一种集中旁路型并联UPS的锁相方法

Focus Bypass Type Parallel UPS Phase Lock Method

为了解决集中旁路型并联UPS系统锁相控制复杂、精度不高的问题,根据理论分析和工程实际提出了一种二级锁相控制方法。详细分析了其调节精度和谐波特性,并通过实验证明,所提策略实现简单,可有效地提高并联UPS系统的同步控制精度,较好地抑制环流,保证了并联UPS系统的稳定运行。

In order to solve the problem that focused bypass type parallel UPS system phase-locked control complex,and low precision,according to the theory analysis and engineering conditions,this paper puts forward a second order phase locked control method and the control precision and harmonious wave characteristics are analyzed in detail.The experimental results show that the proposed method is simple and can effectively improve the synchronization control precision of parallel UPS system,which can restrain the circulation and ensure the stable operation of parallel UPS system.