Title:
POWER DISTRIBUTION NETWORK GROUNDING FAULT STEP-DOWN ACTIVE ARC EXTINCTION POWER SUPPLY AND CONTROL METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/087434
Kind Code:
A1
Abstract:
The present invention relates to a power distribution network grounding fault step-down active arc extinction power supply and a control method therefor. The active arc extinction power supply comprises a step-up transformer T2, a four-quadrant conversion power module, a series transformer T1, a three-phase alternating-current power supply, an output filter and three phase selection switches, wherein two outgoing line ends of a secondary side of the step-up transformer T2 are respectively connected to a neutral point of a primary side of a grounding transformer Tz in a power distribution network, and the ground; an a-phase output end, a b-phase output end and a c-phase output end of the three-phase alternating-current power supply are respectively connected in series to a phase selection switch and are then connected together to form a contact J; the contact J is connected to one outgoing line end of a primary side of the step-up transformer T2 after passing through a secondary winding of the transformer, and the other outgoing line end of the primary side of the step-up transformer T2 is connected to an n-phase output end of the three-phase alternating-current power supply; the four-quadrant conversion power module comprises a three-phase PWM rectifier, a supporting capacitor C4 and a single-phase inverter; the three-phase PWM rectifier obtains power from the three-phase alternating-current power supply, and a direct-current side of the three-phase PWM rectifier is in bridge connection with the supporting capacitor C4 and is then connected to the single-phase inverter; and an output of the single-phase inverter is loaded to two ends of a primary side of the transformer T1 by means of the output filter.
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Inventors:
SHENG JIANKE (CN)
SHENG LIANGKE (CN)
LIAO XIAOBIN (CN)
LI XIAOFENG (CN)
LUO WANLI (CN)
LIU XIANG (CN)
YANG XINGANG (CN)
SHENG LIANGKE (CN)
LIAO XIAOBIN (CN)
LI XIAOFENG (CN)
LUO WANLI (CN)
LIU XIANG (CN)
YANG XINGANG (CN)
Application Number:
PCT/CN2021/136750
Publication Date:
May 25, 2023
Filing Date:
December 09, 2021
Export Citation:
Assignee:
GUANGDONG FULLDE ELECTRONICS CO LTD (CN)
ZHUZHOU FULLDE RAIL TRANSIT RES INST CO LTD (CN)
HUNAN FULLDE ELECTRICAL CO LTD (CN)
ZHUZHOU FULLDE RAIL TRANSIT RES INST CO LTD (CN)
HUNAN FULLDE ELECTRICAL CO LTD (CN)
International Classes:
H02H9/08; H02M1/12; H02M1/14; H02M5/45; H02M5/458
Domestic Patent References:
| WO2020087811A1 | 2020-05-07 |
Foreign References:
| CN112510669A | 2021-03-16 | |||
| CN104319757A | 2015-01-28 | |||
| CN204858542U | 2015-12-09 | |||
| CN112152194A | 2020-12-29 | |||
| CN107482607A | 2017-12-15 |
Attorney, Agent or Firm:
DONGGUAN CHUANGBO INTELLECTUAL PROPERTY AGENCY OFFICE (CN)
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