基于负荷估计的光柴独立微网频率优化控制  

Frequency Optimization Control for Isolated Photovoltaic-diesel Hybrid Microgrid Based on Load Estimation

作　　者：米阳[1] 王成山[2] 

机构地区：[1]上海电力学院电气工程学院,上海市杨浦区200090 [2]天津大学电气与自动化工程学院,天津市南开区300072

出　　处：《中国电机工程学报》2013年第34期115-121,19,共7页Proceedings of the CSEE

基　　金：国家重点基础研究发展计划项目(973计划)(2009CB 219700);国家自然科学基金项目(50837001);上海市教委重点学科建设项目(J51303)~~

摘　　要：针对光柴互补的独立型微网,利用设计的干扰观测器估计的负荷值,提出了新的微网频率优化控制策略。构造干扰观测器估计出微网中不断变化的负荷值,在光伏(photovoltaic,PV)系统采取最大功率跟踪(maximum power point tracking,MPPT)控制条件下,基于估计的负荷值和微网频率的变化,设计滑模补偿控制器,并将设计的滑模控制器应用到柴油发电系统的有功功率调节中。仿真结果表明,所提出的频率优化控制策略不仅能够保证光伏系统的最大功率输出,提高光伏能源利用率,同时可减小由于负荷变化和光伏输出功率波动引起的较大微网频率偏差,而且利用所设计控制算法调频可以减少储能设备的硬件投入,为微网的大规模建设节约成本。A new frequency optimization control method for the photovoltaic （PV）/diesel hybrid microgrid was proposed based on the disturbance observer. The disturbance observer was constructed to estimate the fluctuating load value in the microgrid. The PV system was tuned by maximum power point tracking （MPPT） control, and the sliding mode compensation controller was designed based on the estimated load value and the variation of microgrid frequency to tune the power of diesel generator system. The simulation results prove that the proposed optimization control method can assure the maximum power output of PV system, improve the utilization efficiency of PV energy, and reduce the frequency deviation induced by the load changes and the PV power fluctuation, and the energy storage device hardware investment are reduced by using the control method in the microgrid large-scale construction.

关 键 词：微网 光伏 频率优化 干扰观测器 滑模控制 

分 类 号：TM73[电气工程—电力系统及自动化]