# Hydropower and Diesel Generator VSG Grid-Forming Solution 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. ## 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.