CN106340860A - Method for determining feedback protection control of distribution network automatic terminal on the basis of current signals - Google Patents
Method for determining feedback protection control of distribution network automatic terminal on the basis of current signals Download PDFInfo
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- CN106340860A CN106340860A CN201610894603.XA CN201610894603A CN106340860A CN 106340860 A CN106340860 A CN 106340860A CN 201610894603 A CN201610894603 A CN 201610894603A CN 106340860 A CN106340860 A CN 106340860A
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- Prior art keywords
- fault
- protection
- tension line
- voltage
- chopper
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
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- Emergency Protection Circuit Devices (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a method for determining feedback protection control of a distribution network automatic terminal on the basis of current signals. According to the method, currents are taken as a major criterion, and switch position signals and voltage measurement values are taken as auxiliary criteria. The method comprises the following steps: step one, selecting communication high-voltage line areas between a plurality of devices, and taking a circuit breaker of a high-voltage line between any two devices as a section switch; and step two, when a fault occurs in the high-voltage line of any one area and fault currents flow, after low voltages occur at a fault-free side, the isolating the faults, and ending power supply restoration. The feeder protection system can rapidly process the fault and does not need multiple superposition; the fault is rapidly cut off, and electric energy quality of a motor type load is improved; the fault is directly isolated in a fault section, and a non-fault section is not affected; and functions are completed through a feeder protection apparatus, and cooperation between a distribution main station and a substation is unnecessary.
Description
Technical field
The invention belongs to system for distribution network of power technical field of automation, more particularly to judge distribution certainly based on current signal
Dynamicization terminal feedback protects control method.
Background technology
Power system is by generating electricity, transmission and disttrbution three part forms.The protection of generating link concentrates on element protection, its master
Syllabus be to ensure that power plant occur electric fault when the loss of equipment is reduced to minimum.The protection of power transmission network concentrates on power transmission line
The protection on road, its primary and foremost purpose is to safeguard stablizing of electrical network.The protection of distribution link concentrates on protection for feed line, and power distribution network is not deposited
In stable problem it is considered that feeder fault excise that not to be strict be quick.Different power distribution networks is powered to load
Reliability is different with power supply quality requirement.Many power distribution networks are only to consider the impact to electricity sales amount for the line fault and controller switching equipment longevity
The impact of life, the purpose negatively affecting as distribution protection to electric load (user) not yet using distribution network failure.
With China's expanding economy, the dependency of power consumer electricity consumption is more and more stronger, power supply reliability and power supply electric energy
Quality becomes the focus of power distribution network, and the Main Function of distribution feeder protection also becomes raising power supply reliability and raising
The quality of power supply, specifically includes feeder fault excision, Fault Isolation and restores electricity.
Content of the invention
It is an object of the invention to provide distribution automation terminal feedback protection control method is judged based on current signal, lead to
Cross the selectivity that the communication of feeder system Sustainable use achieves protection, by Fault Identification, Fault Isolation, reclosing, recover fault
Disposably complete, solve existing problem.
For solving above-mentioned technical problem, the present invention is achieved by the following technical solutions:
The present invention is to judge distribution automation terminal feedback protection control method based on current signal, and the method is made with electric current
For main criterion, using switch position signal and voltage measuring value as assistant criteria, comprise the steps:
Step one, if choose high pressure between high-tension line region, and one or two device in office for the communication between equipment for drying
The chopper of circuit is as block switch；
Step 2, when the high-tension line of any region breaks down, flows through fault current, low-voltage in fault-free side
Afterwards, enter step 3；
Step 3, protection starts, and the high-tension line connection of the chopper of fault-free side starts；
Step 4, protection calculates fault section information；
Step 5, communicates between adjacent protection；
Step 6, the chopper of the high-tension line breaking down starts, and excises fault, if start successfully going to step
Eight；
Step 7, if coinciding with fault, then tripping；Do not record voltage to recover in time △ t；
Step 8, records voltage within the △ t time and recovers to go to step 9；
Step 9, Fault Isolation, restore electricity end.
Feeder system protection is to a great extent along the basic principle having continued HV line pilot protection.Due to power distribution network
Communication condition is likely to very good.The performance of the protection for feed line function of realizing on here basis greatly improves.Feeder system
Sustainable use communication achieves the selectivity of protection, and Fault Identification, Fault Isolation, reclosing, recovery fault are disposably completed,
Have the advantage that quick handling failure, be not required to repeatedly overlap；Quick excision fault, improves the electric energy of motor type load
Quality；Directly by Fault Isolation in fault section, do not affect non-faulting section；Function completes to transfer to feeder protection equipment, no
Need distribution main website, substation cooperation.
The method have the advantages that
The feeder system protection of the present invention has quick handling failure, is not required to repeatedly overlap；Quick excision fault, improves
The quality of power supply of motor type load；Directly by Fault Isolation in fault section, do not affect non-faulting section；Function completes to transfer
To feeder protection equipment, without distribution main website, substation cooperation.
Certainly, the arbitrary product implementing the present invention it is not absolutely required to reach all the above advantage simultaneously.
Brief description
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below by use required for embodiment description
Accompanying drawing be briefly described it should be apparent that, drawings in the following description are only some embodiments of the present invention, for ability
For the those of ordinary skill of domain, on the premise of not paying creative work, can also be obtained other attached according to these accompanying drawings
Figure.
Fig. 1 is the flow chart judging distribution automation terminal feedback protection control method based on current signal of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is all other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
Refer to shown in Fig. 1, the present invention is based on current signal, one kind judges that distribution automation terminal feedback protection controls
Method, including the method using electric current as main criterion, using switch position signal and voltage measuring value as assistant criteria, including
Following steps:
Step one, if choose high pressure between high-tension line region, and one or two device in office for the communication between equipment for drying
The chopper of circuit is as block switch；
Step 2, when the high-tension line of any region breaks down, flows through fault current, low-voltage in fault-free side
Afterwards, enter step 3；
Step 3, protection starts, and the high-tension line connection of the chopper of fault-free side starts；
Step 4, protection calculates fault section information；
Step 5, communicates between adjacent protection；
Step 6, the chopper of the high-tension line breaking down starts, and excises fault, if start successfully going to step
Eight；
Step 7, if coinciding with fault, then tripping；Do not record voltage to recover in time △ t；
Step 8, records voltage within the △ t time and recovers to go to step 9；
Step 9, Fault Isolation, restore electricity end.
Feeder system protection is to a great extent along the basic principle having continued HV line pilot protection.Due to power distribution network
Communication condition is likely to very good.The performance of the protection for feed line function of realizing on here basis greatly improves.Feeder system
Sustainable use communication achieves the selectivity of protection, and Fault Identification, Fault Isolation, reclosing, recovery fault are disposably completed,
Have the advantage that quick handling failure, be not required to repeatedly overlap；Quick excision fault, improves the electric energy of motor type load
Quality；Directly by Fault Isolation in fault section, do not affect non-faulting section；Function completes to transfer to feeder protection equipment, no
Need distribution main website, substation cooperation.
In the description of this specification, the description of reference term " embodiment ", " example ", " specific example " etc. means
It is contained at least one enforcement of the present invention in conjunction with the specific features of this embodiment or example description, structure, material or feature
In example or example.In this manual, identical embodiment or example are not necessarily referring to the schematic representation of above-mentioned term.
And, the specific features of description, structure, material or feature can be to close in any one or more embodiments or example
Suitable mode combines.
Present invention disclosed above preferred embodiment is only intended to help illustrate the present invention.Preferred embodiment is not detailed
Describe all of details, also do not limit the specific embodiment that this invention is only described.Obviously, the content according to this specification,
Can make many modifications and variations.This specification is chosen and is specifically described these embodiments, is to preferably explain the present invention
Principle and practical application so that skilled artisan can be best understood by and utilize the present invention.The present invention is only
Limited by claims and its four corner and equivalent.
Claims (1)
1. distribution automation terminal feedback protection control method is judged based on current signal, the method is using electric current as mainly sentencing
According to using switch position signal and voltage measuring value as assistant criteria it is characterised in that comprising the steps:
Step one, if choose high-tension line between high-tension line region, and one or two device in office for the communication between equipment for drying
Chopper as block switch；
Step 2, when the high-tension line of any region breaks down, flows through fault current, after low-voltage in fault-free side, enters
Enter step 3；
Step 3, protection starts, and the high-tension line connection of the chopper of fault-free side starts；
Step 4, protection calculates fault section information；
Step 5, communicates between adjacent protection；
Step 6, the chopper of the high-tension line breaking down starts, and excises fault, if start successfully going to step 8；
Step 7, if coinciding with fault, then tripping；Do not record voltage to recover in time △ t；
Step 8, records voltage within the △ t time and recovers to go to step 9；
Step 9, Fault Isolation, restore electricity end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610894603.XA CN106340860B (en) | 2016-10-13 | 2016-10-13 | Judge distribution automation terminal feedback protection control method based on current signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610894603.XA CN106340860B (en) | 2016-10-13 | 2016-10-13 | Judge distribution automation terminal feedback protection control method based on current signal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106340860A true CN106340860A (en) | 2017-01-18 |
| CN106340860B CN106340860B (en) | 2018-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610894603.XA Active CN106340860B (en) | 2016-10-13 | 2016-10-13 | Judge distribution automation terminal feedback protection control method based on current signal |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7154722B1 (en) * | 2001-09-05 | 2006-12-26 | Abb Technology Ag | Loop control for distribution systems |
| CN102801143A (en) * | 2012-09-04 | 2012-11-28 | 山西省电力公司大同供电分公司 | Device and method for automatically isolating automatic system line fault in power distribution network |
| CN102904228A (en) * | 2012-10-17 | 2013-01-30 | 南京因泰莱配电自动化设备有限公司 | Protection method and protection device of power distribution network |
| CN103280781A (en) * | 2013-05-07 | 2013-09-04 | 清华大学 | Fault self-healing method for neutral point effective earthing system |
| CN103606910A (en) * | 2013-12-06 | 2014-02-26 | 云南电网公司大理供电局 | Wide area information based fault self-healing method for dead zone of feeder outlet of distribution network |
| CN106026045A (en) * | 2016-06-28 | 2016-10-12 | 国网山东省电力公司济南供电公司 | Fault handling method for cable line comprising distributed power supply |
-
2016
- 2016-10-13 CN CN201610894603.XA patent/CN106340860B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7154722B1 (en) * | 2001-09-05 | 2006-12-26 | Abb Technology Ag | Loop control for distribution systems |
| CN102801143A (en) * | 2012-09-04 | 2012-11-28 | 山西省电力公司大同供电分公司 | Device and method for automatically isolating automatic system line fault in power distribution network |
| CN102904228A (en) * | 2012-10-17 | 2013-01-30 | 南京因泰莱配电自动化设备有限公司 | Protection method and protection device of power distribution network |
| CN103280781A (en) * | 2013-05-07 | 2013-09-04 | 清华大学 | Fault self-healing method for neutral point effective earthing system |
| CN103606910A (en) * | 2013-12-06 | 2014-02-26 | 云南电网公司大理供电局 | Wide area information based fault self-healing method for dead zone of feeder outlet of distribution network |
| CN106026045A (en) * | 2016-06-28 | 2016-10-12 | 国网山东省电力公司济南供电公司 | Fault handling method for cable line comprising distributed power supply |
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| CN106340860B (en) | 2018-10-02 |
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