Our paper entitled “Improved Eigenvalue Sensitivity Method for Designing Power System Damping Controllers” was presented at the CIGRE Symposium 2025 in Trondheim, Norway. The symposium was held in Trondheim on May 12–14, 2025.

The summary of the paper is as follows:

Inter-area oscillations are a major challenge for power systems, as they can lead to system instability if they are not damped. To prevent such, restrictions on power transmission over specific lines are often necessary, which in turn incur significant economic costs. This justifies the need to improve the tuning of Power Oscillation Damping Controllers (PODs). PODs can be implemented in synchronous generators, FACTS devices, HVDC links, and BESSs.

Lead-lag controllers are widely used in the industry for their simplicity and effectiveness. The eigenvalue sensitivity method applied to the tuning of lead-lag controllers, enables direct determination of controller parameters, making the method particularly efficient for practical applications.

With the eigenvalue sensitivity method, the trajectory of the eigenvalue is assumed to be linear and defined by the sensitivity calculated for the initial position of the eigenvalue. However, the eigenvalue trajectory is not necessarily linear and may deviate from the sensitivity, especially in the case of high gain values.

In response to these limitations, this work introduces two approaches to optimize both the gain and the structure of a POD tuned using the sensitivity method. A well-known study case is used to illustrate the sensitivity method’s limitations and the proposed solutions’ effectiveness.

📋 Full paper : Improved Eigenvalue Sensitivity Method for Designing Power System Damping Controllers

If you have any questions or comments on it, please do not hesitate to contact us! We would be happy to discuss it.

Thank you to the Nordic Regional Council of CIGRE (NRCC) for organizing a rich and engaging conference. Looking forward to participating in new events!

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Beautiful Trondheim!