This paper proposes a sensorless second-order switching surface to control a three-level boost converter (TLBC). A predictive current method is proposed to reduce the number of sensors in the normal second-order switching surface method. Based on a developed model of the TLBC, the current is estimated and a switching surface is formulated in the state-energy plane. Simulation and hardware tests are carried out to verify the viability and the effectiveness of the proposed control technique. Results obtained show a good performance of the converter in term of DC-bus balancing and fast dynamic response under sudden load change.
Boundary control, predictive control, second-order switching surface, sensorless current control
MESSIKH, TAREK; RAHIM, NASRUDIN ABD; and MEKHILEF, SAAD
"Sensorless second-order switching surface for a three-level boost converter,"
Turkish Journal of Electrical Engineering and Computer Sciences: Vol. 27:
1, Article 2.
Available at: https://journals.tubitak.gov.tr/elektrik/vol27/iss1/2