单相单级光伏系统的二次功率扰动抑制策略

发布时间：2018-07-07 12:13

本文选题：二次功率扰动 + 二次纹波电压　；参考：《仪器仪表学报》2014年02期

【摘要】：传统单相单级光伏逆变器的二次功率扰动问题对光伏阵列的输出功率和逆变器的输出电能质量造成不利影响,在深入分析二次功率扰动的基础上,提出了基于二次功率解耦电路的新型逆变器拓扑结构,该拓扑通过增加一个控制自由度,将直流侧电容中的二次功率转移至电感元件。针对该新型逆变器的拓扑特点,构造出相应的调制方法及控制策略。分析证明,该新型单相单级逆变器能有效抑制二次功率扰动,进而抑制直流电压的二次纹波分量,提高光伏系统的效率和并网电流质量。仿真与实验结果验证了该新型逆变器拓扑结构及控制策略的合理性和有效性。
[Abstract]:The secondary power disturbance problem of single-phase single-stage photovoltaic inverter has adverse effects on the output power of photovoltaic array and the output power quality of inverter. A novel inverter topology based on secondary power decoupling circuit is proposed. By adding a control degree of freedom, the secondary power in the DC side capacitance is transferred to the inductance element. According to the topology characteristics of the new inverter, the corresponding modulation method and control strategy are constructed. It is proved that the new single-phase single-stage inverter can effectively suppress the secondary power disturbance and further suppress the secondary ripple component of DC voltage and improve the efficiency of photovoltaic system and the quality of grid-connected current. Simulation and experimental results verify the rationality and effectiveness of the new inverter topology and control strategy.
【作者单位】：中南大学信息科学与工程学院;河南省电力勘测设计院;
【基金】：国家自然科学基金(61104047) 湖南省研究生自主探索创新基金(2013zzts227) 中央高校科研业务基金青年教师助推项目(2011QNZT028)资助
【分类号】：TM615.2

【参考文献】