Grid Support Battery Storage for Regulation
This project deployed a 20ft containerized BESS at a remote site. The system's Power Conversion System (PCS) is capable of operating in both VF (Voltage-Frequency) mode for islanded operation and PQ (Active-Reactive Power) mode when connected to the site's microgrid. The primary application is to provide fast frequency response to stabilize the grid against fluctuations caused by sudden load and conveyor starts/stops, while also performing daily peak shaving to reduce demand charges.
Location:Pilbara Region, Western Australia
System:20ft Container
Given the weak grid infrastructure and high penetration of site generation, the system employs a dual-mode control strategy:
Frequency Regulation (PQ Mode): The BESS continuously monitors grid frequency. It injects or absorbs power within milliseconds to arrest frequency deviations, providing essential stability services akin to inertia.
Peak Shaving (Scheduled Operation): The system discharges during predictable daily peak load periods (e.g., midday processing operations) to cap the site's power import from the central generator. It then recharges during off-peak, low-load hours.
System Topology & Advantages:
The system's advanced topology features a dual-purpose PCS that seamlessly transitions between grid-following (PQ) and grid-forming (VF) modes. This allows it to provide critical frequency regulation as a grid servant while connected, and instantly form a stable voltage source for priority loads during planned or unplanned islanding.
The key advantage lies in its multi-layered value proposition: the fast response capability stabilizes the entire site's power quality, reducing equipment tripping and wear, while the peak shaving function delivers direct and significant cost savings on energy bills. This combination of enhanced reliability and reduced operational expenditure makes the project highly economically viable.
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