低压交直流混合下的生态微电网网架结构优化设计

Optimal Design of Ecological Microgrid Structure under Low-Voltage AC/DC Mixing

随着低压交直流混合微电网技术的发展,微电网的结构与管理日益复杂化。为提高微电网的运行效率和环境适应性,提出一种微电网网架结构优化设计方案。该方案在分析现有微电网架构的基础上,结合3种优化原则,设计了低压交直流双母线生态微电网结构。实验结果显示,优化后的微电网结构在低压交流母线、低压直流母线、交直流换流器等关键组件上的可靠性系数均超过0.95,检测5种故障元件的耗时均在0.20 s以内,最低为0.05 s。由此可知,优化后的网架结构不仅能提升微电网的整体性能,而且可以为未来低压交直流混合生态微电网的设计与实施提供重要参考。

With the development of low-voltage AC/DC hybrid microgrid technology,the structure and management of microgrid are becoming more and more complicated.In order to improve the operation efficiency and environmental adaptability of microgrid,an optimal design scheme of microgrid grid structure is proposed.Based on the analysis of the existing microgrid architecture and 3 optimization principles,the low-voltage AC/DC dual-bus ecological microgrid architecture is designed.The experimental results show that the reliability coefficients of the optimized microgrid structure on the low-voltage AC bus,low-voltage DC bus,AC/DC converter and other key components are more than 0.95,and the detection time of the 5 fault components is less than 0.20 s,the lowest is 0.05 s.It can be seen that the network structure optimization studied not only improves the overall performance of the microgrid,but also provides an important reference for the design and implementation of the low-voltage AC/DC hybrid ecological microgrid in the future.