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Dual-mode control of multi-functional converter in solar PV system for small off-grid applications

机译:小型离网应用中太阳能光伏系统多功能转换器的双模式控制

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Solar PV system for off-grid applications is growing at a faster rate because of its compatibility and ease of implementation. The modern smart building consists of hybrid AC and DC loads. The solar PV system generates DC power and can also supply the DC loads. To supply the AC loads, the DC power need conversion to AC using a DC-AC converter. A general solar PV system consists of two stages, one is to extract the maximum power and the other one is to convert it into a suitable DC or AC. Here, a single-stage multi-functional converter (MFC) is employed, which extracts maximum power and supplies to both AC and DC loads. To overcome the intermittency of solar PV output, battery energy storage is interfaced through a non-isolated buck-boost converter. The MFC operates in two modes, i.e. hybrid power flow mode and inverter mode, depending upon the availability of solar PV output. The proposed system is simulated using the PSCAD/EMTDC software. An experimental test setup using solar array simulator and a multifunctional power electronics converter has been developed for demonstration of the results. The control algorithms are implemented using NI PXI-7842R series FPGA controller through LabVIEW platform.
机译:离网应用的太阳能光伏系统因其兼容性和易于实施而正在以更快的速度增长。现代化的智能建筑由交流和直流混合负载组成。太阳能光伏系统产生直流电,也可以提供直流负载。为了提供交流负载,需要使用DC-AC转换器将直流电转换为交流电。普通的太阳能光伏系统包括两个阶段,一个阶段是提取最大功率,另一阶段是将其转换为合适的DC或AC。此处,采用了单级多功能转换器(MFC),该转换器可提取最大功率并提供给AC和DC负载。为了克服太阳能光伏输出的间歇性,电池能量存储通过一个非隔离的降压-升压转换器进行接口。 MFC根据太阳能光伏输出的可用性以两种模式运行,即混合潮流模式和逆变器模式。所提出的系统是使用PSCAD / EMTDC软件进行仿真的。已经开发了使用太阳能电池阵列模拟器和多功能电力电子转换器的实验测试装置,以演示结果。控制算法是通过LabVIEW平台使用NI PXI-7842R系列FPGA控制器实现的。

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