基于电气外特性的光伏发电系统模型等效方法

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Abstract The model of the photovoltaic power generation system is complex, and it requires multiple iterations in calculation, which is not available for simulation analysis and calculation when a large number of PV power connected to the grid. This paper presents an equivalent method for PV system model based on electric external characteristic. Based on the analysis of steady-state and transient characteristics of photovoltaic power generation systems, the dynamic model is equivalent to a controlled voltage source circuit model with a second order dynamic characteristic. It only need to use the light intensity, temperature, and the fault information as input, and calculate the steady-state output current before and after the fault. After determining its relevant parameters, the modeling is completed, which is no longer required iterations at the time of simulation. Based on Matlab/Simulink platform the model of PV grid-connected systems is set up. Simulation results show that using the equivalent model to simulate, on the premise of guarantee the accuracy it can improve the efficiency of the simulation, and has the good engineering practical value.

Key words： Photovoltaic systems dynamic model equivalent modeling electrical external characteristics

Received: 08 January 2014 Published: 05 November 2014

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TM615

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	Articles by authors
	Liu Xingjie
	Guo Dong
	Wang Kailong

Cite this article:

Liu Xingjie,Guo Dong,Wang Kailong. Equivalent Modeling Method for PV System Based on Its Electric External Characteristics[J]. Transactions of China Electrotechnical Society, 2014, 29(10): 231-238.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2014/V29/I10/231

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