Download S - Michigan State University

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Transcript
Figure 9.1 An ideal variable capacitor
phase angle of ac current IC to lag the phase angle of ac voltage VS by 90°, and controlling the
amplitude of IC to achieve the desired equivalent capacitance Cac. However, this traditional Hbridge implementation has a well-known problem of a large dc link capacitor Cdc, due to the low
frequency harmonic (2ω ripple) inherent with the H-bridge topology [71]. This dc capacitor is 10
times (assuming the dc voltage ripple peak-to-peak is 5%) as big as the ac capacitance shown in
Figure 9.1 in order to maintain the dc voltage ripple low. In addition, increasing the switching
frequency is not an option here. Although increasing the switching frequency can reduce the
inductance, unfortunately it does not reduce this dc capacitance.
Figure 9.2 A variable capacitor implemented by an H-bridge inverter
Therefore, this chapter proposes a solid state variable inductor-capacitor (SSVLC), as shown
in Figure 9.3. Figure 9.3 (a) shows the proposed solid state variable inductor (SSVL) and Figure
9.3 (b) shows the proposed solid state variable capacitor (SSVC). The proposed SSVLC can
135
Document related concepts

Mains electricity wikipedia, lookup

History of electric power transmission wikipedia, lookup

Power engineering wikipedia, lookup

Buck converter wikipedia, lookup

Switched-mode power supply wikipedia, lookup

Opto-isolator wikipedia, lookup

Alternating current wikipedia, lookup

Metadyne wikipedia, lookup

Voltage optimisation wikipedia, lookup

Voltage regulator wikipedia, lookup

Resistive opto-isolator wikipedia, lookup

Rectifier wikipedia, lookup

Stray voltage wikipedia, lookup

Surge protector wikipedia, lookup

Distribution management system wikipedia, lookup

Current source wikipedia, lookup

Triode wikipedia, lookup

Pulse-width modulation wikipedia, lookup

Variable-frequency drive wikipedia, lookup

Integrating ADC wikipedia, lookup

Ohm's law wikipedia, lookup

Islanding wikipedia, lookup

Power inverter wikipedia, lookup

Electrical ballast wikipedia, lookup

Electrical substation wikipedia, lookup

Capacitor wikipedia, lookup

Three-phase electric power wikipedia, lookup

Stepper motor wikipedia, lookup

Spark-gap transmitter wikipedia, lookup

Mercury-arc valve wikipedia, lookup

Electric power system wikipedia, lookup

Solar micro-inverter wikipedia, lookup

Power MOSFET wikipedia, lookup

Power factor wikipedia, lookup

Coilgun wikipedia, lookup

P–n diode wikipedia, lookup