A series-parallel PV-storage independent microgrid and its decentralized control

Abstract

Summary This paper presents a series‐parallel photovoltaic (PV)‐storage independent microgrid (MG), where low‐voltage distributed generation units could be connected to power grid conveniently. Moreover, it provides a promising way to form medium voltage MG. For this proposed structure, a decentralized control is proposed. The PV units are controlled by a maximum power point tracking (MPPT)‐based droop control, where MPPT of the PV units is achieved. Storage units are regulated via a “droop” controller dependent its reactive power polarity and take the responsibility of keeping the power supply‐demand balance of the MG. Since all these controllers make decisions only based on their local information, the proposed control is reliable and cost‐effective. Moreover, the small‐signal stability of the system is proved. And simulation results are presented to verify the effectiveness.

Fuzzy logic controller-based enhancement for grid-connected large-scale PV systems

“…The fundamental unit of solar panels-the solar cell-holds profound importance. It is through the orchestration of numerous solar cells in configurations that span both series and parallel interconnections that the broader photovoltaic module is created [56][57][58][59][60][61][62]. By arranging PV modules in series, the resultant output attains maximum voltage potential, while parallel connections maximize the achievable output current.…”

Unified decentralised control for both grid‐connected and islanded operation of cascaded‐type microgrid

“…The concept of a microgrid is firstly proposed in 2002 by Lasseter [7]. It could integrate DGs, energy storages and loads into the modern power distribution system to maintain a high level of service and reliability [8][9][10].…”