CN205681111U - A kind of novel current-limiting type power flow control system - Google Patents
A kind of novel current-limiting type power flow control system Download PDFInfo
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- CN205681111U CN205681111U CN201620477785.6U CN201620477785U CN205681111U CN 205681111 U CN205681111 U CN 205681111U CN 201620477785 U CN201620477785 U CN 201620477785U CN 205681111 U CN205681111 U CN 205681111U
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Abstract
This utility model relates to technical field of electric power, particularly relates to a kind of novel current-limiting type power flow control system.This novel current-limiting type power flow control system includes shunt transformer, parallel connection converter, series transformer, series coupled transformator and current limiter module；The side of parallel connection converter transformator in parallel is connected with network system, and the opposite side of parallel connection converter is connected with series transformer side, and is provided with electric capacity between parallel connection converter and series transformer；Series transformer opposite side and current limiter module are connected by series coupled transformer secondary, and series transformer opposite side accesses network system by series coupled transformer primary side；Novel current-limiting type power flow control system of the present utility model can reduce the short circuit mute time, reduces component parameters and reduces the short circuit current impact to electrical network.
Description
Technical field
This utility model relates to technical field of electric power, particularly relates to a kind of novel current-limiting type power flow control system.
Background technology
Current-limiting type THE UPFC (UPFC), also known as UPFC-FCL, is that one can be simultaneously to line voltage distribution, impedance
It is adjusted with phase angle, the novel FACTS (flexible flexible AC transmitting system) of short-circuit fault of power system can be successfully managed again
Device, which increases the control flexibility ratio of power system, adds the conveying capacity of circuit, ensured the safety of device and electrical network
Property, therefore suffer from the extensive concern of academia.Existing current-limiting type THE UPFC, comes into 10kV/1MVA at present
In the prototype experiment stage, it is made up of, just UPFC module (current-limiting type Unified Power Flow control module) and Bridge Type Solid State Current Limiter module
Be equivalent to UPFC when often running, during system short-circuit, can excise fault in 20ms, open-circuit line, but its short-circuit mute time still have
Wait to reduce, its device parameters and relatively costly.
Therefore, for above not enough, it is desirable to provide a kind of novel current-limiting type power flow control system.
Utility model content
(1) to solve the technical problem that
The purpose of this utility model is to provide a kind of novel current-limiting type power flow control system to reduce short-circuit mute time, fall
Low cost and the reduction short circuit current impact to electrical network.
(2) technical scheme
In order to solve above-mentioned technical problem, this utility model provides a kind of novel current-limiting type power flow control system, its bag
Include shunt transformer, parallel connection converter, series transformer, series coupled transformator and current limiter module；The one of parallel connection converter
Side transformator in parallel is connected with network system, and the opposite side of parallel connection converter is connected with series transformer side, and in parallel
Being provided with electric capacity between changer and series transformer, parallel connection converter, electric capacity and series transformer constitute the unified tide of current-limiting type
Flow control module；Series transformer opposite side and current limiter module are connected by series coupled transformer secondary, and change of connecting
Parallel operation opposite side accesses network system by series coupled transformer primary side.
Wherein, described current limiter module includes fly-wheel diode, integrated gate commutated thyristor module, current-limiting inductance and not
Control rectifier bridge, uncontrollable rectifier bridge is connected with described series coupled transformer secondary, after fly-wheel diode is in parallel with current-limiting inductance and
Described integrated gate commutated thyristor block coupled in series, fly-wheel diode and described integrated gate commutated thyristor module with described not
Control rectifier bridge is in parallel.
Wherein, described uncontrollable rectifier bridge is the three-phase bridge rectification bridge being made up of multiple commutation diodes.
Wherein, it is provided with the first inductance between side and the described shunt transformer of described parallel connection converter.
Wherein, it is provided with the second inductance between described series transformer and described series coupled transformator.
Wherein, described electric capacity is DC capacitor, and described DC capacitor is connected in parallel on described parallel connection converter and series transformer
Between.
(3) beneficial effect
Technique scheme of the present utility model has the advantage that the novel current-limiting type trend control that this utility model provides
In system processed, time properly functioning, current limiter module presents zero impedance, and device is operated in Current limited Control pattern (UPFC pattern)；When
When three-phase shortcircuit occurs in network system node k, overwhelming majority system voltage is applied on series coupled transformator, forces current limiter
Module is inserted network system and is carried out current limliting；After fault being detected, control system can block the institute of UPFC module and current limiter module
Having triggering pulse, current limiter module to be equivalent to open circuit, short trouble is thoroughly excised.
Specifically, time properly functioning, integrated gate commutated thyristor module often adds triggering pulse, and series coupled transformator is secondary
Limit electric current magnetizes to current-limiting inductance through uncontrollable rectifier bridge, and the process of magnetizing terminates, and current-limiting inductance electric current will keep constant, current-limiting inductance
Electric current carries out afterflow with the difference of series transformer secondary current by fly-wheel diode, and current-limiting inductance is equivalent to be shorted, limit
Stream device module externally presents zero impedance；When network system electric current occurs that short time little scope fluctuates, current-limiting inductance can be by string
Connection transformator seals in network system and carries out discharge and recharge, and after of short duration dynamic process, continues and network system alternating current peak
Value keeps consistent, no longer affects the properly functioning of UPFC module；Novel current-limiting type power flow control system of the present utility model can subtract
Few short circuit mute time, reduce component parameters and reduce the short circuit current impact to electrical network.
Accompanying drawing explanation
Fig. 1 is the topological diagram of this utility model embodiment novel current-limiting type power flow control system.
In figure, 1: shunt transformer；2: parallel connection converter；3: DC capacitor；4: series transformer；5: the unified tide of current-limiting type
Flow control module；6: series coupled transformator；7: current limiter module.
Detailed description of the invention
With embodiment, detailed description of the invention of the present utility model is described in further detail below in conjunction with the accompanying drawings.Following reality
Execute example for this utility model is described, but be not limited to scope of the present utility model.
In description of the present utility model, it is to be understood that term " on ", D score, "front", "rear", " vertically ", " water
Flat ", the orientation that indicates of " top ", " end " " interior ", " outward " etc. or position relationship be based on orientation shown in the drawings or position relationship, only
It is for the ease of description this utility model and to simplify description rather than instruction or imply that the device of indication or element must have spy
Fixed orientation, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.Additionally, term " the
One ", " second " be only used for describe purpose, and it is not intended that instruction or hint relative importance.
In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, term " peace
Dress ", should be interpreted broadly " being connected ", " connection ", for example, it may be fix connection, it is also possible to be to removably connect, or integratedly
Connect；Can be to be mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
Language concrete meaning in this utility model.
As it is shown in figure 1, the novel current-limiting type power flow control system that this utility model provides includes shunt transformer 1, parallel connection
Changer 2, series transformer 4, series coupled transformator 6 and current limiter module 7；The side of parallel connection converter 2 becomes in parallel
Depressor 1 is connected with network system, and the opposite side of parallel connection converter 2 is connected with series transformer 4 side, and parallel connection converter 2 with
Being provided with electric capacity between series transformer 4, parallel connection converter 2, electric capacity and series transformer 4 constitute current-limiting type Unified Power Flow and control
Module 5 (UPFC module)；Series transformer 4 opposite side and current limiter module 7 are connected by series coupled transformator 6 secondary, and
And series transformer 4 opposite side accesses network system by the former limit of series coupled transformator 6；Wherein, described electric capacity is unidirectional current
Holding 3, described DC capacitor 3 is connected in parallel between described parallel connection converter 2 and series transformer 4.
In above-described embodiment, time properly functioning, current limiter module 7 presents zero impedance, and device is operated in Current limited Control pattern
(UPFC pattern).When three-phase shortcircuit occurs in network system node k, overwhelming majority system voltage is applied to series coupled transformator
On 6, force current limiter module 7 to insert network system and carry out current limliting.After fault being detected, control system can block UPFC module and
All triggering pulses of current limiter module 7, current limiter module 7 is equivalent to open circuit, and short trouble is thoroughly excised.
Specifically, described current limiter module 7 includes sustained diode7, integrated gate commutated thyristor module T8, current limliting electricity
Sense LdWith uncontrollable rectifier bridge, uncontrollable rectifier bridge is connected with described series coupled transformator 6 secondary, fly-wheel diode and current-limiting inductance
With described integrated gate commutated thyristor block coupled in series after parallel connection, fly-wheel diode and described integrated gate commutated thyristor module
In parallel with described uncontrollable rectifier bridge.Wherein uncontrollable rectifier bridge includes commutation diode D1、D2、D3、D4、D5And D6。
Time properly functioning, integrated gate commutated thyristor module (IGCT module) T8Often adding triggering pulse, series coupled becomes
Depressor 6 secondary current is through uncontrollable rectifier bridge D1—D6Magnetize to current-limiting inductance, until current-limiting inductance electric current IdReach system alternating current
Stream peak value, hereafter the process of magnetizing terminates, and current-limiting inductance electric current will keep constant, IdLead to the difference of series transformer secondary current
Cross continued flow tube D7Carrying out afterflow, current-limiting inductance is equivalent to be shorted, and ignores current-limiting inductance resistance and IGCT, IGCT on-state voltage drop
After, current limiter module 7 externally presents zero impedance.Whole current-limiting type UPFC device is equivalent to conventional UPFC and is running.
When network system electric current occurs that short time little scope fluctuates (such as the start and stop of motor, short time Voltage Drop
Deng), current-limiting inductance can seal in network system by series transformer and carry out discharge and recharge, and after of short duration dynamic process, continues
Keep consistent with network system alternating current peak value, no longer affect the properly functioning of UPFC module.Current-limiting inductance is the least, this transient state
Process duration is the shortest.
Specifically, described uncontrollable rectifier bridge is the three-phase bridge rectification bridge being made up of multiple commutation diodes, the most above-mentioned
D1、D2、D3、D4、D5And D6；It is provided with the first inductance L between side and the described shunt transformer 1 of described parallel connection converter 21；
The second inductance L it is provided with between described series transformer 4 and described series coupled transformator2。
Short circuit current limitation principle in this utility model: for the purpose of protection UPFC, no matter which kind of network system occurs short
Road, all should make the rapid action of current limiter, excises the system failure；When node k occurs three-phase shortcircuit, ignoring the feelings of line impedance
Under condition, whole network system voltages can be applied on series coupled transformator 6, and is executed by current limiter module 7 uncontrollable rectifier bridge
It is added between DC side M, N 2, forces sustained diode7Bearing back-pressure and turn off, current-limiting inductance is rapidly inserted into network system
Carrying out current limliting, its inductive current is direction flowing as shown in arrow in Fig. 1.Meanwhile, after control system detects and confirms fault, meeting
Block IGCT pipe T immediately8With all triggering pulses of UPFC module, IGCT will complete turn off process in 10 μ s, and current limiter is straight
Stream side electric current can drop to rapidly zero, and short trouble is the most cut, and current limiter module 7 is equivalent to open a way, and current-limiting inductance electric current meeting
Zero is decayed to by fly-wheel diode afterflow within a short period of time；The length of whole current limliting process depends on that sensor is sensitive
Degree, sampling period and the calculating speed of controller.
The above is only preferred implementation of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of without departing from this utility model know-why, it is also possible to make some improvement and modification, these change
Enter and also should be regarded as protection domain of the present utility model with modification.
Claims (6)
1. a novel current-limiting type power flow control system, it is characterised in that: it includes shunt transformer, parallel connection converter, series connection
Changer, series coupled transformator and current limiter module；The side of parallel connection converter transformator in parallel is with network system even
Connecing, the opposite side of parallel connection converter is connected with series transformer side, and is provided with between parallel connection converter and series transformer
Electric capacity, parallel connection converter, electric capacity constitute current-limiting type Unified Power Flow control module with series transformer；Series transformer opposite side and
Current limiter module is connected by series coupled transformer secondary, and series transformer opposite side is by series coupled transformer primary
Network system is accessed on limit.
Novel current-limiting type power flow control system the most according to claim 1, it is characterised in that: described current limiter module includes
Fly-wheel diode, integrated gate commutated thyristor module, current-limiting inductance and uncontrollable rectifier bridge, uncontrollable rectifier bridge and described coupling of connecting
Conjunction transformer secondary connects, with described integrated gate commutated thyristor block coupled in series after fly-wheel diode is in parallel with current-limiting inductance,
Fly-wheel diode and described integrated gate commutated thyristor module are in parallel with described uncontrollable rectifier bridge.
Novel current-limiting type power flow control system the most according to claim 2, it is characterised in that: described uncontrollable rectifier bridge is served as reasons
The three-phase bridge rectification bridge of multiple commutation diodes composition.
Novel current-limiting type power flow control system the most according to claim 1, it is characterised in that: the one of described parallel connection converter
The first inductance it is provided with between side and described shunt transformer.
Novel current-limiting type power flow control system the most according to claim 1, it is characterised in that: described series transformer and institute
State and between series coupled transformator, be provided with the second inductance.
Novel current-limiting type power flow control system the most according to claim 1, it is characterised in that: described electric capacity is unidirectional current
Holding, described DC capacitor is connected in parallel between described parallel connection converter and series transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620477785.6U CN205681111U (en) | 2016-05-24 | 2016-05-24 | A kind of novel current-limiting type power flow control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620477785.6U CN205681111U (en) | 2016-05-24 | 2016-05-24 | A kind of novel current-limiting type power flow control system |
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| Publication Number | Publication Date |
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| CN205681111U true CN205681111U (en) | 2016-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620477785.6U Expired - Fee Related CN205681111U (en) | 2016-05-24 | 2016-05-24 | A kind of novel current-limiting type power flow control system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106505531A (en) * | 2016-12-29 | 2017-03-15 | 国网浙江省电力公司绍兴供电公司 | A kind of current-limiting type UPFC protection systems |
| CN106787656A (en) * | 2016-12-29 | 2017-05-31 | 国网浙江省电力公司绍兴供电公司 | A kind of current-limiting type UPFC DC side overvoltage protective systems |
| CN106787655A (en) * | 2016-12-29 | 2017-05-31 | 国网浙江省电力公司绍兴供电公司 | A kind of current-limiting type UPFC DC side overvoltage protection circuits |
| CN108767830A (en) * | 2018-06-12 | 2018-11-06 | 国网江苏省电力有限公司电力科学研究院 | A kind of mixed type fault current controllers based on THE UPFC |
-
2016
- 2016-05-24 CN CN201620477785.6U patent/CN205681111U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106505531A (en) * | 2016-12-29 | 2017-03-15 | 国网浙江省电力公司绍兴供电公司 | A kind of current-limiting type UPFC protection systems |
| CN106787656A (en) * | 2016-12-29 | 2017-05-31 | 国网浙江省电力公司绍兴供电公司 | A kind of current-limiting type UPFC DC side overvoltage protective systems |
| CN106787655A (en) * | 2016-12-29 | 2017-05-31 | 国网浙江省电力公司绍兴供电公司 | A kind of current-limiting type UPFC DC side overvoltage protection circuits |
| CN108767830A (en) * | 2018-06-12 | 2018-11-06 | 国网江苏省电力有限公司电力科学研究院 | A kind of mixed type fault current controllers based on THE UPFC |
| CN108767830B (en) * | 2018-06-12 | 2020-03-10 | 国网江苏省电力有限公司电力科学研究院 | Mixed type fault current controller based on unified power flow controller |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161109 Termination date: 20180524 |