# VSG grid-forming solution for hydro, diesel, and solar power 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. ## 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.