CN103036216A - System and clock synchronization method applied to intelligentized converting station digitization busbar differential protection - Google Patents
System and clock synchronization method applied to intelligentized converting station digitization busbar differential protection Download PDFInfo
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- CN103036216A CN103036216A CN2012105249948A CN201210524994A CN103036216A CN 103036216 A CN103036216 A CN 103036216A CN 2012105249948 A CN2012105249948 A CN 2012105249948A CN 201210524994 A CN201210524994 A CN 201210524994A CN 103036216 A CN103036216 A CN 103036216A
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Abstract
The invention discloses a system applied to intelligentized converting station digitization busbar differential protection. The system comprises a busbar differential protection primary machine, a busbar differential protection secondary machine, a merging unit and an intelligent terminal. The busbar differential protection primary machine is used for logic computing on collected busbar protection data and achieving busbar extra duty protection. The busbar differential protection secondary machine is used for collecting analog quantity data and transmitting the analog quantity data to the busbar differential protection primary machine through optical fibers. The merging unit is used for converting received analog quantity of primary equipment into digital quantity through the merging unit and sending the digital quantity to the busbar differential protection primary machine. The intelligent terminal is used for receiving protection commands of the busbar differential protection primary machine and achieving a tripping function of a breaker by the intelligent terminal according to received commands. The busbar differential protection primary machine is respectively connected with the busbar differential protection secondary machine, the intelligent terminal and the merging unit through optical fibers. By means of the system applied to the intelligentized converting station digitization busbar differential protection, configuration and expansion are convenient, large volume data interaction and low power consumption can be achieved, each central processing unit (CPU) board of the whole machine can be high in synchronization precision, interpolation synchronization and various clock synchronization can be supported comprehensively, operation reliability of power grids is high, work efficiency is high, and investment is small.
Description
Technical field
The present invention relates to Intelligent transformer station renovation technique field, particularly be applied to digitlization bus differential protection system and clock method for synchronous in the Intelligent transformer station improvement project.
Background technology
Along with the further popularization of Intelligent transformer station construction and the extensive use of digital protection, the engineering application of digital protection in the Intelligent transformer station construction and in transforming is that intelligent substation is built one of emphasis.The digitlization bus protection is occupied extremely important status with importance and the particularity of its protection range and application conditions in the engineering of Intelligent transformer station is used.Because Intelligent transformer station adopts Optical Fiber Transmission digital information; greatly reduced transformer station's inner cable wiring work; shorten installation, debugging cycle, and can realize protective relaying device and secondary circuit on-line monitoring, provide the robust techniques guarantee for carrying out the relaying protection repair based on condition of component.
It is to be Intelligent transformer station by former Improvement of Conventional Transformer Substation that 330kV Yan'an becomes; arrangement according to the interruption maintenance plan; it is to finish in six stages that this intellectualized reconstruction is divided into; transformation for bus differential protection; the new intelligent equipment of equipment access of transforming if will have a power failure; the equipment of transforming can't access new intelligent equipment, and bus protection can't continue operation.Simultaneously, the digitlization bus differential protection also will face following problem in the Intelligent transformer station transformation process:
1, the female poor Large Volume Data access of digitlization problem;
2, female poor power consumption and problem of temperature rise of digitlization;
3, the female poor sample-synchronous problem of digitlization;
4, bus differential protection intellectualized reconstruction process optimization and testing authentication problem;
5, bus differential protection intellectualized reconstruction configuration file management problem.
Summary of the invention
Become the concrete condition of intellectualized reconstruction for 330kV Yan'an, the present invention proposes a kind of bus differential protection system that is applied to Intelligent transformer station, the mode that adopts main frame+handset to share is carried out intellectualized reconstruction, and bus does not lose the protection operation during guaranteeing to transform.
The objective of the invention is to realize by following technical proposals.
Be applied to the digitlization bus differential protection system of Intelligent transformer station, this system comprises:
The bus differential protection main frame is used for analog quantity or the digital data of the protection bus of bus differential protection handset collection are carried out logical calculated, and realizes bus overburden defencive function;
The bus differential protection handset is used for the collection of analog data, by optical fiber transmission to the bus differential protection host apparatus;
Merge cells is sent to the bus differential protection main frame for the analog quantity that will receive primary equipment by self being converted into digital quantity;
Intelligent terminal be used for receiving the guarded command of bus differential protection main frame, and the trip avoidance function of circuit breaker is finished self in the order that will receive;
Described bus differential protection main frame is connected with bus differential protection handset, intelligent terminal and merge cells by optical fiber respectively.
Further, in the system of the present invention:
Described bus differential protection handset is taked BP-2C-D bus differential protection handset.
Described intelligent terminal is taked the NSR351D intelligent terminal.
Described merge cells is taked the NS3261 merge cells.
Described bus differential protection main frame access 2-32 road intelligent terminal, merge cells and bus differential protection handset.
Correspondingly; the present invention gives the clock synchronizing method of digitlization bus differential protection system; method comprises: the one or more devices in bus differential protection main frame, bus differential protection handset, merge cells and the intelligent terminal respectively with the wall network switch to the time; each wall network switch respectively with the station level network switch to the time; simultaneously the station level network switch and master clock source to the time; completion system to the time, thereby realize whole system IEEE1588 to the time.
Further, in the method for the invention:
Described clock source comprises the master clock source that links to each other with the BD antenna with gps antenna and the standby clock source that links to each other that links to each other with the BD antenna with gps antenna, master clock source and standby clock source respectively by optical fiber B code and IEEE1588 expanding clock to the time, the IEEE1588 expanding clock respectively with stand layer network switch network switch to the time.
The message interaction process in described master clock source and standby clock source is:
1) master clock source sends the Sync message to all standby clock sources that link to each other, and produces simultaneously one based on the time stamp T of the local clock of master clock
M1, this time is the time that master clock sends the Sync message;
2) standby clock receives the Sync message and produces one based on the time stamp T of the local clock of standby clock
S1, this time is the time that standby clock receives the Sync message;
3) master clock is the transmitting time T of a upper Sync message
M1Join in the Follow_Up message and send to standby clock; Begin to send a Delay_Req message to master clock from clock, produce simultaneously one based on the time stamp T of the local clock of standby clock
S2, this time is the time that standby clock sends the Delay_Req message;
4) master clock receives the Delay_Req message, produces the time stamp T based on the local clock of master clock
M2, this time is the time that master clock receives the Delay_Req message;
5) master clock is T
M2Time puts in the Delay_Resp message and sends to standby clock, finishes a complete message interaction.
The present invention is compared with existing technology, and has following advantage:
1). the present invention is applicable to 1000kV and following electric pressure, comprise the various main wiring modes of single busbar connection, single mother partition, double-bus, the single segmentation of two mother, the two segmentations of two mother (realizing in the covering device) and 3/2 wiring, the main electrical scheme change can be finished by configuration.Maximum support main electrical scheme scale is 32 branch roads (circuit, element and interconnection switches);
2). unified Platform of hardware, realized standardization, the modularization of hardware, the configuration of software, convenient configuration and expansion;
3). based on gigabit LVDS bus architecture and Design and application treatment technology, realize the Data classification processing, realize that the Large Volume Data of protection equipment for busbar reaches low power dissipation design alternately;
4) bus during the .LVDS school, during the school of mainboard, each CPU board synchronization accuracy of complete machine can reach 0.1us during by the school;
5). support interpolation synchronously and the multiple clock method of synchronization (pulse per second (PPS), B code, IEEE 1588) comprehensively.
6). transformation process does not affect protection operational mode and the sharing of load at full station, and is applicable to various main wiring modes;
7). reduced the interruption duration of equipment during transforming, the equipment of being transformed only need have a power failure once, and bus differential protection is shorter disengaging time, and the operation of power networks reliability is high;
8). reduce difficulty of construction, increase work efficiency; Invest littlely, only need increase handset screen cabinet.
Successful Application first in the Intelligent transformer station improvement project of the present invention's 330kV electric pressure in state net system, successfully formulate scientific and rational power failure renovation technique scheme during on-the-spot the transformation, for the Intelligent transformer station improvement project of conventional substation has proposed a kind of safe and reliable thinking and scheme.
Description of drawings
Fig. 1 is system wiring schematic diagram of the present invention.
Fig. 2 is IEEE 1588 clock synchronous scheme schematic diagrames of the present invention.
Fig. 3 is master clock of the present invention and message interaction procedure chart from clock.
Embodiment
Below by embodiment and accompanying drawing the present invention is described in further details.
As shown in Figure 1, the present invention is applied to the digitlization bus differential protection system of Intelligent transformer station, and this system comprises: the bus differential protection main frame is used for protecting the analog quantity of bus or the data of digital data acquisition to carry out logical calculated, and realizes bus overburden defencive function; The bus differential protection handset is used for the collection of analog data, behind the electric current of CT, PT, voltage acquisition, by optical fiber transmission to the bus differential protection host apparatus; Intelligent terminal be used for receiving the order of bus differential protection host apparatus protection, and the trip avoidance function of circuit breaker is finished self in the order that will receive; Merge cells is used for received current, voltage, and the analog quantity that receives is sent to each protective device by self being converted into digital quantity; Above-mentioned bus differential protection main frame is connected with bus differential protection handset, intelligent terminal and merge cells by optical fiber respectively.The bus differential protection main frame can be accessed by analog quantity or the digital quantity that 2-32 routing intelligence terminal, merge cells and bus differential protection handset gather.
In the native system, the bus differential protection handset is taked BP-2C-D bus differential protection handset.The bus differential protection handset gathers multi-compartment AC sampling data by exchanging collection plate; AC sampling is carried out sending to SV communication interface plate after AD changes and is processed; SV communication interface plate merges synchronously the AC sampling data that receive; and send to the bus differential protection main frame according to the MU configuration file after with the packing of the AC sampling data of bus differential protection main frame needs, and by optical fiber interface and the optical fiber line of appointment the AC sampling value is sent to the bus differential protection main frame with IEC61850-9-2 stipulations message.
Bus differential protection handset of the present invention is as the important component part in the digitlization bus differential protection transformation process, mainly finish multi-compartment data acquisition process and with the information interaction of bus differential protection main frame.Its hardware consists of and comprises: the AC sampling plate, open entering plate, leave plate, SV communication interface plate, GOOSE interface board, power panel.Adopt multi-core CPU, the inner 1000M high speed LVDS bus that adopts.Classifying rationally plate function reasonably is assigned to each plate to amount of calculation, takes full advantage of the advantage of Distributed Calculation, realizes high-performance.Separate unit bus differential protection handset can realize reaching the AC sampling at 12 tunnel intervals and opening into leaving function.Support the synchronous time adjustment function of IEEE1588, do not relying under the external clock condition, cooperate with the bus differential protection main frame and finish the synchronous of AC sampling and device time adjustment function.
Its function is as follows:
1, finishes multi-compartment AC sampling and synchronous, by direct-connected optical fiber the AC sampling value is sent to the bus differential protection main frame with IEC61850-9-2 stipulations message.
2, gather the multi-compartment intake, and by direct-connected optical fiber intake is sent to the bus differential protection main frame with GOOSE stipulations message.
3, receive the multi-compartment amount of leaving that the bus differential protection main frame sends with GOOSE stipulations message by direct-connected optical fiber, and by relay outlet tripping operation.
In the native system, intelligent terminal is taked the NSR351D intelligent terminal.Intelligent terminal is the interface equipment between primary system and the electrical secondary system, and importance and protective device are equal to.Control and control box function that it has circuit breaker comprise the divide-shut brake loop, close rear supervision, the function such as reclosing, the supervision of operating power monitoring and controlling circuit breaking.The application of intelligent terminal has realized the digital interface of traditional switch.
In the native system, merge cells is taked the NS3261 merge cells.It has synchronizing function, multi-channel data acquisition processing capacity and communication function.Wherein synchronizing function comprises from outside (such as gps signal) and obtains unified high-precise synchronization clock source and send the synchronous acquisition order to multi-channel a/d converter; The multi-channel data acquisition processing capacity mainly is responsible for acceptance and the processing of electronic mutual inductor multiply digital signals, then transfers to the functional module of being responsible for information output and is sent to secondary device; Communication function is used for that each road sampled value data is carried out data encapsulation by certain form and sends to secondary device.
As shown in Figure 2, be the flow chart of the clock synchronizing method of digitlization bus differential protection system, method may further comprise the steps:
One or more devices in bus differential protection main frame, bus differential protection handset, merge cells and the intelligent terminal respectively with the wall network switch to the time; each wall network switch respectively with the station level network switch to the time; simultaneously the station level network switch and master clock source to the time; completion system to the time, thereby realize whole system IEEE1588 to the time.
As can be seen from the figure, the interlayer network switch has four in the present embodiment, be respectively the network switch 3, the network switch 4, the network switch 5 and the network switch 6, wherein, the network switch 3 connects respectively bus differential protection main frame, bus differential protection handset, merge cells (MU) and intelligent terminal; The network switch 4 connects bus differential protection main frame and merge cells (MU); The network switch 5 connects the bus differential protection main frame; The network switch 6 connects bus differential protection main frame, intelligent terminal and merge cells (MU); In these four interlayer network switchs, the network switch 3 and the network switch 4 layer network switch 1 of going to the station to meet somebody respectively, the network switch 5 and the network switch 6 layer network switch 2 of going to the station to meet somebody respectively, the layer network switch 1 of standing is connected with the IEEE1588 expanding clock by MP respectively with the layer network switch 2 of being connected again, the IEEE1588 expanding clock is connected with master clock source, standby clock source by optical fiber B code respectively, and master clock source, standby clock source receive respectively the signal of gps antenna and BD antenna.
As shown in Figure 3, master clock source with the message interaction process of standby clock is: at first master clock sends the Sync message to all standby clocks that link to each other, and produces simultaneously one based on the time stamp T of the local clock of master clock
M1, this time is the time that master clock sends the Sync message; Receive the Sync message and produce one based on the time stamp T of the local clock of standby clock from clock
S1, this time is the time that standby clock receives the Sync message; Master clock is the transmitting time T of a upper Sync message
M1Join in the Follow_Up message and send to standby clock; Standby clock begins to send a Delay_Req message to master clock, produces simultaneously one based on the time stamp T of the local clock of standby clock
S2, this time is the time that standby clock sends the Delay_Req message; Master clock receives the Delay_Req message, produces the time stamp T based on the local clock of master clock
M2, this time is the time that master clock receives the Delay_Req message; Master clock is T
M2Time puts in the Delay_Resp message and sends to standby clock, finishes a complete message interaction.
Its operation principle is as follows:
1, exchange acquisition function:
The bus differential protection handset gathers multi-compartment AC sampling data by exchanging collection plate; AC sampling is carried out sending to SV communication interface plate after AD changes and is processed; SV communication interface plate merges synchronously the AC sampling data that receive; and send to the bus differential protection main frame according to the MU configuration file after with the packing of the AC sampling data of bus differential protection main frame needs, and by optical fiber interface and the optical fiber line of appointment the AC sampling value is sent to the bus differential protection main frame with IEC61850-9-2 stipulations message.
2, gather open into leave tripping operation:
The bus differential protection handset is opened into data by opening entering plate collection multi-compartment; GOOSE communication interface plate is processed the intake that receives; and send to the bus differential protection main frame choose the intake data packing of bus differential protection main frame needs according to the GOOSE configuration file of device after, and by optical fiber interface and the optical fiber line of appointment the intake data are sent to the bus differential protection main frame with GOOSE stipulations message.
The bus differential protection handset receives the GOOSE message of bus differential protection main frame transmission by GOOSE communication interface plate simultaneously and carries out message and process; when set is tripped at corresponding interval in the GOOSE message; the GOOSE interface board will export order and send to exit plate, the exit relay outlet tripping operation that control is corresponding.
3, IEEE1588 synchronously to the time:
Bus differential protection main frame and handset form IEEE1588 to the time synchro system, main frame is as master clock, handset is as from clock, adopt point-to-point mode to be connected between main frame and the handset to finish the protection handset synchronously to the time.
Transformation process does not affect protection operational mode and the sharing of load at full station, and is applicable to various main wiring modes; Reduced the interruption duration of equipment during transforming, the equipment of being transformed only need have a power failure once, and bus differential protection is shorter disengaging time, and the operation of power networks reliability is high; Reduce difficulty of construction, increase work efficiency; Invest littlely, only need increase handset screen cabinet.
Above content is in conjunction with concrete preferred implementation further description made for the present invention; can not assert that the specific embodiment of the present invention only limits to this; for the general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; can also make some simple deduction or replace, all should be considered as belonging to the present invention and determine scope of patent protection by claims of submitting to.
Claims (8)
1. be applied to the digitlization bus differential protection system of Intelligent transformer station, it is characterized in that, this system comprises:
The bus differential protection main frame is used for analog quantity or the digital data of the protection bus of bus differential protection handset collection are carried out logical calculated, and realizes bus overburden defencive function;
The bus differential protection handset is used for the collection of analog data, by optical fiber transmission to the bus differential protection host apparatus;
Merge cells is sent to the bus differential protection main frame for the analog quantity that will receive primary equipment by self being converted into digital quantity;
Intelligent terminal be used for receiving the guarded command of bus differential protection main frame, and the trip avoidance function of circuit breaker is finished self in the order that will receive;
Described bus differential protection main frame is connected with bus differential protection handset, intelligent terminal and merge cells by optical fiber respectively.
2. the digitlization bus differential protection system that is applied to Intelligent transformer station according to claim 1 is characterized in that, described bus differential protection handset is taked BP-2C-D bus differential protection handset.
3. the digitlization bus differential protection system that is applied to Intelligent transformer station according to claim 1 is characterized in that, described intelligent terminal is taked the NSR351D intelligent terminal.
4. the digitlization bus differential protection system that is applied to Intelligent transformer station according to claim 1 is characterized in that, described merge cells is taked the NS3261 merge cells.
5. the digitlization bus differential protection system that is applied to Intelligent transformer station according to claim 1 is characterized in that, described bus differential protection main frame access 2-32 road intelligent terminal, merge cells and bus differential protection handset.
6. based on the clock synchronizing method of digitlization bus differential protection claimed in claim 1 system, it is characterized in that, may further comprise the steps:
One or more devices in bus differential protection main frame, bus differential protection handset, merge cells and the intelligent terminal respectively with the wall network switch to the time; each wall network switch respectively with the station level network switch to the time; simultaneously the station level network switch and master clock source to the time; completion system to the time, thereby realize whole system IEEE1588 to the time.
7. the clock synchronizing method of digitlization bus differential protection according to claim 6 system; it is characterized in that; described clock source comprises the master clock source that links to each other with the BD antenna with gps antenna and the standby clock source that links to each other that links to each other with the BD antenna with gps antenna; master clock source and standby clock source respectively by optical fiber B code and IEEE1588 expanding clock to the time, the IEEE1588 expanding clock respectively with stand layer network switch network switch to the time.
8. the clock synchronizing method of digitlization bus differential protection according to claim 7 system is characterized in that, the message interaction process in described master clock source and standby clock source is:
1) master clock source sends the Sync message to all standby clock sources that link to each other, and produces simultaneously one based on the time stamp T of the local clock of master clock
M1, this time is the time that master clock sends the Sync message;
2) standby clock receives the Sync message and produces one based on the time stamp T of the local clock of standby clock
S1, this time is the time that standby clock receives the Sync message;
3) master clock is the transmitting time T of a upper Sync message
M1Join in the Follow_Up message and send to standby clock; Standby clock begins to send a Delay_Req message to master clock, produces simultaneously one based on the time stamp T of the local clock of standby clock
S2, this time is the time that standby clock sends the Delay_Req message;
4) master clock receives the Delay_Req message, produces the time stamp T based on the local clock of master clock
M2, this time is the time that master clock receives the Delay_Req message;
5) master clock is T
M2Time puts in the Delay_Resp message and sends to standby clock, finishes a complete message interaction.
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| CN103746304A (en) * | 2013-12-25 | 2014-04-23 | 长园深瑞继保自动化有限公司 | Reconstruction method of intelligent transformer station |
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| CN106451353A (en) * | 2016-12-19 | 2017-02-22 | 北京交通大学 | Protection scheme for multiple transformers |
| CN106505534A (en) * | 2016-11-17 | 2017-03-15 | 云南电网有限责任公司电力科学研究院 | Multistage circuit longitudinal distance protection system and method |
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| CN112332388A (en) * | 2020-11-27 | 2021-02-05 | 中国南方电网有限责任公司 | Bus differential protection method based on optical fiber communication |
| CN112510660A (en) * | 2020-11-27 | 2021-03-16 | 中国南方电网有限责任公司 | Comprehensive measurement and control protection device with bus differential protection function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103746304A (en) * | 2013-12-25 | 2014-04-23 | 长园深瑞继保自动化有限公司 | Reconstruction method of intelligent transformer station |
| CN103746304B (en) * | 2013-12-25 | 2016-03-02 | 长园深瑞继保自动化有限公司 | The remodeling method of Intelligent transformer station |
| CN104065935A (en) * | 2014-06-27 | 2014-09-24 | 山东山大电力技术有限公司 | Automatic time synchronization system for transformer substation video monitoring mainframe and time synchronization method thereof |
| CN105119248A (en) * | 2015-10-08 | 2015-12-02 | 南京南瑞继保电气有限公司 | Centralized bus-bar protection extension access capability method and device |
| CN106505534A (en) * | 2016-11-17 | 2017-03-15 | 云南电网有限责任公司电力科学研究院 | Multistage circuit longitudinal distance protection system and method |
| CN106451353A (en) * | 2016-12-19 | 2017-02-22 | 北京交通大学 | Protection scheme for multiple transformers |
| CN108400574A (en) * | 2018-05-21 | 2018-08-14 | 南京南瑞继保电气有限公司 | A kind of dereliction formula bus protection implementation method on the spot |
| CN112332388A (en) * | 2020-11-27 | 2021-02-05 | 中国南方电网有限责任公司 | Bus differential protection method based on optical fiber communication |
| CN112510660A (en) * | 2020-11-27 | 2021-03-16 | 中国南方电网有限责任公司 | Comprehensive measurement and control protection device with bus differential protection function |
| CN112510660B (en) * | 2020-11-27 | 2024-05-31 | 中国南方电网有限责任公司 | Comprehensive measurement and control protection device with bus differential protection function |
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