Reliability Study of Power Generation System Utilizing Wind Power

Derek H. Geiger

DSES-6070 HV5 Term Project

31-March-2008

Power Generation Systems

Majority of power generated today provided by conventional energy sources

– Coal– Nuclear– Hydro– Fossil Fuels

Benefits: Provide reliable source of energy Drawbacks: Except for Hydro, limited supply of

resources and create pollution

Alternative Power Generation Systems

More and more implementation of alternative power generations systems (10% to 20%)

– Solar Power– Wind Power– Fuel Cell

Benefits: Clean, unlimited resources Drawbacks: Produce unpredictable time varying power

Reliability Project Objective

The goal of the project is to develop a simple reliability model for a power generation system to evaluation the benefits of alternative power sources

Model the following:– Reliability of power generation system or

‘network’ provided by a conventional power sources

– Reliability of wind farm– Reliability of hybrid power generation system

Reliability Model of Conventional Power Generation System

Conventional power plant modeled as:– Constant power source (providing max power)– Failure distribution is exponential– Repair rate is lognormal

Num Rated Power (MW)Failure Rate

(Failures/Year)Repair Time

(Hours)Repair Time STD (hours)

FORMTTF

(hours)

1 40 6 45 9 0.0299 14602 40 6 45 9 0.0299 14603 10 4 45 9 0.02013 21904 20 5 45 9 0.02504 17525 5 2 45 9 0.01017 43806 5 2 45 9 0.01017 43807 40 3 60 12 0.02013 29208 20 2.4 55 11 0.01484 36509 20 2.4 55 11 0.01484 3650

10 20 2.4 55 11 0.01484 365011 20 2.4 55 11 0.01484 3650

Power Required:175 MW

Allow PP:240 MW

Raptor Model of Power System

20 MW

10 MW

40 MW

Reliability Results of Power Generation System For 1 Year Period

Reliability Model of Wind Farm

Very simple model:– Each turbine produces 1 MW of constant power– Failure distribution is exponential

MTTF = 4380 hrs

– Repair rate is lognormal MDT = 45 hrs with a STD of 9 hrs

– Does not include Weibull wind distribution or non-linear power curve

– 22 turbines required to generate 20 MW of power

Raptor Model of Wind Farm

Reliability Results of Wind Farm for 1 Year Period

Reliability Model & Results of Hybrid Power Gen. System for 1 Year Period

Replace most unreliable 20 MW PP with Wind Farm

Conclusions

Simple models of conventional and wind farm power generation systems

Not considered in scope of project were time varying power generation considerations of wind power

Results showed that by adding in a wind farm to conventional power system increases system reliability considerably due to high system redundancy

20 MW System Only

20 MW with Wind Farm