×

DC voltage regulator

  • US 8,520,417 B2
  • Filed: 03/28/2008
  • Issued: 08/27/2013
  • Est. Priority Date: 03/30/2007
  • Status: Active Grant
First Claim
Patent Images

1. A turbine generator DC bus voltage regulator system, comprising:

  • a power converter circuit that includes a converter component and a line inverter component with a DC bus junction situated between the converter component and the line inverter component configured to process power generated by an electrical power generation system;

    a voltage regulator control board configured to detect a shift in the DC Bus voltage away from normal operational values during a voltage irregularity and maintain overvoltage regulation operational characteristics for the DC bus junction during the voltage irregularity, and further comprising;

    an input element configured to determine a value of the DC bus junction voltage,an overvoltage regulation component configured to determine and generate an overvoltage regulation reference signal based on a nominal operating value of the DC bus junction voltage and an overvoltage operating voltage range, anda proportional plus integral controller component configured to process the difference between an overvoltage reference signal and the DC bus junction voltage and to generate a proportional plus integral controller output signal;

    a comparator component configured to continuously modulate the pulse width of a switching signal applied to the switching device during the voltage irregularity by comparing a signal based on the proportional plus integral controller output signal to a periodic waveform, to maintain the DC bus voltage within an operating range centered around the overvoltage regulation reference signal for the duration of the voltage irregularity;

    a switching device connected to an output from the comparator component and a negative side of the DC bus junction;

    a resistor connected in series between the switching device and a positive side of the DC bus junction configured to facilitate continuously modulated power dissipation in coordination with the switching device during the voltage irregularity and maintain overvoltage operational characteristics including an overvoltage reference operational voltage value; and

    a flyback diode connected in parallel to the resistor with the cathode of the diode connected to the positive side of the DC bus junction.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×