Towards Fast, Flexible and Sensor-Free Control of Standalone PVDG Systems

TL;DR

This paper proposes sensor-free, fast, and stable control methods for standalone photovoltaic systems, leveraging advanced estimation techniques and IC technology to improve efficiency and reduce costs during intermittencies.

Contribution

It introduces novel sensor-free control and MPPT algorithms for SPVDG systems, utilizing IC-based parameter estimation to enhance stability and speed.

Findings

Achieved faster voltage regulation and MPPT without sensors.

Demonstrated improved stability during power fluctuations.

Reduced system costs by eliminating sensors.

Abstract

In this thesis, the problem of fast, effective and low cost control of a Standalone Photovoltaic Distributed Generation (SPVDG) system is considered . On-site generation from these systems is more efficient when the power is transmitted via DC due to elimination of transmission losses and needless energy conversions. The inherent low-inertia of these systems added with fluctuation of output power and uncertain load consumption, calls for advanced control techniques to ensure fast and stable operation during various intermittencies. These techniques are expensive since they demand installation of many sophisticated sensors. The computation power provided by the fast growing IC technology can be utilized to estimate different parameters in a system and reduce the need for expensive sensing equipment. This work provides solutions to problems encountered in the development of faster, more stable and sensor-free voltage control and maximum power point tracking(MPPT) for SPVDG systems with PV and battery.