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Related Concept Videos

Generator Voltage Control01:21

Generator Voltage Control

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Generator voltage control is crucial for maintaining the stable operation of synchronous generators and wind turbines. In older models, a DC generator driven by the rotor delivers DC power to the rotor's field winding, and the power is transferred through slip rings and brushes. In the latest models, static or brushless exciters are used. Static exciters rectify AC power from the generator terminals and then transfer the DC power directly to the rotor. Brushless exciters, on the other hand,...
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A three-phase generator produces three voltages that are equal in magnitude but have a phase difference of 120 degrees. This identical magnitude and equal phase separated voltages are known as the balanced voltages and help to minimize power loss while ensuring a steady delivery of energy to connected loads. As voltage sources in a three-phase system can be configured in a wye or a delta formation, the loads connected to these systems can also be arranged in either configuration. This...
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Voltage Doubler Circuit01:23

Voltage Doubler Circuit

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A voltage doubler circuit integrates two main components: a clamping section and a rectifier section. The clamping section consists of a capacitor (C1) and a diode (D1), whereas the rectifier section is equipped with another diode (D2) and capacitor (C2). This circuit produces an output voltage with twice the amplitude of the sinusoidal input voltage.
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Secondary distribution systems provide electrical energy at the utilization voltage levels from distribution transformers to customer meters. Typical secondary voltages in the United States include 120/240 V for residential use, 208Y/120 V for residential and commercial use, and 480Y/277 V for industrial and high-rise commercial use.
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The Delta-to-Delta Circuit

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In a delta-delta configuration, the source and the load are connected in a delta manner, forming a closed loop that divides the network into three distinct phases. This configuration makes the phase voltages identical to line voltages. Assuming the sources are in positive sequence, the phase voltages can be expressed directly without having a neutral wire.
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Stabilized voltage source inverter for sensitive loads in nuclear installations.

Marwa M Mousa1,2, Khalid F A Hussein3, Z Matter4

  • 1Electrical Engineering Department, Faculty of Engineering, Al-Azhar University, Cairo, Egypt. marwamousa78@gmail.com.

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This summary is machine-generated.

This study introduces a stabilized single-phase voltage-source inverter for photovoltaic systems, ensuring pure sinusoidal output voltage for sensitive loads. The novel design significantly reduces total harmonic distortion (THD) and enhances efficiency.

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Area of Science:

  • Electrical Engineering
  • Power Electronics
  • Renewable Energy Systems

Background:

  • Sensitive loads, particularly in nuclear installations, require highly stable and pure sinusoidal voltage.
  • Existing voltage-source inverters often struggle to meet stringent harmonic distortion and stability requirements.
  • Photovoltaic (PV) systems need reliable power conditioning for feeding sensitive electrical equipment.

Purpose of the Study:

  • To propose a novel design for a stabilized single-phase voltage-source inverter.
  • To achieve a pure sinusoidal output voltage with minimal total harmonic distortion (THD) for PV systems.
  • To ensure stable voltage magnitude and frequency for sensitive loads, irrespective of load impedance variations.

Main Methods:

  • Utilized an H-bridge configuration with insulated gate bipolar transistors (IGBTs).
  • Implemented a control system featuring a Digital Signal Processor (DSP) and microcontroller for harmonic cancellation.
  • Employed pulse width modulation (PWM) with a feedback system measuring output voltage waveform, THD, frequency, and amplitude.

Main Results:

  • Demonstrated stabilization of voltage amplitude and frequency regardless of load impedance.
  • Achieved a total harmonic distortion (THD) of less than 0.5%, approaching zero.
  • Reported considerably reduced switching losses and an average inverter efficiency exceeding 95%.

Conclusions:

  • The proposed inverter design effectively provides a pure sinusoidal output voltage suitable for sensitive loads.
  • The advanced control system ensures high stability and minimal harmonic distortion, enhancing power quality.
  • The design offers high efficiency and reduced losses, making it a viable solution for PV systems in critical applications.