Bi-objective Planning Of Wind-diesel Generating System Based On Cost-benefit Analysis

Under the decline of conventional source of energy and increasing pollution, the fossil fuel based energy structure is being replaced by renewable energy based structure. Wind generation is one of the most prospective renewable energy. As wind-diesel generating system can supply stable and reliable electric power to remote areas, it has become an important research direction in the field of wind energy. So this paper selects generation expansion planning of wind-diesel generating system as a research topic which is of profound theoretical and practical significance.According to wind speed probability distribution, this paper proposes a probability model of wind turbine generator and an outage model of generator based on non-sequential Monte-Carlo simulation method, then the technical and economic indices of system operation are computed by probabilistic production simulation to lay a theoretical foundation for making planning scheme. Meanwhile, according to the theoretical basis of cost-benefit analysis method, this paper analyses its application significance for wind-diesel generating system planning, and presents a bi-objective expansion planning model for generating system using minimum investment cost objective and minimum outage cost objective. On this basis, the proposed model is transformed into single-objective model using maximum public satisfaction index objective by introducing fuzzy satisfaction index, and the single-objective model is solved by genetic algorithm for the optimum planning scheme.Simulations results of the example system indicate that the proposed method for expansion planning of wind-diesel generating system is effective, and the optimum planning scheme not only coordinates synthetically the relationship between economy and reliability, but also achieves a proper balance of the benefit between power supplier and power user. Therefore, it adapts to the development of modern power system.