선택한 단어 수는 입니다.
최소 단어 이상 선택하여야 합니다.
최소 단어 이상 선택하여야 합니다.
선택한 단어 수는 30입니다.
최대 10 단어까지만 선택 가능합니다.
최대 10 단어까지만 선택 가능합니다.
가설 설정
- Figure 8 (a) and (b) show three-phase voltage and current waveforms magnitude of each harmonic order (%) measured by power quality analyzer in the power system with the designed filter respectively. Although it is not a perfect sine wave, the current waveforms of Figure 8(a) with passive filter are similar to a sine wave. And the 5th harmonic current is decreased to 7.
- After determining the type of filter (tuned filter and high pass filter) according to harmonic order and magnitude, we determined the reactor impedance and rating to achieve the desired tuning, resistor value and quality factor (Q-factor) was calculated. Next we researched whether the compensated reactive power, harmonic limit of the power system and the voltage and current values of the passive filter are proper. Finally, the filter response, the effect of tolerances in the capacitor value and reactor value, the peak voltage across the capacitor and adverse interactions with the power system were checked.
- First, we measured the harmonic current spectrum, voltage and current waveform and magnitude produced in the considered power system. Next, we determined the amount of harmonic current to be filtered and the size of the capacitor for the filters based on the required harmonic current rating and the fundamental frequency reactive power needed in the target power system. After determining the type of filter (tuned filter and high pass filter) according to harmonic order and magnitude, we determined the reactor impedance and rating to achieve the desired tuning, resistor value and quality factor (Q-factor) was calculated.
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