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Which one of the following is correct?
In a switched capacitor network for VAR compensation the SCRs are commutated by
- a)forced commutation
- b)resonant commutation
- c)natural commutation
- d)delayed commutation
Correct answer is option 'B'. Can you explain this answer?
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Which one of the following is correct?In a switched capacitor network ...
Switched Capacitor Network for VAR Compensation
Switched capacitor network is a type of power electronics circuit that is used for power factor correction, voltage regulation, and reactive power compensation. In a switched capacitor network for VAR compensation, the capacitors are switched on and off at a certain frequency to compensate for the reactive power.
Commutation in SCR
In a switched capacitor network, the SCRs (Silicon Controlled Rectifiers) are used as switches to control the flow of current. The SCRs are turned on and off by commutation techniques.
Resonant Commutation
Resonant commutation is a technique used to turn off the SCRs in a switched capacitor network. In this technique, a resonant circuit is used to create a high voltage across the SCR, which turns it off quickly and efficiently.
Advantages of Resonant Commutation
Resonant commutation has several advantages over other commutation techniques:
1. Reduced switching losses: Resonant commutation reduces switching losses by minimizing the voltage and current stresses on the SCR.
2. High efficiency: Resonant commutation is highly efficient because it reduces the power dissipation in the SCR.
3. Low EMI (Electromagnetic Interference): Resonant commutation produces low EMI because it reduces the switching noise in the circuit.
Conclusion
In a switched capacitor network for VAR compensation, resonant commutation is used to turn off the SCRs. Resonant commutation reduces switching losses, improves efficiency, and produces low EMI.
Switched capacitor network is a type of power electronics circuit that is used for power factor correction, voltage regulation, and reactive power compensation. In a switched capacitor network for VAR compensation, the capacitors are switched on and off at a certain frequency to compensate for the reactive power.
Commutation in SCR
In a switched capacitor network, the SCRs (Silicon Controlled Rectifiers) are used as switches to control the flow of current. The SCRs are turned on and off by commutation techniques.
Resonant Commutation
Resonant commutation is a technique used to turn off the SCRs in a switched capacitor network. In this technique, a resonant circuit is used to create a high voltage across the SCR, which turns it off quickly and efficiently.
Advantages of Resonant Commutation
Resonant commutation has several advantages over other commutation techniques:
1. Reduced switching losses: Resonant commutation reduces switching losses by minimizing the voltage and current stresses on the SCR.
2. High efficiency: Resonant commutation is highly efficient because it reduces the power dissipation in the SCR.
3. Low EMI (Electromagnetic Interference): Resonant commutation produces low EMI because it reduces the switching noise in the circuit.
Conclusion
In a switched capacitor network for VAR compensation, resonant commutation is used to turn off the SCRs. Resonant commutation reduces switching losses, improves efficiency, and produces low EMI.
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Which one of the following is correct?In a switched capacitor network for VAR compensation theSCRs are commutated bya)forced commutationb)resonant commutationc)natural commutationd)delayed commutationCorrect answer is option 'B'. Can you explain this answer?
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