Development of Single-Phase Synchronous Inverter for Single-Phase Microgrid

Author:

Yorino Naoto12ORCID,Zoka Yoshifumi2,Sasaki Yutaka2ORCID,Sekizaki Shinya2ORCID,Yokonuma Mitsuo3,Himuro Takahiro3,Kuroki Futoshi3,Fujii Toshinori3,Inoue Hirotaka3

Affiliation:

1. National Institute of Technology (KOSEN), Kure College, Kure 737-8506, Japan

2. Graduate School of Advanced Science and Engineering, Hiroshima University, Higashihiroshima 739-8527, Japan

3. Department of Electrical Engineering and Information Science, National Institute of Technology (KOSEN), Kure College, Kure 737-8506, Japan

Abstract

The work is based on a collaboration between Hiroshima University and Kure KOSEN College. This paper presents the design concept, hardware, and applications of a single-phase synchronous inverter (SSI), a specially designed grid-forming inverter (GFM) for single-phase micro-grid (SMGs). The SSI is designed for the conventional 100/200 V distribution network and is based on the concept of “Non-Interference Core (NIC) dynamic model”. Novel contributions of this paper are: (1) A root mean square (RMS) model of NIC-SSI was developed, combined with the conventional power system model, and verified through the comparison with the hardware-in-the-loop (HIL) simulation and SSI hardware experiments; (2) using the developed RMS simulation tool, the stabilization effect of the SSIs was investigated in condition under which the SSIs are massively installed in a distribution system; (3) off-grid SMG operations using SSIs under various ill-conditioned loads were demonstrated. The results show that the SSI has the considerable ability of grid stability enhancements for frequency, transient, and small-signal stabilities. The proposed SMG using SSIs is promising.

Funder

JSPS Grant-in-Aid for Scientific Research

New Energy and Industrial Technology Development Organization

Publisher

MDPI AG

Subject

Electrical and Electronic Engineering,Computer Networks and Communications,Hardware and Architecture,Signal Processing,Control and Systems Engineering

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