基于感应滤波的电力推进船舶电网谐波抑制

为研究谐波抑制方法在电力推进船舶电网中的应用,提出了一种基于感应滤波方式,同时具有自耦补偿和谐波抑制作用的新型推进变压器结构。该变压器二次侧采用延边三角形接线,它将传统滤波和无功补偿装置移至绕组内部且公共绕组的等效短路漏电感为零设计,使船舶大功率变流设备在电能变换过程中产生的谐波源无法进入交流网侧,有效地抑制了谐波对船舶电网的污染。对比船舶电网传统滤波方法,对新型推进变压器的结构设计,滤波原理进行了介绍,并分别对基于新型和传统推进变压器的6相交直交推进方式船舶电力系统进行了SIMU-LINK仿真,仿真结果的电流波形和电流频谱验证了方案的正确性和可行性。

Harmonic Suppression in Power Networks of Electric Propulsive Ships Based on Inductive Filtering Method

For studying the harmonic suppression function in power networks of electric propulsive ships,a new-type propulsion transformer structure featuring self-coupled reactance compensation based on inductive filtering method is presented.Secondary side of the transformer wired in extended delta configuration.The transformer is designed that the filter and reactive compensation functions are inside it and that the equivalent short-circuit leakage inductance of the common windings is zero,which makes harmonic power produced by marine high-power converter equipment in process of power transformation not enter AC net side and effectively reduces harmonic contamination of the electric power network.In association with traditional filtering method,design of the new transformer structure and principle of the filtering are introduced.SIMULINK simulations of marine power system of 6-phase AC-DC-AC propulsion based on the new type and traditional transformer is carried out respectively,simulation current waveforms and spectrums of results proves that the scheme is effective.