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ELECTRIC POWER SYSTEM AND CONTROL METHOD THEREOF

  • US 20170250538A1
  • Filed: 01/19/2017
  • Published: 08/31/2017
  • Est. Priority Date: 02/25/2016
  • Status: Active Grant
First Claim
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1. An electric power system for converting and transferring electric energy between an electric/kinetic energy conversion device and a power terminal, the electric power system comprising:

  • a variable-frequency drive comprising;

    a first power converter connected between a DC bus and the power terminal, wherein electric energy is transferred between the first power converter and the power terminal at a first power;

    a second power converter connected between the DC bus and the electric/kinetic energy conversion device, wherein electric energy is transferred between the second power converter and the electric/kinetic energy conversion device at a second power, wherein the second power is dynamically changed in response to an operational change of the electric/kinetic energy conversion device; and

    at least one energy storage module connected with the DC bus; and

    a control module connected with the variable-frequency drive and the electric/kinetic energy conversion device, wherein as the second power is dynamically changed, the control module controls a charge/discharge operation of the at least one energy storage module so as to reversely compensate the operational change of the electric/kinetic energy conversion device and reduce an influence of the operational change of the electric/kinetic energy conversion device on the first power.

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