Study On United Optimal Operation Aid Decision System For Cascade Hydropower Plants

The thesis takes the establishment of united optimal operation aid decision system with web-based method for a basin cascade plants as the objective of this research. With the technologies of intelligence optimization and network information applied into the aspect of the basin cascade hydropower plants, such as information management, hydrological forecasting and optimal operation, a comparatively practical united optimal operating aid decision system of the basin cascade hydropower plants was developed. This system can carry on rational appraisal and optimal decision to the producing operation schemes, and offers theoretical foundation and technical support for the operation scheme of the basin cascade hydropower plants, which realized intelligence, informationization and network management.The main research contents and achievements of the thesis are as follows:(1) Aiming at the heterogeneous distribution characteristic of the time-space rainfall and the underground cushion condition in the basin, a classified forecasting method for putting the runoff into the reservoir was proposed. Through carrying on the time-space analysis to the gathered hydrology series, the wavelet neural network forecasting model corresponding to the characteristic value variable of the classified forecasting factor collect with the observed values was established, and the classified recognizer of model for according to the different runoff characteristic value searching automatically adapting network model to forecast was designed. Finally, inserted the classified forecasting model merges into mixed model to set up the united runoff forecasting model of the reservoir.(2) Studied systematically the building-model methods of the optimal operation model for the basin cascade hydropower plants preceded under the condition of market mechanism and a hydropower plant produced in the economical operation, and presented a set of efficient algorithm to solve the corresponding model. Among them, the solution of economical optimal operation model in a hydropower plant was applied in this text putting forwarded that the double-deck coupling algorithm which based on the improving genetic algorithm, where the upper-deck module was designed as to solve the load optimal distributing question among the cascade hydropower plants and the lower-deck module was designed as to solve the generator group optimal-uniting question among the generators in a hydropower plant. This algorithm has advantages in getting the optimal operation schemes of the load distribution, as well as the generator group unitization at the same time.(3) Established an optimal operation evaluation model of the basin cascade hydropower plants based on the theory of multi-objective fuzzy optimal selection. In this evaluation model that the scheme evaluation indicator is corresponding with the optimal operation object, the produced operation schemes was applied to the multi-objective fuzzy optimal selection method to proceed the orders, a number of the characteristic values was used to describe the merits of the operating results and the evaluation indicators including the introduction of Weight Evaluation Model. The evaluation model offers an advanced method to decide the optimal operation scheme of the basin cascade hydropower plants presented the reasoning mechanism derived by the weighted method, so as to guide the optimal operating model generating the actual optimal operating program.(4) Developed a united optimal operating aid decision system software with web-based method for the basin cascade hydropower plants. This system software was designed according to the theoretical method and technology mentioned above, combined the concrete optimal operating goals to deeply analyze the functional demands of the system, used the B/S network architecture model and the software layered service modes to build the systems overall framework and the various functional modules, also carried on the detailed explanation to the realization course of each module. Apply the developed system software to the realistic project that can provide perfect information data and the scientific operation scheme for policy-makers, and improve the comprehensive management level of information and the implement competence of operation automation for the enterprise.