作　　者： ; ; ; ; (童晋方）;

机构地区： 华南理工大学电力学院

出　　处： 《高电压技术》 2016年第10期3068-3074,共7页

摘　　要： 为保证LCL滤波器性能、提高LCL滤波器参数设计效率,基于电压源型换流器(VSC)的序分量动态相量(DPSCs)谐波分析模型,提出了一种LCL滤波器参数的确定性设计方法。该方法对换流器侧电感、滤波电容和网侧电感分别进行计算。换流器侧电感由功率约束和电流动态跟踪约束确定,并选取其下限值作为设计值;滤波电容由无功功率约束确定;通过谐波分析模型定量计算VSC各次谐波分量,并以IEEE 1547标准规定的并网谐波电流畸变率为约束条件,计算出网侧电感值,最后通过稳定性分析和仿真与实验验证滤波器参数设计的有效性。实验结果表明,所设计的LCL滤波器使得开关频率附近的谐波电流减少至0.02 A,高次谐波电流含有率约为0.23%。所提出的LCL滤波器确定性设计方法能有效提高LCL滤波器参数设计效率,减少了参数设计过程中的反复试凑和复杂的优化算法。 In order to improve the performance and designation efficiency of LCL filters, we put forward a novel deterministic designation method of LCL filter based on the harmonic analysis model of voltage source converter（VSC） with dynamic phasor sequence components（DPSCs）. Converter side inductor, capacitor, and grid side inductor are designed, respectively. The restraints of power and the tracking of AC current are considered when the converter side inductor is designed. The minimum value are selected as the designation value. The capacitor in the filter is designed with the constraint of the reactive power. With the calculation results of the harmonic analysis model based on DPSCs, the grid side inductor can be calculated determinately with the constraint of the harmonic current limit presented in IEEE 1547. Finally, the parameters of LCL filters can be verified to be effective by the stability analysis, simulations, and experiments. The experimental results show that the high-order harmonic currents reduce to the 0.02 A and the harmonic distortion ratio is about 0.23%. The method can avoid repetitive trial and complex optimization during the designation of LCL filters which simplify the designation of LCL filters a lot. At the same time, the small value of inductors can be also assured which decrease the volume and cost of the converter.

关 键 词： 电压源型换流器 滤波器 谐波 序分量动态相量 稳定性分析

领　　域： [电气工程]