CN106130054A - A kind of subregion interconnect device - Google Patents
A kind of subregion interconnect device Download PDFInfo
- Publication number
- CN106130054A CN106130054A CN201610509915.4A CN201610509915A CN106130054A CN 106130054 A CN106130054 A CN 106130054A CN 201610509915 A CN201610509915 A CN 201610509915A CN 106130054 A CN106130054 A CN 106130054A
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- China
- Prior art keywords
- voltage source
- source converter
- end voltage
- interconnect device
- connection device
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
-
- 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
- H02H7/268—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 for dc systems
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention provides a kind of subregion interconnect device, including primary equipment and secondary device；Described primary equipment includes sending end voltage source converter, receiving end voltage source converter and DC connection device；Described secondary device includes Control protection system；Described Control protection system controls the properly functioning of sending end voltage source converter, receiving end voltage source converter and the DC connection device in primary equipment.The present invention can realize AC network soft sectoring in the case of not reducing AC system power supply reliability and run, and eliminates electromagnetic looped network.When properly functioning, subregion interconnect device can realize the two-way controlled of electric network swim；In case of a fault, subregion interconnect device can isolate AC fault, and provides reactive power to support for AC system, moreover it is possible to realizes black starting-up, improves AC network power supply reliability.
Description
Technical field
The present invention relates to Technology of HVDC based Voltage Source Converter, be specifically related to a kind of subregion interconnect device.
Background technology
Along with the development of power system, the power of urban distribution network transmission increases rapidly, and urban distribution network must increase builds higher electricity
The power transmission sequence of pressure grade.In the process, electrical network has two typical feature: one is power network development speed, short circuit current
Excessive problem highlights；Two is to there is a large amount of electromagnetic looped network, and ability of supplying electric power is limited.
At the initial stage of high voltage order one power network development, the trend that high and low electromagnetic circle net is passed through is little, and its existence can
Improve electrical network power supply reliability, motility.As long as it is said that in general, not affecting power network safety operation and do not limited by capacity of short circuit
System, can maintain electromagnetic looped network to run.But along with the development of high voltage order one electrical network, transmission load constantly increases, electromagnetic looped network
Become the accident potential that power system is serious.In China's power system, electromagnetic looped network solution inscription of loop has become common recognition, " electric power
Security of system stablizes directive/guide " clear stipulaties, should avoid and eliminate the electricity of the different electric pressures having a strong impact on electricity net safety stable
Magnet ring net, it is ensured that power network safety operation.
At present, eliminate the common mode of electromagnetic looped network and be off being formed the alternating current circuit of electromagnetic looped network, it is achieved AC network
Layering and zoning is run.Although the conventional method of unlinking can solve the short circuit current that loop-net operation brings exceed standard, stability reduction etc.
Problem, but after unlinking there is bigger change in power system operating mode, also reduces AC network operational reliability with flexible simultaneously
Property, it is impossible to realize fast power in emergency circumstances and support.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the present invention provides a kind of subregion interconnect device, can not reduce friendship
Realize AC network soft sectoring in the case of streaming system power supply reliability to run, eliminate electromagnetic looped network.When properly functioning, subregion
Interconnect device can realize the two-way controlled of electric network swim；In case of a fault, subregion interconnect device can isolate AC fault,
And provide reactive power to support for AC system, moreover it is possible to realize black starting-up, improve AC network power supply reliability.
In order to realize foregoing invention purpose, the present invention adopts the following technical scheme that:
The present invention provides a kind of subregion interconnect device, including primary equipment and secondary device；
Described primary equipment includes sending end voltage source converter, receiving end voltage source converter and DC connection device；
Described secondary device includes Control protection system；
Described Control protection system controls the sending end voltage source converter in primary equipment, receiving end voltage source converter and straight
Flow the properly functioning of attachment means.
Described sending end voltage source converter is connected with receiving end voltage source converter by DC connection device.
Described sending end voltage source converter use modularization multi-level converter, cascade two level converters, two level or
Any one in three-level converter.
Described receiving end voltage source converter use modularization multi-level converter, cascade two level converters, two level or
Any one in three-level converter.
Described DC connection device includes the first DC connection device and the second DC connection device.
The positive DC side of described sending end voltage source converter is connected with one end of described first DC connection device, described
The other end of the first DC connection device is connected with the positive DC side of receiving end voltage source converter；Described sending end voltage source converter
The negative DC side of device is connected with one end of the second DC connection device, the other end of described second DC connection device and receiving end
The negative DC side of voltage source converter is connected.
Described first DC connection device and the second DC connection device all include disconnecting switch QS12, grounding switch
QS11, grounding switch QS13, the first spark gap F41, the second spark gap F42, the first voltage transformer TV31, the second mutual induction of voltage
Device TV32, the first current transformer TA71 and the second current transformer TA72.
Described first spark gap F41, the first voltage transformer TV31, grounding switch QS11 parallel connection, composition F41//TV31//
QS11 branch road；
Described second spark gap F42, the second voltage transformer TV32, grounding switch QS13 parallel connection, composition F42//TV32//
QS12 branch road；
Described first current transformer TA71, F41//TV31//QS11 branch road, disconnecting switch QS12, F42//TV32//
QS12 branch road, the second current transformer TA72 series connection.
Described F41//TV31//QS11 branch road one end is simultaneously connected with the first current transformer TA71 and disconnecting switch QS12,
Its other end ground connection；
Described F42//TV32//QS12 branch road one end is simultaneously connected with the second current transformer TA72 and disconnecting switch QS12,
Its other end ground connection.
Described disconnecting switch QS12, grounding switch QS11, grounding switch QS13, the first spark gap F41, the second spark gap
F42, the first voltage transformer TV31, the second voltage transformer TV32, the first current transformer TA71, the second current transformer
TA72 and bus are all enclosed in the grounded metal enclosure being filled with dielectric and arc-extinguishing medium.
Compared with immediate prior art, the technical scheme that the present invention provides has the advantages that
1, Control protection system is for carrying out subregion interconnect device sending end voltage source converter, receiving end voltage source converter
Control protection, use same Control protection system respectively sending end voltage source converter and receiving end voltage source converter independently to be controlled
System, improves the utilization rate of control protective unit, reduces transient overvoltage level, Control protection system can be greatly reduced and ring
Between Ying Shi, improve the dynamic responding speed of Control protection system, save Control protection system and take up an area space, it is achieved that device is whole
The compact designed of body；
2, the subregion interconnect device that the present invention provides not only has possessed all advantages of flexible direct current power transmission system, Er Qiezhi
Stream side eliminates smoothing reactor and uses closed design, carries while significantly reducing the floor space of subregion interconnect device
Rise plant running reliability, it is achieved that the compact designed of primary equipment；
3, the present invention by disconnecting switch QS12, grounding switch QS11, grounding switch QS13, the first spark gap F41, second keep away
Thunder device F42, the first voltage transformer TV31, the second voltage transformer TV32, the first current transformer TA71, the second Current Mutual Inductance
Device TA72 and bus are all enclosed in the grounded metal enclosure being filled with dielectric and arc-extinguishing medium, reduce DC Line Fault and occur
Probability；
4, the subregion interconnect device that the present invention provides realizes exchange in the case of not reducing AC system power supply reliability
Electrical network soft sectoring runs, and eliminates electromagnetic looped network；
5, when properly functioning, the subregion interconnect device that the present invention provides can realize the two-way controlled of electric network swim；
6, in case of a fault, the subregion interconnect device that the present invention provides can isolate AC fault, and is AC system
Offer reactive power supports, moreover it is possible to realize black starting-up, improves AC network power supply reliability.
Accompanying drawing explanation
Fig. 1 is subregion interconnect device topological structure schematic diagram in the embodiment of the present invention；
Fig. 2 is subregion interconnect device Control protection system Organization Chart in prior art；
Fig. 3 is subregion interconnect device Control protection system Organization Chart in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is described in further detail.
Such as Fig. 1, the present invention provides a kind of subregion interconnect device, including primary equipment and secondary device；
Described primary equipment includes sending end voltage source converter, receiving end voltage source converter and DC connection device；
Described secondary device includes Control protection system；
Described Control protection system controls the sending end voltage source converter in primary equipment, receiving end voltage source converter and straight
Flow the properly functioning of attachment means.
Described sending end voltage source converter is connected with receiving end voltage source converter by DC connection device.
Described sending end voltage source converter use modularization multi-level converter, cascade two level converters, two level or
Any one in three-level converter.
Described receiving end voltage source converter use modularization multi-level converter, cascade two level converters, two level or
Any one in three-level converter.
Described DC connection device includes the first DC connection device and the second DC connection device.
The positive DC side of described sending end voltage source converter is connected with one end of described first DC connection device, described
The other end of the first DC connection device is connected with the positive DC side of receiving end voltage source converter；Described sending end voltage source converter
The negative DC side of device is connected with one end of the second DC connection device, the other end of described second DC connection device and receiving end
The negative DC side of voltage source converter is connected.
Described first DC connection device and the second DC connection device all include disconnecting switch QS12, grounding switch
QS11, grounding switch QS13, the first spark gap F41, the second spark gap F42, the first voltage transformer TV31, the second mutual induction of voltage
Device TV32, the first current transformer TA71, the second current transformer TA72.
Described first spark gap F41, the first voltage transformer TV31, grounding switch QS11 parallel connection, composition F41//TV31//
QS11 branch road；
Described second spark gap F42, the second voltage transformer TV32, grounding switch QS13 parallel connection, composition F42//TV32//
QS12 branch road；
Described first current transformer TA71, F41//TV31//QS11 branch road, disconnecting switch QS12, F42//TV32//
QS12 branch road, the second current transformer TA72 series connection.
Described F41//TV31//QS11 branch road one end is simultaneously connected with the first current transformer TA71 and disconnecting switch QS12,
Its other end ground connection；
Described F42//TV32//QS12 branch road one end is simultaneously connected with the second current transformer TA72 and disconnecting switch QS12,
Its other end ground connection.
Described disconnecting switch QS12, grounding switch QS11, grounding switch QS13, the first spark gap F41, the second spark gap
F42, the first voltage transformer TV31, the second voltage transformer TV32, the first current transformer TA71, the second current transformer
TA72 and bus are all enclosed in the grounded metal enclosure being filled with dielectric and arc-extinguishing medium.
Control protection system is for controlling subregion interconnect device sending end voltage source converter, receiving end voltage source converter
System protection, in the prior art, sending end voltage source converter and receiving end voltage source converter control protection system by sending end respectively
System and receiving end Control protection system are the most independently controlled (such as Fig. 2), and floor space is relatively big, and the present invention uses same control
Sending end voltage source converter and receiving end voltage source converter are independently controlled (such as Fig. 3) by protection system respectively, improve control and protect
The utilization rate of protection unit, reduces transient overvoltage level, Control protection system response time can be greatly reduced, improve control
The dynamic responding speed of protection system processed, saves Control protection system and takes up an area space, it is achieved that the compact designed that device is overall.
Subregion interconnect device has not only possessed all advantages of flexible direct current power transmission system but also DC side eliminates flat ripple
Reactor also uses closed design, and improving plant running while significantly reducing the floor space of subregion interconnect device can
By property, it is achieved that the compact designed of primary equipment；The present invention is by disconnecting switch QS12, grounding switch QS11, grounding switch
QS13, the first spark gap F41, the second spark gap F42, the first voltage transformer TV31, the second voltage transformer TV32, the first electricity
Current transformer TA71, the second current transformer TA72 and bus are all enclosed in the grounded metal being filled with dielectric and arc-extinguishing medium
In shell, reduce DC Line Fault probability of happening；The subregion interconnect device that the present invention provides do not reduce that AC system powers can
Run by realizing AC network soft sectoring in the case of property, eliminate electromagnetic looped network；When properly functioning, the subregion that the present invention provides
Interconnect device can realize the two-way controlled of electric network swim；In case of a fault, the subregion interconnect device that the present invention provides is permissible
Isolation AC fault, and provide reactive power to support for AC system, moreover it is possible to realize black starting-up, improve AC network and power reliably
Property.
Finally should be noted that: above example only in order to illustrate that technical scheme is not intended to limit, institute
The those of ordinary skill in genus field still the detailed description of the invention of the present invention can be modified with reference to above-described embodiment or
Equivalent, these are without departing from any amendment of spirit and scope of the invention or equivalent, all await the reply in application this
Within bright claims.
Claims (10)
1. a subregion interconnect device, it is characterised in that described device includes primary equipment and secondary device；
Described primary equipment includes sending end voltage source converter, receiving end voltage source converter and DC connection device；
Described secondary device includes Control protection system；
Described Control protection system controls the sending end voltage source converter in primary equipment, receiving end voltage source converter and direct current even
Connection device properly functioning.
Subregion interconnect device the most according to claim 1, it is characterised in that described sending end voltage source converter passes through direct current
Attachment means is connected with receiving end voltage source converter.
Subregion interconnect device the most according to claim 1 and 2, it is characterised in that described sending end voltage source converter uses
Modularization multi-level converter, cascade in two level converters, two level or three-level converter any one.
Subregion interconnect device the most according to claim 1 and 2, it is characterised in that described receiving end voltage source converter uses
Modularization multi-level converter, cascade in two level converters, two level or three-level converter any one.
Subregion interconnect device the most according to claim 1 and 2, it is characterised in that described DC connection device includes first
DC connection device and the second DC connection device.
Subregion interconnect device the most according to claim 5, it is characterised in that the positive pole of described sending end voltage source converter is straight
Stream side is connected with one end of described first DC connection device, the other end of described first DC connection device and receiving end voltage source
The positive DC side of inverter is connected；The negative DC side of described sending end voltage source converter and the one of the second DC connection device
End is connected, and the other end of described second DC connection device is connected with the negative DC side of receiving end voltage source converter.
Subregion interconnect device the most according to claim 6, it is characterised in that described first DC connection device and second straight
Stream attachment means all include disconnecting switch QS12, grounding switch QS11, grounding switch QS13, the first spark gap F41, second take shelter from the thunder
Device F42, the first voltage transformer TV31, the second voltage transformer TV32, the first current transformer TA71 and the second Current Mutual Inductance
Device TA72.
Subregion interconnect device the most according to claim 7, it is characterised in that described first spark gap F41, the first voltage are mutual
Sensor TV31, grounding switch QS11 are in parallel, form F41//TV31//QS11 branch road；
Described second spark gap F42, the second voltage transformer TV32, grounding switch QS13 parallel connection, form F42//TV32//QS12
Branch road；
Described first current transformer TA71, F41//TV31//QS11 branch road, disconnecting switch QS12, F42//TV32//QS12 prop up
Road, the second current transformer TA72 series connection.
Subregion interconnect device the most according to claim 8, it is characterised in that described F41//TV31//QS11 branch road one end
It is simultaneously connected with the first current transformer TA71 and disconnecting switch QS12, its other end ground connection；
Described F42//TV32//QS12 branch road one end is simultaneously connected with the second current transformer TA72 and disconnecting switch QS12, and it is another
One end ground connection.
Subregion interconnect device the most according to claim 7, it is characterised in that described disconnecting switch QS12, grounding switch
QS11, grounding switch QS13, the first spark gap F41, the second spark gap F42, the first voltage transformer TV31, the second mutual induction of voltage
Device TV32, the first current transformer TA71, the second current transformer TA72 and bus are all enclosed in and are filled with dielectric and arc extinguishing
In the grounded metal enclosure of medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610509915.4A CN106130054A (en) | 2016-06-30 | 2016-06-30 | A kind of subregion interconnect device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610509915.4A CN106130054A (en) | 2016-06-30 | 2016-06-30 | A kind of subregion interconnect device |
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| CN106130054A true CN106130054A (en) | 2016-11-16 |
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| CN201610509915.4A Pending CN106130054A (en) | 2016-06-30 | 2016-06-30 | A kind of subregion interconnect device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110277772A (en) * | 2018-03-14 | 2019-09-24 | 南京南瑞继保电气有限公司 | A kind of Hybrid HVDC system with trouble handling function |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103840479A (en) * | 2013-12-16 | 2014-06-04 | 南方电网科学研究院有限责任公司 | Start control method for VSC-HVDC-based alternating current-direct current parallel system |
| CN105140961A (en) * | 2015-09-11 | 2015-12-09 | 中国能源建设集团广东省电力设计研究院有限公司 | Hybrid direct-current power transmission device used for new energy grid connection and power transmission method thereof |
| CN105703336A (en) * | 2015-12-28 | 2016-06-22 | 国网辽宁省电力有限公司电力科学研究院 | In-station single-phase grounding fault control protection method for bipolar flexible direct current power transmission system |
-
2016
- 2016-06-30 CN CN201610509915.4A patent/CN106130054A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103840479A (en) * | 2013-12-16 | 2014-06-04 | 南方电网科学研究院有限责任公司 | Start control method for VSC-HVDC-based alternating current-direct current parallel system |
| CN105140961A (en) * | 2015-09-11 | 2015-12-09 | 中国能源建设集团广东省电力设计研究院有限公司 | Hybrid direct-current power transmission device used for new energy grid connection and power transmission method thereof |
| CN105703336A (en) * | 2015-12-28 | 2016-06-22 | 国网辽宁省电力有限公司电力科学研究院 | In-station single-phase grounding fault control protection method for bipolar flexible direct current power transmission system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110277772A (en) * | 2018-03-14 | 2019-09-24 | 南京南瑞继保电气有限公司 | A kind of Hybrid HVDC system with trouble handling function |
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