Method for regulating the voltage of a transformer

Patent metadata

Field	Value
Publication number	US-9557753-B2
Application number	US-201314428176-A
Country	US
Kind code	B2
Filing date	Sep 19, 2013
Priority date	Oct 10, 2012
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

The invention relates to a method for regulating the voltage of a transformer ( 1 ) having different winding taps ( 3 ). The problem addressed by the invention is that of providing a method with which different load flow directions can be regulated with conventional transformers ( 1 ) and voltage regulators ( 7 ) in order to ensure a safe and reliable supply of voltage. The general inventive concept consists in determining, using a method in which a quadrant system ( 11 ) is used, the phase angle of the conduction current (I) and thus the load flow direction, thereby preventing deviation from the voltage range as a result of power input that is too high, by controlling the load tap changer ( 4 ).

First claim

The invention claimed is:

1. A method for voltage regulation of a transformer with different winding taps and a voltage regulator, comprising the steps of:
initially determining the conduction current present at the transformer and simultaneously ascertaining the instantaneous voltage present at the transformer;
using a quadrant system in which a first quadrant and a second quadrant show the phase position φ of the conduction current from generators to the transformer and a third quadrant and a fourth quadrant show the phase position φ of the conduction current from the transformer to the consumers; and
if the phase position φ of the conduction current is detected in the third quadrant or in the fourth quadrant of the voltage regulator, raising an instantaneous voltage to a target value range or
if the phase position φ of the conduction current is detected in the first quadrant or in the second quadrant of the voltage regulator, lowering an instantaneous voltage to a target value range.

2. The method for voltage regulation according to claim 1 , further comprising the step, when the instantaneous voltage is raised to the target value range, of:
switching off windings of the tap winding on the primary side of the transformer.

3. The method for voltage regulating according to claim 1 , further comprising the step, when the instantaneous voltage is lowered to the target value range, of
switching on windings of the tap winding on the primary side of the transformer.

Assignees

• Reinhausen Maschf Scheubeck
• Maschinefabrik Reinhausen Gmbh

Inventors

• Hinz Ansgar
• Proelss Helmut
• Viereck Karsten

Classifications

• H02J3/1878

  using tap changing or phase shifting transformers · CPC title

• H02J3/12

  Arrangements for adjusting voltage in AC networks by changing a characteristic of the network load · CPC title

• H01F27/29

  Terminals; Tapping arrangements {for signal inductances} · CPC title

• G05F1/147 Primary

  with motor driven tap switch · CPC title

• Y02E40/30

  Reactive power compensation · CPC title