The Effect of Frequency Droop Damping on System Parameters and Battery Sizing During Load Change Condition

TL;DR

This paper investigates how frequency droop damping affects system stability, frequency response, and battery sizing in inverter-based power systems, highlighting the importance of optimal droop control for cost-effective energy storage.

Contribution

It introduces an analysis of frequency droop damping effects on system parameters and proposes a method for optimal battery sizing based on simulation results.

Findings

Frequency droop damping influences system frequency stability.

Optimal damping settings are crucial for cost-effective battery sizing.

Simulation results demonstrate the impact of droop control on system performance.

Abstract

Inverter-based resources (IBR) have been widely studied for their advantages on the current power systems. This increase in the penetration of renewable energy has raised some concerns about the stability of the existing grid. Historically, power systems are dominated by synchronous generators that can easily react to system instability due to high inertia and damping characteristics. However, with IBR, the control of the inverter plays a crucial role in contributing to the system stability and enhancing the functionality of the inverters. One of these novel control methods is droop control. Droop characteristics are used to control voltage, frequency, and active and reactive power. This paper presents the impact of frequency droop damping on system frequency, real power, and the rate of change of frequency with distributed energy resources. Also, battery sizing is suggested based on the results. The results also show the need for optimal selection for the frequency droop damping to fulfill the appropriate battery size in terms of cost and performance. The simulations are carried out in an electromagnetic transient program (EMTP)