Parameter optimization of load frequency control system composed of hydroelectric and thermal power units based on Levenberg-Marquardt algorithm

Aiming at the load frequency control (LFC) of water and fire generators, a PID control parameter optimization method for a hybrid electric power system based on the Levenberg-Marquardt (LM) algorithm is proposed. According to the situation of the hydro-thermal units controlled by the actual input load frequency of the power grid, the control model of the hybrid LFC system is constructed. Combined with the control performance evaluation index, the LM algorithm is used to optimize the PID parameters of the mixed LFC model. The actual calculation of the hydro-thermal power automatic generation control( AGC) units invested in the abundance and dry season is carried out. The results show that the method can optimize the PID parameters of the LFC system in real-time under different conditions of abundance and dry season, improve the control effect of LFC, and ensure the grid frequency. Quality provides a theoretical basis for the control parameter setting of the dispatcher LFC system.