CN205945076U - Cascade compensation device - Google Patents
Cascade compensation device Download PDFInfo
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- CN205945076U CN205945076U CN201620892120.1U CN201620892120U CN205945076U CN 205945076 U CN205945076 U CN 205945076U CN 201620892120 U CN201620892120 U CN 201620892120U CN 205945076 U CN205945076 U CN 205945076U
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- phase
- compensation device
- series compensation
- voltage source
- reactor
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/10—Flexible AC transmission systems [FACTS]
Abstract
The utility model discloses a cascade compensation device. Contain two at least voltage source converter, two at least three -phase transformer and an at least three -phase reactor. Voltage source converter is through three -phase transformer many loop lines way of putting in series, and each voltage source converter's interchange side is through the three -phase reactor interconnection to realize a plurality of transverters and equallyd divide system's trend function. The application provides a device scheme can independently be installed in power transmission system and used as static synchronous series compensator, also can be as the put in series component parts of power transmission system device of unified power flow controller, convertible static compensator, space power flow controller and unified power quality conditioner. The transverter capacity can be saved to this device, improves cascade compensation device's application efficiency, the cost is reduced and area.
Description
Technical field
This utility model is related to flexible AC transmission field and in particular to a kind of series compensation device.
Background technology
The equipment of flexible AC transmitting system (FACTS) can be divided into series compensation device, paralleling compensating device and comprehensive control
Device processed.Wherein paralleling compensating device can be directly accessed in the electrical network of various grades, and series compensation device and Comprehensive Control
Device, due to need to connect access electrical network one end, needs combined reliability, motility and safety, studies its access way.
In series compensation device and composite control apparatus, SSSC (SSSC), THE UPFC
(UPFC), between line flow controller (IPFC) and convertible static compensator (CSC) be all can improve power transmitting capability and
The flexible transmission equipment of ability of regulation and control；Also have a kind of Research on Unified Power Quality Conditioner (UPQC), the electric energy matter of circuit can be improved
Amount.In addition to SSSC, other equipment has two inverters, and has corresponding transformator to complete to isolate and become
The functions such as pressure.Because SSSC, generally as a kind of additional method of operation of other devices, also can arrange
Enter similar.
The series compensation end of series compensation device or composite control apparatus at present, is all to access electricity by series transformer
Net.China 110kV and above electrical network major part adopt double-circuit line structure, and this is accomplished by two series transformers and two sets are connected
Compensation device is connected access double-circuit line respectively, and often covers series compensation device and be required to go by the current rating of each loop line to select
The amount of trying to please.In most occasions, total running current of double-circuit line is much smaller than double loop current rating sum, above-mentioned side
Case causes normal capacity serious waste when running, and certainly will increased cost of investment and floor space, overall losses also increase simultaneously
Greatly.To the electrical network using more loop line line structures, cost, occupation of land and equipment loss will further limit series compensation device
Application.In order to solve above deficiency, improve the economy that FACTS accesses electrical network, need a kind of string being more suitable for multi circuit transmission lines
Connection compensation device.
Utility model content
The purpose of this utility model, is to provide a kind of series compensation device being applied to multi circuit transmission lines, considers into
Originally, volume and equipment loss, meets economy and the reliability that FACTS accesses electrical network.
In order to reach above-mentioned purpose, solution of the present utility model is：
A kind of series compensation device, comprise at least two voltage source converters, at least two three-phase transformers, at least one
Three-phase reactor；The AC of described at least two voltage source converters passes through described at least one three-phase reactor interconnection；Institute
The side winding stating at least two three-phase transformers is connected to above-mentioned interconnected branches, and opposite side winding is connected respectively and accessed every loop line
Road.
A kind of above-mentioned series compensation device, the quantity of three-phase transformer is several equal with returning of circuit, and every three phase transformations
Depressor is connected by split-phase and is accessed a loop line road.
A kind of above-mentioned series compensation device, described voltage source converter all can be directly or by reactor and all three-phases
Transformator connects.
A kind of above-mentioned series compensation device, described three-phase transformer adopts star with the winding of voltage source converter connecting side
Type be directly grounded or star-like resistance grounded or angle-style connection.
A kind of above-mentioned series compensation device, when described three-phase transformer adopts three-phase integrated structure, includes one
The balance winding no-load running of angle-style.
A kind of above-mentioned series compensation device, between described voltage source converter and three-phase transformer, three-phase transformer with
Between transmission line of electricity and three-phase reactor branch road is provided with but is not limited to：In chopper, disconnecting link, spark gap, shunting device one
Plant or several or whole.
A kind of above-mentioned series compensation device, described shunting device be used for that AC system is alternate or line between bypass, concrete fill
It is set to disconnecting link or bypass breaker or thyristor valve or spark gap.
A kind of above-mentioned series compensation device, can independently installed in transmission system, also can as but be not limited to Unified Power Flow
Flow controller and Research on Unified Power Quality Conditioner between controller, convertible static compensator, SSSC, line
Series connection accesses the ingredient of transmission line of electricity device.
After such scheme, this utility model achieves the series compensation dress that system load flow divided equally by a kind of multiple inverter
Put.Transformator is divided into valve side winding and line side winding two parts, valve side winding converts total current and circuit to line side
The total current of side winding is equal, and the total current due to the multi circuit transmission lines in normal operation is always much smaller than N* circuit rated current,
The total current that the maximum possible only needing to be chosen as line current to the total current in line side is run converted by therefore all inverters
?；And adopting every loop line road to correspond to a series compensation device, then every series compensation device inverter is converted to line side
The electric current rated current that has to equal to circuit, that is, all inverter total currents be equal to N* circuit rated current；Using this reality
With new scheme, the total current of inverter can be much smaller than N* circuit rated current, that is, before identical output rated voltage
Put, the inverter capacity of this programme will improve series connection much smaller than conventional scheme it might even be possible to reduce the quantity of inverter
The operational efficiency of compensation device, saves equipment cost and the floor space of inverter, improves the economy that FACTS accesses electrical network
Property and reliability.
Brief description
Fig. 1 is a kind of wiring construction schematic diagram that this utility model applies in double-circuit line；
Fig. 2 is another kind of wiring construction schematic diagram that this utility model applies in double-circuit line；
Fig. 3 is a kind of Universal connection structural representation that this utility model applies in double-circuit line；
Fig. 4 is that this utility model applies a kind of Universal connection structural representation containing three inverters in double-circuit line；
Fig. 5 is a kind of Universal connection structural representation that this utility model applies on three loop line roads；
Fig. 6 is a kind of connection schematic diagram as THE UPFC ingredient for this utility model；
Specific embodiment
Below in conjunction with the accompanying drawings specific embodiment of the present utility model is described in detail.
This utility model provides a kind of series compensation device, comprise at least two voltage source converters, at least two three
Phase transformer, at least one three-phase reactor；The AC of described at least two voltage source converters passes through described at least one
Three-phase reactor interconnects；The side winding of described at least two three-phase transformers is connected to above-mentioned interconnected branches, and opposite side is around component
Every loop line road Chuan Lian not accessed.
As shown in figure 1, applying a kind of wiring construction schematic diagram in double-circuit line for this utility model, comprise three phase-change pressure
Device and voltage source converter each two and three-phase reactor one.Three-phase transformer is direct with the AC of voltage source converter
Connect, two connection branch roads are interconnected by three-phase reactor.
As shown in Fig. 2 applying another the wiring construction schematic diagram in double-circuit line for this utility model, comprise three phase transformations
Depressor, voltage source converter and each two of three-phase reactor.The inverter side of three-phase transformer is connected in parallel, then passes through three-phase electricity
Anti- device is connected with the AC of voltage source converter respectively.
A kind of aforesaid series compensation device, the quantity of three-phase transformer is several equal with returning of multi circuit transmission lines, and every three
Phase transformer is connected by split-phase and is accessed a loop line road.
A kind of aforesaid series compensation device, each voltage source converter all can be directly or by reactor and all three-phases
Transformator connects.
A kind of aforesaid series compensation device, the winding that three-phase transformer is connected with voltage source converter adopts star-like direct
Ground connection or the connection of star-like resistance grounded or angle-style.
A kind of aforesaid series compensation device, when three-phase transformer adopts three-phase integrated structure, includes an angle-style
Balance winding no-load running.
A kind of aforesaid series compensation device, between voltage source converter and three-phase transformer, three-phase transformer and transmission of electricity
Between circuit and three-phase reactor branch road is provided with but is not limited to：Chopper, disconnecting link, spark gap, shunting device are some or all
Equipment.
A kind of aforesaid series compensation device, shunting device be used for that AC system is alternate or line between bypass, concrete device is
Chopper or thyristor valve or spark gap.
As shown in figure 3, applying a kind of Universal connection structural representation in double-circuit line, wherein three-phase for this utility model
Transformator and each two of voltage source converter, reactor L1～L5 is optional reactor.It is embodied as：Reactor L1, L2, L5
In at least select a reactor, remaining is arbitrarily arranged in pairs or groups；Unselected is that wire connects with reactor position.
When single voltage source converter capacity is bigger than normal, can be by increasing inverter quantity come dilatation.As shown in figure 4, being
This utility model applies another the Universal connection structural representation in double-circuit line, wherein three-phase transformer two, voltage source
Inverter three, reactor L1～L6 is optional reactor.It is embodied as：An electricity is at least selected in reactor L1, L2, L5
Anti- device, at least selects a reactor in reactor L1, L5, L6, at least selects a reactor in reactor L2, L6, remaining
Arbitrarily arrange in pairs or groups；Unselected is that wire connects with reactor position.
As shown in figure 5, applying a kind of Universal connection structural representation on three loop line roads, wherein three-phase for this utility model
Three, transformator, fixed voltage source inverter two, optional voltage source converter 1, reactor L1～L8 is optional reactor.
When voltage source converter capacity requirement is less, can reduce by an inverter next cost-effective.It is embodied as：Three inverters
When, at least select a reactor in reactor L1, L2, L7, in reactor L1, L3, L7, L8, at least select a reactor,
At least a reactor is selected, remaining is arbitrarily arranged in pairs or groups and unselected reactor position is that wire connects in reactor L2, L3, L8；
During two inverters, in reactor L1, L2, L7, at least select a reactor, L3 reactor removes, and remaining is arbitrarily arranged in pairs or groups and not
Connected for wire from reactor position.
A kind of aforesaid series compensation device, can independently installed in transmission system, also can as but be not limited to Unified Power Flow
Flow controller and Research on Unified Power Quality Conditioner between controller, convertible static compensator, SSSC, line
Series connection accesses the ingredient of transmission line of electricity device.As shown in fig. 6, applying in double-circuit line and as unified for this utility model
A kind of mode of connection schematic diagram of flow controller ingredient, two of which series compensation device shares a side in parallel voltage
Source inverter and transformator.
After such scheme, this utility model achieves the series compensation dress that system load flow divided equally by a kind of multiple inverter
Put.Transformator is divided into valve side winding and line side winding two parts, valve side winding converts total current and circuit to line side
The total current of side winding is equal, and the total current due to the multi circuit transmission lines in normal operation is always much smaller than N* circuit rated current,
The total current that the maximum possible only needing to be chosen as line current to the total current in line side is run converted by therefore all inverters
?；And adopting every loop line road to correspond to a series compensation device, then every series compensation device inverter is converted to line side
The electric current rated current that has to equal to circuit, that is, all inverter total currents be equal to N* circuit rated current；Using this reality
With new scheme, the total current of inverter can be much smaller than N* circuit rated current, that is, before identical output rated voltage
Put, the inverter capacity of this programme will be much smaller than conventional scheme, or even part occasion can reduce the quantity of inverter, carries
The high operational efficiency of series compensation device, saves equipment cost and the floor space of inverter, improves FACTS and access electricity
The economy of net and reliability.
Finally it should be noted that：In conjunction with above-described embodiment, the technical solution of the utility model is only described rather than it is limited
System.Those of ordinary skill in the art are to be understood that：Those skilled in the art can be embodied as to of the present utility model
Mode is modified or equivalent, but these modifications or change are all being applied within pending patent requirements protection domain.
Claims (8)
1. a kind of series compensation device it is characterised in that：Comprise at least two voltage source converters, at least two three phase-change pressure
Device, at least one three-phase reactor；The AC of described voltage source converter is interconnected by described three-phase reactor, forms interconnection
Branch road；The side winding of described three-phase transformer is connected to above-mentioned interconnected branches, and opposite side winding is connected respectively and accessed every loop line road.
2. as claimed in claim 1 a kind of series compensation device it is characterised in that：The quantity of three-phase transformer is returned with circuit
Number is equal, and the side winding split-phase series connection of every three-phase transformer accesses a loop line road.
3. as claimed in claim 1 a kind of series compensation device it is characterised in that：Described voltage source converter all can directly or
It is connected with all three-phase transformers by reactor.
4. as claimed in claim 1 a kind of series compensation device it is characterised in that：Described three-phase transformer and voltage source converter
The winding of device connecting side using star-like be directly grounded or star-like resistance grounded or angle-style connection.
5. as claimed in claim 1 a kind of series compensation device it is characterised in that：Described three-phase transformer adopts three-phase integrated
Structure when, include the balance winding no-load running of an angle-style.
6. as claimed in claim 1 a kind of series compensation device it is characterised in that：Described voltage source converter and three phase-change pressure
Between device, between three-phase transformer and transmission line of electricity and three-phase reactor branch road is provided with chopper, disconnecting link, spark gap or side
One of road device or several or whole.
7. as claimed in claim 6 a kind of series compensation device it is characterised in that：Described shunting device is used for AC system phase
Between or line between bypass, concrete device be disconnecting link or bypass breaker or thyristor valve or spark gap.
8. as claimed in claim 1 a kind of series compensation device it is characterised in that：Described series compensation device independently installed in
Transmission system, or, as trend between THE UPFC, convertible static compensator, SSSC, line
One of controller and Research on Unified Power Quality Conditioner, series connection accesses the ingredient of transmission line of electricity device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620892120.1U CN205945076U (en) | 2016-08-16 | 2016-08-16 | Cascade compensation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620892120.1U CN205945076U (en) | 2016-08-16 | 2016-08-16 | Cascade compensation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205945076U true CN205945076U (en) | 2017-02-08 |
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ID=57918008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620892120.1U Active CN205945076U (en) | 2016-08-16 | 2016-08-16 | Cascade compensation device |
Country Status (1)
| Country | Link |
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| CN (1) | CN205945076U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106159976A (en) * | 2016-08-16 | 2016-11-23 | 南京南瑞继保电气有限公司 | A kind of series compensation device |
-
2016
- 2016-08-16 CN CN201620892120.1U patent/CN205945076U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106159976A (en) * | 2016-08-16 | 2016-11-23 | 南京南瑞继保电气有限公司 | A kind of series compensation device |
| WO2018033058A1 (en) * | 2016-08-16 | 2018-02-22 | 南京南瑞继保电气有限公司 | Series compensation device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |