CN2125211U

CN2125211U - Transformer with automatic volume regulator

Info

Publication number: CN2125211U
Application number: CN 92222230
Authority: CN
Inventors: 赵根田
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-05-20
Filing date: 1992-05-20
Publication date: 1992-12-16

Abstract

The utility model relates to a transformer with automatic capacitance regulator, which is composed of a no excitation capacitance adjustable transformer, a group of auxiliary switches, an operating mechanism, etc. The utility model is characterized in that the inlet wire terminal of the auxiliary switch is connected with a high voltage line, and the outlet wire terminal of the auxiliary switch is connected with the inlet wire terminal of the no excitation capacitance adjustable transformer; when the capacitance is required to be regulated with the variation of a loaded transformer and under the cooperation of a current mutual inductor, a current relay, etc. the auxiliary switch can be switched off by the operating mechanism, which means the no excitation state of a transformer; the transformer can be regulated to an appropriate capacitance by the on-off action of regulating capacitance; the auxiliary switch can be switched on, and the restoration feeding the electricity to the transformer can be realized.

Description

Transformer with automatic volume regulator

The utility model relates to a kind of high-tension transformer that is used for electric power system.

Transformer itself all has electric energy loss.For the certain transformer of capacity, institute's on-load size no matter, its loss is a constant.If but transformer institute on-load also reduces its capacity when being reduced to a certain degree, then its loss will decrease.The present capacity transfer quantitative change depressor of producing (promptly not having excitation capacity transfer quantitative change depressor), because its structural restriction, it is electric next to lean on manpower that transformer is stopped during adjusting, and then regulates with manpower, leans on manpower to recover to send to transformer at last.Though this kind transformer has certain energy-saving effect, but because the variation of general transformer institute on-load size (is to load daytime greatly relatively frequently, night load is little), therefore, relying on manpower to carry out so frequent operation obviously is impossible (can only carry out seasonality regulates).In utility model patent 91206410.2, propose to adopt auxiliary switch and electromagnetic operating mechanism, the auxiliary winding of high and low side is dropped into simultaneously or gets rid of, to regulate the capacity of transformer at any time.Because auxiliary switch that this transformer adopted is amorphous products still at present, has therefore implemented certain difficulty.

The purpose of this utility model is the transformer that a kind of automatic pondage of easy enforcement will be provided, and it can be along with the variation of the payload capacity of adjusting automatically itself.

The purpose of this utility model is achieved in that one group of high pressure auxiliary switch of installing on no excitation capacity transfer quantitative change depressor.The end of incoming cables of auxiliary switch is connected with the mains side high-tension line, leading-out terminal is connected with the end of incoming cables of no excitation capacity transfer quantitative change depressor.Along with the variation transformer of load need adjusting itself capacity the time, under the cooperation of parts such as current transformer and current relay, operating mechanism at first makes auxiliary switch separating brake (making the transformer outage promptly be in no excited state), make the switch motion of capacity transfer amount that transformer is transferred to suitable capacity then, auxiliary switch is closed a floodgate recover to send to transformer.The operating mechanism of auxiliary switch and capacity transfer amount switch can be made one, also can separate.The power of operating mechanism can adopt the mode of spring or hydraulic accumulation energy, also can adopt stand-by power supply.

The utility model be because only need increase by one group of auxiliary switch in the high-pressure side of transformer, again because the cut-out electric current of this auxiliary switch less than the rated current of transformer, promptly structure is simpler, so cost is not high.This is an acceptable for the transformer user.But the more important thing is the further electric energy loss that reduced.

The concrete structure of utility model is provided by following examples and accompanying drawing thereof.

Below in conjunction with the working condition of accompanying drawing detailed description according to the concrete device that the utility model proposes.

Because parts such as no excitation capacity transfer quantitative change depressor that the utility model adopts and high pressure auxiliary switch all belong to existing procucts, therefore implement key of the present utility model and be cooperation between each parts.Again because to reduce the loss of transformer itself particularly important for distribution transformer, so only to have provided a kind of operating mechanism that is suitable for distribution transformer in the accompanying drawing be spring energy-storage formula mechanism.Parts such as this operating mechanism and no excitation capacitance-adjustable transformer and high pressure auxiliary switch are matched, just can realize the purpose of this utility model.

In the accompanying drawings, suppose that transformer (not drawing in the drawings) is just operating in the rated capacity state.When the electric current of institute's on-load is reduced to setting value,, make auxiliary relay action (not drawing among the figure) by current transformer and current relay (not drawing among the figure).Its contact ZJ ₁Closure is with electromagnetic operating mechanism D ₁Power connection, D ₁I.e. action.Its push rod Y ₁Upwards jack-up is with O ₂Be the left end of the lever Aa of fulcrum, the right-hand member of Aa promptly rotates and along clockwise direction with spring T ₁And T ₂Elongation makes it enter the energy storage state.As push rod Y ₁When rising to peak, support Z ₁Just the A end is held, with convenient Y ₁The following backwardness makes Aa still keep position shown in the dotted line in the drawings.Meanwhile, because the effect of connecting rod f makes support Z ₃Turn to position shown in the dotted line among the figure.When lever Aa was about to stop operating, its closure is depressed and made to its right-hand member with auxiliary contact K.Electromagnetic mechanism D ₂Power supply promptly be switched on its push rod Y ₂Make support Z by push rod L ₄Rotate along clockwise direction.At spring T ₂Effect under, power transmission shaft D ₅Connecting lever D on (perpendicular to paper) ₅The d end of d is promptly from support Z ₄On drop to position shown in the dotted line.Thereby drive power transmission shaft D ₅Rotate along clockwise direction that (break-make of auxiliary switch is exactly by power transmission shaft D to drive the auxiliary switch separating brake ₅Drive, do not draw in the drawings) so that the transformer outage.Meanwhile, because spring T ₂Elastic force much larger than spring T ₃, so spring T ₃Be elongated and enter the energy storage state, think that the combined floodgate again of auxiliary switch is ready; In addition, D ₅On connecting lever DO ₅Also turn to support Z ₃The top of the position shown in the with dashed lines is promptly by Z ₃Hold.At connecting lever D ₅When the rotation of d closes to an end (this moment auxiliary switch separating brake), its compressing push rod S makes with O ₄For the lever Gg of fulcrum rotates along clockwise direction.The G end of lever promotes support Z again ₂Rotate along clockwise direction.At spring T ₁Effect under, with O ₃For the b end of the lever Bb of fulcrum promptly from support Z ₂On fall, make lever Bb turn to position shown in the dotted line along clockwise direction.Connecting rod BB ' is promptly along arrow direction, moves thereby promote capacity transfer amount switch (the former switch of being furnished with on no excitation capacity transfer quantitative change depressor, in the drawings not paintings), so that transformer is transferred to than low capacity.When the rotation of lever Bb closes to an end (capacity transfer amount switch moved and finished this moment), its right half part D ₃B compressing connecting rod b makes with O ₁For the lever Mm of fulcrum rotates along clockwise direction.The M end of lever promotes support Z again ₁It is rotated in the counterclockwise direction.Owing to spring T this moment ₁And T ₂Also surplus have certain pulling force, so the A of lever Aa end is promptly from support Z ₁On fall, lever Aa promptly turns to solid line position by dotted line position.When its rotation closes to an end,, make support Z by connecting rod f ₃Turn to solid line position by dotted line position in the counterclockwise direction.At spring T ₃Effect under, connecting lever DO ₅D end from support Z ₃On fall, thereby drive power transmission shaft O ₅Rotate in the counterclockwise direction to drive auxiliary switch and close a floodgate, make transformer return to running status.So far, an adjustment process is all over.

No matter transformer transfers to low capacity by big capacity, still transfers to big capacity by low capacity, and the aforesaid operations working process of mechanism is identical.Because operating mechanism in each course of action, is used to promote the push rod BB ' of capacity transfer amount switch motion all is along arrow direction, therefore between push rod BB ' and capacity transfer amount switch, should install a self-locking push rod again.The self-lock mechanism of the power button switch on its operation principle and the color television set is identical.

Be applicable to no excitation capacity transfer quantitative change depressor of the present utility model (generally all being 6～10KV electric pressure), in Shandong Province and Jiangsu Province manufacturer production arranged all at present.Its operation principle all is when transformer during at no excited state, adopt capacity transfer amount switch (promptly relying on the break-make of several auxiliary contacts), the cross section of the used lead of winding is increased (being that capacity increases) when the number of turn of transformer high and low pressure side winding is reduced; Perhaps the number of turn with transformer high and low pressure side winding increases (being that capacity reduces).Be applicable to auxiliary switch of the present utility model, can adopt the vacuum contactor of identical electric pressure.This contactor is very suitable for frequent movement, and its cost is also corresponding more much lower than general circuit breaker (being switch).In addition, the concrete structure of each several part and the interaction principle between the each several part in the operating mechanism can be referring to the electromagnetic operating mechanisms that is used for high-pressure oilless switch and vacuum contactor.

Claims

A kind of transformer of automatic pondage is characterized in that one group of auxiliary switch of installing on no excitation capacity transfer quantitative change depressor, and the end of incoming cables of auxiliary switch is connected with the mains side high-tension line, leading-out terminal is connected with the end of incoming cables of no excitation capacity transfer quantitative change depressor.