一种N+1模块化光伏并网发电系统设计

设计了一种N+1模块式高效率的光伏并网发电系统。整个系统由N+1个功率模块组成。系统采用DSP280X实现空间矢量控制策略、最大功率点跟踪、防孤岛检测等功能。对系统的数字控制原理和模块投入/退出控制方案进行了详细的原理分析,介绍了系统各部分的硬件设计和软件设计流程。最后给出了实验分析结果和各种实验波形,证明N+1模块式设计可提高系统对太阳能的转换,该装置具有较好的实时性、实用性和可靠性。

A New Design of Grid-connected Photovoltaic System with N+1 Modular Structure

This paper reports a new design of grid-connected PV system with a high-efficiency N+1 modular structure.The entire system consists of N+1 power module.The system can achieve the function of space vector control strategy,maximum power point tracking and anti-islanding features by the use of DSP280X.The principle of digital control and the modules into/out control in the system are analyzed in detail.This paper introduces the hardware design and software design process of the system.The experimental results and the various experimental waveforms are given finally,which confirm that the system can improve the realization of solar energy conversion,and also prove that the device has good real-time performance,practicality and reliability.