Current mobile power supply models
EVNHCM has researched and deployed in service various flexible power supply models using mobile generators (81 units), mobile transformers (65 units), and mobile UPSs (05 units).
Mobile power supply models
The power supply model using mobile generators can serve as a temporary power supply in place of substations under routine replacement, repair and maintenance, and supplement capacity for overloaded grid segments or areas under system upgrade, etc.
Image 1: A mobile transformer
The power supply model using mobile transformers can serve as backup power sources, provide temporary power for areas under grid malfunctions.
Image 2: A mobile generator
The power supply model using mobile UPSs can provide stable, continuous power for important events with large loads from visual-audio and lighting equipment.
Image 3: A mobile UPS
Research, develop and utilize mobile power supply models:
EVNHCM has researched continuously to improve and enhance power supply models to meet the current increasing demands.
Specifically:
a. Enhance 400kVA – 560kVA mobile transformers to higher capacities of up to 1,000kVA and use them in combination with integrated Ring Main Units (RMUs) to monitor the 22kV side, expected to be completed in Q3/2022.
b. Research and apply the vehicle-mounted mobile generator model
In Singapore and Thailand, the vehicle-mounted mobile generator model has proved its effectiveness. After research, EVNHCM concluded that the model is suitable for use in the context of HCMC.
The vehicle-mounted mobile generator model includes a power generator system (integrated with a synchronizing feature) installed on a trailer, container, or truck (“Synchronous generator vehicle”).
Synchronous generator vehicles can switch loads from the grid to the mobile source without causing an outage.
Additionally, the model can deploy ATS (Automatic Transfer Switch) units to form the backup power source for crucial loads.
Currently, the Corporation is working with experienced domestic suppliers that are capable of manufacturing these generator vehicles.
A pilot run of 01 synchronous generator vehicle is scheduled in Q3/2022 for trial and evaluation before expanded deployment in the future.
c) Deploy the Field Work Management app to optimize the management of mobile equipment quantity, type, location, and availability on the Geographic Information Systems (GIS) map.
By applying the vehicle-mounted mobile generator model, EVNHCM has taken an important step further in ensuring a stable and continuous power supply with higher reliability and improving customers’ satisfaction in using the utility’s services.