AN Bin, GONG Mao-fa, SU Yan-ping, WANG Zhi-wen, LI Lan-bing
（College of Electrical Engineering and Automation, Shandong University of Science and Technology, Qingdao 266590, China）
Abstract： The photovoltaic cell can achieve the optimal state, and the solar energy is converted into electrical energy sufficiently in the two-level PV power system by using the method of MPPT which is based on the front stage Boost converter. The back stage network side inverter adopts the method of deadbeat control and the grid power factor turns to be 1. The maximum power point tracking is realized， and the grid current has the same frequency and phase with the grid voltage through simulation. Therefore, efficiency of the solar module is improved and the sine AC wave of the inverter control circuit is high-quality. Each converter can achieve relatively independent function in the two-level PV power system by the method of Matlab/Simulink software simulation. The simulation shows that it is very conducive to the modular design and integration of the system.
Key words： photovoltaic; MPPT; deadbeat control; simulation
CLD number： TM615 Document code： A
Article ID： 1674-8042(2014)02-0093-05 doi： 10.3969/j.issn.1674-8042.2014.02.019
References
[1] ZHANG Xing, CAO Ren-xian. Solar photovoltaic power generation and inverter control. Beijing: China Machine Press, 2010.
[2] LIU Bang-yin, DUAN Shan-xu, LIU Fei. Photovoltaic array maximum power point tracking based on improved perturbation and observation method. Transactions of China Electrotechnical Society, 2009, 24(6): 91-94.
[3] JI Juan-zao, ZHOU Wei, XIAO Qiang. Maximum power point tracking of photovoltaic array based on improved perturb and observe algorithm. Power Electronics, 2012, 46(8): 29-31.
[4] CHENG Jun-zhao, WU Xi-ke, ZUO Wen-xia. Boost-based two-level grid-connected photovoltaic inverter system. High Voltage Engineering, 2009, 35(8): 2048-2051.
[5] ZHANG Chao, WANG Zhang-quan, JIANG Yan-jun, et al. Implementation of a deadbeat current controller for photovoltaic grid-connected inverters. Power Electronics, 2007, 41(7): 3-5.
[6] YAN Hong-lin, GONG Mao-fa, WANG Jing-jing. Research and simulation of single-phase photovoltaic grid-connected inverter deadbeat control. Electronics Quality, 2012, (9): 12-14.
[7] WANG Fei, XIE Lei, ZHOU Yi-ren. Realization and research on control strategy of single phase photovoltaic grid-connected inverter. Power Electronics, 2009, 43(11): 24-25, 40.
[8] LIU Sheng-rong. Design and development of PV inverter based on digital signal processor. Guangzhou: South China University of Technology, 2010.
[9] ZHAN Xiong, LU Jia-ling, ZHOU Ying-ying. Study on deadbeat control method used to single-phase inverters. Power Supply Technologies and Applications, 2003, 6(10): 524-526.
[10] TANG Li-li, ZHENG Qiong-lin. Research on main circuit parameters selection of single-phase pwm rectifier. Journal of Northern Jiaotong University, 2000, 24(4): 98-102.
两级式光伏并网发电系统的研究与仿真
安彬， 公茂法， 苏彦平， 王志文， 李岚冰
(山东科技大学 电气与自动化工程学院， 山东 青岛 266590)
摘要:在两级式光伏发电系统中， 采用基于前级Boost变换器的MPPT方法， 可以使光伏电池达到最优状态， 即最大限度的将太阳能转化为电能。 后级网侧逆变器采用无差拍控制， 使电网功率因数为1。 通过两级式并网发电系统的仿真， 可以实现最大功率点的跟踪， 而且使并网电流与电网电压达到同频同相。 因此， 光伏模块的效率能够得到提高， 逆变控制器的电流呈现高质量的正弦交流波形。 通过Matlab/Simulink软件进行仿真， 前后级都能实现相对独立的功能。仿真结果表明： 此方案更有利于系统的模块化设计和集成。
关键词:光伏； MPPT； 无差拍控制； 仿真
引用格式：AN Bin, GONG Mao-fa, SU Yan-ping, et al. Research and simulation of two-level grid-connected photovoltaic inverter system. Journal of Measurement Science and Instrumentation, 2014, 5(2): 93-97. [doi: 10.3969/j.issn.1674-8042.2014.02.019]
[full text view]
