CN105119252B - The method and its device of Ground return and metallic return rapid translating in a kind of pair of 12 pulsating direct current transmission systems - Google Patents
The method and its device of Ground return and metallic return rapid translating in a kind of pair of 12 pulsating direct current transmission systems Download PDFInfo
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- CN105119252B CN105119252B CN201510512913.6A CN201510512913A CN105119252B CN 105119252 B CN105119252 B CN 105119252B CN 201510512913 A CN201510512913 A CN 201510512913A CN 105119252 B CN105119252 B CN 105119252B
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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]
Abstract
The present invention relates to the methods and its device of Ground return and metallic return rapid translating in a kind of double 12 pulsating direct current transmission systems, by the original high-low pressure valve group bypass breaker characteristic of DC transmission system, utilize the short feature of high-low pressure valve group bypass breaker switch off time, in Ground return turns metallic return operating process, first closed high low pressure valve group bypass breaker, metallic return conversion circuit breaker is disconnected again, realizes being switched fast between Ground return and metallic return.
Description
Technical field
The invention belongs to power electronics field, more particularly to greatly returned in a kind of double 12 pulsating direct current transmission systems
The method of line and metallic return rapid translating.
Background technology
There are many method of operation, including bipolar operation, monopolar ground return operation, monopolar metallic returns for DC transmission system
Operation.When a certain pole of direct current is overhauled or is broken down, another pole can by the monopolar ground return method of operation after
Reforwarding row, which greatly enhances the reliabilities of DC transmission system.But long-term Ground return operation has the following disadvantages：
(1) DC current makes transformer generate D.C. magnetic biasing, seriously through AC system transformer neutral point inflow transformer
Influence the normal operation of transformer；
(2) excessive earth current will generate corrosiveness to metal component, pipeline etc. on the way；
(3) excessive earth current will dock circumpolar ecological environment and impact.
So in order to reduce the monopolar ground circuit operation mode run time caused by failure, reduce to system and ecology
Influence, under fault condition, monopolar ground return from the turn monopolar metallic return method of operation be very in DC transmission system
Important.It is not available in no ground pole or earthing pole simultaneously, when monopole locking occurs, then list must be rapidly completed
Conversion of the very big earthed return to monopolar metallic return.
Existing the earth turns metal solution and needs to constitute current path with disconnecting switch using metallic return, due to isolation
The movement speed of switch is slow, and it is second grade to close a floodgate with opening time, it is difficult to realize the rapid translating of Ground return and metallic return.
During conversion, there will be larger earth current, the ecological environment near power equipment around and earthing pole is caused
Undesirable influence.It is not available in no ground pole or earthing pole, if cannot achieve Ground return to metallic return
Rapid translating will cause bipolar locking, reduce the reliability and stability of system.
Invention content
When monopole stoppage in transit occurring the purpose of the present invention is being directed in DC transmission engineering, need to realize Ground return to metal
This problem of the conversion of loop line provides Ground return in a kind of pair of 12 pulsating direct current transmission systems and quickly turns with metallic return
The method changed improves the system reliability and stability of DC transmission engineering, reduces earth current to power equipment around and life
The influence of state environment.
In order to achieve the above object, solution proposed by the present invention has been to provide a kind of double 12 pulsating direct currents transmissions of electricity
The method of Ground return and metallic return rapid translating in system, the DC transmission system include being connected by DC line
Current conversion stations more than both ends or both ends, each current conversion station DC side include neutral bus switch, metallic return conversion open circuit
Device, metallic(return) circuit disconnecting switch, metallic(return) circuit switch and high-low pressure valve group bypass breaker；Wherein, in Ground return and gold
Belong to loop line fast transition process to include the following steps：
S1 is closed the high-low pressure valve group bypass breaker of sending end and receiving end, so that electric current flows through earthing pole all the way
Circuit, another way electric current flow through direct-current polar by the high-low pressure valve group bypass breaker；
S2 disconnects the metallic return conversion circuit breaker, so that electric current is only through direct-current polar；
S3 is closed the metallic(return) circuit disconnecting switch of locking pole, and is closed the metallic(return) circuit switch of sending end, with
So that the metallic(return) circuit switch and then flow direction of the metallic(return) circuit disconnecting switch and sending end of the electric current by locking pole
Direct-current polar；
S4 disconnects the high-low pressure valve group bypass breaker.
Preferably, before S1, further there are following steps：S01, when because of failure or maintenance generation monopole
After locking, the rapid translating for carrying out Ground return and metallic return need to be determined whether, if allowing, enter rapid translating stream
Journey.
Preferably, before S1, further there are following steps：S02, the change of current for disconnecting sending end and means become
Lead-in circuit breaker.
Preferably, double 12 pulsating direct current transmission systems refer to that double 12 pulsation extra-high voltage direct-currents are defeated
Electric system.
The present invention also aims to provide Ground return and metallic return in a kind of pair of 12 pulsating direct current transmission systems
The transposition of rapid translating, double 12 pulsating direct current transmission systems include the both ends or both ends connected by DC line or more
Current conversion station, each current conversion station DC side includes：It is connected between the metallic return of the pole 1 of Ground return, concatenated
The high-low pressure valve group bypass breaker of pole 1 and the neutral bus switch of pole 1；Be connected to the pole 2 of Ground return metallic return it
Between, the neutral bus switch of concatenated 2 high-low pressure valve group bypass breaker of pole and pole 2；Metallic return conversion circuit breaker, setting
On Ground return；Metallic(return) circuit switchs, and is arranged in the neutral bus switch of metallic return conversion circuit breaker Yu pole 1, pole 2
Between sexupara wiretap；Pole 1 is provided with the metallic(return) circuit disconnecting switch of pole 1, and the metal that metallic(return) circuit switch passes through pole 1
Circuit disconnecting switch is connect with the metallic return of pole 1；Pole 2 is provided with the metallic(return) circuit disconnecting switch of pole 2, and metal returns
Way switch is connect by the metallic(return) circuit disconnecting switch of pole 2 with the metallic return of pole 2；Wherein, it is returned in Ground return and metal
Among line fast transition process, when the high-low pressure valve group bypass breaker of sending end and receiving end is in closed state so that all the way
Electric current flows through Ground return, and another way electric current flows through metallic return by the high-low pressure valve group bypass breaker；When the gold
Belong to loop line conversion circuit breaker in off-state so that electric current is only through metallic return；When the metallic(return) circuit isolation of locking pole
The metallic(return) circuit switch of switch and sending end is in closed state, and the high-low pressure valve group bypass breaker is in off-state,
So that the metallic(return) circuit switch and then flow direction of the metallic(return) circuit disconnecting switch and sending end of the electric current by locking pole
Metallic return.
The present invention takes into account the characteristics of extra-high voltage DC transmission system, by the original high-low pressure valve group of extra-high voltage direct-current transmission
By-pass switch realizes that Ground return to the rapid translating of metallic return, greatly reduces DC current by shirtsleeve operation step
Enter the ground time.
The present invention can be carried out quickly turning gold greatly using having DC high-speed switch under the premise of not increasing equipment investment
Category mode is run, and can greatly reduce the time that direct current flows into ground, reduces the influence to peripheral facilities.Simultaneously in no ground pole
Or in the case of earthing pole is not available, the reliability of system can be improved, reduce the probability of bipolar locking, increase the stabilization of system
Property.
Description of the drawings
Fig. 1 be the present invention double 12 pulsating direct current transmission systems in Ground return and metallic return rapid translating method
Operating process schematic diagram；
Fig. 2 be the present invention double 12 pulsating direct current transmission systems in after monopole failure locking current path schematic diagram；
Electricity after Fig. 3 is closed for two station high-low pressure valve group bypass breakers in double 12 pulsating direct current transmission systems of the present invention
Logical circulation road schematic diagram；
Current path after Fig. 4 disconnects for metallic return conversion circuit breaker in double 12 pulsating direct current transmission systems of the present invention
Schematic diagram；
Fig. 5 is fully completed for the conversion of Ground return to metallic return in double 12 pulsating direct current transmission systems of the present invention
Ultimate current access schematic diagram afterwards.
Specific implementation mode
Below with reference to drawings and the specific embodiments, to Ground return in a kind of DC transmission system proposed by the present invention with
The method of metallic return rapid translating is described in detail.
The present embodiment is for double 12 pulsation extra-high voltage DC transmission systems, which includes by direct current
The both ends of connection and current conversion stations more than both ends, each current conversion station DC side include neutral bus switch HSNBS, metal time
Line conversion circuit breaker MRTB, metallic(return) circuit disconnecting switch, metallic(return) circuit switch MRS and high-low pressure valve group bypass breaker BPS
Deng.
In order to realize Ground return to the rapid translating of metallic return, DC transmission system of the invention is using following step
Suddenly：
S01 occurs monopole and is latched and (is latched for pole 1 among the present embodiment, i.e., pole 1 is locking pole) when because of failure or maintenance
Afterwards, DC current sequentially (connects by neutral bus switch HSNBS, metallic return conversion circuit breaker MRTB and ground electrode circuit
Earth polar circuit is Ground return), finally enter ground, as shown in Figure 2；At this point, need to determine whether to carry out Ground return and gold
Belong to the rapid translating of loop line, if allowing, enters rapid translating flow；
S02, the change of current for disconnecting sending end and receiving end become lead-in circuit breaker (not shown)；
S1 is closed the high-low pressure valve group bypass breaker of sending end and receiving end, so that electric current flows through earthing pole all the way
Circuit, another way electric current by the high-low pressure valve group bypass breaker BPS of pole 1 flows through direct-current polar, and (direct-current polar is
Metallic return is simply labeled as " polar curve " among attached drawing)；In other words, DC current is in ground electrode circuit and direct-current polar
Between redistributed, as shown in Figure 3；
S2 disconnects the metallic return conversion circuit breaker MRTB, so that electric current is only through direct-current polar；In other words, it waits for
After electric current is redistributed, the DC current sequentially neutral bus switch HSNBS through pole 1, the high-low pressure valve group bypass breaker of pole 1
BPS flows to the direct-current polar of pole 1, complete Ground return to metallic return rapid translating, as shown in Figure 4；
S3 is closed the metallic(return) circuit disconnecting switch of pole 1, and is closed the metallic(return) circuit switch of sending end, so that
It obtains the metallic(return) circuit switch of the metallic(return) circuit disconnecting switch and sending end of the electric current by locking pole and then flows to directly
Flow polar curve；
S4 disconnects the high-low pressure valve group bypass breaker of pole 1, at this point, DC current is sequentially switched through neutral bus
HSNBS, metallic(return) circuit switch MRS and locking pole metallic(return) circuit disconnecting switch flow to locking pole direct-current polar.It should be understood that
, at this point, also needing the disconnecting switch of disconnection high-low pressure valve group bypass breaker, metallic return conversion circuit breaker.So far, the earth
The conversion of loop line to metallic return is fully completed, as shown in Figure 5.
If among other embodiment, pole 2 is locking pole, the method class of Ground return and metallic return rapid translating
Seemingly, for those skilled in the art can be according to the present invention connotation analogize.
The present invention takes into account the characteristics of extra-high voltage DC transmission system, by the original high-low pressure valve group of extra-high voltage direct-current transmission
Bypass breaker BPS realizes that Ground return to the rapid translating of metallic return, greatly reduces straight by shirtsleeve operation step
Galvanic electricity flows into the ground time, reduces the influence to peripheral facilities.It is not available in no ground pole or earthing pole simultaneously, it can carry
The reliability of high system reduces the probability of bipolar locking, increases the stability of system.
Embodiment described above describe it is more specific and detailed, but can not therefore and be interpreted as to the scope of the claims of the present invention
Limitation.It should be pointed out that for those of ordinary skill in the art, without departing from the inventive concept of the premise,
Various modifications and improvements can be made, these are all within the scope of protection of the present invention.Therefore, the protection domain of patent of the present invention
It should be determined by the appended claims.
Claims (4)
1. a kind of method of Ground return and metallic return rapid translating in double 12 pulsating direct current transmission systems, described double 12
Pulsating direct current transmission system includes the current conversion station at the both ends or both ends connected by DC line or more, it is characterised in that：
Each current conversion station DC side includes:
It is connected to high-low pressure valve group bypass breaker and the pole 1 of between the metallic return of the pole 1 of Ground return, concatenated pole 1
Neutral bus switch；
It is connected between the metallic return of the pole 2 of Ground return, concatenated 2 high-low pressure valve group bypass breaker of pole and pole 2
Neutral bus switchs；
Metallic return conversion circuit breaker is arranged on Ground return；
Metallic(return) circuit switchs, and is arranged and is opened in the neutral bus switch of metallic return conversion circuit breaker with pole 1, the neutral bus of pole 2
Between pass；
Pole 1 is provided with the metallic(return) circuit disconnecting switch of pole 1, and metallic(return) circuit switch is isolated by the metallic(return) circuit of pole 1
Switch is connect with the metallic return of pole 1；
Pole 2 is provided with the metallic(return) circuit disconnecting switch of pole 2, and metallic(return) circuit switch is isolated by the metallic(return) circuit of pole 2
Switch is connect with the metallic return of pole 2；
Wherein, include the following steps in Ground return and metallic return fast transition process：
S1 is closed the high-low pressure valve group bypass breaker of sending end and receiving end, so that electric current flows through ground electrode circuit all the way,
Another way electric current flows through direct-current polar by the high-low pressure valve group bypass breaker；
S2 disconnects the metallic return conversion circuit breaker, so that electric current is only through direct-current polar；
S3 is closed the metallic(return) circuit disconnecting switch of locking pole, and is closed the metallic(return) circuit switch of sending end, so that
The metallic(return) circuit of the electric current by the metallic(return) circuit disconnecting switch and sending end of locking pole switchs and then flows to direct current
Polar curve；
S4 disconnects the high-low pressure valve group bypass breaker.
2. Ground return and metallic return rapid translating in double 12 pulsating direct current transmission systems according to claim 1
Method, which is characterized in that before S1, further there are following steps：S01, after because of failure or maintenance generation monopole locking,
It need to determine whether that the rapid translating for carrying out Ground return and metallic return enters rapid translating flow if allowing.
3. Ground return quickly turns with metallic return in double 12 pulsating direct current transmission systems according to claim 1 or 2
The method changed, which is characterized in that before S1, further there are following steps：S02, disconnect sending end and receiving end the change of current become into
Line breaker.
4. Ground return and metallic return rapid translating in double 12 pulsating direct current transmission systems according to claim 3
Method, which is characterized in that the DC transmission system refers to double 12 pulsation extra-high voltage DC transmission systems.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510512913.6A CN105119252B (en) | 2015-08-20 | 2015-08-20 | The method and its device of Ground return and metallic return rapid translating in a kind of pair of 12 pulsating direct current transmission systems |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510512913.6A CN105119252B (en) | 2015-08-20 | 2015-08-20 | The method and its device of Ground return and metallic return rapid translating in a kind of pair of 12 pulsating direct current transmission systems |
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| Publication Number | Publication Date |
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| CN105119252A CN105119252A (en) | 2015-12-02 |
| CN105119252B true CN105119252B (en) | 2018-09-18 |
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| CN201510512913.6A Active CN105119252B (en) | 2015-08-20 | 2015-08-20 | The method and its device of Ground return and metallic return rapid translating in a kind of pair of 12 pulsating direct current transmission systems |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107979110B (en) * | 2017-10-30 | 2019-08-27 | 南方电网科学研究院有限责任公司 | Metallic return turns control method, device and the transmission system of Ground return |
| EP3561985B1 (en) * | 2018-04-27 | 2023-05-31 | General Electric Technology GmbH | Hvdc transmission schemes |
| CN111244998B (en) * | 2020-01-14 | 2021-11-19 | 南方电网科学研究院有限责任公司 | Control method and device for converting single-pole ground return wire into metal return wire and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0642201A1 (en) * | 1993-09-06 | 1995-03-08 | Siemens Aktiengesellschaft | High voltage direct current transmission system |
| CN203166540U (en) * | 2013-01-22 | 2013-08-28 | 南方电网科学研究院有限责任公司 | Combined type high-voltage direct current transmission system |
| CN204928103U (en) * | 2015-08-20 | 2015-12-30 | 南方电网科学研究院有限责任公司 | Device of big earthed return and metallic return quick switching in two 12 pulsation direct current transmission systems |
-
2015
- 2015-08-20 CN CN201510512913.6A patent/CN105119252B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0642201A1 (en) * | 1993-09-06 | 1995-03-08 | Siemens Aktiengesellschaft | High voltage direct current transmission system |
| CN203166540U (en) * | 2013-01-22 | 2013-08-28 | 南方电网科学研究院有限责任公司 | Combined type high-voltage direct current transmission system |
| CN204928103U (en) * | 2015-08-20 | 2015-12-30 | 南方电网科学研究院有限责任公司 | Device of big earthed return and metallic return quick switching in two 12 pulsation direct current transmission systems |
Non-Patent Citations (1)
| Title |
|---|
| ±800kV云广特高压工程控制保护运行风险及预控措施研究;李扬;《中国优秀硕士学位论文全文数据库 工程科技II辑》;20140515(第5期);第5-15页，第110页 * |
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| CN105119252A (en) | 2015-12-02 |
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