CN103560493A - System and method for protecting medium-low-voltage side busbar quick-action in intelligent substation - Google Patents
System and method for protecting medium-low-voltage side busbar quick-action in intelligent substation Download PDFInfo
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Abstract
The invention discloses a system and method for protecting medium-low-voltage side busbar quick-action in an intelligent substation. The system comprises a distribution type sampling interface and processing module, a self-adaptation remote signaling data acquisition module, a busbar quick-action protection module based on distributed failure recognition, a station level MMS service and interface module and a self-adaptation outlet control module, wherein the busbar quick-action protection module can analyze and judge the failure areas and the failure types in a self-adaptation mode to achieve the purpose of fast eliminating the medium-low-voltage side busbar failures in the substation according to the decentralized failure predication conditions and the combinatorial logics, the station level MMS service and interface module has the control function of uploading various information and fast eliminating the busbar failures. The system and method can be used in the intelligent substation, fast protection for various failures inside and outside the medium-low-voltage side busbar areas independently, and the medium-low-voltage side busbar failures in the substation can be fast and reliably eliminated, equipment trouble accidents are reduced, the failure influence range is narrowed, the medium-low-voltage fast protection configuration in the substation is improved, and the reliability of operation of a system in the substation is effectively improved.
Description
Technical field
The present invention relates to a kind of intelligent substation mesolow side bus instant protection system and method thereof, belong to intelligent substation of electric power system technical field.
Background technology
At present for general 110kV and following one-end substation; main transformer high pressure inlet wire, 35kV, 10kV outgoing line part are equipped with independently protection; therefore for the protection of part, 35kV, the configuration of 10kV outgoing line part beyond main transformer high-pressure side, move definite value generally between 0.5 ~ 1.2 second; the action definite value of this part can meet outside failure removal requirement substantially; and after failure removal or disappearance, primary equipment all can recover normal operation.
But it is interior because outgoing line interval is many to stand, extend to each interval, still relatively length and link are more for the total length of middle voltage bus bar, because insulation breakdown, partial discharge, insulator are crossed the reasons such as heat ageing, the probability breaking down still exists, and the risk that particularly middle voltage bus bar of operation breaks down is for many years larger.Once busbar short-circuit fault occurs, fault current is up to more than 8000A, and the electromagnetic stress producing during fault and the overheated series of problems causing, damage serious to bus and switch cubicle equipment.
Conventional solution for downside busbar fault in main transformer is to utilize corresponding backup protection action excision; but backup protection is by matching principle setting step by step; general definite value is between 0.8 ~ 2.0 second; the fault actions time of this protection is long; though can excise fault; the loss that the failure problems such as bus gross distortion, equipment burnout, insulation breakdown or the decline that large electric current causes or protection CT cause is often difficult to retrieve; even may cause switch cubicle equipment cannot continue to use, the time of restore electricity reliable time cycle and power failure is all larger.
For main transformer switch dead-zone fault or segmentation dead-zone fault, may not have fault current to pass through low-pressure side CT, low standby is difficult to fault current be detected and starts action, makes fault be difficult to excision, the fault current action excision that now only reliable high backup protection detects; And high standby is designed to the backup protection of low backup protection, the time of excision dead-zone fault is longer, is generally 1.5 ~ 2 seconds.In such cases, even if fault is cut, the fault causing or to leave more defect hidden danger more, before restoring electricity, must carefully complete every test, otherwise can have larger operation risk.
Therefore; need to design a kind of intelligent substation mesolow side bus instant protection system; all kinds of busbar fault types such as low switch dead-zone fault, block switch dead-zone fault in common busbar fault, main transformer in Intelligent Recognition station; realize the excision of action tripping operation quickly and accurately fault, ensure the safe and stable operation of primary equipment in station.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of intelligent substation mesolow side bus instant protection system and method thereof; improve mesolow in intelligent substation and protect fast configuration; realize the fast and reliable excision of mesolow side bus fault in intelligent substation; reduce device damage and fault incidence, improve transformer substation system reliability of operation.
For achieving the above object, the present invention takes following technical scheme to realize:
A mesolow side bus instant protection system, comprises
Distributed sample interface and processing module: the optical fiber interface that possesses the digital SV sampled value output that can directly receive the interface of conventional simulation amount signal and receive merge cells device, the distributed synchronous input collection that completes each side protection electric current and voltage data of main transformer, and the function of transformer station's each outlet line load of mesolow side;
Self adaptation remote signalling data acquisition module: the GOOSE signal of the protection startup by the low-pressure line-outgoing interval/capacitor standoff/section gap in twisted-pair Ethernet and special optic fibre GOOSE Wang，Dui transformer station and main transformer mesolow side switch gap, trip protection, plant failure receives and processes;
Bus instant protection module based on distributed fault identification: according to information such as the protection information about power of prime distributed capture, the startup of low-pressure line-outgoing/capacitor/sectionalised protection, plant failure and the position of the switch, according to corresponding decentralized fault Rule of judgment and other conditional combination logic, adaptive analysis fault, whether comprehensive failure judgement region is the type of middle voltage bus bar troubles inside the sample space and fault, and carry out corresponding busbar fault protection logic, realize the quick excision of transformer station's mesolow side bus fault;
Station level MMS service and interface module thereof: provide the MMS based on IEC 61850 to serve, realize telemetered signal, remote signals, protection enabling signal, busbar fault signal, protect action outlet signal to the information upload service of stand interior backstage and supervisory control system;
Self adaptation control of export module: provide based on ordinary tap amount output with based on the outputing of IEC 61850GOOSE service, and support to mix application, realize the protection action tripping operation outlet function under types of applications occasion.
The output of described distributed sample interface and processing module and self adaptation remote signalling data acquisition module is all connected with the input of bus instant protection module, and the output of described bus instant protection module connects respectively the input of self adaptation control of export module and station level MMS service and interface module thereof.
Aforesaid a kind of intelligent substation mesolow side bus instant protection system; it is characterized in that: described distributed sample interface and processing module; possesses conventional simulation amount signal and digital Optical fibre sampling interface; according to scene application needs; the electric current and voltage amount that receiving equipment is required, the synchronous input collection that completes each side protection data of main transformer is resolved or each outlet line load acquisition function of transformer station's mesolow side.
Aforesaid a kind of intelligent substation mesolow side bus instant protection system; it is characterized in that: described remote signalling data acquisition module; comprise Ethernet acquisition module; directly access station control layer network switch, gathers protection startup, trip protection, plant failure, switch position signal that busbar fault is analyzed required low-pressure line-outgoing/capacitor/section gap.
Aforesaid a kind of intelligent substation mesolow side bus instant protection system; it is characterized in that: described remote signalling data acquisition module; comprise optical fiber GOOSE acquisition module; the direct access procedure layer GOOSE network switch, the collection main transformer mesolow side position of the switch, main transformer backup protection start/protect actuating signal.
Aforesaid a kind of intelligent substation mesolow side bus instant protection system; it is characterized in that: the described bus instant protection module based on distributed fault identification; comprise internal fault external fault analysis module: the protection information about power gathering according to prime and low-pressure line-outgoing interval/capacitor standoff/section gap protection starts and plant failure information; according to corresponding decentralized fault Rule of judgment and combinational logic, whether analysis judgment system fault is the troubles inside the sample space on main transformer mesolow side bus.
Aforesaid a kind of intelligent substation mesolow side bus instant protection system, it is characterized in that: the described bus instant protection module based on distributed fault identification, comprise logic discrimination and protection control module: when fault is bus external area error, the electric discharge of bus instant protection logic function latch-up protection outlet; When fault is bus troubles inside the sample space; according to protection startup, the actuating signal of low pressure segmentation; low-pressure line-outgoing/capacitor enabling signal; the combinational logic of minute co-bit signal of low standby current protection enabling signal and block switch, downside main transformer switch; judgement differentiation fault type is busbar fault, the malfunctioning dead-zone fault of segmentation or is the malfunctioning dead-zone fault of low side switch; and carry out corresponding protection, excise fast corresponding failure node, low side bus instant protection function in realization.
Aforesaid a kind of intelligent substation mesolow side bus instant protection system; it is characterized in that: described station level MMS service and interface module thereof; provide the MMS based on IEC 61850 to serve, realize telemetered signal, remote signals, protection enabling signal, busbar fault signal, protect action outlet signal to the information upload service of stand interior backstage and supervisory control system.
Aforesaid a kind of intelligent substation mesolow side bus instant protection system; it is characterized in that: described self adaptation control of export module; switching value output or outputing based on fiber optic Ethernet GOOSE service based on conventional relay are provided; realize the tripping operation control of export function of protection action based on different mode, meet the application demand under all kinds of scenes.
A mesolow side bus instant protection method, its method step comprises as follows:
(1) distributed sample interface and treatment step; By receiving the interface of conventional simulation amount signal and receiving the optical fiber interface of the digital SV sampled value signal that merge cells device sends, distributedly complete the synchronous input collection of each side protection electric current and voltage data of main transformer and the collection of transformer station's each outlet line load of mesolow side;
(2) self adaptation remote signalling data acquisition step; The GOOSE signal of the protection startup by low-pressure line-outgoing interval, capacitor standoff, section gap and main transformer mesolow side switch gap in ethernet network and special-purpose GOOSE network ，Dui transformer station, trip protection, plant failure receives and processes;
(3) the bus instant protection step based on distributed fault identification; According to the information of step (1) and step (2) collection, according to corresponding decentralized fault Rule of judgment and combinational logic, adaptive analysis fault, whether comprehensive failure judgement region is the type of middle voltage bus bar troubles inside the sample space and fault, and carry out corresponding busbar fault protection logic, realize the quick excision of transformer station's mesolow side bus fault;
(4) signal is uploaded step; MMS based on IEC 61850 service, by station level MMS serve and the telemetered signal of interface module performing step (3), remote signals, protection enabling signal, busbar fault signal, protection action outlet signal to the information upload service of backstage in station and supervisory control system;
(5) self adaptation control of export step; According to the output information of step (3), by outputing of exporting and serve based on IEC 61850 GOOSE based on ordinary tap amount, the control to the protection action tripping operation outlet under types of applications scene.
The invention has the beneficial effects as follows: the invention provides a kind of intelligent substation mesolow side bus instant protection system; can be used for the quick excision of downside busbar fault in bus in intelligent substation; realize the independently quick protection of the inside and outside all kinds of faults in mesolow side bus district; that the useful of downside backup protection in transformer station supplemented; device damage accident and fault incidence have been reduced; perfect in transformer station mesolow protect fast configuration, effectively improved transformer substation system reliability of operation.The present invention be in current intelligent substation during downside busbar fault fault clearing time long, the problem that seriously jeopardizes equipment security of operation and personal safety provides a kind of convenient effective solution.
Accompanying drawing explanation
Fig. 1 is the functional module structure figure of intelligent substation mesolow side bus instant protection system of the present invention.
Embodiment
For technical scheme, technical characterictic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with embodiment, further set forth the present invention.
Fig. 1 is the functional module structure figure of intelligent substation mesolow side bus instant protection system of the present invention.This intelligent substation mesolow side bus instant protection system, comprising:
Distributed sample interface and processing module: by conventional simulation amount interface and digital Optical fibre sampling interface, according to scene application needs, the electric current and voltage amount that receiving equipment is required, the synchronous input collection that completes each side protection data of main transformer is resolved or each outlet line load acquisition function of transformer station's mesolow side;
Self adaptation remote signalling data acquisition module: the GOOSE signal of the protection startup by the low-pressure line-outgoing interval/capacitor standoff/section gap in twisted-pair Ethernet and special optic fibre GOOSE Wang，Dui transformer station and main transformer mesolow side switch gap, trip protection, plant failure receives and processes;
Bus internal fault external fault analysis module: the protection information about power gathering according to prime and low-pressure line-outgoing interval/capacitor standoff/section gap protection starts and plant failure information, according to corresponding decentralized fault Rule of judgment and combinational logic, whether analysis judgment system fault is the troubles inside the sample space on main transformer mesolow side bus;
Busbar fault logic discrimination and protection control module: when fault is bus external area error, the electric discharge of bus instant protection logic function latch-up protection outlet; When fault is bus troubles inside the sample space, according to protection startup, the actuating signal of low pressure segmentation, low-pressure line-outgoing/capacitor enabling signal, the combinational logic of minute co-bit signal of low standby current protection enabling signal and block switch, downside main transformer switch, judgement differentiation fault type is busbar fault, the malfunctioning dead-zone fault of segmentation or is the malfunctioning dead-zone fault of low side switch, and carry out corresponding protection, excise fast corresponding failure node, low side bus instant protection function in realization;
Station level MMS service and interface module thereof: provide the MMS based on IEC 61850 to serve, realize telemetered signal, remote signals, protection enabling signal, busbar fault signal, protect action outlet signal to the information upload service of stand interior backstage and supervisory control system;
Self adaptation control of export module: output service by switching value output or the GOOSE based on fiber optic Ethernet based on conventional relay, realize the tripping operation control of export function of protection action based on different mode, meet the application demand under all kinds of scenes.
The output of above-mentioned distributed sample interface and processing module and self adaptation remote signalling data acquisition module is all connected with the input of bus instant protection module, and the output of described bus instant protection module connects respectively the input of self adaptation control of export module and station level MMS service and interface module thereof.
In the present embodiment, this self adaptation remote signalling data acquisition module comprises Ethernet acquisition module and optical fiber GOOSE acquisition module; By optical fiber GOOSE acquisition module, the direct access procedure layer GOOSE network switch, the collection main transformer mesolow side position of the switch, main transformer backup protection start/protect actuating signal.And the direct access station control of Ethernet acquisition module layer network switch, gather protection startup, trip protection, plant failure, switch position signal that busbar fault is analyzed required low-pressure line-outgoing/capacitor/section gap.
Above-mentioned distributed sample interface and processing module; possesses conventional simulation amount signal and digital Optical fibre sampling interface; according to scene application needs; the electric current and voltage amount that receiving equipment is required, the synchronous input collection that completes each side protection data of main transformer is resolved or each outlet line load acquisition function of transformer station's mesolow side.Bus instant protection module based on distributed fault identification; comprise internal fault external fault analysis module: the protection information about power gathering according to prime and low-pressure line-outgoing interval/capacitor standoff/section gap protection starts and plant failure information; according to corresponding decentralized fault Rule of judgment and combinational logic, whether analysis judgment system fault is the troubles inside the sample space on main transformer mesolow side bus.
The described bus instant protection module based on distributed fault identification, comprises logic discrimination and protection control module: when fault is bus external area error, and the electric discharge of bus instant protection logic function latch-up protection outlet; When fault is bus troubles inside the sample space; according to protection startup, the actuating signal of low pressure segmentation; low-pressure line-outgoing/capacitor enabling signal; the combinational logic of minute co-bit signal of low standby current protection enabling signal and block switch, downside main transformer switch; judgement differentiation fault type is busbar fault, the malfunctioning dead-zone fault of segmentation or is the malfunctioning dead-zone fault of low side switch; and carry out corresponding protection, excise fast corresponding failure node, low side bus instant protection function in realization.
It should be noted that according to said system, the present embodiment provides a kind of intelligent substation mesolow side bus instant protection method, and its method step comprises as follows:
(1) distributed sample interface and treatment step; According to the interface of the reception conventional simulation amount signal in distributed sample interface and processing module with receive the optical fiber interface of the digital SV sampled value signal that merge cells device sends, distributedly complete the synchronous input collection of each side protection electric current and voltage data of main transformer and the collection of transformer station's each outlet line load of mesolow side.
(2) self adaptation remote signalling data acquisition step; By self adaptation remote signalling data acquisition module, utilize protection startup, the trip protection of low-pressure line-outgoing interval, capacitor standoff, section gap and main transformer mesolow side switch gap in ethernet network and special-purpose GOOSE network ，Dui transformer station, the GOOSE signal of plant failure receives and processes.
The present invention gathers by Ethernet acquisition module protection startup, trip protection, plant failure, the switch position signal that busbar fault is analyzed required low-pressure line-outgoing/capacitor/section gap, by the optical fiber GOOSE acquisition module collection main transformer mesolow side position of the switch, main transformer backup protection, starts/protect actuating signal; The direct access station control of Ethernet acquisition module layer network switch; The direct access procedure layer of the described optical fiber GOOSE acquisition module GOOSE network switch.
(3) the bus instant protection step based on distributed fault identification, according to step (1) and step (2), gather protection information about power and the protection startup of low-pressure line-outgoing interval/capacitor standoff/section gap and plant failure information, bus instant protection module based on distributed fault identification is according to corresponding decentralized fault Rule of judgment and combinational logic, adaptive analysis fault, whether analysis judgment system fault is the troubles inside the sample space on main transformer mesolow side bus, whether comprehensive failure judgement region is the type of middle voltage bus bar troubles inside the sample space and fault, and carry out corresponding busbar fault and protect logic, realize the quick excision of transformer station's mesolow side bus fault,
According to prime, gather, by internal fault external fault analysis module according to corresponding decentralized fault Rule of judgment and combinational logic,
(4) signal is uploaded step; MMS based on IEC 61850 service, by station level MMS serve and the telemetered signal of interface module performing step (3), remote signals, protection enabling signal, busbar fault signal, protection action outlet signal to the information upload service of backstage in station and supervisory control system;
(5) self adaptation control of export step; According to the output information of step (3), by self adaptation control of export module based on ordinary tap amount output with based on the outputing of IEC 61850 GOOSE services, control the protection action tripping operation outlet under types of applications scene.
The present invention is by distributed sample interface and processing module and self adaptation remote signalling data acquisition module, possesses the required protection electric weight of protection in distributed capture station, the function of remote signalling information; Bus instant protection module based on distributed fault identification, possesses according to the decentralized fault Rule of judgment and the combinational logic that gather, and adaptive analysis failure judgement region and fault type are realized transformer station's mesolow side bus fault function of excision fast; Station level MMS service and interface module thereof and self adaptation control of export module, possess system various information based on IEC 61850 and upload with busbar fault and excise fast control of export function.
The present invention can be used in intelligent substation; realize the independently quick protection of the inside and outside all kinds of faults in mesolow side bus district; realized the fast and reliable excision of mesolow side bus fault in transformer station; device damage accident and fault incidence have been reduced; perfect in transformer station mesolow protect fast configuration, effectively improved transformer substation system reliability of operation.
Above-described embodiment does not limit the present invention in any form, all take to be equal to replace or technical scheme that the form of equivalent transformation obtains, within all dropping on protection scope of the present invention.
Claims (10)
1. an intelligent substation mesolow side bus instant protection system, is characterized in that: it comprises:
Distributed sample interface and processing module; Be used for distributed the complete synchronous input collection of each side protection electric current and voltage data of main transformer and the collection of transformer station's each outlet line load of mesolow side;
Self adaptation remote signalling data acquisition module; The GOOSE signal of the protection startup by low-pressure line-outgoing interval, capacitor standoff, section gap and main transformer mesolow side switch gap in ethernet network and special-purpose GOOSE network ，Dui transformer station, trip protection, plant failure receives and processes;
Bus instant protection module based on distributed fault identification; According to the information of prime distributed sample interface and processing module collection, according to corresponding decentralized fault Rule of judgment and combinational logic, adaptive analysis fault, whether comprehensive failure judgement region is the type of middle voltage bus bar troubles inside the sample space and fault, and carry out corresponding busbar fault protection logic, realize the quick excision of transformer station's mesolow side bus fault;
Station level MMS service and interface module thereof; For providing the MMS based on IEC 61850 to serve, realize telemetered signal, remote signals, protection enabling signal, busbar fault signal, protect action outlet signal to the information upload service of stand interior backstage and supervisory control system;
Self adaptation control of export module; For outputing of exporting and serve based on IEC 61850 GOOSE based on ordinary tap amount is provided, realize the protection action tripping operation outlet under types of applications scene;
The output of described distributed sample interface and processing module and self adaptation remote signalling data acquisition module is all connected with the input of bus instant protection module, and the output of described bus instant protection module connects respectively the input of self adaptation control of export module and station level MMS service and interface module thereof.
2. a kind of intelligent substation mesolow side bus instant protection system according to claim 1, is characterized in that: the information that described distributed sample interface and processing module gather is the information of protection information about power, the startup of low-pressure line-outgoing/capacitor/sectionalised protection, plant failure and the position of the switch; Described distributed sample interface and processing module are provided with and can directly receive the interface of conventional simulation amount signal and the optical fiber interface of the digital SV sampled value signal that reception merge cells device sends; according to scene application needs; the electric current and voltage amount that receiving equipment is required, the synchronous input collection that completes each side protection data of main transformer is resolved or each outlet line load collection of transformer station's mesolow side.
3. a kind of intelligent substation mesolow side bus instant protection system according to claim 1; it is characterized in that: described remote signalling data acquisition module; the Ethernet acquisition module that comprises the protection startup of analyzing required low-pressure line-outgoing/capacitor/section gap for gathering busbar fault, trip protection, plant failure, switch position signal, the direct access station control of described Ethernet acquisition module layer network switch.
4. a kind of intelligent substation mesolow side bus instant protection system according to claim 3; it is characterized in that: described self adaptation remote signalling data acquisition module; comprise the optical fiber GOOSE acquisition module that starts/protect actuating signal for gathering the main transformer mesolow side position of the switch, main transformer backup protection, the direct access procedure layer of the described optical fiber GOOSE acquisition module GOOSE network switch.
5. a kind of intelligent substation mesolow side bus instant protection system according to claim 1; it is characterized in that: the described bus instant protection module based on distributed fault identification comprises: internal fault external fault analysis module; the protection information about power gathering according to prime and low-pressure line-outgoing interval/capacitor standoff/section gap protection starts and plant failure information; according to corresponding decentralized fault Rule of judgment and combinational logic, whether analysis judgment system fault is the troubles inside the sample space on main transformer mesolow side bus.
6. a kind of intelligent substation mesolow side bus instant protection system according to claim 5, is characterized in that: the described bus instant protection module based on distributed fault identification
Comprise logic discrimination and protection control module: when fault is bus external area error, the electric discharge of the logic function of bus instant protection module latch-up protection outlet; When fault is bus troubles inside the sample space; according to protection startup, the actuating signal of low pressure segmentation; low-pressure line-outgoing/capacitor enabling signal; the combinational logic of minute co-bit signal of low standby current protection enabling signal and block switch, downside main transformer switch; judgement differentiation fault type is busbar fault, the malfunctioning dead-zone fault of segmentation or is the malfunctioning dead-zone fault of low side switch; and carry out corresponding protection, excise fast corresponding failure node, low side bus instant protection in realization.
7. an intelligent substation mesolow side bus instant protection system, is characterized in that: its method step comprises as follows:
(1) distributed sample interface and treatment step; By receiving the interface of conventional simulation amount signal and receiving the optical fiber interface of the digital SV sampled value signal that merge cells device sends, distributedly complete the synchronous input collection of each side protection electric current and voltage data of main transformer and the collection of transformer station's each outlet line load of mesolow side;
(2) self adaptation remote signalling data acquisition step; The GOOSE signal of the protection startup by low-pressure line-outgoing interval, capacitor standoff, section gap and main transformer mesolow side switch gap in ethernet network and special-purpose GOOSE network ，Dui transformer station, trip protection, plant failure receives and processes;
(3) the bus instant protection step based on distributed fault identification; According to the information of step (1) and step (2) collection, according to corresponding decentralized fault Rule of judgment and other conditional combination logic, adaptive analysis fault, whether comprehensive failure judgement region is the type of middle voltage bus bar troubles inside the sample space and fault, and carry out corresponding busbar fault protection logic, realize the quick excision of transformer station's mesolow side bus fault;
(4) signal is uploaded step; MMS based on IEC 61850 service, by station level MMS serve and the telemetered signal of interface module performing step (3), remote signals, protection enabling signal, busbar fault signal, protection action outlet signal to the information upload service of backstage in station and supervisory control system;
(5) self adaptation control of export step; According to the output information of step (3), by outputing of exporting and serve based on IEC 61850 GOOSE based on ordinary tap amount, the control to the protection action tripping operation outlet under types of applications scene.
8. a kind of intelligent substation mesolow side bus instant protection method according to claim 7, it is characterized in that: in described self adaptation remote signalling data acquisition step, by Ethernet acquisition module, gather protection startup, trip protection, plant failure, the switch position signal that busbar fault is analyzed required low-pressure line-outgoing/capacitor/section gap, by the optical fiber GOOSE acquisition module collection main transformer mesolow side position of the switch, main transformer backup protection, start/protect actuating signal;
The direct access station control of described Ethernet acquisition module layer network switch; The direct access procedure layer of the described optical fiber GOOSE acquisition module GOOSE network switch.
9. a kind of intelligent substation mesolow side bus instant protection method according to claim 8; it is characterized in that: in the described bus instant protection step based on distributed fault identification; the protection information about power gathering according to prime and low-pressure line-outgoing interval/capacitor standoff/section gap protection starts and plant failure information; by internal fault external fault analysis module, according to corresponding decentralized fault Rule of judgment and combinational logic, whether analysis judgment system fault is the troubles inside the sample space on main transformer mesolow side bus.
10. according to a kind of intelligent substation mesolow side bus instant protection method described in claim 7 to 9 any one, it is characterized in that: in the described bus instant protection step based on distributed fault identification, when fault is bus external area error, the electric discharge of bus instant protection logic function latch-up protection outlet;
When fault is bus troubles inside the sample space; according to protection startup, the actuating signal of low pressure segmentation; low-pressure line-outgoing/capacitor enabling signal; the combinational logic of minute co-bit signal of low standby current protection enabling signal and block switch, downside main transformer switch; judgement differentiation fault type is busbar fault, the malfunctioning dead-zone fault of segmentation or is the malfunctioning dead-zone fault of low side switch; and carry out corresponding protection, excise fast corresponding failure node.
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| CN103872656A (en) * | 2014-03-13 | 2014-06-18 | 国家电网公司 | Distributive bus fast protection realization method for intelligent transformer substation |
| CN105162098A (en) * | 2015-07-06 | 2015-12-16 | 四川艾德瑞电气有限公司 | On-line medium voltage ring network system fault simulation method based on GOOSE technology |
| CN105162098B (en) * | 2015-07-06 | 2018-06-22 | 四川艾德瑞电气有限公司 | A kind of middle pressure ring net system failure online simulation method based on GOOSE technologies |
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Application publication date: 20140205 |