Title :
Sensor-less Sliding Mode Control of a stand-alone wound rotor synchronous generator with unbalanced load
Author :
Muñoz-Aguilar, R.S. ; Rodríguez, P. ; Dòria-Cerezo, A. ; Candela, I. ; Luna, A.
Author_Institution :
Dept. of Electr. Eng., Univ. Politec. de Catalunya, Terrassa, Spain
Abstract :
This paper presents a Sliding Mode Control for a wound rotor synchronous machine acting as an isolated generator connected to an unbalanced load. In order to simplify the control methodology, the standard dq-model of the machine is connected to a balanced resistive load. A switching function is defined in order to fulfill the control objective. From the desired surface, the standard sliding methodology is applied to obtain a robust and very simple controller. Then, the actual measured voltage of the machines is acquired and treated trough a frequency locked loop algorithm in order to extract the positive sequence and control it to guarantee a good definition of the park transformation. A phase locked loop algorithm is also used to avoid speed sensors. Numerical simulations a validate the control law and show good performance and a fast response to load and reference changes.
Keywords :
frequency locked loops; machine windings; numerical analysis; phase locked loops; robust control; rotors; sensorless machine control; synchronous generators; variable structure systems; balanced resistive load; frequency locked loop algorithm; isolated generator; load changes; machine dq-model; numerical simulations; park transformation; phase locked loop algorithm; positive sequence extraction; reference changes; robust controller; sensor-less sliding mode control; speed sensor avoidance; stand-alone wound rotor synchronous generator; switching function; unbalanced load; wound rotor synchronous machine; Frequency locked loops; Rotors; Simulation; Stators; Switches; Voltage control;
Conference_Titel :
IECON 2011 - 37th Annual Conference on IEEE Industrial Electronics Society
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-61284-969-0
DOI :
10.1109/IECON.2011.6119960