Solar-Storage-Diesel AC/DC Coupled Microgrid Solution
Summary: An industrial and commercial AC/DC hybrid microgrid combining PV, diesel generators, energy storage and the grid, balancing economics and resilience.
Solution Overview
Designed for industrial and commercial parks that already have grid access but face significant fluctuations, this solution uses an AC/DC coupled architecture to flexibly integrate PV, diesel generators, energy storage and the main grid.
Key Points
- PV and batteries connect directly on the DC side, reducing conversion stages and improving efficiency
- Easy multi-port expansion
- Delivers both economics and resilience
- Phased retrofit without disrupting the existing distribution system
Applicable Scenarios and Challenges
A single grid-connected supply is affected by electricity prices and curtailment; a purely off-grid setup is costly. The goal is to balance economics with uninterrupted power resilience.
VGRID System Composition
- Power Conversion System (PCS): the core of AC/DC coupling, coordinating multiple sources in a unified manner.
- Static Transfer Switch (STS): seamless grid-connected/off-grid switching to protect critical loads.
- Battery Energy Storage System (BESS): multi-timescale support, enabling both arbitrage and backup power.
- Energy Management System (EMS): optimization based on electricity prices, load and carbon targets.
- Microgrid AC Cabinet (MPS): an AC/DC coupling cabinet with integrated multi-port capability.
Core Value
- Delivers both economics and resilience
- Multi-energy complementarity, maximizing green power
- Uninterrupted power for critical loads
- Can be built in phases according to the park's needs
Typical Applications
Suitable for industrial parks, bonded zones and industrial and commercial clusters requiring highly reliable power supply.
Delivery and Support
VGID POWER (VGRID) provides integrated delivery from site assessment, system design and core equipment manufacturing (PCS/STS/BESS/MPS) to commissioning and remote O&M. Please contact us for customized solutions and quotations.
FAQ
What is the difference between AC/DC coupling and pure AC coupling?
AC/DC coupling connects PV and batteries directly on the DC side, reducing conversion stages, improving efficiency, and facilitating multi-port expansion.
Is retrofitting an existing campus complicated?
MPS/PCS supports grid-connection point access nearby, enabling phased construction without affecting the existing power distribution.
What campus size is AC/DC coupling suitable for?
It suits commercial and industrial campuses from several hundred kW to several MW.
What is the role of diesel in a coupled system?
It serves as backup and peak shaving, with the EMS optimizing its minimum run time.
