Applying fractional order system to design coordinated control system in primary frequency and automatic generation control for large coal-fired units

The large coal-fired units should have the ability of primary frequency (PF) and automatic generation control (AGC) to meet the requirements of grid security. In this paper, coordinated control system (CCS) with fractional order control (FOC) is designed in PF and AGC for large coal-fired units. An implementation of fractional order PID (FOPID) controller in distributed control system (DCS) is proposed. The engineering application results show that the algorithm is easy to implement in engineering, which can overcome the large delay and inertia of the fuel system, and effectively improve the performance of PF and AGC. (paper)