EP2907210A2 - Method for regulating the voltage of a transformer - Google Patents
Method for regulating the voltage of a transformerInfo
- Publication number
- EP2907210A2 EP2907210A2 EP13765717.7A EP13765717A EP2907210A2 EP 2907210 A2 EP2907210 A2 EP 2907210A2 EP 13765717 A EP13765717 A EP 13765717A EP 2907210 A2 EP2907210 A2 EP 2907210A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- voltage
- transformer
- quadrant
- line current
- voltage regulator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
- G05F1/14—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using tap transformers or tap changing inductors as final control devices
- G05F1/147—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using tap transformers or tap changing inductors as final control devices with motor driven tap switch
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1878—Arrangements for adjusting, eliminating or compensating reactive power in networks using tap changing or phase shifting transformers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Definitions
- the invention relates to a method for voltage regulation of a transformer with different winding taps and a voltage regulator.
- the voltage regulator consists of a current transformer connected to the secondary side of the transformer. An ohmic resistor and a capacitance are connected to this current transformer, which are used to influence an inductive or capacitive voltage drop. Through switches, both the tap for the ohmic voltage drop and the tap for the inductive voltage drop can be reversed independently.
- a voltage regulator and a method for voltage regulation of a transformer with a tap changer are known.
- the automatic control of transformers with tap changers, which are actuated by a motor drive is known from the company publication "microprocessor-controlled voltage regulator MK30" of the applicant.
- This voltage regulator controls the motor drive, which operates on the principle of stepping; this causes a voltage change of the transformer winding by one stage.
- the voltage controller sends a "higher” or “lower” control command to the motor drive if the voltage actual value deviates from the voltage setpoint within specified limits.
- This known voltage regulator has numerous function keys and setting elements, with which a parameterization of the voltage regulator is performed, d. H. certain criteria for the control to be set by the operator manually.
- the object of the present invention is to specify a method which is able to regulate different load flow directions with conventional transformer systems and voltage regulators in order to ensure a safe and reliable voltage supply.
- the dependent claims relate to particularly advantageous developments of the method.
- the idea according to the invention consists in using a generator A / consumer quadrant system in the voltage regulation process and mapping the line current in it. As soon as the line current is in a consumer quadrant, the setpoint of the voltage regulator is increased. When positioning the line current in a generator quadrant, the setpoint of the voltage regulator is lowered.
- the fundamental distinction between consumer and generator makes it possible to determine the load flow direction and thus to prevent the voltage band from being damaged by too high a feed-in power.
- windings of the winding on the primary side of the transformer are switched off after the increase in the setpoint value.
- turns of the winding are switched on the primary side of the transformer after lowering the set value.
- Figure 1 shows a schematic view of a transformer with the necessary means for reliable power supply at different load flow directions.
- FIG. 2 shows a quadrant system according to the invention.
- FIG. 3 shows a diagram in which a voltage curve runs in the setpoint range.
- FIG. 4 shows a flow diagram according to the invention for the method according to the invention.
- FIG. 1 illustrates a transformer 1 with a step winding 2 and different winding taps 3. This has a primary side P and a secondary side S.
- the winding taps 3 are switched on and off by an on-load tap-changer 4.
- the disconnection can, however, be implemented by any means, such as load selectors, switches, etc.
- the operation of the on-load tap-changer 4 takes place via a motor drive 5.
- This motor drive 5 is controlled by a controller 6 and a voltage regulator 7 integrated therein.
- the voltage regulator 7 detects at a point of entry 8 a line current I in a line 9 which connects the transformer 1 to a consumer / generator 10. This can of course also be a variety of consumers / producers.
- the voltage regulator 7 detects a voltage U, which is applied between the transformer 1 and the consumers / generators 7.
- the quadrant system 11 depicted in FIG. 2 consists of an X-axis X and a Y-axis Y which delimit a first quadrant 12, a second quadrant 13, a third quadrant 14 and a fourth quadrant 15.
- the real part of the line current I which is determined by the load of the consumers / generators and the lines, is plotted on the X-axis.
- the Y-axis represents the imaginary part of the line current I.
- the angle ⁇ between the vector representing the line current I and the X-axis represents the phase shift.
- angle ⁇ is a value between 0 ° and + 180 ° assumes the line current I of the voltage U, ie an inductive generator A / consumer is connected. If the angle ⁇ assumes a value between 0 ° and -180 °, the line current I precedes the voltage U, ie a capacitive generator / consumer is connected.
- a voltage drop can occur within a nominal value range 16, which is defined by an upper voltage limit value G 1 and a lower voltage limit value G 1
- the control method is shown as a flowchart.
- the first step 20 an input of the performance parameters of the system takes place.
- the transformer 1, the on-load tap-changer 4 and the associated lines understood. This also includes technical characteristics of the transformer 1, the on-load tap-changer 4 and the line lengths to the consumers / generators.
- This process step is commonly used in all control methods known in the art.
- the second step then takes place, namely the measurement 30 or 40 of the line current I or the voltage 40 at the transformer 1.
- These data are finally evaluated by the voltage regulator 7 and used to determine that the position of the line current I coincides with that associated phase position, in the illustrated in Figure 2 quadrant system is performed.
- An advantage of this method is the fundamental distinction between consumer and generator on the secondary side of a transformer 1. Determining whether power is fed or consumed on the secondary side, by adjusting the transformation ratio of the transform atros, prevents a voltage overshoot, ie an exceeding of the limits of the voltage band 16, from being caused by a high feed-in power. Another advantage of this method is that no additional equipment must be installed to detect the changing load flow and correct accordingly. By the method it is possible to use the existing components, eg transformer, voltage regulator, etc. LIST OF REFERENCE NUMBERS
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Electrical Variables (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012109639 | 2012-10-10 | ||
PCT/EP2013/069446 WO2014056695A2 (en) | 2012-10-10 | 2013-09-19 | Method for regulating the voltage of a transformer |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2907210A2 true EP2907210A2 (en) | 2015-08-19 |
Family
ID=49226170
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13765717.7A Withdrawn EP2907210A2 (en) | 2012-10-10 | 2013-09-19 | Method for regulating the voltage of a transformer |
Country Status (5)
Country | Link |
---|---|
US (1) | US9557753B2 (en) |
EP (1) | EP2907210A2 (en) |
CN (1) | CN104756344A (en) |
HK (1) | HK1214037A1 (en) |
WO (1) | WO2014056695A2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9600004B2 (en) * | 2015-02-09 | 2017-03-21 | General Electric Company | System and method for regulation of voltage on an electrical network |
CA3056769C (en) | 2017-03-17 | 2023-01-31 | Georgia Tech Research Corporation | Hybrid transformer systems and methods |
US20230282412A1 (en) * | 2019-10-16 | 2023-09-07 | Phasetown, Llc | Power generating transformer system (pgts), a power factor correction method in pgts, a pgts functioning also as power supply, and block diagrams of pgts |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2504278C2 (en) | 1975-02-01 | 1976-11-25 | Gossen Gmbh | ARRANGEMENT FOR VOLTAGE REGULATOR |
DE2616798B1 (en) | 1976-04-15 | 1977-10-06 | Reinhausen Maschf Scheubeck | VOLTAGE REGULATOR FOR STEPPED TRANSFORMERS |
JP3111898B2 (en) * | 1996-06-10 | 2000-11-27 | 富士電機株式会社 | Variable speed control device for AC motor |
DE19728220C1 (en) | 1997-07-02 | 1999-03-11 | Reinhausen Maschf Scheubeck | Voltage regulation method |
US20020024828A1 (en) * | 2000-08-31 | 2002-02-28 | Hidetake Hayashi | Inverter suitable for use with portable AC power supply unit |
US7319576B2 (en) * | 2005-08-18 | 2008-01-15 | Schweitzer Engineering Labortories, Inc. | Apparatus and method for providing differential protection for a phase angle regulating transformer in a power system |
JP4654217B2 (en) * | 2007-04-25 | 2011-03-16 | 日立オートモティブシステムズ株式会社 | Field weakening control device for permanent magnet motor and electric power steering using the same |
KR101353005B1 (en) * | 2009-05-07 | 2014-01-21 | 버지니아 일렉트릭 앤드 파워 컴퍼니 | Voltage conservation using advanced metering infrastructure and substation centralized voltage control |
JP5150585B2 (en) * | 2009-08-28 | 2013-02-20 | 株式会社日立産機システム | Permanent magnet synchronous motor drive device |
CN102640378B (en) * | 2009-09-15 | 2015-11-25 | 西安大略大学 | Distributed generator inverter is as the application of STATCOM |
JP5524796B2 (en) * | 2010-09-30 | 2014-06-18 | 株式会社ダイヘン | High frequency measuring device and calibration method of high frequency measuring device |
JP5748051B2 (en) * | 2011-05-10 | 2015-07-15 | サンデンホールディングス株式会社 | Synchronous motor applied voltage electrical angle setting method and motor control device |
-
2013
- 2013-09-19 WO PCT/EP2013/069446 patent/WO2014056695A2/en active Application Filing
- 2013-09-19 EP EP13765717.7A patent/EP2907210A2/en not_active Withdrawn
- 2013-09-19 CN CN201380052690.9A patent/CN104756344A/en active Pending
- 2013-09-19 US US14/428,176 patent/US9557753B2/en not_active Expired - Fee Related
-
2016
- 2016-02-19 HK HK16101870.5A patent/HK1214037A1/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO2014056695A2 * |
Also Published As
Publication number | Publication date |
---|---|
US9557753B2 (en) | 2017-01-31 |
US20150261232A1 (en) | 2015-09-17 |
HK1214037A1 (en) | 2016-07-15 |
CN104756344A (en) | 2015-07-01 |
WO2014056695A3 (en) | 2014-08-14 |
WO2014056695A2 (en) | 2014-04-17 |
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