16-11-2012, 02:34 PM
Wind-Diesel Hybrid System Options for Alaska
Wind-Diesel Hybrid System.pdf (Size: 598.35 KB / Downloads: 66)
• Basic Concept
A wind-diesel hybrid system combines wind turbine(s)
with diesel generator(s) to obtain a maximum
contribution by the intermittent wind resource while
providing continuous high quality electric power.
• Objectives
• Reduce system fossil fuel consumption
• Reduce diesel run time (high penetration systems only)
• Benefits
• Reduced system operating costs
• Reduced environmental impacts
Why Wind-Diesel?
Diesel:
• Large installed base of diesel power plants
• Lots of diesel operating experience
• Existing fuel and service infrastructure
• Relatively low capital cost compared to other dispatchable
generators
• Since the objective is to use the generator as little as
possible, it’s important to minimize its cost.
Low Penetration
• Lowest capital cost
• ($1,000-1,500/ kW wind capacity, excluding diesel plant)
• Easiest to integrate with existing diesel system
• No diesel plant modifications necessary
• Only modest fuel savings possible: up to ~20%
• Additional support requirements:
• Wind turbine maintenance
Review of Wind-Diesel Classes
Medium Penetration
• Higher capital cost
• ($1,500-2,500/ kW wind capacity, excluding diesel plant)
• Some diesel controls modifications necessary
• Automated diesel operation desirable
• Usually must install/integrate secondary loads
• Requires relatively simple supervisory control
• Greater fuel savings possible: up to ~40%
• Additional support requirements:
• Wind turbine maintenance
• Secondary load maintenance
• Basic control system troubleshooting
Conclusions
• Several distinct approaches to wind-diesel exist, each with
its own architecture
• Higher wind penetration means higher capital cost but
lower operating cost and greater fuel savings
• High penetration systems have greater complexity and
require greater technical sophistication
• Training and support infrastructure essential
• Given good wind resource and adequate project density,
high penetration wind-diesel systems can provide least life
cycle cost of electricity in remote communities.