CN205828118U - A kind of distribution transformer - Google Patents

Abstract

The utility model discloses a kind of distribution transformer, including main winding and N number of tap-changing windings, each tap-changing windings is provided with M tap；N and M is the positive integer more than 1；The both sides of each tap are connected with on-load voltage regulating switch respectively；First end of on-load voltage regulating switch is connected with corresponding tap；Second end of the on-load voltage regulating switch being positioned at tap-changing windings the same side interconnects, and connects end as the switch on this side of tap-changing windings after connection；The switch of first tap-changing windings the first side connects end and is connected with main winding；The switch of L tap-changing windings the second side connects the switch connection end of end and L+1 tap-changing windings the second side and is connected, and L is odd number, 1≤L≤N；The switch of K tap-changing windings the first side connects the switch connection end of end and K+1 tap-changing windings the first side and is connected, and K is even number, 1≤K≤N.This utility model can be greatly improved adjustable voltage gear number during distribution transformer on-load voltage regulation, meets the demand of distribution transformer.

Description

A kind of distribution transformer

Technical field

This utility model relates to field of power distribution, particularly relates to a kind of distribution transformer.

Background technology

Power distribution network is the important public infrastructure of national economy and social development, in order to improve power supply quality, administers low Voltage problem, it is necessary to strengthen the voltage regulation capability of distribution transformer.Administer from " low-voltage " and Energy Efficiency of Distribution Transformer carries The angle risen is set out, and the on-load voltage regulation of distribution transformer is all the technological means of core.

The on-load voltage regulation mode of distribution transformer is to draw tap by predetermined interval on distribution transformer winding at present, comes Connect on-load voltage regulating switch, but the adjustable voltage gear number of current on-load voltage regulation connected mode is less, it is impossible to enough meet distribution and become The demand of depressor.

Therefore, how providing the distribution transformer that a kind of adjustable voltage gear number is many is that those skilled in the art are presently required solution Problem certainly.

Utility model content

The purpose of this utility model is to provide a kind of distribution transformer, it is possible to when being greatly improved distribution transformer on-load voltage regulation Adjustable voltage gear number, meet the demand of distribution transformer.

For solving above-mentioned technical problem, this utility model provides a kind of distribution transformer, including main winding and N number of pressure regulation Winding, each described tap-changing windings is provided with M tap；N and M is the positive integer more than 1；

The both sides of each described tap are connected with on-load voltage regulating switch respectively；First end of described on-load voltage regulating switch is with corresponding Tap be connected；Second end of the on-load voltage regulating switch being positioned at described tap-changing windings the same side interconnects, and conduct after connection Switch on this side of described tap-changing windings connects end；

The switch of first tap-changing windings the first side connects end and is connected with described main winding；Opening of L tap-changing windings the second side The switch connection end closing connection end and L+1 tap-changing windings the second side is connected, and L is odd number, 1≤L≤N；K tap-changing windings first The switch of side connects the switch connection end of end and K+1 tap-changing windings the first side and is connected, and K is even number, 1≤K≤N.

Preferably, described on-load voltage regulating switch is machinery on-load voltage regulating switch or electron electric power formula on-load voltage regulating switch.

Preferably, described electron electric power formula on-load voltage regulating switch is specially IGCT.

Preferably, each described tap-changing windings being provided with 3 described taps, 3 described taps are respectively arranged at described The two ends of tap-changing windings and center position.

Preferably, each described tap-changing windings includes two voltage regulation coils connected, wherein, the first of the first voltage regulation coil End and the second end of the second voltage regulation coil respectively as the two ends of described tap-changing windings, the second end of described first voltage regulation coil with As the point midway of described tap-changing windings after first end of described second voltage regulation coil is connected.

Preferably, the number of turn of 2N voltage regulation coil in N number of described tap-changing windings is different.

This utility model provides a kind of distribution transformer, and original distribution transformer winding is divided into main winding and N Individual tap-changing windings, each tap-changing windings arranges M tap, M and N is the positive integer more than 1, and the both sides of each tap are respectively Connecting an on-load voltage regulating switch, by said structure, the total voltage that distribution transformer obtains is possible not only to above into main winding Voltage optionally add the voltage of upper part tap-changing windings, it is also possible to optionally deduct part for the voltage above main winding Voltage on tap-changing windings, it is seen then that structure of the present utility model substantially increases adjustable electric during distribution transformer on-load voltage regulation Pressure gear number, it is possible to meet the demand of distribution transformer.

Accompanying drawing explanation

In order to be illustrated more clearly that the technical scheme in this utility model embodiment, below will be to prior art and embodiment The accompanying drawing used required in is briefly described, it should be apparent that, the accompanying drawing in describing below is the most of the present utility model Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to this A little accompanying drawings obtain other accompanying drawing.

The structural representation of a kind of distribution transformer that Fig. 1 provides for this utility model.

Detailed description of the invention

Core of the present utility model is to provide a kind of distribution transformer, it is possible to when being greatly improved distribution transformer on-load voltage regulation Adjustable voltage gear number, meet the demand of distribution transformer.

For making the purpose of this utility model embodiment, technical scheme and advantage clearer, new below in conjunction with this practicality Accompanying drawing in type embodiment, is clearly and completely described the technical scheme in this utility model embodiment, it is clear that retouched The embodiment stated is a part of embodiment of this utility model rather than whole embodiments.Based on the enforcement in this utility model Example, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into The scope of this utility model protection.

This utility model provides a kind of distribution transformer, including main winding and N number of tap-changing windings, on each tap-changing windings It is provided with M tap；N and M is the positive integer more than 1；

The both sides of each tap are connected with on-load voltage regulating switch respectively；First end of on-load voltage regulating switch and corresponding tap phase Even；Second end of the on-load voltage regulating switch being positioned at tap-changing windings the same side interconnects, and as this side of tap-changing windings after connection On switch connect end；

The switch of first tap-changing windings the first side connects end and is connected with main winding；The switch of L tap-changing windings the second side is even Connecing end, is connected end with the switch of L+1 tap-changing windings the second side connected, and L is odd number, 1≤L≤N；K tap-changing windings the first side Switch connects the switch connection end of end and K+1 tap-changing windings the first side and is connected, and K is even number, 1≤K≤N.

Wherein, on-load voltage regulating switch here is machinery on-load voltage regulating switch or electron electric power formula on-load voltage regulating switch.Make For preferably, on-load voltage regulating switch is electron electric power formula on-load voltage regulating switch.It is further known that, electron electric power formula here has load Tap changer is specially IGCT.Certainly, this utility model does not limit the particular type of electron electric power formula on-load voltage regulating switch.

It is understood that for comparing machinery on-load voltage regulating switch, the maintenance of electron electric power formula on-load voltage regulating switch becomes This is relatively low, and owing to not having moveable mechanical part, tap changing will not produce electric arc, therefore safety height and service life are relatively Long；Electron electric power formula on-load voltage regulating switch has signal control simultaneously, and switch speed is fast, and is easily achieved automatic Regulation.

As preferably, each tap-changing windings being provided with 3 taps, 3 taps are respectively arranged at the two of tap-changing windings End and center position.

Wherein, each tap-changing windings includes two voltage regulation coils connected, wherein, the first end of the first voltage regulation coil and Second end of two voltage regulation coils respectively as the two ends of tap-changing windings, the second end of the first voltage regulation coil and the second voltage regulation coil As the point midway of tap-changing windings after first end is connected.

As preferably, the number of turn of 2N voltage regulation coil in N number of tap-changing windings is different.

Shown in Figure 1, the structural representation of a kind of distribution transformer that Fig. 1 provides for this utility model.Wherein, n table Showing the single voltage regulation coil in tap-changing windings, S is electron electric power formula on-load voltage regulating switch, and tap-changing windings number is i (i.e. i=N), Tap number N_TFor 3i, electron electric power formula on-load voltage regulating switch number N_SFor 6i, it is possible to adjustable voltage gear number N of realization_VIt is 7ⁱ。

The voltage that distribution transformer of the present utility model can realize is as follows:

$V=V_N+\left\{\begin{array}{cccccc}-& (V_{n11}+V_{n12})& -& \mathrm{...}& -& (V_{nj1}+V_{nj2})\\ -& V_{n12}& -& \mathrm{...}& -& V_{nj2}\\ -& V_{n11}& -& \mathrm{...}& -& V_{nj1}\\ +& 0& +& \mathrm{...}& +& 0\\ +& V_{n11}& +& \mathrm{...}& +& V_{nj1}\\ +& V_{n12}& +& \mathrm{...}& +& V_{nj2}\\ +& (V_{n11}+V_{n12})& +& \mathrm{...}& +& (V_{nj1}+V_{nj2})\end{array}\right.$

Wherein, V_NFor the voltage on main winding, V_nj1For the voltage on the in jth tap-changing windings the 1st voltage regulation coil, V_nj2For Voltage on 2nd voltage regulation coil of jth tap-changing windings；1≤j≤i.Every string after bracket i.e. represents a corresponding pressure regulation Several situations that winding is likely to occur, such as ,-(V_n11+V_n12) represent S in the first tap-changing windings₁₃And S '₁₁The situation of Guan Bi；+ V_n11Represent S in the first tap-changing windings₁₁And S '₁₂The situation of Guan Bi, by that analogy.

It is understood that in order at guarantee+V_n11And+V_n12In the case of, the voltage that obtains is the most unequal, then select Make the number of turn of two voltage regulation coils in the first tap-changing windings unequal, in like manner, two line pressure regulators in other tap-changing windings The number of turn of circle is the most unequal.Further, for avoid first tap-changing windings access voltage be+V_n11Remaining regulating resistor Access is the situation of 0, and accessing voltage with the second tap-changing windings is+V_n21Remaining regulating resistor access be 0 situation repeat, The number of turn of 2N the voltage regulation coil being then preferably in N number of tap-changing windings is different.This embodiment visible can improve distribution and become The adjustable voltage gear number of depressor, it is to avoid the situation that pressure regulation repeats occurs.

Further, can make every step voltage difference is V_step, i.e. the voltage for jth tap-changing windings is assigned as:

V_nj1=7^j-1V_step；V_nj2=2 × 7^j-1V_step。

This utility model provides a kind of distribution transformer, and original distribution transformer winding is divided into main winding and N Individual tap-changing windings, each tap-changing windings arranges M tap, M and N is the positive integer more than 1, and the both sides of each tap are respectively Connecting an on-load voltage regulating switch, by said structure, the total voltage that distribution transformer obtains is possible not only to above into main winding Voltage optionally add the voltage of upper part tap-changing windings, it is also possible to optionally deduct part for the voltage above main winding Voltage on tap-changing windings, it is seen then that structure of the present utility model substantially increases adjustable electric during distribution transformer on-load voltage regulation Pressure gear number, it is possible to meet the demand of distribution transformer.

It should be noted that in this manual, the relational terms of such as first and second or the like is used merely to one Individual entity or operation separate with another entity or operating space, and not necessarily require or imply these entities or operate it Between exist any this reality relation or order.And, term " includes ", " comprising " or its any other variant are intended to Contain comprising of nonexcludability, so that include that the process of a series of key element, method, article or equipment not only include those Key element, but also include other key elements being not expressly set out, or also include for this process, method, article or set Standby intrinsic key element.In the case of there is no more restriction, statement " including ... " key element limited, it is not excluded that Other identical element is there is also in including the process of described key element, method, article or equipment.

Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses this practicality new Type.Multiple amendment to these embodiments will be apparent from for those skilled in the art, is determined herein The General Principle of justice can realize in the case of without departing from spirit or scope of the present utility model in other embodiments.Cause This, this utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein The widest scope consistent with features of novelty.

Claims (6)

1. a distribution transformer, it is characterised in that include main winding and N number of tap-changing windings, each described tap-changing windings sets It is equipped with M tap；N and M is the positive integer more than 1；

The both sides of each described tap are connected with on-load voltage regulating switch respectively；First end of described on-load voltage regulating switch and corresponding taking out Head is connected；Second end of the on-load voltage regulating switch being positioned at described tap-changing windings the same side interconnects, and as described after connection Switch on this side of tap-changing windings connects end；

The switch of first tap-changing windings the first side connects end and is connected with described main winding；The switch of L tap-changing windings the second side is even Connecing end, is connected end with the switch of L+1 tap-changing windings the second side connected, and L is odd number, 1≤L≤N；K tap-changing windings the first side Switch connects the switch connection end of end and K+1 tap-changing windings the first side and is connected, and K is even number, 1≤K≤N.

Distribution transformer the most according to claim 1, it is characterised in that described on-load voltage regulating switch is machinery on-load voltage regulation Switch or electron electric power formula on-load voltage regulating switch.

Distribution transformer the most according to claim 2, it is characterised in that described electron electric power formula on-load voltage regulating switch is concrete For IGCT.

4. according to the distribution transformer described in Claims 2 or 3, it is characterised in that be provided with 3 on each described tap-changing windings Described tap, 3 described taps are respectively arranged at two ends and the center position of described tap-changing windings.

Distribution transformer the most according to claim 4, it is characterised in that each described tap-changing windings includes that two are connected Voltage regulation coil, wherein, the first end of the first voltage regulation coil and the second end of the second voltage regulation coil are respectively as described tap-changing windings Two ends, the second end of described first voltage regulation coil be connected with the first end of described second voltage regulation coil after as described pressure regulation around The point midway of group.

Distribution transformer the most according to claim 5, it is characterised in that 2N line pressure regulator in N number of described tap-changing windings The number of turn of circle is different.