多MPPT逆变器定功率输出控制策略

Active Power Control Strategy of Multi-Module Inverter System

为保证光伏发电系统更高效,更稳定,满足功率调度的快速响应要求,需要逆变器具有准确、稳定、快速的功率调度能力。本文介绍了三电平多路MPPT逆变器的基本原理,将多路MPPT有功功率定额输出控制器应用于该逆变器中。逆变器在光照快速变化过程中需要具有快速准确的功功率定额输出控制能力,对于多路具有差异的阵列需要实现功率自动分配,所设计控制策略简单易行。通过方针验证了本控制方法的准确性、可行性及优越性。

In order to ensure energy-efficient and stable operation of the entire PV system, and meet the fast response of active power control demand, the inverter should be requested with accurate, stable and fast active power control. This paper introduces the basic principles of the three-level multi-module inverter and applies an active power controller to the inverter control. First, the active power controller should keep fast and accurate control ability during the rapid changes in illlumination. Second, the active power controller should has automatic power apportioning between the different modules. Simulation shows that the active power control strategy of multi-module inverter is feasibility and superiority.