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首页> 外文期刊>IEEE Transactions on Industrial Electronics >Modified LQR Technique for Fuel-Cell-Integrated Boost Converter
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Modified LQR Technique for Fuel-Cell-Integrated Boost Converter

机译：用于燃料电池集成升压转换器的改进的LQR技术

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摘要

Fuel cells (FCs) are an alternative source of energy whose by-products are heat, vapor, and water. For medium-power and standalone operation, an FC is integrated with a boost converter, as the required voltage level is higher than the supply. Control of such a converter with a slow dynamic source requires a fast-acting controller, since the demand executed by the controller affects the action taken by the hydrogen valve in FCs. In this article, a linear-quadratic regulator (LQR) is developed to control the power converter. In practical applications, the conventional LQR produces offset in output voltage due to effective series resistance (ESR) of the output capacitor. To make the LQR dynamic with load perturbation, information of inductor reference current is required, which changes with variation in load current. To solve these two problems, two modifications in the classical LQR have been proposed to minimize the impact of ESR (m-LQR) and incorporate control action based on the reference inductor current (M-LQR). The proposed methods are compared with the conventional average current-mode control technique. The M-LQR-based scheme is found to outperform the classical m-LQR technique in terms of improved transient dynamics and reduced offset at the steady state. In addition to numerical simulations, the proposed control techniques have been validated experimentally.
机译：燃料电池（FCS）是替代能源来源，其副产物是热，蒸气和水。对于中型电源和独立操作，FC与升压转换器集成，因为所需的电压电平高于电源。控制具有慢动态源的这种转换器需要快速作用控制器，因为控制器执行的需求影响FCS中的氢气阀所采取的动作。在本文中，开发了线性二次调节器（LQR）以控制功率转换器。在实际应用中，由于输出电容的有效串联电阻（ESR），传统的LQR在输出电压中产生偏移。为了使LQR动态带有负载扰动，需要电感器参考电流的信息，这与负载电流的变化发生变化。为了解决这两个问题，已经提出了在经典LQR中进行的两个修改，以最小化ESR（M-LQR）的影响并基于参考电感器电流（M-LQR）结合控制动作。将所提出的方法与传统的平均电流模式控制技术进行比较。基于M-LQR的方案，在改进的瞬态动力学和稳定状态下减少偏移时，发现基于M-LQR的方案优于经典的M-LQR技术。除了数值模拟之外，所提出的控制技术已经通过实验验证。

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