Revisiting Numerical Integration Methods for Digital Implementation in Power Electronics Applications

Palmal, M and Roja, P and John, V (2023) Revisiting Numerical Integration Methods for Digital Implementation in Power Electronics Applications. In: 2023 11th National Power Electronics Conference, NPEC 2023, 14-02-2023 to 16-12-2023, Guwahati.

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Abstract

Digital control systems are vital to power electronic applications because of their flexibility and reconfigurability features. The controller is typically designed in s-domain and is later transformed to z-domain using traditional numerical methods such as forward Euler, backward Euler, and Tustin approximations. In this paper, higher-order numerical methods, namely Adam-Bashforth's third- and fourth-order methods for integration, are discussed. The associated errors and stability aspects are discussed. The constraints and limitations of z-operator-based resonant controller at a very high sampling frequency are presented. These limitations are addressed using δ-operator-based resonant controller. A nested sub-routine to implement these sub-controller blocks based on priority is discussed. These numerical integration methods are validated on TMS320F28379D DSP-based digital launchpad. © 2023 IEEE.

Item Type:	Conference Paper
Publication:	2023 11th National Power Electronics Conference, NPEC 2023
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords:	Controllers; Integration; Numerical methods; Phase locked loops; Power electronics, Digital controllers; Digital implementation; Interrupt service routine; Nested interrupt service routine; Numerical integration methods; Power electronic applications; Reconfigurability; Resonant controller; S-domain; SOGI, Digital control systems
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	04 Mar 2024 09:11
Last Modified:	04 Mar 2024 09:11
URI:	https://eprints.iisc.ac.in/id/eprint/84222

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