Micro-grid connected/islanding operation based on wind and PV hybrid power system

Abstract

The micro-grid technology that integrates distributed generations, energy storage element and loads is an effective approach to solve the interconnection of large-scale distributed generations with power grid. Wind and solar can be complementary to each other in time, therefore wind and PV hybrid power system could make full use of clean energy and have high reliability. Smooth switching between grid-connected mode and islanding mode is important to micro-grid stable operation. In this paper a micro-grid model based on wind and PV hybrid power system is built with DigSILENT/PowerFactory. The improved control strategy of P-Q control and droop control combination is proposed and the transition state simulation as to the micro-grid mode switching process is carried out. The result shows that this advanced control strategy can ensure power balance and reasonable power assignment ， it also could keep connected bus voltage and micro-grid frequency stable during micro-grid mode switching. Index Terms--Distributed power generation, droop control ， islanding mode, master-slave control strategy, micro-grid, P-Q control, peer-to-peer control strategy, wind and PV hybrid power system.

A Review of Hybrid Renewable Energy Systems and MPPT Methods

“…The system was built using DigSILENT Power Factory software. The control was hybrid and the controls were P-Q control and droop control [39]. Goel and Ali prepared a feasibility analysis study of the electrification in Odisha India by using Hybrid energy sources by using HOMER.…”

“…[1], [30], [34], [45][46] Wind-PV [1], [31][32], [37][38][39], [48], [52], [54], [57][58][59][60][61], [63], [71] Wind-PV-Fuel Cell There are 4 studies about the renewable hybrid study. The system efficiency.…”

Microgrid

“…Most of the nations started investing in renewable energy power plants for long-term growth based on their energy growth requirements as shown in Figure 1. Since last few years, global investment on renewable energy sources exceeds four trillion billions and in is expected much more in coming years [1][2][3][4][5].…”

Design for independent and self‐adequate microgrids in distribution systems considering optimal allocation of DG units

“…Microgrids can operate in grid‐connected and islanded modes and ride through between these modes [12]. It is noteworthy that self‐adequacy of MGs would have several benefits such as independent and efficient performance in islanded mode, avoiding disturbance propagation in grid‐connected mode and low risky ride‐through mode.…”