Analysis of Control Strategies Based on Virtual Inertia for the Improvement of Frequency Stability in an Islanded Grid with Wind Generators and Battery Energy Storage Systems

Abstract

Rising levels of non-synchronous generation in power systems are leading to increasing difficulties in primary frequency control. In response, there has been much research effort aimed at providing individual electronic interfaced generators with different frequency response capabilities. There is now a growing research interest in analyzing the interactions among different power system elements that include these features. This paper explores how the implementation of control strategies based on the concept of virtual inertia can help to improve frequency stability. More specifically, the work is focused on islanded systems with high share of wind generation interacting with battery energy storage systems. The paper presents a methodology for modeling a power system with virtual primary frequency control, as an aid to power system planning and operation. The methodology and its implementation are illustrated with a real case study.

Research on time-invariant virtual inertia control strategy for controllable rectifier load

“…In energy storage devices, literature [4] analyzes in detail the mechanism of providing virtual inertia to the system with only energy storage virtual synchronous machines. Literature [5] adjusts the power system frequency by introducing virtual inertia algorithms in batteries and wind turbines. Literature [6] proposes a flexible control strategy for virtual inertia under multi-light storage unit coordination.…”

Uso de supercondensadores para brindar soporte de frecuencia en una microrred aislada

“…En respuesta a los desafíos de estabilidad causados por la baja inercia del sistema debido a la alta penetración de DER, en la literatura se han propuesto nuevos conceptos para la provisión de soporte rápido de frecuencia en el contexto de una microrred (Tamrakar et al, 2017;Ochoa & Martinez, 2018;Fernández-Guillamón et al, 2020;Pazmiño et al, 2021;Ali et al, 2021;Sarmiento-Vintimilla et al, 2022). Casi la totalidad de las soluciones consultadas explotan el concepto de "inercia virtual" y precisan de un colchón energético (propio o externo) para que factibilicen su implementación práctica.…”

Modeling and Harmonic Impact Mitigation of Grid-Connected SCIG Driven by an Electromagnetic Frequency Regulator

“…However, one of the main drawbacks in the application of such devices is the lack of natural inertia, which can originate voltage or frequency stability issues, indeed with the increasing penetration of intermittent sources in the electrical grid, as solar and wind turbine topologies [1]. Energy storage applications have been proposed to mitigate the intermittent effect, primary frequency control, and power dispatch regulation [2,3]. However, such technologies increase the complexity due to the addition of distributed energy storage devices as batteries, flywheels, and supercapacitors.…”