CN101404202A - Low-pressure side on-load tap changer - Google Patents
Low-pressure side on-load tap changer Download PDFInfo
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- CN101404202A CN101404202A CNA2008100221051A CN200810022105A CN101404202A CN 101404202 A CN101404202 A CN 101404202A CN A2008100221051 A CNA2008100221051 A CN A2008100221051A CN 200810022105 A CN200810022105 A CN 200810022105A CN 101404202 A CN101404202 A CN 101404202A
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Abstract
The invention provides a low-voltage side on-load tap changer, which is provided with a main transformer consisting of a high voltage coil and a low voltage coil, a voltage regulation coil, a reactance-typed switch, a reactor and a voltage regulation transformer consisting of a parallel coil and a serial coil. A voltage regulation coil is arranged between the low voltage coil of the main transformer and an iron core; the voltage regulation coil is provided with classification sections by two-crosspiece tapping; the voltage regulation coil is provided with 10 shunting taps which are respectively connected with the contacts of the reactance-typed switch; the reactance-typed coil is also connected with the contact of the reactance-typed switch; the parallel coil of the voltage regulation transformer is connected in parallel with the voltage regulation coil of the main transformer; the serial coil of the voltage regulation transformer is connected in series with the low voltage coil of the main transformer. The low-voltage side on-load tap changer has the advantages of reducing the insulation level of the voltage regulation coil of the transformer, reducing the current passing the reactance-typed switch and easily arranging the tapping turns which comply with the voltage precision.
Description
Technical field
The present invention relates to a kind of low-pressure side on-load tap changer, belong to the transformer technology field.
Background technology
In electric power system, we use boosts and step-down transformer is finished the transmission of electric energy between from the power plant to user.Because the input or the excision of user power utilization equipment usually can make line voltage fluctuate, this just exerts an influence to the power consumption equipment that is moving.The method that solves adopts voltage regulating transformer exactly, when fluctuation takes place voltage, the gear of transformer done corresponding change with the voltage that guarantees secondary side stable, thereby eliminate the influence of voltage ripple of power network to the power consumption equipment that moving.In order more promptly to adapt to the variation of electrical network, usually need pressure regulation shelves number with transformer to increase or directly pressure regulation is arranged on low-pressure side with every grade of voltage difference of refinement.When pressure regulation is arranged on low-pressure side,, the electric current that passes through of switch is also improved thereupon because the low-pressure side electric current is big.Simultaneously because the number of turn of low-pressure side is less relatively, the precision of voltage when satisfying pressure regulation, the design of voltage regulation coil is difficulty relatively.Have again and be exactly when the self coupling power transformer is placed on low-pressure side with pressure regulation, because the characteristics of autotransformer, the head end of pressing during voltage regulation coil can only be placed on when adopting constant flux voltage regulation, thereby cause the insulation level in pressure regulation district too high, when selector switch, run into the problem that the switch insulation level is had relatively high expectations.Sometimes the factor of comprehensive above several respects can't be designed satisfactory transformer for the operation of power networks needs at all.
In sum: complex process when adopting the transformer of conventional art to be difficult to solve the direct pressure regulation of low pressure, cost increases and design limitations is big or run into the problem that is difficult to design the feasible design scheme.
Summary of the invention
The objective of the invention is to design a kind of insulation level that can reduce the transformer voltage regulation coil, reduce the electric current by reactance-typed switch and the low-pressure side on-load tap changer of the tap number of turn that satisfies voltage accuracy is set with comparalive ease.This transformer has also solved complex process when realizing the direct pressure regulation of low pressure, cost increases and design limitations is big or run into the problem that is difficult to design the feasible design scheme.
Technical scheme of the present invention is: a kind of low-pressure side on-load tap changer.It is made of the main transformer of being made up of high-tension coil and low-voltage coil, voltage regulation coil, reactance-typed switch, reactor and the voltage regulating transformer be made up of bridging coil and series coil.A voltage regulation coil is set between main transformer low-voltage coil and iron core, and this voltage regulation coil is sleeved on the iron core of main transformer.Voltage regulation coil is provided with the classification section by two retaining taps, and this two retainings classification section is retaining " ten " and the step-down retaining " " that boosts.Voltage regulation coil is provided with 10 shunting taps 12,11 ... 3, these 10 shunting taps are connected with the contact of reactance-typed switch respectively.Four terminations of the P1-P4 of reactor winding also are connected with the contact of reactance-typed switch respectively.The first siding ring of voltage regulating transformer (bridging coil) is connected in parallel with the voltage regulation coil of main transformer.The second siding ring of voltage regulating transformer (series coil) is connected in series with the low-voltage coil of main transformer.
Described reactance-typed switch is selected RMV type reactance-typed switch for use.
Described reactor is selected DKS type small core reactor for use.
Operation principle of the present invention is: be enclosed within because of voltage regulation coil on the iron core of main transformer, main flux can be on voltage regulation coil induced potential, this induced potential carries out excitation by parallel connection to voltage regulating transformer, the secondary side of voltage regulating transformer (series coil) obtains voltage by electromagnetic induction, this Voltage Series is on the main transformer low-voltage coil, the voltage of series coil changes by the change of exciting voltage, thereby plays the purpose that changes low-voltage coil voltage.Voltage regulating transformer provides excitation by the voltage regulation coil of main transformer in addition, change the exciting voltage of voltage regulating transformer by the tap number of turn that changes the main transformer voltage regulation coil, change the voltage of the voltage regulating transformer series coil of connecting, realized the variation of main transformer low-pressure side voltage with the main transformer low-voltage coil.
Because the series coil of voltage regulating transformer is connected with the main transformer low-voltage coil, be main transformer low-pressure side electric current so it passes through.And the voltage regulation coil that is connected with reactance-typed switch constitutes the loop owing to the primary side (bridging coil) with voltage regulating transformer, and what it passed through is the voltage regulating transformer primary side current.So select the no-load voltage ratio of voltage regulating transformer one or two sides can be arranged on electric current on the very little value suitably by reactance-typed switch.By the no-load voltage ratio of voltage regulating transformer suitably is set, strengthened flexibility being provided with on the main transformer voltage regulation coil tap number of turn, avoided being difficult to be provided with the problem of the tap number of turn owing to low voltage voltage is lower.
In addition, if adopting the transformer of low pressure pressure regulation is that (such as the high-pressure side is 220Kv to autotransformer, low-pressure side is 132 ± 16X0.625%Kv), because what be connected with the higher 132kV of voltage insulation level is the series coil of voltage regulating transformer, so the insulation level of series coil and the low pressure of main transformer are that the insulation level of 132kV is identical, and its bridging coil directly is not connected with main transformer, so its insulation level and main transformer do not have causality, this moment, voltage regulating transformer played the effect of similar isolating transformer, and the insulation level of bridging coil can be arranged to very low level.We can notice for the voltage regulation coil that is connected with reactance-typed switch and exactly be connected with the bridging coil of voltage regulating transformer that both bear identical insulation level, so the insulation level of reactance-typed switch just can be arranged to lower value.
Advantage of the present invention is to have designed a kind of insulation level that can reduce the transformer voltage regulation coil, reduce the electric current by reactance-typed switch and the low-pressure side on-load tap changer of the tap number of turn that satisfies voltage accuracy is set with comparalive ease.This transformer has also solved complex process when realizing the direct pressure regulation of low pressure, cost increases and design limitations is big or run into the problem that is difficult to design the feasible design scheme.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is a structural representation of the present invention.
Fig. 2 is an electrical schematic diagram of the present invention.
Among the figure: 1, high-tension coil, 2, low-voltage coil, 3, voltage regulation coil, 4, reactance-typed switch, 5, reactor, 6, bridging coil, 7, series coil, 8, main transformer, 9, iron core, 10, voltage regulating transformer.
Embodiment
As shown in Figure 1 and Figure 2: a kind of low-pressure side on-load tap changer, it is made of the main transformer of being made up of high-tension coil 1 and low-voltage coil 28, voltage regulation coil 3, reactance-typed switch 4, reactor 5 and the voltage regulating transformer 10 be made up of bridging coil 6 and series coil 7.Between main transformer 8 low-voltage coils 2 and iron core 9 voltage regulation coil 3 is set, this voltage regulation coil 3 is sleeved on the iron core 9 of main transformer 8.Voltage regulation coil 3 is provided with the classification section by two retaining taps.This two retainings classification section is retaining " ten " and the step-down retaining " " that boosts.Voltage regulation coil 3 is provided with 10 shunting taps 12,11 ... 3, these 10 shunting taps are connected with the contact of reactance-typed switch 4 respectively.Four terminations of the P1-P4 of reactor 5 coils also are connected with the contact of reactance-typed switch 4 respectively.The primary side bridging coil 6 of voltage regulating transformer 10 is connected in parallel with the voltage regulation coil 3 of main transformer 8.The secondary side series coil 7 of voltage regulating transformer 10 is connected in series with the low-voltage coil 2 of main transformer 8.
Described reactance-typed switch 4 is selected RMV type reactance-typed switch for use.
Described reactor 5 is selected DKS type small core reactor for use.
Voltage regulating transformer provides excitation by the voltage regulation coil of main transformer, change the exciting voltage of voltage regulating transformer by the tap number of turn that changes the main transformer voltage regulation coil, change the voltage of the voltage regulating transformer series coil of connecting, realized the variation of main transformer low-pressure side voltage with the main transformer low-voltage coil.In voltage regulating transformer, the electric current that passes through of series coil both had been main transformer low-pressure side line current, and its insulation level is also identical with main transformer low pressure line end even also slightly higher than it.And the electric current of the bridging coil that is connected with main transformer voltage regulation coil and reactance-typed switch can reduce greatly by the no-load voltage ratio that voltage regulating transformer suitably is set, and its insulation level is also owing to the isolation of voltage regulating transformer reaches a lower level simultaneously.By the no-load voltage ratio of voltage regulating transformer suitably is set, strengthened flexibility being provided with on the main transformer voltage regulation coil tap number of turn, avoid being difficult to be provided with the problem of the tap number of turn owing to low voltage voltage is lower.
Claims (3)
1, a kind of low-pressure side on-load tap changer is characterized in that: it is made of the main transformer of being made up of high-tension coil and low-voltage coil, voltage regulation coil, reactance-typed switch, reactor and the voltage regulating transformer be made up of bridging coil and series coil; A voltage regulation coil is set between main transformer low-voltage coil and iron core, and this voltage regulation coil is sleeved on the iron core of main transformer; Voltage regulation coil is provided with the classification section by two retaining taps, and this two retainings classification section is retaining " ten " and the step-down retaining " " that boosts; Voltage regulation coil is provided with 10 shunting taps 12,11 ... 3, these 10 shunting taps are connected with the contact of reactance-typed switch respectively; Four terminations of the P1-P4 of reactor winding also are connected with the contact of reactance-typed switch respectively; The primary side bridging coil of voltage regulating transformer and the voltage regulation coil of main transformer are connected in parallel; The secondary side series coil of voltage regulating transformer and the low-voltage coil of main transformer are connected in series.
2, a kind of low-pressure side on-load tap changer according to claim 1, reactance-typed switch is selected RMV type reactance-typed switch for use.
3, a kind of low-pressure side on-load tap changer according to claim 1, reactor are selected DKS type small core reactor for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100221051A CN101404202A (en) | 2008-06-24 | 2008-06-24 | Low-pressure side on-load tap changer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100221051A CN101404202A (en) | 2008-06-24 | 2008-06-24 | Low-pressure side on-load tap changer |
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| CN101404202A true CN101404202A (en) | 2009-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008100221051A Pending CN101404202A (en) | 2008-06-24 | 2008-06-24 | Low-pressure side on-load tap changer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360848A (en) * | 2011-05-30 | 2012-02-22 | 江苏华鹏变压器有限公司 | Method for realizing high-insulation and large-current on-load voltage regulation, and regulating transformer |
| CN102360849A (en) * | 2011-07-12 | 2012-02-22 | 三变科技股份有限公司 | Double-high and low voltage on-load regulating transformer |
| CN102945735A (en) * | 2012-11-06 | 2013-02-27 | 保定天威集团有限公司 | Pre-magnetizing transformer with voltage regulator and manufacture method thereof |
| CN103606445A (en) * | 2013-12-04 | 2014-02-26 | 正泰电气股份有限公司 | Method for effectively reducing current passing through on-load tap-changer of transformers |
-
2008
- 2008-06-24 CN CNA2008100221051A patent/CN101404202A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360848A (en) * | 2011-05-30 | 2012-02-22 | 江苏华鹏变压器有限公司 | Method for realizing high-insulation and large-current on-load voltage regulation, and regulating transformer |
| CN102360849A (en) * | 2011-07-12 | 2012-02-22 | 三变科技股份有限公司 | Double-high and low voltage on-load regulating transformer |
| CN102360849B (en) * | 2011-07-12 | 2013-03-13 | 三变科技股份有限公司 | Double-high and low voltage on-load regulating transformer |
| CN102945735A (en) * | 2012-11-06 | 2013-02-27 | 保定天威集团有限公司 | Pre-magnetizing transformer with voltage regulator and manufacture method thereof |
| CN103606445A (en) * | 2013-12-04 | 2014-02-26 | 正泰电气股份有限公司 | Method for effectively reducing current passing through on-load tap-changer of transformers |
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Open date: 20090408 |