A Yuchai 16VC 1500KW automated containerized diesel generator set was deployed in Nima County, Tibet, at an average altitude of about 5000 meters, as backup capacity for an ultra-high-altitude off-grid / solar-hybrid power supply.
1. Background: Nima County and Its Power Challenge
Nima County sits on the northern Tibetan Plateau at roughly 5000m - one of the highest continuously inhabited counties in the world. Like many Tibetan county seats it historically ran as a power "island": limited 10kV radial lines, no external grid feed, and a winter supply gap when hydro output falls. Local solar-plus-storage is the main supply, but in the coldest months storage alone cannot always cover the load, so a diesel backup is the final guarantee of lights staying on for thousands of residents.
2. Why One 1500KW Automated Container at 5000m
At 5000m, thin air cuts engine output and makes starting hard, so the set was altitude-de-rated and fitted with cold-start aids and a heated, sealed container. In automatic mode it spins up within seconds when the solar-storage system signals a shortfall, carrying the county's critical load through winter nights and cloudy spells - the "last line" that lets a renewable-led micro-grid serve a high-altitude town year-round.
3. Key Technical Specifications
· Engine: Yuchai 16VC, 16-cylinder V-type diesel
· Rated Power: 1500 kW
· Altitude rating: designed and de-rated for ~5000m operation
· Configuration: automated container, unattended auto-start on command
· Voltage: high-voltage direct connection
· Rated Speed: 1500 r/min
· Rated Frequency: 50 Hz
· Control: remote/automatic start, AVR voltage regulation, cold-climate package
4. Operational Value Since Commissioning
As a remote plateau location, the set runs without an operator on site - it monitors start commands and operates unattended. When renewables fall short in extreme winter cold or prolonged cloud, it guarantees supply for life-safety and heating loads, making the solar-diesel hybrid viable for a town at the roof of the world.
5. Frequently Asked Questions (FAQ)
Q: Does a diesel generator lose power at 5000m?
A: Yes - roughly 3% per 300m of altitude from loss of air density. The set is deliberately de-rated so its nameplate output holds under local conditions.
Q: Why diesel if the site is solar-powered?
A: Storage is sized for typical days; extreme winter cold and prolonged cloud can exceed it. Diesel backup guarantees supply for life-safety and heating loads when renewables fall short.
Q: Can it run unattended?
A: Yes - the automated container monitors start commands and runs without an operator on site, which is essential at remote plateau locations.