Application of synchronous grid-connected controller in the wind-solar-storage micro grid

Abstract

Original scientifica paper Recently, there has been an increasing interest in using distributed generators (DG) not only to inject power into the grid, but also to enhance the power quality. In this study, a space voltage pulse width modulation (SVPWM) control method is proposed for a synchronous grid-connected controller in a wind-solar-storage micro grid. This method is based on the appropriate topology of the synchronous controller. The wind-solar-storage micro grid is controlled to reconnect to the grid synchronously while maintance or repair is being completed to the power source equation DG at some point, the voltage difference that exists between DG and both sides of the node, a large and sudden electrical surge when DG is reconnected to the grid. It also affects the normal work of the other DG and power quality of a necessary load, and could even seriously paralyze the whole system. So, the topological structure and control method of the synchronous grid-connected controller are discussed in detail and simulation results are presented. The results demonstrate the effectiveness of the proposed method in the synchronous grid-connected controller for the wind-solar-storage micro grid. Keywords: distributed generator (DG); micro grid; SVPWM; synchronous grid-connected controllerPrimjena sinkronog mrežno povezanog upravljačkog uređaja u mikro mrežu pohrane energije vjetra-sunca Izvorni znanstveni članak U zadnje je vrijeme poraslo zanimanje za uporabu raspodjelnih generatora (DG) ne samo za uključivanje energije u mrežu već i za poboljšanje kvalitete energije. U ovom se radu predlaže metoda regulacije SVPWM (space voltage pulse width modulation) za sinkroni mrežno povezani upravljački uređaj u mikro mrežu pohrane energije vjetra-sunca. Ta se metoda zasniva na odgovarajućoj topologiji sinkronog upravljačkog uređaja. Mikro mreža pohrane energije vjetra-sunca upravlja se tako da se istovremeno uključi u mrežu dok se ne završi održavanje ili popravi ujednačeni izvor energije DG u nekoj točki, razlika u naponu koja postoji između DG i obje strane čvora, naglo povećanje električne energije kada se DG ponovo uključuje u mrežu. To također utječe na normalan rad drugog DG i na kvalitetu potrebnog opterećenja, a moglo bi čak i ozbiljno paralizirati čitavi sustav. Stoga se topološka struktura i kontrolne metode sinkronog upravljačkog uređaja detaljno analiziraju i prezentiraju se rezultati simulacije. Prezentirani rezultati pokazuju učinkovitost predložene metode sinkronog upravljačkog uređaja povezanog s rešetkom u mikro mrežu pohrane energije vjetra-sunca.Ključne riječi: raspodjelni generator (DG); mikro mreža; sinkroni mrežno povezani upravljački uređaj; SVPWM

Research on the stability of Multi-DGs system

“…These DGs in the system can produce substantial clean energy and alleviate energy crisis. Many types of DGs such as wind turbine generators, fuel-cells, PV cells and micro-turbines are interfaced to the distribution electronic system through power electronic converters [3]. With the expansion of wind power, the impact of wind power on the synchronous power grid is becoming more and more significant.…”