CN102136346A - Saturable reactor main body - Google Patents
Saturable reactor main body Download PDFInfo
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- CN102136346A CN102136346A CN 201110020730 CN201110020730A CN102136346A CN 102136346 A CN102136346 A CN 102136346A CN 201110020730 CN201110020730 CN 201110020730 CN 201110020730 A CN201110020730 A CN 201110020730A CN 102136346 A CN102136346 A CN 102136346A
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Abstract
The invention discloses a saturable reactor main body, relating to the technical field of power transmission and distribution in power systems. The saturable reactor body comprises a saturable reactor core with a structure shaped like a Chinese character ri, wherein at least two direct current coils are respectively arranged at the two sides of the saturable reactor core symmetrically; at least an alternating current reactor coil is installed in the middle of the saturable reactor core; the two ends of an alternating current reactor serve as the external alternating current reactance coil input terminal and output terminal of the saturable reactor core; the direct current coils arranged in the symmetrical positions at the two sides of the saturable reactor core are correspondingly connected in such a manner that the dotted terminals and the non-dotted terminals are self connected; and after the dotted terminals of two symmetrical direct current coils are connected, the non-dotted terminals of the two symmetrical direct current coils, as the external direct current coil input terminal and output terminal of the saturable reactor core, are no longer connected. The saturable reactor body is applied as a shunt reactor and has the advantages of equal magnetic resistance met with positive and negative half waves of the alternating current, better output waveform, few alternating current coils, small core volume and lighter weight.
Description
Technical field
The present invention relates to electric power system and send the power transformation technical field, particularly a kind of saturable reactor main body.
Background technology
Along with the continuous development of electric power system, more and more higher to the safe operation of power system requirement, the requirement of the quality of power supply is also more and more higher.But series reactor limiting short-circuit current; But shunt reactor over-voltage; Reactor and electric capacity associating can constitute filter circuit; Reactor is very widely in the application of electric power system.In a part of application, the reactance value of reactor can be fixed; In many applications, need reactance value to change along with the change of power system operation mode.The research and the application of the controlled reactor that can regulate continuously of reactance value in recent years becomes heat subject.Controllable transducer is a kind of important way of controlled reactor.
Controllable transducer is to utilize the saturation characteristic of saturable reactor iron core to change the reactance value of reactor.There have been many controllable transducers to be suggested, patent of invention number is: 2006100476121 " self-feeding controllable transductor ", patent of invention number is: " a kind of rapid-response controllable reactor of self-energy-taking " of 200810011902X, patent of invention number is: 2011100048327 " a kind of self-excitation type controllable transducer and control method thereof " proposed three kinds of controllable transducers.Chinese Water Conservancy water power publishing house published Cai Xuansan in 2008, and Gao Yuenong work " controllable transducer principle, a design and application " book has also been done summary to controllable transducer.The various controllable transducers that propose differ from one another, and still, the magnetic resistance that the positive and negative half-wave of the alternating current of these controllable transducer main bodys runs into is unequal, and output waveform is relatively poor, and core volume is big, and weight is big.
Patent of invention number is: the saturable reactor that 2010105840411 " a kind of saturable reactor " explained provides a kind of and is satisfying the volume and the weight that can reduce saturable reactor under the performance requirement condition; Under the magnetic saturation state, can reduce a kind of saturable reactor of the reactance value of saturable reactor.This is a kind of saturable reactor that satisfies the demand limiter requirement and invent, and promptly saturable reactor is series at the transmitting loop application; When saturable reactor was used as shunt reactor, under the magnetic saturation state, the reactance value of saturable reactor was too low harmful on the contrary.When saturable reactor is used as shunt reactor, alternating voltage, electric current output waveform there is higher requirement.
Summary of the invention
Purpose of the present invention when saturable reactor is used as shunt reactor, provides a kind of alternating current magnetic resistance that positive and negative half-wave runs into to equate exactly for addressing the above problem, better output waveform is arranged, AC coil is few, and core volume is little, the saturable reactor main body that weight is lighter.
For achieving the above object, the present invention adopts following structure:
A kind of saturable reactor main body, it comprises: a saturable reactor iron core; The saturable reactor iron core is a day font structure; At least two dc coils are installed in saturable reactor iron core both sides symmetry respectively; At least one AC reactor coil is installed in the centre of saturable reactor iron core again; Wherein, the two ends of AC reactor are as saturable reactor main body external interchange reactance coil input end and lead-out terminal; Described each dc coil in saturable reactor iron core bilateral symmetry position connects from the mode correspondence that links to each other with end of the same name, different name end respectively; After wherein the end of the same name of the dc coil of two symmetries linked to each other, their different name end no longer linked to each other with lead-out terminal as the external dc coil input terminal of saturable reactor main body.
Described saturable reactor iron core day font structure is an axle with middle iron core center line, bilateral symmetry; Middle iron core forms the magnetic flux closed loop with a side iron core wherein, and middle iron core and opposite side iron core form another magnetic flux closed loop; The both sides iron core forms the 3rd magnetic flux closed loop; The sectional area of both sides iron core equates; The sectional area of middle iron core equals the sectional area sum of both sides iron core.
The dc coil structure of each symmetric position of described saturable reactor iron core both sides is identical with the number of turn.
Described interchange reactance coil input end and lead-out terminal add rated operational voltage, and under the dc coil electric current equalled zero condition, iron core was unsaturated.The invention provides a kind of saturable reactor of using in parallel, have the magnetic resistance that the positive and negative half-wave of alternating current runs into and equate that better output waveform is arranged, and AC coil is few, core volume is little, the advantage that weight is lighter.
The invention has the beneficial effects as follows: dc coil has under the direct current situation, although the iron core both sides have nothing in common with each other to the magnetic resistance of alternating current positive half wave or negative half-wave, the iron core both sides are identical to the comprehensive magnetic resistance of alternating current positive half wave or negative half-wave; The waveform of alternating current positive half wave is identical with the waveform of negative half-wave; Having under the condition of better output waveform, saturable reactor main body AC coil is few, and core volume is little, and weight is lighter.
Description of drawings
Fig. 1 represents saturable reactor agent structure and connected mode;
Wherein, 1. ac terminal I, 2. ac terminal II, 3. dc terminal I, 4. dc terminal II, 5. saturable reactor iron core.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing and embodiment.
Saturable reactor agent structure and connected mode are as shown in Figure 1.Device ac terminal I1 and ac terminal II2 connect AC electric power systems; Device dc terminal I3 and dc terminal II4 polyphone insert DC control circuit.
The end of the same name of reactance coil L1 is the ac terminal I1 of saturable reactor ac circuit, magnetic flux φ 1 direction that the alternating current that reactance coil L1 flows into produces in the middle iron core of saturable reactor day font structure upwards, respectively through day font structure both sides iron core formation closed loop, the magnetic flux of both sides iron cores circulation equates, is half of φ 1.The middle core section of saturable reactor day font structure is long-pending bigger, and under the identical exciting current condition, the volume and the reactance coil of saturable reactor are less.
If the dc coil L2 of saturable reactor, dc coil L3 direct current are zero; The saturable reactor iron core breaks away from saturation condition, and the reactance that is connected on the reactance coil L1 in the transmitting loop is very big, is the excitation impedance of saturable reactor.
The end of the same name of dc coil L2 is connected with the end of the same name of dc coil L3, and the different name end of dc coil L2 is one of them dc terminal I3 of saturable reactor DC loop, and the different name end of dc coil L3 is the dc terminal II4 of saturable reactor DC loop.Reactance coil L1 produces the power frequency magnetic flux in the saturable reactor iron core, this power frequency magnetic flux produces induced electromotive force in dc coil L2 and dc coil L3; Because dc coil L2 is identical with the technological requirement of dc coil L3 structure, the number of turn, the power frequency induced electromotive force of dc coil L2 is kept to zero mutually with the power frequency induced electromotive force of dc coil L3, and the alternating current of reactance coil L1 does not exert an influence to DC loop.
The end of the same name of dc coil L4 is connected with the end of the same name of dc coil L5, and the different name end of dc coil L4 is connected with the different name end of dc coil L5.Reactance coil L1 produces the power frequency magnetic flux in the saturable reactor iron core, this power frequency magnetic flux produces induced electromotive force in dc coil L4 and dc coil L5; Because dc coil L4 is identical with the technological requirement of dc coil L5 structure, the number of turn, the power frequency induced electromotive force of dc coil L4 is kept to zero mutually with the power frequency induced electromotive force of dc coil L5, does not have electric current to flow among dc coil L4 and the dc coil L5.
When flowing through direct current among dc coil L2 and the L3, a day font structure both sides iron core forms the direct current flux closed loop; Direct current flux can not flow into the middle iron core of saturable reactor day font structure.When flowing through direct current among dc coil L2 and the L3 when big, direct current flux makes the place core sataration, and exchange flux is unsaturated at middle iron core, and still, exchange flux all is in saturation condition in other paths of iron core, and the reactance of reactance coil L1 reduces.
When in regulating dc coil L2 and L3, flowing through direct current big or small, direct current flux makes place core sataration degree change with the size of direct current, the saturation condition of the iron core of these distances of exchange flux changes with the size of direct current, and the reactance value of reactance coil L1 changes continuously with the size of direct current.
Alternating current produces magnetic flux φ 1 in the middle iron core of saturable reactor day font structure.φ 1 a positive half wave magnetic flux part flows through the iron core at dc coil L2 place, remainder flows through the iron core at dc coil L3 place, if the direction of φ 1 positive half wave is identical with the direction of the magnetic flux φ 2 that dc coil L2 produces in iron core, the flow direction of φ 1 positive half wave remainder is opposite with the direction of the magnetic flux φ 3 that dc coil L3 produces in iron core; The magnetic resistance of φ 1 in dc coil L2 iron core is big, and the magnetic resistance in dc coil L3 iron core is little.The situation of φ 1 negative half-wave magnetic flux is just in time opposite, and the magnetic resistance of φ 1 in dc coil L2 iron core is little, and the magnetic resistance in dc coil L3 iron core is big.The iron core symmetry of the iron core of dc coil L2 and dc coil L3, so, dc coil has under the direct current situation, although the iron core both sides have nothing in common with each other to the magnetic resistance of alternating current positive half wave or negative half-wave, the iron core both sides are identical to the comprehensive magnetic resistance of alternating current positive half wave or negative half-wave; The waveform of alternating current positive half wave is identical with the waveform of negative half-wave.
Because alternating current produces magnetic flux φ 1 in the middle iron core of saturable reactor day font structure, have in dc coil L2 and L3 under the direct current condition, magnetic flux φ 1 can on average not flow into the both sides iron core respectively; This will cause the induced electromotive force that produces among dc coil L2 and the dc coil L3 unequal, and the alternating current of reactance coil L1 will exert an influence to DC loop.For reducing this adverse effect, increase dc coil L4 and dc coil L5; Dc coil L2 and the induced electromotive force among the dc coil L3 that alternating current causes are unequal, equally also cause the induced electromotive force among dc coil L4 and the dc coil L5 unequal pro rata, unequal will the making among dc coil L4 and the dc coil L5 of induced electromotive force among dc coil L4 and the dc coil L5 produces circulation, and this circulation can reduce induced electromotive force unequal among dc coil L2 and the dc coil L3; Reduce the influence of alternating current to DC control circuit.High order harmonic component induced electromotive force among dc coil L4 and the dc coil L5 will make among dc coil L4 and the dc coil L5 and produce circulation, reduce the higher harmonic components of alternating current among the reactance coil L1, make the more approaching sine wave of waveform of alternating current.
Each parts of described a kind of saturable reactor agent structure and connected mode can manufacture and design with prior art, can realize fully.Broad prospect of application is arranged.
Claims (4)
1. a saturable reactor main body is characterized in that it comprises: a saturable reactor iron core; The saturable reactor iron core is a day font structure; At least two dc coils are installed in saturable reactor iron core both sides symmetry respectively; At least one AC reactor coil is installed in the centre of saturable reactor iron core again; Wherein, the two ends of AC reactor are as saturable reactor main body external interchange reactance coil input end and lead-out terminal; Described each dc coil in saturable reactor iron core bilateral symmetry position connects from the mode correspondence that links to each other with end of the same name, different name end respectively; After wherein the end of the same name of the dc coil of two symmetries linked to each other, their different name end no longer linked to each other with lead-out terminal as the external dc coil input terminal of saturable reactor main body.
2. a kind of saturable reactor main body as claimed in claim 1 is characterized in that, described saturable reactor iron core day font structure is an axle with middle iron core center line, bilateral symmetry; Middle iron core forms the magnetic flux closed loop with a side iron core wherein, and middle iron core and opposite side iron core form another magnetic flux closed loop; The both sides iron core forms the 3rd magnetic flux closed loop; The sectional area of both sides iron core equates; The sectional area of middle iron core equals the sectional area sum of both sides iron core.
3. a kind of saturable reactor main body as claimed in claim 1 is characterized in that, the dc coil structure of each symmetric position of described saturable reactor iron core both sides is identical with the number of turn.
4. a kind of saturable reactor main body as claimed in claim 1 is characterized in that, described interchange reactance coil input end and lead-out terminal add rated operational voltage, and under the dc coil electric current equalled zero condition, iron core was unsaturated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110020730 CN102136346A (en) | 2011-01-19 | 2011-01-19 | Saturable reactor main body |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110020730 CN102136346A (en) | 2011-01-19 | 2011-01-19 | Saturable reactor main body |
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| CN102136346A true CN102136346A (en) | 2011-07-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103871716A (en) * | 2014-02-18 | 2014-06-18 | 同济大学 | Integrated magnetic structure |
| CN104201903A (en) * | 2014-09-11 | 2014-12-10 | 山东大学 | Multifunctional transformer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85103560A (en) * | 1985-05-03 | 1985-10-10 | 青田县电器技术研究所 | The three-phase saturation electric reactor of a kind of heptastyle laminated type (or laminated type) singlecore |
| CN85203415U (en) * | 1985-08-09 | 1987-04-22 | 彭志平 | Adjustable inductive resisfance reactor |
| CN1039928A (en) * | 1989-05-30 | 1990-02-21 | 陈春平 | A kind of three-phase saturation electric reactor of double-iron core |
| CN2273072Y (en) * | 1996-07-25 | 1998-01-21 | 魏书庆 | Electro-control earthing arc extinguishing arrangement |
| JP2003070012A (en) * | 2001-08-24 | 2003-03-07 | Mitsubishi Electric Corp | Saturable reactor |
-
2011
- 2011-01-19 CN CN 201110020730 patent/CN102136346A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85103560A (en) * | 1985-05-03 | 1985-10-10 | 青田县电器技术研究所 | The three-phase saturation electric reactor of a kind of heptastyle laminated type (or laminated type) singlecore |
| CN85203415U (en) * | 1985-08-09 | 1987-04-22 | 彭志平 | Adjustable inductive resisfance reactor |
| CN1039928A (en) * | 1989-05-30 | 1990-02-21 | 陈春平 | A kind of three-phase saturation electric reactor of double-iron core |
| CN2273072Y (en) * | 1996-07-25 | 1998-01-21 | 魏书庆 | Electro-control earthing arc extinguishing arrangement |
| JP2003070012A (en) * | 2001-08-24 | 2003-03-07 | Mitsubishi Electric Corp | Saturable reactor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103871716A (en) * | 2014-02-18 | 2014-06-18 | 同济大学 | Integrated magnetic structure |
| CN104201903A (en) * | 2014-09-11 | 2014-12-10 | 山东大学 | Multifunctional transformer |
| CN104201903B (en) * | 2014-09-11 | 2016-08-31 | 山东大学 | A kind of Multifunction transformer |
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Application publication date: 20110727 |