In order to solve the optimal problems of complex and gigantic hydro power system, a new global optimization method, named Triangle Gyration Algorithm (TGA) was proposed. It embodies the characteristics of simple structure, good robust and fast convergence. The individual of algorithm in every generation is guided by the best objective function value and transformed by the trigonometric function, which ensure the whole progress converge quickly at the global optimal points. Compared to the usual optimization methods with a numerical example and short term scheduling of a hydro plant, TGA manifests the better performance in running time and optimal results and it provides a profit 8.58% more than DP does. The algorithm has the catastrophe mechanism capable of preventing algorithm being trapped in local optimization, simple structure, and overcomes the blindness of random searching. Iteration mechanism and value selection of TGA manifests essential difference from other traditional optimal methods.
