飞轮储能系统的直接转矩空间矢量控制研究

传统飞轮储能采用两套系统实现能量转换,储能用途单一。提出一种基于矩阵变换器的飞轮储能系统直接转矩空间矢量控制方案,可实现能量的双向流动。飞轮电机定子磁链及转矩是通过两个PI控制器控制,经过空间矢量调制模式将两相旋转的d-q坐标系上的两个电压分量转换到两相静止的α-β坐标系上;也能够对矩阵变换器输出的电压矢量及输入的电流矢量完全控制。最后通过Matlab/Simulink软件建立基于矩阵变换器的飞轮储能仿真模型,仿真结果表明负载输出相电流具有良好的正弦性及输出线电压具有较好交变性;验证了该方案的正确性和可行性。

Research on Direct Torque Space Vector Modulation Control of Flywheel Energy Storage System

Traditional flywheel energy storage uses two sets of system to realize the energy conversion but it can only be used as a single energy storage purposes.A kind of direct torque space vector control scheme based on matrix converter is proposed in the paper.It has the advantages of two-way flow of energy.The stator flux and torque of motor are directly controlled by two PI controllers.Space vector modulation mode includes two parts,one is to transform two voltage components from the d-q rotating coordinate system to theα-βstationary coordinate system though changing the flux of angular displacement;the other one enables the output voltage vector and the input current vector of matrix converter to be thoroughly controlled.At last,the simulation model of flywheel storage system based on matrix converter is established by Matlab/Simulink software.The simulation results show that the load output phase current has a prefect waveform and the output line voltage has an alternating characteristic,and then the correctness and feasibility of the proposed scheme are verified.