CN103986131B - The 750kV line protection systems of wind power integration AC-DC hybrid power grid - Google Patents
The 750kV line protection systems of wind power integration AC-DC hybrid power grid Download PDFInfo
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- CN103986131B CN103986131B CN201410187640.8A CN201410187640A CN103986131B CN 103986131 B CN103986131 B CN 103986131B CN 201410187640 A CN201410187640 A CN 201410187640A CN 103986131 B CN103986131 B CN 103986131B
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- 230000010354 integration Effects 0.000 title claims abstract description 8
- 239000013307 optical fiber Substances 0.000 claims abstract description 10
- 230000008447 perception Effects 0.000 claims abstract description 5
- 230000001681 protective effect Effects 0.000 claims abstract description 5
- 230000005611 electricity Effects 0.000 claims description 21
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- 230000001052 transient effect Effects 0.000 description 2
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- 238000000354 decomposition reaction Methods 0.000 description 1
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Abstract
The invention discloses a kind of 750kV line protection systems of wind power integration AC-DC hybrid power grid, the system configuration is as follows：Main protection configuration：The high frequency Unit protection constituted using optical fiber differential protective and based on full dose direction or full dose distance, and time domain or the frequency domain pilot protection that perception differentiates are held based on model using optical-fibre channel configuration；Back-up protection is configured：Using zero sequence and the distance protection based on full dose；Phase selection element：Using the phase selection element based on difference current.The purpose for ensureing power network safety operation in the case where large-scale wind power accesses AC-DC hybrid power grid is reached.
Description
Technical field
The present invention relates to wind-powered electricity generation field, in particular it relates to a kind of consider that large-scale wind power accesses AC-DC hybrid power grid
750kV line protection systems.
Background technology
At present, China's wind-powered electricity generation enters after the large-scale development stage that produced large-scale wind electricity base is most to be located at " three Norths
Area "（Northwest, northeast, North China）, large-scale wind electricity base is generally off-site from load center, and its electric power is needed through long-distance, electricity high
Pressure is transported to load center and is dissolved.Due to the intermittent of wind-resources, randomness and fluctuation, cause large-scale wind power base
Wind power output large range of fluctuation can occur therewith, further result in the fluctuation of power transmission network trend, give operation of power networks peace
Bring a series of problems entirely.
By 2 months 2014, Gansu Power Grid grid connected wind power installed capacity reached 7,020,000 kilowatts, accounts for Gansu Power Grid total
The 21% of installed capacity, as the second largest main force's power supply for being only second to thermoelectricity.Continuous improvement, 750kV with wind-electricity integration scale
Ultrahigh-voltage alternating-current sends the operation of circuit outside and Jiuquan-Zhuzhou ± 800kV extra-high voltage direct-currents send the reply of circuit, Jiuquan outside
Ten million multikilowatt wind power base will start concentration extensive, high, remote, ultrahigh-voltage alternating-current and combine conveying with extra-high voltage direct-current
New energy development model.A large amount of power electronic devices are introduced due to the fluctuation of large-scale wind power, in wind power system so that failure
When transient process it is more complicated, this causes that the fault signature that relay protection system is faced there occurs significant changes.Hexi Corridor
750kV power networks as wind-powered electricity generation Transmission Corridor, in addition to power supply has fluctuation feature, due to use ± 800kV extra-high voltage direct-currents
Technology of transmission of electricity, it also has the feature of AC-DC hybrid power grid, and the power electronic equipment that extra-high voltage direct-current transmission is introduced causes electricity
Net transmission line malfunction transient process is increasingly complex, and the duration is longer, and harmonic content is enriched, and relay protection will be brought can not
The influence ignored.Therefore need the AC-DC hybrid power grid relay protection problem for accessing large-scale wind power to carry out in-depth analysis to grind
Study carefully, it is especially desirable to study the relaying configuration scheme of the transmission line of electricity of each voltage class, ensure power network safety operation.
The content of the invention
750kV power networks as the multikilowatt wind power base of Gansu ten million submitting passage, in addition to power supply has stochastic behaviour, by
In will with ± 800kV extra high voltage direct current transmission line paired runnings, its also with AC-DC hybrid power grid feature, along with tool
There is interconnecting ties characteristic（Gansu and Xinjiang Power）, therefore the relaying configuration of 750kV transmission lines of electricity should be considered.When
The power network dorsal part system that circuit is accessed is stronger, and the end is influenceed just smaller by wind-powered electricity generation or direct current, closer to normal grid, now
Can be using the relaying configuration scheme on conventional electrical power lines road；When the dorsal part system that circuit accesses power network is weaker, it is necessary to consider wind-powered electricity generation
Influence with direct current to protecting.
It is an object of the present invention to regarding to the issue above, propose that a kind of wind-powered electricity generation alternating current-direct current accesses the 750kV lines of serial-parallel power grid
Road protection system, to realize ensureing the advantage of power network safety operation.
To achieve the above object, the technical solution adopted by the present invention is：
A kind of wind-powered electricity generation alternating current-direct current accesses the 750kV line protection systems of serial-parallel power grid, and the system configuration is as follows：
Main protection configuration：The high frequency pilot direction constituted using optical fiber differential protective and based on full dose direction or full dose distance
Protection, and time domain or the frequency domain pilot protection that perception differentiates are held based on model using optical-fibre channel configuration；
Back-up protection is configured：Using zero sequence and the distance protection based on full dose；
Phase selection element：Using the phase selection element based on difference current.
Further, the back-up protection configuration, such as transmission line of electricity distance is more long, then protected from linear distance long, and will
It is adjusted for without time limit trips, as the nearly back-up protection of transmission line of electricity.
Further, when the dorsal part system for such as accessing is stronger, phase selection element is using based on voltage and based on full dose distance
Phase selection element.
Further, the phase selection element can not be using the phase selection element based on order components and Sudden Changing Rate.Skill of the invention
Art scheme has the advantages that：
Technical scheme, is reasonably configured by the carrying out to 750kV line systems, to each protection stage
Technical scheme carries out reasonable distribution, has reached the purpose for ensureing power network safety operation.
Below by drawings and Examples, technical scheme is described in further detail.
Brief description of the drawings
Fig. 1 is the trip protection logic block-diagram described in the embodiment of the present invention；
Fig. 2 is 750kV line tripping logic charts.
Specific embodiment
The preferred embodiments of the present invention are illustrated below in conjunction with accompanying drawing, it will be appreciated that preferred reality described herein
Apply example to be merely to illustrate and explain the present invention, be not intended to limit the present invention.
A kind of 750kV line protection systems of wind power integration AC-DC hybrid power grid, the system configuration is as follows：
Main protection configuration：The high frequency pilot direction constituted using optical fiber differential protective and based on full dose direction or full dose distance
Protection, and time domain or the frequency domain pilot protection that perception differentiates are held based on model using optical-fibre channel configuration；
Back-up protection is configured：Using zero sequence and the distance protection based on full dose；
Phase selection element：Using the phase selection element based on difference current.
Main protection configuration：The high frequency pilot direction constituted using optical fiber differential protective and based on full dose direction or full dose distance
Protection, and time domain/frequency domain pilot protection that perception differentiates is held based on model using the configuration of existing optical-fibre channel；
Back-up protection is configured：Using zero sequence and the distance protection based on full dose, it is considered to which transmission line of electricity distance is more long, preferably uses
Linear distance protection long, and adjusted for without time limit trips, as the nearly back-up protection of transmission line of electricity；
Phase selection element：Phase selection element of the selection based on difference current, can use when the dorsal part system for such as accessing is stronger and be based on
Voltage and the phase selection element based on full dose distance, should not be using the phase selection element based on order components and Sudden Changing Rate.
As depicted in figs. 1 and 2, reclosing：750kV transmission lines of electricity should configure reclosing, single-phase using single-phase wavy trajectory
Failure jumps single-phase, overlaps.It is misaligned that any many phase faults jump three-phase；Catastrophe failure such as hand is closed or He Zhong Library line tripping
When lock-reclosing lock, acceleration protection action, lock-reclosing lock.
Pilot protection and linear distance long are protected from the influence of distribution capacity in wherein Fig. 1, can be by circuit actual disposition；
* is marked in figure is or quick distance protection of the configuration based on power frequency phasor matrix beam decomposition algorithm.
Logical symbol in text using OR gate and with door.
Finally it should be noted that：The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention,
Although being described in detail to the present invention with reference to the foregoing embodiments, for a person skilled in the art, it still may be used
Modified with to the technical scheme described in foregoing embodiments, or equivalent is carried out to which part technical characteristic.
All any modification, equivalent substitution and improvements within the spirit and principles in the present invention, made etc., should be included in of the invention
Within protection domain.
Claims (3)
1. a kind of 750kV line protection systems of wind power integration AC-DC hybrid power grid, it is characterised in that the system configuration is such as
Under：
Main protection configuration：Protected using optical fiber differential protective and based on the high frequency pilot direction that full dose direction or full dose distance are constituted
Shield, and time domain or the frequency domain pilot protection that perception differentiates are held based on model using optical-fibre channel configuration；
Back-up protection is configured：Using zero sequence and the distance protection based on full dose；
Phase selection element：Using the phase selection element based on difference current；
When the dorsal part system for such as accessing is stronger, phase selection element is using based on voltage and the phase selection element based on full dose distance.
2. 750kV line protection systems of wind power integration AC-DC hybrid power grid according to claim 1, its feature exists
In the back-up protection configuration, such as transmission line of electricity distance is more long, then protected from linear distance long, and it is without time limit to be adjusted
Tripping operation, as the nearly back-up protection of transmission line of electricity.
3. 750kV line protection systems of wind power integration AC-DC hybrid power grid according to claim 2, its feature exists
In the phase selection element can not be using the phase selection element based on order components and Sudden Changing Rate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410187640.8A CN103986131B (en) | 2014-05-06 | 2014-05-06 | The 750kV line protection systems of wind power integration AC-DC hybrid power grid |
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| CN201410187640.8A CN103986131B (en) | 2014-05-06 | 2014-05-06 | The 750kV line protection systems of wind power integration AC-DC hybrid power grid |
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| CN103986131A CN103986131A (en) | 2014-08-13 |
| CN103986131B true CN103986131B (en) | 2017-05-31 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105119270B (en) * | 2015-07-30 | 2020-02-14 | 国家电网公司 | Analysis method for influence of scale wind power access on longitudinal direction protection |
| CN108599116B (en) * | 2018-04-13 | 2020-05-01 | 国家电网有限公司 | Direct-current line protection method suitable for alternating-current and direct-current hybrid power distribution network |
| CN111009886B (en) * | 2019-11-20 | 2022-04-01 | 金诗瑶 | Remote-set power protection method and device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2175538A2 (en) * | 2000-04-10 | 2010-04-14 | General Electric Company | Improved line current differential protective relaying method and relay for in-zone tapped transformers |
| CN103488873B (en) * | 2013-08-28 | 2016-04-13 | 广东电网公司电力调度控制中心 | A kind of multi-mode hidden fault risk analysis method of relay protection system |
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2014
- 2014-05-06 CN CN201410187640.8A patent/CN103986131B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2175538A2 (en) * | 2000-04-10 | 2010-04-14 | General Electric Company | Improved line current differential protective relaying method and relay for in-zone tapped transformers |
| CN103488873B (en) * | 2013-08-28 | 2016-04-13 | 广东电网公司电力调度控制中心 | A kind of multi-mode hidden fault risk analysis method of relay protection system |
Non-Patent Citations (1)
| Title |
|---|
| 智能变电站站域后备保护原理及实现技术研究;刘益青;《中国博士学位论文全文数据库》;20130515(第5期);第2页至第26页,第84页至第85页，第119页至第122页 * |
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