基于燃料电池的电能质量控制器设计

为从负载侧解决电能质量问题,本文提出了一种电能质量控制器.该装置将统一电能质量控制器与燃料电池结合,力图扩展统一电能质量控制器的补偿范围.该拓扑结构有利于装置的小型化,供能的多元化以及电网的绿化.燃料电池与超级电容结合的三端双向变换器用以维持直流侧电容电压的稳定.针对系统电压畸变且含多重零点,设计了一种简单实用的参考电压电流检测方法.依据参考信号对串并联逆变器分别采用双积分控制与单周电流控制,使输出补偿电压电流快速精确跟踪参考信号.单周电流控制主要由比较器和RS触发器构成,其输出驱动信号的频率固定,有利于无源滤波器设计及实际应用.仿真结果验证了该装置设计的合理性、可靠性及有效性.

Design of fuel cell based power quality control device

To solve the power pollution in load side,a novel device named power quality control device (PQCD) is presented. This device combined the unified power quality conditioner (UPQC) with the fuel cell to enhance the compensation scope of the UPQC and this topology was beneficial to the miniaturization of the device,the diversification of power supply and power grid greening. The three port bidirectional converter combining the fuel cell with a supercapacitor was utilized to maintain the DC-link capacitor voltage. To deal with the distorted system voltage with multiple zero crossings,a simple and practical harmonic detection method was designed. Based on the detected reference signals,the double integration control and one cycle current control were applied to rapidly and precisely track the voltage and current references,respectively. The one cycle current control mainly contained a comparator and a RS flip-flop and the frequency of the output signal was constant,therefore it is beneficial to the design of the passive filter and practical application. The simulation results illustrate the reasonableness,effectiveness and reliability of the power quality control device' s design.