CN101179252A - Method of regulating AC stepless controlled parallel reactor - Google Patents
Method of regulating AC stepless controlled parallel reactor Download PDFInfo
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- CN101179252A CN101179252A CNA2006101048944A CN200610104894A CN101179252A CN 101179252 A CN101179252 A CN 101179252A CN A2006101048944 A CNA2006101048944 A CN A2006101048944A CN 200610104894 A CN200610104894 A CN 200610104894A CN 101179252 A CN101179252 A CN 101179252A
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Abstract
The invention relates to a adjusting method of an AC stepless controllable parallel reactor, which takes a first coil as a main coil connected to network, a secondary coil as a control coil externally connected to a controlled silicon controlling device TK and a third coil as a compensation coil externally connected to a filtering compensation device; an antenna controlling the controlled silicon varies from 90 DEG to 180 DEG or from 180 DEG to 90 DEG, correspondingly, the reactor capacity varies from 0 per cent to 100 per cent of rated capacity steplessly and smoothly; the harmonic current produced during modulating process of a reactor by filtering mode. The invention settles the technical problems of relatively poor stability and electric energy quality of power network in background technology. The invention has flexible and convenient control, fast response, wide adjusting scope and can be widely applied to the ultra high voltage network and specially high voltage network, in particular to long-distance power transmission network.
Description
Technical field
The present invention relates to the control method of reactor that a kind of electric power transmission line uses, be particularly useful for the adjusting of AC stepless controlled parallel reactor.
Background technology
, long distance power transmission high-power in order to realize are constantly built and are developed superhigh pressure, extra-high voltage grid.For this type of long transmission line,, need dispose high-voltage shunt reactor on the line usually in order to limit power frequency and switching overvoltage.
Conventional shunt reactor can not carry out capacity regulating, can not withdraw from.When the circuit transmission power near natural power or when carrying bigger electric power, can cause system voltage to reduce, influence the electricity net safety stable level, limited the circuit conveying capacity.
Summary of the invention
The control method that the purpose of this invention is to provide a kind of AC stepless controlled parallel reactor, it has solved the stability and the relatively poor relatively technical problem of the quality of power supply of electrical network in the background technology.
Design of the present invention is as follows:
A kind of control method of AC stepless controlled parallel reactor, implementation step comprises:
(1) primary winding is the main coil that is connected to the networking, and secondary coil is the control coil of external SCR control device TK, and tertiary coil is the bucking coil of external filtering compensation device;
(2) the controllable silicon trigger angle of SCR control device TK is from 90 °～180 ° or 180 °～90 ° variations, and the reactor capacity is accordingly in the stepless smooth change of 0～100% rated capacity scope;
When (3) the controllable silicon trigger angle was 180 °, the SCR control device was in full cut-off lock state, and the reactor capacity is zero; When the controllable silicon trigger angle was 90 °, the SCR control device was in standard-sized sheet and puts state, and the reactor capacity is 100% rated capacity;
(4) eliminate the harmonic current that produces in the reactor capacity regulating process by the external filtering compensation device of tertiary coil.
The above-mentioned SCR control device TK that joins with secondary coil is the SCR control device of two-way admittance; The filtering compensation device that joins with tertiary coil is to be made of inductance and electric capacity.
Short-circuit impedance between above-mentioned primary winding and the secondary coil is 100%.
The harmonic current content of above-mentioned primary winding is less than 3%.
The present invention has the following advantages:
(1) control in real time, dynamic compensation is carried out flexible AC transmission, the safety of electrical network, good stability, reliability height.
(2) control flexibly, convenient: can control on the spot, also can Long-distance Control; Can manually control, also can control automatically.
(3) response rapidly.The regulating and controlling of arbitrary level capacity all once directly puts in place, is issued to regulate from instruction to finish, and the response time is a Millisecond.
(4) adjustable range is wide.SCR control device two-way admittance, the controllable silicon trigger angle is adjustable from 90 °～180 ° or 180 °～90 °, and the adjustable range of reactor capacity is 0～100%.
(5) be applicable to the reactive power compensation and the adjusting of various electric pressure electrical networks, be specially adapted to superhigh pressure, ultra high voltage long distance power transmission electrical network.
(6) have all functions and the characteristic of common reactor.
(7) loss is lower, and noise is low, vibrates lowly, and harmonic content is less than system's permissible value.
(8) simple in structure, to invest lowlyer, total floor space is less, and the scene of being convenient to the power station is arranged.
Description of drawings
Fig. 1 is the elementary diagram of single phase alternating current (A.C.) stepless controlled parallel reactor of the present invention;
Fig. 2 is the elementary diagram of three-phase alternating current stepless controlled parallel reactor of the present invention.
Embodiment
Referring to Fig. 1, single phase alternating current (A.C.) stepless controlled parallel reactor, primary winding (A-X) circle of serving as theme directly is connected to the networking.Secondary coil (a-x) is a control coil, external SCR control device TK.Tertiary coil (Am-Xm) is a bucking coil, and tertiary coil does not allow direct short-circuit, external filtering compensation device L-C.Short-circuit impedance between primary winding and the secondary coil is 100%.Under rated voltage, common transformer does not allow the secondary coil short circuit, and the present invention's secondary coil when normal operation is in short-circuit state, specifically can realize by short circuit or the disconnection of SCR control device TK.D among Fig. 1 is a circuit breaker.
Referring to Fig. 2, three-phase alternating current stepless controlled parallel reactor, primary winding (A-X, B-Y, the C-Z) circle of serving as theme, three-phase " Y " connects.Primary winding head end A, B, C directly are connected to the networking.After primary winding terminal X, Y, Z connect, through little reactor ground connection of neutral point or direct ground connection.(a-x, b-y, c-z) is control coil with secondary coil, and external SCR control device TK, secondary coil are that single-phase closed connects, terminal directly ground connection.(Am-Xm, Bm-Ym Cm-Zm) are bucking coil, and three-phase " △ " connects, a phase ground connection with tertiary coil.The external filtering compensation device L-C of three-phase.K is an isolating switch, when normal operation, is in the state of explaining that closes.
The present invention realizes that the stepless regulating method of parallel three phase reactor capacity is identical with the control method of parallel single-phase reactor capacity, and control method is as follows:
From the trigger angle of 90 °～180 ° or 180 °～90 ° step-less adjustment SCR control device TK, realize the step-less adjustment of parallel single-phase reactor capacity.
When trigger angle is 180 °, controllable silicon full cut-off lock, secondary coil is an off-state, and the secondary coil electric current is zero, and the reactor capacity is zero.
When trigger angle was 90 °, the controllable silicon standard-sized sheet was put, and was equivalent to the complete conducting of secondary coil, and secondary coil electric current maximum is 100% rated capacity.
When trigger angle when 180 °～90 ° change, the reactor capacity is in 0～100% rated capacity range.
The harmonic current that SCR control device TK of the present invention produces in adjustment process can be eliminated by the external filtering compensation device of tertiary coil, thereby guarantees that primary winding harmonic current content is less than 3%.
Short-circuit impedance between primary winding of the present invention and the secondary coil is 100%.
SCR control device TK of the present invention is the SCR control device of two-way admittance, and filtering compensation device L-C is the filtering compensation device that is made of inductance and electric capacity.
Claims (4)
1. the control method of an AC stepless controlled parallel reactor, implementation step comprises:
(1) primary winding is the main coil that is connected to the networking, and secondary coil is the control coil of external SCR control device TK, and tertiary coil is the bucking coil of external filtering compensation device;
(2) the controllable silicon trigger angle of SCR control device TK is from 90 °～180 ° or 180 °～90 ° variations, and the reactor capacity is accordingly in the stepless smooth change of 0～100% rated capacity scope;
When (3) the controllable silicon trigger angle was 180 °, the SCR control device was in full cut-off lock state, and the reactor capacity is zero; When the controllable silicon trigger angle was 90 °, the SCR control device was in standard-sized sheet and puts state, and the reactor capacity is 100% rated capacity;
(4) eliminate the harmonic current that produces in the reactor capacity regulating process by the external filtering compensation device of tertiary coil.
2. the control method of AC stepless controlled parallel reactor according to claim 1 is characterized in that: the described SCR control device (TK) that joins with secondary coil is the SCR control device of two-way admittance; The described filtering compensation device (L-C) that joins with tertiary coil is the filtering compensation device that is made of inductance and electric capacity.
3. the control method of AC stepless controlled parallel reactor according to claim 1 and 2, it is characterized in that: the short-circuit impedance between described primary winding and the secondary coil is 100%.
4. the control method of AC stepless controlled parallel reactor according to claim 3, it is characterized in that: the harmonic current content of described primary winding is less than 3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101048944A CN101179252A (en) | 2006-11-10 | 2006-11-10 | Method of regulating AC stepless controlled parallel reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101048944A CN101179252A (en) | 2006-11-10 | 2006-11-10 | Method of regulating AC stepless controlled parallel reactor |
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| Publication Number | Publication Date |
|---|---|
| CN101179252A true CN101179252A (en) | 2008-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CNA2006101048944A Pending CN101179252A (en) | 2006-11-10 | 2006-11-10 | Method of regulating AC stepless controlled parallel reactor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712036A (en) * | 2016-10-06 | 2017-05-24 | 聂恒伟 | Adjustable parallel reactor principle and control with excitation adjusting coil and component physical parameter design |
| CN109842334A (en) * | 2019-01-29 | 2019-06-04 | 济南拉斐叶电力科技有限公司 | Voltage-regulating system |
-
2006
- 2006-11-10 CN CNA2006101048944A patent/CN101179252A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712036A (en) * | 2016-10-06 | 2017-05-24 | 聂恒伟 | Adjustable parallel reactor principle and control with excitation adjusting coil and component physical parameter design |
| CN109842334A (en) * | 2019-01-29 | 2019-06-04 | 济南拉斐叶电力科技有限公司 | Voltage-regulating system |
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Open date: 20080514 |