基于超级电容储能的SiC器件变流器性能分析

超级电容储能系统的促进功率响应能力优势是改善分布式发电电源的电能输出效率的有效方式，为此利用SiC器件设计SiC MOSFET典型等效开关模型，并将其应用到超级电容储能系统中，进一步提升系统单位能量的传输能力。基于超级电容器工作原理，建立超级电容储能系统数学模型，有效分析基于超级电容储能的SiC器件变流器性能。经仿真验证，超级电容器可准确响应功率由负到正的变化；随着传输功率的逐渐增大，基于超级电容储能的SiC器件变流器传输效率也呈现上升趋势，在功率接近储能系统变流器额定功率时，变流器效率逐步稳定，运行效率在98%左右；响应速度较快，输出电压波动以及输出功率的波动幅度较小，具备较强的输出抗干扰性；达到电压稳定输出的时间较短，且超调量较低。

Performance Analysis of SiC Device Converter Based on Super Capacitor Energy Storage

The advantage of a super capacitor energy storage system in promoting the power response is an effective way to improve the power output efficiency of distributed generations. In this context, the typical equivalent switch model of SiC MOSFET is designed using SiC devices, which is applied to the super capacitor energy storage system to further improve the transmission capacity of unit energy of the system. Based on the working principle of the super capacitor, a mathematical model of the super capacitor energy storage system is established, and the performance of a SiC device converter based on super capacitor energy storage is effectively analyzed. Simulation results show that the super capacitor can accurately respond to the power changing from negative to positive. With the increase of transmission power, the transmission efficiency of the SiC device converter based on super capacitor energy storage also shows an upward trend. When power is close to the rated value of the converter in the energy storage system, the efficiency of the converter gradually becomes stable and the operation efficiency is about 98%. The response speed is fast, and the fluctuation ranges of output voltage and output power are small, indicating a strong output anti-interference. In addition, the output time of voltage stabilization is short, and the overshoot is low.