Title:
NO-ARC ON-LOAD TAP CHANGER, SWITCHING CONTROL METHOD AND ELECTRICAL EQUIPMENT
Document Type and Number:
WIPO Patent Application WO/2023/169174
Kind Code:
A1
Abstract:
A no-arc on-load tap changer, a switching control method and an electrical equipment, applied to the field of power transmission and transformation of power systems. The no-arc on-load tap changer comprises at least two main switches, two change-over switches and two thyristor auxiliary modules. In the switching process of the main switches, according to a required time sequence, the two thyristor auxiliary modules are connected in parallel with an originally turned-off main switch or a main switch to be turned-off. The main switches and the change-over switches are all rotating shaft type switches. Movable contacts of the main switches and the change-over switches are all provided on a rotating shaft (4). Corresponding static contacts of the main switches and the change-over switches are connected to corresponding transformer taps (1, 2, 3). The movable contacts are communicated with coaxial static contacts when rotating along with the rotating shaft (4). According to a preset time sequence, the corresponding main switches, change-over switches and control switches are controlled to be turned on and off, such that a load current can be transferred, without interrupting, from the originally turned-off main switch to the main switch to be turned-off, and there is no electric arc in the turning-on and turning-off process of each switch.
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Inventors:
LI XIAOMING (CN)
Application Number:
PCT/CN2023/076537
Publication Date:
September 14, 2023
Filing Date:
February 16, 2023
Export Citation:
Assignee:
LI XIAOMING (CN)
International Classes:
H01F29/04; H03K17/081; H03K17/00; H03K17/72
Domestic Patent References:
| WO2002093600A1 | 2002-11-21 |
Foreign References:
| CN108768359A | 2018-11-06 | |||
| CN114783743A | 2022-07-22 | |||
| CN112071672A | 2020-12-11 | |||
| CN112466691A | 2021-03-09 | |||
| DE1438592A1 | 1969-01-16 | |||
| US4201938A | 1980-05-06 |
Attorney, Agent or Firm:
JINAN SHENGDA INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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