CN205384343U - Undercurrent earth fault detecting system of electric substation - Google Patents
Undercurrent earth fault detecting system of electric substation Download PDFInfo
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- CN205384343U CN205384343U CN201521050623.6U CN201521050623U CN205384343U CN 205384343 U CN205384343 U CN 205384343U CN 201521050623 U CN201521050623 U CN 201521050623U CN 205384343 U CN205384343 U CN 205384343U
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- terminal
- low current
- detecting device
- electric substation
- current grounding
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model provides an undercurrent earth fault detecting system of electric substation, include: the transformer is undercurrent earth fault detection device in one's power, the electric substation includes a plurality of high tension switchgear, high tension switchgear includes a plurality of secondary circuit terminals, undercurrent earth fault detection device includes that a plurality of zero sequence current insert the terminal, the secondary circuit terminal with zero sequence current inserts the terminal one -to -one and connects. Above -mentioned undercurrent earth fault detecting system of electric substation can realize the real -time supervision in each return circuit of electric substation to fault line be can judge, the detection speed and the degree of accuracy have been improved.
Description
Technical field
This utility model relates to detection technique field, particularly relates to a kind of electric substation low current grounding detection system.
Background technology
Continuous expansion recently as electric power system scale, the industries such as electric power, chemical industry, coal and mine all inevitably increase transmission line circuit, the equipment such as a large amount of use cables, meanwhile, if system occurs that earth fault long-play will result in system insulation weak spot puncture short, thus causing failure propagation.
Existing electric substation can utilize the zero current transformer in each loop to monitor zero-sequence current, by protecting device automatic trip or warning when zero current exceedes threshold value.Although said method serves the effect of protection system and warning, but needs operations staff that all of feeder line is manually determined the loop broken down by road drawing, and the accuracy of failure judgement is relatively low.Additionally, less at zero-sequence current or occur interference, will be unable to fault current be detected.
Utility model content
This utility model provides a kind of electric substation low current grounding detection system, it may be achieved the real-time monitoring in each loop of electric substation, and can quote faulty line in time, improves the promptness of handling failure.
This utility model provides a kind of electric substation low current grounding detection system, including:
Power transformation is low current grounding detecting device in one's power；
Described electric substation includes multiple high-tension switch cabinet, and described high-tension switch cabinet includes multiple secondary circuit terminal；
Described low current grounding detecting device includes multiple zero-sequence current and accesses terminal, and described secondary circuit terminal and described zero-sequence current access terminal and connect one to one.
Preferably, described system also includes: monitoring host computer, and described monitoring host computer is connected with described high-tension switch cabinet and described low current grounding detecting device.
Preferably, described low current grounding detecting device also includes: communication module；
Described communication module is connected with described monitoring host computer.
Preferably, zero sequence current mutual inductor is installed in each primary circuit of described high-tension switch cabinet；
The secondary circuit terminal of the terminals of described zero sequence current mutual inductor and described high-tension switch cabinet connects one to one.
Preferably, described low current grounding detecting device also includes: multiple residual voltages access terminal；
Described residual voltage accesses the bus section, busbar section residual voltage terminal of terminal and described high-tension switch cabinet and connects one to one.
Preferably, described low current grounding detecting device also includes: warning lead-out terminal；
Described warning lead-out terminal connects warning device.
Preferably, the earthing of casing of described low current grounding detecting device.
As shown from the above technical solution, electric substation of the present utility model low current grounding detection system, zero sequence current mutual inductor is installed in each primary circuit of each high-tension switch cabinet of electric substation, and the secondary circuit terminal of the terminals of each zero sequence current mutual inductor Yu described high-tension switch cabinet is connected one to one；Small area analysis being connected earth fault detecting device zero-sequence current again and accesses terminal, described secondary circuit terminal and described zero-sequence current access terminal and connect one to one；Communicated by communication module and monitoring host computer.Hereby it is achieved that the real-time monitoring in each loop of electric substation, and faulty line can be quoted in time, improve the promptness of handling failure.
Accompanying drawing explanation
The structural representation of electric substation's low current grounding detection system that Fig. 1 provides for this utility model embodiment；
The access terminal arrangement schematic diagram of the low current grounding detecting device that Fig. 2 provides for this utility model embodiment.
Detailed description of the invention
Below in conjunction with drawings and Examples, detailed description of the invention of the present utility model is described in further detail.Following example are used for illustrating this utility model, but are not limited to scope of the present utility model.
Fig. 1 illustrates that electric substation's low current grounding that this utility model one embodiment provides detects the structural representation of system, as it is shown in figure 1, electric substation's low current grounding detection system of the present embodiment includes: electric substation 1 and low current grounding detecting device 2.
Wherein, electric substation 1 includes multiple high-tension switch cabinet 11, and each high-tension switch cabinet 11 includes multiple secondary circuit terminal 111；
Low current grounding detecting device 2 includes multiple zero-sequence current and accesses terminal 21, and above-mentioned secondary circuit terminal 111 and zero-sequence current access terminal 21 and connect one to one.
In actual applications, above-mentioned electric substation's low current grounding detection system, also include monitoring host computer 3, monitoring host computer 3 is connected with described low current grounding detecting device 2.
Preferably, above-mentioned low current grounding detecting device 2 also includes: communication module 22, and communication module 22 is connected with monitoring host computer 3.
When specifically applying, the secondary circuit terminal 111 of high-tension switch cabinet 11 is all with numbering, and this numbering can be the Universal Number of power system, it is possible to for specifically numbering according to actual needs, the present embodiment is not limited thereof.Meanwhile, the zero-sequence current of above-mentioned low current grounding detecting device 2 accesses terminal 21 with numbering, and when connecting each line, the corresponding terminal one_to_one corresponding of numbering that the numbering of above-mentioned secondary circuit terminal 111 accesses terminal 21 with zero-sequence current is connected.Thus, low current grounding detecting device 2 can detect the zero-sequence current in each loop in real time, when zero-sequence current on a certain road occurs abnormal, low current grounding detecting device 2 adopts maximal increment method to select faulty line, this circuit number information is sent monitoring host computer by communication module 22, reported to the police for faulty line by main frame again, remind operations staff's handling failure.
Electric substation's low current grounding detection system of the present embodiment, zero sequence current mutual inductor is installed in each primary circuit of each high-tension switch cabinet of electric substation, and the secondary circuit terminal of the terminals of each zero sequence current mutual inductor Yu described high-tension switch cabinet is connected one to one；Small area analysis being connected earth fault detecting device zero-sequence current again and accesses terminal, described secondary circuit terminal and described zero-sequence current access terminal and connect one to one；Communicated by communication module and monitoring host computer.Hereby it is achieved that the real-time monitoring in each loop of electric substation, and faulty line can be quoted in time, improve the promptness of handling failure.
In concrete application process, detect whether each primary circuit earth fault occurs by installing zero sequence current mutual inductor in the aforesaid each primary circuit of high-tension switch cabinet 11.Under normal circumstances, each zero sequence current mutual inductor can include two terminals.The terminals of the zero sequence current mutual inductor of each high-tension switch cabinet primary circuit and the secondary circuit terminal 111 of high-voltage board 11 connect one to one.
Further, the zero-sequence current of low current grounding detecting device 2 is accessed terminal 21 and connects one to one according to numbering with above-mentioned secondary circuit terminal 111, thus detecting the zero-sequence current in each loop in real time.
Preferably, above-mentioned low current grounding detecting device 2 also includes multiple residual voltage and accesses terminal, and the arrangement mode of each access terminal is as shown in Figure 2.Low current grounding detecting device shown in Fig. 2 is except being accessed terminal by zero-sequence current, I30-1, I30-1, I31-1 and I31-2 as shown in Figure 2, access outside the zero-sequence current in each loop, also can be accessed terminal by residual voltage, U1-1, U1-2, U2-1 and U2-1 as shown in Figure 2, accesses the residual voltage of bus section, busbar section.
Additionally, above-mentioned low current grounding detecting device 2 may also include warning lead-out terminal, this warning lead-out terminal can connect warning device.For example, can locate to connect audible-visual annunciator at terminal K1-1 and the K1-2 shown in Fig. 2.
Specifically, when there is earth fault in certain primary Ioops, low current grounding detecting device 2 will appear from the loop numbering of fault and sends monitoring host computer 3, judged whether that output is reported to the police by monitoring host computer 3, can when above-mentioned monitoring host computer 3 be judged as YES, the alarm signal of output, triggers audible-visual annunciator and sends alarm sound or light display lamp prompting staff's line failure, thus releasing fault in time, it is ensured that electric substation properly functioning.
When practical application, the earthing of casing of above-mentioned low current grounding detecting device 2.It is also desirable to each road zero sequence current mutual inductor link correspondence accesses the corresponding Same Name of Ends of low current grounding detecting device, and each road zero sequence current mutual inductor earth terminal is switch cubicle place ground connection.
Electric substation's low current grounding detection system of the present embodiment, zero sequence current mutual inductor is installed in each primary circuit of each high-tension switch cabinet of electric substation, and the secondary circuit terminal of the terminals of each zero sequence current mutual inductor Yu described high-tension switch cabinet is connected one to one；Small area analysis being connected earth fault detecting device zero-sequence current again and accesses terminal, described secondary circuit terminal and described zero-sequence current access terminal and connect one to one；Communicated by communication module and monitoring host computer.Hereby it is achieved that the real-time monitoring in each loop of electric substation, and faulty line can be quoted in time, improve the promptness of handling failure.
Last it is noted that various embodiments above is only in order to illustrate the technical solution of the utility model, it is not intended to limit；Although this utility model being described in detail with reference to foregoing embodiments, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein some or all of technical characteristic is carried out equivalent replacement；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of claim of the present utility model protection.
Claims (7)
1. electric substation's low current grounding detection system, it is characterised in that described system includes: power transformation is low current grounding detecting device in one's power；
Described electric substation includes multiple high-tension switch cabinet, and described high-tension switch cabinet includes multiple secondary circuit terminal；
Described low current grounding detecting device includes multiple zero-sequence current and accesses terminal, and described secondary circuit terminal and described zero-sequence current access terminal and connect one to one.
2. system according to claim 1, it is characterised in that described system also includes: monitoring host computer, described monitoring host computer is connected with described low current grounding detecting device.
3. system according to claim 2, it is characterised in that described low current grounding detecting device also includes: communication module；
Described communication module is connected with described monitoring host computer.
4. system according to claim 1, it is characterised in that zero sequence current mutual inductor is installed in each primary circuit of described high-tension switch cabinet；
The secondary circuit terminal of the terminals of described zero sequence current mutual inductor and described high-tension switch cabinet connects one to one.
5. system according to claim 1, it is characterised in that described low current grounding detecting device also includes: multiple residual voltages access terminal；
Described residual voltage accesses the bus section, busbar section residual voltage terminal of terminal and described high-tension switch cabinet and connects one to one.
6. system according to claim 1, it is characterised in that described low current grounding detecting device also includes: warning lead-out terminal；
Described warning lead-out terminal connects warning device.
7. the system according to any one of claim 1 to 6, it is characterised in that the earthing of casing of described low current grounding detecting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521050623.6U CN205384343U (en) | 2015-12-15 | 2015-12-15 | Undercurrent earth fault detecting system of electric substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521050623.6U CN205384343U (en) | 2015-12-15 | 2015-12-15 | Undercurrent earth fault detecting system of electric substation |
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| Publication Number | Publication Date |
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| CN205384343U true CN205384343U (en) | 2016-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521050623.6U Active CN205384343U (en) | 2015-12-15 | 2015-12-15 | Undercurrent earth fault detecting system of electric substation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107905641A (en) * | 2017-10-10 | 2018-04-13 | 国网浙江省电力公司衢州供电公司 | A kind of switchgear anti-misoperation locking device |
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2015
- 2015-12-15 CN CN201521050623.6U patent/CN205384343U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107905641A (en) * | 2017-10-10 | 2018-04-13 | 国网浙江省电力公司衢州供电公司 | A kind of switchgear anti-misoperation locking device |
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| GR01 | Patent grant |