Title :
Reliability evaluation of a wind-diesel-battery hybrid power system
Author :
Liu, Xu ; Islam, S. ; Chowdhury, A.A. ; Koval, D.O.
Author_Institution :
Dept. of Electr. & Comput. Eng., Curtin Univ. of Technol., Perth, WA
Abstract :
The paper presents a novel analytical approach of reliability evaluation for wind-diesel hybrid power system with battery bank for power supply in remote areas. The proposed approach is developed on the basis of the discrete wind speed frame analysis of the Weibull wind speed distribution. By employing wind speed frame analysis, an analytical model of wind-diesel hybrid system is developed that deals with system outage as a result of component failure and wind speed fluctuation. This model computes power output of wind turbine generators for each discrete wind speed frame, which is created by splitting the Weibull wind speed distribution curve. Then a model of battery bank is combined with that of the wind-diesel system. The reliability analysis of the overall system is conducted by combining power outputs of the wind and diesel generation units with battery throughout all wind speed frames to obtain the reliability indices, Loss of Load Probability (LOLP) and Expected Energy Not Supplied (EENS), which reflect a long term performance of the hybrid power system. By employing the wind speed frame the intermittent characteristics of wind speed and turbine failure can be easily taken into account. Simultaneously the modeling process can be greatly simplified and the calculation time can be saved as well. This model is suitable for system reliability assessment for both system planning and system optimization.
Keywords :
battery storage plants; diesel-electric power stations; hybrid power systems; power generation planning; power generation reliability; turbogenerators; wind power plants; wind turbines; Weibull wind speed distribution; battery bank; diesel generation units; discrete wind speed frame analysis; expected energy not supplied; loss of load probability; power supply; reliability evaluation; system optimization; system reliability assessment; wind turbine generators; wind-diesel-battery hybrid power system; Batteries; Failure analysis; Hybrid power systems; Power generation; Power supplies; Power system modeling; Power system reliability; Wind energy generation; Wind speed; Wind turbines; Power system reliability evaluation; wind turbine generator; wind-diesel hybrid power system with battery bank;
Conference_Titel :
Industrial and Commercial Power Systems Technical Conference, 2008. ICPS 2008. IEEE/IAS
Conference_Location :
Clearwater Beach, FL
Print_ISBN :
978-1-4244-2093-3
Electronic_ISBN :
978-1-4244-2094-0
DOI :
10.1109/ICPS.2008.4606290