基于虚拟磁链的质子交换膜燃料电池并网控制系统研究

摘要

根据质子交换膜燃料电池(PEMFC)发电系统运行特性，建立 PEMFC 并网控制系统模型，设计基于 d 轴虚拟电网磁链定向的矢量控制策略(VFOC)和改进的虚拟电网磁链观测器。并通过采用 IEEE Std1547-2003标准，对并网电压、电流的总谐波畸变率(THD)进行仿真测试。结果表明，该 PEMFC 并网控制系统能够实现单位功率因数运行。而且通过 FFT 分析证明该并网系统也能够较好地降低电压和电流总谐波含量，验证了所设计并网系统的正确性和有效性。%According to the operating characteristics of a proton exchange membrane fuel cell (PEMFC) generation system, a PEMFC grid-connected control system model is developed and a virtual line-flux-linkage oriented vector control strategy (VFOC) based d-axis and a modified virtual flux-linkage observer are designed. The total harmonic distortion (THD) of grid-connected voltages and currents are measured by means of the criterion of IEEE Std1547-2003. The simulation results demonstrate that this PEMFC grid-connected control system can achieve unit power factor operation. Furthermore, the FFT analysis results testify that this grid-connected system can also decrease the total harmonic content of voltages and currents better, and then the correctness and validity of this proposed grid-connected control system is verified.