CN105790229A - IEC61850-based feeder protection device for railway traction power supply system - Google Patents
IEC61850-based feeder protection device for railway traction power supply system Download PDFInfo
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- CN105790229A CN105790229A CN201410769286.XA CN201410769286A CN105790229A CN 105790229 A CN105790229 A CN 105790229A CN 201410769286 A CN201410769286 A CN 201410769286A CN 105790229 A CN105790229 A CN 105790229A
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Abstract
The invention provides an IEC61850-based feeder protection device for a railway traction power supply system. The IEC61850-based feeder protection device comprises the following steps: (1) defining a data model of a distance protection LN and a traction power supply characteristic LN of the traction power supply system, and building a complicated distance protection model formed by cooperation of a plurality of functions on the basis of the data model; and (2) defining the data model of a reactance-distance table LN of the traction power supply system and building a fault location model on the basis of the data model. The IEC61850-based feeder protection device for the railway traction power supply system is based on the particularity of the railway traction power supply system; the feeder distance protection model and the fault location model are built strictly according to the IEC61850 standard; the feeder protection device comprises all necessary data model information; the data model irrelevant to the railway traction power supply system is rejected; the special requirements of AC electrified railway feeder protection are met; and the application field of the IEC61850 standard is expanded.
Description
Technical field
The present invention relates to a kind of railway traction power supply system feeder protection equipment based on IEC61850, belong to railway power field.
Background technology
Railway, as national economy large artery trunks, country's important infrastructure and the popular vehicles, plays vital effect in China's socio-economic development, has the status that can not be substituted.By the end of the end of the year 2012, china railway revenue kilometres reach 9.8 ten thousand kilometers, occupy second place of the world, and high ferro operation mileage reaches 9356 kilometers, ranks first in the world.Planning according to 12, by 2015, china railway revenue kilometres to reach 120,000 km, and electrification rate to reach about 60%, and incident will be that electric railway is newly-built on a large scale and reconstruction and extension project.The important component part of electric railway is tractive power supply system, and traction substation is one of two big core components of tractive power supply system, being the power supply supplier of tractive power supply system, the traction substation that therefore construction technique is advanced, stable is to ensure that the key factor of the safe, reliable, efficient operation of tractive power supply system or even whole electric railway transportation system.And the traction substation applying IEC61850 standard will be provided with many significant advantages, such as layer architecture, entirely stand information digitalization, communications platform networking etc., the shortcoming which overcoming tradition traction substation, represent the developing direction in future.
IEC61850 standard has open, the technical system faced the future, and is presently the most advanced, the most comprehensive, can to cover whole Substation Communication System and communication network up-to-date international standard.It summarizes UCA2.0 and IEC60870 series standard experience, there is OO data modeling, communication data self-described, transmit information layered, Abstract Common Service Interface and particular communication service map independent, support the features such as interoperability, receive significant attention in worldwide.External major company such as Siemens, ABB, ALSTOM etc. are ripe to the theoretical research of this standard, are proposed the product supporting IEC61850, and have successful engineer applied.Domestic IEC61850 standard is also paid much attention to, rapidly IEC61850 is converted, promulgate as power industry proposed standard, and carry out, promoted China's automation of transformation substations level greatly.The main production commercial city of domestic electrical industry is being actively developed the Novel transformer substation automated system product based on IEC61850, and has many successful cases.
Meanwhile, IEC61850 standard also in the latest development trend actively following the tracks of and studying IEC61850, is applied in up-to-date system and device by the enterprise of railway power relevant industries.One top priority of application IEC61850 standard is intelligent electronic device (IED) model set up and meet this standard.All functions of IED have been decomposed, have been used logical node LN(LogicalNode by the concept that IEC61850 is freely distributed based on function and distributes) these functions are described, LN is the least unit that function divides, and several LN have coordinated a specific function；One group of relevant LN forms a logical device LD(LogicalDevice)；Server (SERVER) is the abstract model of IED equivalent function, represents the external visibility of IED.IEC61850 has formulated object-oriented data model in detail, and with SCL language, IED configuration is described.These features make the IED model based on IEC61850 and traditional IED information describe important difference.
In traction substation in numerous secondary intelligent electronic devices; feeder protection equipment is very important IED; it is responsible for protection tractive power supply system supply line; i.e. feeder line contact net in other words; and electric railway traction power supply system is compared with general three-phase alternating-current powered circuit, there are many different features: single-phase；Locomotive load directly takes stream from network by moving contact, includes bigger harmonic component；Impedance loop is big；Under system minimum operational mode during the short circuit of supply arm end, short circuit current is numerically likely to be more or less the same with maximum load current；Service condition is severe, and fault rate is relatively big and without standby etc..For this, it is desirable to the main protection of traction substation protection for feed line and distance protection should have reliability and the sensitivity of height；And after contact net breaks down, it is necessary to being accurately positioned abort situation, it is desirable to feeder protection equipment possesses fault localization function, fault localization, to repairing supply line in time, reduces because the traffic interruptions caused that has a power failure has important function.As can be seen here, how classifying rationally function set up corresponding logical node LN, and set up distance protection model and the fault localization model of feeder protection equipment based on this, it is primary premise and the key factor of application IEC61850 standard.
Summary of the invention
It is an object of the invention to provide a kind of railway traction power supply system feeder protection equipment model based on IEC61850; to solve the problem that railway traction power supply system application IEC61850 standard carries out feeder protection equipment sophisticated functions modeling; meet attached wires of AC electrified railway protection for feed line particular/special requirement, expand the application of IEC61850 standard.
For achieving the above object, the present invention establishes and is main protection with distance protection, possesses the feeder protection equipment data model of fault localization function, and step is as follows:
1) define the data model of tractive power supply system distance protection LN and traction power supply impedance operator LN, establish the complicated distance protection model constituted with multiple functions based on this；
2) data model of definition tractive power supply system reactance distance table LN, establishes fault localization model based on this；
In step 1), first the feature according to the feature of railway traction power supply system feeder protection equipment main protection distance protection impedance polygon and carrying out step by step distance protection, sets up distance protection logical node PDIS and the data model of impedance operator logical node QDIC；Then the particular/special requirement according to distance protection; by its Function Decomposition; distinguish function and the communicating requirement of distance protection; complete function allocative decision; to need the Function Decomposition of data exchange in the LN of each correspondence, this model comprises TCTR logical node, TVTR logical node, MMXN logical node, PHAR logical node, QDIC logical node, PDIS logical node, RREC logical node, PTRC logical node, XCBR logical node；The interaction flow of the information exchanging contents and each LN of finally formulating each LN sets up complete distance protection data model；4 logical node PDIS of instantiation, and two logical node PHAR of instantiation；
In step 2) in, definition reactance distance table logical node QFLT, and with multiple logical nodes, complete this function,
TCTR1 logical node gathers protective winding electric current; TVTR1 logical node is responsible for gathering busbar voltage; they all communicate information to MMXN1 logical node; by this logical node computation and measurement impedance; PDIS1 ~ PDIS4 provides protection enabling signal, impedance during by QFLT1 logical node according to fault, is calculated by look-up table; provide fault distance, complete fault localization function.
In step 1; TCTR logical node is responsible for gathering protective winding electric current; TVTR logical node is responsible for gathering busbar voltage, and MMXN logical node completes impedance computation, and PHAR logical node completes harmonic wave blocking function; QDIC logical node provides impedance operator definite value; for describing impedance characteristic, PDIS logical node realizes distance protection function, and RREC logical node realizes automatic reclosing function; PTRC completes trip protection logic, and XCBR chopper logical node realizes the tripping operation to chopper and combined floodgate.
Although the feature that IEC61850 standard is according to power system production process, adopt object modeling technique, formulate the service model meeting real time information and other transmission request messages, but, in attached wires of AC electrified railway, the feature of traction load and the feature of contact net determine the particularity of protection for feed line principle, determine the particularity of the modeling of feeder line IED device, make us can not indiscriminately imitate the IEC61850 standard logic nodal analysis method formulated completely, otherwise can cause that this necessary information having cannot embody in a model, without redundancy be present in a large number in model, affect the accurately rigorous of model and the efficiency of information transmission.
The present invention is based on the particularity of railway traction power supply system; strict with IEC61850 standard again; establish the model of feeder line distance protection and fault localization; comprise whole necessary data model information; cast out the data model unrelated with railway traction power supply system; meet attached wires of AC electrified railway protection for feed line particular/special requirement, expand the application of IEC61850 standard.
Accompanying drawing explanation
Fig. 1 railway traction power supply system feeder protection equipment distance protection impedance polygon.
The each example protection domain of Fig. 2 PDIS logical node.
Fig. 3 distance protection models.
Fig. 4 fault localization models.
Detailed description of the invention
One) distance protection modeling
1) distance protection logical node modeling
Impedance polygon and the typical power system of alternating current traction electric power system are inconsistent, for positive direction (opposite direction polygon is about origin symmetry), this polygon is described its shape by six definite values, as shown in Figure 1, wherein XsetValue is reactance limit setting valve, RsetValue is resistance limit setting valve, and φ 1 shoves for hiding deviation angle setting valve, and φ L is line impedance angle setting valve, X1 is reactance side-play amount setting valve, φ 2 is fixed angle, and value is 15 °, and latter four are defined as impedance operator value.
The modeling of distance protection logical node PDIS is as shown in table 1; because being traction power supply is monophase system; therefore 4 value data need to be set altogether; X1 represents the XsetValue in reactance setting valve and figure; RisGndRch represents the RsetValue in resistance setting valve and figure; DirMod represents the direction (positive direction, opposite direction) of distance protection, and OpDITmms represents the distance protection time limit.X1 and RisGndRch is the floating type value data object type of ASG, and DirMode and OpDITmms is the integer type value data object type of ING.It is specifically defined referring to IEC61850 standard.
Table 1PDIS logical node model
2) impedance operator logical node modeling
The distance protection of alternating current traction electric power system feeder line is generally divided into four sections, and each section of protection domain is different.Can adjust as positive direction or opposite direction for each section of four segment distance protections, although XsetValue and the RsetValue of each section is different, and operation time limit is also different, but impedance operator value is the same.IEC61850 does not have the special logical node describing this alternating current traction impedance operator, therefore according to the regulation " if not having the logical node class of standard to be applicable to function to be modeled; newname can be used to create a new logical node class " of IEC61850, an impedance operator logical node is set up.The title of this node follows the regulation of IEC61850.
Table 2QDIC names
The modeling of impedance operator logical node QDIC is as shown in table 3,4 definite values are set altogether, AngLod represents line impedance angle setting valve, AngLin represents the deviation angle setting valve that shoves of hiding, Xoffset represents reactance side-play amount setting valve, AngXoff represents reactance deviation angle setting valve, adds up according to operative practice for many years, generally takes 15 ° of fixed values.These four definite values are all the floating type value data object types of ASG, are specifically defined referring to IEC61850 standard.
Table 3QDIC logical node models
3) Function Decomposition and logical node instantiation
Distance protection is not completed by an independent LN, but realizes with multiple LN.According to Function Decomposition, need to adopt following multiple logical node jointly to complete feeder line distance protection function, TCTR logical node is responsible for gathering protective winding electric current, TVTR logical node is responsible for gathering busbar voltage, MMXN logical node completes impedance computation, PHAR logical node completes harmonic wave blocking function, QDIC logical node provides impedance operator definite value, for describing impedance characteristic, PDIS logical node realizes distance protection function, RREC logical node realizes automatic reclosing function, PTRC completes trip protection logic, XCBR chopper logical node realizes the tripping operation to chopper and combined floodgate.
According to the regulation " if a function is divided into some intervals, each interval should as logical node a separate instance " about logical node modeling of IEC61850 standard, establish example respective distances protection I ~ IV section respectively of four PDIS.Hide load-bearing capacity to improve distance protection simultaneously; must be provided with second harmonic locking and comprehensive harmonics restraint; size according to comprehensive harmonic content adjusts polygonal border automatically; thus constituting adaptive distance protection, it is therefore desirable to set up example corresponding second harmonic locking and the comprehensive harmonics restraint respectively of two PHAR.The logical node that distance protection modeling uses is in Table 4.
Table 4 distance protection modeling logic node table
4) distance protection modeling
After first three has walked, the information exchange of definition feeder line distance protection, complete final feeder line distance protection model, as shown in Figure 3.TCTR1 logical node gathers protective winding electric current, and TVTR1 logical node is responsible for gathering busbar voltage, and they all communicate information to MMXN1 logical node, by this logical node computation and measurement impedance.PHAR1 logical node completes second harmonic locking; PHAR2 logical node completes comprehensive harmonics restraint; QDIC1 logical node provides impedance operator definite value; the information of above four logical nodes is all transferred on PDIS1, four logical nodes of PDIS2, PDIS3 and PDIS4, they realize four segment distance defencive functions.The output according to PDIS logical node of the PTRC1 trip protection logical node, produces data Tr(trip signal) to XCBR1 logical node.RREC1 logical node realizes automatic reclosing function, it is judged that whether start automatic reclosing after XCBR1 trips.XCBR1 chopper logical node realizes the tripping operation to chopper and shutting-brake control according to the output of PTRC1 logical node and RREC1 logical node.
So far the main protection of feeder protection equipment and the data model of distance protection are completely established; this model is based entirely on the railway traction power supply system particular/special requirement to protection for feed line; provide four sections of adaptive distance protections with reclosing; and observe the regulation of IEC61850 standard; expand the application of IEC61850 so that IEC61850 standard may be directly applied to railway traction power supply system field.
Two) fault localization modeling
1) reactance distance table logical node definition
One feeder means is responsible for protection and the fault localization of a supply arm; although direct power traction can be equivalent to R-L power circuit in principle; but owing to there is interval and yard within the scope of supply arm; impedance and distance are not exclusively linear; it is thus desirable to supply arm is carried out segmentation; Traction networks situation in these segmentations is made to have concordance, it is possible to adopt uniform unit impedance computation.For the feature of railway traction net, define reactance distance table logical node QFLT.The name of this logical node is in Table 5.
Table 5QFLT names
Definition such as table 6 of reactance distance table logical node, mantissa subpackage contains: LocatMod represents distance representation, and the railway system is commonly used at present kilometer and two kinds of representations of kilometer post, depending on different road bureaus；SecNum represents segments；X0 represents starting point reactance；L0 represents starting point distance；X1 represents first paragraph reactance；L1 represents first paragraph distance；Xn represents N section reactance；Ln represents the n-th segment distance.Select the number of data object according to actual segments when logical node instantiation.
Table 6 logical node QFLT models
2) fault localization modeling
Fault localization model is as shown in Figure 4; this function is completed with multiple logical nodes; TCTR1 logical node gathers protective winding electric current, and TVTR1 logical node is responsible for gathering busbar voltage, and they all communicate information to MMXN1 logical node; by this logical node computation and measurement impedance; PDIS1 ~ PDIS4 provides protection enabling signal, impedance during by QFLT1 logical node according to fault, is calculated by look-up table; provide fault distance, complete fault localization function.
Claims (2)
1. the railway traction power supply system feeder protection equipment based on IEC61850, it is characterised in that: step is as follows,
1) define the data model of tractive power supply system distance protection LN and traction power supply impedance operator LN, establish the complicated distance protection model constituted with multiple functions based on this；
2) data model of definition tractive power supply system reactance distance table LN, establishes fault localization model based on this；
In step 1), first the feature according to the feature of railway traction power supply system feeder protection equipment main protection distance protection impedance polygon and carrying out step by step distance protection, sets up distance protection logical node PDIS and the data model of impedance operator logical node QDIC；Then the particular/special requirement according to distance protection; by its Function Decomposition; distinguish function and the communicating requirement of distance protection; complete function allocative decision; to need the Function Decomposition of data exchange in the LN of each correspondence, this model comprises TCTR logical node, TVTR logical node, MMXN logical node, PHAR logical node, QDIC logical node, PDIS logical node, RREC logical node, PTRC logical node, XCBR logical node；The interaction flow of the information exchanging contents and each LN of finally formulating each LN sets up complete distance protection data model；4 logical node PDIS of instantiation, and two logical node PHAR of instantiation；
In step 2) in, definition reactance distance table logical node QFLT, and with multiple logical nodes, complete this function,
TCTR1 logical node gathers protective winding electric current; TVTR1 logical node is responsible for gathering busbar voltage; they all communicate information to MMXN1 logical node; by this logical node computation and measurement impedance; PDIS1 ~ PDIS4 provides protection enabling signal, impedance during by QFLT1 logical node according to fault, is calculated by look-up table; provide fault distance, complete fault localization function.
2. a kind of railway traction power supply system feeder protection equipment based on IEC61850 according to claim 1, it is characterized in that: in step 1, TCTR logical node is responsible for gathering protective winding electric current, TVTR logical node is responsible for gathering busbar voltage, MMXN logical node completes impedance computation, PHAR logical node completes harmonic wave blocking function, QDIC logical node provides impedance operator definite value, for describing impedance characteristic, PDIS logical node realizes distance protection function, RREC logical node realizes automatic reclosing function, PTRC completes trip protection logic, XCBR chopper logical node realizes the tripping operation to chopper and combined floodgate.
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