Frequency stability in modern power systems with 100% renewable energy penetration
Year: 2025
Type: article
Abstract: The share of renewable energy sources (RES) contributing to electricity supply within power systems has seen a notable increase. However, this development has been paralleled by a significant decline in both the capacity and quantity of synchronous generator units, resulting in a considerable decrease in the equivalent inertia of the power system. This reduction in inertia may adversely affect the frequency stability of the power system. This paper illustrates that while the inertia provided by synchronous generators can be diminished to a certain degree, excessive reduction due to heightened RES integration may render the power system unstable concerning frequency. The study calculates the minimum requisite inertia for ensuring frequency stability and utilizes this value to establish a boundary stability line for the power system. A viable control strategy is proposed to safely navigate across this instability boundary and enhance frequency stability in a power system characterized by high penetration of RES generators. Simulation outcomes indicate that without an appropriate control strategy, the power system is prone to frequency fluctuations. The recommended approach entails disconnecting all remaining synchronous generators from the power system once the calculated threshold for minimum inertia reduction is reached. Consequently, it is advised that suitable controllers be employed within this proposed strategy to uphold frequency stability in a power system with substantial RES integration
Source: Results in Engineering
Institution: University of Tabriz
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,940
OpenAlex ID: W4416497914