CN205027857U - Ground connection route selection device suitable for intelligent substation - Google Patents
Ground connection route selection device suitable for intelligent substation Download PDFInfo
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- CN205027857U CN205027857U CN201520766060.4U CN201520766060U CN205027857U CN 205027857 U CN205027857 U CN 205027857U CN 201520766060 U CN201520766060 U CN 201520766060U CN 205027857 U CN205027857 U CN 205027857U
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Abstract
The utility model discloses a ground connection route selection device suitable for intelligent substation, including communication module no. 1, the fourier transform module, communication module two, communication module three, route selection module and communication module four, wherein, communication module no. 1 links to each other with the route selection module through the fourier transform module, communication module two, three difference of communication module, communication module no. 4 links to each other with the route selection module, the ground connection route selection device of above -mentioned structure, completely with the help of the current framework system of intelligent substation, according to 61850 each modules of standard design route selection device of IEC, realize the standardization of route selection device.
Description
Technical field
The utility model relates to a kind of single-phase earth fault line selection device of distribution network system, particularly relates to one and is applicable to the standardized novel grounded line selection apparatus of intelligent substation IEC61850.
Background technology
China 6kV-66kV power distribution network majority is small current neutral grounding mode, main employing neutral by arc extinction coil grounding mode.For Single-phase Earth-fault Selection in Distribution Systems problem, domestic a lot of scholar and mechanism are proposed route selection technology and the line selection apparatus of distinct methods through research, but for the rare achievement of research of the line-selected earthing device being applicable to intelligent substation.Along with the intelligent substation construction based on IEC61850 standard spreads out gradually in China, traditional fault line selection for indirectly grounding power system device can not meet the networked communication requirement of intelligent substation.Therefore, realize the novel grounded line selection apparatus meeting IEC61850 standard traffic, become the active demand that intelligent substation is built.
Neutral point grounding through arc mode, by arc suppression coil two ends paralleled medium resistance, can when there is ground connection, by local intelligent unit controls, drop into medium resistance, the zero sequence to earth fault line injects certain current in resistance property, for intelligent substation line selection apparatus provides route selection foundation.
Utility model content
This real utility model can not meet the situation of intelligent substation IEC61850 Standardization Communication requirement for existing line selection apparatus, and a kind of novel grounded line selection apparatus being applicable to intelligent substation is provided, completely by the existing structure system of intelligent substation, according to IEC61850 standard design line selection apparatus modules, realize the standardization of line selection apparatus.
In order to achieve the above object, the utility model adopts following technical scheme:
A kind of line-selected earthing device being applicable to intelligent substation, comprise communication module one, Fourier transform module, communication module three, route selection module and communication module four, wherein, described communication module one is connected with Fourier transform module, obtain neutral point voltage signal from local intelligent unit, and neutral point voltage signal is sent to Fourier transform module; Described Fourier transform module and described route selection model calling, Fourier transform module, by the discrete time-domain voltage sampling signal of input, is transformed to frequency-region signal, then through inverse transformation, sends to route selection module; Described communication module three and described route selection model calling, obtain from the network switch zero-sequence current 3I0 information that each bar circuit measuring and controlling protective device uploads; The zero-sequence current 3I0 information that the neutral point voltage signal that described route selection module obtains according to communication module one, communication module three obtain completes route selection, and the signal output part of route selection module is connected with communication module four; Route selection result is sent to integrated automation of transformation stations backstage by described communication module four.
As preferably, described line-selected earthing device comprises communication module two further, and described communication module two is connected with described route selection module and local intelligent unit respectively, for controlling input and the excision of medium resistance.
As preferably, described communication module one, communication module two, communication module three adopt fiber optic Ethernet interface; Communication module four adopts twisted-pair Ethernet interface.
As preferably, described communication module one, communication module two, communication module three adopt 100BaseF fiber optic Ethernet interface, and communication module four adopts 100BaseT twisted-pair Ethernet interface.
The line-selected earthing device being applicable to intelligent substation described in the utility model, has following advantage:
(1), by several communication module, make each IO interface realize digitizing completely, data transmission realizes networking, and communication protocol meets intelligent substation IEC61850 standard-required completely;
(2) feature, based on intelligent substation data sharing obtains from the network switch 3I0 information that each bar circuit measuring and controlling protective device uploads, communication media only needs an optical cable or netting twine, save a large amount of zero sequence current signal cables compared with traditional line selection apparatus, reduce site operation workload simultaneously;
(3), utilize intelligent substation existing network switch transmission data, without the need to newly added equipment, and the data obtained have good real-time;
(4), the 3I0 signal that obtains of route selection module is signal after digitizing, without loss and antijamming capability enhancing;
(5), technical scheme described in the utility model both can by communication module two and paralleled medium resistance with the use of, be also applicable to the fault line selection for indirectly grounding power system not having paralleled medium resistance.
Below in conjunction with drawings and the specific embodiments, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is the line-selected earthing device being applicable to intelligent substation of the present embodiment.
Embodiment
As shown in Figure 1, a kind of line-selected earthing device being applicable to intelligent substation, comprises communication module 1, Fourier transform module 2, communication module 23, communication module 34, route selection module 5 and communication module 46, wherein,
Described communication module 1 is connected with Fourier transform module 2, adopts the service of IEC618509-2SMV sampled value to obtain neutral point voltage signal from local intelligent unit 7, and neutral point voltage signal is sent to Fourier transform module;
Described Fourier transform module 2 is connected with described route selection module 5, Fourier transform module 2, by the discrete time-domain voltage sampling signal of input, is transformed to frequency-region signal, then through inverse transformation, obtain the first-harmonic of voltage signal and amplitude, the phase information of each harmonic, and send to route selection module 5;
Described communication module 23 is connected with described route selection module 5, adopts GOOSE service to be connected with local intelligent unit 7, for controlling input and the excision of medium resistance;
Described communication module 34 is connected with described route selection module 5, adopts GOOSE service to obtain from the network switch 8 the zero-sequence current 3I0 information that each bar circuit measuring and controlling protective device uploads;
The zero-sequence current 3I0 information that the neutral point voltage signal that described route selection module 5 obtains according to communication module 1, communication module 34 obtain completes route selection, and the signal output part of route selection module 5 is connected with communication module 46;
Described communication module 46 adopts MMS service that route selection result is sent to integrated automation of transformation stations backstage 9.
In the present embodiment, described communication module 1, communication module 23, communication module 34 adopt 100BaseF fiber optic Ethernet interface, are responsible for the GOOSE communication for service form of process IEC61850 standard; Communication module 46 adopts 100BaseT twisted-pair Ethernet interface, is responsible for the MMS communication for service form of process IEC61850 standard.
The line-selected earthing device being applicable to intelligent substation described in the present embodiment, by several communication module, makes each IO interface realize digitizing completely, and data transmission realizes networking, and communication protocol meets intelligent substation IEC61850 standard-required completely; And communication media only needs an optical cable or netting twine, save a large amount of zero sequence current signal cables compared with traditional line selection apparatus, reduced site operation workload simultaneously; Both can by communication module two and paralleled medium resistance with the use of, be also applicable to the fault line selection for indirectly grounding power system not having paralleled medium resistance.
Main improvement of the present utility model is the line-selected earthing device adopting multiple block combiner, and the software participated in implementation process and protocol part are prior art, do not belong to improvement of the present utility model.
Above-described embodiment and graphic and non-limiting product form of the present utility model and style, any person of an ordinary skill in the technical field, to its suitable change done or modification, all should be considered as not departing from patent category of the present utility model.
Claims (4)
1. one kind is applicable to the line-selected earthing device of intelligent substation, it is characterized in that: comprise communication module one, Fourier transform module, communication module three, route selection module and communication module four, wherein, described communication module one is connected with Fourier transform module, obtain neutral point voltage signal from local intelligent unit, and neutral point voltage signal is sent to Fourier transform module; Described Fourier transform module and described route selection model calling, Fourier transform module, by the discrete time-domain voltage sampling signal of input, is transformed to frequency-region signal, then through inverse transformation, sends to route selection module; Described communication module three and described route selection model calling, obtain from the network switch zero-sequence current 3I0 information that each bar circuit measuring and controlling protective device uploads; The zero-sequence current 3I0 information that the neutral point voltage signal that described route selection module obtains according to communication module one, communication module three obtain completes route selection, and the signal output part of route selection module is connected with communication module four; Described communication module four adopts MMS to serve and route selection result is sent to integrated automation of transformation stations backstage.
2. a kind of line-selected earthing device being applicable to intelligent substation as claimed in claim 1, it is characterized in that: described line-selected earthing device comprises communication module two further, described communication module two is connected with described route selection module and local intelligent unit respectively, for controlling input and the excision of medium resistance.
3. a kind of line-selected earthing device being applicable to intelligent substation as claimed in claim 2, is characterized in that: described communication module one, communication module two, communication module three adopt fiber optic Ethernet interface; Communication module four adopts twisted-pair Ethernet interface.
4. a kind of line-selected earthing device being applicable to intelligent substation as claimed in claim 2, it is characterized in that: described communication module one, communication module two, communication module three adopt 100BaseF fiber optic Ethernet interface, communication module four adopts 100BaseT twisted-pair Ethernet interface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520766060.4U CN205027857U (en) | 2015-09-30 | 2015-09-30 | Ground connection route selection device suitable for intelligent substation |
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| CN201520766060.4U CN205027857U (en) | 2015-09-30 | 2015-09-30 | Ground connection route selection device suitable for intelligent substation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105223469A (en) * | 2015-09-30 | 2016-01-06 | 国网浙江省电力公司绍兴供电公司 | A kind of line-selected earthing device being applicable to intelligent substation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105223469A (en) * | 2015-09-30 | 2016-01-06 | 国网浙江省电力公司绍兴供电公司 | A kind of line-selected earthing device being applicable to intelligent substation |
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Granted publication date: 20160210 Termination date: 20200930 |
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| CF01 | Termination of patent right due to non-payment of annual fee |