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Sensorless Feedforward Current Control of Dual-Active-Bridge DC/DC Converter for Micro-Grid Applications

机译:用于微电网应用的双极桥DC / DC转换器的无传感器前馈电流控制

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In Dual-Active-Bridge converter control system, high frequency terminal current is usually measured then fed-back to the current mode controller. However, the measurement requires wide bandwidth sensors, fast and precise operational amplifier, and high sampling rate Analog to Digital conversion. This paper proposes a Proportional Integral Observer to estimate such the current to eliminate the need of current sensors. A combined feedforward-feedback control system is then developed to enhance the system dynamics and to regulate the output voltage. The control system needs only the information of terminal voltages. Simulation and experiment results show that the observer performs fast and accurately with acceptable observation error; and the output voltage is well regulated regardless of load changes.
机译:在双极桥转换器控制系统中,通常测量高频端电流然后送回电流模式控制器。然而,测量需要宽带宽传感器,快速和精确的运算放大器,以及高采样速率模数与数字转换。本文提出了一种比例积分观察者来估计这种电流以消除电流传感器的需要。然后开发了一种组合的前馈反馈控制系统以增强系统动态并调节输出电压。控制系统仅需要终端电压的信息。仿真和实验结果表明,观察者以可接受的观察误差快速准确地执行;无论负载变化如何,输出电压都很好地调节。

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