Droop Control Strategy with a Novel Characteristic Model

Droop control strategy with a novel characteristic model is proposed in this paper. Using a communication line to control the parallel system, the flexibility of the system is limited and error can occur due to the external disturbance. The droop is the key function to control the parallel operating system. Conventional droop control model is generally based on the linear function. The reference value changes depending on the droop coefficient and power variation, and also the droop coefficient is related to the steady-state errors and dynamic response. Proposed droop characteristic model consists of the linear and quadratic functions. It can minimize the variation of the output reference in a specific power range and also improve the transient dynamic response. The proposed droop characteristic model is verified by the simulation result.