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Proposal of a single‐phase synchronous inverter with noninterference performance for power system stability enhancement and emergent microgrid operation
Author(s) -
Sekizaki Shinya,
Yorino Naoto,
Sasaki Yutaka,
Matsuo Kosuke,
Nakamura Yuki,
Zoka Yoshifumi,
Shimizu Toshihisa,
Nishizaki Ichiro
Publication year - 2019
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.23200
Subject(s) - synchronizing , microgrid , inverter , controller (irrigation) , testbed , control theory (sociology) , computer science , power (physics) , synchronization (alternating current) , control engineering , engineering , renewable energy , control (management) , voltage , topology (electrical circuits) , electrical engineering , transmission (telecommunications) , agronomy , computer network , physics , quantum mechanics , artificial intelligence , biology , telecommunications
A novel design of a single‐phase synchronous inverter (SSI) having noninterference core dynamic performance is proposed, referred to as noninterference core SSI (NIC‐SSI) in this paper. The proposed inverter consists of “core” and “shell.” This novel design is advantageous for a flexible setting of the core controller to enhance power system stability, which is supported by the shell function for keeping robust synchronizing operation of inverters including microgrid operation. The novel points in this paper are summarized as: (a) the proposed controller enables SSIs to implement directly a desired dynamic characteristic such as a synchronous machine; (b) it can connect any single‐phase systems as well as three‐phase systems; (c) an islanded single‐phase microgrid without rotating machines can be stabilized by multiple SSIs. The proposed controller makes it possible to enhance system stability against increasing uncontrollable renewable energy sources (RESs) and static power conversion devices. The developed SSI realizes flexible use in the demand side operations under normal/faulted grid conditions. Hardware‐in‐the‐loop (HIL) testbed including the proposed digital controller and the real‐time simulator validates the effectiveness of the proposed controller in the experimental conditions.