摘要
针对目前市面上缺乏可应用于光伏中央空调系统的DC/DC稳压设备,以及常规光伏空调存在的能量损耗较大、能量不能实时上网等问题,提出一种无DC/DC和DC/AC等传统变流环节的光伏直驱变频式离心机系统;在系统及其3个独立单元之间建立能量平衡关系,采用三元换流控制方法对3个独立单元进行联动控制,实现能量的双向流动及实时切换。通过仿真建模及系统试验,证明该系统方案的可行性以及控制方法的合理性。
According to the issues of lack of DC/DC regulator devices used for PV central air-conditioning system in the present market,large energy loss and energy flows failing to connect to grid in real time for the conventional PV air-conditioning system,a kind of frequency-variable centrifuge system driven by PV directly without DC/DC,DC/AC and other traditional converter modules is proposed.Between the system and its three separate units,a relationship of energy balance is established.Based on the balance,a ternary commutation control method is used for the linkage control of these three separate units,so that the bidirectional energy flow and real-time switching can be realized.Through simulation modeling and system test,the feasibility of the system solution and the rationality of the control method are verified.
出处
《制冷与空调》
2014年第12期17-22,72,共7页
Refrigeration and Air-Conditioning
关键词
光伏直驱变频式离心机系统
能量平衡
三元换流控制方法
frequency-variable centrifuge system driven by PV directly
energy balance
ternary commutation control method
