CN109687495A - Series-connection multi-terminal direct current system converter station is grounded polar circuit and its control method - Google Patents
Series-connection multi-terminal direct current system converter station is grounded polar circuit and its control method Download PDFInfo
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- CN109687495A CN109687495A CN201710991963.6A CN201710991963A CN109687495A CN 109687495 A CN109687495 A CN 109687495A CN 201710991963 A CN201710991963 A CN 201710991963A CN 109687495 A CN109687495 A CN 109687495A
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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
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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
The present invention discloses a kind of series-connection multi-terminal direct current system converter station ground connection polar circuit, and the equipment that can open and block circuit by by-pass knife switch or breaker etc. realizes the switching of converter station earthing mode among series-connection multi-terminal direct current system.Invention additionally discloses a kind of control methods of series-connection multi-terminal direct current ground connection polar circuit.Such technical solution can realize that series-connection multi-terminal direct current system is stopped transport in any converter station, and any earthing pole maintenance avoids remaining series connection multi-terminal system that forced outage partially or completely occurs when any DC line overhauls.
Description
Technical field
The invention belongs to series-connection multi-terminal direct current field, including the series connection of classical tandem multi-terminal HVDC transmission, extra-high voltage are more
Hold direct current transportation, mixing series-connection multi-terminal direct current and crossfire Multi-end flexible direct current transmission, in particular to a kind of series connection multiterminal
D. C. Electric transmission earthed pole circuit and its control method.
Background technique
With the development of HVDC Transmission Technology, multi-terminal HVDC transmission technology starts gradually to be studied by skilled addressee,
Wherein multi-terminal HVDC transmission is divided into multi-terminal HVDC transmission technology in parallel and series-connection multi-terminal direct current transmission of electricity, and series-parallel mixing
Multi-terminal HVDC transmission technology.Wherein series-connection multi-terminal direct current technology is due to advantage possessed in terms of insulation, by scientific research
Personnel study more and more, and have the trend of engineering.
Series-connection multi-terminal direct current system, as the term suggests the inverter for being exactly each station is to pass through DC power transmission line
It strings together, a part of the inherently entire direct current transportation current loop of inverter.Since intermediate converter station is to be serially connected in be
Among system, therefore intermediate converter station cannot be grounded when operating normally.But when the damage of the earthing pole of side converter station or side are changed
Because failure is stopped transport, the DC power transmission line stoppage in transit also or with side converter station connecting can all lead to multiterminal system of entirely connecting at stream station
The forfeiture of system current loop is so that lead to the stoppage in transit of entirely series connection multi-terminal system, and this greatly reduces series connection multiterminal element is defeated
The reliability and ability to transmit electricity of electric system.Therefore the series-connection multi-terminal direct current system earth polar circuit and fortune of high usage are studied
Line mode has vital effect to the reliability and ability to transmit electricity that improve series-connection multi-terminal direct current system.
However the research of series-connection multi-terminal direct current technology is focused on more at present in terms of main circuit, control and protection, it is right
The research of series-connection multi-terminal direct current system earth polar circuit is involved not yet.Chinese patent 201210264076.6 proposes
When side converter station is faulty out of service, converter station all equipment in failure side is thoroughly isolated, and with being in and Bian Huanliu
(centre rectification converter station substitution side rectifies converter station, intermediate inversion converter station to the intermediate converter station substitution for identical operational mode of standing
Substitute side inversion converter station).And it is also pointed out the earthing pole method that side converter station is replaced with the earthing pole of intermediate converter station.It should
Patent limitation is very strong, specific as follows: 1) premise of the patent exploitation is in operational mode identical as side converter station
Between converter station substitute failure side converter station, if being not on the intermediate converter station of identical operational mode, entirely connect it is more
Hold DC transmission system still can failure stoppage in transit；2) patent needs to exit the one of the other side when side converter station is out of service
A converter station may be only available for the series-connection multi-terminal direct current system at four ends or more, and it is defeated to be not applied for three end series direct currents
Electric system；3) intermediate because intermediate converter station does not need to be grounded when operating normally in series-connection multi-terminal direct current field
The earthing pole through-current capability of converter station configuration is limited, can only play a part of to provide voltage reference points.Work as series-connection multi-terminal direct current
When the running current at system the two poles of the earth is inconsistent, has high current and flow through the earthing pole of intermediate converter station, and then earthing pole is caused to damage
Badly cause entire series-connection multi-terminal direct current system shutdown.The obvious patent can not be applicable in series-connection multi-terminal direct current monopole
The earth operational mode；4) this does not have patent not propose any specific ground connection polar circuit；5) patent does not utilize failure side to change
Flow the earthing pole at station.
In conclusion the research of series-connection multi-terminal direct current system earth polar circuit is considerably less at present, only mention on side
Intermediate converter station can be converted to converter station operation in side when change of current station failure, and bipolar balance fortune can only be operated in after converting
Under row mode, there is significant limitation.
Summary of the invention
The purpose of the present invention is to provide a kind of series-connection multi-terminal direct current system converter station ground connection polar circuit and its control
Method can realize that series-connection multi-terminal direct current system is stopped transport in any converter station, any earthing pole maintenance, any DC line
When maintenance, avoid remaining series connection multi-terminal system that forced outage partially or completely occurs.
In order to achieve the above objectives, solution of the invention is:
A kind of series-connection multi-terminal direct current system converter station ground connection polar circuit, including a Ge Bian converting plant, one or one
A above intermediate converter station and a side Inverter Station；
Side converting plant is opened including the 11st direct current and is opened and blocking equipment (S2) with blocking equipment (S1), the 12nd direct current
And the 13rd direct current open with blocking equipment (S3), the 11st direct current, which is opened, to be opened and blocks with blocking equipment, the 12nd direct current
After equipment is connected in series, the 11st direct current, which is opened, flanks one article of DC line with the another of blocking equipment, and the 12nd direct current is open-minded
Another with blocking equipment flanks an other DC line, opens in the 11st direct current and opens with blocking equipment, the 12nd direct current
All earthing poles of side converting plant are accessed in logical and blocking equipment series connection wire, while the 13rd is accessed in series connection wire
Direct current is opened and blocking equipment, and the 13rd direct current, which is opened, to be connected with another flank of blocking equipment in side converting plant the two poles of the earth inverter
On line；
Intermediate converter station includes that the first direct current is opened and blocking equipment (SR1), the second direct current is opened and blocking equipment
(SR2), third direct current open opened with blocking equipment (SR3), the 4th direct current opened with blocking equipment (SI1), the 5th direct current and
Blocking equipment (SI2), the 6th direct current are opened to be opened with blocking equipment (SL1), the 8th directly with blocking equipment (SI3), the 7th direct current
Stream is opened to be opened and blocking equipment (SL3) and the tenth direct current is opened and blocking equipment with blocking equipment (SL2), the 9th direct current
(SL4), the first direct current is opened to open with blocking equipment, the second direct current and is connected in series with blocking equipment, and the 4th direct current is opened and hindered
Disconnected equipment, the 5th direct current are opened to be connected in series with blocking equipment, and third direct current, which is opened, to be opened and hinder with blocking equipment, the 6th direct current
Disconnected equipment is connected in series, and third direct current is opened to be opened and blocking equipment, second with the other side of blocking equipment the first direct current of access
Direct current is opened in blocking equipment series connection wire, and the 6th direct current is opened open-minded with the other side of blocking equipment the 4th direct current of access
It opens with blocking equipment, the 5th direct current in blocking equipment series connection wire, the earthing pole equipment of intermediate converter station accesses third
Direct current open with blocking equipment, the 6th direct current open in blocking equipment series connection wire, the 7th direct current open with blocking equipment,
8th direct current is opened to open with blocking equipment, the 9th direct current and opens and connect respectively with blocking equipment with blocking equipment, the tenth direct current
Between one DC power transmission line and intermediate converter station inverter, the first direct current, which is opened, to be flanked with the another of blocking equipment the 7th
Direct current is opened in blocking equipment and intermediate converter station inverter series connection wire, and the second direct current is opened another with blocking equipment
It flanks and opens in the 8th direct current in blocking equipment and intermediate converter station inverter series connection wire, third direct current is opened and blocked
Equipment it is another flank the 9th direct current open in blocking equipment and intermediate converter station inverter series connection wire, the 4th direct current
It opens and is opened and blocking equipment and intermediate converter station inverter series connection wire with another flank of blocking equipment in the tenth direct current
On；
Side Inverter Station is opened including the 14th direct current and is opened and blocking equipment (S5) with blocking equipment (S4), the 15th direct current
And the 16th direct current open with blocking equipment (S6), the 14th direct current, which is opened, to be opened and blocks with blocking equipment, the 15th direct current
After equipment is connected in series, the 14th direct current, which is opened, flanks one article of DC line with the another of blocking equipment, and the 15th direct current is open-minded
Another with blocking equipment flanks an other DC line, opens in the 14th direct current and opens with blocking equipment, the 15th direct current
All earthing poles of side Inverter Station are accessed in logical and blocking equipment series connection wire, while the 16th is accessed in series connection wire
Direct current is opened and blocking equipment, and the 16th direct current, which is opened, to be connected with another flank of blocking equipment in side Inverter Station the two poles of the earth inverter
On line.
Above-mentioned each direct current is opened with blocking equipment using by-pass knife switch or breaker.
A kind of control method of foregoing series-connection multi-terminal direct current system converter station ground connection polar circuit, control ground connection
Polar circuit works in conventional operation mode, and control program is: the 11st direct current open opened with blocking equipment, the 12nd direct current and
Blocking equipment is all in blocking state, and the 13rd direct current, which is opened, is in opening state with blocking equipment, and the first direct current is opened and hindered
Disconnected equipment, the second direct current open with blocking equipment, third direct current open with blocking equipment, the 4th direct current open with blocking equipment,
5th direct current, which is opened, to be opened with blocking equipment with blocking equipment, the 6th direct current all in blocking state, and the 7th direct current is opened and hindered
Disconnected equipment, the 8th direct current are opened to be opened and blocking equipment and the tenth direct current is opened and blocking is set with blocking equipment, the 9th direct current
Standby to be in opening state, the 14th direct current, which is opened, to be opened with blocking equipment with blocking equipment, the 15th direct current all in blocking shape
State, the 16th direct current, which is opened, is in opening state with blocking equipment.
A kind of control method of foregoing series-connection multi-terminal direct current system converter station ground connection polar circuit, control ground connection
Polar circuit works in intermediate converter station and is switched to the side converting plant method of operation, using one of scheme control as follows:
The first control program: the first direct current is opened to be opened and blocking equipment, third direct current with blocking equipment, the second direct current
It opens to open to open with blocking equipment and the tenth direct current with blocking equipment, the 9th direct current and is in opening state with blocking equipment,
4th direct current is opened to open with blocking equipment, the 5th direct current and be opened and blocking equipment, the 7th direct current with blocking equipment, the 6th direct current
Open and open with blocking equipment with blocking equipment, the 8th direct current all in blocking state, the 14th direct current open with blocking equipment,
15th direct current is opened with blocking equipment all in blocking state, and the 16th direct current, which is opened, is in opening state with blocking equipment；
Second of control program: the 12nd direct current is opened and blocking equipment, the 13rd direct current is opened and blocking equipment is all located
In blocking state, the 11st direct current, which is opened, is in opening state with blocking equipment, and the first direct current is opened with blocking equipment, second directly
Stream is opened to open with blocking equipment, the 7th direct current and opens and open with blocking equipment and the tenth direct current with blocking equipment, the 9th direct current
Logical and blocking equipment is in opening state, and third direct current is opened to be opened with blocking equipment, the 5th directly with blocking equipment, the 4th direct current
Stream is opened to open with blocking equipment, the 6th direct current and be opened with blocking equipment with blocking equipment, the 8th direct current all in blocking state,
14th direct current, which is opened, to be opened with blocking equipment with blocking equipment, the 15th direct current all in blocking state, and the 16th direct current is opened
Logical and blocking equipment is in opening state；
The third control program: the 11st direct current is opened and blocking equipment, the 13rd direct current is opened and blocking equipment is all located
In blocking state, the 12nd direct current, which is opened, is in opening state with blocking equipment, and the first direct current is opened with blocking equipment, second directly
Stream is opened to open with blocking equipment, the 8th direct current and opens and open with blocking equipment and the tenth direct current with blocking equipment, the 9th direct current
Logical and blocking equipment is in opening state, and third direct current is opened to be opened with blocking equipment, the 5th directly with blocking equipment, the 4th direct current
Stream is opened to open with blocking equipment, the 6th direct current and be opened with blocking equipment with blocking equipment, the 7th direct current all in blocking state,
14th direct current, which is opened, to be opened with blocking equipment with blocking equipment, the 15th direct current all in blocking state, and the 16th direct current is opened
Logical and blocking equipment is in opening state；
4th kind of control program: the 11st direct current is opened and blocking equipment, the 12nd direct current is opened and blocking equipment is all located
In opening state, the 13rd direct current, which is opened, is in blocking state with blocking equipment, and the first direct current is opened with blocking equipment, second directly
Stream open opened with blocking equipment, the 7th direct current opened with blocking equipment, the 8th direct current opened with blocking equipment, the 9th direct current and
Blocking equipment and the tenth direct current, which are opened, is in opening state with blocking equipment, and third direct current is opened with blocking equipment, the 4th directly
Stream is opened to open with blocking equipment, the 5th direct current and be opened with blocking equipment with blocking equipment, the 6th direct current all in blocking state,
14th direct current, which is opened, to be opened with blocking equipment with blocking equipment, the 15th direct current all in blocking state, and the 16th direct current is opened
Logical and blocking equipment is in opening state；
5th kind of control program: the 11st direct current is opened and blocking equipment, the 12nd direct current is opened and blocking equipment is all located
In opening state, the 13rd direct current, which is opened, is in blocking state with blocking equipment, and the first direct current is opened with blocking equipment, second directly
Stream open opened with blocking equipment, third direct current opened with blocking equipment, the 4th direct current opened with blocking equipment, the 5th direct current and
Blocking equipment, the 6th direct current are opened with blocking equipment all in blocking state, and the 7th direct current is opened and blocking equipment, the 8th direct current
It opens to open to open with blocking equipment and the tenth direct current with blocking equipment, the 9th direct current and is in opening state with blocking equipment,
14th direct current, which is opened, to be opened with blocking equipment with blocking equipment, the 15th direct current all in blocking state, and the 16th direct current is opened
Logical and blocking equipment is in opening state.
A kind of control method of foregoing series-connection multi-terminal direct current system converter station ground connection polar circuit, control ground connection
Polar circuit works in intermediate converter station and is switched to the side Inverter Station method of operation, using one of scheme control as follows:
The first control program: the 11st direct current is opened and blocking equipment, the 12nd direct current is opened and blocking equipment is all located
In blocking state, the 13rd direct current, which is opened, is in opening state with blocking equipment, and the first direct current is opened with blocking equipment, second directly
Stream is opened to open with blocking equipment, third direct current and opens and open with blocking equipment and the tenth direct current with blocking equipment, the 9th direct current
Logical and blocking equipment is in blocking state, and the 4th direct current is opened to be opened with blocking equipment, the 6th directly with blocking equipment, the 5th direct current
Stream is opened to open with blocking equipment, the 7th direct current and be opened with blocking equipment with blocking equipment, the 8th direct current all on state；
Second of control program: the 11st direct current is opened and blocking equipment, the 12nd direct current is opened and blocking equipment is all located
In blocking state, the 13rd direct current, which is opened, is in opening state with blocking equipment, and the 4th direct current is opened with blocking equipment, the 5th directly
Stream is opened to open with blocking equipment, the 7th direct current and opens and open with blocking equipment and the 9th direct current with blocking equipment, the 8th direct current
Logical and blocking equipment is in opening state, the first direct current open opened with blocking equipment, the second direct current it is straight with blocking equipment, third
Stream is opened to open with blocking equipment, the 6th direct current and be opened with blocking equipment with blocking equipment, the tenth direct current all in blocking state,
15th direct current, which is opened, to be opened with blocking equipment with blocking equipment, the 16th direct current all in blocking state, and the 14th direct current is opened
Logical and blocking equipment is in opening state；
The third control program: the 11st direct current is opened and blocking equipment, the 12nd direct current is opened and blocking equipment is all located
In blocking state, the 13rd direct current, which is opened, is in opening state with blocking equipment, and the 4th direct current is opened with blocking equipment, the 5th directly
Stream is opened to open with blocking equipment, the 7th direct current and opens and open with blocking equipment and the tenth direct current with blocking equipment, the 8th direct current
Logical and blocking equipment is in opening state, the first direct current open opened with blocking equipment, the second direct current it is straight with blocking equipment, third
Stream is opened to open with blocking equipment, the 6th direct current and be opened with blocking equipment with blocking equipment, the 9th direct current all in blocking state,
14th direct current, which is opened, to be opened with blocking equipment with blocking equipment, the 16th direct current all in blocking state, and the 15th direct current is opened
Logical and blocking equipment is in opening state；
4th kind of control program: the 11st direct current is opened and blocking equipment, the 12nd direct current is opened and blocking equipment is all located
In blocking state, the 13rd direct current, which is opened, is in opening state with blocking equipment, and the 4th direct current is opened with blocking equipment, the 5th directly
Stream open opened with blocking equipment, the 7th direct current opened with blocking equipment, the 8th direct current opened with blocking equipment, the 9th direct current and
Blocking equipment and the tenth direct current, which are opened, is in opening state with blocking equipment, and the first direct current is opened with blocking equipment, second directly
Stream is opened to open with blocking equipment, third direct current and be opened with blocking equipment with blocking equipment, the 6th direct current all in blocking state,
14th direct current, which is opened, opens that be in opening state, the 16th direct current with blocking equipment open-minded with blocking equipment, the 15th direct current
Blocking state is in blocking equipment；
5th kind of control program: the 11st direct current is opened and blocking equipment, the 12nd direct current is opened and blocking equipment is all located
In blocking state, the 13rd direct current, which is opened, is in opening state with blocking equipment, and the first direct current is opened with blocking equipment, second directly
Stream open opened with blocking equipment, third direct current opened with blocking equipment, the 4th direct current opened with blocking equipment, the 5th direct current and
Blocking equipment, the 6th direct current are opened with blocking equipment all in blocking state, and the 7th direct current is opened and blocking equipment, the 8th direct current
It opens to open to open with blocking equipment and the tenth direct current with blocking equipment, the 9th direct current and is in opening state with blocking equipment,
14th direct current, which is opened, opens that be in opening state, the 16th direct current with blocking equipment open-minded with blocking equipment, the 15th direct current
Blocking state is in blocking equipment.
A kind of control method of foregoing series-connection multi-terminal direct current system converter station ground connection polar circuit, control ground connection
Polar circuit works in the intermediate converter station stoppage in transit method of operation, and control program is: the 11st direct current is opened and blocking equipment, the tenth
Two direct currents are opened with blocking equipment all in blocking state, and the 13rd direct current, which is opened, is in opening state with blocking equipment, and first
Direct current open opened with blocking equipment, the second direct current opened with blocking equipment, third direct current it is open-minded with blocking equipment, the 4th direct current
It opens with blocking equipment, the 5th direct current and is opened and blocking equipment, the 7th direct current is opened and blocking is set with blocking equipment, the 6th direct current
Standby, the 8th direct current open with blocking equipment, the 9th direct current open with blocking equipment and the tenth direct current open at blocking equipment
In opening state, the 14th direct current, which is opened to open with blocking equipment, the 15th direct current, is in blocking state, the tenth with blocking equipment
Six direct currents, which are opened, is in opening state with blocking equipment.
After adopting the above scheme, ground connection polar circuit proposed by the present invention and its various methods of operation can guarantee series connection multiterminal system
System is stopped transport in any converter station, and any earthing pole maintenance continues to operate in various works steadily in the long term when any DC line overhauls
Under condition, to farthest improve series connection multi-terminal system reliability and ability to transmit electricity.In addition the bipolar inverter of intermediate converter station
Two sides be configured with and open and blocking equipment, so as to allow intermediate converter station to change original operational mode, such as from rectification
Mode is converted into inverter mode, and which greatly enhances the reliability of series-connection multi-terminal direct current system and ability to transmit electricities.
Detailed description of the invention
Fig. 1 is electrical block diagram of the invention；
Fig. 2 is the conventional operation schematic diagram of series-connection multi-terminal direct current system earth pole；
Fig. 3 is that converter station is switched to one schematic diagram of the side converting plant method of operation among series-connection multi-terminal direct current system；
Fig. 4 is that converter station is switched to two schematic diagram of the side converting plant method of operation among series-connection multi-terminal direct current system；
Fig. 5 is that converter station is switched to three schematic diagram of the side converting plant method of operation among series-connection multi-terminal direct current system；
Fig. 6 is that converter station is switched to four schematic diagram of the side converting plant method of operation among series-connection multi-terminal direct current system；
Fig. 7 is that converter station is switched to five schematic diagram of the side converting plant method of operation among series-connection multi-terminal direct current system；
Fig. 8 is that converter station is switched to one schematic diagram of the side Inverter Station method of operation among series-connection multi-terminal direct current system；
Fig. 9 is that converter station is switched to two schematic diagram of the side Inverter Station method of operation among series-connection multi-terminal direct current system；
Figure 10 is that converter station is switched to three schematic diagram of the side Inverter Station method of operation among series-connection multi-terminal direct current system；
Figure 11 is that converter station is switched to four schematic diagram of the side Inverter Station method of operation among series-connection multi-terminal direct current system；
Figure 12 is that converter station is switched to five schematic diagram of the side Inverter Station method of operation among series-connection multi-terminal direct current system；
Figure 13 is method of operation schematic diagram when converter station is stopped transport among series-connection multi-terminal direct current system.
Specific embodiment
Below with reference to attached drawing, technical solution of the present invention is described in detail.
As shown in Figure 1, the present invention provides a kind of series-connection multi-terminal direct current system converter station ground connection polar circuit, including following
Open and blocking equipment: side converting plant includes that the 11st direct current is opened and opens and block with blocking equipment (S1), the 12nd direct current
Equipment (S2) and the 13rd direct current open with blocking equipment (S3), the 11st direct current is opened to be opened with blocking equipment, the 12nd direct current
After logical and blocking equipment is connected in series, the 11st direct current, which is opened, flanks one article of DC line with the another of blocking equipment, and the 12nd
Direct current, which is opened, flanks an other DC line with the another of blocking equipment, opens and blocking equipment, the tenth in the 11st direct current
Two direct currents are opened and access all earthing poles of side converting plant in blocking equipment series connection wire, while connecing in series connection wire
Enter the 13rd direct current to open and blocking equipment, the 13rd direct current, which is opened, to be changed with another flank of blocking equipment at side converting plant the two poles of the earth
It flows on device connecting line；
Intermediate converter station includes that the first direct current is opened and blocking equipment (SR1), the second direct current is opened and blocking equipment
(SR2), third direct current open opened with blocking equipment (SR3), the 4th direct current opened with blocking equipment (SI1), the 5th direct current and
Blocking equipment (SI2), the 6th direct current are opened to be opened with blocking equipment (SL1), the 8th directly with blocking equipment (SI3), the 7th direct current
Stream is opened to be opened and blocking equipment (SL3) and the tenth direct current is opened and blocking equipment with blocking equipment (SL2), the 9th direct current
(SL4), the first direct current is opened to open with blocking equipment, the second direct current and is connected in series with blocking equipment, and the 4th direct current is opened and hindered
Disconnected equipment, the 5th direct current are opened to be connected in series with blocking equipment, and third direct current, which is opened, to be opened and hinder with blocking equipment, the 6th direct current
Disconnected equipment is connected in series, and third direct current is opened to be opened and blocking equipment, second with the other side of blocking equipment the first direct current of access
Direct current is opened in blocking equipment series connection wire, and the 6th direct current is opened open-minded with the other side of blocking equipment the 4th direct current of access
It opens with blocking equipment, the 5th direct current in blocking equipment series connection wire, the earthing pole equipment of intermediate converter station accesses third
Direct current open with blocking equipment, the 6th direct current open in blocking equipment series connection wire, the 7th direct current open with blocking equipment,
8th direct current is opened to open with blocking equipment, the 9th direct current and opens and connect respectively with blocking equipment with blocking equipment, the tenth direct current
Between one DC power transmission line and intermediate converter station inverter, the first direct current, which is opened, to be flanked with the another of blocking equipment the 7th
Direct current is opened in blocking equipment and intermediate converter station inverter series connection wire, and the second direct current is opened another with blocking equipment
It flanks and opens in the 8th direct current in blocking equipment and intermediate converter station inverter series connection wire, third direct current is opened and blocked
Equipment it is another flank the 9th direct current open in blocking equipment and intermediate converter station inverter series connection wire, the 4th direct current
It opens and is opened and blocking equipment and intermediate converter station inverter series connection wire with another flank of blocking equipment in the tenth direct current
On；
Side Inverter Station is opened including the 14th direct current and is opened and blocking equipment (S5) with blocking equipment (S4), the 15th direct current
And the 16th direct current open with blocking equipment (S6), the 14th direct current, which is opened, to be opened and blocks with blocking equipment, the 15th direct current
After equipment is connected in series, the 14th direct current, which is opened, flanks one article of DC line with the another of blocking equipment, and the 15th direct current is open-minded
Another with blocking equipment flanks an other DC line, opens in the 14th direct current and opens with blocking equipment, the 15th direct current
All earthing poles of side Inverter Station are accessed in logical and blocking equipment series connection wire, while the 16th is accessed in series connection wire
Direct current is opened and blocking equipment, and the 16th direct current, which is opened, to be connected with another flank of blocking equipment in side Inverter Station the two poles of the earth inverter
On line.
Fig. 2 is the conventional operation mode of series-connection multi-terminal direct current system earth pole, and control program is: the 11st direct current
It opens and opens with blocking equipment with blocking equipment, the 12nd direct current all in blocking state, the 13rd direct current is opened and blocking is set
Standby to be in opening state, the first direct current is opened to open with blocking equipment, the second direct current and opens and hinder with blocking equipment, third direct current
Disconnected equipment, the 4th direct current is opened and blocking equipment, the 5th direct current is opened and blocking equipment, the 6th direct current are opened and blocking equipment all
In blocking state, the 7th direct current is opened to open with blocking equipment, the 8th direct current and opens and block with blocking equipment, the 9th direct current
Equipment and the tenth direct current, which are opened, is in opening state with blocking equipment, and the 14th direct current is opened with blocking equipment, the 15th directly
Stream is opened with blocking equipment all in blocking state, and the 16th direct current, which is opened, is in opening state with blocking equipment.
Fig. 3 is that converter station is switched to the side converting plant earthing pole method of operation one among series-connection multi-terminal direct current system,
Control program is: the first direct current is opened to open with blocking equipment, the second direct current and be opened with blocking equipment, third direct current and blocking is set
Standby, the 9th direct current, which is opened to open with blocking equipment and the tenth direct current, is in opening state with blocking equipment, and the 4th direct current is open-minded
It opens with blocking equipment, the 5th direct current and is opened and blocking equipment, the 7th direct current is opened and blocking is set with blocking equipment, the 6th direct current
Standby, the 8th direct current is opened with blocking equipment all in blocking state, and the 14th direct current is opened to be opened with blocking equipment, the 15th direct current
For logical and blocking equipment all in blocking state, the 16th direct current, which is opened, is in opening state with blocking equipment.This method of operation
It stops transport suitable for side converting plant, the field of the DC line stoppage in transit maintenance where SL1 and the DC line stoppage in transit maintenance where SL2
It closes.
Fig. 4 is that converter station is switched to the side converting plant earthing pole method of operation two among series-connection multi-terminal direct current system,
Control program is: the 12nd direct current, which is opened, to be opened with blocking equipment with blocking equipment, the 13rd direct current all in blocking state, and
11 direct currents, which are opened, is in opening state with blocking equipment, and the first direct current, which is opened, to be opened and block with blocking equipment, the second direct current
Equipment, the 7th direct current are opened to be opened and blocking equipment and the tenth direct current is opened and blocking equipment with blocking equipment, the 9th direct current
In opening state, third direct current is opened to open with blocking equipment, the 4th direct current and opens and block with blocking equipment, the 5th direct current
Equipment, the 6th direct current, which are opened, to be opened with blocking equipment with blocking equipment, the 8th direct current all in blocking state, and the 14th direct current is opened
Logical and blocking equipment, the 15th direct current are opened with blocking equipment all in blocking state, and the 16th direct current is opened and blocking equipment
In opening state.This method of operation is suitable for the field that side converting plant stops transport and the DC line stoppage in transit where SL2 is overhauled
It closes.
Fig. 5 is that converter station is switched to the side converting plant earthing pole method of operation three among series-connection multi-terminal direct current system,
Control program is: the 11st direct current, which is opened, to be opened with blocking equipment with blocking equipment, the 13rd direct current all in blocking state, and
12 direct currents, which are opened, is in opening state with blocking equipment, and the first direct current, which is opened, to be opened and block with blocking equipment, the second direct current
Equipment, the 8th direct current are opened to be opened and blocking equipment and the tenth direct current is opened and blocking equipment with blocking equipment, the 9th direct current
In opening state, third direct current is opened to open with blocking equipment, the 4th direct current and opens and block with blocking equipment, the 5th direct current
Equipment, the 6th direct current, which are opened, to be opened with blocking equipment with blocking equipment, the 7th direct current all in blocking state, and the 14th direct current is opened
Logical and blocking equipment, the 15th direct current are opened with blocking equipment all in blocking state, and the 16th direct current is opened and blocking equipment
In opening state.This method of operation is suitable for the field that side converting plant stops transport and the DC line stoppage in transit where SL1 is overhauled
It closes.
Fig. 6 is that converter station is switched to the side converting plant earthing pole method of operation four among series-connection multi-terminal direct current system,
Control program is: the 11st direct current, which is opened, to be opened with blocking equipment with blocking equipment, the 12nd direct current all in opening state, and
13 direct currents, which are opened, is in blocking state with blocking equipment, and the first direct current, which is opened, to be opened and block with blocking equipment, the second direct current
Equipment, the 7th direct current open with blocking equipment, the 8th direct current open with blocking equipment, the 9th direct current open with blocking equipment and
Tenth direct current, which is opened, is in opening state with blocking equipment, and third direct current, which is opened, to be opened and block with blocking equipment, the 4th direct current
Equipment, the 5th direct current, which are opened, to be opened with blocking equipment with blocking equipment, the 6th direct current all in blocking state, and the 14th direct current is opened
Logical and blocking equipment, the 15th direct current are opened with blocking equipment all in blocking state, and the 16th direct current is opened and blocking equipment
In opening state.This method of operation can farthest reduce ground path resistance when side converting plant stops transport, and reduce
The energy loss of route.
Fig. 7 is that converter station is switched to the side converting plant earthing pole method of operation five among series-connection multi-terminal direct current system,
Control program is: the 11st direct current, which is opened, to be opened with blocking equipment with blocking equipment, the 12nd direct current all in opening state, and
13 direct currents, which are opened, is in blocking state with blocking equipment, and the first direct current, which is opened, to be opened and block with blocking equipment, the second direct current
Equipment, third direct current are opened to open with blocking equipment, the 4th direct current and be opened and blocking equipment, with blocking equipment, the 5th direct current
Six direct currents are opened with blocking equipment all in blocking state, and the 7th direct current, which is opened, to be opened and block with blocking equipment, the 8th direct current
Equipment, the 9th direct current, which are opened to open with blocking equipment and the tenth direct current, is in opening state, the 14th direct current with blocking equipment
It opens and opens with blocking equipment with blocking equipment, the 15th direct current all in blocking state, the 16th direct current is opened and blocking is set
It is standby to be in opening state.This method of operation is applicable in side converting plant and stops transport, the occasion of intermediate converter station earthing pole failure.
Fig. 8 is that converter station is switched to the side Inverter Station earthing pole method of operation one among series-connection multi-terminal direct current system,
Control program is: the 11st direct current, which is opened, to be opened with blocking equipment with blocking equipment, the 12nd direct current all in blocking state, and
13 direct currents, which are opened, is in opening state with blocking equipment, and the first direct current, which is opened, to be opened and block with blocking equipment, the second direct current
Equipment, third direct current are opened to be opened and blocking equipment and the tenth direct current is opened and blocking equipment with blocking equipment, the 9th direct current
In blocking state, the 4th direct current is opened to open with blocking equipment, the 5th direct current and opens and block with blocking equipment, the 6th direct current
Equipment, the 7th direct current, which are opened, to be opened with blocking equipment with blocking equipment, the 8th direct current all on state.This method of operation
It stops transport suitable for side Inverter Station, the field of the DC line stoppage in transit maintenance where SL3 and the DC line stoppage in transit maintenance where SL4
It closes.
Fig. 9 is that converter station is switched to the side Inverter Station earthing pole method of operation two among series-connection multi-terminal direct current system,
Control program is: the 11st direct current, which is opened, to be opened with blocking equipment with blocking equipment, the 12nd direct current all in blocking state, and
13 direct currents, which are opened, is in opening state with blocking equipment, and the 4th direct current, which is opened, to be opened and block with blocking equipment, the 5th direct current
Equipment, the 7th direct current are opened to be opened and blocking equipment and the 9th direct current is opened and blocking equipment with blocking equipment, the 8th direct current
In opening state, the first direct current is opened to open with blocking equipment, the second direct current and opens and block with blocking equipment, third direct current
Equipment, the 6th direct current, which are opened, to be opened with blocking equipment with blocking equipment, the tenth direct current all in blocking state, and the 15th direct current is opened
Logical and blocking equipment, the 16th direct current are opened with blocking equipment all in blocking state, and the 14th direct current is opened and blocking equipment
In opening state.This method of operation is suitable for the field that side Inverter Station is stopped transport and the DC line stoppage in transit where SL4 is overhauled
It closes.
Figure 10 is that converter station is switched to the side Inverter Station earthing pole method of operation three among series-connection multi-terminal direct current system,
Control program is: the 11st direct current, which is opened, to be opened with blocking equipment with blocking equipment, the 12nd direct current all in blocking state, and
13 direct currents, which are opened, is in opening state with blocking equipment, and the 4th direct current, which is opened, to be opened and block with blocking equipment, the 5th direct current
Equipment, the 7th direct current are opened to be opened and blocking equipment and the tenth direct current is opened and blocking equipment with blocking equipment, the 8th direct current
In opening state, the first direct current is opened to open with blocking equipment, the second direct current and opens and block with blocking equipment, third direct current
Equipment, the 6th direct current, which are opened, to be opened with blocking equipment with blocking equipment, the 9th direct current all in blocking state, and the 14th direct current is opened
Logical and blocking equipment, the 16th direct current are opened with blocking equipment all in blocking state, and the 15th direct current is opened and blocking equipment
In opening state.This method of operation is suitable for the field that side Inverter Station is stopped transport and the DC line stoppage in transit where SL3 is overhauled
It closes.
Figure 11 is that converter station is switched to the side Inverter Station earthing pole method of operation four among series-connection multi-terminal direct current system,
Control program is: the 11st direct current, which is opened, to be opened with blocking equipment with blocking equipment, the 12nd direct current all in blocking state, and
13 direct currents, which are opened, is in opening state with blocking equipment, and the 4th direct current, which is opened, to be opened and block with blocking equipment, the 5th direct current
Equipment, the 7th direct current open with blocking equipment, the 8th direct current open with blocking equipment, the 9th direct current open with blocking equipment and
Tenth direct current, which is opened, is in opening state with blocking equipment, and the first direct current, which is opened, to be opened and block with blocking equipment, the second direct current
Equipment, third direct current, which are opened, to be opened with blocking equipment with blocking equipment, the 6th direct current all in blocking state, and the 14th direct current is opened
Logical and blocking equipment, the 15th direct current are opened and are in opening state with blocking equipment, the 16th direct current open at blocking equipment
In blocking state.This method of operation can farthest reduce ground path resistance when side Inverter Station is stopped transport, and reduce line
The energy loss on road.
Figure 12 is that converter station is switched to the side Inverter Station earthing pole method of operation five among series-connection multi-terminal direct current system,
Control program is: the 11st direct current, which is opened, to be opened with blocking equipment with blocking equipment, the 12nd direct current all in blocking state, and
13 direct currents, which are opened, is in opening state with blocking equipment, and the first direct current, which is opened, to be opened and block with blocking equipment, the second direct current
Equipment, third direct current are opened to open with blocking equipment, the 4th direct current and be opened and blocking equipment, with blocking equipment, the 5th direct current
Six direct currents are opened with blocking equipment all in blocking state, and the 7th direct current, which is opened, to be opened and block with blocking equipment, the 8th direct current
Equipment, the 9th direct current, which are opened to open with blocking equipment and the tenth direct current, is in opening state, the 14th direct current with blocking equipment
It opens to open with blocking equipment, the 15th direct current and is in that opening state, the 16th direct current is opened and blocking equipment with blocking equipment
In blocking state.This method of operation is applicable in side Inverter Station and stops transport, the occasion of intermediate converter station earthing pole failure.
Figure 13 is earthing pole method of operation when converter station is stopped transport among series-connection multi-terminal direct current system, control program
Be: the 11st direct current, which is opened, to be opened with blocking equipment with blocking equipment, the 12nd direct current all in blocking state, the 13rd direct current
It opens and is in opening state with blocking equipment, the first direct current is opened to be opened and blocking equipment, third with blocking equipment, the second direct current
Direct current open opened with blocking equipment, the 4th direct current opened with blocking equipment, the 5th direct current it is open-minded with blocking equipment, the 6th direct current
It opens with blocking equipment, the 7th direct current and is opened and blocking equipment, the 9th direct current is opened and blocking is set with blocking equipment, the 8th direct current
Standby and the tenth direct current, which is opened, is in opening state with blocking equipment, and the 14th direct current is opened and blocking equipment, the 15th direct current
It opens and is in blocking state with blocking equipment, the 16th direct current is opened and is in opening state with blocking equipment.The change of current intermediate in this way
It stands after stoppage in transit, left and right two halves sections in series multi-terminal HVDC transmission subsystem still independent can be run.
In summary, circuit of the present invention is realized by the equipment that circuit can be opened and be blocked to by-pass knife switch or breaker etc.
The switching of converter station earthing mode among series-connection multi-terminal direct current system.The circuit is in intermediate converter station each direct current transportation
Between route and inverter configuration can open and block the equipment of circuit, the leading-out terminal of a pole inverter and an other pole inlet wire
Configuration interconnection in end configures two and can open and block and matches between the equipment of circuit, two interconnections on each interconnection
Set earthing pole lead, on earthing pole lead configuration two can open and block the equipment of circuit, on earthing pole lead two it is open-minded
Earthing pole equipment is accessed between blocking equipment；Respectively while converting plant and while Inverter Station two-wire line between configure interconnection,
And configured on interconnection two can open and block the equipment of circuit, on interconnection two open it is indirectly with blocking equipment
Enter the crosspoint of earthing pole equipment, earthing pole equipment and interconnection and open by another to be connected to the two poles of the earth with blocking equipment and change
Flow the junction of device.The present invention can provide a variety of earthing pole methods of operation for series-connection multi-terminal direct current system, improve series connection
The reliability and electric energy transmittability of multi-terminal direct current transmission system, can be widely applied in series-connection multi-terminal direct current system.
The above examples only illustrate the technical idea of the present invention, and this does not limit the scope of protection of the present invention, all
According to the technical idea provided by the invention, any changes made on the basis of the technical scheme each falls within the scope of the present invention
Within.
Claims (6)
1. a kind of series-connection multi-terminal direct current system converter station is grounded polar circuit, it is characterised in that: including a Ge Bian converting plant, extremely
A few intermediate converter station and a side Inverter Station；
Side converting plant includes that the 11st direct current is opened and opened and blocking equipment (S2) and the with blocking equipment (S1), the 12nd direct current
13 direct currents are opened to be opened and blocking equipment, the 12nd direct current is opened and blocking equipment with blocking equipment (S3), the 11st direct current
After series connection, the 11st direct current, which is opened, flanks one article of DC line with the another of blocking equipment, and the 12nd direct current is opened and hindered
Disconnected the another of equipment flanks an other DC line, the 11st direct current open opened with blocking equipment, the 12nd direct current and
All earthing poles of side converting plant are accessed in blocking equipment series connection wire, while the 13rd direct current is accessed in series connection wire
It opens and blocking equipment, the 13rd direct current, which is opened, to be flanked with the another of blocking equipment in side converting plant the two poles of the earth inverter connecting line
On；
Intermediate converter station includes that the first direct current is opened and opened and blocking equipment (SR2), the with blocking equipment (SR1), the second direct current
Three direct currents are opened to be opened and blocking equipment (SI1), the 5th direct current is opened and blocking equipment with blocking equipment (SR3), the 4th direct current
(SI2), the 6th direct current open opened with blocking equipment (SI3), the 7th direct current opened with blocking equipment (SL1), the 8th direct current and
Blocking equipment (SL2), the 9th direct current open opened with blocking equipment (SL3) and the tenth direct current it is straight with blocking equipment (SL4), first
Stream is opened to open with blocking equipment, the second direct current and is connected in series with blocking equipment, and the 4th direct current is opened with blocking equipment, the 5th directly
Stream is opened to be connected in series with blocking equipment, and third direct current, which is opened to open to connect with blocking equipment with blocking equipment, the 6th direct current, to be connected
It connects, third direct current is opened to open with the other side of blocking equipment the first direct current of access and opens and hinder with blocking equipment, the second direct current
In disconnected equipment series connection wire, the 6th direct current open with the other side of blocking equipment access the 4th direct current open with blocking equipment,
5th direct current is opened in blocking equipment series connection wire, and the earthing pole equipment access third direct current of intermediate converter station is opened and hindered
Disconnected equipment, the 6th direct current are opened in blocking equipment series connection wire, and the 7th direct current is opened open-minded with blocking equipment, the 8th direct current
It opens to open with blocking equipment, the tenth direct current with blocking equipment, the 9th direct current and be connect respectively with blocking equipment in one article of direct current transportation
Between route and intermediate converter station inverter, the first direct current, which is opened, to be opened and hinders in the 7th direct current with another flank of blocking equipment
In disconnected equipment and intermediate converter station inverter series connection wire, the second direct current is opened to be flanked the 8th directly with the another of blocking equipment
Stream is opened in blocking equipment and intermediate converter station inverter series connection wire, and third direct current opens the other side with blocking equipment
It connects and opens in the 9th direct current in blocking equipment and intermediate converter station inverter series connection wire, the 4th direct current is opened and blocking is set
It is standby it is another flank the tenth direct current open in blocking equipment and intermediate converter station inverter series connection wire；
Side Inverter Station includes that the 14th direct current is opened and opened and blocking equipment (S5) and the with blocking equipment (S4), the 15th direct current
16 direct currents are opened to be opened and blocking equipment, the 15th direct current is opened and blocking equipment with blocking equipment (S6), the 14th direct current
After series connection, the 14th direct current, which is opened, flanks one article of DC line with the another of blocking equipment, and the 15th direct current is opened and hindered
Disconnected the another of equipment flanks an other DC line, the 14th direct current open opened with blocking equipment, the 15th direct current and
All earthing poles of side Inverter Station are accessed in blocking equipment series connection wire, while the 16th direct current is accessed in series connection wire
It opens and blocking equipment, the 16th direct current, which is opened, to be flanked with the another of blocking equipment in side Inverter Station the two poles of the earth inverter connecting line
On.
2. series-connection multi-terminal direct current system converter station as described in claim 1 is grounded polar circuit, it is characterised in that: described each
Direct current is opened with blocking equipment using by-pass knife switch or breaker.
3. a kind of control method of series-connection multi-terminal direct current system converter station ground connection polar circuit as described in claim 1,
Be characterized in that: control ground connection polar circuit works in conventional operation mode, and control program is: the 11st direct current is opened and blocking is set
Standby, the 12nd direct current is opened with blocking equipment all in blocking state, and the 13rd direct current, which is opened to be in blocking equipment, opens shape
State, the first direct current are opened to open with blocking equipment, the second direct current and be opened and blocking equipment, the 4th with blocking equipment, third direct current
Direct current is opened to open with blocking equipment, the 5th direct current and be opened with blocking equipment with blocking equipment, the 6th direct current all in blocking shape
State, the 7th direct current are opened to open with blocking equipment, the 8th direct current and be opened and blocking equipment and with blocking equipment, the 9th direct current
Ten direct currents, which are opened, is in opening state with blocking equipment, and the 14th direct current, which is opened, to be opened and hinder with blocking equipment, the 15th direct current
For equipment of breaking all in blocking state, the 16th direct current, which is opened, is in opening state with blocking equipment.
4. a kind of control method of series-connection multi-terminal direct current system converter station ground connection polar circuit as described in claim 1,
Be characterized in that: control ground connection polar circuit works in intermediate converter station and is switched to the side converting plant method of operation, using side control as follows
One of case:
The first control program: the first direct current open opened with blocking equipment, the second direct current it is open-minded with blocking equipment, third direct current
It opens to open with blocking equipment and the tenth direct current with blocking equipment, the 9th direct current and is in opening state with blocking equipment, the 4th
Direct current open opened with blocking equipment, the 5th direct current opened with blocking equipment, the 6th direct current it is open-minded with blocking equipment, the 7th direct current
It opens with blocking equipment with blocking equipment, the 8th direct current all in blocking state, the 14th direct current is opened and blocking equipment, the tenth
Five direct currents are opened with blocking equipment all in blocking state, and the 16th direct current, which is opened, is in opening state with blocking equipment；
Second of control program: the 12nd direct current, which is opened, to be opened with blocking equipment with blocking equipment, the 13rd direct current all in resistance
Disconnected state, the 11st direct current, which is opened, is in opening state with blocking equipment, and the first direct current is opened to be opened with blocking equipment, the second direct current
Logical and blocking equipment, the 7th direct current open opened with blocking equipment, the 9th direct current opened with blocking equipment and the tenth direct current and
Blocking equipment is in opening state, and third direct current is opened to open with blocking equipment, the 4th direct current and be opened with blocking equipment, the 5th direct current
Logical and blocking equipment, the 6th direct current, which are opened, to be opened with blocking equipment with blocking equipment, the 8th direct current all in blocking state, and the tenth
Four direct currents, which are opened, to be opened with blocking equipment with blocking equipment, the 15th direct current all in blocking state, the 16th direct current open and
Blocking equipment is in opening state；
The third control program: the 11st direct current, which is opened, to be opened with blocking equipment with blocking equipment, the 13rd direct current all in resistance
Disconnected state, the 12nd direct current, which is opened, is in opening state with blocking equipment, and the first direct current is opened to be opened with blocking equipment, the second direct current
Logical and blocking equipment, the 8th direct current open opened with blocking equipment, the 9th direct current opened with blocking equipment and the tenth direct current and
Blocking equipment is in opening state, and third direct current is opened to open with blocking equipment, the 4th direct current and be opened with blocking equipment, the 5th direct current
Logical and blocking equipment, the 6th direct current, which are opened, to be opened with blocking equipment with blocking equipment, the 7th direct current all in blocking state, and the tenth
Four direct currents, which are opened, to be opened with blocking equipment with blocking equipment, the 15th direct current all in blocking state, the 16th direct current open and
Blocking equipment is in opening state；
4th kind of control program: the 11st direct current, which is opened, to be opened with blocking equipment with blocking equipment, the 12nd direct current all in opening
Logical state, the 13rd direct current, which is opened, is in blocking state with blocking equipment, and the first direct current is opened to be opened with blocking equipment, the second direct current
Logical and blocking equipment, the 7th direct current, which are opened to open with blocking equipment, the 8th direct current, to be opened and blocks with blocking equipment, the 9th direct current
Equipment and the tenth direct current, which are opened, is in opening state with blocking equipment, and third direct current is opened to be opened with blocking equipment, the 4th direct current
Logical and blocking equipment, the 5th direct current, which are opened, to be opened with blocking equipment with blocking equipment, the 6th direct current all in blocking state, and the tenth
Four direct currents, which are opened, to be opened with blocking equipment with blocking equipment, the 15th direct current all in blocking state, the 16th direct current open and
Blocking equipment is in opening state；
5th kind of control program: the 11st direct current, which is opened, to be opened with blocking equipment with blocking equipment, the 12nd direct current all in opening
Logical state, the 13rd direct current, which is opened, is in blocking state with blocking equipment, and the first direct current is opened to be opened with blocking equipment, the second direct current
Logical and blocking equipment, third direct current, which are opened to open with blocking equipment, the 4th direct current, to be opened and blocks with blocking equipment, the 5th direct current
Equipment, the 6th direct current are opened with blocking equipment all in blocking state, and the 7th direct current is opened open-minded with blocking equipment, the 8th direct current
It opens to open with blocking equipment and the tenth direct current with blocking equipment, the 9th direct current and is in opening state with blocking equipment, the tenth
Four direct currents, which are opened, to be opened with blocking equipment with blocking equipment, the 15th direct current all in blocking state, the 16th direct current open and
Blocking equipment is in opening state.
5. a kind of control method of series-connection multi-terminal direct current system converter station ground connection polar circuit as described in claim 1,
Be characterized in that: control ground connection polar circuit works in intermediate converter station and is switched to the side Inverter Station method of operation, using side control as follows
One of case:
The first control program: the 11st direct current, which is opened, to be opened with blocking equipment with blocking equipment, the 12nd direct current all in resistance
Disconnected state, the 13rd direct current, which is opened, is in opening state with blocking equipment, and the first direct current is opened to be opened with blocking equipment, the second direct current
Logical and blocking equipment, third direct current open opened with blocking equipment, the 9th direct current opened with blocking equipment and the tenth direct current and
Blocking equipment is in blocking state, and the 4th direct current is opened to open with blocking equipment, the 5th direct current and be opened with blocking equipment, the 6th direct current
Logical and blocking equipment, the 7th direct current, which are opened, to be opened with blocking equipment with blocking equipment, the 8th direct current all on state；
Second of control program: the 11st direct current, which is opened, to be opened with blocking equipment with blocking equipment, the 12nd direct current all in resistance
Disconnected state, the 13rd direct current, which is opened, is in opening state with blocking equipment, and the 4th direct current is opened to be opened with blocking equipment, the 5th direct current
Logical and blocking equipment, the 7th direct current open opened with blocking equipment, the 8th direct current opened with blocking equipment and the 9th direct current and
Blocking equipment is in opening state, and the first direct current is opened to open with blocking equipment, the second direct current and be opened with blocking equipment, third direct current
Logical and blocking equipment, the 6th direct current, which are opened, to be opened with blocking equipment with blocking equipment, the tenth direct current all in blocking state, and the tenth
Five direct currents, which are opened, to be opened with blocking equipment with blocking equipment, the 16th direct current all in blocking state, the 14th direct current open and
Blocking equipment is in opening state；
The third control program: the 11st direct current, which is opened, to be opened with blocking equipment with blocking equipment, the 12nd direct current all in resistance
Disconnected state, the 13rd direct current, which is opened, is in opening state with blocking equipment, and the 4th direct current is opened to be opened with blocking equipment, the 5th direct current
Logical and blocking equipment, the 7th direct current open opened with blocking equipment, the 8th direct current opened with blocking equipment and the tenth direct current and
Blocking equipment is in opening state, and the first direct current is opened to open with blocking equipment, the second direct current and be opened with blocking equipment, third direct current
Logical and blocking equipment, the 6th direct current, which are opened, to be opened with blocking equipment with blocking equipment, the 9th direct current all in blocking state, and the tenth
Four direct currents, which are opened, to be opened with blocking equipment with blocking equipment, the 16th direct current all in blocking state, the 15th direct current open and
Blocking equipment is in opening state；
4th kind of control program: the 11st direct current, which is opened, to be opened with blocking equipment with blocking equipment, the 12nd direct current all in resistance
Disconnected state, the 13rd direct current, which is opened, is in opening state with blocking equipment, and the 4th direct current is opened to be opened with blocking equipment, the 5th direct current
Logical and blocking equipment, the 7th direct current, which are opened to open with blocking equipment, the 8th direct current, to be opened and blocks with blocking equipment, the 9th direct current
Equipment and the tenth direct current, which are opened, is in opening state with blocking equipment, and the first direct current is opened to be opened with blocking equipment, the second direct current
Logical and blocking equipment, third direct current, which are opened, to be opened with blocking equipment with blocking equipment, the 6th direct current all in blocking state, and the tenth
Four direct currents open opened with blocking equipment, the 15th direct current be in opening state with blocking equipment, the 16th direct current is opened and is hindered
Disconnected equipment is in blocking state；
5th kind of control program: the 11st direct current, which is opened, to be opened with blocking equipment with blocking equipment, the 12nd direct current all in resistance
Disconnected state, the 13rd direct current, which is opened, is in opening state with blocking equipment, and the first direct current is opened to be opened with blocking equipment, the second direct current
Logical and blocking equipment, third direct current, which are opened to open with blocking equipment, the 4th direct current, to be opened and blocks with blocking equipment, the 5th direct current
Equipment, the 6th direct current are opened with blocking equipment all in blocking state, and the 7th direct current is opened open-minded with blocking equipment, the 8th direct current
It opens to open with blocking equipment and the tenth direct current with blocking equipment, the 9th direct current and is in opening state with blocking equipment, the tenth
Four direct currents open opened with blocking equipment, the 15th direct current be in opening state with blocking equipment, the 16th direct current is opened and is hindered
Disconnected equipment is in blocking state.
6. a kind of control method of series-connection multi-terminal direct current system converter station ground connection polar circuit as described in claim 1,
Be characterized in that: control ground connection polar circuit works in the intermediate converter station stoppage in transit method of operation, and control program is: the 11st direct current is opened
Logical and blocking equipment, the 12nd direct current are opened with blocking equipment all in blocking state, and the 13rd direct current is opened and blocking equipment
In opening state, the first direct current is opened to open with blocking equipment, the second direct current and opens and block with blocking equipment, third direct current
Equipment, the 4th direct current are opened to open with blocking equipment, the 5th direct current and be opened and blocking equipment, with blocking equipment, the 6th direct current
Seven direct currents are opened to open with blocking equipment, the 8th direct current and be opened with blocking equipment and the tenth directly with blocking equipment, the 9th direct current
Stream, which is opened, is in opening state with blocking equipment, and the 14th direct current is opened and blocking equipment, the 15th direct current is opened and blocking is set
It is standby to open in blocking state, the 16th direct current and be in opening state with blocking equipment.
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| CN103580053A (en) * | 2012-07-23 | 2014-02-12 | Abb技术有限公司 | Series-connection multi-terminal direct current transmission system and operation method used during transmission capacity loss of system |
| CN203553959U (en) * | 2013-11-27 | 2014-04-16 | 南方电网科学研究院有限责任公司 | Multi-terminal flexible direct-current power transmission system |
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