A sensor-less sliding mode control scheme for a stand-alone wound rotor synchronous generator under unbalanced load conditions
Location: UK
Publication date: 2014-03-08
Published in: International journal of electrical power and energy systems, September 2014
ref. DOI: 10.1016/j.ijepes.2014.03.003

Local members

Alvaro Luna

PhD. Senior Researcher.

Jose Ignacio Candela

PhD. Senior Researcher. Project Responsible

External members

Doria-Cerezo, A.



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 and experimental results validate the control law and show good performance and a fast response to load and reference changes.


Associated projects

National public