A new study by the team at CIRCE has been published in the International Journal of Electrical Power & Energy Systems.
The research paper Damping control in renewable-integrated power systems: A comparative analysis of PSS, POD-P, and POD-Q strategies addresses the growing challenge of low-frequency oscillations in power systems with increasing renewable energy integration, which can affect grid stability and reliability.
A comparative analysis of three key damping controllers has been performed:
- Power System Stabilizers (PSS), widely implemented in synchronous generators for decades.
- Power Oscillation Damping using active power modulation (POD-P).
- Power Oscillation Damping using reactive power modulation (POD-Q).
Using simulations based on the IEEE 39 Bus model and DIgSILENT PowerFactory, the effectiveness of each controller under different grid conditions is evaluated. Here are the main findings:
- With proper parameterization, PSS can effectively damp local and inter-area oscillations.
- Activating POD-Q and PSS may sometimes reduce stability in other modes.
POD-P emerged as the most versatile and effective controller, especially in grids with high renewable penetration, making it the recommended solution for systems with oscillation variability. - The effectiveness of POD-Q and PSS depends significantly on the contribution of the generators and the oscillation characteristics.
- PSS may fail to stabilize modes if its generator lacks active participation in the oscillation.
- POD-P controllers demonstrated higher versatility and effectiveness in scenarios with high renewable penetration.
The research provides valuable insights for enhancing grid stability as renewable integration grows.
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