Design optimization of transformerless grid-connected PV inverters including reliability
Design optimization of transformerless grid-connected PV inverters including reliability
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DOI：
10.1109/tpel.2012.2198670
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发表时间：
2012-05
期刊：
影响因子：
--
通讯作者：
E. Koutroulis;F. Blaabjerg
中科院分区：
文献类型：
--
作者：
E. Koutroulis;F. Blaabjerg
本文提出了一种新的无变压器光伏逆变器优化设计方法，以实现光伏并网系统的经济高效部署。计算光伏逆变器组件的最优值和类型，使光伏逆变器在光伏系统生命周期内产生的LCOE （Levelized Cost of The Electricity）最小。LCOE的计算还考虑了组件的故障率，故障率会影响光伏逆变器的可靠性性能和全寿命维护成本。设计实例表明，与未优化的光伏逆变器结构相比，使用所提出的优化方法设计的光伏逆变器具有更低的总制造成本和生命周期维护成本，并向电网注入更多能量，从而最小化LCOE。
This paper presents a new methodology for optimal design of transformerless Photovoltaic (PV) inverters targeting a cost-effective deployment of grid-connected PV systems. The optimal values and types of the PV inverter components are calculated such that the PV inverter Levelized Cost Of the Electricity (LCOE) generated during the PV system lifetime period is minimized. The LCOE is calculated also considering the failure rates of the components, which affect the reliability performance and lifetime maintenance cost of the PV inverter. A design example is presented, demonstrating that compared to the non-optimized PV inverter structures, the PV inverters designed using the proposed optimization methodology exhibit lower total manufacturing and lifetime maintenance cost and inject more energy into the electric-grid and by that minimizing LCOE.