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为了更有效设计高压直流输电系统直流滤波器,论述了一种基于滤波器等效原则的并且适用于工程实际的直流滤波器设计方法,并详细论述了实际工程中直流滤波器设计的要求。该设计方法具体过程为:通过将多调谐滤波器等效成对应个单调谐滤波器,以多调谐滤波器的主电容值和调谐次数为限制条件,先计算各个单调谐滤波器参数,再经过等效公式得到多调谐滤波器的参数,避免通常的根据调谐次数计算多调谐滤波器参数的复杂的计算公式。根据该设计方法,可以方便地通过调整等效单调谐滤波器的参数而改变多调谐滤波器的参数,同时能保持多调谐滤波器的主电容值和调谐次数不变,提高了直流滤波器设计的效率。最后通过一个工程算例校验了该设计方法。
In order to design the DC filter of HVDC system more effectively, a DC filter design method based on the principle of filter equivalence and applicable to engineering practice is discussed. The requirements of DC filter design in practical engineering are discussed in detail. The specific process of the design method is as follows: first, by calculating the parameters of each single tuned filter by equating multiple tuned filters into corresponding single tuned filters, and using the main tuned capacitance of the tuned filter and the number of tuned times as constraints, The equivalent formula gives the parameters of a multi-tuned filter, avoiding the usual complex calculation formula for calculating the parameters of a multi-tuned filter based on the number of tuned times. According to the design method, it is convenient to change the parameters of the multi-tuned filter by adjusting the parameters of the equivalent single tuned filter, and at the same time, the main capacitor value and the number of tuning times of the multi-tuned filter are kept constant, thereby improving the design of the DC filter s efficiency. Finally, a design example is used to verify the design method.