光伏发电双模式运行无缝切换控制策略研究
摘要：太阳能光伏发电系统有独立运行和并网运行两种工作模式,实现这两种工作模式的无缝切换,是双模式运行分布式电源发电并网技术的关键问题之一。在分析光伏发电系统特点的基础上,提出一种运行控制策略。该策略为对光伏电源的逆变器进行多环反馈控制,同时在并网过程中加入电压加权控制,离网过程中加入电流加权控制,抑制切换过程中并网电流和负载电压的冲击,波动在电力系统允许的范围之内。采用PSCAD/EMTDC软件对双模式运行光伏发电系统进行仿真分析,仿真结果表明,实现了双模式运行的无缝切换,验证了所提控制策略的有效性和可行性。
Abstract:Solar photovoltaic systems have independent and grid-connected operation modes, seamless switching between these two modes is one of the key issues of grid-connected techniques for DG generation system with dual-mode operation. A control strategy is proposed based on the analysis of PV system characteristics, in which multi-loop feedback control is taken for the inverter of photovoltaic generation, voltage weighted control is added in the grid-connected process, and the current weighted control is also added in the independent process. Therefore, it inhibits the impact of grid-connected current and the load voltage in the switching process, and makes their fluctuation within the permissible range. The PV generation system with dual-mode operation system is simulated and analyzed by using PSCAD/EMTDC software, and the results show that the seamless switching control is realized and the feasibility and effectiveness of the proposed control strategy are verified.
标题：光伏发电双模式运行无缝切换控制策略研究
英文标题：Research on Seamless Switching Control Strategy of PV Generation System With Dual-mode Operation
作者：晋鹏娟, 赵兴勇, 梁元元,
关键词：光伏发电, 独立运行, 并网运行, 无缝切换, 多环反馈控制,
发表日期：2014-04-09
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