摘要
传统的单相单级光伏并网系统普遍存在二次功率扰动问题,会对光伏阵列的输出功率造成不利影响。基于对二次功率扰动的详细分析,在传统的并网逆变器结构上增加二次功率解耦电路,并给出该改进电路的系统控制策略。分析证明,该新型逆变器拓扑能有效降低二次功率扰动,抑制直流电压的二次纹波分量,进而提高能量利用效率,改善并网电流质量。仿真和实验验证该新型逆变器拓扑及其控制策略的合理性和有效性。
The secondary power disturbances of conventional single-phase single-stage PV power systems affect output power of PV array adversely. Based on detailed analysis of the secondary power disturbances in the traditional on-grid inverter, a secondary power decoupling circuit was added to the structure of the on-grid inverter, and the system control strategy with the improved circuit was given. The analysis showed that the improved circuit can effectively reduce the secondary power disturbance, and inhibit the secondary I）C voltage ripple component; thereby the capacity utilization efficiency and the quality of the grid current are improved. The simulation and experimental results verify that the improved circuit and control strategy are reasonable and effective.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2015年第10期2335-2340,共6页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(61104047)
湖南省教育部高等学校博士学科点专项科研基金新教师项目(20100162120014)
关键词
光伏阵列
单相逆变器
二次功率扰动
功率解耦电路
PV array
single-phase inverter
secondary power disturbance
power decoupling circuit
