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Abstract Based on the output characteristics of the photovoltaic (PV) cells, this paper analyzes the dynamic control process of PV simulator theoretically. Due to concluding that due to the nonlinear output characteristics, and it is difficult to simulate the whole PV I-U output curve by simply using pure voltage control or current control methods. Therefore a hybrid control strategy for the PV simulator is presented. By dividing the PV output curve into three segments, the proposed strategy implements hybrid current or voltage control via sampling, calculation and PWM output using a TMS320LF2407 DSP based control unit. A 2kW PV simulator prototype was built up in the lab, which could simulate the PV output characteristics under different irradiation, temperature and loads. The effectiveness and dynamic performance of the proposed hybrid control strategy was validated by tests using a grid-connected inverter and a variable resistive load respectively.
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Received: 25 October 2011
Published: 20 March 2014
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作者简介:李 媛 女, 1980年生, 博士, 讲师, 研究方向为可再生能源发电技术, 分布式电源接入和电力系统电力电子技术。 |
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2012, Vol. 27 
