CN101699738A

CN101699738A - 6k/10kV level star-delta transformation dual-purpose transformer

Info

Publication number: CN101699738A
Application number: CN200910252977A
Authority: CN
Inventors: 赵新卫
Original assignee: Xuchang Power Supply Co of Henan Electric Power Co
Current assignee: Xuchang Power Supply Co of Henan Electric Power Co
Priority date: 2009-12-07
Filing date: 2009-12-07
Publication date: 2010-04-28

Abstract

The invention discloses a 6k/10kV level star-delta transformation dual-purpose transformer, comprising a transformer and a tri-phase linked two-way Y-D change-over switch. When the tri-phase linked two-way Y-D change-over switch is turned to a first way, the transformer is a Yyno type transformer applicable to a 6kV grid, and when the tri-phase linked two-way Y-D change-over switch is turned to a second way, the transformer is a Dyn11 type transformer applicable to a 10kV grid, therefore, only one transformer is needed for two grids, thus saving investment on the transformer; a tri-phase linked three-way voltage regulation off circuit tap changer is further adopted, when in a first way, the first segment and second segment of the primary wind of each phase of the transformer are put into use together, thus the output power is maximum; when in a second way, the part between a first joint and a fourth joint, a third joint and a fifth joint of the primary wind of each phase of the transformer are put into use together; and when in a third way, the part between the first joint and the fourth joint of the primary wind of each phase of the transformer is put into use, thus the output power is minimum.

Description

A kind of 6kV/10kV level star angle transformation dual-purpose transformer

Technical field

The present invention relates to the transformer technology field, relate in particular to 6kV, 10kV level star angle transformation dual-purpose transformer that two kinds of grade line voltages of a kind of energy simultaneous adaptation use.

Background technology

The power supply of 10kV line voltage has been adopted in the most of areas of rural power grids, city at present, the Dyn11 type transformer that is used for the 10kV electrical network is shown in Fig. 1 b, but at some collieries, enterprises such as oil still also keep the 6kV power supply grid, the Yyno type transformer that is used for the 6kV electrical network as shown in Figure 1a, therefore, the inconvenience that this has just brought transformer to use to construction enterprises, construction enterprises will possess two kinds of transformers that electric pressure is different, a kind of transformer of 6kV level, the transformer of another kind of 10kV level, this must cause a transformer to use, and another transformer is idle, increase by one times transformer investment to enterprise, also strengthened assembling and disassembling, expense such as installation again.

Summary of the invention

The purpose of this invention is to provide a kind of 6kV/10kV level star angle transformation dual-purpose transformer.

A kind of 6kV/10kV level star angle transformation dual-purpose transformer, the A of transformer, B, the C three-phase primary windings is two-part and A, B, C three-phase primary windings structure is identical, A, B, first section initiating terminal of C three-phase primary windings, the middle part, tail end is provided with first respectively, the 4th, second joint, A, B, second section initiating terminal of C three-phase primary windings, tail end is provided with the 3rd joint respectively, the 5th joint, wherein: this dual-purpose transformer also comprises two grades of Y-D change over switches of three-phase coordinated type, two grades of Y-D change over switches of this three-phase coordinated type comprise the A that structure is identical and be connected, B, C phase switch-dividing, A, B, C phase switch-dividing includes first, second, the 3rd dead point and first, the second moving point, first of each phase, interlock electrical connection respectively between the second moving point; A, the B of two grades of Y-D change over switches of three-phase coordinated type, C phase switch-dividing first dead point interconnect, A phase switch-dividing second dead point of two grades of Y-D change over switches of three-phase coordinated type connects mutually elementary winding the 5th joint of transformer C, B phase switch-dividing second dead point of two grades of Y-D change over switches of three-phase coordinated type connects mutually elementary winding the 5th joint of transformer A, and C phase switch-dividing second dead point of two grades of Y-D change over switches of three-phase coordinated type connects mutually elementary winding the 5th joint of transformer B; A phase switch-dividing the 3rd dead point of two grades of Y-D change over switches of three-phase coordinated type connects mutually elementary winding first joint of transformer A, B phase switch-dividing the 3rd dead point of two grades of Y-D change over switches of three-phase coordinated type connects mutually elementary winding first joint of transformer B, and C phase switch-dividing the 3rd dead point of two grades of Y-D change over switches of three-phase coordinated type connects mutually elementary winding first joint of transformer C; One grade of two grades of Y-D change over switches of three-phase coordinated type is corresponding respectively first, second dead point that connects A, B, C phase switch-dividing of first, second moving point of A, B, C phase switch-dividing, and second gear is corresponding respectively second, third dead point that connects A, B, C phase switch-dividing of first, second moving point of A, B, C phase switch-dividing.

Described 6kV/10kV level star angle transformation dual-purpose transformer, wherein: described dual-purpose transformer also comprises three-phase coordinated type third gear voltage regulation non-excitation tap switch, three-phase coordinated type third gear voltage regulation non-excitation tap switch comprises A, B, the C phase switch-dividing that structure is identical and be connected, A, B, C phase switch-dividing include first, second, third, fourth dead point and first, second moving point, interlock electrical connection respectively between the moving point of first, second of each phase; The 4th of the mutually elementary winding of transformer A, second, the 3rd, corresponding respectively the 3rd of the three-phase coordinated type third gear voltage regulation non-excitation tap switch A phase switch-dividing that connects of the 5th joint, first, second, the 4th dead point, the 4th of the mutually elementary winding of transformer B, second, the 3rd, corresponding respectively the 3rd of the three-phase coordinated type third gear voltage regulation non-excitation tap switch B phase switch-dividing that connects of the 5th joint, first, second, the 4th dead point, the 4th of the mutually elementary winding of transformer C, second, the 3rd, corresponding respectively the 3rd of the three-phase coordinated type third gear voltage regulation non-excitation tap switch C phase switch-dividing that connects of the 5th joint, first, second, the 4th dead point, one grade of three-phase coordinated type third gear voltage regulation non-excitation tap switch is first of each phase switch-dividing, the corresponding respectively connection first of the second moving point, second dead point, second gear is first of each phase switch-dividing, the corresponding respectively connection second of the second moving point, the 3rd dead point, third gear are first of each phase switch-dividing, the corresponding respectively connection the 3rd of the second moving point, the 4th dead point.

The present invention adopts technique scheme will reach following technique effect:

6kV/10kV level star of the present invention angle transformation dual-purpose transformer, two grades of Y-D change over switches of three-phase coordinated type are got to one grade, transformer just becomes Yyno type transformer, be suitable for the 6KV electrical network, two grades of Y-D change over switches of three-phase coordinated type are got to second gear, transformer just becomes Dyn11 type transformer, be suitable for the 10KV electrical network, so, only need a cover transformer, promptly become the Yyno type transformer that is suitable for the 6KV electrical network and become the Dyn11 type transformer that is suitable for the 10KV electrical network again, saved the transformer investment, reduced assembling and disassembling, expense such as installation again; Further, 6kV/10kV level star of the present invention angle transformation dual-purpose transformer adopts three-phase coordinated type third gear voltage regulation non-excitation tap switch, when getting to one grade, each mutually elementary winding of transformer is first, second section comes into operation jointly, exportable maximum power, when getting to second gear, each mutually elementary winding of transformer is between first joint and the 4th joint and the 3rd joint and the 5th joint come into operation, when getting to third gear, each mutually elementary winding of transformer is to come into operation between first joint and the 4th joint, the power output minimum so plays the purpose of regulating power output.

Description of drawings

Fig. 1 a is the existing structure principle chart that is used for the Yyno type transformer of 6kV electrical network;

Fig. 1 b is the existing structure principle chart that is used for the Dyn11 type transformer of 10kV electrical network;

Fig. 2 is the conversion catenation principle figure of 6kV/10kV level star of the present invention angle transformation dual-purpose transformer;

Fig. 3 is the catenation principle figure of the off circuit tap changer of 6kV/10kV level star shown in Figure 2 angle transformation dual-purpose transformer.

Embodiment

A kind of 6kV/10kV level star angle transformation dual-purpose transformer, as shown in Figure 2, the A of transformer, B, C three-phase primary windings are two-part, the A of transformer, B, C three-phase primary windings structure are identical, first section initiating terminal of the mutually elementary winding of A, middle part, tail end are provided with the first joint X1, the 4th joint X4, the second joint X2 respectively, and second section initiating terminal of the mutually elementary winding of A, tail end are provided with the 3rd joint X3, the 5th joint X5 respectively; First section initiating terminal of the mutually elementary winding of B, middle part, tail end are provided with the first joint Y1, the 4th joint Y4, the second joint Y2 respectively, and second section initiating terminal of the mutually elementary winding of B, tail end are provided with the 3rd joint Y3, the 5th joint Y5 respectively; First section initiating terminal of the mutually elementary winding of C, middle part, tail end are provided with the first joint Z1, the 4th joint Z4, the second joint Z2 respectively, and second section initiating terminal of the mutually elementary winding of C, tail end are provided with the 3rd joint Z3, the 5th joint Z5 respectively; Dual-purpose transformer of the present invention also comprises two grades of Y-D change over switches of three-phase coordinated type S1, two grades of Y-D change over switches of this three-phase coordinated type S1 comprises the A that structure is identical and be connected, B, C phase switch-dividing, wherein, A phase switch-dividing comprises first, second, the 3rd dead point CY1, CY2, CY3 and first, the second moving some CYm, CYn, first, the second moving some CYm, interlock is electrically connected between the CYn, B phase switch-dividing comprises first, second, the 3rd dead point BX1, BX2, BX3 and first, the second moving some BXm, BXn, first, the second moving some BXm, interlock is electrically connected between the BXn, C phase switch-dividing comprises first, second, the 3rd dead point AZ1, AZ2, AZ3 and first, the second moving some AZm, AZn, first, the second moving some AZm, interlock is electrically connected between the AZn; A, the B of two grades of Y-D change over switches of three-phase coordinated type S1, the C phase switch-dividing first dead point CY1, BX1, AZ1 interconnect, the A phase switch-dividing second dead point AZ2 of two grades of Y-D change over switches of three-phase coordinated type S1 connects mutually elementary winding the 5th joint Z5 of transformer C, the B phase switch-dividing second dead point BX2 of two grades of Y-D change over switches of three-phase coordinated type S1 connects mutually elementary winding the 5th joint X5 of transformer A, and the C phase switch-dividing second dead point CY2 of two grades of Y-D change over switches of three-phase coordinated type S1 connects mutually elementary winding the 5th joint Y5 of transformer B; A phase switch-dividing the 3rd dead point AZ3 of two grades of Y-D change over switches of three-phase coordinated type S1 connects the mutually elementary winding first joint X1 of transformer A, B phase switch-dividing the 3rd dead point BX3 of two grades of Y-D change over switches of three-phase coordinated type S1 connects the mutually elementary winding first joint Y1 of transformer B, and C phase switch-dividing the 3rd dead point CY3 of two grades of Y-D change over switches of three-phase coordinated type S1 connects the mutually elementary winding first joint Z1 of transformer C; One grade of two grades of Y-D change over switches of three-phase coordinated type S1 is A, B, first of C phase switch-dividing, the corresponding simultaneously respectively A that connects of the second moving point, B, first of C phase switch-dividing, second dead point, as first of C phase switch-dividing, the second moving some CYm, corresponding respectively first of the C phase switch-dividing that connects of CYn, the second dead point CY1, CY2, simultaneously, first of B phase switch-dividing, the second moving some BXm, corresponding respectively first of the B phase switch-dividing that connects of BXn, the second dead point BX1, BX2, and A phase switch-dividing first, the second moving some AZm, corresponding respectively first of the A phase switch-dividing that connects of AZn, the second dead point AZ1, AZ2; The second gear of two grades of Y-D change over switches of three-phase coordinated type S1 is A, B, first of C phase switch-dividing, the corresponding simultaneously respectively A that connects of the second moving point, B, second of C phase switch-dividing, the 3rd dead point, as first of C phase switch-dividing, the second moving some CYm, corresponding respectively second of the C phase switch-dividing that connects of CYn, the 3rd dead point CY2, CY3, simultaneously, first of B phase switch-dividing, the second moving some BXm, corresponding respectively second of the A phase switch-dividing that connects of BXn, the 3rd dead point BX2, BX3, and A phase switch-dividing first, the second moving some AZm, corresponding respectively second of the A phase switch-dividing that connects of AZn, the 3rd dead point AZ2, AZ3.

" Y-D " among two grades of Y-D change over switches of described three-phase coordinated type S1 refers to Yyno type and Dyn11 type, and two grades of Y-D change over switches of three-phase coordinated type S1 changes between these two types of transformers.S1 gets to one grade with two grades of Y-D change over switches of three-phase coordinated type, described dual-purpose transformer just becomes Yyno type transformer, be suitable for the 6KV electrical network, S1 gets to second gear with two grades of Y-D change over switches of three-phase coordinated type, described dual-purpose transformer just becomes Dyn11 type transformer, be suitable for the 10KV electrical network, so, only need a cover transformer equipment, not only become the Yyno type transformer that is suitable for the 6KV electrical network but also become the Dyn11 type transformer that is suitable for the 10KV electrical network, save the transformer investment, reduced assembling and disassembling, expense such as installation again.

The 6kV/10kV level star angle transformation dual-purpose transformer of present embodiment, also comprise three-phase coordinated type third gear voltage regulation non-excitation tap switch S2, see shown in Figure 3, three-phase coordinated type third gear voltage regulation non-excitation tap switch S2 comprises A, B, the C phase switch-dividing that structure is identical and be connected, wherein, A phase switch-dividing comprises first, second, third, fourth dead point AX1, AX2, AX3, AX4 and first, second moving some AXm, AXn, and interlock is electrically connected between first, second moving some AXm, AXn; B phase switch-dividing comprises first, second, third, fourth dead point BY1, BY2, BY3, BY4 and first, second moving some BYm, BYn, and interlock is electrically connected between first, second moving some BYm, BYn; C phase switch-dividing comprises first, second, third, fourth dead point CZ1, CZ2, CZ3, CZ4 and first, second moving some CZm, CZn, and interlock is electrically connected between first, second moving some CZm, CZn; The 4th joint X4 of the mutually elementary winding of transformer A, the second joint X2, the 3rd joint X3, corresponding respectively the 3rd dead point AX3 that connects the A phase switch-dividing of three-phase coordinated type third gear voltage regulation non-excitation tap switch S2 of the 5th joint X5, the first dead point AX1, the second dead point AX2, the 4th dead point AX4, the 4th joint Y4 of the mutually elementary winding of transformer B, the second joint Y2, the 3rd joint Y3, corresponding respectively the 3rd dead point BY3 that connects the B phase switch-dividing of three-phase coordinated type third gear voltage regulation non-excitation tap switch S2 of the 5th joint Y5, the first dead point BY1, the second dead point BY2, the 4th dead point BY4, the 4th joint Z4 of the mutually elementary winding of transformer C, the second joint Z2, the 3rd joint Z3, corresponding respectively the 3rd dead point CZ3 that connects the C phase switch-dividing of three-phase coordinated type third gear voltage regulation non-excitation tap switch S2 of the 5th joint Z5, the first dead point CZ1, the second dead point CZ2, the 4th dead point CZ4, one grade of three-phase coordinated type third gear voltage regulation non-excitation tap switch S2 is first of each phase switch-dividing, the second moving point is corresponding simultaneously respectively to connect first, second dead point, as first of A phase switch-dividing, the second moving some AXm, AXn is corresponding respectively to connect first, the second dead point AX1, AX2, simultaneously, first of B phase switch-dividing, the second moving some BYm, BYn is corresponding respectively to connect first, the second dead point BY1, BY2, and simultaneously C phase switch-dividing first, the second moving some CZm, CZn is corresponding respectively to connect first, the second dead point CZ1, CZ2; The second gear of three-phase coordinated type third gear voltage regulation non-excitation tap switch S2 is corresponding simultaneously respectively second, third dead point that connects of first, second moving point of each phase switch-dividing, corresponding respectively second, third dead point AX2, the AX3 of connecting of first, second moving some AXm, AXn as A phase switch-dividing, simultaneously, the moving point of first, second of B phase switch-dividing BYm, BYn be second, third dead point of correspondence connection BY2, BY3 respectively, and first, second moving some CZm, CZn difference correspondence of C phase switch-dividing connects second, third dead point CZ2, CZ3 simultaneously; The third gear of three-phase coordinated type third gear voltage regulation non-excitation tap switch S2 is corresponding simultaneously respectively the 3rd, the 4th dead point that connects of first, second moving point of each phase switch-dividing, corresponding respectively the 3rd, the 4th dead point AX2, the AX3 of connecting of first, second moving some AXm, AXn as A phase switch-dividing, simultaneously, the moving point of first, second of B phase switch-dividing BYm, BYn be correspondence connection the 3rd, the 4th dead point BY2, BY3 respectively, and first, second moving some CZm, CZn difference correspondence of C phase switch-dividing connects the 3rd, the 4th dead point CZ2, CZ3 simultaneously; When this three-phase coordinated type third gear voltage regulation non-excitation tap switch S2 gets to one grade, first of each mutually elementary winding of transformer, second section comes into operation jointly, as first section contact X1 in the mutually elementary winding of the A of transformer to contact X4, contact X4 comes into operation to the contact X3 of contact X2 and second section to contact X5, simultaneously, first section contact Y1 is to contact Y4 in the mutually elementary winding of the B of transformer, contact Y4 comes into operation to the contact Y3 of contact Y2 and second section to contact Y5, and simultaneously in the mutually elementary winding of C of transformer first section contact Z1 to contact Z4, contact Z4 comes into operation the exportable maximum power of Secondary winding of transformer to the contact Z3 of contact Z2 and second section to contact Z5; When three-phase coordinated type third gear voltage regulation non-excitation tap switch S2 gets to second gear, each mutually elementary winding of transformer is between first joint and the 4th joint and the 3rd joint and the 5th joint come into operation, come into operation to contact X5 as the contact X3 to contact X4 and second section of first section contact X1 in the mutually elementary winding of the A of transformer, simultaneously, first section contact Y1 comes into operation to the contact Y3 of contact Y4 and second section to contact Y5 in the mutually elementary winding of the B of transformer, and simultaneously in the mutually elementary winding of C of transformer first section contact Z1 come into operation to the contact Z3 of contact Z4 and second section to contact Z5; When three-phase coordinated type third gear voltage regulation non-excitation tap switch S2 gets to third gear, come into operation between first joint of each mutually elementary winding of transformer and the 4th joint, as having only first section contact X1 to come into operation to contact X4 in the mutually elementary winding of the A of transformer, simultaneously, have only first section contact Y1 to come into operation to contact Y4 in the mutually elementary winding of the B of transformer, and have only first section contact Z1 to come into operation in the mutually elementary winding of C of while transformer to contact Z4, Secondary winding of transformer power output minimum; So play the purpose of regulating power output.

Claims

1. 6kV/10kV level star angle transformation dual-purpose transformer, the A of transformer, B, the C three-phase primary windings is two-part and A, B, C three-phase primary windings structure is identical, A, B, first section initiating terminal of C three-phase primary windings, the middle part, tail end is provided with first respectively, the 4th, second joint, A, B, second section initiating terminal of C three-phase primary windings, tail end is provided with the 3rd joint respectively, the 5th joint, it is characterized in that: this dual-purpose transformer also comprises two grades of Y-D change over switches of three-phase coordinated type, two grades of Y-D change over switches of this three-phase coordinated type comprise the A that structure is identical and be connected, B, C phase switch-dividing, A, B, C phase switch-dividing includes first, second, the 3rd dead point and first, the second moving point, first of each phase, interlock electrical connection respectively between the second moving point; A, the B of two grades of Y-D change over switches of three-phase coordinated type, C phase switch-dividing first dead point interconnect, A phase switch-dividing second dead point of two grades of Y-D change over switches of three-phase coordinated type connects mutually elementary winding the 5th joint of transformer C, B phase switch-dividing second dead point of two grades of Y-D change over switches of three-phase coordinated type connects mutually elementary winding the 5th joint of transformer A, and C phase switch-dividing second dead point of two grades of Y-D change over switches of three-phase coordinated type connects mutually elementary winding the 5th joint of transformer B; A phase switch-dividing the 3rd dead point of two grades of Y-D change over switches of three-phase coordinated type connects mutually elementary winding first joint of transformer A, B phase switch-dividing the 3rd dead point of two grades of Y-D change over switches of three-phase coordinated type connects mutually elementary winding first joint of transformer B, and C phase switch-dividing the 3rd dead point of two grades of Y-D change over switches of three-phase coordinated type connects mutually elementary winding first joint of transformer C; One grade of two grades of Y-D change over switches of three-phase coordinated type is corresponding respectively first, second dead point that connects A, B, C phase switch-dividing of first, second moving point of A, B, C phase switch-dividing, and second gear is corresponding respectively second, third dead point that connects A, B, C phase switch-dividing of first, second moving point of A, B, C phase switch-dividing.

2. 6kV/10kV level star as claimed in claim 1 angle transformation dual-purpose transformer, it is characterized in that: described dual-purpose transformer also comprises three-phase coordinated type third gear voltage regulation non-excitation tap switch, three-phase coordinated type third gear voltage regulation non-excitation tap switch comprises A, B, the C phase switch-dividing that structure is identical and be connected, A, B, C phase switch-dividing include first, second, third, fourth dead point and first, second moving point, interlock electrical connection respectively between the moving point of first, second of each phase; The 4th of the mutually elementary winding of transformer A, second, the 3rd, corresponding respectively the 3rd of the three-phase coordinated type third gear voltage regulation non-excitation tap switch A phase switch-dividing that connects of the 5th joint, first, second, the 4th dead point, the 4th of the mutually elementary winding of transformer B, second, the 3rd, corresponding respectively the 3rd of the three-phase coordinated type third gear voltage regulation non-excitation tap switch B phase switch-dividing that connects of the 5th joint, first, second, the 4th dead point, the 4th of the mutually elementary winding of transformer C, second, the 3rd, corresponding respectively the 3rd of the three-phase coordinated type third gear voltage regulation non-excitation tap switch C phase switch-dividing that connects of the 5th joint, first, second, the 4th dead point, one grade of three-phase coordinated type third gear voltage regulation non-excitation tap switch is first of each phase switch-dividing, the corresponding respectively connection first of the second moving point, second dead point, second gear is first of each phase switch-dividing, the corresponding respectively connection second of the second moving point, the 3rd dead point, third gear are first of each phase switch-dividing, the corresponding respectively connection the 3rd of the second moving point, the 4th dead point.