CN105305602A - Standby power system of railway digital traction substation and automatic switching method of standby power system - Google Patents
Standby power system of railway digital traction substation and automatic switching method of standby power system Download PDFInfo
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- CN105305602A CN105305602A CN201510733289.2A CN201510733289A CN105305602A CN 105305602 A CN105305602 A CN 105305602A CN 201510733289 A CN201510733289 A CN 201510733289A CN 105305602 A CN105305602 A CN 105305602A
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Abstract
The invention discloses a standby power system of a railway digital traction substation and an automatic switching method of the standby power system. The standby power system of the railway digital traction substation includes a power supply network, the power supply network includes a 1# inlet wire and 2 # inlet wire, the 1# inlet wire includes a disconnecting switch 1QS, a breaker 1QF and a main transformer 1B which are sequentially connected in series, the 2# inlet wire includes a disconnecting switch 2QS, a breaker 2QF and a main transformer 2B which are sequentially connected in series, a connecting point between the disconnecting switch 1QS and the breaker 1QF is point A, a connecting point between the disconnecting switch 2QS and the breaker 2QF is point B, and the point A is connected with the point B through an overline disconnecting switch 3QS; and the standby power system also includes an automatic switching control system, the automatic switching control system includes a spare power automatic switching device, and the spare power automatic switching device is connected with a main transformer high voltage side intelligent component, a main transformer low voltage side alpha phase intelligent component and a main transformer low voltage side beta phase intelligent component through a GOOSE network.
Description
Technical field
The present invention relates to railway field of power supplies, be specifically related to the standby power system of electrified railway digital traction substation and haul oneself willingly into method.
Background technology
Digital transformer substation be with transformer station one secondary device for digitlization object, mainly contain two parts form: one is that intelligent primary equipment comprises electronic mutual inductor, intelligent switch etc.; Two is that secondary device also needs to carry out networking layering: several parts such as process layer, wall, station level, they are based on IEC61850 communication specification, information sharing and interoperability can be carried out between intelligent electric equipment in transformer station, be the fusion of the multiple technologies such as photoelectric technology, information technology, the network communications technology, there is the feature of modernization transformer station.Can say that Automation Technology of Digitized Transformer is state-of-the-art power automation technology in world today's electric power system, lead power technology developing direction, simultaneously along with the proposition of IEC61850 communication protocol, by intelligent terminal, digital protection measuring and controlling equipment, the digitized measurement instrument, fiber optic Ethernet and can completing of IEC61850 stipulations composition comprise information gathering, transmission, process, the whole digitized layered distribution type transformer station of output procedure is by extensive cognition, this Novel transformer substation station internal information all accomplishes digitlization, information transmission realizes networking, traffic model reaches standardization, make various equipment and the unified information platform of function sharing.Along with the application of railway digital traction substation, conventional automatic switching device of standby power supply can not meet digitlization integrated automatic system in traction substation demand, adopts the automatic switching device of standby power supply of network GOOSE mechanism imperative.
Summary of the invention
The object of the present invention is to provide the standby power system of electrified railway digital traction substation and haul oneself willingly into method; the present invention further expand on the basis of digital protection platform backup auto-activating device Digitized transformation application; by the communication mechanism of GOOSE Network Based, realize the automatic closing method of the electrified railway digital traction substation based on IEC61850.This realization of hauling oneself willingly into method is conducive to the design of traction substation, construction, debugging, maintenance, reduces project cost and simplifies engineering construction, further increasing the automatization level of traction substation, therefore have good application prospect.
The present invention for achieving the above object, realizes by the following technical solutions:
The standby power system of railway digital traction substation, comprise supply network, supply network comprises 1# inlet wire and 2# inlet wire, 1# inlet wire comprises the isolating switch 1QS, circuit breaker 1QF, the main transformer 1B that connect successively, the high-pressure side of main transformer 1B is connected with circuit breaker 1QF, the low-pressure side of main transformer 1B connects α phase circuit by circuit breaker 3QF, and the low-pressure side of main transformer 1B connects β phase circuit by circuit breaker 5QF, 2# inlet wire comprises the isolating switch 2QS, circuit breaker 2QF, the main transformer 2B that connect successively, the high-pressure side of main transformer 2B is connected with circuit breaker 2QF, the low-pressure side of main transformer 2B connects α phase circuit by circuit breaker 4QF, the low-pressure side of main transformer 2B connects β phase circuit by circuit breaker 6QF, tie point between isolating switch 1QS and circuit breaker 1QF is an A, tie point between isolating switch 2QS and circuit breaker 2QF is some B, puts A and is connected with some B by cross-line isolating switch 3QS, also comprise and haul oneself willingly into control system, described in haul oneself willingly into control system and comprise backup auto-activating device, backup auto-activating device is connected with main transformer high-pressure side intelligent assembly, main transformer low-pressure side α phase intelligent assembly, main transformer low-pressure side β phase intelligent assembly by GOOSE net, main transformer high-pressure side intelligent assembly comprises 1# high-pressure side intelligent assembly and 2# high-pressure side intelligent assembly, 1# high-pressure side intelligent assembly gathers the electric current and voltage of 1# high-side devices, and the cut-offfing of control 1# high-side devices, 1# high-side devices comprises isolating switch 1QS and circuit breaker 1QF, cross-line isolating switch 3QS, 2# high-pressure side intelligent assembly gathers the electric current and voltage of 2# high-side devices, and the cut-offfing of control 2# high-side devices, 2# high-side devices comprises isolating switch 2QS and circuit breaker 2QF, cross-line isolating switch 3QS, main transformer low-pressure side α phase intelligent assembly gathers cut-offfing of α phase low-pressure side equipment control α phase low-pressure side equipment, α phase low-pressure side equipment comprises circuit breaker 3QF and circuit breaker 4QF, main transformer low-pressure side β phase intelligent assembly gathers cut-offfing of β phase low-pressure side equipment control β phase low-pressure side equipment, β phase low-pressure side equipment comprises circuit breaker 5QF and circuit breaker 6QF, backup auto-activating device is connected with main transformer main protection equipment, main transformer backup protection device, main transformer body protective device by GOOSE net, and main transformer main protection equipment, as the main protection equipment of main transformer, realizes fast differential over current protection, biased differential protection, main transformer backup protection device, as the backup protection equipment of main transformer, realizes high-pressure side overcurrent protection, low-pressure side overcurrent protection, zero-sequencedirectional protection, low-pressure side overvoltage protection, overload protection, o-volt protection, main transformer body protective device, as the non-electricity protecting device of main transformer, realizes non-ionizing energy loss, described main transformer comprises main transformer 1B and main transformer 2B.
Design principle of the present invention is: the quantity of states such as the circuit breaker in the intelligent assembly acquisition interval of electric substation's main transformer interval primary equipment and isolating switch (switch, disconnecting link) are also sent to electric substation's process-level network with GOOSE message, the GOOSE action message that digitized backup auto-activating device sends from process-level network collection primary equipment information and other intelligent assembly, realizes traction substation stand-by power supply automatic switching.The method of this traction substation digitlization prepared auto restart; the hardwired communication mode of conventional backup auto-activating device is instead of by the transmission divide-shut brake order of GOOSE communication network and collection signal; eliminate in device to switch, large amount of complex control cables between protective device and backup auto-activating device, backup auto-activating device only needs an optical fiber to realize the connection with external smart assembly and other intelligent IED by process-level network.GOOSE is by the continuous self-inspection in communication process in addition, achieves the intelligent monitoring of secondary circuit between device, improves the reliability of control signal transmission.GOOSE(GenericObjectOrientedSubstationEvent) be the abbreviation of transformer station's general purpose event towards general object, it is a kind of rapid message transmission mechanism in IEC61850, for transmitting the important Real time signal in the middle of Substation IED.The present invention adopts the GOOSE message transmission mechanism in IEC61850 standard, and electric substation adopts and hands over mutually based on the communication network information of carrying out of IEC61850 standard, achieves the data between system equipment, information sharing; Set up unified communication standard and mathematical modeling, improve the autgmentability of system, achieve the interoperability of device.At the category of the application breakthrough conventional substation communication of digital transformer substation, the network communications technology is deep into during the multiple informations such as electric substation automation system protection, measurement, telemechanical apply.I.e. " substation network and communication protocol " IEC61850 standard, is that it was formulated in 2003 by technical committee of International Electrotechnical Commission the 57th (IECTC57) specially for the international standard of substation automation system communication system.It is by building information model, and the information communication in specification station, uses the technological means such as OO function services, is devoted to the interoperability realized between substation equipment.Compared to traditional communication protocol, IEC61850 mainly have employed following core technology: 1. Object-Oriented Model technology.IEC61850 adopts UML as the modeling language of its standard, and UML language definition is good, powerful, be easy to express, adaptable, and it can support OO design setting model, can support again to carry out designing and developing of software from demand analysis.2. software reuse technology.Incorporate a large amount of multiplex techniques in IEC61850 standard, greatly improve the total quality of IEC61850, conveniently safeguard in the future.3. Substation Configuration Language SCL.IEC61850 adopts SCL language to describe transformer substation system structure, communication system configuration, intelligent electronic device configuration and parameter etc., realizes between different IED configuration tools, system configuration utility compatible.4. towards the transformer substation case model GOOSE of general object.IEC61850 adopts GOOSE message mechanism, realizes the high-speed traffic between equipment.GOOSE message have employed publisher/subscriber's communication structure, is applicable to the high and communication system contained much information of requirement of real-time, and in actual applications, GOOSE is used for transmitting switch switching information.5. manufacture message specification MMS.MMS is the international standard message specification of data between equipment and information transmission, employs the concept of virtual unit VMD and mapping, also defines Abstract Common Service Interface ACSI in IEC61850 standard, and particular communication service maps the such concept of SCSM.In the use that MMS is concrete, first virtual unit is operated, then by the management of Mapping implementation to entity device.MMS is applied to the communication between station level and wall.
Compare traditional electric substation's automatic closing system, the control system of hauling oneself willingly into that traditional electric substation's automatic closing system adopts comprises 2 backup auto-activating devices, and these 2 backup auto-activating devices directly gather respectively and switch, the disconnecting link of control 1# route and 2# route, 2 backup auto-activating devices need to intercourse information simultaneously, thus the reaction rate of this mode of the object reaching collaborative work is slow, failure rate is high.And the present invention is based on digitlization traction substation, therefore on the basis of IEC61850 and GOOSE, remote digital can be realized control, therefore, only needing, a backup auto-activating device is set and carries out the intelligent assembly that logical operation controls outside, controlling each switch, disconnecting link respectively by controlling intelligent assembly, thus from the electrical source exchange of a whole automatic closing system of information Sources controlling, it is fast that the present invention possesses reaction speed, the features such as integrated level is high, failure rate is low.
The present invention adopts the GOOSE message transmission mechanism in IEC61850 standard; at the category of the application breakthrough conventional substation communication of digital transformer substation, the network communications technology is deep into during the multiple informations such as electric substation automation system protection, measurement, telemechanical apply.In this context, sampled data is as the pith of substation information, and its transmitting synchronous can realize in many ways.Wherein, have based on the algorithm of software and realize flexibly, without the advantage of hardware investment.The core of EC61850 can be summarized as: 1, carry out information modeling by definition common data model CDC, compliance logic node CPLN and compatible data Type C PDC.2, by definition Abstract Common Service Interface ACSI, communication service is described.3, map by definition particular communication service the mapping application that SCSM realizes concrete agreement.IEC61850 and traditional IEC60870-5-103 contrasts, and maximum feature is that it is not only a communication protocol, but also is a standard towards electric substation automation system object.The outstanding feature of digital transformer substation is embodied in the digitlization of facility information and transmission, particularly the deep application of ethernet communication technology, for the standardization of information, model and service provides possibility.IEC61850 has carried out concrete regulation to substation communication network and system just under this background.According to logical level, the information flow of IEC61850 to each layer of substation architecture system has carried out specification.
The stand-by power supply of the electrified railway digital traction substation of the present invention's design, mainly contain supply network, with the 1# main transformer main protection equipment controlling supply network, 2# main transformer main protection equipment, 1# main transformer backup protection device, 2# main transformer backup protection device, 1# main transformer body protective device, 2# main transformer body protective device, 1# main transformer high-pressure side intelligent assembly, 2# main transformer high-pressure side intelligent assembly, 1# main transformer low-pressure side a phase intelligent assembly, 2# main transformer low-pressure side a phase intelligent assembly and 1# main transformer low-pressure side b phase intelligent assembly, 2# main transformer low-pressure side b phase intelligent assembly, connected by GOOSE net (process-level network).
Main transformer low-pressure side α phase intelligent assembly comprises 1# main transformer low-pressure side α phase intelligent assembly and 2# main transformer low-pressure side α phase intelligent assembly, main transformer low-pressure side β phase intelligent assembly comprises 1# main transformer low-pressure side β phase intelligent assembly and 2# main transformer low-pressure side β phase intelligent assembly, 1# main transformer low-pressure side α phase intelligent assembly gathers the electric current and voltage of circuit breaker 3QF, and control cut-offfing of circuit breaker 3QF, 2# main transformer low-pressure side α phase intelligent assembly gathers the electric current and voltage of circuit breaker 4QF, and control cut-offfing of circuit breaker 4QF, 1# main transformer low-pressure side β phase intelligent assembly gathers the electric current and voltage of circuit breaker 5QF, and control cut-offfing of circuit breaker 5QF, 2# main transformer low-pressure side β phase intelligent assembly gathers the electric current and voltage of circuit breaker 6QF, and control cut-offfing of circuit breaker 6QF.
On 1# inlet wire, isolating switch 1QS, circuit breaker 1QF are positioned at the high-pressure side of main transformer 1B, circuit breaker 3QF, circuit breaker 5QF are positioned at the low-pressure side of main transformer 1B, on 2# inlet wire, isolating switch 2QS, circuit breaker 2QF are positioned at the high-pressure side of main transformer 2B, circuit breaker 4QF, circuit breaker 6QF are positioned at the low-pressure side of main transformer 2B, adopt cross-line isolating switch 3QS to open simultaneously and switch 1# inlet wire and 2# inlet wire, normal electric substation has powered four kinds of modes: 1# inlet wire+1# main transformer, 1# inlet wire+2# main transformer, 2# inlet wire+2# main transformer, 2# inlet wire+1# main transformer; Suppose that circuit breaker 1QF on 1# inlet wire is or/and circuit breaker 3QF is or/and circuit breaker 5QF breaks down, then backup auto-activating device control 1# main transformer high-pressure side intelligent assembly is or/and 2# main transformer high-pressure side intelligent assembly closes cross-line isolating switch 3QS, electric current is switched from No. 2 lines enter, form the inlet wire pattern of 1# inlet wire+2# main transformer; Suppose that circuit breaker 2QF on 2# inlet wire is or/and circuit breaker 4QF is or/and road device 6QF breaks down, then backup auto-activating device control 1# main transformer high-pressure side intelligent assembly is or/and 2# main transformer high-pressure side intelligent assembly closes cross-line isolating switch 3QS, electric current is switched from Line 1 enter, form the inlet wire pattern of 2# inlet wire+1# main transformer; Suppose that the main transformer 1B in 1# inlet wire breaks down, main transformer 2B is protected, then backup auto-activating device control 1# main transformer high-pressure side intelligent assembly is or/and 2# main transformer high-pressure side intelligent assembly closes cross-line isolating switch 3QS, electric current is switched from No. 2 lines enter, form the inlet wire pattern of 1# inlet wire+2# main transformer; Suppose that the main transformer 2B in 2# inlet wire breaks down; main transformer 2B is protected; then backup auto-activating device control 1# main transformer high-pressure side intelligent assembly is or/and 2# main transformer high-pressure side intelligent assembly closes cross-line isolating switch 3QS; electric current is switched from Line 1 enter, form the inlet wire pattern of 2# inlet wire+1# main transformer.
Described main transformer main protection equipment comprises 1# main transformer main protection equipment and 2# main transformer main protection equipment, 1# main transformer main protection equipment, main transformer backup protection device comprises 1# main transformer backup protection device and 2# main transformer backup protection device, main transformer body protective device comprises 1# main transformer body protective device and 2# main transformer body protective device, 1# main transformer main protection equipment, 1# main transformer backup protection device, 1# main transformer body protective device is all corresponding controls main transformer 1B, 2# main transformer main protection equipment, 2# main transformer backup protection device, 1# main transformer body protective device is all corresponding controls main transformer 2B.
Also comprise neutral point of main transformer isolating switch and become rail backflow isolating switch, main transformer high-pressure side intelligent assembly gathers the current/voltage of neutral point isolating switch, and control cut-offfing of neutral point isolating switch, main transformer low-pressure side α phase intelligent assembly, the collection of main transformer low-pressure side β phase intelligent assembly becomes the current/voltage of rail backflow isolating switch, and control to become cut-offfing of rail backflow isolating switch, neutral point of main transformer isolating switch comprises neutral point of main transformer isolating switch 7QS and neutral point of main transformer isolating switch 8QS, ground connection after neutral point of main transformer isolating switch 7QS is connected with the neutral point of main transformer 1B, ground connection after neutral point of main transformer isolating switch 8QS is connected with the neutral point of main transformer 2B, become rail backflow isolating switch to comprise change rail backflow isolating switch 9QS and become rail backflow isolating switch 10QS, ground connection after change rail backflow isolating switch 9QS and the change rail of main transformer 1B reflux and be a little connected, ground connection after change rail backflow isolating switch 10QS and the change rail of main transformer 2B reflux and be a little connected.
The stand-by power supply of described railway digital traction substation haul oneself willingly into method, comprise the steps:
S1: carry out supply power mode to electric substation and analyze, generates supply network;
S2: identify isolating switch and circuit breaker, transformer, α phase circuit and β phase circuit operational mode in supply network, and record the switch initial condition of all isolating switches and circuit breaker, by the voltage condition of the situation of isolating switch and circuit breaker, isolating switch and circuit breaker, thus judge that 1# inlet wire or 2# inlet wire are as putting into operation, otherwise for stopping transport;
S3: when electric substation breaks down, judgement is inlet wire fault trip or main transformer fault trip, if there is inlet wire fault trip, goes to step S4, if there is main transformer fault trip, goes to step S7;
S4: after inlet wire fault trip occurs in electric substation, judge that whether another inlet wire working power is normally charged, if another inlet wire working power is normal, then goes to step S5, if another inlet wire working power is with no pressure, then goes to step S6;
S5: if another inlet wire working power is normally charged, then there is fault inlet wire by backup auto-activating device excision, by controlling cut-offfing of cross-line isolating switch 3QS, make automatic switching on another inlet wire, make the fast quick-recovery normal power supply of electric substation, backup auto-activating device sends out actuating signal to backstage and scheduling simultaneously;
S6: if another inlet wire working power is also with no pressure, then have fault inlet wire by backup auto-activating device excision, switching is not on another inlet wire, and electric substation had a power failure entirely, and backup auto-activating device sends out actuating signal to backstage and scheduling simultaneously;
S7: after main transformer fault trip occurs in electric substation, judge that whether another main transformer is working properly.If another main transformer is working properly, then go to step S8, if another main transformer work is abnormal, then go to step S9;
S8: if another main transformer is working properly, then excise out of order main transformer by backup auto-activating device, by controlling cut-offfing of cross-line isolating switch 3QS, make automatic switching on another main transformer, make the fast quick-recovery normal power supply of electric substation, backup auto-activating device sends out actuating signal to backstage and scheduling simultaneously;
S9: if another main transformer work is abnormal, then excise out of order main transformer by backup auto-activating device, switching is not on another main transformer, and electric substation had a power failure entirely, and backup auto-activating device sends out actuating signal to backstage and scheduling simultaneously;
S10: backup auto-activating device automatic switching process terminates.
In step s 2, backup auto-activating device gathers the current/voltage of each isolating switch, circuit breaker by GOOSE network and intelligent assembly, and intelligent assembly comprises main transformer high-pressure side intelligent assembly, main transformer low-pressure side α phase intelligent assembly, main transformer low-pressure side β phase intelligent assembly.
In step s 2, backup auto-activating device gathers the protection act information of main transformer and the information of voltage of inlet wire by GOOSE network and main transformer main protection equipment, main transformer backup protection device, transformer body protective device.
In step S5, step S6, step S8, step S9, backup auto-activating device sends divide-shut brake order to intelligent assembly by GOOSE network, intelligent assembly controls corresponding controlled isolating switch, circuit breaker carries out breaking-closing operating, and intelligent assembly comprises main transformer high-pressure side intelligent assembly, main transformer low-pressure side α phase intelligent assembly, main transformer low-pressure side β phase intelligent assembly.
Beneficial effect of the present invention: a kind of automatic closing method that the invention discloses electrified railway digital traction substation, overcome conventional prepared auto restart cable complicated, cable extremely can not self-inspection, design, construction, debugging, the shortcomings such as troublesome maintenance, the prepared auto restart of GOOSE communication mechanism Network Based controls, the hardwired communication mode of conventional backup auto-activating device is instead of by the transmission divide-shut brake order of GOOSE communication network and collection signal, eliminate the interior device of institute to switch, large amount of complex control cables between protective device and backup auto-activating device, backup auto-activating device only needs an optical fiber to realize the connection with external smart assembly and other intelligent IED by process-level network.Intellectual monitoring when realizing network implementation, GOOSE, by the continuous monitoring GOOSE heartbeat message in communication process, once find that communication abnormality is reported immediately, achieves the intelligent monitoring of secondary circuit between device, improve the reliability of control signal transmission, reduce O&M difficulty.Realize running status intelligent adaptive, by GOOSE real-time packet, electric substation can Real time identification current operating conditions, hauls oneself willingly into mode according to running status intelligent selection, ensures adaptability and the correctness of hauling oneself willingly into function.This automatic closing method can ensure that normal power supply recovers rapidly to railway contact line in electric substation, continues as electric locomotive transmission of electric energy safely and reliably.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of supply network.
Fig. 2 is the structural representation hauling oneself willingly into control system.
Fig. 3 is the data flow schematic diagram hauling oneself willingly into control system.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment 1:
As shown in Figure 1 and Figure 2 and Figure 3:
The standby power system of railway digital traction substation, comprise supply network, supply network comprises 1# inlet wire and 2# inlet wire, 1# inlet wire comprises the isolating switch 1QS, circuit breaker 1QF, the main transformer 1B that connect successively, the high-pressure side of main transformer 1B is connected with circuit breaker 1QF, the low-pressure side of main transformer 1B connects α phase circuit by circuit breaker 3QF, and the low-pressure side of main transformer 1B connects β phase circuit by circuit breaker 5QF, 2# inlet wire comprises the isolating switch 2QS, circuit breaker 2QF, the main transformer 2B that connect successively, the high-pressure side of main transformer 2B is connected with circuit breaker 2QF, the low-pressure side of main transformer 2B connects α phase circuit by circuit breaker 4QF, the low-pressure side of main transformer 2B connects β phase circuit by circuit breaker 6QF, tie point between isolating switch 1QS and circuit breaker 1QF is an A, tie point between isolating switch 2QS and circuit breaker 2QF is some B, puts A and is connected with some B by cross-line isolating switch 3QS, also comprise and haul oneself willingly into control system, described in haul oneself willingly into control system and comprise backup auto-activating device, backup auto-activating device is connected with main transformer high-pressure side intelligent assembly, main transformer low-pressure side α phase intelligent assembly, main transformer low-pressure side β phase intelligent assembly by GOOSE net, main transformer high-pressure side intelligent assembly comprises 1# high-pressure side intelligent assembly and 2# high-pressure side intelligent assembly, 1# high-pressure side intelligent assembly gathers the electric current and voltage of 1# high-side devices, and the cut-offfing of control 1# high-side devices, 1# high-side devices comprises isolating switch 1QS and circuit breaker 1QF, cross-line isolating switch 3QS, 2# high-pressure side intelligent assembly gathers the electric current and voltage of 2# high-side devices, and the cut-offfing of control 2# high-side devices, 2# high-side devices comprises isolating switch 2QS and circuit breaker 2QF, cross-line isolating switch 3QS, main transformer low-pressure side α phase intelligent assembly gathers cut-offfing of α phase low-pressure side equipment control α phase low-pressure side equipment, α phase low-pressure side equipment comprises circuit breaker 3QF and circuit breaker 4QF, main transformer low-pressure side β phase intelligent assembly gathers cut-offfing of β phase low-pressure side equipment control β phase low-pressure side equipment, β phase low-pressure side equipment comprises circuit breaker 5QF and circuit breaker 6QF, backup auto-activating device is connected with main transformer main protection equipment, main transformer backup protection device, main transformer body protective device by GOOSE net, and main transformer main protection equipment, as the main protection equipment of main transformer, realizes fast differential over current protection, biased differential protection, main transformer backup protection device, as the backup protection equipment of main transformer, realizes high-pressure side overcurrent protection, low-pressure side overcurrent protection, zero-sequencedirectional protection, low-pressure side overvoltage protection, overload protection, o-volt protection, main transformer body protective device, as the non-electricity protecting device of main transformer, realizes non-ionizing energy loss, described main transformer comprises main transformer 1B and main transformer 2B.
Design principle of the present invention is: the quantity of states such as the circuit breaker in the intelligent assembly acquisition interval of electric substation's main transformer interval primary equipment and isolating switch (switch, disconnecting link) are also sent to electric substation's process-level network with GOOSE message, the GOOSE action message that digitized backup auto-activating device sends from process-level network collection primary equipment information and other intelligent assembly, realizes traction substation stand-by power supply automatic switching.The method of this traction substation digitlization prepared auto restart; the hardwired communication mode of conventional backup auto-activating device is instead of by the transmission divide-shut brake order of GOOSE communication network and collection signal; eliminate in device to switch, large amount of complex control cables between protective device and backup auto-activating device, backup auto-activating device only needs an optical fiber to realize the connection with external smart assembly and other intelligent IED by process-level network.GOOSE is by the continuous self-inspection in communication process in addition, achieves the intelligent monitoring of secondary circuit between device, improves the reliability of control signal transmission.GOOSE(GenericObjectOrientedSubstationEvent) be the abbreviation of transformer station's general purpose event towards general object, it is a kind of rapid message transmission mechanism in IEC61850, for transmitting the important Real time signal in the middle of Substation IED.
The stand-by power supply of the electrified railway digital traction substation of the present invention's design, mainly contain supply network, with the 1# main transformer main protection equipment controlling supply network, 2# main transformer main protection equipment, 1# main transformer backup protection device, 2# main transformer backup protection device, 1# main transformer body protective device, 2# main transformer body protective device, 1# main transformer high-pressure side intelligent assembly, 2# main transformer high-pressure side intelligent assembly, 1# main transformer low-pressure side a phase intelligent assembly, 2# main transformer low-pressure side a phase intelligent assembly and 1# main transformer low-pressure side b phase intelligent assembly, 2# main transformer low-pressure side b phase intelligent assembly, connected by GOOSE net (process-level network).
Main transformer low-pressure side α phase intelligent assembly comprises 1# main transformer low-pressure side α phase intelligent assembly and 2# main transformer low-pressure side α phase intelligent assembly, main transformer low-pressure side β phase intelligent assembly comprises 1# main transformer low-pressure side β phase intelligent assembly and 2# main transformer low-pressure side β phase intelligent assembly, 1# main transformer low-pressure side α phase intelligent assembly gathers the electric current and voltage of circuit breaker 3QF, and control cut-offfing of circuit breaker 3QF, 2# main transformer low-pressure side α phase intelligent assembly gathers the electric current and voltage of circuit breaker 4QF, and control cut-offfing of circuit breaker 4QF, 1# main transformer low-pressure side β phase intelligent assembly gathers the electric current and voltage of circuit breaker 5QF, and control cut-offfing of circuit breaker 5QF, 2# main transformer low-pressure side β phase intelligent assembly gathers the electric current and voltage of circuit breaker 6QF, and control cut-offfing of circuit breaker 6QF.
On 1# inlet wire, isolating switch 1QS, circuit breaker 1QF are positioned at the high-pressure side of main transformer 1B, circuit breaker 3QF, circuit breaker 5QF are positioned at the low-pressure side of main transformer 1B, on 2# inlet wire, isolating switch 2QS, circuit breaker 2QF are positioned at the high-pressure side of main transformer 2B, circuit breaker 4QF, circuit breaker 6QF are positioned at the low-pressure side of main transformer 2B, adopt cross-line isolating switch 3QS to open simultaneously and switch 1# inlet wire and 2# inlet wire, normal electric substation has powered four kinds of modes: 1# inlet wire+1# main transformer, 1# inlet wire+2# main transformer, 2# inlet wire+2# main transformer, 2# inlet wire+1# main transformer; Suppose that circuit breaker 1QF on 1# inlet wire is or/and circuit breaker 3QF is or/and circuit breaker 5QF breaks down, then backup auto-activating device control 1# main transformer high-pressure side intelligent assembly is or/and 2# main transformer high-pressure side intelligent assembly closes cross-line isolating switch 3QS, electric current is switched from No. 2 lines enter, form the inlet wire pattern of 1# inlet wire+2# main transformer; Suppose that circuit breaker 2QF on 2# inlet wire is or/and circuit breaker 4QF is or/and road device 6QF breaks down, then backup auto-activating device control 1# main transformer high-pressure side intelligent assembly is or/and 2# main transformer high-pressure side intelligent assembly closes cross-line isolating switch 3QS, electric current is switched from Line 1 enter, form the inlet wire pattern of 2# inlet wire+1# main transformer; Suppose that the main transformer 1B in 1# inlet wire breaks down, main transformer 2B is protected, then backup auto-activating device control 1# main transformer high-pressure side intelligent assembly is or/and 2# main transformer high-pressure side intelligent assembly closes cross-line isolating switch 3QS, electric current is switched from No. 2 lines enter, form the inlet wire pattern of 1# inlet wire+2# main transformer; Suppose that the main transformer 2B in 2# inlet wire breaks down; main transformer 2B is protected; then backup auto-activating device control 1# main transformer high-pressure side intelligent assembly is or/and 2# main transformer high-pressure side intelligent assembly closes cross-line isolating switch 3QS; electric current is switched from Line 1 enter, form the inlet wire pattern of 2# inlet wire+1# main transformer.
Described main transformer main protection equipment comprises 1# main transformer main protection equipment and 2# main transformer main protection equipment, 1# main transformer main protection equipment, main transformer backup protection device comprises 1# main transformer backup protection device and 2# main transformer backup protection device, main transformer body protective device comprises 1# main transformer body protective device and 2# main transformer body protective device, 1# main transformer main protection equipment, 1# main transformer backup protection device, 1# main transformer body protective device is all corresponding controls main transformer 1B, 2# main transformer main protection equipment, 2# main transformer backup protection device, 1# main transformer body protective device is all corresponding controls main transformer 2B.
Also comprise neutral point of main transformer isolating switch and become rail backflow isolating switch, main transformer high-pressure side intelligent assembly gathers the current/voltage of neutral point isolating switch, and control cut-offfing of neutral point isolating switch, main transformer low-pressure side α phase intelligent assembly, the collection of main transformer low-pressure side β phase intelligent assembly becomes the current/voltage of rail backflow isolating switch, and control to become cut-offfing of rail backflow isolating switch, neutral point of main transformer isolating switch comprises neutral point of main transformer isolating switch 7QS and neutral point of main transformer isolating switch 8QS, ground connection after neutral point of main transformer isolating switch 7QS is connected with the neutral point of main transformer 1B, ground connection after neutral point of main transformer isolating switch 8QS is connected with the neutral point of main transformer 2B, become rail backflow isolating switch to comprise change rail backflow isolating switch 9QS and become rail backflow isolating switch 10QS, ground connection after change rail backflow isolating switch 9QS and the change rail of main transformer 1B reflux and be a little connected, ground connection after change rail backflow isolating switch 10QS and the change rail of main transformer 2B reflux and be a little connected.
The stand-by power supply of described railway digital traction substation haul oneself willingly into method, comprise the steps:
S1: carry out supply power mode to electric substation and analyze, generates supply network;
S2: identify isolating switch and circuit breaker, transformer, α phase circuit and β phase circuit operational mode in supply network, and record the switch initial condition of all isolating switches and circuit breaker, by the voltage condition of the situation of isolating switch and circuit breaker, isolating switch and circuit breaker, thus judge that 1# inlet wire or 2# inlet wire are as putting into operation, otherwise for stopping transport;
S3: when electric substation breaks down, judgement is inlet wire fault trip or main transformer fault trip, if there is inlet wire fault trip, goes to step S4, if there is main transformer fault trip, goes to step S7;
S4: after inlet wire fault trip occurs in electric substation, judge that whether another inlet wire working power is normally charged, if another inlet wire working power is normal, then goes to step S5, if another inlet wire working power is with no pressure, then goes to step S6;
S5: if another inlet wire working power is normally charged, then there is fault inlet wire by backup auto-activating device excision, by controlling cut-offfing of cross-line isolating switch 3QS, make automatic switching on another inlet wire, make the fast quick-recovery normal power supply of electric substation, backup auto-activating device sends out actuating signal to backstage and scheduling simultaneously;
S6: if another inlet wire working power is also with no pressure, then have fault inlet wire by backup auto-activating device excision, switching is not on another inlet wire, and electric substation had a power failure entirely, and backup auto-activating device sends out actuating signal to backstage and scheduling simultaneously;
S7: after main transformer fault trip occurs in electric substation, judge that whether another main transformer is working properly.If another main transformer is working properly, then go to step S8, if another main transformer work is abnormal, then go to step S9;
S8: if another main transformer is working properly, then excise out of order main transformer by backup auto-activating device, by controlling cut-offfing of cross-line isolating switch 3QS, make automatic switching on another main transformer, make the fast quick-recovery normal power supply of electric substation, backup auto-activating device sends out actuating signal to backstage and scheduling simultaneously;
S9: if another main transformer work is abnormal, then excise out of order main transformer by backup auto-activating device, switching is not on another main transformer, and electric substation had a power failure entirely, and backup auto-activating device sends out actuating signal to backstage and scheduling simultaneously;
S10: backup auto-activating device automatic switching process terminates.
In step s 2, backup auto-activating device gathers the current/voltage of each isolating switch, circuit breaker by GOOSE network and intelligent assembly, and intelligent assembly comprises main transformer high-pressure side intelligent assembly, main transformer low-pressure side α phase intelligent assembly, main transformer low-pressure side β phase intelligent assembly.
In step s 2, backup auto-activating device gathers the protection act information of main transformer and the information of voltage of inlet wire by GOOSE network and main transformer main protection equipment, main transformer backup protection device, transformer body protective device.
In step S5, step S6, step S8, step S9, backup auto-activating device sends divide-shut brake order to intelligent assembly by GOOSE network, intelligent assembly controls corresponding controlled isolating switch, circuit breaker carries out breaking-closing operating, and intelligent assembly comprises main transformer high-pressure side intelligent assembly, main transformer low-pressure side α phase intelligent assembly, main transformer low-pressure side β phase intelligent assembly.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (8)
1. the standby power system of railway digital traction substation, it is characterized in that: comprise supply network, supply network comprises 1# inlet wire and 2# inlet wire, 1# inlet wire comprises the isolating switch 1QS, circuit breaker 1QF, the main transformer 1B that connect successively, the high-pressure side of main transformer 1B is connected with circuit breaker 1QF, the low-pressure side of main transformer 1B connects α phase circuit by circuit breaker 3QF, and the low-pressure side of main transformer 1B connects β phase circuit by circuit breaker 5QF, 2# inlet wire comprises the isolating switch 2QS, circuit breaker 2QF, the main transformer 2B that connect successively, the high-pressure side of main transformer 2B is connected with circuit breaker 2QF, the low-pressure side of main transformer 2B connects α phase circuit by circuit breaker 4QF, the low-pressure side of main transformer 2B connects β phase circuit by circuit breaker 6QF, tie point between isolating switch 1QS and circuit breaker 1QF is an A, tie point between isolating switch 2QS and circuit breaker 2QF is some B, puts A and is connected with some B by cross-line isolating switch 3QS, also comprise and haul oneself willingly into control system, described in haul oneself willingly into control system and comprise backup auto-activating device, backup auto-activating device is connected with main transformer high-pressure side intelligent assembly, main transformer low-pressure side α phase intelligent assembly, main transformer low-pressure side β phase intelligent assembly by GOOSE net, main transformer high-pressure side intelligent assembly comprises 1# high-pressure side intelligent assembly and 2# high-pressure side intelligent assembly, 1# high-pressure side intelligent assembly gathers the electric current and voltage of 1# high-side devices, and the cut-offfing of control 1# high-side devices, 1# high-side devices comprises isolating switch 1QS and circuit breaker 1QF, cross-line isolating switch 3QS, 2# high-pressure side intelligent assembly gathers the electric current and voltage of 2# high-side devices, and the cut-offfing of control 2# high-side devices, 2# high-side devices comprises isolating switch 2QS and circuit breaker 2QF, cross-line isolating switch 3QS, main transformer low-pressure side α phase intelligent assembly gathers cut-offfing of α phase low-pressure side equipment control α phase low-pressure side equipment, α phase low-pressure side equipment comprises circuit breaker 3QF and circuit breaker 4QF, main transformer low-pressure side β phase intelligent assembly gathers cut-offfing of β phase low-pressure side equipment control β phase low-pressure side equipment, β phase low-pressure side equipment comprises circuit breaker 5QF and circuit breaker 6QF, backup auto-activating device is connected with main transformer main protection equipment, main transformer backup protection device, main transformer body protective device by GOOSE net, and main transformer main protection equipment, as the main protection equipment of main transformer, realizes fast differential over current protection, biased differential protection, main transformer backup protection device, as the backup protection equipment of main transformer, realizes high-pressure side overcurrent protection, low-pressure side overcurrent protection, zero-sequencedirectional protection, low-pressure side overvoltage protection, overload protection, o-volt protection, main transformer body protective device, as the non-electricity protecting device of main transformer, realizes non-ionizing energy loss, described main transformer comprises main transformer 1B and main transformer 2B.
2. the standby power system of railway digital traction substation according to claim 1, it is characterized in that: main transformer low-pressure side α phase intelligent assembly comprises 1# main transformer low-pressure side α phase intelligent assembly and 2# main transformer low-pressure side α phase intelligent assembly, main transformer low-pressure side β phase intelligent assembly comprises 1# main transformer low-pressure side β phase intelligent assembly and 2# main transformer low-pressure side β phase intelligent assembly, 1# main transformer low-pressure side α phase intelligent assembly gathers the electric current and voltage of circuit breaker 3QF, and control cut-offfing of circuit breaker 3QF, 2# main transformer low-pressure side α phase intelligent assembly gathers the electric current and voltage of circuit breaker 4QF, and control cut-offfing of circuit breaker 4QF, 1# main transformer low-pressure side β phase intelligent assembly gathers the electric current and voltage of circuit breaker 5QF, and control cut-offfing of circuit breaker 5QF, 2# main transformer low-pressure side β phase intelligent assembly gathers the electric current and voltage of circuit breaker 6QF, and control cut-offfing of circuit breaker 6QF.
3. the standby power system of railway digital traction substation according to claim 1, it is characterized in that: described main transformer main protection equipment comprises 1# main transformer main protection equipment and 2# main transformer main protection equipment, 1# main transformer main protection equipment, main transformer backup protection device comprises 1# main transformer backup protection device and 2# main transformer backup protection device, main transformer body protective device comprises 1# main transformer body protective device and 2# main transformer body protective device, 1# main transformer main protection equipment, 1# main transformer backup protection device, 1# main transformer body protective device is all corresponding controls main transformer 1B, 2# main transformer main protection equipment, 2# main transformer backup protection device, 1# main transformer body protective device is all corresponding controls main transformer 2B.
4. according to the standby power system of the railway digital traction substation in claim 1-3 described in any one, it is characterized in that: also comprise neutral point of main transformer isolating switch and become rail backflow isolating switch, main transformer high-pressure side intelligent assembly gathers the current/voltage of neutral point isolating switch, and control cut-offfing of neutral point isolating switch, main transformer low-pressure side α phase intelligent assembly, the collection of main transformer low-pressure side β phase intelligent assembly becomes the current/voltage of rail backflow isolating switch, and control to become cut-offfing of rail backflow isolating switch, neutral point of main transformer isolating switch comprises neutral point of main transformer isolating switch 7QS and neutral point of main transformer isolating switch 8QS, ground connection after neutral point of main transformer isolating switch 7QS is connected with the neutral point of main transformer 1B, ground connection after neutral point of main transformer isolating switch 8QS is connected with the neutral point of main transformer 2B, become rail backflow isolating switch to comprise change rail backflow isolating switch 9QS and become rail backflow isolating switch 10QS, ground connection after change rail backflow isolating switch 9QS and the change rail of main transformer 1B reflux and be a little connected, ground connection after change rail backflow isolating switch 10QS and the change rail of main transformer 2B reflux and be a little connected.
5. based on the railway digital traction substation in claim 1-4 described in any one standby power system haul oneself willingly into method, it is characterized in that, comprise the steps:
S1: carry out supply power mode to electric substation and analyze, generates supply network;
S2: identify isolating switch and circuit breaker, transformer, α phase circuit and β phase circuit operational mode in supply network, and record the switch initial condition of all isolating switches and circuit breaker, by the voltage condition of the situation of isolating switch and circuit breaker, isolating switch and circuit breaker, thus judge that 1# inlet wire or 2# inlet wire are as putting into operation, otherwise for stopping transport;
S3: when electric substation breaks down, judgement is inlet wire fault trip or main transformer fault trip, if there is inlet wire fault trip, goes to step S4, if there is main transformer fault trip, goes to step S7;
S4: after inlet wire fault trip occurs in electric substation, judge that whether another inlet wire working power is normally charged, if another inlet wire working power is normal, then goes to step S5, if another inlet wire working power is with no pressure, then goes to step S6;
S5: if another inlet wire working power is normally charged, then there is fault inlet wire by backup auto-activating device excision, by controlling cut-offfing of cross-line isolating switch 3QS, make automatic switching on another inlet wire, make the fast quick-recovery normal power supply of electric substation, backup auto-activating device sends out actuating signal to backstage and scheduling simultaneously;
S6: if another inlet wire working power is also with no pressure, then have fault inlet wire by backup auto-activating device excision, switching is not on another inlet wire, and electric substation had a power failure entirely, and backup auto-activating device sends out actuating signal to backstage and scheduling simultaneously;
S7: after main transformer fault trip occurs in electric substation, judge that whether another main transformer is working properly,
If another main transformer is working properly, then go to step S8, if another main transformer work is abnormal, then go to step S9;
S8: if another main transformer is working properly, then excise out of order main transformer by backup auto-activating device, by controlling cut-offfing of cross-line isolating switch 3QS, make automatic switching on another main transformer, make the fast quick-recovery normal power supply of electric substation, backup auto-activating device sends out actuating signal to backstage and scheduling simultaneously;
S9: if another main transformer work is abnormal, then excise out of order main transformer by backup auto-activating device, switching is not on another main transformer, and electric substation had a power failure entirely, and backup auto-activating device sends out actuating signal to backstage and scheduling simultaneously;
S10: backup auto-activating device automatic switching process terminates.
6. according to claim 5ly haul oneself willingly into method, it is characterized in that: in step s 2, backup auto-activating device gathers the current/voltage of each isolating switch, circuit breaker by GOOSE network and intelligent assembly, and intelligent assembly comprises main transformer high-pressure side intelligent assembly, main transformer low-pressure side α phase intelligent assembly, main transformer low-pressure side β phase intelligent assembly.
7. according to claim 5ly haul oneself willingly into method; it is characterized in that: in step s 2, backup auto-activating device gathers the protection act information of main transformer and the information of voltage of inlet wire by GOOSE network and main transformer main protection equipment, main transformer backup protection device, transformer body protective device.
8. according to claim 5ly haul oneself willingly into method, it is characterized in that: in step S5, step S6, step S8, step S9, backup auto-activating device sends divide-shut brake order to intelligent assembly by GOOSE network, intelligent assembly controls corresponding controlled isolating switch, circuit breaker carries out breaking-closing operating, and intelligent assembly comprises main transformer high-pressure side intelligent assembly, main transformer low-pressure side α phase intelligent assembly, main transformer low-pressure side β phase intelligent assembly.
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| CN109888657A (en) * | 2019-03-14 | 2019-06-14 | 北海银河开关设备有限公司 | Rail traction gets higher voltage switching station |
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