A new generalized predictive current control algorithm with integration of fractional part function based modulation technique: Single phase self‐balanced type multilevel inverter topologies

Abstract

SummaryIt is generally impossible to control the inverter output current (IOC) based on operator needs if only pulse width modulation (PWM) techniques are used. Conventionally, authors have reported the finite control set‐based predictive current control algorithm (FCS‐PCCA) to control the IOC with a fast dynamic response. However, this type of algorithm without a PWM stage generates a variable switching frequency (VSF) of operation, and it leads to filter design problems, inequitable thermal stress, and more current distortions that have been presented. To alleviate all these issues, a new generalized PCCA with the integration of a fractional part function‐based single carrier modulation technique (G‐PCCA‐FPF‐SCMT) has been proposed, and it provides constant switching frequency (CSF) of operation. In this technique, the normalized optimum inverter output voltage (N‐O‐IOV) has been fed with FPF‐SCMT. The particular modulation stage implementation is straightforward since even inverter level number increases, the number of references and triangular carrier signals is always only one. The complete control implementation process of the proposed technique is extremely low compared with all traditional CSF‐based PCCAs. To verify the proposed technique experimentally in both steady and transient state operations, one of the conventional five‐level switched capacitor‐based inverter topologies has been considered and elucidated vividly in both open‐loop and closed‐loop operations.

A Comprehensive Review of Compensation Control Techniques Suitable for Cascaded H-Bridge Multilevel Inverter Operation with Unequal DC Sources or Faulty Cells

“…The use of simplified and optimized modulation techniques during the system's unbalanced operation will be a promising control solution. In recent years, single-carrier (SC-PWM) PWM methods have become more prevalent in multilevel converter topology control systems [70][71][72][73]. Compared to traditional multi-carrier PWM techniques or space vector-based techniques, they present a straightforward real-time implementation while achieving acceptable harmonic performances [73].…”

“…In recent years, single-carrier (SC-PWM) PWM methods have become more prevalent in multilevel converter topology control systems [70][71][72][73]. Compared to traditional multi-carrier PWM techniques or space vector-based techniques, they present a straightforward real-time implementation while achieving acceptable harmonic performances [73]. Developing compensation control methods based on an SC-PWM algorithms is needed.…”