Work

Enhancement of DC‐bus voltage regulation in cascaded converter system by a new sensorless load current feedforward control scheme

Year: 2021

Type: article

Abstract: It is generally known that, with conventional PI control, the stability and dynamic response performances of a power converter cannot be optimized simultaneously. To overcome this limitation, an uncertainty and disturbance estimator assisted sensorless load current feedforward control for dc‐bus voltage regulation is presented to achieve fast dynamic response to load variations while stability is guaranteed by tuning PI controller. The proposed control scheme is verified on a cascaded converters system comprising a front end dc‐dc DAB converter followed by a single‐phase inverter as an illustrative case. Load‐current feedforward is used to enhance the transient response of the front end DAB converter while an uncertainty and disturbance estimator is used to compensate for any non‐idealities arising from model uncertainties and error in load current estimation. To validate the proposed control scheme, experimental results obtained from a 250‐W cascaded converter system are presented and compared rigorously to the performance of conventional PI control.

Source: IET Power Electronics

DOI: 10.1049/pel2.12123

Authors: Majid Ali, Muhammad Yaqoob, Lingling Cao, Ka‐Hong Loo

Institutions: Namal University, Huawei Technologies (Sweden), Harbin Institute of Technology, Hong Kong Polytechnic University

Language: English

Topic: Advanced DC-DC Converters

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Affordable and clean energy, Industry, innovation and infrastructure

Open Access status: gold

Estimated APC paid: $2,800