VSG grid-forming solution for hydro, diesel, and solar power
Summary: VSG grid-forming solar-storage solution provides grid-formable green and reliable power supply for remote areas.
Solution Overview
In weak grid or isolated grid areas, grid-forming (VSG) PCS enables solar-plus-storage to provide voltage and frequency support to the system just like a synchronous machine.
Key Points
- VSG grid-forming: PCS emulates a synchronous machine
- Active voltage and frequency support for weak grids
- Enhances renewable energy hosting capacity and reduces disconnection
- Supports black start, enhancing resilience
Applicable Scenarios and Challenges
Remote areas relying solely on hydropower/diesel generators have low system inertia and unstable voltage and frequency; after renewable energy integration, they are prone to oscillation and disconnection.
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/off-grid switching, black start support.
- Battery Energy Storage System (BESS): Provides inertia and primary frequency regulation, smoothing fluctuations.
- Energy Management System (EMS): Coordinates hydro/diesel/solar/storage output to maintain system stability.
- Microgrid Power Switchgear (MPS): Grid-forming-class AC switchgear, integrating protection and synchronization.
Core Value
- Enhances system inertia and stability
- Renewable-friendly integration, reducing disconnection
- Reduces diesel generator start/stop and fuel consumption
- Supports black start, enhancing resilience
Typical Applications
Suitable for grid-forming power supply in mountainous small hydropower, border weak grids, and off-grid communities.
Delivery and Support
VGRID POWER provides integrated delivery from on-site assessment, system design, core equipment manufacturing (PCS/STS/BESS/MPS) to commissioning and remote O&M. Welcome to contact us for customized solutions and quotations.
FAQ
What is VSG grid-forming?
Virtual synchronous machine technology enables energy storage converters 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 devices are prone to instability; grid-forming can establish voltage and frequency independently, enhancing renewable energy hosting capacity.
What is the cost difference between VSG and conventional PCS?
VSG is a control strategy upgrade with similar hardware, offering high cost-effectiveness.
Can old hydro/diesel generator units be reused?
Yes, VSG can easily coordinate in parallel with existing hydro turbines and diesel engines.
