Sample interview questions: Can you explain your knowledge of electrical system harmonic filters and power factor correction devices?
Sample answer:
- Electrical System Harmonic Filters:
- Definition: Devices used to reduce harmonic currents and improve power quality in electrical systems.
- Operation: Harmonic filters absorb or cancel harmonic currents, preventing them from causing problems in electrical equipment and systems.
- Types:
- Passive Filters: Use capacitors, inductors, and resistors to filter out harmonics.
- Active Filters: Use power electronics to generate currents that cancel out harmonics.
- Hybrid Filters: Combine passive and active filters to provide a more effective solution.
- Power Factor Correction Devices:
- Definition: Devices used to improve the power factor of an electrical system, reducing energy losses and improving efficiency.
- Operation: Power factor correction devices inject reactive power into the system, compensating for the reactive power consumed by inductive loads.
- Types:
- Capacitor Banks: Provide reactive power compensation and improve power factor.
- Static VAR Compensators (SVCs): Advanced power electronics devices that provide dynamic reactive power compensation.
- Synchronous Condensers: Rotating machines that generate reactive power and improve power factor.
- Benefits of Harmonic Filters and Power Fa… Read full answer
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