Coordinated control system modeling of supercritical unit based on improved firefly algorithm

Abstract

With the development of power industry, ultra-supercritical unit becomes main thermal power-generate unit. If we grasp the characteristics of the unit's coordinated control system, control quality of the whole system can be improved. Furthermore, the economy and safety of power generation can be increased. Firefly algorithm is an excellent optimization algorithm and is suitable for modeling. But there exist some problems in its application such as local extreme and low optimization precision. Be aimed at these problems, random search and some new variable coefficient strategy are designed to improve original algorithm. Simulation results show that the improved firefly algorithm has better performance in optimization precision, convergence speed and ability of eliminating local extreme. The improve algorithm is used to set up a three-input-three-output coupled coordinated control system's mathematic model. Results showed that these models have excellent similarity with actual objects.