Both Virtual synchronous generator (VSG) control and grid-forming converter are used to mimic the behaviour of synchronous machines. How to understand the relations between Grid-forming and VSG? Thank you for your comments!
The motivation for this discuss is that, as inevitable consequence of the global power system transition towards nearly 100% renewable-based generation is the loss of conventional bulk generation by synchronous machines, their inertia, and accompanying frequency and voltage control mechanisms. Such low-inertia system leads to critical challenges in system stability, the virtual synchronous generator (VSG) and so-called gridforming strategies are investigated for solving such low-inertia challenges.
I understand that grid forming inverters are a hot topic right now, but they only manage the energy supply, not the energy load. When the load energy (consumer side) is managed with low consumption fluctuation. The generator does not have to have much inertia. Therefore, if the inverter supports local energy fluctuations on both the generator side and the load side, the grid will be stable.
Hi Colleague
read this paper my help you:
Virtual Inertia-Based Inverters for Mitigating Frequency Instability in Grid-Connected Renewable Energy System: A Review
URL: https://www.mdpi.com/2076-3417/9/24/5300/pdf
Regards
Tadashi Morita Thank you Dr. Tadashi Morita for your comments!
" if the inverter supports local energy fluctuations on both the generator side and the load side, the grid will be stable ", this also means more inertia (active power) is required for the power generation system.
But for the future power grid, both traditional generators and power support inverters are key elements in providing the system-level inertia. It seems a challenge for inverters to provide system-level inertia, which requires huge rated power.
https://www.sciencedirect.com/science/article/abs/pii/S0142061516320725
The core of the VSG control is to mimic the inertia and damping characteristics of synchronous generator hereby improving the inverter response towards disturbance and contributing to the microgrid stability. Grid-forming inverters help in forming the microgrid frequency and voltage and could also follow PQ commands when working in grid-connected mode. VSG falls under the category of grid-forming inverters.
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