The collection of digital signal;

Control function to switch, electric knife gate;

There is the synchronizing function with other corresponding treatment facilities in primary equipment interval;

With IEC618509-2 and GOOSE form, pass through two-way FX100 fiber optic Ethernet and smart machine communication.

4. method as claimed in claim 2, is characterized in that, described each corresponding treatment facility in primary equipment interval carries out transformer station's modeling according to IEC61850, also comprises:

Described each corresponding treatment facility in primary equipment interval, according to modeling result, generates SCL file, realizes automatic configuration and the self-identifying of equipment.

5. the method for claim 1; it is characterized in that; described each corresponding treatment facility in primary equipment interval is given same integrated-control apparatus by the information reporting after digitized processing separately respectively; so that described integrated-control apparatus completes the protection observing and controlling function to all primary equipments interval, specifically comprise:

Described each corresponding treatment facility in primary equipment interval, be deployed in described each corresponding process layer in primary equipment interval, described in each, process layer accesses by optical switch the same integrated-control apparatus that is arranged in wall respectively, described each corresponding treatment facility in primary equipment interval sends to described optical switch by the information after digitized processing separately respectively, and reports described integrated-control apparatus by described optical switch;

Described wall is by another optical switch access substation level, and described integrated-control apparatus will report described substation level by described another optical switch according to the resulting result of information after the digitized processing receiving.

6. method as claimed in claim 5, is characterized in that,

Described process layer, described wall and described substation level are all configured based on IEC61850 standard.

7. method as claimed in claim 5, is characterized in that, described integrated-control apparatus, specifically comprises:

The high speed processor of embedded Dual-Ethernet.

8. method as claimed in claim 7, is characterized in that, described in each, process layer accesses by optical switch the same integrated-control apparatus that is arranged in wall respectively, specifically comprises:

When primary equipment interval is less than 16 hours, described each corresponding process layer in primary equipment interval accesses by optical switch the same integrated-control apparatus that is arranged in wall respectively;

When primary equipment interval is greater than 16 hours, the process layer at the primary equipment interval of all corresponding 10 kilovolts accesses the first integrated-control apparatus by a switch, and the process layer at the primary equipment interval that corresponding main transformer and high pressure master enter accesses the second integrated-control apparatus by another switch;

Wherein, described the first integrated-control apparatus completes the protection observing and controlling function of 10 kilovolts of corresponding all devices, and described the second integrated-control apparatus completes the protection observing and controlling function of transformer.

9. the method as described in claim 5 or 8, is characterized in that, when described in each, process layer accesses by optical switch the same integrated-control apparatus that is arranged in wall respectively, also comprises:

The treatment facility that is arranged in process layer described in each is positioned at respectively another integrated-control apparatus of wall by another optical switch access, process layer described in each access to the same integrated-control apparatus formation redundant configuration that is positioned at wall by optical switch respectively;

Wherein, the corresponding both sides of described redundant configuration are automatic switching, and all devices in described redundant configuration adopts unified synchronizing signal.

10. method as claimed in any of claims 1 to 8 in one of claims, is characterized in that,

The hardware configuration of described electric railway traction Substation control system comprises:

Analog acquisition and conversion plug-in unit, comprise electric current, voltage input end, current transformer, voltage transformer, analog signal conditioner unit, A/D converting unit, QSPI interface;

Basic I/O and power insert, comprise power conversion monitoring and reset unit, RS232 interface, and BDM unit, can also comprise RS485 interface;

Expansion output and operation circuit plug-in unit, comprise that photoelectricity keeps apart into circuit, opens into terminal, photoelectricity isolation digital output circuit, relay, outputs terminal;

Mainboard, comprises two 10/100M ethernet communication control modules and hardware encryption module, an enhancement mode multiply-add operation unit, and 64KB sheet in static memory and the definable 16kB sheet of user internally cached;

Backboard; And/or,

The software configuration of described electric railway traction Substation control system, be specially under vxworks operating system platform, in conjunction with IEC61850 layering, distributed architecture, adopt unified object modeling, adopt object-oriented and the design of modular software method for designing.