Hydropower and Diesel Generator VSG Grid-Forming Solution
Summary: VSG grid-forming solar-plus-storage solution, delivering grid-formable, reliable green power supply for remote areas.
Solution Overview
In weak-grid or islanded areas, grid-forming (VSG) PCS units enable solar-plus-storage to provide voltage and frequency support to the system just like synchronous machines.
Key Points
- VSG grid-forming: PCS emulates a synchronous machine
- Active voltage and frequency support in weak grids
- Higher renewable hosting capacity, fewer disconnections
- Black-start capable, enhanced resilience
Applicable Scenarios and Challenges
Remote areas relying solely on hydropower or diesel generation have low system inertia and unstable voltage and frequency; once renewables are connected, oscillation and disconnection become likely.
VGRID System Composition
- Power Conversion System (PCS): VSG grid-forming PCS, emulating synchronous machine inertia and actively supporting voltage and frequency.
- Static Transfer Switch (STS): Seamless grid-connected/islanded switching, black-start support.
- Battery Energy Storage System (BESS): Provides inertia and primary frequency regulation, smoothing fluctuations.
- Energy Management System (EMS): Coordinates hydropower/diesel/solar/storage output to maintain system stability.
- Microgrid AC Cabinet (MPS): Grid-forming-class AC cabinet with integrated protection and synchronization.
Core Value
- Improves system inertia and stability
- Renewable-friendly integration, fewer disconnections
- Reduces diesel generator start/stop cycles and fuel consumption
- Black-start capable, enhanced resilience
Typical Applications
Suitable for grid-forming power supply in mountainous small hydropower stations, border weak-grid areas and off-grid communities.
Delivery and Support
VGID POWER (VGRID) provides integrated delivery covering site assessment, system design, core equipment manufacturing (PCS/STS/BESS/MPS), commissioning and remote O&M. Contact us for customized solutions and quotations.
FAQ
What is VSG grid-forming?
Virtual synchronous machine technology enables the energy storage converter to emulate generator inertia and damping, actively supporting the grid rather than merely following it.
Why do weak grid areas need grid-forming?
Weak grids have low inertia, and grid-following equipment is prone to instability; grid-forming equipment can establish voltage and frequency on its own, improving renewable energy hosting capacity.
How much does VSG cost compared with a conventional PCS?
VSG is a control strategy upgrade with similar hardware, offering high cost-effectiveness.
Can old hydro or diesel generator sets be reused?
Yes, VSG can be easily paralleled and coordinated with existing hydro turbines and diesel engines.
