Title:
UNBALANCED CURRENT REGULATION SYSTEM AND METHOD FOR CAPACITY INCREASING AND SPLIT-PHASE OUTPUT OF DISTRIBUTION TRANSFORMER
Document Type and Number:
WIPO Patent Application WO/2024/001202
Kind Code:
A1
Abstract:
Disclosed in embodiments of the present invention are an unbalanced current regulation system and method for capacity increasing and split-phase output of a distribution transformer. The unbalanced current regulation system for capacity increasing and split-phase output of a distribution transformer is provided with a single-phase transformer, a single-phase bridge rectifier, and a three-phase full-bridge inverter; a high-voltage side of the single-phase transformer is connected to a high-voltage side of the distribution transformer; the single-phase bridge rectifier connected to a low-voltage side of the single-phase transformer converts alternating current from the single-phase transformer into direct current and supplies the direct current to the three-phase full-bridge inverter; and the three-phase full-bridge inverter is connected to a three-phase line by means of a three-phase reactor. A three-phase negative-sequence current and a three-phase zero-sequence current are obtained by performing sequence component decomposition processing on a three-phase load current, then a three-phase reference current is calculated on the basis of a capacitor voltage control component, and then hysteresis control is performed on the three-phase reference current, such that the three-phase full-bridge inverter outputs a corresponding three-phase compensation current to each phase of the three-phase line, thereby achieving three-phase unbalanced current regulation.
Inventors:
YANG JINDONG (CN)
LIU HONGWEN (CN)
QIAN GUOCHAO (CN)
RONG FEI (CN)
TANG LIJUN (CN)
ZHAI SHAOLEI (CN)
HUANG JISHENG (CN)
LIU HONGWEN (CN)
QIAN GUOCHAO (CN)
RONG FEI (CN)
TANG LIJUN (CN)
ZHAI SHAOLEI (CN)
HUANG JISHENG (CN)
Application Number:
PCT/CN2023/075845
Publication Date:
January 04, 2024
Filing Date:
February 14, 2023
Export Citation:
Assignee:
ELECTRIC POWER RES INSTITUTE OF YUNNAN POWER GRID CO LTD (CN)
International Classes:
H02J3/26; H02M5/458
Foreign References:
| CN115036945A | 2022-09-09 | |||
| CN106972505A | 2017-07-21 | |||
| CN216672609U | 2022-06-03 | |||
| US5883796A | 1999-03-16 |
Other References:
JIA GANG; CHEN JIE; WANG SINAN; WU LIMIN; WU GANG: "Three Phase Load Imbalance in Low Voltage Distribution Network", RURAL ELECTRIFICATION, no. 12, 10 December 2019 (2019-12-10), pages 65 - 69, XP009552424, ISSN: 1003-0867, DOI: 10.13882/j.cnki.ncdqh.2019.12.024
Attorney, Agent or Firm:
SHENZHEN CIPRUN INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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