The purported social, economic and environmental benefits are resulting in increased wind penetration in existing power systems. However, due to inherent uncertainty of wind energy, thermal generators are expected to maintain security and reliability of power systems. Further, in view of the huge investments in existing power plant installations, thermal power may not be completely replaced by renewable energy sources such as wind power in near future. Therefore, reduction in capacity factor of the existing thermal generators due to wind integration is a major policy concern. This aspect must be juxtaposed with benefits of wind integration such as cost savings and emission reduction. The current study introduces a Capacity Factor Violation Index (CFVI) to evaluate the impact of wind integration on capacity factor of thermal generators. A distance metric comprising of cost savings, emission reduction, network losses and CFVI is proposed based on Compromise Programming (CP). Sensitivity analysis is performed by varying the wind penetration and turbine ratings and the impact on the distance metric is investigated. The proposed methodology is comprehensively demonstrated in eleven popular test power systems. (C) 2019 Elsevier Ltd. All rights reserved.