Power Quality Solutions: Harmonic Filter Design, SVC, Active Filtering

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Statistical Modeling of Renewable Generation

  • Power electronic based WTs have probabilistic harmonic characteristics which mean the harmonics are continuously varying.
  • Conventional average-value based harmonic magnitude and fixed phase angle cannot fully reflect the probabilistic characteristics.
  • Conventional harmonic analysis may overestimate the harmonic impact in the planning studies that may result in the additional cost.
  • To reflect the realistic harmonic characteristics, probabilistic characteristics are fully considered.
  • Time and frequency domain analysis make it possible to model the probabilistic-based harmonic component.
  • This modeling methodology is used to analyze the more realistic harmonic impact on the grid in the planning studies.

PQ wind.png

- Frequency domain: Individual harmonic magnitudes are randomly generated based on their own probability density function.
- Time domain: A randomly generated virtual FFT page turns into a waveform that has probabilistic characteristics by using inverse FFT.

Power Quality Solutions: Harmonic Filter Design, SVC, Active Filtering

  • Power Quaity Issues : Flicker, Harmonics, Resonance, Sag, Swell, Voltage Stability and etc.
  • Static Var Compensator (SVC) :
- Compensate the Reactive Power.
- Mixed thyristors and passive filter.
  • Passive Harmonic Filter :
- Tuned filter(single, double, triple..), High Pass Filter
- Compensate the Reactive power
- Eliminate the specific or high order harmonics
  • Active Harmonic Filter :
- Use the Voltage Source Converter
- Compensate the Reactive power or not.
- Eliminate many harmonics.
  • Design Power Quality Solution : Filter and other FACTS Design and Experiments.

PQ harmonic.png

PQ Experiments.png

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