CN1455486A - High-capacity controllable reactor - Google Patents
High-capacity controllable reactor Download PDFInfo
- Publication number
- CN1455486A CN1455486A CN 03128112 CN03128112A CN1455486A CN 1455486 A CN1455486 A CN 1455486A CN 03128112 CN03128112 CN 03128112 CN 03128112 A CN03128112 A CN 03128112A CN 1455486 A CN1455486 A CN 1455486A
- Authority
- CN
- China
- Prior art keywords
- current
- unit
- transformer
- current signal
- signal
- 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.)
- Granted
Links
Images
Landscapes
- Control Of Electrical Variables (AREA)
- Ac-Ac Conversion (AREA)
Abstract
The reactor comprises the current detecting unit I, the compensation current generating unit II, the transformer III, the main control unit IV, the current signal setter cell V. The said unit II comprises N identical subunits II'. Each subunit in the N identical subunits generates the compensation current alphai2/N in same magnitude and same phase, which is in opposite phase to the current signal ils on the generatrix at the primary side, in order to follow the signal ils. There are also N windings with same number of turns and same size at the second side. Each winding is conncted to the said subunits II'. Based on designed operating mode, the primary winding can be connected to a generatrix of power networks in serial or parallel, making the impedance of the transformer present the controlable change in (0 Zm) to a current. The invention uses devices with lower voltage and smaller current to produce controllable reactor suitable to operation at high voltage and larg current.
Description
Technical field
The invention belongs to the controlled reactor technical field, be specifically related to a kind of large-capacity controllable reactor.
Background technology
Up to now, controlled reactor mainly contains three classes: the first kind is TCR (thyristor-controlled reactor), and it produces strong harmonic current, can be for the single phase system triple harmonic current up to 30%, and price is also higher; The second class TCT (thyristor control transformer), it is a kind of distortion of TCR, its price is cheap than TCR, also can produce strong harmonic current, and is not suitable for the reactance adjustable range of broad; The 3rd class is direct current magnetic assist (magnetic valve type) controlled reactor, and it can produce strong harmonic current, and can produce stronger vibration and noise.Invented Regulatable reactor (application number: 00114356.5 the inventor in 2000 based on flux compensation, January 27 2000 applying date), the experimental study of theory analysis and low capacity experimental prototype shows, when opposite with the current phase of primary side at the electric current of Circuit Fault on Secondary Transformer injection, when its perunit value changes between (0 1), the equiva lent impedance Z that this transformer primary side AX port current presents
AxControllable variations between (0 Zm), Zm is the excitation impedance of transformer primary side.But, promptly have only a Zhi Luxiang series transformer secondary winding to inject the electric current of compensation because transformer has only a secondary winding in this controlled reactor.If when needed primary side current was big, secondary side current also can be bigger, owing to be subjected to the restriction of existing switching device capacity just can not produce jumbo controlled reactor.
Summary of the invention
The object of the present invention is to provide a kind of large-capacity controllable reactor that can overcome above-mentioned defective, it can adopt the device of low voltage, less electric current to satisfy needs under high pressure, the big electric current operating mode.
A kind of jumbo controlled reactor of the present invention mainly is made up of five unit: current detecting unit, offset current generating unit, transformer, main control unit, the given unit of current signal; Current detecting unit comprises the current transformer that is positioned on the transformer primary side bus, and the current detecting link that is connected with the current transformer output, and this unit detects current signal i from the bus current waveform
1SIt is characterized in that:
The current signal i of described current detecting link output
1SOutput to the given unit of current signal, main control unit output offset current factor alpha is to the given unit of current signal, and the given unit of current signal is according to i
1sProduce output current signal α i with two current signals of α
1S/ N;
Described offset current generating unit is made of N identical offset current generation subelement, N≤500, its input is connected with the output of the given unit of current signal, and N subelement all produces equal and opposite in direction, phase place is identical, and with transformer primary side bus on current signal i
1SThe offset current α i of antiphase
2/ N, follow current signal i automatically
1SWherein α is a penalty coefficient, i
2=-(W
1/ W
2) i
1, W
1Be the number of turn of transformer primary side, W
2The number of turn for the single winding of secondary side;
The secondary side of transformer is provided with N winding, and the number of turn of each winding is identical, and physical dimension equates, each winding is connected with subelement in the corresponding offset current generating unit; One time winding is connected on the electrical network bus, impedance controllable variations between (0 Zm) that transformer presents electric current.
The present invention has kept the advantage of prior art, only need from the power network current at transformer first side winding place, detect electric current (being fundamental current substantially), utilize compensation arrangement to produce identical with detected power frequency, as a to be in proportion offset current, compare with existing other technologies, it does not produce harmonic current, responds more stable.
In addition, the present invention also has the advantage of following two aspects:
(1) the present invention is provided with N winding in Circuit Fault on Secondary Transformer, and each winding disposes an offset current
Subelement takes place, be total to N subelement, this N the offset current equal and opposite in direction that subelement takes place
(be α i
2/ N), phase place is identical, but with the primary side current antiphase, thereby can utilize lower
The element manufacturing of voltage, less electric current is applicable to the controlled reactor under high pressure, the big electric current operating mode.
(2) the present invention is connected in transformer on the electrical network, when all importing in a Circuit Fault on Secondary Transformer N winding
Equal and opposite in direction, the electric current α i that phase place is identical
2When/N, α change between (1 0), transformer
Primary side AX port presents impedance Z to electric current
AxControllable variations between (0 Zm).
Description of drawings
Fig. 1 is the structural representation of reactor of the present invention;
Fig. 2 is the structural representation of a kind of embodiment of the present invention.
Embodiment
The present invention is further detailed explanation below in conjunction with accompanying drawing.
As shown in Figure 1, the said controlled reactor of the present invention mainly is made up of five unit: current detecting unit I, offset current generating unit II, transformer III, main control unit IV, the given unit V of current signal.Current detecting unit I comprises the current transformer 2 that is positioned on the transformer primary side electrical network bus 1, and the current detecting link 3 that is connected with current transformer 2 outputs.Offset current generating unit II is made of the individual identical offset current generation subelement II ' of N (N≤500).Transformer III, its secondary side are provided with N winding, and the number of turn of each winding is W
2, physical dimension is identical.
The operation principle of above-mentioned controlled reactor is:
(1) current sensor 2 is delivered to electric current (i) waveform of electrical network bus 1 in the current detecting link 3,
From current waveform, detect its current signal i
1S
(2) will be from current detecting unit I detected current signal i
1S, be transported to offset current and take place single
Among each offset current generation subelement II ' among the II of unit, each subelement II ' is according to receiving
Current signal i
1S, produce electric current α i
2(α is a penalty coefficient to/N; i
2=-(W
1/ W
2)
i
1), and from motion tracking i
1SOffset current generation subelement II ' can utilize existing
Stream is realized with the technology of combining.
(3) with subelement II
1' the electric current α i that takes place
2/ N delivers to the 1st secondary winding a of transformer
1x
1
In, with subelement II
2' the electric current α i that takes place
2/ N delivers to the 2nd secondary winding a of transformer
2x
2
In; With subelement II
N' the electric current α i that takes place
2/ N delivers to N secondary winding of transformer
In.
Obviously, the size of current that is transported to each secondary winding equates, phase place is identical, but with the current i of primary side electrical network bus
1Antiphase makes primary side in the iron core, secondary side winding magnetomotive force sum:
Fm＝W
1i
1+W
2(αi
2/N+αi
2/N+…+αi
2/N)
The N item
＝(1-α)W
1i
1
When α changed between (0 1), transformer fe is main flux Φ m controllable variations between (Φ mN 0) in the heart, thereby transformer primary side AX port presents impedance Z to electric current
AxControllable variations between (Zm 0).
Fig. 1 is a kind of single-phase controlled reactor, can adopt the single-phase controlled reactor of three covers to constitute three-phase controllable electrical resistor.
Main control unit IV is used for determining and output α value, impedance controllable variations between (0 Zm) that transformer III primary side port is presented electric current.
Above-mentioned controlled reactor can be connected in parallel on the electrical network as shunt reactor, and this moment, main control unit IV was used for the α value of the signal deciding outputs such as voltage, electric current, cos Φ according to electrical network.
This reactor also can be connected between the neutral point and ground of electrical network, is used as from the motion tracking arc suppression coil.At this moment, main control unit IV is used for the α value according to the detected capacitive earth current decision output of other unit.
This reactor also can be connected on the electrical network bus, uses as fault current limiter.When operate as normal, α=1 of main control unit IV output, when fault takes place, output α=0.
When containing big harmonic wave in the transformer primary side current, in order to cut down these harmonic waves, can change the current detecting link 3 among Fig. 3 into the fundamental Current's Detection link, it is output as the fundamental current signal of primary side current.
Fig. 2 is an embodiment, and offset current generation subelement II ' adopts the current tracking technology, specifically comprises four processes: feedback current detects link 7, Current Control link 8, PWM control and drives link 9 and inverter and switching frequency filter 10.Z
LLoad, inverter and switching frequency filter 10 comprise inverter 4 and switching frequency filter Ld Cd.
Current signal i from 3 outputs of current detecting link
1SOutput to the given unit V of current signal, main control unit IV output offset current factor alpha is to the given unit of current signal, and the given unit V of current signal is according to i
1SProduce output current signal α i with two current signals of α
1S/ N; Feedback current detects link 7 received current α i
2The signal of/N produces feedback current signal i
1f, Current Control link 8 is according to α i
1S/ N and i
1fTwo current signal control PWM control and drive link 9, produce driving command and drive inverter 4, close frequency, sine wave output electric current α i through switching frequency filter Ld Cd filtering again
2/ N.
Among Fig. 3, TA
2Be current sensor, belong to feedback current and detect link 7.
Persons skilled in the art can adopt multiple concrete mode that the present invention is realized according to above-mentioned disclosed content.
Claims (2)
1, a kind of jumbo controlled reactor mainly is made up of five unit: current detecting unit (I), offset current generating unit (II), transformer (III), main control unit (IV), the given unit of current signal (V); Current detecting unit (I) comprises the current transformer that is positioned on the transformer primary side bus, and the current detecting link (3) that is connected with the current transformer output, and this unit detects current signal i from the bus current waveform
1SIt is characterized in that:
The current signal i of described current detecting link (3) output
1SOutput to the given unit of current signal (V), main control unit (IV) output offset current factor alpha is to the given unit of current signal (V), and the given unit of current signal (V) is according to i
1SProduce output current signal α i with two current signals of α
1S/ N;
Described offset current generating unit (II) is made of the identical offset current generation subelement of N (II '), N≤500, its input is connected with the output of the given unit of current signal (V), N subelement (II ') all produces equal and opposite in direction, phase place is identical, and with transformer primary side bus on current signal i
1SThe offset current α i of antiphase
2/ N, follow current signal i automatically
1S, wherein α is a penalty coefficient, i
2=-(W
1/ W
2) i
1, W
1Be the number of turn of transformer primary side, W
2The number of turn for the single winding of secondary side;
The secondary side of transformer (III) is provided with N winding, and the number of turn of each winding is identical, and physical dimension equates, and the subelement in each winding and the corresponding offset current generating unit (II) (II ') be connected; One time winding is connected on the electrical network bus, impedance controllable variations between (0 Zm) that transformer (III) presents electric current.
2, jumbo controlled reactor according to claim 1 is characterized in that:: the structure of described compensating fundamental wave electric current generation subelement (II ') is: feedback current detects link (7) received current α i
2The signal of/N produces feedback current signal (i
1f), Current Control link (8) is according to these two current signal α i
1S/ N and i
1fControl PWM control and driving link (9) produce driving command and drive inverter (4), again through switching frequency filter LdCd, and sine wave output electric current α i
2/ N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031281125A CN1295837C (en) | 2003-06-05 | 2003-06-05 | High-capacity controllable reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031281125A CN1295837C (en) | 2003-06-05 | 2003-06-05 | High-capacity controllable reactor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1455486A true CN1455486A (en) | 2003-11-12 |
| CN1295837C CN1295837C (en) | 2007-01-17 |
Family
ID=29260378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031281125A Expired - Fee Related CN1295837C (en) | 2003-06-05 | 2003-06-05 | High-capacity controllable reactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1295837C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100334787C (en) * | 2004-07-31 | 2007-08-29 | 华中科技大学 | Transformer type adjustable reactor and static reactive compensator compose of it |
| CN100347924C (en) * | 2004-07-31 | 2007-11-07 | 华中科技大学 | Large volume static reactive generator |
| CN104535945A (en) * | 2014-12-01 | 2015-04-22 | 国家电网公司 | Magnetic characteristic detecting device for saturated reactor iron core materials |
| CN111431126A (en) * | 2020-05-11 | 2020-07-17 | 广东电网有限责任公司清远供电局 | Online ice melting device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2170938C1 (en) * | 2000-01-25 | 2001-07-20 | Брянцев Александр Михайлович | Method measuring capacitance of network for automatic adjustment of arc control reactors ( versions ) |
| CN1138330C (en) * | 2000-01-27 | 2004-02-11 | 华中理工大学 | Regulatable reactor system based on magnetic flux compensation |
| CN2626109Y (en) * | 2003-06-05 | 2004-07-14 | 华中科技大学 | A large capacity controllable reactor |
-
2003
- 2003-06-05 CN CNB031281125A patent/CN1295837C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100334787C (en) * | 2004-07-31 | 2007-08-29 | 华中科技大学 | Transformer type adjustable reactor and static reactive compensator compose of it |
| CN100347924C (en) * | 2004-07-31 | 2007-11-07 | 华中科技大学 | Large volume static reactive generator |
| CN104535945A (en) * | 2014-12-01 | 2015-04-22 | 国家电网公司 | Magnetic characteristic detecting device for saturated reactor iron core materials |
| CN104535945B (en) * | 2014-12-01 | 2017-10-31 | 国家电网公司 | A kind of magnetic characteristic detection means of saturable reactor core material |
| CN111431126A (en) * | 2020-05-11 | 2020-07-17 | 广东电网有限责任公司清远供电局 | Online ice melting device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1295837C (en) | 2007-01-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN200950540Y (en) | Zero sequence harmonic filtering system | |
| US8058739B2 (en) | Main circuit of electric power generating apparatus for dispersed power supply | |
| CN1855658A (en) | Current sense method for bridgeless boost (BLB) PFC circuit using single current transformer | |
| CN1270438A (en) | Two stage three-phase separating voltage converter | |
| Li et al. | A high-power active filtering system with fundamental magnetic flux compensation | |
| CN1601669A (en) | Inductor arrangement | |
| CN1514791A (en) | Marine propulsion system with reduced on-board network deistortion factor | |
| CN1104002A (en) | Method for controlling resonance power conversion | |
| CN1503423A (en) | Mixing type virtual working compensator | |
| CN1503425A (en) | Mixing type virtual work compensator | |
| CN1295837C (en) | High-capacity controllable reactor | |
| EP4097834A1 (en) | Three phase ac/dc converter consisting of three single phase synchronous cuk converters | |
| CN1909346A (en) | Integrated converting means with three-phase activity coefficient adjustment | |
| CN2626109Y (en) | A large capacity controllable reactor | |
| CN104617580A (en) | Resonant type current limiting system and control method thereof | |
| CN1523755A (en) | Noise filter and plc modulator-demodulator using same | |
| CN1601845A (en) | Large capacity parallel active filter | |
| CN100347924C (en) | Large volume static reactive generator | |
| CN1705180A (en) | Three-core five-post grounding current automatic tracking and compensation system | |
| CN204391749U (en) | Resonant mode current limiting system | |
| CN2739859Y (en) | High-capacity static reaction generator | |
| Adam et al. | Dynamic behaviour of five-level grid connected modular inverters | |
| CN201039028Y (en) | An electronic servo transformer | |
| CN1445900A (en) | High-capacity tandem type active electric power filter | |
| CN1115765C (en) | Three-phase bridge-type rectifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070117 Termination date: 20170605 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |