根据交直流混合微电网拓扑和并网运行特点,建立了接口换流器的数学模型,设计了基于滑模控制(sliding-mode con-trol, SMC)的接口换流器控制系统,并通过设计趋近律规定了滑模控制过程中系统在正常运动阶段的状态轨迹,保证滑模控制的品质。为证明控制系统在实际应用中的可行性,在dSPACE 1006 平台上建立了实验模型。仿真和实验结果表明,该控制系统可以提高接口换流器在不确定和非线性条件下的鲁棒性和快速响应性,保证微电网稳定运行。
This paper first analyzes the AC/DC hybrid microgrid operating characteristics and the mathematical model of the interface convertor according to the operation mode. Then it develops a control system for the interface convertor based on sliding-mode control (SMC). A reaching law is designed to ensure the performance of this control system. An experimental setup is developed based on dSPACE 1006. Simulation and experimental results illustrate that the control system is insensitive to parametric uncertainty or external disturbances. The fast dynamic response and robust control performance of the interface convertor can ensure the stable operation of the microgrid.
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