Predictive Direct Power Control for Dual-Active-Bridge Multilevel Inverter Based on Conservative Power Theory

Azuwien Aida Bohari, Hui Hwang Goh, Agustiono Kurniawan Tonni, Sze Sing Lee, Sy Yi Sim, Kai Chen Goh, Chee Shen Lim and Yi Chen Luo
Additional contact information
Azuwien Aida Bohari: Department of Electrical Power Engineering, Universiti Tun Hussein Onn Malaysia, Batu Pahat 86400, Malaysia
Hui Hwang Goh: School of Electrical Engineering, Guangxi University, Nanning 530004, China
Agustiono Kurniawan Tonni: Key Laboratory of the Coastal and Wetland Ecosystems, Ministry of Education, College of the Environment and Ecology, Xiamen University, Xiamen 361102, China
Sze Sing Lee: Newcastle Research & Innovation Institute, Newcastle University in Singapore, Singapore 609607, Singapore
Sy Yi Sim: Department of Electrical Power Engineering, Universiti Tun Hussein Onn Malaysia, Batu Pahat 86400, Malaysia
Kai Chen Goh: Department of Electrical Power Engineering, Universiti Tun Hussein Onn Malaysia, Batu Pahat 86400, Malaysia
Chee Shen Lim: School of Electronics and Computer Science, University of Southampton, Malaysia Campus, Nusajaya 79200, Malaysia
Yi Chen Luo: School of Electrical Engineering, Guangxi University, Nanning 530004, China

Energies, 2020, vol. 13, issue 11, 1-14

Abstract: This paper explores the feasibility of multilevel dual-active bridge-inverter (DABMI) applications for grid-connected applications of a modern Model of Predictive Direct Power Control (MPDPC) based on the conservative power theory (CPT). In the case of unbalanced grid voltages, the objective of the study is to promote continued active and reactive energy in MPDPC without reducing efficiency such as transient response and current harmonics. The nature of the instantaneous p-q theory permits only one out of three control targets to be fulfilled. The proposed control approached directly regulates the instantaneous active and reactive power to achieve three particular control objectives namely sinusoidal and symmetrical grid current, cancelling twice of fundamental grid frequency reactive power ripples, and removing twice grid frequency active power ripple. The techniques of complicated Grid part sequence extraction are unnecessary and improved at no extra expense, as is the case with current MPDPC fault-tolerant approaches. The instantaneous power at the next sampling instant is predicted with the newly developed discrete-time model. Each possible switching state will then be evaluated in the cost function defined until the optimal state which lead to the minimum power errors is determined. In MATLAB/Simulink simulation, the proposed CPT-based MPDPC measures reliability and performance at balanced and unbalanced grid voltages then compared with the conventional and existing MPDPC The proposed method manages to achieve all of three control targets which generates sinusoidal grid currents and attenuates active and reactive power ripple of twice the grid frequency exactly at the same time without losing its critical efficiency including transient reaction and current harmonics.

Keywords: unbalanced grid voltage; multilevel inverter; grid-connected application (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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