Optimal Reservoir Operation Using Fuzzy Approach

Optimal reservoir operation model is developed using Multi Objective Fuzzy Linear Programming (MOFLP) which is computationally simple and easy to implement to the real world situation of reservoir operation. Application of MOFLP is demonstrated through the case study, Hirakud reservoir in Orissa State, India. Problem is formulated with two objective functions viz. maximization of releases for irrigation and maximization of hydro power produced, with several constraints and is solved in an iterative manner. Linear membership functions are used to fuzzify the objective functions. Only objectives are taken to be fuzzy and all other parameters of the model are considered crisp in nature. MOFLP is used to obtain a compromise solution simultaneously optimizing the fuzzified objectives and the level of satisfaction. For different satisfaction levels of both the objectives, MOFLP model is run to provide alternative scenarios to the decision maker. Optimal policies were also determined for various inflow scenarios using MOFLP. These optimal policies can be implemented by the reservoir authorities based on the qualitative prediction of inflows into the reservoir.