Ramping requirements and operation cost in a power system with dispersed wind generation

Operation of power systems with high wind penetration is significantly influenced by wind variability and uncertainty. This paper examines the potential impact of distributed wind generation on ramping requirements in the IEEE 24-bus system. Wind generation and load are modeled probabilistically using actual data and curve fitting. Probabilistic unit commitment (UC) based on unit de-commitment method and two-point estimate method is used to determine the ramping required to compensate for the wind power fluctuations and load uncertainty. The proposed method considers stochastic factors and their affects on the dispatch results. Different scenarios are studied to evaluate dispersed wind generation and its potential to reduce the ramping requirement and system operation cost. Ramping requirements of the system are calculated for 24 hours day ahead scheduling period and different wind penetration levels. A brief analysis is also carried out regarding the system operation cost and the potential reduction of this cost due to dispersed wind generation.