CN101039091A - Method and apparatus for realizing load voltage regulation with a plurality of switching elements - Google Patents
Method and apparatus for realizing load voltage regulation with a plurality of switching elements Download PDFInfo
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- CN101039091A CN101039091A CN 200610068943 CN200610068943A CN101039091A CN 101039091 A CN101039091 A CN 101039091A CN 200610068943 CN200610068943 CN 200610068943 CN 200610068943 A CN200610068943 A CN 200610068943A CN 101039091 A CN101039091 A CN 101039091A
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Abstract
Provided is a method and device realizing load voltage regulation by a plurality of switch elements used by the regulating transformer and the reactor, each tap endpoint of the loading regulating transformer or the reactor voltage regulation winding is connected with the switch elements, a thermic element is connected between the tap changer and the switch element; or each tap endpoint of the regulating winding is connected with a current limiting branch composed of switch elements connected serially with the current limiting resistor or other current limiting elements and a direct passing branch composed of switch elements, the current limiting branch is paralleled with the direct passing branch; the switch element or the other end of the parallel circuit connected with the tap endpoint of the same phase voltage regulation winding are paralleled and educed; the device regulates the output voltage by controlling the make and break of different switch elements according to the detection of the voltage detection circuit.
Description
Affiliated technical field
The present invention relates to a kind of transformer, the load tapchanging method and apparatus of reactor, especially replace an on-load tap changer to realize load tapchanging method and apparatus with a plurality of switch elements, and realize load tapchanging method and apparatus with the capacity of reactor on a plurality of switch elements changes alternating current circuit.
Background technology
At present, known on-load tap-changing transformer is realized on-load voltage regulation by the contact that switches on-load tap changer, exist on-load tap changer price height, shunting switch device to need periodic inspection, problem such as will all interrupt otherwise damage easily once maintenance shunting switch device or its damage by the supply of electric power of transformer; Series reactor also can change the voltage of load on the alternating current circuit, when load variations, should make the reactor inductance amount respective change of being connected, so that load voltage keeps stable, connect with the different taps of institute series reactor respectively with the movable end of tap or change over switch and also can realize on-load voltage regulation, existing problem realizes that with shunting switch load tapchanging problem is identical with on-load tap-changing transformer; Application number is 02106678.7 the disclosed battery saving arrangement of patent of invention, and the Japanese peaceful electric automatic Regulation that principle the is identical therewith existing problem of pressure regulation winding of economizing motor and above problem is identical.
Summary of the invention
In order to overcome the deficiency of existing on-load voltage regulation tap or change over switch, the present invention proposes a plurality of switch elements of a kind of usefulness and replaces an on-load voltage regulation tap or change over switch to realize load tapchanging method and apparatus.
The technical solution adopted for the present invention to solve the technical problems is
Economize a main contact that inserts a switch element on each tap end points of pressure regulation winding such as motor in the peaceful electric automatic Regulation of reactor of being connected on on-load tap-changing transformer, the alternating current circuit or Japan, will be connected to all parallel connections and drawing of same another main contact of going up each switch element mutually; Between each tap end points and switch element main contact, insert a thermal protective element; Switch element closure on the tap end points that will insert earlier during pressure regulation disconnects the switch element on the tap end points of former connection again, realizes on-load voltage regulation with this; Switch element on the tap end points of and former connection closed when the switch element on the tap end points that need insert does not disconnect; or because of damaging when having two switch elements closed simultaneously; between two switch elements, will form big partial short-circuit electric current; the thermal protective element of former access action earlier cuts off the partial short-circuit electric current, and the new thermal protective element that inserts has excised no longer action because of the partial short-circuit electric current.Or the current limliting branch road that access is composed in series by switch element and current-limiting resistance on each tap end points of pressure regulation winding, the straight-through branch road of forming by switch element in parallel again on access current limliting branch road, elder generation is with the switch element closure of required access tap end points upper flow branch road when needs switch, again straight-through branch switch element on the former access tap end points is disconnected, again institute is inserted straight-through branch switch element closure on the tap end points, again institute is inserted tap end points upper flow branch switch element and disconnect.
The invention has the beneficial effects as follows
Switch element is selected electromagnetic switch element (as circuit breaker, contactor or relay etc.) for use, or active switch element (as bidirectional thyristor, turn-off thyristor etc.), its responsiveness can realize frequent switching more than the quick action of on-load voltage regulation tap or change over switch; Switch element does not generally need periodic maintenance, and useful life is longer; The price of a plurality of switch elements is far below the price of an on-load tap changer; Can easily realize the phase-splitting pressure regulation; Once a switch element damages, another switch element closure can be able to not interrupted by the supply of electric power of transformer or reactor, and can realize not interrupting supply of electric power its online replacing; If the pressure regulation winding is located at transformer asterism place, pressure regulation place voltage between phases is up to about 15% of circuit rated voltage, and voltage to earth is up to about 8.66% of circuit rated voltage, and select for use and alternate, the insulation against ground ratio of switch element is easier to realize; Because of switch element or be the very fast electromagnetic switch of switching speed, or be the non-contact active switch, electric arc was less or do not have electric arc when switch element switched, and transformer pressure regulation winding can be located at low-pressure side, can further reduce voltage, pressure regulation place voltage between phases and voltage to earth between pressure regulation winding adjacent taps; If also can realize continuous voltage regulating with the active switch element.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is that existing on-load tap-changing transformer or reactor are realized the on-load voltage regulation schematic diagram with on-load tap changer;
Fig. 2 replaces shunting switch to realize on-load voltage regulation the 1st and the 2nd embodiment schematic diagram at of the present invention single-phase on-load tap-changing transformer or reactor are cooperated with temperature-sensitive element with a plurality of electromagnetic switch elements;
Fig. 3 replaces tap or change over switch to realize the 3rd embodiment schematic diagram of on-load voltage regulation at of the present invention single-phase self-coupling on-load voltage-regulating transformer is cooperated with temperature-sensitive element with a plurality of electromagnetic switch elements;
Fig. 4 replaces shunting switch to realize the 4th embodiment schematic diagram of on-load voltage regulation at of the present invention Y-connection three-phase on-load tap-changing transformer is cooperated with temperature-sensitive element with a plurality of electromagnetic switch elements;
Fig. 5 is that diabolo connection three-phase on-load tap-changing transformer of the present invention cooperates the replacement shunting switch to realize the 5th embodiment schematic diagram of on-load voltage regulation with a plurality of electromagnetic switch elements with temperature-sensitive element;
Fig. 6 replaces shunting switch to realize the 6th embodiment schematic diagram of on-load voltage regulation at of the present invention Y-connection three-phase on-load tap-changing transformer is cooperated with temperature-sensitive element with a plurality of active bi-directional thyristors;
Fig. 7 is load or line voltage distribution detection and excitation winding or the control utmost point control circuit block diagram of above each embodiment of the present invention;
Fig. 8 replaces shunting switch to realize the 7th embodiment schematic diagram of on-load voltage regulation at of the present invention Y-connection three-phase on-load tap-changing transformer is cooperated with current-limiting resistance with a plurality of electromagnetic switch elements;
Fig. 9 is that diabolo connection three-phase on-load tap-changing transformer of the present invention cooperates the replacement shunting switch to realize the 8th embodiment schematic diagram of on-load voltage regulation with a plurality of electromagnetic switch elements with current-limiting resistance;
Figure 10 is that load or the line voltage distribution of Fig. 8 of the present invention and Fig. 9 embodiment detects and electromagnetic switch element excitation winding control circuit block diagram.
In Fig. 1,2,4 and 5,0. power circuit end points, 1. the fixing winding of transformer, 2. transformer pressure regulation winding tap, 3. transformer pressure regulation winding, 4. on-load tap changer sliding end, 5. on-load tap changer fixed terminals, 6. power circuit end points, 7. electromagnetic switch element main contact, 8. temperature-sensitive element.
In Fig. 6,0. power circuit end points, 1. fixedly winding, 2. transformer pressure regulation winding tap, 3. transformer pressure regulation winding, 6. power circuit end points, 7. active bi-directional thyristor, 8. temperature-sensitive element of transformer.
In Fig. 3,0. autotransformer input, the 1. fixing winding of autotransformer, 2. autotransformer pressure regulation winding tap, 3. autotransformer pressure regulation winding, 6. asterism earth terminal, 7. electromagnetic switch element main contact, 8. temperature-sensitive element, 9. autotransformer output.
In Fig. 7,1. circuit or load voltage testing circuit, 2. electromagnetic switch element excitation winding or active switch element control utmost point control circuit, 3. the electromagnetic switch element excitation winding control end points or the active switch element control utmost point.
In Fig. 8 and Fig. 9,0. power circuit end points, 1. the fixing winding of transformer, the 2. straight-through branch switch element of transformer pressure regulation winding, the 3. straight-through branch road exit of transformer pressure regulation winding, 4. transformer pressure regulation winding current limliting branch switch element, 5. transformer pressure regulation winding current limliting branch road exit, 6. Y-connection asterism earth terminal, 7. transformer pressure regulation winding exit, 8. transformer pressure regulation winding, 9. transformer pressure regulation winding exit current-limiting resistance.
In Figure 10,1. circuit or load voltage testing circuit, 2. electromagnetic switch element excitation winding control circuit, 3. current limliting branch road electromagnetic switch element excitation winding control end; 4. straight-through branch road electromagnetic switch element excitation winding control end.
Embodiment
In Fig. 2 embodiment, go up the main contact that inserts an electromagnetic switch element (7) at single-phase transformer or each tap of reactor pressure regulation winding (2), another main contact of each switch element (7) is all in parallel and draw, become another end points (6), the capacity of switch element (7) main contact should be greater than the line current rated value; End points (0) and (6) can be two end points of transformer input winding, also can be two end points of transformer output winding; Insert a temperature-sensitive element (8) between each switch element main contact (7) and pressure regulation winding tap (2), temperature-sensitive element (8) can be thermistor, thermal relay, self-healing fuse etc.; Former connection switch element does not disconnect when need access switch element is closed; or because of damaging when having two switch elements closed simultaneously; between two switch elements, form the partial short-circuit electric current; flow through from former access thermal protective element because of new access switch element inserts before existing electric current, former access thermal protective element will elder generation's action cut-out partial short-circuit electric current.
In Fig. 3 embodiment, go up a main contact that inserts an electromagnetic switch element (7) in each tap of single-phase autotransformer pressure regulation winding (2), the whole parallel connections of another main contact of each switch element (7) are drawn as output (9), the capacity of switch element (7) main contact should be greater than the load current rated value, end points (6) ground connection; Identical among other parts and Fig. 2 embodiment.
In Fig. 4 embodiment, go up a main contact that inserts an electromagnetic switch element (7) in three-phase Y-connection transformer every phase pressure regulation each tap of winding (2), the whole parallel connections of another main contact that are connected to the switch element (7) in each tap of same phase pressure regulation winding are drawn, become another end points (6), three end points (6) are formed asterism and ground connection, and the capacity of switch element (7) main contact should be greater than the line current rated value; End points (0) can be two end points that transformer one is imported winding mutually with (6), also can be two end points of transformer output winding one phase, other with Fig. 2 embodiment in identical.
In Fig. 5 embodiment, connect transformer every phase pressure regulation each tap of winding (2) at the three-phase triangle and go up a main contact that inserts an electromagnetic switch element (7), the whole parallel connections of another main contact that are connected to the switch element (7) in each tap of same phase pressure regulation winding are drawn, become another end points (6), each end points (6) connects with end points (0) on the adjacent pressure regulation winding, form triangle and connect, other with Fig. 2 and Fig. 4 embodiment in identical.
In Fig. 6 embodiment, go up a main electrode that inserts an active bi-directional thyristor (7) in three-phase Y-connection transformer every phase pressure regulation each tap of winding (2), the whole parallel connections of another main electrode that are connected to the active switch element (7) in each tap of same phase pressure regulation winding are drawn, become another end points (6), three end points (6) are formed asterism, the capacity of active switch element (7) main electrode should be greater than the line current rated value, other with Fig. 2 and Fig. 4 embodiment in identical.
Fig. 7 is the common detection control section of above each embodiment.After voltage detecting circuit (1) detected load or line voltage distribution and departs from set point, switch element control circuit (2) adjusted, and will insert excitation winding (3) N of electromagnetic switch element earlier
jEnergising, or make the control utmost point (3) N that need have access to the source switch element
jBecome high voltage, cut off switch element (3) N of former connection again
iAll switch element, temperature-sensitive element, voltage detecting and excitation winding control circuit all can place a switch cubicle on transformer next door.
In Fig. 8 embodiment, go up the current limliting branch road that access is composed in series by a current-limiting resistance (9) and a switch element (4) at three-phase Y-connection transformer every phase pressure regulation winding exit (7), it is fixed that the resistance of current-limiting resistance (9) can be got with reference to the current-limiting resistance resistance in the existing on-load tap changer; The straight-through branch road of forming by a switch element (2) in parallel again on described current limliting branch road, an end points after each pressure regulation winding exit upper flow branch road and the straight-through branch road parallel connection is drawn, and go up the aft terminal parallel connection in parallel of whole current limliting branch roads and straight-through branch road mutually with every, become end points (6), three end points (6) are formed asterism, the capacity of switch element (4) and (2) main contact should be greater than the line current rated value, end points (0) can be two end points that transformer one is imported winding mutually with (6), also can be two end points that transformer one is exported winding mutually; When need switch, to need newly to insert switch element (4) closure on the pressure regulation winding exit current limliting branch road earlier, again the switch element (2) on the straight-through branch road of former access pressure regulation winding exit is disconnected, to newly insert switch element (2) closure on the straight-through branch road of pressure regulation winding exit again, the switch element (4) that will newly insert again on the straight-through branch road of pressure regulation winding exit disconnects.Between switch element (2) on the straight-through branch road of new access pressure regulation winding exit and the switch element (4) on the straight-through branch road of former access pressure regulation winding exit interlocked relationship need be arranged, switch element (4) on the straight-through branch road of former access pressure regulation winding exit does not disconnect, and the switch element (2) that newly inserts on the straight-through branch road of pressure regulation winding exit can not be closed.
In Fig. 9 embodiment, connect transformer every phase pressure regulation winding exit (7) at the three-phase triangle and go up current limliting branch road that is composed in series by a current-limiting resistance (9) and a switch element (4) of access, it is fixed that the resistance of current-limiting resistance (9) can be got with reference to the current-limiting resistance resistance in the existing on-load tap changer; The straight-through branch road of forming by a switch element (2) in parallel again on described current limliting branch road, an end points after each pressure regulation winding exit upper flow branch road and the straight-through branch road parallel connection is drawn, and go up the aft terminal parallel connection in parallel of whole current limliting branch roads and straight-through branch road mutually with every, become end points (6), the end points (0) of the adjacent pressure regulation winding with transformer of each end points (6) is connected, form triangle and connect, other with Fig. 8 embodiment in identical.
Figure 10 is the common detection control section of above Fig. 8 and Fig. 9 embodiment.After voltage detecting circuit (1) detected load or line voltage distribution and departs from set point, electromagnetic switch element excitation winding control circuit (2) adjusted, earlier with required access pressure regulation winding exit current limliting branch switch element (2) M
jClosure is cut off straight-through branch switch element (4) M of former connection pressure regulation winding exit again
i, confirm that former connection pressure regulation winding exit leads directly to branch switch element (4) M
iAfter cut, will newly insert straight-through branch switch element (2) M of pressure regulation winding exit again
jClosure, all switch element, current-limiting resistance, voltage detecting and excitation winding control circuit all can place a switch cubicle on transformer next door.
Claims (7)
1. on-load tap-changing transformer, reactor is realized load tapchanging method and apparatus with a plurality of switch elements, it is characterized in that: the end points of on-load tap-changing transformer or each tap of on-load voltage regulation reactor pressure regulation winding is inserted the electromagnetic switch element respectively (comprise circuit breaker, contactor, relay etc.) main contact, or the active switch element (comprises the single-direction and dual-direction thyristor, turn-off thyristor, IGBT etc.) main electrode, between each tap end points of described pressure regulation winding and switch element main contact or main electrode, insert temperature-sensitive element, described another main contact of switch element or the main electrode parallel connection that is connected on each tap exit of homophase pressure regulation winding drawn; Or on each tap exit of pressure regulation winding, insert the current limliting branch road that is composed in series by current-limiting resistance or other current limiting element and switch element, with the straight-through branch road of forming by switch element, with current limliting branch road on the same tap exit of access pressure regulation winding and straight-through branch road parallel connection, described another end points parallel connection that is connected to parallel circuits on each tap exit of homophase pressure regulation winding is drawn; Adjust output voltage with the break-make that is connected to switch element main contact on the different tap end points of pressure regulation winding or main electrode, the break-make of each switch element main contact or main electrode is according to the detection of voltage detecting circuit to load or line voltage distribution, and control electromagnetic switch element excitation winding current switching or active switch element control electrode voltage are just realized.
2. a kind of on-load tap-changing transformer according to claim 1, reactor are realized load tapchanging method and apparatus with a plurality of switch elements; it is characterized in that: cooperate pressure regulation method and the device of forming with switch element and temperature-sensitive element for described; temperature-sensitive element is PTC element, self-healing fuse, self-resetting type fuse, bimetal plate heat protector etc., and their connection in series-parallel combination.
3. a kind of on-load tap-changing transformer according to claim 1, reactor is realized load tapchanging method and apparatus with a plurality of switch elements, it is characterized in that: for described pressure regulation method and the device that composes in parallel with current limliting branch road and straight-through branch road, after the switch element closure of new access pressure regulation tapping exit upper flow branch road, the switch element of straight-through branch road disconnects again on the former access pressure regulation tapping exit, the switch element of straight-through branch road is closed again on the new access pressure regulation tapping exit, and the switch element that newly inserts pressure regulation tapping exit upper flow branch road disconnects again; Lead directly to the switch element of branch road on the former access pressure regulation tapping exit and newly insert between the switch element that leads directly to branch road on the pressure regulation tapping exit interlocked relationship is arranged.
4. according to claim 1,2,3 described a kind of on-load tap-changing transformers, reactor is realized load tapchanging method and apparatus with a plurality of switch elements, it is characterized in that: described three-phase on-load tap-changing transformer, three main contacts or three pairs of main electrodes on the three-phase on-load voltage regulation reactor pressure regulation winding exit same position adopt same three-phase or heterogeneous switch element (to comprise three-phase or multi-phase circuit breaker, three-phase or heterogeneous contact device, three-phase or heterogeneous relay, three-phase or heterogeneous active switch element) three main contacts or three pairs of main electrodes, three main contacts on the three-phase on-load voltage regulation winding exit same position or the three pairs of main electrodes be break-makes simultaneously.
5. realize load tapchanging method and apparatus according to claim 1,2,3 described a kind of on-load tap-changing transformers, reactor with a plurality of switch elements, it is characterized in that: in described on-load tap-changing transformer, the on-load voltage regulation reactor pressure regulation winding every mutually in each main contact or the every pair of main electrode adopt a main contact of a switch element respectively, or a pair of main electrode of an active switch element, every mutually in each main contact or every pair of main electrode can distinguish break-make.
6. realize load tapchanging method and apparatus according to claim 1,2,3,4,5 described a kind of on-load tap-changing transformers, reactor with a plurality of switch elements, it is characterized in that: described on-load tap-changing transformer is economized motor, autotransformer, tortuous connection three-phase equilibrium reactor or its combination for the peaceful electric automatic Regulation of Japan.
7. realize load tapchanging method and apparatus according to claim 1,2,3,4,5,6 described a kind of on-load tap-changing transformers, reactor with a plurality of switch elements, it is characterized in that: the pressure regulation winding of described on-load tap-changing transformer is located at its low-pressure side.
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| CN 200610068943 CN101039091A (en) | 2006-09-25 | 2006-09-25 | Method and apparatus for realizing load voltage regulation with a plurality of switching elements |
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| CN 200610068943 CN101039091A (en) | 2006-09-25 | 2006-09-25 | Method and apparatus for realizing load voltage regulation with a plurality of switching elements |
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| CN102075007A (en) * | 2011-01-19 | 2011-05-25 | 西安盟创电器有限公司 | Switching switch device |
| CN102075006A (en) * | 2011-01-19 | 2011-05-25 | 西安盟创电器有限公司 | Village supercharger |
| CN102290215A (en) * | 2011-03-31 | 2011-12-21 | 上海磁浮交通发展有限公司 | Transformer for output of high-voltage high-power converter |
| CN102356443A (en) * | 2009-04-09 | 2012-02-15 | 赖茵豪森机械制造公司 | On-load tap changer comprising semiconductor switching elements |
| CN102419387A (en) * | 2011-12-13 | 2012-04-18 | 河南省电力公司平顶山供电公司 | Rapidly-adjustable three-phase load electricity meter box |
| CN103001227A (en) * | 2011-09-16 | 2013-03-27 | 深圳市海威特节能科技有限公司 | Phase-shift type electromagnetism-balancing, voltage-regulating and power-saving device |
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| CN102356443A (en) * | 2009-04-09 | 2012-02-15 | 赖茵豪森机械制造公司 | On-load tap changer comprising semiconductor switching elements |
| CN102356443B (en) * | 2009-04-09 | 2014-05-14 | 赖茵豪森机械制造公司 | On-load tap changer comprising semiconductor switching elements |
| CN102075007B (en) * | 2011-01-19 | 2013-06-12 | 西安盟创电器有限公司 | Switching switch device |
| CN102075006A (en) * | 2011-01-19 | 2011-05-25 | 西安盟创电器有限公司 | Village supercharger |
| CN102075007A (en) * | 2011-01-19 | 2011-05-25 | 西安盟创电器有限公司 | Switching switch device |
| CN102290215A (en) * | 2011-03-31 | 2011-12-21 | 上海磁浮交通发展有限公司 | Transformer for output of high-voltage high-power converter |
| CN102290215B (en) * | 2011-03-31 | 2014-08-20 | 上海磁浮交通发展有限公司 | Transformer for output of high-voltage high-power converter |
| CN103001227A (en) * | 2011-09-16 | 2013-03-27 | 深圳市海威特节能科技有限公司 | Phase-shift type electromagnetism-balancing, voltage-regulating and power-saving device |
| CN102419387A (en) * | 2011-12-13 | 2012-04-18 | 河南省电力公司平顶山供电公司 | Rapidly-adjustable three-phase load electricity meter box |
| US10147562B2 (en) | 2014-11-25 | 2018-12-04 | Hai Wang | On-load voltage regulation tap switch for transformer and switch control method |
| CN105632727B (en) * | 2014-11-25 | 2021-01-12 | 王海 | Transformer on-load voltage regulation tap switch and on-load voltage regulation transformer |
| CN105632727A (en) * | 2014-11-25 | 2016-06-01 | 王海 | On-load tap-changer of transformer and on-load tap changing transformer |
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| CN104699151A (en) * | 2015-03-27 | 2015-06-10 | 国家电网公司 | Voltage regulator, voltage regulating system and voltage regulating method |
| CN105006978A (en) * | 2015-08-26 | 2015-10-28 | 南方电网科学研究院有限责任公司 | Load voltage regulation device of distribution transformer |
| CN105319465A (en) * | 2015-10-21 | 2016-02-10 | 清华大学 | Power grid voltage fault simulation device |
| CN110088707A (en) * | 2016-10-27 | 2019-08-02 | Abb瑞士股份有限公司 | The power electronic tapchanging device module of for transformer |
| CN106740152A (en) * | 2016-11-06 | 2017-05-31 | 华北电力大学 | A kind of electric automobile uses the vehicle-mounted integrated form charge-discharge circuit of shunting tap |
| CN106876120A (en) * | 2017-04-18 | 2017-06-20 | 江西明正变电设备有限公司 | A kind of adjustable dry-type transformer |
| CN106876120B (en) * | 2017-04-18 | 2019-04-12 | 江西明正变电设备有限公司 | A kind of adjustable dry-type transformer |
| CN111315522A (en) * | 2017-07-28 | 2020-06-19 | 伊利诺斯工具制品有限公司 | Method and apparatus for providing welding power |
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