CN107994584A - A kind of major loop wiring construction of compensator - Google Patents
A kind of major loop wiring construction of compensator Download PDFInfo
- Publication number
- CN107994584A CN107994584A CN201711215334.0A CN201711215334A CN107994584A CN 107994584 A CN107994584 A CN 107994584A CN 201711215334 A CN201711215334 A CN 201711215334A CN 107994584 A CN107994584 A CN 107994584A
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- Prior art keywords
- transformer
- series
- winding
- major loop
- switch
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Classifications
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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
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
-
- 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/48—Controlling the sharing of the in-phase component
Abstract
The invention discloses a kind of major loop wiring construction of compensator, parallel inverter accesses the three-phase bus of power grid by shunt transformer, series connection transverter is serially accessed to the circuit by series transformer, parallel inverter is connected with series connection transverter by direct current positive and negative anodes busbar, bridging by-pass switch is configured in series transformer line side and valve side winding both ends, in shunt transformer enter line side and valve side, configuration switchs on the inlet wire of series transformer line side winding and outlet, start-up circuit is located between parallel valve side switch and parallel inverter, thyristor bypass switch is connected across between the winding of series transformer valve side.The present invention, which can realize, adjusts the accurate of Line Flow；Control response speed is fast, can improve the transient stability and steady-state behaviour of system；Control circuit reactive power that can be independent, keeps reactive power constant or according to power grid demand adjusting circuit reactive power, improves system transmission performance in adjusting circuit active power.
Description
Technical field
The present invention relates to a kind of major loop wiring construction of compensator, belong to electric system technical field of electric power transmission.
Background technology
Electric system develops rapidly, as load constantly increases, grid structure is increasingly complicated, new energy accesses on a large scale,
The problems such as trend skewness, voltage support scarce capacity, short circuit current flow are excessive, electromechanical oscillations is often interweaved, to power grid
Operation control brings new challenge.Due to the saturation in corridor and the commercial operation of grid company of transmitting electricity, new by construction
Transmission line of electricity come increase transmission line capability will be more and more difficult.
FACTS refers to using power electronic equipment and other static controllers to improve system controllability and measurability and power delivering capability
AC transmission system, for solve problem above provide scheme.UPFC（THE UPFC）It is the allusion quotation of comprehensive FACTS
Type represents, and be otherwise known as third generation FACTS technologies.UPFC has all functions such as voltage adjusting, series compensation and phase shifting control,
And quickly control the active and reactive power of transmission line of electricity.
Compensator major loop wiring design is its Design of Engineering Systems, device fabrication and the basis of experiment.Therefore, based on allusion quotation
The compensator topological structure of type, with reference to the particularity of transformer device structure, proposes a kind of suitable for exemplary compensation device topological structure
Major loop mode of connection.
The content of the invention
Purpose：In order to overcome the deficiencies in the prior art, the present invention provides a kind of major loop wiring knot of compensator
Structure.
Technical solution：In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of major loop wiring construction of compensator, parallel inverter access the three-phase bus of power grid, string by shunt transformer
Connection transverter seals in charged line by series transformer, and parallel inverter passes through direct current positive and negative anodes busbar phase with transverter of connecting
Even, bridging by-pass switch is configured in series transformer line side and valve side winding both ends, in shunt transformer enter line side, valve side
Configuration switch, at least one configuration switch on the inlet wire of series transformer, outlet, start-up circuit be located at parallel valve side switch and
Between parallel inverter, thyristor bypass switch is connected across between the winding of series transformer valve side.
Preferably, the parallel inverter is voltage source converter with transverter of connecting, including：Two electricity
Flat, three level, transformer multiple inverter configuration and modular multilevel structure.
Preferably, the start-up circuit is formed by resistance and switch in parallel, and switch includes：Isolation switch or open circuit
Device.
Preferably, the high pressure side switch split-phase is connected across each phase winding two in series transformer line side
End, low-pressure side by-pass switch split-phase are connected across each phase winding both ends in series transformer valve side.
Preferably, the thyristor bypass switch split-phase is connected across each phase winding both ends in series transformer valve side,
Thyristor bypass switch includes：Antiparallel thyristor.
Preferably, a switch is at least configured in the inlet wire of series transformer line side winding and outlet,
Stop transport and overhaul so as to series transformer.
Preferably, the parallel inverter, connect transverter positive and negative anodes outlet on configure disconnecting link, so as to
Positive and negative anodes dc bus is isolated.
Preferably, the side start-up circuit in parallel and parallel inverter reactance, series transformer valve side winding with
Disconnecting link is configured between series connection transverter reactance.
Preferably, the outgoing line side configuration disconnecting link of the series transformer of the charged line.
Preferably, arrester is bridged between the winding terminal of the series transformer line side and valve side.
Preferably, the series transformer winding terminal, charged line series transformer outgoing line side, in parallel become
Depressor alternating current net side, shunt transformer transverter side, the alternating current-direct current side of transverter and converter valve bottom configuration ground connection are lightning-arrest
Device.
Preferably, the shunt transformer net side, shunt transformer valve side, parallel valve side switch and start-up circuit
Between, series transformer line side winding inlet wire, the winding outlet of series transformer line side, series transformer valve side winding, quilt
Control the enter line side of series transformer of circuit, configure current transformer in the valve arm of transverter.
Preferably, low-pressure side by-pass switch, arrester and the crystalline substance of the series transformer valve side winding bridging
Current transformer is configured on three branches of brake tube by-pass switch, and current transformer is configured after four branches collect.
Preferably, when the shunt transformer is grounded with series transformer by neutral ground circuit, in
Current transformer is configured on property point earth-return circuit；When the series transformer includes balance winding, configured on balance winding
Current transformer.
Preferably, the shunt transformer high-pressure side, series transformer line side winding inlet wire on configure electricity
Press mutual inductor.
Preferably, the outgoing line side of the series transformer of the charged line, parallel inverter and transverter of connecting
Exchange side, transverter positive and negative anodes outlet on configure current transformer, voltage transformer.
Beneficial effect：A kind of major loop wiring construction of compensator provided by the invention, basic regulatory function are changed by parallel connection
Flow device and series connection transverter collective effect is realized, wherein parallel inverter exports compensation electric current through shunt transformer, the change of current of connecting
Device is concatenated transformer, exports offset voltage, and amplitude is continuous, 360 degree of phase is adjustable, can realize and the accurate of Line Flow is adjusted
Section；Control response speed is fast, can improve the transient stability and steady-state behaviour of system；The idle work(of control circuit that can be independent
Rate, keeps reactive power constant or according to power grid demand adjusting circuit reactive power, improves in adjusting circuit active power
System transmission performance.
When fault in ac transmission system occurs, Control protection system locking transverter, while thyristor bypass switch unlocks, is low
Side by-pass switch is pressed to close a floodgate, high pressure side switch closes a floodgate, the equipment safety of guarantee compensator major loop.Series transformer into
At least one configuration switch series transformer, which is stopped transport, on line, outlet overhauls, and goes out in the positive and negative anodes of parallel inverter, transverter of connecting
Disconnecting link is configured on line, to isolate with positive and negative anodes dc bus.And corresponding configuration arrester, current transformer, voltage are mutual
Sensor meets Control protection system demand.
Brief description of the drawings
Fig. 1 is the major loop wiring construction schematic diagram of the present invention.
Embodiment
The present invention is further described below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of major loop wiring construction of compensator, parallel inverter 1 access electricity by shunt transformer 2
The three-phase bus 3 of net, series connection transverter 4 seal in charged line 6, parallel inverter 1 and transverter of connecting by series transformer 5
4 are connected by direct current positive and negative anodes busbar 7, and bridging by-pass switch is configured in 5 line side of series transformer and valve side winding both ends
8, configure switch 9 in 2 enter line side of shunt transformer, valve side, on the inlet wire of series transformer 5, outlet at least one configuration open
9 are closed, start-up circuit 10 is located between parallel valve side switch 9 and parallel inverter 1, and thyristor bypass switch 11 is connected across series connection and becomes
Between 5 valve side winding of depressor.
The parallel inverter 1 is voltage source converter with transverter 4 of connecting, and includes but not limited to two level, three
Level, transformer multiple inverter configuration and modular multilevel structure.
The start-up circuit 10 is formed by resistance and switch in parallel, and switch includes but not limited to isolation switch and breaker.
The high pressure side switchs 8 split-phases and is connected across each phase winding both ends in 5 line side of series transformer, low-pressure side bypass
Switch 8 split-phases and be connected across each phase winding both ends in 5 valve side of series transformer.
11 split-phase of thyristor bypass switch is connected across each phase winding both ends in 5 valve side of series transformer, thyristor bypass
Switch 11 includes antiparallel thyristor.
A switch 9 is at least configured on the inlet wire of the 5 line side winding of series transformer and outlet, so as to series-transformer
Device, which is stopped transport, to be overhauled.
The parallel inverter 1, connect transverter 4 positive and negative anodes outlet on configure disconnecting link 12, so as to straight with positive and negative anodes
Flow busbar isolation.
Parallel connection side start-up circuit 10 and 1 reactance of parallel inverter, 5 valve side winding of series transformer and transverter of connecting
Disconnecting link 12 is configured between 4 reactance.
The outgoing line side configuration disconnecting link 12 of the series transformer 5 of the charged line 6.
Arrester 13 is bridged between 5 line side of series transformer and valve side winding terminal.
5 winding terminal of series transformer, outgoing line side, the shunt transformer 2 of series transformer 5 of charged line 6 exchange
Grid side, 5 transverter side of shunt transformer, the alternating current-direct current side of transverter and converter valve bottom configuration earth arrester 13.
2 net side of shunt transformer, 2 valve side of shunt transformer, parallel valve side switch between start-up circuit 10, connect
5 line side winding inlet wire of transformer, 5 line side winding outlet of series transformer, 5 valve side winding of series transformer, charged line 6
The enter line side of series transformer, current transformer 14 is configured in the valve arm of transverter.
Low-pressure side by-pass switch 8, arrester 13 and the thyristor bypass of the 5 valve side winding bridging of series transformer are opened
Configuration current transformer 14 on 11 3 branches is closed, and current transformer 14 is configured after four branches collect.
When the shunt transformer 2 is grounded with series transformer 5 by neutral ground circuit, in neutral ground circuit
Upper configuration current transformer 14；When the series transformer 5 includes balance winding, current transformer is configured on balance winding
14。
2 high-pressure side of shunt transformer, 5 line side winding of series transformer inlet wire on configure voltage transformer 15.
The outgoing line side of the series transformer 5 of the charged line 6, parallel inverter 1 and 4 exchange side of transverter of connecting, change
Flow and configure current transformer 14, voltage transformer 15 in the positive and negative anodes outlet of device.
The major loop operation principle of compensator of the present invention is as follows：Compensator regulatory function is by parallel inverter and the series connection change of current
Device collective effect realizes that the series connection transverter of compensator injects the controllable voltage vector of amplitude and phase angle to alternating current circuit,
Realize the accurate adjusting of Line Flow.Parallel inverter provides active power to series connection transverter, maintains DC voltage constant；Together
When send or absorbing reactive power, adjust ac bus voltage.Compensator control response speed is fast, can improve the transient state of system
Stability and steady-state behaviour, and can be independent control circuit reactive power, keep idle in adjusting circuit active power
Power is constant or according to power grid demand adjusting circuit reactive power, improves system transmission performance.
The above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (16)
- A kind of 1. major loop wiring construction of compensator, it is characterised in that：Parallel inverter accesses power grid by shunt transformer Three-phase bus, series connection transverter charged line is sealed in by series transformer, parallel inverter passes through straight with transverter of connecting Stream positive and negative anodes busbar is connected, and configures bridging by-pass switch in series transformer line side and valve side winding both ends, becomes in parallel connection Depressor enter line side, valve side configure switch, at least one configuration switch on the inlet wire of series transformer, outlet, start-up circuit position Between parallel valve side switch and parallel inverter, thyristor bypass switch is connected across between the winding of series transformer valve side.
- A kind of 2. major loop wiring construction of compensator according to claim 1, it is characterised in that：The parallel inverter It is voltage source converter with transverter of connecting, including：Two level, three level, transformer multiple inverter configuration and modularization More level blocks.
- A kind of 3. major loop wiring construction of compensator according to claim 1, it is characterised in that：The start-up circuit by Resistance is formed with switch in parallel, and switch includes：Isolation switch or breaker.
- A kind of 4. major loop wiring construction of compensator according to claim 1, it is characterised in that：The high pressure side Switch split-phase is connected across each phase winding both ends in series transformer line side, and low-pressure side by-pass switch split-phase is connected across series transformer Each phase winding both ends in valve side.
- A kind of 5. major loop wiring construction of compensator according to claim 1, it is characterised in that：The thyristor bypass Switch split-phase is connected across each phase winding both ends in series transformer valve side, and thyristor bypass switch includes：Antiparallel thyristor.
- A kind of 6. major loop wiring construction of compensator according to claim 1, it is characterised in that：The series transformer A switch is at least configured on the inlet wire of line side winding and outlet, stops transport and overhauls so as to series transformer.
- A kind of 7. major loop wiring construction of compensator according to claim 1, it is characterised in that：The parallel connection change of current Device, connect transverter positive and negative anodes outlet on configure disconnecting link, to isolate with positive and negative anodes dc bus.
- A kind of 8. major loop wiring construction of compensator according to claim 1, it is characterised in that：The parallel connection side starts Disconnecting link is configured between circuit and parallel inverter reactance, series transformer valve side winding and transverter reactance of connecting.
- A kind of 9. major loop wiring construction of compensator according to claim 1, it is characterised in that：The charged line The outgoing line side configuration disconnecting link of series transformer.
- A kind of 10. major loop wiring construction of compensator according to claim 1, it is characterised in that：The series-transformer Arrester is bridged between device line side and valve side winding terminal.
- A kind of 11. major loop wiring construction of compensator according to claim 1, it is characterised in that：The series-transformer Device winding terminal, charged line series transformer outgoing line side, shunt transformer alternating current net side, shunt transformer transverter Side, the alternating current-direct current side of transverter and converter valve bottom configuration earth arrester.
- A kind of 12. major loop wiring construction of compensator according to claim 1, it is characterised in that：The parallel pressure change Device net side, shunt transformer valve side, parallel valve side switch start-up circuit between, series transformer line side winding inlet wire, string Join transformer wire trackside winding outlet, series transformer valve side winding, the enter line side of series transformer of charged line, transverter Valve arm on configure current transformer.
- A kind of 13. major loop wiring construction of compensator according to claim 1, it is characterised in that：The series-transformer Current Mutual Inductance is configured on three the low-pressure side by-pass switch of device valve side winding bridging, arrester and thyristor bypass switch branches Device, and configure current transformer after four branches collect.
- A kind of 14. major loop wiring construction of compensator according to claim 1, it is characterised in that：The parallel pressure change When device is grounded with series transformer by neutral ground circuit, current transformer is configured on neutral ground circuit；It is described When series transformer includes balance winding, current transformer is configured on balance winding.
- A kind of 15. major loop wiring construction of compensator according to claim 1, it is characterised in that：The parallel pressure change Device high-pressure side, series transformer line side winding inlet wire on configure voltage transformer.
- A kind of 16. major loop wiring construction of compensator according to claim 1, it is characterised in that：The charged line The outgoing line side of series transformer, parallel inverter and transverter exchange side of connecting, transverter positive and negative anodes outlet on configure Current transformer, voltage transformer.
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| CN201711215334.0A CN107994584A (en) | 2017-11-28 | 2017-11-28 | A kind of major loop wiring construction of compensator |
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| CN201711215334.0A CN107994584A (en) | 2017-11-28 | 2017-11-28 | A kind of major loop wiring construction of compensator |
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| CN201711215334.0A Pending CN107994584A (en) | 2017-11-28 | 2017-11-28 | A kind of major loop wiring construction of compensator |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108521126A (en) * | 2018-05-28 | 2018-09-11 | 南京南瑞继保电气有限公司 | A kind of Hybrid power filter and its control method and device |
| CN108551173A (en) * | 2018-05-28 | 2018-09-18 | 南京南瑞继保电气有限公司 | A kind of series and parallel device and its control method and device |
| CN108777488A (en) * | 2018-05-28 | 2018-11-09 | 南京南瑞继保电气有限公司 | A kind of series compensator and its control method and device |
| CN111162558A (en) * | 2020-02-03 | 2020-05-15 | 国家电网有限公司 | Main wiring system of back-to-back symmetrical single-pole flexible-straight system and selection method thereof |
| CN112290573A (en) * | 2019-07-22 | 2021-01-29 | 全球能源互联网研究院有限公司 | Voltage drop compensation device and control method thereof |
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| CN111162558B (en) * | 2020-02-03 | 2021-11-23 | 国家电网有限公司 | Main wiring system of back-to-back symmetrical single-pole flexible-straight system and selection method thereof |
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Application publication date: 20180504 |