超级电容器在光伏发电系统中的应用

Application of Super-Capacitors in Photovoltaic Power System

针对光伏发电模块输出电压不稳定问题,设计一种以超级电容器作为储能元件来改善光伏发电系统电能质量的并联型调节装置。在光伏发电系统正常运行条件下,该装置可以快速抑制光伏发电模块的电压波动,使得光伏发电模块只需向负载提供预先设定的单位功率因数的恒定有功功率;该装置还可以在光伏发电模块发生短时供电中断时充当UPS电源,短时间内向负载提供全部功率。仿真结果表明,该装置可以有效改善光伏发电模块输出电压,提高电能质量,增强负载用电的可靠性。

For photovoltaic（PV）module output voltage instability problems, a shunt power conditioning device which uses super-capacitor as a energy storage component to improve the quality of the PV power generation system is brought forward. In the normal operation condition of the PV power generation system, the device can quickly inhibit PV module voltage fluctuation, which make the PV power generation modules only need to provide pre-configured unit factor constant active power to load. The device can also be used as an UPS power supply to provide load full power in a short period of time when PV module short-term power interruption occurrs. Simulation results show that the device not only can effectively improve PV module output voltage and power quality, but also enhance the reliability of the electricity load.