Low-loss DC to AC converter system for stand alone photovoltaic applications
Low-loss DC to AC converter system for stand alone photovoltaic applications
复制标题
适用于独立光伏应用的低损耗直流至交流转换器系统
DOI：
10.1109/pesc.1992.254814
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
J. Schoeman
中科院分区：
文献类型：
--
作者：
C. Simpson;J. V. van Wyk;J. Schoeman
研究了一种具有高频链的复合变换器，用于独立的DC到AC转换应用，例如由光伏板充电的电池。次级变换器是电源换相高频桥，而初级逆变器进行了进一步的研究。采用中心抽头式Transformer逆变器，并采用两种方法减小开关损耗。第一种方法是实施再生缓冲器。第二种是一种强制零电压开关的新方法。第二种方法的PSPICE模拟显示了在空载条件下的软开关，而实验设置显示了在空载和负载条件下的软开关高达2千伏安。除了ZVS之外，这种方法还提供了诸如大大降低的损耗、高效率和低实施成本的特征。据信，该方法导致用于低压光伏和电池应用的DC到220 V-AC转换的最佳配置。<<ETX>>
A composite converter with a high-frequency link was investigated for stand alone DC-to-AC-conversion applications such as batteries charged by photovoltaic panels. The secondary converter was a supply-commutated high-frequency bridge, while the primary inverter was investigated further. A center-tap transformer inverter was chosen, and two approaches were used to minimize switching losses. The first approach was to implement regenerative snubbers. The second was a new method that forced zero voltage switching (ZVS). A PSPICE simulation of the second method showed soft switching under no-load conditions, while the experimental setup showed soft switching under both no-load and load conditions up to 2 kVA. This approach offers, in addition to ZVS, features such as greatly reduced losses, a high efficiency, and low implementation cost. It is believed that this approach leads to the optimum configuration for DC-to-220 V-AC-conversion for low-voltage photovoltaic and battery application.<<ETX>>