{
  "$type": "site.standard.document",
  "description": "It is described a harmonic current controller for controlling harmonic currents being generated by a grid-side converter of a frequency converter. The frequency converter is adapted to convert an electrical input power of a power supply unit having a first frequency into an electrical output power…",
  "path": "/patents/972933",
  "publishedAt": "2014-07-02T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H02J3/38",
    "SIEMENS AG [DE]"
  ],
  "textContent": "It is described a harmonic current controller for controlling harmonic currents being generated by a grid-side converter of a frequency converter. The frequency converter is adapted to convert an electrical input power of a power supply unit having a first frequency into an electrical output power having a second frequency, wherein the electrical output signal is provided to a grid. A grid-side controller is adapted to control the grid side part of the power conversion, wherein, during the conversion, at least some harmonic currents are generated by the grid side converter. The harmonic current controller (100) comprises an input terminal being adapted to receive a first (101) and a second (102) current feedback signal received from a frame transformation of a measured three-phase grid current, and a first (103) and a second (104) harmonic current reference signal for each harmonic current to be controlled, a comparator unit (106) being adapted to compare the first and the second current feedback signal with the first and the second harmonic current reference signal, respectively, wherein the output signals of the comparator unit are a first regulating error signal (107) and a second regulating error signal (108), and a regulating unit (109) being adapted to receive the first regulating error signal (107) and the second regulating error signal (108), to determine a first harmonic voltage control signal (110) and a second harmonic voltage control signal (111) based on the error signals (107, 108), wherein the harmonic current controller (100) is adapted to supply the voltage control signals to a further unit of the grid-side controller in order to control the harmonic currents generated by the grid side converter.",
  "title": "Harmonic current controller"
}