Modeling and Analysis of Grid-Connected Large-Scale Photovoltaic Plants Considering the Delay Effects

被引：0
|
作者：
Liu, Jinhong [1 ]
Zhou, Lin [1 ]
Yu, Xirui [1 ]
Li, Bin [1 ]
Chen, Zheng [1 ]
机构：
[1] Chongqing Univ, Sch Elect Engn, Chongqing, Peoples R China
来源：
2016 IEEE 17TH WORKSHOP ON CONTROL AND MODELING FOR POWER ELECTRONICS (COMPEL) | 2016年
关键词：
digitally controlled system; LSPV system; time delay; capacity; stability; INVERTERS; DESIGN;
D O I：
10.1109/COMPEL.2016.7556712
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
Digitally controlled system has been widely used for the multi-inverter systems. However, the effects of time delay have not been fully studied in the grid-connected large-scale photovoltaic (LSPV) systems. To address this issue, this paper develops the general Norton model for grid-connected LSPV models by adding delay module into the inverter control system model. Meanwhile, based on the model of grid-connected LSPV system, the influence of time delay on the stability of system is analyzed by Nyquist diagram. Then the effects of the plant capacity on the system stability and stable range of the grid-connected LSPV plants are discussed and deduced by root locus. Finally, simulations are provided to validate the correctness of theoretical analysis.
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页数：7
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