超导磁储能系统抑制风力发电功率波动的研究

Research on the application of superconducting magnetic energy storage unit to damp wind generation power fluctuating

建立含超导磁储能装置(SMES)的单机无穷大系统的Phillips-Heffron模型,导出含SMES电力系统总的电磁转矩表达式,从理论上分析SMES对增强系统阻尼的作用.并设计了SMES非线性比例积分微分控制器,数字仿真结果验证了SMES阻尼系统功率振荡的特性,同时表明该控制器具有较好的鲁棒性.

This paper introduces the application of superconducting magnetic energy storage （SMES） system in balancing power fluctuating to damp power system power oscillations between the distributed generation （DG） system and power grid. The SMES system is studied in the context of a single-machine infi- nite-bus （SMIB） power system. Tlae mathematical model of the SMIB power system including a SMES unit is established, and the Phillips-Heffron control structure of the power system is described. Based on the principle of the complex torque coefficient （CTC） method, the expression of the complex electromagnetic torque of the entire power system including the SMES unit is derived. A nonlinear Proportion-Inte- gral-Differential （PID） control strategy is proposed for the SMES system to enhance the power system damping. Simulation results demonstrate that the SMES is effective in damping the power system low-frequency oscillations and the proposed nonlinear PID controller is robust to regulate the SMES unit.