Design of P-f and Q-V droop controller in micro-grid

The invention provides a P-f and Q-V droop controller in a micro-grid. Particularly, the micro-grid is a single closed loop feedback system, when DSP chips are utilized to design the droop controller, a droop control module is built on the basis of the principle of the droop controller, the sizes of P and Q are determined by the system and loads, a saturation module is additionally arranged, and then the system has certain anti-jamming capacity for faults or small perturbation. The saturation module is used for determining the fluctuation range of input signals, if the input signals are within the fluctuation range, the input signals are normally output, and if the input signals exceed the range, an upper limit or a lower limit is output. According to the P-f and Q-V droop controller, the voltage and the frequency of the system can be effectively controlled to be within a certain range, the utilization rate of electric energy is increased, and the purpose of protecting safety of electric equipment is achieved, and meanwhile the P-f and Q-V droop controller is simple in structure and high in operability.