CN100511899C - AC line-feeding deicing connection plan for current-exchanging station - Google Patents
AC line-feeding deicing connection plan for current-exchanging station Download PDFInfo
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- CN100511899C CN100511899C CN 200810084580 CN200810084580A CN100511899C CN 100511899 C CN100511899 C CN 100511899C CN 200810084580 CN200810084580 CN 200810084580 CN 200810084580 A CN200810084580 A CN 200810084580A CN 100511899 C CN100511899 C CN 100511899C
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- ice
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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
- 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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Abstract
A project practical method for thawing ice on an AC incoming line of a HVDC substation is characterized in that a back-to-back converter unit connection is composed of two poles of the HVDC substation; one pole is used as a rectifier, while the other pole is used as an inverter; an AC line is coupled in a pole line of the back-to-back converter unit, so that DC current of the same intensity flows through the AC line as well as the inverter for thawing the ice on the AC line. The experimental method can be used for thawing the ice on the AC incoming line of the HVDC substation. A built DC project can meet the ice-thawing requirement of thawing the ice on the AC incoming line of the HVDC substation through controlling and protecting system reconstruction; and the mode of the back-to-back ice-thawing operation can be added to a new DC project for thawing the ice on the AC incoming line of the HVDC substation.
Description
Technical field
The current conversion station that the present invention relates to a kind of practicality in the DC transmission engineering exchanges the inlet wire de-icing method, exchange the connection plan of inlet wire ice-melt more specifically to a kind of HVDC (High Voltage Direct Current) converter substation, utilize 2 utmost points of HVDC (High Voltage Direct Current) converter substation to constitute convertor unit wiring back-to-back, the polar curve of convertor unit is back-to-back inserted in the alternating current circuit, then the direct current with the identical size of converter will be flow through in the alternating current circuit, can melt the icing of alternating current circuit.The current conversion station that this connection plan can be used for high voltage direct current transmission exchanges the inlet wire ice-melt.For building DC engineering, just can reach the requirement of melting current conversion station alternating current circuit ice-melt by the transformation of control protection system; For newly-built DC engineering, increase the mode of ice melting operation back-to-back of 2 utmost points of current conversion station, can melt the icing that current conversion station exchanges inlet wire.
Background technology
At present in the DC transmission engineering, DC power transmission line under the sleet serious situation, the phenomenon of freezing may occur in the winter time, and own wts such as DC line and transmission tower all can increase greatly.Under the icing serious situation, the pressure that circuit and shaft tower bear surpasses the design limit value, line interruption can occur, shaft tower catastrophic effect such as collapse, make that remote direct current transportation is forced to interrupt, the safe operation of serious threat electric power system, national economy will take a bath.HVDC (High Voltage Direct Current) transmission system generally is used to connect different electrical networks, realizes the high-power grid power transmission of striding of long distance; If because ice and snow weather causes circuit to freeze, cause situations such as aforementioned shaft tower collapses, consequence will be very serious.
From present case, the main means of power network line deice and rush to rescue are still manually stepped on the tower deicing based on traditional, and this method is not only dangerous, and efficient is not high, is the remedial measure afterwards of doing something against one's will.To fundamentally improve the anti-ice damage ability of transmission line, must be from design and technical starting with.
From designing consideration, the anti-ice intensity of line feeder line pole tower is a direct way, but must consider the economical rationality sexual factor of line construction and operation, can not infinitely strengthen.For the circuit of having built, to change shaft tower again and mean the transformation reinforcing that need spend a large amount of funds to be used for old circuit, the human and material resources of transformation and financial resources are limited after all.
Therefore, practical ways are to start with from the new technology of operation of power networks, by studying the de-icing technology that means such as reasonable change power system operating mode and increase deicer fundamentally break through domestic 500kV and above circuit.
It is exactly the characteristic that makes full use of HVDC (High Voltage Direct Current) converter substation converter itself that current conversion station exchanges inlet wire ice-melt converter wiring scheme, provides and melts a kind of effective connection plan that current conversion station exchanges the direct current of inlet wire icing.
For building DC engineering, just can reach the requirement of melting current conversion station alternating current circuit ice-melt by the transformation of control protection system; For newly-built DC engineering, increase the mode of ice melting operation back-to-back of 2 utmost points of current conversion station, can melt the icing that current conversion station exchanges inlet wire.
Summary of the invention
The object of the present invention is to provide a kind of effective ways of thawing current conversion station interchange inlet wire circuit icing of practicality.When the current conversion station alternating current circuit needs ice-melt; the direct current transportation operational mode of at first stopping transport; 2 utmost points of current conversion station are connected into the back-to-back converter substation wiring; one of them utmost point is as converting plant; another utmost point is as Inverter Station; the polar curve of convertor unit is back-to-back inserted in the alternating current circuit; constitute back-to-back DC system ice melting operation mode; the control protection system switches to the back-to-back DC control mode; the release converter; the direct current with the identical size of converter will be flow through in the alternating current circuit, just can control ice melting current by the control direct current, satisfy the requirement of line ice-melting.The current conversion station that this connection plan can be used for high voltage direct current transmission exchanges the inlet wire ice-melt.For building DC engineering, just can reach the requirement of melting current conversion station alternating current circuit ice-melt by the transformation of control protection system; For newly-built DC engineering, increase the mode of ice melting operation back-to-back of 2 utmost points of current conversion station, can melt the icing that current conversion station exchanges inlet wire.
Description of drawings
Accompanying drawing 1 illustrates current conversion station and exchanges inlet wire ice-melt wiring rough schematic view.Wherein each Reference numeral is expressed as: (1) ac bus; (2) converter transformer; (3) converter valve; (4) smoothing reactor; (5) DC filter; (6) by DC ice-melting; (7) the earth.
Embodiment
At still there not being at present the problem that current conversion station exchanges the measure of inlet wire line ice-melting, the present invention proposes a kind of converter wiring scheme (referring to accompanying drawing 1, accompanying drawing 2) that exchanges the inlet wire line ice-melting with practical current conversion station.The direct current transportation operational mode of at first stopping transport; 2 utmost points of current conversion station are connected into the back-to-back converter substation wiring; one of them utmost point is as converting plant; another utmost point is as Inverter Station; the polar curve of convertor unit is back-to-back inserted in the alternating current circuit; constitute back-to-back DC system ice melting operation mode; the control protection system switches to the back-to-back DC control mode; the release converter; the direct current with the identical size of converter will be flow through in the alternating current circuit; just can control ice melting current by the control direct current, satisfy the requirement of line ice-melting.
The current conversion station that adopts this connection plan to can be used for high voltage direct current transmission exchanges the inlet wire ice-melt.For building DC engineering, just can reach the requirement of melting current conversion station alternating current circuit ice-melt by the transformation of control protection system; For newly-built DC engineering, increase the mode of ice melting operation back-to-back of 2 utmost points of current conversion station, can melt the icing that current conversion station exchanges inlet wire.
Claims (2)
1, a kind of HVDC (High Voltage Direct Current) converter substation exchanges the mode of connection of inlet wire ice-melt, it is characterized in that: 2 utmost points of an end of HVDC (High Voltage Direct Current) converter substation are constituted convertor unit wiring back-to-back, the alternating current circuit is inserted between the polar curve of convertor unit back-to-back, allow the alternating current circuit flow through direct current with the identical size of converter, to melt the icing of alternating current circuit.
2; mode of connection as claimed in claim 1; it is characterized in that: when the current conversion station alternating current circuit needs ice-melt; the direct current transportation operational mode of at first stopping transport; 2 utmost points of one end of current conversion station are connected into the back-to-back converter substation wiring; one of them utmost point is as converting plant; another utmost point is as Inverter Station; need the alternating current circuit of ice-melt to insert between the direct-current polar; constitute back-to-back DC system ice melting operation mode; the control protection system of switching current conversion station is to the back-to-back DC control mode; the release converter with the control ice melting current, satisfies the requirement of line ice-melting by the control direct current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810084580 CN100511899C (en) | 2008-04-09 | 2008-04-09 | AC line-feeding deicing connection plan for current-exchanging station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810084580 CN100511899C (en) | 2008-04-09 | 2008-04-09 | AC line-feeding deicing connection plan for current-exchanging station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101325322A CN101325322A (en) | 2008-12-17 |
| CN100511899C true CN100511899C (en) | 2009-07-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810084580 Expired - Fee Related CN100511899C (en) | 2008-04-09 | 2008-04-09 | AC line-feeding deicing connection plan for current-exchanging station |
Country Status (1)
| Country | Link |
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| CN (1) | CN100511899C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101794977A (en) * | 2010-03-18 | 2010-08-04 | 华北电力大学 | Long-distance transmission line deicing method and device |
| CN101825670A (en) * | 2010-01-15 | 2010-09-08 | 中国南方电网有限责任公司电网技术研究中心 | Closed-loop test system of DC de-icing device control protection system and test method thereof |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101552443B (en) * | 2008-12-30 | 2011-08-31 | 国家电网公司 | Method for melting ice of dipolar direct current transmission line |
| CN101752874B (en) * | 2010-01-25 | 2012-08-08 | 株洲变流技术国家工程研究中心有限公司 | Movable electricity transmission method based on turn-off device |
| CN101882774B (en) * | 2010-03-30 | 2012-09-26 | 南方电网科学研究院有限责任公司 | Direct-current ice melting device without special rectifier transformer and protection method thereof |
| CN103181070B (en) * | 2010-10-28 | 2016-06-29 | Abb技术有限公司 | Control of Voltage in direct current power system |
| BR112013014380B1 (en) * | 2010-12-09 | 2020-10-20 | State Grid Corporation Of China | cascading converter station and cascading multiterminal hvdc power transmission system |
| CN102684129A (en) * | 2012-06-01 | 2012-09-19 | 湖南省电力公司科学研究院 | Ice melting system capable of switching AC between DC |
| CN104078968A (en) * | 2014-07-10 | 2014-10-01 | 南京南瑞继保电气有限公司 | Direct-current transmission channel formed by transforming three-phase alternating current transmission cable |
| CN105958851B (en) * | 2016-05-17 | 2019-06-28 | 中国能源建设集团广东省电力设计研究院有限公司 | The charging method of converter station and commutation system and its inverter |
| CN109813995A (en) * | 2019-01-25 | 2019-05-28 | 中国南方电网有限责任公司超高压输电公司大理局 | Converter station ice melting system converter valve low pressure triggers tester |
| CN112165024A (en) * | 2020-09-03 | 2021-01-01 | 常州博瑞电力自动化设备有限公司 | Water-cooling box type movable ice melting device |
| CN113036800B (en) * | 2021-05-06 | 2023-05-23 | 贵州电网有限责任公司 | Flexible interconnection substation structure and control method |
| CN113471918B (en) * | 2021-06-28 | 2022-12-13 | 南京南瑞继保电气有限公司 | Ice melting circuit of extra-high voltage direct-current transmission system and control method and control device thereof |
-
2008
- 2008-04-09 CN CN 200810084580 patent/CN100511899C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825670A (en) * | 2010-01-15 | 2010-09-08 | 中国南方电网有限责任公司电网技术研究中心 | Closed-loop test system of DC de-icing device control protection system and test method thereof |
| CN101794977A (en) * | 2010-03-18 | 2010-08-04 | 华北电力大学 | Long-distance transmission line deicing method and device |
| CN101794977B (en) * | 2010-03-18 | 2013-05-01 | 华北电力大学 | Long-distance transmission line deicing method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101325322A (en) | 2008-12-17 |
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Addressee: State Grid DC Project Construction Co., Ltd. Zhang Min Document name: Notification to Pay the Fees |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090708 Termination date: 20120409 |