CN201233803Y

CN201233803Y - Special reactor having functions of transformer and reactor concurrently

Info

Publication number: CN201233803Y
Application number: CNU2008200773512U
Authority: CN
Inventors: 李文平; 赵峰; 宋秀生; 王长连
Original assignee: Baoding Tianwei Group Co Ltd
Current assignee: Baoding Tianwei Group Co Ltd
Priority date: 2008-05-28
Filing date: 2008-05-28
Publication date: 2009-05-06
Anticipated expiration: 2018-05-28

Abstract

The utility model relates to a special reactor with the functions of a transformer and a reactor, and is applicable to an on-load voltage regulation power transformer for a reactive on-load tapping switch. The special reactor is of a three-phase structure; each phase is provided with two concentric coils (LS1 and LS2); the iron core of each coil is a three-column air gap type iron core; and the two concentric type coils (LS1 and LS2) are sleeved on each column of the iron core. The utility model has the advantages that when being used for matching the reactive on-load tapping switch, the special reactor can achieve the function that the reactive on-load tapping switch works in the bridging and non-bridging state, that is, when the special reactor works in the non-bridging state, the tapping voltage bridged is equivalent to that of working in the state of the reactor, and the operating current passed is equivalent to that of working in the state of an autotransformer.

Description

The special reactor that has transformer and reactor function simultaneously

Technical field

The utility model relates to a kind of special reactor that has transformer and reactor function simultaneously, is applicable to the on-load voltage regulation power transformer that adopts the reactance on load tap changer.

Background technology

In the on-load voltage regulation power transformer that adopts the reactance on load tap changer, not to adopt traditional resistance-type on load tap changer, but adopt a kind of reactance on load tap changer, and this switch need dispose a kind of special reactor that has transformer and reactor function simultaneously, this reactor is connected between vacuum switch and the tap selector, when switch is operated in non-bridge status, this reactor is equivalent to be operated in the reactor state to the tapping voltage of institute's cross-over connection, be equivalent to be operated in the autotransformer state for the operating current that is passed through, the function needs that conventional reactor and transformer all can not satisfy this switch need to adopt the special reactor that has transformer and reactor function simultaneously.

Summary of the invention

Technical problem to be solved in the utility model is at above-mentioned the deficiencies in the prior art, and a kind of special reactor that has transformer and reactor function when satisfying reactance on load tap changer need of work is provided.

The technical scheme that its technical problem that solves the utility model adopts:

Reactor described in the utility model is a three-phase structure, and every have two concentric coil (L mutually _S1, L _S2), its iron core is three post GAP TYPE iron cores; On each post of described iron core, be with two described concentric coil (L _S1, L _S2);

Determining of the air gap of described three post GAP TYPE iron cores: the leakage reactance pressure drop of the rated voltage-coil of the pressure drop=coil of air gap unshakable in one's determination, calculate gas length unshakable in one's determination according to the pressure drop of air gap unshakable in one's determination again, the total length of air gap unshakable in one's determination is divided into small air gap unshakable in one's determination more than 2, and the length of each small air gap unshakable in one's determination is 10mm ± 2mm;

The voltage of the single coil of reactor described in the utility model is half of maximum voltage between two tapping steps of bridge joint; Electric current is half of transformer operating current at non-bridge status in the described reactor single coil, i.e. 1/2I _L, when bridge status, I _C＜1/2I _L

The beneficial effects of the utility model are that this reactor is when being used for match reactance formula on load tap changer, the reactance on load tap changer be can finish and bridge joint and non-bridge status function are operated in, be that this special reactor is when being operated under the non-bridge status, tapping voltage to institute's cross-over connection is equivalent to be operated in the reactor state, is equivalent to be operated in the autotransformer state for the operating current that is passed through.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

When Fig. 2 is the utility model and the use of on load tap changer coupling, the schematic diagram of non-bridge status.

When Fig. 3 is the utility model and the use of on load tap changer coupling, the schematic diagram of bridge status.

Line graph when Fig. 4 is the utility model and the use of on load tap changer coupling.

In Fig. 1-4,1, three post GAP TYPE iron cores, 2, small air gap unshakable in one's determination, 3, with the matching used high pressure on-load tap-changing transformer of this reactor, 4, the tap selector of three-phase reactance on load tap changer, 5, the vacuum circuit-breaker of three-phase reactance on load tap changer, 6, the by-pass switch of three-phase reactance on load tap changer, L _S1, L _S2Be respectively the every concentric coil that has mutually of this reactor (P wherein ₁, P ₂Be L _S1Two end points, P ₃, P ₄Be L _S2Two end points), L _g, described high pressure on-load tap-changing transformer high-tension coil (wherein H1, H2, H3 are power end), L _d, described high pressure on-load tap-changing transformer low-voltage coil (wherein X1, X2, X3 are load end), L _t, described high pressure on-load tap-changing transformer voltage regulation coil, K, on load tap changer, are crossover position at M, R, change over switch, XO, neutral point.

Embodiment

Embodiment (referring to Fig. 1-4, wherein Fig. 2-4 is the application example of present embodiment):

By the described embodiment of Fig. 1 as can be known, described reactor is a three-phase structure, and every have two concentric coil (L mutually _S1, L _S2), its iron core is three post GAP TYPE iron cores 1; On each post of described iron core, be with two described concentric coil (L _S1, L _S2);

Determining of the air gap of described three post GAP TYPE iron cores 1: the leakage reactance pressure drop of the rated voltage-coil of the pressure drop=coil of air gap unshakable in one's determination, follow again according to the pressure drop of air gap unshakable in one's determination and calculate gas length unshakable in one's determination, the total length of air gap unshakable in one's determination is divided into small air gap unshakable in one's determination 2 more than 2, and the length of each small air gap 2 unshakable in one's determination is 10mm ± 2mm;

The voltage of the single coil of described reactor is half of maximum voltage between two tapping steps of bridge joint; Electric current is half of transformer operating current at non-bridge status in the described reactor single coil, i.e. 1/2I _L, when bridge status, I _C＜1/2I _L

Claims

1, the special reactor that has transformer and reactor function simultaneously is characterized in that described reactor is a three-phase structure, and every have two concentric coil (L mutually _S1, L _S2), its iron core is three post GAP TYPE iron cores (1); On each post of described iron core, be with two described concentric coil (L _S1, L _S2);

Determining of the air gap of described three post GAP TYPE iron cores (1): the leakage reactance pressure drop of the rated voltage-coil of the pressure drop=coil of air gap unshakable in one's determination, calculate gas length unshakable in one's determination according to the pressure drop of air gap unshakable in one's determination again, the total length of air gap unshakable in one's determination is divided into small air gap unshakable in one's determination (2) more than 2, and the length of each small air gap unshakable in one's determination (2) is 10mm ± 2mm;

2, the special reactor that has transformer and reactor function simultaneously according to claim 1, the voltage that it is characterized in that the single coil of described reactor are half of maximum voltage between two tapping steps of bridge joint; Electric current is half of transformer operating current at non-bridge status in the described reactor single coil, i.e. 1/2I _L, when bridge status, I _C＜1/2I _L