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Sag correction and power transfer of double feeder circuit using unified power quality conditioner
Author(s) -
Pai FuSheng,
Tseng PaoShing
Publication year - 2017
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.2225
Subject(s) - voltage sag , voltage , capacitor , power (physics) , engineering , scheme (mathematics) , electronic engineering , maximum power transfer theorem , power quality , power conditioner , upstream (networking) , electric power system , energy (signal processing) , electrical engineering , computer science , ac power , telecommunications , mathematical analysis , statistics , physics , mathematics , quantum mechanics
Summary Alternative energy power generation has emerged as a crucial research topic in studies on modern energy systems. Because of the inherently intermittent generating feature of distributed generation systems, system operations associated with the integration of distributed generation into existing power networks may suffer from voltage variations and power delivery problems. Therefore, this paper proposes a new unified power quality conditioner (UPQC) scheme. The proposed UPQC consists mainly of two back‐to‐back inverters that are connected together by a direct current capacitor and installed in series and in parallel with two adjacent feeders. The UPQC can be operated not only for maintaining a downstream voltage to mitigate upstream voltage sags but also for absorbing real power from one feeder and transferring it to the other feeder. To validate the effectiveness of the proposed scheme, scenarios including voltage sags and power transfer between two feeders were tested through experimental validations. The test results help consolidate the feasibility and practicability of the scheme for potential applications. Copyright © 2016 John Wiley & Sons, Ltd.