Grid-Forming Three-Phase Inverters for Unbalanced Loads in Hybrid Power Systems

Author

Ortjohann, Egon ; Arias, Arturo ; Morton, Danny ; Mohd, Alaa ; Hamsic, Nedzad ; Omari, Osama

Author_Institution

South Westphalia Univ. of Appl. Sci., Soest

Volume

2

fYear

2006

fDate

38838

Firstpage

2396

Lastpage

2399

Abstract

A key component at the grid side of a PV/hybrid power system (HPS) is the inverter. One of the desirable characteristics of inverters in three-phase systems is the ability to feed unbalanced loads with voltage and frequency nominal values. This paper introduces innovative three-phase inverter topologies in combination with an advanced control function able to feed isolated grids with unbalanced loads. Therefore, standardized advanced control functions based on symmetrical components will be used. In this paper a four leg power electronics topology in combination with the developed control algorithm is used to perform a three-phase symmetrical voltage source with a controlled neutral point. The advantages of the developed control function will be introduced and discussed by a simulation study

Keywords

hybrid power systems; invertors; photovoltaic power systems; power grids; power system control; control algorithm; feed isolated grids; four leg power electronics topology; frequency nominal values; grid-forming three-phase inverters; hybrid power systems; photovoltaic power system; symmetrical voltage source; three-phase inverter topologies; unbalanced loads; voltage nominal values; Batteries; Circuit topology; Feeds; Frequency; Hybrid power systems; Inverters; Leg; Photovoltaic systems; Power electronics; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Photovoltaic Energy Conversion, Conference Record of the 2006 IEEE 4th World Conference on

Conference_Location

Waikoloa, HI

Print_ISBN

1-4244-0017-1

Electronic_ISBN

1-4244-0017-1

Type

conf

DOI

10.1109/WCPEC.2006.279691

Filename

4060160