光伏智能微电网的电压频率分层控制策略

摘要

This paper introduced a 500kW hierarchical-controlled photovoltaic smart microgrid based on a photovoltaic roof power generation system of an enterprise in Guangdong.A hierarchical control with droop control is adopted after comparing and analyzing the control schemes of micro-grid.The proposed secondary voltage/frequency control with weigh factor based on multiple nodes and pre-synchronization control schemes were illustrated as well.With the presented hierarchical control strategy,a recovery of the voltage and frequency in the islanded mode and a smooth switching between two operation modes were achieved.The experimental results validated the proposed scheme.%介绍了依托广东某企业的光伏屋顶发电平台所建立的500 kW光伏智能微电网系统.通过对比分析现有微电网控制方案,确定了基于下垂控制的分层控制方案.提出了含权重因子的多节点二次电压频率调整及预同步控制的实现方案.实现了孤岛运行条件下电压与频率的恢复以及并离网模式的平滑切换.试验结果验证了所提方案的正确性.