基于场路耦合法的新型换流变压器电磁特性的仿真研究

发布时间：2018-10-26 11:02

【摘要】：由于新型换流变压器具有较特殊的接线方案,其电磁特性直接关系电磁参数的设计及系统运行。基于场路耦合法,建立了新型换流变压器的场路耦合数学模型,并以某一实际新型换流变压器的原理样机数据为依据,建立了相应的有限元仿真模型;并对该新型换流变压器在投入和不投入阀侧滤波器两种工况进行仿真,通过对比两种工况条件条件下的网侧电流、感应电动势、励磁电流及铁心主磁通,结果表明:新型换流变压器在投入阀侧滤波器条件下,网侧电流中的谐波含量大大降低;感应电动势畸变率变小;励磁电流和铁心主磁通波形接正弦。新型换流变压器的电磁特性较传统换流变压器得到大大改善,有利于降低谐波对换流变压器的不利影响。
[Abstract]:Because the new converter transformer has a special connection scheme, its electromagnetic characteristics are directly related to the design of electromagnetic parameters and the operation of the system. Based on the field circuit coupling method, the field circuit coupling mathematical model of a new converter transformer is established, and the corresponding finite element simulation model is established based on the data of a practical prototype of a new type converter transformer. The new converter transformer is simulated under two working conditions, which are on and off the valve side filter. By comparing the grid side current, inductive electromotive force, excitation current and the core main flux under the two working conditions, The results show that the harmonic content in the grid-side current of the new converter transformer is greatly reduced when the filter is put into the valve side. The distortion rate of induction electromotive force becomes smaller; the excitation current and the main flux waveform of iron core are connected to sinusoidal. The electromagnetic characteristics of the new converter transformer are greatly improved than those of the traditional converter transformer, which is helpful to reduce the adverse effect of harmonic wave on the converter transformer.
【作者单位】：国网湖南省电力公司;湖南大学电气与信息工程学院;
【分类号】：TM721.1

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