An Optimized Combination of a Large Grid Connected PV System along with Battery Cells and a Diesel Generator

TL;DR

This paper proposes a hybrid control method combining batteries, power curtailment, and diesel generators to reduce fluctuations in large grid-connected PV systems, aiming to improve stability and economic benefits.

Contribution

It introduces an integrated approach that optimizes the use of batteries, power curtailment, and diesel generators to control PV output fluctuations.

Findings

Reduced power fluctuations in PV systems.

Enhanced economic benefits for PV system owners.

Effective integration of storage and generation control methods.

Abstract

Environmental, economical and technical benefits of photovoltaic (PV) systems make them to be used in many countries. The main characteristic of PV systems is the fluctuations of their output power. Hence, high penetration of PV systems into electric network could be detrimental to overall system performance. Furthermore, the fluctuations in the output power of PV systems make it difficult to predict their output, and to consider them in generation planning of the units. The main objective of this paper is to propose a hybrid method which can be used to control and reduce the power fluctuations generated from large grid- connected PV systems. The proposed method focuses on using a suitable storage battery along with curtailment of the generated power by operating the PV system below the maximum power point (MPP) and deployment of a diesel generator. These methods are analyzed to investigate the impacts of implementing them on the economical benefits that the PV system owner could gain. To maximize the revenues, an optimization problem is solved.