Study On Load Frequency Control Of Interconnected Power System Study-based The Cloud Model Theory

The emergence of energy and environmental crisis makes the wind scaleexpands unceasingly. Because wind energy has strong randomness and intermittent,large-scale wind power connected to the grid will cause great influences on powergrid frequency. Load frequency control is a key means to maintain system frequencystable and tie-line power exchange value stable operation as planned. Therefore, thefurther study of new grid frequency control strategy to adapt to the change of thetraditional power grid to the large-scale wind power grid is an important researchfield of modern power grid frequency stability.According to the uncertainty problem of load frequency control system, anadaptive PI control method of load frequency control in multi-area interconnectedpower system based on cloud modeling theory was proposed in this paper. A cloudmodel PI controller was established for load frequency control, where the area controlerror amount e was regarded as the former of the cloud generator, the setting valuesΔP and ΔI of the PI controller were regarded as the consequent of the cloud generator.At the same time the load disturbances of different conditions were simulated byfrequency domain and time domain respectively, the load frequency control of powersystem was realized using the could model controller to regulate the parameters of PIcontroller. at the same time, the above method is respectively used for the loadfrequency control model of wind power and wind-energy storage power system, byimproving the cloud rules of PI controller. the simulation examples verify theeffectiveness of the proposed method, the control effect of the cloud PI controller issignificantly superior to the traditional PI controller.