CN201289970Y

CN201289970Y - Integrated synthesis distribution box for juxtaposition operation of distribution transformer

Info

Publication number: CN201289970Y
Application number: CNU2008201589085U
Authority: CN
Inventors: 唐少波
Original assignee: Jiangxi Pingxiang Power Supply Co Ltd
Current assignee: Jiangxi Pingxiang Power Supply Co Ltd
Priority date: 2008-10-27
Filing date: 2008-10-27
Publication date: 2009-08-12
Anticipated expiration: 2018-10-27

Abstract

The utility model discloses an integrative distribution box for the parallel operation of distribution transformers. The distribution box comprises a box body (14), and GPRS comprehensive testers (1), a current transformer (2), an ammeter (3), capacitance relays (9), thermal relays (10) and capacitors (11), which are mounted in the box body, wherein, the box body is in the shape of a cuboid; two rows of partition boards (16) are transversely mounted in the inner chamber of the box body; supporting plates (15) are mounted in the inner chamber of the box body longitudinally; the box body is divided into six cavities; a GPRS comprehensive tester is arranged on the front surface of the supporting plate in each cavity; incoming line air switches (7) are mounted on the front surfaces of the supporting plates in the cavities at two ends of the box body; a communication air switch (22) is mounted on the front surface of each supporting plate; an outgoing line air switch (23) is mounted on the back surface of each supporting plate; the set of a capacitor switch (8), a capacitance relay (9), a thermal relay (10) and a capacitor (11) which are arranged in sequence from top to bottom is mounted on the back surface of each supporting plate. The distribution box has the advantages that the energy is saved; no load losses are reduced; the reliability and the security of power supply are improved; the running cost of the transformer can also be reduced; and the economic benefit is improved.

Description

The integrated comprehensive distribution box of distribution transformer paired running

Technical field

The utility model relates to the integrated comprehensive distribution box that is used for two station power distribution parallel operation of transformers.

Background technology

Generally, in the power transmission and distribution electrical network of town dweller's household electricity, the capacity of distribution transformer generally is disposable selected by the maximum power consumption total load of resident in the power supply area or production electricity consumption, but because the resident living power utility total amount is altered a great deal by the influence in season.In the winter time, particularly in resident living or to produce power consumption big in summer, its transformer is the oepration at full load state often, or even overload operation, therefore, when transformer in the winter time be in the overload operation state summer, broken string or insulation breakdown etc. just might take place and use electrification in supply line, and power supply reliability, fail safe are not high; In spring and autumn, because the resident living power utility total amount obviously reduces, transformer often is in underload even is in the ultra-low load running status, according to measuring and calculating, in spring and autumn, the average load of most of transformers has only the 20-40% of transformer rated load, and transformer has 6 months at least and is in the running status that is lower than 50% rated load in 1 year.Transformer is except that maintenance and fault stoppage in transit, all be in running status At All Other Times, so long as in running status, transformer is payload, weight no matter, transformer all has loss, except that the variation loss that the variation with payload changes, the fixed loss that not influenced by the transformer load size in addition, and the electrical loss ratio that fixed loss occupies is higher, transformer is when the underrun state, and the relative energy loss is bigger, has increased the operating cost of transformer, the problem that has low load with strong power can not satisfy the needs of transformer economic operation well.

The utility model content

The electricity consumption reliability, fail safe and the economy that exist at transformer in the above-mentioned prior art are not high, the operating cost problem of higher, the utility model provides a kind of two station power distribution transformers that are used for to connect paired running, transformer can be powered when the electricity consumption high load capacity or power supply separately simultaneously, when underload by wherein transformer-supplied, another transformer are stopped transport, can guarantee that Electrical Safety is reliable, reduce the loss of transformer relative fixed, can reduce the integrated comprehensive distribution box of distribution transformer paired running of operating cost again.

The technical scheme that the technical problems to be solved in the utility model is taked is: it (is between the terminal of the primary side of transformer and secondary side same polarity that this distribution transformer paired running comprehensive distribution box is used for two distribution transformer paired runnings that meet the paired running condition, connect respectively by same bus, a winding of transformer is connected in parallel on the bus of same voltage, secondary winding is connected in parallel on the bus of another voltage), described distribution transformer paired running comprehensive distribution box comprises casing and is installed in the interior GPRS comprehensive test instrument of casing, current transformer, ammeter, capacity relay, thermal relay and capacitor, described casing is cuboid, at cabinets cavity two row's dividing plates are housed laterally, at cabinets cavity supporting bracket is housed vertically, casing is divided into six cavitys are arranged, on the two side, front and back of box cavity correspondence, be provided with a body, be provided with wiring hole and air regulator at two ends, the casing left and right sides, on the supporting bracket front in each cavity the GPRS comprehensive test instrument is housed all, on the supporting bracket front of tank ends cavity, the inlet wire air switch is housed all, device contact air switch on the supporting bracket front of casing middle cavity, on the supporting bracket front above the GPRS of casing middle cavity comprehensive test instrument and the contact air switch, ammeter and indicator light are housed, on the supporting bracket front above beginning of inlet wire air and the contact air switch, current transformer are housed all; On the supporting bracket back side in the tank ends cavity outlet air switch is housed respectively, on the supporting bracket back side of casing middle cavity, is equipped with two groups, every group capacitor switch, capacity relay, thermal relay and capacitor are housed respectively from top to bottom successively.

When the utility model was used for parallel operation of transformers, the condition that its transformer should satisfy was:

1, the wiring group of transformer is identical,

2, the no-load voltage ratio of transformer is identical, the rated voltage of transformer identical (allowing ± 0.5 difference),

3, the short-circuit voltage of transformer equates (allowing ± 10 differences),

4, the not super 3:1. of Capacity Ratio of transformer arranged side by side

When wherein the 1st and the 2nd condition guarantee that transformation is unloaded, can not produce circulation in the winding and guarantee that transformer is safe in utilization; The 3rd guarantees that sharing of load is directly proportional with capacity, guarantees that the transformer short-circuit voltage phase difference is little for the 4th.

The utility model will be nearby behind two parallel operation of transformers, in the winter time with the peak hours in summer, two transformers are powered simultaneously, when the spring and autumn underload, a transformer is out of service, power separately by another transformer arranged side by side, but energy savings, reduce no-load loss, reduce idle exciting current, can improve the reliable and secure property of power supply, can reduce transformer economical operation cost again, increase economic efficiency, also can under the normal power supply situation transformer be overhauled and safeguard guaranteeing simultaneously.

Description of drawings

Fig. 1 is the main TV structure schematic diagram that the utility model splits out Men Tihou,

Fig. 2 is the A-A sectional structure schematic diagram of Fig. 1,

Fig. 3 be the B of Fig. 2 to structural representation,

Fig. 4 is the three-dimensional outline drawing of the utility model,

Fig. 5 is the utility model is connected paired running with transformer circuit theory diagrams.

GPRS comprehensive test instrument 2, current transformer 3, ammeter 4, indicator light 5, wiring hole 6, air regulator 7, inlet wire air switch 8, capacitor switch 9, capacity relay 10, thermal relay 11, capacitor 12, stay hook 13, door body 14, casing 15, supporting bracket 16, dividing plate 17, backbone 18,1

# transformer

19,2# transformer 20, load side 21, low-voltage line 22, contact air switch 23, outlet air switch in the drawings, 1,

Embodiment

In Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the integrated comprehensive distribution box of described distribution transformer paired running, it comprises casing 14 and is installed in casing interior GPRS comprehensive test instrument 1, current transformer 2, ammeter 3, capacitor switch 8, capacity relay 9, thermal relay 10 and capacitor 11.As shown in Figure 4, casing is cuboid, is provided with two stay hooks 12 at box top.At cabinets cavity two row's dividing plates 16 are housed laterally, supporting bracket 15 vertically are housed, cabinets cavity is divided into six cavitys are arranged, on the front and back sides of three cavity correspondences of casing both sides, be respectively arranged with three door bodies 13 at cabinets cavity; As depicted in figs. 1 and 2, the tank ends tank wall is provided with wiring hole 5 and air regulator 6, a GPRS comprehensive test instrument 1 all is housed on the supporting bracket front in each cavity, on supporting bracket 15 fronts of tank ends cavity, inlet wire air switch 7 is housed all, contact air switch 22 of device on the supporting bracket front of casing middle cavity, on the supporting bracket front above the GPRS of casing middle cavity comprehensive test instrument and the contact air switch, three ammeters 3 and an indicator light 4 are housed, on the supporting bracket front above contact air switch 22 and the inlet wire air switch 7, three current transformers 2 are housed.As shown in Figure 3, three outlet air switches 23 all are housed on the supporting bracket back side in the tank ends cavity, on supporting bracket 15 back sides of casing middle cavity, are equipped with two groups, every group three capacitor switches 8, three capacity relays 9, three thermal relays 10 and three capacitors 11 are housed respectively from top to bottom successively.

In Fig. 5,1

# transformer

18 and 2# transformer 19 1 ends are connected on the backbone 17, and the other end links to each other with the wiring hole of distribution transformer paired running comprehensive distribution box both sides by low-voltage line 21, and load side 20 is drawn from the distribution box bottom.

Claims

1, the integrated comprehensive distribution box of distribution transformer paired running, it comprises casing (14) and is installed in the interior GPRS comprehensive test instrument (1) of casing, current transformer (2), ammeter (3), capacity relay (9), thermal relay (10)) and capacitor (11), it is characterized in that: described casing is cuboid, at cabinets cavity two row's dividing plates (16) are housed laterally, at cabinets cavity supporting bracket (15) is housed vertically, casing is divided into six cavitys are arranged, on the two side, front and back of box cavity correspondence, be provided with a body (13), be provided with wiring hole (5) and air regulator (6) at two ends, the casing left and right sides, supporting bracket in each cavity (15) all is equipped with the GPRS comprehensive test instrument on the front, inlet wire air switch (7) all is housed on the supporting bracket front of tank ends cavity, device contact air switch (22) on the supporting bracket front of casing middle cavity, on the supporting bracket front above the GPRS of casing middle cavity comprehensive test instrument and the contact air switch, ammeter (3) and indicator light (4) are housed, on the supporting bracket front above inlet wire air switch and the contact air switch, current transformer (2) are housed all; Outlet air switch (23) is housed respectively on the supporting bracket back side in the tank ends cavity, on the supporting bracket back side of casing middle cavity, is equipped with two groups, every group capacitor switch (8), capacity relay (9), thermal relay (10) and capacitor (11) are housed respectively from top to bottom successively.