Virtual Synchronous Generator Control of VSC-HVDC System Based on MMC of Hybrid Topology

Figure 5

Active power step response by conventional dual closed-loop control and VSG control used for hybrid topology. (a) Waveforms of DC voltage. (b) Waveforms of DC. (c) Waveforms of active power. (d) Grid synchronization angular velocity calculated by PLL and active power controller based on VSG. (e) Difference of synchronized angular velocity between grid and output of VSG control module and phase of valve side voltage. (f) Tracking the reference values of dq-axis inner current loop.

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