<!DOCTYPE html> <html> <head><title>Microturbine Search Engine Series | Capstone Turbine Publications | Electromagnetic Transients of a Micro-Turbine Based Distributed Generation System | 001</title></head><body> <meta name= "description"content=" Information Publications | Publications Search Engine | On Demand PDF Document Searches "/> <meta name="keywords"content="capstone turbine, microturbine, Capstone C30,Capstone C65,Capstone C200,Capstone C600,Capstone C800,Capstone C1000"/><a href="http://www.globalmicroturbine.com"><img src="logo.jpg"alt="Global Microturbine - Global Energy LLC "></a></p> <BR> Publication Title | Electromagnetic Transients of a Micro-Turbine Based Distributed Generation System<BR><p><b>Microturbine Search Engine Series </b></p><p>Capstone Turbine Publications search was updated real-time via Filemaker on:</p> <script type="text/javascript">tmonth=new Array("January","February","March","April","May","June","July","August","September","October","November","December"); function GetClock(){ d = new Date(); nday = d.getDay(); nmonth = d.getMonth(); ndate = d.getDate(); nyear = d.getYear(); if(nyear<1000) nyear=nyear+1900; document.getElementById('clockbox').innerHTML=""+tmonth[nmonth]+" "+ndate+", "+nyear+""; setTimeout("GetClock()", 1000); } window.onload=GetClock; </script> <div id="clockbox"></div></p><a href='../index.htm'> Capstone Turbine Publications | Return to Search List </a><BR><BR><p>Search Completed | Title | Electromagnetic Transients of a Micro-Turbine Based Distributed Generation System<BR> Original File Name Searched: 05IPST070.pdf | <a href="https://www.google.com/search?q=05IPST070.pdf">Google It</a></a> | <a href="https://www.yahoo.com/search?q=05IPST070.pdf">Yahoo</a></a> | <a href="https://www.bing.com/search?q=05IPST070.pdf">Bing</a></a> </p><p><br /></p><BR> Page Number: 001<BR><a href="micro-turbine-troubleshooting-procedures-022.htm">Previous Page View</a> | <a href="electromagnetic-transients-micro-turbine-based-distributed-generation-system-002.htm">Next Page View</a><BR><TABLE border='1' style=width='1200'><TR><TD valign='top'> <p>Text | Electromagnetic Transients of a Micro-Turbine Based Distributed Generation System | 001</p><BR><BR><span style="" >Electromagnetic Transients of a Micro-Turbine Based Distributed Generation System<br/><br/>H. Nikkhajoei, Member, IEEE, R. Iravani, Fellow, IEEE<br/><br/>Abstract&mdash; This paper evaluates the electromagnetic transients of a micro-turbine based distributed generation system that in- cludes an AC-DC-AC converter. An outline of modelling the micro-turbine based generation system including the AC-DC-AC converter is presented. A controller for the converter, that consists of a number of single-input single-output sub-controllers, is de- signed based on the developed model of the system. Furthermore, the thermodynamic model of micro-turbine system is presented. The electromagnetic transients of the overall micro-turbine based generation system including the micro-turbine and converter con- trollers are evaluated based on time-domain simulation studies in the PSCAD/EMTDC software environment. The study considers the dynamic models of generator, converter and power system and the thermodynamic model of micro-turbine system.<br/><br/>Index Terms&mdash;Electromagnetic Transient, Micro-Turbine Gen- erator, Distributed Generation, Dynamic Model, AC-DC-AC Con- verter, Control Design, Thermodynamics.<br/><br/>I. INTRODUCTION<br/><br/>THE Micro-Turbine Generator (MTG) has emerged as a viable source of electric energy in the context of Dis- tributed Generation (DG) [1]-[3]. It can also provide power de- mand for remote military/commercial applications, as a stand- alone generator unit. An MTG unit is usually a high-speed (up to 120 krpm) rotating machine with the output power of up to a few hundreds of kilowatts, and the output frequency of higher than 50/60 Hz (e.g. 400 Hz and up to several kHz). Thus, it is interfaced through a power electronic con- verter to the load/utility system. The converter provides con- version/control of frequency as well as control of the output voltage and power flow of the MTG-converter module. Differ- ent types of AC-AC conversion systems, e.g. matrix converter [4], [8] or AC-DC-AC converter, can be adopted as the power electronic interface of an MTG unit. However, the AC-DC-AC based configuration is conventionally used for the MTG unit [5]-[7]. In this configuration, the MTG-side converter is either<br/><br/>converter. The model is based on transformation of the sys- tem equations to a Switching Reference Frame (SRF) [4] and then to the dqo reference frame. The dqo reference frame is selected such that the operating parameters of system can be independently controlled. As a result, the multi-input multi- output converter system is decomposed to a number of Single- Input Single-Output (SISO) sub-systems. For each subsystem, a SISO controller is systematically designed.<br/><br/>The thermodynamic behavior of micro-turbine system is ad- dressed in this paper and the corresponding thermodynamic model is presented. Based on this model, a fast response con- troller is designed for the micro-turbine system. The thermody- namic model is incorporated in the dynamic model of the MTG system since thermodynamics of the high-speed micro-turbine has a fairly small time constant which is comparable to that of the electromagnetic transients of a 50/60 Hz power system [4], [8]. The electromagnetic transient behavior of the overall MTG system including the designed controllers is evaluated based on digital time-domain simulation studies.<br/><br/>II. CONVERTER MODEL<br/><br/>Fig. 1 shows schematic diagram of a back-to-back VSC that interfaces two AC systems with nominal frequencies of &omega;i and &omega;o. The AC systems are referred to as source-side and network- side systems, and are simplified representations of a micro- turbine generator and a utility distribution system, respectively.<br/><br/>VSC <br/><br/>Rectifier &omega; <br/><br/>&omega; Inverter o <br/><br/>1<br/><br/>i <br/><br/>i di id o <br/><br/>Micro-Turbine Generator (Source Side) <br/><br/>Inp<br/><br/>Output <br/><br/>Utility System (Network Side) <br/><br/>ut <br/><br/>S 1 S 2 S 3 <br/><br/>v ai <br/><br/>+ <br/><br/>v dc <br/><br/>- <br/><br/>i C <br/><br/>C <br/><br/>S 4 <br/><br/>S 4 <br/><br/>S 5 S 6 <br/><br/>ia si R si L si <br/><br/>i bsi ic si <br/><br/>v R so L so ia so ao <br/><br/>vb o ib so vc o ic so <br/><br/>vc so vb so va so <br/><br/>v bi <br/><br/>v ci <br/><br/>a diode-rectifier, a thyristor-rectifier or a Voltage-Sourced Con- v verter (VSC) and the utility side converter is often a VSC unit, Fig. 1.<br/><br/>v <br/><br/>asi bsi csi <br/><br/>v <br/><br/>S 1 S S 2 3 <br/><br/>S S 6 5 <br/><br/>The main focus of this paper is to study the electromagnetic transient behavior of an AC-DC-AC based MTG system. This paper also presents a detailed dynamic model of the overall system that is used to design a controller for the AC-DC-AC<br/><br/>&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;- &mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash; H. Nikkhajoei and R. Iravani are with the Center for Applied Power Electronics (CAPE), Department of Electrical and Computer Engineering, University of Toronto, 10 King&rsquo;s College Road, Toronto, Ontario M5S 3G4, Canada. E-mails: h.nikkhajoei@utoronto.ca, iravani@ecf.utoronto.ca &mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash;- &mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash; Presented at the International Conference on Power Systems Transients (IPST&rsquo;05) in Montreal, Canada on June 19-23, 2005, Paper No. IPST05-070<br/><br/>Fig. 1. back VSC<br/><br/>A. Switching Reference Frame based Model<br/><br/>The theoretical concept of Switching Reference Frame (SRF) is introduced in [4], [8]. For a back-to-back VSC, transforma- tion to the SRF for the rectifier module, Fig. 1, is defined by<br/><br/>s<br/><br/>Fi = SRFsi, (1)<br/><br/>Schematic representation of two AC systems interfaced by a back-to-<br/><br/></span></TD><TD valign='top'><p>Image | Electromagnetic Transients of a Micro-Turbine Based Distributed Generation System</p><BR><BR><img src='../images/electromagnetic-transients-micro-turbine-based-distributed-generation-system-001.jpg' alt='electromagnetic-transients-micro-turbine-based-distributed-generation-system ' style='margin-left:20px;border-style:solid;border-width:1px;border-color:black;'> </TD></TR></TABLE><table border=1px solid blackstyle =width:50%> <tr> <td><b>Capstone Turbine For Sale </b>- Microturbine C30 C65 C200 C600 C800 C1000 - <a href="http://www.globalmicroturbine.com">Go to microturbine website</a> </td> </tr> </tr> </table> <p> </p> <script> (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){ (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o), m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m) })(window,document,'script','https://www.google-analytics.com/analytics.js','ga'); ga('create', 'UA-85515761-1', 'auto'); ga('send', 'pageview'); </script><address> <p>Search Engine Contact: <a href="mailto:greg@globalmicroturbine.com?subject="Microturbine">greg@globalmicroturbine.com</a></p><p><br /></p></body></html>