Abstract：Measurement accuracy of AC harmonic voltage is important to ensure the operation safty of high voltage DC (HVDC) system and to validate the effectiveness of the AC filter design. This paper proposes a novel method to measure the harmonic voltage on AC side of HVDC system. The principle is measuring the current of the AC filter, and calculating the harmonic voltage on AC side according to the harmonic analysis from the measured current and the given impendence-frequency characteristic of the filter. The effects of AC filter component detuning on the measurement of harmonic voltage are studied in detail. The theoretical expressions for a double-tuning AC filter are deduced, to describe the relationship between the measurement error of harmonic voltage and the detuning degree of the filter parameters. The influence of detuning degree on the measurement of individual harmonic voltage is also analyzed. The relative sensitivities of the harmonic voltage measurement error to the filter component parameters are studied. Finally, the proposed method is verified by the simulation and lab test.
毛涛, 乐健, 黄银龙, 罗汉武, 刘开培. 参数失谐对基于滤波器的高压直流输电系统交流侧谐波电压测量的影响[J]. 电工技术学报, 2016, 31(4): 147-154.
Mao Tao, Le Jian, Huang Yinlong, Luo Hanwu, Liu Kaipei. The Influence of the Parameter Detuning on the AC Harmonic Voltage Measurement Based on Filter. Transactions of China Electrotechnical Society, 2016, 31(4): 147-154.
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