摘要
由于光伏阵列的I-V非线性特征,在光伏水泵系统中,驱动电机的控制方式、调节器参数及不同阵列工作点均会改变系统的传递函数结构和参数,进而影响光伏水泵系统的稳定运行。通过建立光伏水泵系统的小信号模型,详细分析系统在光伏阵列不同工作点条件下小信号模型参数的变化规律及稳定性,分别研究和对比V/F控制与矢量控制方式对系统稳定性的影响。理论分析和实验结果表明不同的控制方式对系统的稳定裕度影响差别较大,矢量控制具有快速的功率响应特性,可明显改善系统的稳定裕度。
The different control strategies of motor, parameters of regulator and the different operation status of PV array all influence the structure and parameters of system transfer functions for the non-linearity characteristics of the PV array, and then disturb the stability of solar pumping system. This paper analyzes the stability and the laws of the small signal model parameters changing on the different operation status of PV array, and compares the vector control strategy with the V/F control strategy. The experimental results showed that the different control strategies have the different influences on the stability of system and the vector control strategy possesses faster power response characteristics and improves the stability of system obviously.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2016年第9期2401-2407,共7页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(51207040
51307042)
关键词
光伏水泵
光伏阵列非线性
系统稳定性
V/F控制
矢量控制
photovoltaic water pump
the PV array non-linearity characteristics
system stability
V/F control
vector control
