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    • 1. 发明申请
    • Transformerless power conversion in an inverter for a photovoltaic system
    • 用于光伏系统的逆变器中的无变压器功率转换
    • US20050139259A1
    • 2005-06-30
    • US10748587
    • 2003-12-30
    • Robert SteigerwaldMichael Rooij
    • Robert SteigerwaldMichael Rooij
    • H01L31/00H02J3/38H02J7/35
    • H02J3/383H02J7/35Y02E10/563Y02E10/566
    • A transformerless photovoltaic system that may benefit from inverter topologies more suitable for ripple current cancellation techniques is provided. In one exemplary embodiment, the system may combine basic modules of straightforward inverter topologies to meet requirements for higher power applications and may comprise a bipolar photovoltaic array, and a full-bridge inverter electrically coupled to the bipolar photovoltaic array. The full bridge inverter may comprise first and second inverter legs that may be arranged to energize two phases of a grid electrically coupled to the photovoltaic system. In one exemplary embodiment, switching signals applied to switching devices in each of the first and second inverter legs may be adjusted relative to one other to reduce ripple current therein, thereby reducing the size of components used by the system.
    • 提供了可以从更适合纹波电流消除技术的逆变器拓扑中受益的无变压器光伏系统。 在一个示例性实施例中,系统可以组合直接逆变器拓扑的基本模块以满足对较高功率应用的要求,并且可以包括双极光伏阵列以及电耦合到双极光伏阵列的全桥逆变器。 全桥逆变器可以包括第一和第二反相器支脚,其可被布置成对电耦合到光伏系统的电网的两相通电。 在一个示例性实施例中,施加到第一和第二反相器支路中的每一个中的开关装置的开关信号可以相对于彼此调节以减小其中的纹波电流,从而减小系统使用的部件的尺寸。