CN208739024U - Direct current is let out can branch and HVDC transmission system - Google Patents
Direct current is let out can branch and HVDC transmission system Download PDFInfo
- Publication number
- CN208739024U CN208739024U CN201821409545.8U CN201821409545U CN208739024U CN 208739024 U CN208739024 U CN 208739024U CN 201821409545 U CN201821409545 U CN 201821409545U CN 208739024 U CN208739024 U CN 208739024U
- Authority
- CN
- China
- Prior art keywords
- branch
- dynamic
- out energy
- transmission system
- arrester
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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]
Landscapes
- Inverter Devices (AREA)
Abstract
The utility model discloses a kind of direct current let out can branch and HVDC transmission system, direct current let out can branch include: the first dynamic let out can branch and the second dynamic let out can branch；First dynamic is let out the input terminal of energy branch and is electrically connected with the anode of the HVDC transmission system DC power transmission line, the output end that first dynamic lets out energy branch is electrically connected and is grounded with the input terminal that second dynamic lets out energy branch, and the output end that second dynamic lets out energy branch is electrically connected with the cathode of the HVDC transmission system transmission line of electricity；It includes the first thyristor groups circuit and the first arrester group that first dynamic, which lets out energy branch, and it includes the second thyristor groups circuit and the second arrester group that second dynamic, which lets out energy branch,.It includes that converting plant, Inverter Station, DC line and direct current as described above let out energy branch that the direct current, which lets out energy branch,.The utility model can be effectively reduced equipment cost, improve the reliability for letting out energy circuit.
Description
Technical field
The utility model relates to direct current transmission and distribution technical fields, and letting out more particularly to a kind of direct current can branch and high voltage direct current
Transmission system.
Background technique
Recently as the fast development of electronic power switch device, flexible DC transmission is in voltage class, transmission distance
In transmission capacity, transmit electricity to Traditional DC gradually close.The control and protection system of flexible HVDC transmission system can
The uninterrupted operation ability of system in case of a fault is improved by reasonably configuring, to realize the defencive function of system.
However, busbar voltage will be fallen, to system can be caused to pass when receiving end converter station ac bus failure or when disturbing
The decline of defeated power, if in the case that sending end converter station keeps nominal transmission power constant during failure at this time, it will cause
Converter station submodule capacitor voltage and AC line voltage increase, so as to cause the damage of power device and capacitor, problems
It is more protruded in the case where new-energy grid-connected is sent outside.Therefore, it is necessary to (the 200ms- during receiving end exchanges side failure
300ms), the power that can not be fully absorbed for receiving end AC system is released, and it is extensive that system reboot is completed after failure removal
Multiple normal operating condition, to guarantee the safe operation of power device in the converter station of both ends.
When DC transmission system breaks down, although existing direct current is let out energy branch and can also be let out to superfluous power
It puts, still, since component is directly connect with DC line, will lead to the dielectric level requirement to component and increase, to increase
Oil (gas) filling device cost.
Utility model content
The purpose of the utility model is to provide a kind of direct currents to let out energy branch, can be effectively reduced the electricity at component both ends
Pressure, guarantees the normal operation of component.
In order to solve the above-mentioned technical problem, the utility model provide a kind of direct current let out can branch, be configured at high-voltage dc transmission
Electric system, comprising: the first dynamic lets out energy branch and the second dynamic lets out energy branch；
First dynamic is let out can the input terminal of branch and the anode of the HVDC transmission system DC power transmission line
Electrical connection, the output end that first dynamic lets out energy branch are electrically connected and connect with the input terminal that second dynamic lets out energy branch
Ground, the output end that second dynamic lets out energy branch are electrically connected with the cathode of the HVDC transmission system transmission line of electricity；
It includes the first thyristor groups circuit and the first arrester group, first thyristor that first dynamic, which lets out energy branch,
The first end of group circuit is electrically connected with the anode of the HVDC transmission system DC power transmission line, first thyristor groups
The second end of circuit is electrically connected with the first end of the first arrester group, the second end of the first arrester group and described the
The input terminal that two dynamics let out energy branch is electrically connected and is grounded；
It includes the second thyristor groups circuit and the second arrester group, second thyristor that second dynamic, which lets out energy branch,
Group circuit first end be electrically connected with the first end of the second arrester group, the second end of the second arrester group with it is described
The cathode of HVDC transmission system DC power transmission line is electrically connected.
As prioritization scheme, the first thyristor groups circuit includes the first thyristor groups that several are connected in series,
In, first thyristor groups include M thyristor, M >=1.
As prioritization scheme, the second thyristor groups circuit includes the second thyristor groups that several are connected in series,
In, second thyristor groups include N number of thyristor, N >=1.
As prioritization scheme, arrester quantity in the first arrester group is m, and between m arrester it is in the same direction simultaneously
Connection, and be connected in parallel between the positive and negative anodes of the HVDC transmission system DC power transmission line jointly, wherein m >=1.
As prioritization scheme, arrester quantity in the second arrester group is n, and between n arrester it is in the same direction simultaneously
Connection, and be connected in parallel between the positive and negative anodes of the HVDC transmission system DC power transmission line jointly, wherein n >=1.
In order to solve identical technical problem, the utility model also provides a kind of HVDC transmission system, including rectification
It stands, Inverter Station, DC line and direct current as described above let out energy branch；Wherein, the converting plant and the Inverter Station include
Modularization multi-level converter；The modularization of positive, the described Inverter Station of the modularization multi-level converter of the converting plant is more
The anode of level converter is connected with the DC line；The cathode of the modularization multi-level converter of the converting plant, institute
The cathode for stating the modularization multi-level converter of Inverter Station is connected with the DC line.
Direct current in the utility model embodiment lets out energy branch, including the first dynamic lets out energy branch and the second dynamic is let out and can be propped up
Road；The anode that first dynamic lets out the input terminal and the HVDC transmission system DC power transmission line of energy branch is electrically connected
It connects, the output end that first dynamic lets out energy branch is electrically connected and is grounded, institute with the input terminal that second dynamic lets out energy branch
State the second dynamic let out can the output end of branch be electrically connected with the cathode of the HVDC transmission system transmission line of electricity；Described first
Dynamic let out can branch include the first thyristor groups circuit and the first arrester group, the first end of the first thyristor groups circuit with
The anode electrical connection of the HVDC transmission system DC power transmission line, the second end of the first thyristor groups circuit and institute
The first end electrical connection of the first arrester group is stated, the second end of the first arrester group and second dynamic let out energy branch
Input terminal is electrically connected and is grounded；It includes the second thyristor groups circuit and the second arrester group, institute that second dynamic, which lets out energy branch,
The first end for stating the second thyristor groups circuit is electrically connected with the first end of the second arrester group, the second arrester group
Second end is electrically connected with the cathode of the HVDC transmission system DC power transmission line.Pass through the anode access in DC line
Several series thyristor groups and let out can resistance, while for dynamic let out can branch construct a grounding point, can effectively drop
The voltage at low component both ends, guarantees the normal operation of component.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of HVDC transmission system in the utility model embodiment；
Fig. 2 be in the utility model embodiment a kind of direct current let out can branch structural schematic diagram.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below
Embodiment is not intended to limit the scope of the present invention for illustrating the utility model.
As shown in Figure 1, being a kind of structural schematic diagram of HVDC transmission system provided by the embodiment of the utility model, institute
Stating HVDC transmission system includes that converting plant, Inverter Station, DC line and dynamic let out energy branch；Wherein, the converting plant
It include modularization multi-level converter with the Inverter Station；The modularization multi-level converter of the converting plant it is positive, described
The anode of the modularization multi-level converter of Inverter Station is connected with the DC line；The modular multilevel of the converting plant
The cathode of inverter, the Inverter Station the cathode of modularization multi-level converter be connected with the DC line.
In the utility model embodiment, it should be noted that the modularization multi-level converter of the converting plant and institute
The modularization multi-level converter for stating Inverter Station has 6 bridge arms, each bridge arm submodule SM (Sub- the same by N number of specification
Module it) is composed in series with a reactor L.The module of the modularization multi-level converter of the converting plant and the Inverter Station
Change multilevel converter passes through three-phase transformer and connect with AC system, AC system power supply UsaBy indicating, transformer is used
Equivalent inductance LsaIt indicates, r is used in converter station losseqIt indicates, transformer reactance XTIt indicates, AC line voltage UdIt indicates.Its
In, the submodule SM is half-bridge submodule.
In the present embodiment, in the modularization multi-level converter HVDC transmission system, converting plant is set
Transmission power is P1, the reception power of Inverter Station is P2, flowing into the dynamic and letting out the power of energy branch is P3, work as DC power transmission system
P when system operates normally1=P2, P3=0；When singlephase earth fault occurs for the exchange side bus of Inverter Station, the exchange side bus
Voltage can decline, and the reception power of Inverter Station reduces, and the transmission power of converting plant remains unchanged at this time, it is therefore desirable to which starting is dynamic
State lets out energy branch to consume extra power.
Referring to figs. 1 and 2, one of the preferred embodiment in the utility model direct current lets out energy branch, is configured at high pressure
In DC transmission system, comprising: the first dynamic lets out energy branch and the second dynamic lets out energy branch；
First dynamic is let out can the input terminal of branch and the anode of the HVDC transmission system DC power transmission line
Electrical connection, the output end that first dynamic lets out energy branch are electrically connected and connect with the input terminal that second dynamic lets out energy branch
Ground, the output end that second dynamic lets out energy branch are electrically connected with the cathode of the HVDC transmission system transmission line of electricity；
It includes the first thyristor groups circuit and the first arrester group, first thyristor that first dynamic, which lets out energy branch,
The first end of group circuit is electrically connected with the anode of the HVDC transmission system DC power transmission line, first thyristor groups
The second end of circuit is electrically connected with the first end of the first arrester group, the second end of the first arrester group and described the
The input terminal that two dynamics let out energy branch is electrically connected and is grounded；
It includes the second thyristor groups circuit and the second arrester group, second thyristor that second dynamic, which lets out energy branch,
Group circuit first end be electrically connected with the first end of the second arrester group, the second end of the second arrester group with it is described
The cathode of HVDC transmission system DC power transmission line is electrically connected.
In the utility model embodiment, first dynamic lets out energy branch and lets out energy branch with phase with second dynamic
Same structure, is intended merely to make it differentiation using the describing mode of " first ", " second ", without restriction effect.
The direct current of the utility model embodiment lets out energy branch, and the positive or negative pole passed through in DC power transmission line accesses brilliant lock
Pipe group and arrester group, while letting out energy branch for dynamic and constructing a grounding point, the electricity at component both ends can be effectively reduced
Pressure；When the HVDC transmission system breaks down, starts the dynamic and let out energy branch, can be consumed by arrester group
Excess power in transmission, thus guarantee component normal operation and DC transmission system after Failure elimination it is quick extensive
It is multiple.
In the utility model embodiment, the first thyristor groups circuit includes the first brilliant lock that several are connected in series
Pipe group, wherein first thyristor groups include M thyristor, M >=1.
In the utility model embodiment, the second thyristor groups circuit includes the second brilliant lock that several are connected in series
Pipe group, wherein second thyristor groups include N number of thyristor, N >=1.
In the utility model embodiment, the arrester quantity in the first arrester group is m, and m arrester
Between it is in parallel in the same direction, and be connected in parallel between the positive and negative anodes of the HVDC transmission system DC power transmission line jointly, wherein m >=
1。
In the utility model embodiment, the arrester quantity in the second arrester group is n, and n arrester
Between it is in parallel in the same direction, and be connected in parallel between the positive and negative anodes of the HVDC transmission system DC power transmission line jointly, wherein n >=
1。
In the utility model embodiment, energy branch is let out because using arrester and the combination for letting out energy resistance, arrester is used as
Start stop switch, after the failure occurred, due to the generation of overvoltage, arrester autonomous action, high current lets out energy by arrester
Resistance is released.After failure, arrester restores, and letting out can branch recovery high-impedance state.With use thyristor or IGBT
Etc. power electronic devices as switch let out can branch compare, in the utility model let out can branch structure it is more simple, cost
Lower, reliability is higher.
To sum up, the direct current in the utility model embodiment lets out energy branch, including the first dynamic lets out energy branch and the second dynamic
Letting out can branch；First dynamic is let out can the input terminal of branch and the anode of the HVDC transmission system DC power transmission line
Electrical connection, the output end that first dynamic lets out energy branch are electrically connected and connect with the input terminal that second dynamic lets out energy branch
Ground, the output end that second dynamic lets out energy branch are electrically connected with the cathode of the HVDC transmission system transmission line of electricity；Institute
State the first dynamic let out can branch include the first thyristor groups circuit and the first arrester group, the of the first thyristor groups circuit
One end is electrically connected with the anode of the HVDC transmission system DC power transmission line, and the second of the first thyristor groups circuit
End is electrically connected with the first end of the first arrester group, and the second end of the first arrester group and second dynamic let out energy
The input terminal of branch is electrically connected and is grounded；It includes the second thyristor groups circuit and the second arrester that second dynamic, which lets out energy branch,
Group, the first end of the second thyristor groups circuit are electrically connected with the first end of the second arrester group, and described second is lightning-arrest
The second end of device group is electrically connected with the cathode of the HVDC transmission system DC power transmission line.By DC line just
Pole accesses several series thyristor groups and lets out energy resistance, while letting out energy branch for dynamic and constructing a grounding point, Neng Gouyou
Effect ground reduces the voltage at component both ends, guarantees the normal operation of component.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without deviating from the technical principle of the utility model, several improvement and replacement can also be made, these change
It also should be regarded as the protection scope of the utility model into replacement.
Claims (6)
1. a kind of direct current lets out energy branch, it is configured at HVDC transmission system characterized by comprising the first dynamic, which is let out, to prop up
Road and the second dynamic are let out can branch；
The anode that first dynamic lets out the input terminal and the HVDC transmission system DC power transmission line of energy branch is electrically connected
It connects, the output end that first dynamic lets out energy branch is electrically connected and is grounded, institute with the input terminal that second dynamic lets out energy branch
State the second dynamic let out can the output end of branch be electrically connected with the cathode of the HVDC transmission system transmission line of electricity；
It includes the first thyristor groups circuit and the first arrester group, the first thyristor groups electricity that first dynamic, which lets out energy branch,
The first end on road is electrically connected with the anode of the HVDC transmission system DC power transmission line, the first thyristor groups circuit
Second end be electrically connected with the first end of the first arrester group, the second end of the first arrester group and described second dynamic
The input terminal that state lets out energy branch is electrically connected and is grounded；
It includes the second thyristor groups circuit and the second arrester group, the second thyristor groups electricity that second dynamic, which lets out energy branch,
The first end on road is electrically connected with the first end of the second arrester group, the second end and the high pressure of the second arrester group
The cathode of DC transmission system DC transmission line of electricity is electrically connected.
2. direct current as described in claim 1 lets out energy branch, which is characterized in that the first thyristor groups circuit includes several
The first thyristor groups being connected in series, wherein first thyristor groups include M thyristor, M >=1.
3. direct current as described in claim 1 lets out energy branch, which is characterized in that the second thyristor groups circuit includes several
The second thyristor groups being connected in series, wherein second thyristor groups include N number of thyristor, N >=1.
4. direct current as described in claim 1 lets out energy branch, which is characterized in that the arrester quantity in the first arrester group
It is m, and in parallel in the same direction between m arrester, and is connected in parallel on the HVDC transmission system DC power transmission line jointly just
Between cathode, wherein m >=1.
5. direct current as described in claim 1 lets out energy branch, which is characterized in that the arrester quantity in the second arrester group
It is n, and in parallel in the same direction between n arrester, and is connected in parallel on the HVDC transmission system DC power transmission line jointly just
Between cathode, wherein n >=1.
6. a kind of HVDC transmission system, which is characterized in that including converting plant, Inverter Station, DC line and as right is wanted
Asking 1 to 5 described in any item direct currents to let out can branch；Wherein, the converting plant and the Inverter Station include that modular multilevel changes
Flow device；The modularization multi-level converter of positive, the described Inverter Station of the modularization multi-level converter of the converting plant is just
Pole is connected with the DC line；The module of the cathode of the modularization multi-level converter of the converting plant, the Inverter Station
The cathode for changing multilevel converter is connected with the DC line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821409545.8U CN208739024U (en) | 2018-08-29 | 2018-08-29 | Direct current is let out can branch and HVDC transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821409545.8U CN208739024U (en) | 2018-08-29 | 2018-08-29 | Direct current is let out can branch and HVDC transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208739024U true CN208739024U (en) | 2019-04-12 |
Family
ID=66031833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821409545.8U Active CN208739024U (en) | 2018-08-29 | 2018-08-29 | Direct current is let out can branch and HVDC transmission system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208739024U (en) |
-
2018
- 2018-08-29 CN CN201821409545.8U patent/CN208739024U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2016107616A1 (en) | Apparatus for preventing capacitance overvoltage in voltage-source type inverter | |
| CN107846036B (en) | High-voltage flexible direct-current transmission system and main loop equipment determination method thereof | |
| CN206099366U (en) | Ambipolar photovoltaic power generation system | |
| CN113708654B (en) | Flexible direct current converter valve integrating surplus power dissipation function and control method | |
| CN112217403B (en) | Extra-high voltage flexible direct current conversion unit arrangement structure with bridge arm reactor on direct current side | |
| EP3446400A1 (en) | Converter arrangement | |
| CN105680476A (en) | Direct-current boost concentrated inversion photovoltaic power generation system | |
| CN106160545B (en) | A kind of bridge arm hybrid bipolar modular multi-level converter | |
| CN103427658A (en) | High-voltage DC-DC conversion device based on multi-winding transformer | |
| CN108321828B (en) | Current source-mixed voltage source series type current converter topology | |
| CN215835111U (en) | Direct-current ice melting system applied to overhead ground wire and direct-current ice melting equipment thereof | |
| EP3916975A2 (en) | Conversion device | |
| CN102882393B (en) | Power supply device for converter valve of static VAR generator | |
| CN208739024U (en) | Direct current is let out can branch and HVDC transmission system | |
| CN217720738U (en) | Permanent fault ride-through system for offshore flexible direct-current submarine cable | |
| CN108599228B (en) | Flexible direct current transmission converter and bipolar flexible direct current transmission system | |
| CN208241326U (en) | A kind of extra-high voltage flexible direct-current transmission converter device | |
| US20220200290A1 (en) | Power System | |
| CN215267650U (en) | Low-frequency power transmission system based on grounding structure | |
| CN208754000U (en) | Direct current is let out can branch and HVDC transmission system | |
| CN208690930U (en) | Direct current is let out can branch and HVDC transmission system | |
| CN108242896A (en) | Transverter, DC side ground connection tertiary structure flexible direct current system and control method | |
| EP3916980A1 (en) | Conversion device | |
| CN208369224U (en) | Bidirectional, dc transmission system is pressed in one kind | |
| CN107546984A (en) | A kind of high-power modular HVDC converter of integrating filtering transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |