Three-phase multifunctional grid-tied inverter for compensation of oscillating instantaneous power

Author(s)

José de Arimatéia Olímpio Filho

• Document type: Master's Dissertation
• Press: Bauru. 2019-12-13.
• Institution: Universidade Estadual Paulista (Unesp). Faculdade de Engenharia. Bauru
• Defense date: 2019-11-07
• Advisor: Helmo Kelis Morales Paredes; Fernando Pinhabel Marafão; Jakson Paulo Bonaldo

Abstract

This master’s thesis proposes the development and implementation of a compensation strategy for the three-phase multifunctional grid-tied inverter. The reference signal generation method for grid-tied is based on the Conservative Power Theory (CPT). In this work, the multifunctional inverter plays the role of the Utility Interface (UI) which perform several functions: in grid-connected operation, it injects active power into the grid and compensates the instantaneous power oscillation and the instantaneous reactive energy oscillation. The goal is to execute theoretical studies and computational simulations to validate the proposed strategy. For this purpose, firstly are identifies the unwanted currents which allow the compensation of the oscillatory terms of instantaneous power and reactive energy. The inverter is controlled in current mode through PWM modulation strategy with two control loops. In addition, the proposed compensation strategy and control system is evaluated and tested for different load configurations, such as linear and nonlinear loads (balanced and unbalanced) operating under different voltage conditions (distorted and unbalanced). Finally, experimental results are presented to validate the effectiveness and performance of the proposed compensation strategy. (AU)

• FAPESP's process: 17/20987-5 - Three-phase multifunctional Grid-Tie inverter for compensation instantaneous power oscillations
• Grantee: José de Arimatéia Olímpio Filho
• Support Opportunities: Scholarships in Brazil - Master