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Stability boundary analysis in single-phase grid-connected inverters with PLL by LTP theory (2017)
Journal Article
Salis, V., Costabeber, A., Cox, S. M., Zanchetta, P., & Formentini, A. (2018). Stability boundary analysis in single-phase grid-connected inverters with PLL by LTP theory. IEEE Transactions on Power Electronics, 33(5), 4023-4036. https://doi.org/10.1109/TPEL.2017.2714860

Stability analysis of power converters in AC net¬works is complex due to the non-linear nature of the conversion systems. Whereas interactions of converters in DC networks can be studied by linearising about the operating point, the extension of the... Read More about Stability boundary analysis in single-phase grid-connected inverters with PLL by LTP theory.

Stability Assessment of Power-Converter-Based AC systems by LTP Theory: Eigenvalue Analysis and Harmonic Impedance Estimation (2017)
Journal Article
Salis, V., Costabeber, A., Cox, S. M., & Zanchetta, P. (2017). Stability Assessment of Power-Converter-Based AC systems by LTP Theory: Eigenvalue Analysis and Harmonic Impedance Estimation. IEEE Journal of Emerging and Selected Topics in Power Electronics, 5(4), 1513-1525. https://doi.org/10.1109/jestpe.2017.2714026

Stability analysis of power-converter-based AC systems poses serious challenges not only because of the non-linear nature of power converters, but also because linearisation is not generally applied around a steady-state operating point, as in the DC... Read More about Stability Assessment of Power-Converter-Based AC systems by LTP Theory: Eigenvalue Analysis and Harmonic Impedance Estimation.

Small-signal analysis of naturally-sampled single-edge PWM control loops (2017)
Journal Article
Mouton, T., Cox, S., McGrath, B., Risbo, L., & Putzeys, B. (2017). Small-signal analysis of naturally-sampled single-edge PWM control loops. IEEE Transactions on Power Electronics, 33(1), 51-64. https://doi.org/10.1109/TPEL.2017.2666720

This paper presents a simple method to analyse the behaviour of feedback loops that contain a naturally-sampled single-edge pulse-width modulator. A small-signal model is derived by means of simple geometric arguments. It is shown how this small-sign... Read More about Small-signal analysis of naturally-sampled single-edge PWM control loops.