Wind Turbine Characteristic Of Energy Storge Hydraulic Wind Turbine And Intelligent Control Of Active Power

Wind energy,as a clean and renewable energy,is an important support for our energy transformation.However,the natural wind is random and intermittent,and the internal parameters of the wind turbine system are easy to change.In order to increase the proportion of wind turbines in the power system,it is urgent to clarify the output characteristics of wind turbines and improve the active power control performance of wind turbines under internal and external disturbances.In this paper,the working principle,control requirements and difficulties of energy storage hydraulic wind turbine are analyzed.The mathematical modeling and the state space equation of each part is established to facilitate the characteristic analysis and control implementation.Wind turbine is a key component of energy conversion.In order to obtain accurate control instruction of active power control system,the characteristics of AH-30 k W wind turbine are studied.It is found that the blade material has little influence on the operation characteristics of small and medium-sized wind turbines,which can be ignored.The output torque of wind turbine fluctuates greatly under the influence of wind,and tremors also exist.It is necessary to consider the influence of multi-source disturbance on the control performance of wind turbine.The error of wind turbine torque model modified by combining experiment and simulation is 5.6%,which provides an instruction model for active power control.The grid-connected speed control is the premise of the active power control of the unit.The grid-connected process can be realized after a short control,so there is no need to pay attention to the influence of internal variables on the control performance.The combination of fuzzy algorithm and traditional control is proposed to control the speed of grid connection.The system model is simplified and stability is analyzed to determine the range of traditional PID control parameters.Fuzzy control is added to carry out online active PID parameter adjustment and realize intelligent control of grid-connected speed of unit.It provides basic conditions for active power control.To control the active power of the system under internal and external disturbance,the generation of the unit is regarded as a long-term process.The internal variables in this process have great influence on the control performance,so it is necessary to observe them.A sliding mode controller combined with RBF neural network is proposed to control the active power to recognize and compensate the internal and external disturbances.Energy storage subsystem is introduced to assist the main drive system to control the active power quickly and accurately,realizing the intelligent control of the unit’s active power.The experimental platform of 30 k W hydraulic wind turbine is built.The feasibility and rationality of the active control strategy of grid-connected speed and active power under multi-source disturbance are verified.