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电网技术  2011 

一种大功率电力电子设备的数据采集系统

, PP. 150-155

Keywords: 数据采集,电力电子,信号处理,模数转换

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Abstract:

本文研制了一种应用于大功率电力电子设备的数据采集系统。该系统由测量元件、同步单元、采集单元和后处理单元等四部分组成。其中,测量元件是与一次回路直接连接的高电压设备,用于将一次回路的高电压、大电流按比例变送为小模拟信号;根据不同需求,测量元件的设计和安装可分为接地支路的电压测量、不接地支路的电压测量、接地支路的电流测量和不接地支路的电流测量四种情况分别加以解决。同步、采集和后处理单元是微电子电路,主要部件位于地电位,用于完成模数转换、数据传输、滤波、消偏置等多项信号处理,通过合理设计各单元的内部结构和接口形式,即可使各单元按特定的时序协同工作。本系统已经成功应用于实际工程,运行结果验证了系统的测量精度和可靠性。

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