CN2847488Y

CN2847488Y - Loaded capacity regulating voltage regulating power transformer

Info

Publication number: CN2847488Y
Application number: CN 200520125405
Authority: CN
Inventors: 许长华; 侯世勇; 常立; 张继兰; 白逢君; 宋文华
Original assignee: Shandong Dachi Electric Co Ltd
Current assignee: Shandong Dachi Electric Co Ltd
Priority date: 2005-12-05
Filing date: 2005-12-05
Publication date: 2006-12-13
Anticipated expiration: 2015-12-05

Abstract

The utility model relates to a loaded capacity regulating voltage regulating power transformer, which comprises a transformer casing, a low-voltage winding, a high-voltage winding, and an iron core, wherein the low-voltage winding and the high-voltage winding are arranged in the casing; the high-voltage winding and the low-voltage winding are sheathed on the iron core. The utility model is characterized in that the casing is provided with a loaded capacity regulating switch and the operating controller thereof, a loaded voltage regulating switch and the operating controller thereof; the low-voltage winding is composed of a small wire coil and a big wire coil which are connected in series together; the small wire coil is wound by a conducting wire, and the big wire coil is wound in parallel by two conducting wires; a high-voltage coil tap and a low-voltage coil tap are respectively connected with a loaded capacity regulating switch; the high-voltage winding is composed of at least two sets of coils which are connected in series together; each set of the coils is provided with coil taps respectively; the coil taps as the loaded voltage regulating switch are connected with connected end heads; the iron core is an amorphous alloy iron core. Under the condition of not cutting off running load, the loaded capacity regulating switch changes a connecting mode of high-voltage winding and the low-voltage winding and adjusts capacity, and the loaded voltage regulating switch changes a tap of the high-voltage winding of a transformer and adjusts voltage. The utility model is suitable for occasions with relatively large variations of electric network load and high requirements of voltage quality.

Description

Loaded capacity-regulated pressure regulation power transformer

Affiliated field

The utility model relates to a kind of power transformer, is specially a kind ofly to have two capacitance grades of size, and can carries out the transformer of capacity adjustment, voltage-regulation according to payload under the transformer live state.

Background technology

Present price section, traditional capacitance-adjustable transformer can not charged capacity transfers, have influence on user's power supply reliability, restricted further and promoted the use of; Capacitance-adjustable transformer can not be adjusted the load side change in voltage according to the ruuning situation on-load, makes the step down side voltage fluctuation bigger, has influenced power supply quality.

Summary of the invention

In order to address the above problem, the purpose of this utility model provides a kind of loaded capacity-regulated pressure regulation power transformer.

The technical solution of the utility model is: loaded capacity-regulated pressure regulation power transformer, comprise the transformer housing, be installed in low pressure winding, high pressure winding in the housing, and be nested with the iron core of high and low pressure winding, it is characterized in that: housing is provided with and carries capacity transfer switch and operating control device, on-load voltage regulating switch and operating control device thereof, described low pressure winding is made up of the little wire turn that is cascaded, big wire turn, little wire turn is by a lead coiled, big wire turn is by two leads and around forming, and described high and low pressure coil tap connects loaded capacity-regulated switch respectively; The high pressure winding is made of at least two group coil tandems, and each is organized coil and has separately coil tap, and coil tap connects the termination of inserting as on-load voltage regulating switch; The iron core that described winding was nested with is an amorphous alloy iron core.

The beneficial effects of the utility model are: it can reduce the transformer noload losses of low power consumption phase, and voltage is stable, has improved power supply quality, is applicable to city net, rural power grids, is particularly useful for rural power grids.

Description of drawings

Fig. 1 is an assembling outside drawing of the present utility model;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is the winding coupling schematic diagram when carrying out when loaded capacity-regulated the big capacity of transformer;

Fig. 4 is the winding coupling schematic diagram when carrying out when loaded capacity-regulated the transformer low capacity;

Fig. 5 is the load tap changer wiring schematic diagram when carrying out on-load voltage regulation.

Among the figure; 1. transformer housing, 2. on-load voltage regulating switch, 3. loaded capacity-regulated switch, the operating control device of 4 loaded capacity-regulated switches.

Embodiment

As shown in Figure 1, 2,

This transformer comprises the transformer housing, is installed in low pressure winding, high pressure winding in the housing, and be nested with the iron core of high and low pressure winding, housing is provided with and carries capacity transfer switch and operating control device, on-load voltage regulating switch and operating control device thereof, the iron core that described winding was nested with is an amorphous alloy iron core, this kind iron core no-load loss is little, the energy-saving effect ideal.

Shown in Fig. 3,4, described every phase low pressure winding is made up of the little wire turn that is cascaded, big wire turn, and little wire turn is by a lead I section coiled, and big wire turn is by two lead II, III section and around forming, described high and low pressure coil tap connects loaded capacity-regulated switch respectively; The high pressure winding is made of 9 groups of coil tandems, each is organized coil and has separately coil tap, tap 1, tap 2, tap 3, tap 4, tap 5, tap 6, tap 7, tap 8, tap 9, coil tap connects the termination of inserting as on-load voltage regulating switch tap AK, BK, CK.

The loaded capacity-regulated basic principle of transformer is: transformer three-phase high-voltage winding is connected into triangle (D) when big capacity, be connected into star (Y) during low capacity, and II, the parallel connection of III section are connected with the I section again during big capacity, and I, II, III section are all connected during low capacity; When big capacity was adjusted to low capacity, the low pressure umber of turn increased, and the high pressure winding becomes the Y connection, and phase voltage reduces, and the accelerate multiple that reduces with voltage of the number of turn is suitable, has guaranteed that output voltage is constant; The change of high pressure winding connection way, low pressure winding also, the conversion of series connection and the adjustment of each tap part, finish by loaded capacity-regulated switch.

When big capacity was adjusted to low capacity, because the increase of low pressure umber of turn, magnetic flux density unshakable in one's determination reduced significantly, and the silicon steel sheet specific loss is diminished, and the corresponding reduction of no-load loss and no-load current has reached the purpose of wastage reducing and energy saving.

As shown in Figure 5, the basic principle of transformer on-load voltage regulating is: by operation on-load voltage regulating switch operating control device 3, realize on-load voltage regulating switch tap AK, BK, the switching of CK position, make the transformer high-voltage tapping realize the synchronizing sequence conversion, thereby the voltage ratio that makes transformer changes and changes output voltage, makes it keep stable.

Loaded capacity-regulated switch and operating control device thereof, on-load voltage regulating switch and operating control device thereof are

Prior art.

The same prior art of other technologies.

Claims

1, loaded capacity-regulated pressure regulation power transformer, comprise the transformer housing, be installed in low pressure winding, high pressure winding in the housing, and be nested with the iron core of high and low pressure winding, it is characterized in that: housing is provided with and carries capacity transfer switch and operating control device, on-load voltage regulating switch and operating control device thereof, described low pressure winding is made up of the little wire turn that is cascaded, big wire turn, little wire turn is by a lead coiled, big wire turn is by two leads and around forming, and described high and low pressure coil tap connects loaded capacity-regulated switch respectively; The high pressure winding is made of at least two group coil tandems, and each is organized coil and has separately coil tap, and coil tap connects the termination of inserting as on-load voltage regulating switch; The iron core that described winding was nested with is an amorphous alloy iron core.