%0 Journal Article
%T Inverter-Based Diesel Generator Emulator for the Study of Frequency Variations in a Laboratory-Scale Autonomous Power System
%A Miguel Torres
%A Luiz A. C. Lopes
%J Energy and Power Engineering
%P 274-283
%@ 1947-3818
%D 2013
%I Scientific Research Publishing
%R 10.4236/epe.2013.53027
%X <p style=\"text-align:justify;\" class=\"MsoNormal\">
	<span lang=\"EN-US\">This paper presents the modeling, simulation and practical implementation of an inverter-based diesel generator emulator. The main purpose of this emulator is for the study of frequency variations in diesel-based autonomous power systems in a laboratory environment where the operation of a real diesel generator is not possible. The emulator basically consists in a voltage source inverter with a second order output filter which voltage references are given by the model of the diesel generator. The control of the emulator is based on the digital signal processor TMS<?xml:namespace prefix = st1 /><st1:chmetcnv w:st=\"on\" tcsc=\"0\" numbertype=\"1\" negative=\"False\" hasspace=\"False\" sourcevalue=\"320\" unitname=\"F\">320F</st1:chmetcnv>2812, where the mathematical models of the diesel generator and the control of the inverter are computed in real-time. Parameters for the model were obtained from commercially available components. Experimental results for different values of speed droop showed that the emulator achieves a satisfactory performance in the transient and stationary response. For the stationary response, the measured frequency deviates from theoretical values with a mean absolute error of: 0.06</span><span lang=\"EN-US\"> </span><span lang=\"EN-US\">Hz for 0% droop, 0.037 Hz for 3% droop, and 0.087 Hz for 5% droop. For the transient response, the measured frequency nadir deviates from simulations in: 0.05 Hz for 0% droop, 0.02 Hz for 3% droop, and 0.1 Hz for 5% droop.</span><span lang=\"EN-US\"><?xml:namespace prefix = o /><o:p></o:p></span> 
</p>
%K Diesel Generator
%K Emulator
%K Inverter
%K Frequency Control
%K Mini-Grid
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=31273