【摘要】 针对航空电源频率变化宽的要求,提出了一种新的航空有源滤波器。通过提取电网输入电流基波,并作为逆变器的基准,由逆变器产生基波补偿电流,并通过串联在电网与负载之间的电流变压器注入电网。当注入电流与电网电流基波成一定比例时,变压器初级对基波呈现低阻抗,对谐波呈现高阻抗。无源滤波器由单电容构成,可以对频率变化的电源系统起到很好的滤波作用。试验证明,新的拓扑和控制策略简单可靠,可以很好地满足航空电源对电网输入电流的要求,具有广泛的应用前景。更多还原

【Abstract】 In this paper a novel active power filter for variable-frequency aeronautic power supply,based on the fun-damental compensation of the series current transformer is analyzed.In the active power filter,a series transformer is cho-sen with its primary winding is connected in series between the power utility and harmonic-producing loads.The compen-sating fundamental current proportional to the fundamental component of the utility current is injected to the secondary winding of the series current transformer.When the injected fundamental current and the fundamental current of the power utility satisfy the fundamental compensation condition,the series current transformer can really exhibit very low impedance at the fundamental frequency and high magnetizing impedance at harmonics frequencies.And the passive power filter is composed of only one capacitance,which could work well for variable-frequency power system.The validity of the theory and excellent compensation characteristics are verified by a large-rated prototype.更多还原