| 摘要 |
The present disclosure relates to a Voltage Source Converter (VSC) control system (1) for active damping (AD) of a resonance oscillation in the VSC. The control system comprises a regular Phase-Locked Loop (PLL) (2), and a slow PLL (3). The control system is arranged such that the imaginary (q) part of the AD signal is obtained from the slow PLL. The slow PLL is configured for having a closed-loop bandwidth less than the frequency of the resonance oscillation to be dampened. The second PLL (3) is required to solve stability issues resulting from the negative impedance effect of the PLL (2) control loop on the VSC. |
