In order to improve the restraining ability to disturb DC/DC converters with large voltage step-up ratio used in the fuel cell system, a novel double-closed-loop controller with paremeters self-adjusted was presented. Gain compensation and a method of PI parameters' dynamic adjustment were adopted in the inner current loop. These measures eliminated the adverse control effect caused by a wide range of input voltage, and improved the ability to adapt to a wide range of load changes. The outer voltage loop combined the fuzzy reasoning with variable-parameter PI control to make up a novel voltage loop composite controller, whose dynamic regulating process can be divided into linear, fuzzy and complex control areas. This composite voltage controller improved the rejection capability of a wide range of load disturbance. The novel double-closed-loop controller was applied practically into a DC/DC converter with input voltage of 30 ~ 70 V, output voltage of 360 V, power rating of 3 kW. The experimental results indicate that, compared with conventional controller, the novel double-closed-loop controller has faster response to the input and load disturbance and less output overshoot. And the converter switches between different quiescent operating points rapidly and smoothly.%为提高燃料电池用大升压比DC/DC变换器的抗扰性能,提出一种参数自调整双闭环控制器.电流内环采用增益补偿和动态自调整PI参数方法,以消除宽范围电压输入引起的不良控制效果,并提高对负载大范围变化的自适应能力；电压外环采用一种模糊推理与变参数PI控制相结合的方式,组成复合电压控制器,其动态调节划分为线性、模糊和复合3个控制区域,提高了对大范围负载扰动的抑制能力.该控制器应用于一台30～70 V输入、360 V输出、额定功率3kW的DC/DC变换器.实验结果表明,相比于常规控制器,新型双闭环控制器对变换器输入和负载扰动具有更快的响应速度,更小的输出超调,实现了各静态工作点间快速平稳切换.
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