交流系统与换流站交流滤波器最小串联阻抗的分析与研究
发布时间：2018-12-29 20:45
【摘要】：交流滤波器在高压直流输电工程中被广泛应用,承担着滤除交流侧谐波和提供无功补偿的作用。稳态定值计算是交流滤波器设计中的重要组成部分,计算过程中需要得到滤波器阻抗与系统阻抗的串联最小阻抗值,用以计算滤波器元件上的最大定值电流电压应力。该文首先从理论上证明,在系统阻抗和滤波器阻抗的电阻值均大于零的情况下,串联阻抗极小值点位于系统阻抗区域的边界上。然后,引入拉格朗日乘数法,推导出目前常用的系统阻抗区域类型的串联阻抗极小值计算公式。最后利用仿真分析法验证该文算法的正确性,对比结果显示,该文提出的方法在计算精度方面较原有的找谐振点法更好。
[Abstract]:Ac filters are widely used in HVDC transmission projects, which play the role of filtering AC side harmonics and providing reactive power compensation. The steady-state constant value calculation is an important part in the design of AC filter. In the process of calculation, the series minimum impedance of filter impedance and system impedance should be obtained to calculate the maximum constant current voltage stress on filter elements. In this paper, it is theoretically proved that when the impedance of the system and the impedance of the filter are both greater than zero, the minimum point of the series impedance is located at the boundary of the impedance region of the system. Then the Lagrange multiplier method is introduced to derive the series impedance minima formula which is commonly used at present. Finally, the correctness of the algorithm is verified by the simulation analysis method. The comparison results show that the proposed method is better than the original resonance point finding method in the accuracy of calculation.
【作者单位】： 中国农业大学信息与电气工程学院北京市;南京国电南自电网自动化有限公司;
【分类号】：TM721.1
本文编号：2395373
[Abstract]:Ac filters are widely used in HVDC transmission projects, which play the role of filtering AC side harmonics and providing reactive power compensation. The steady-state constant value calculation is an important part in the design of AC filter. In the process of calculation, the series minimum impedance of filter impedance and system impedance should be obtained to calculate the maximum constant current voltage stress on filter elements. In this paper, it is theoretically proved that when the impedance of the system and the impedance of the filter are both greater than zero, the minimum point of the series impedance is located at the boundary of the impedance region of the system. Then the Lagrange multiplier method is introduced to derive the series impedance minima formula which is commonly used at present. Finally, the correctness of the algorithm is verified by the simulation analysis method. The comparison results show that the proposed method is better than the original resonance point finding method in the accuracy of calculation.
【作者单位】： 中国农业大学信息与电气工程学院北京市;南京国电南自电网自动化有限公司;
【分类号】：TM721.1
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