EP3443661A1 - Procédé d'alimentation d'un enroulement d'excitation d'un rotor en courant d'excitation, procédé de fonctionnement d'une installation de génération d'une tension triphasée, ainsi qu'une installation correspondante - Google Patents

Procédé d'alimentation d'un enroulement d'excitation d'un rotor en courant d'excitation, procédé de fonctionnement d'une installation de génération d'une tension triphasée, ainsi qu'une installation correspondante

Info

Publication number
EP3443661A1
EP3443661A1 EP17720412.0A EP17720412A EP3443661A1 EP 3443661 A1 EP3443661 A1 EP 3443661A1 EP 17720412 A EP17720412 A EP 17720412A EP 3443661 A1 EP3443661 A1 EP 3443661A1
Authority
EP
European Patent Office
Prior art keywords
frequency
rotor
phase
voltage
excitation current
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Withdrawn
Application number
EP17720412.0A
Other languages
German (de)
English (en)
Inventor
Martin Bennauer
Kai Brune
Manuel GUTERMUTH
Christian Jäkel
Meinolf Klocke
Mario Koebe
Matthias Kowalski
Christoph Lehmann
Andrey Mashkin
Pascal Piasecki
Marian-Peter Pieczyk
Holger Romanowski
Florian RÖHR
Milan Schmahl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP3443661A1 publication Critical patent/EP3443661A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/42—Arrangements for controlling electric generators for the purpose of obtaining a desired output to obtain desired frequency without varying speed of the generator

Definitions

  • the invention relates to a method for supplying an exciter winding of a rotor of an alternator of a system for generating a three-phase alternating voltage to be fed into a power grid with an exciter current.
  • the invention relates to a method for operating a system for generating a fed into a power supply three-phase AC voltage.
  • the invention relates to a system for generating a three-phase alternating voltage to be fed into a power network, comprising at least one turbine, at least one three-phase generator driven by the turbine and at least one
  • a turbine rotor of the turbine is conventionally rigidly connected to a rotor of the alternator. To obtain a three-phase rotation by rotation of the turbine rotor "
  • the turbine runner must conventionally rotate at an operating frequency of 50 Hz or 60 Hz, respectively, to produce alternating voltage with a standard mains frequency of 50 Hz or 60 Hz with the three-phase generator and to feed it into a power grid.
  • the system When starting up such a system, the system requires a certain time after reaching a synchronous to the mains frequency of the power frequency rotational frequency to compensate for a possible phase shift between the mains frequency and the rotational frequency can. This time is not available for feeding the three-phase change voltage generated by the system into the power grid.
  • the speed of the turbine rotor or the rotor for example, be accelerated to 3000 U / min.
  • this is generated by a direct current designed as a DC excitation current, with which the excitation winding of the rotor is supplied between the rotor and a stator of the alternator, a rotating at 3000 rev / min magnetic field.
  • This magnetic field induces in a stator winding of the stator a three-phase alternating voltage with a frequency corresponding to the respective mains frequency, for example in the amount of 50 Hz.
  • a generator switch can connect the three-phase generator and the power grid.
  • the turbine rotor and the rotor then run synchronously to the power grid.
  • the system picks up load and feeds the three-phase AC voltage into the power grid.
  • the speed of the turbine rotor or of the rotor is adapted to the mains frequency.
  • the system tries here to keep the grid frequency for stabilizing the power grid by countermeasures, in particular by varying the speed.
  • An object of the invention is to increase the load capacity of a system for generating a three-phase alternating voltage to be fed into a power grid.
  • Stator winding an alternating voltage with the mains frequency is induced.
  • a three-phase AC voltage at a frequency corresponding to the mains frequency can already be generated in the stator during a start-up of the system or at an earlier point in time.
  • a synchronization between the three-phase AC voltage and the power grid can take place at a very early point in time during the start-up of the installation, as a result of which the time required for this synchronization can be significantly shortened.
  • the synchronization can thus already take place at a time in which the rotational frequency of the rotor does not correspond to the mains frequency. Consequently, the capacity utilization of the system is thereby significantly increased compared to a conventional system, as described above.
  • the excitation winding can be supplied with a direct current. Due to the previous synchronization, the system can provide electrical power much earlier than a conventional system.
  • a rotational frequency of the rotor for example in the amount of 50 Hz can be formed by a suitable choice of pulsed excitation current rotating at a rotational frequency of 60 Hz magnetic field and rotating at a rotational frequency in the amount of 40 Hz magnetic field.
  • an alternating voltage having a frequency of 60 Hz and an alternating voltage having a frequency of 40 Hz are induced in the stator winding.
  • the 40Hz AC voltage can be filtered out of the three-phase AC voltage generated by the alternator, so that at a machine transformer, via which the alternator is connected to the power grid, a 60Hz three-phase AC voltage is applied to these with the appropriate power to the power grid to be able to make.
  • the pulsed excitation current is generated such that it has a sinusoidal, rectangular, triangular or sawtooth-shaped course over time.
  • the pulsed exciter current can be optimally adapted to the respective application. It may also be possible for the shape of the course of the pulsed exciter current to be varied during a supply of the exciter winding with the pulsed exciter current.
  • Three-phase AC voltage is supplied to a field winding of a rotor of a three-phase generator of the plant using a method according to one of the aforementioned embodiments or any combination of at least two of these embodiments with each other with a pulsed excitation current, wherein voltage components one of
  • Stator winding of the stator generated three-phase AC voltage which differ from the mains frequency, are filtered out of the three-phase AC voltage.
  • the pulsed exciting current also generates an alternating voltage in the stator winding whose frequency corresponds to a difference frequency which corresponds to a subtraction of the frequency of the pulsed exciting current from the rotational frequency of the rotor.
  • This voltage component is filtered out of the three-phase alternating voltage generated by the three-phase generator with suitable means. Alternatively, an otherwise generated voltage component can be filtered out of the three-phase current.
  • the voltage components are preferably filtered out with at least one frequency filter or at least one absorption circuit from the three-phase alternating voltage.
  • the frequency filter may have a series resonant circuit for each phase of the generated three-phase AC voltage.
  • the turbine may be a gas turbine or a steam turbine.
  • the turbine may be a 50Hz or 60Hz gas turbine or a 50Hz or 60Hz steam turbine.
  • the alternator may be formed conventionally.
  • the control and / or regulating unit may be formed by a part of a system electronics or separately.
  • the control and / or regulating unit may comprise a computer unit and a memory unit.
  • the control and / or regulating unit is preferably set up to subtract the rotational frequency from the mains frequency and to define a difference frequency resulting therefrom as a frequency of the pulsed exciter current.
  • the system comprises at least one frequency filter or at least one absorption circuit, with the voltage components of an electrical voltage generated by a stator winding of a stator of the alternator, which differ from the mains frequency, from the electrical voltage
  • Fig. 3 is a schematic cross section of the three-phase alternator shown in Fig. 2.
  • FIG. 1 shows a schematic representation of an exemplary embodiment of a system 1 according to the invention for generating a three-phase AC voltage to be fed into a power network 2.
  • the control and / or regulating unit 5 is set up to supply the exciter winding with a deviation of a rotational frequency of the rotor from a mains frequency of the power network 2 with a pulsed exciter current.
  • the control and / or regulating unit 5 may have a pulsation modulator.
  • the control and / or regulating unit 5 is set up to subtract the rotational frequency from the mains frequency and to determine a consequent difference frequency as a frequency of the pulsed excitation current.
  • the control and / or regulating unit 5 thus generates the pulsed exciting current as a function of this difference frequency.
  • the pulsed excitation current may have a sinusoidal, rectangular, triangular or sawtooth shape over time.
  • the system 1 also includes a frequency filter 7 or at least one absorption circuit, not shown, with the voltage components of a not shown stator of a stator, not shown stator of the alternator 4 generated three-phase alternating voltage, which differ from the mains frequency, can be filtered out of the three-phase AC voltage.
  • FIG. 2 shows a schematic longitudinal section of an alternator 8 of an exemplary embodiment of a system 9 according to the invention.
  • the three-phase generator 8 comprises a stator 10, which has a laminated core not shown in detail and a stator winding, not shown, arranged thereon. Furthermore, the alternator 8 comprises a rotor 11 with a field winding 12, which is supplied with a pulsed excitation current I with a rectangular course over the time t.
  • FIG. 3 shows a schematic cross section of the three-phase generator 8 shown in FIG. 2.
  • the rotor 11 comprises the magnetic poles N (north pole) and S (south pole).
  • the rotational frequencies of the two magnetic rotating fields 13 and 14 may be selected such that a sum of the two rotational frequencies of the respective mains frequency of the power grid, not shown, corresponds.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

L'invention concerne un procédé d'alimentation d'un enroulement d'excitation d'un rotor d'un générateur de courant triphasé d'une installation de génération d'une tension triphasée à céder à un réseau électrique en courant d'excitation. L'enroulement d'excitation en cas d'un écart d'une fréquence de rotation du rotor par une fréquence du réseau électrique par un courant d'excitation pulsé.
EP17720412.0A 2016-05-24 2017-04-21 Procédé d'alimentation d'un enroulement d'excitation d'un rotor en courant d'excitation, procédé de fonctionnement d'une installation de génération d'une tension triphasée, ainsi qu'une installation correspondante Withdrawn EP3443661A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP16170952.2A EP3249802A1 (fr) 2016-05-24 2016-05-24 Procede d'alimentation d'un enroulement inducteur d'un rotor disposant d'un courant d'excitation, procede de fonctionnement d'une installation de production d'une tension triphasee alternative et installation correspondante
PCT/EP2017/059513 WO2017202552A1 (fr) 2016-05-24 2017-04-21 Procédé d'alimentation d'un enroulement d'excitation d'un rotor en courant d'excitation, procédé de fonctionnement d'une installation de génération d'une tension triphasée, ainsi qu'une installation correspondante

Publications (1)

Publication Number Publication Date
EP3443661A1 true EP3443661A1 (fr) 2019-02-20

Family

ID=56098013

Family Applications (2)

Application Number Title Priority Date Filing Date
EP16170952.2A Withdrawn EP3249802A1 (fr) 2016-05-24 2016-05-24 Procede d'alimentation d'un enroulement inducteur d'un rotor disposant d'un courant d'excitation, procede de fonctionnement d'une installation de production d'une tension triphasee alternative et installation correspondante
EP17720412.0A Withdrawn EP3443661A1 (fr) 2016-05-24 2017-04-21 Procédé d'alimentation d'un enroulement d'excitation d'un rotor en courant d'excitation, procédé de fonctionnement d'une installation de génération d'une tension triphasée, ainsi qu'une installation correspondante

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP16170952.2A Withdrawn EP3249802A1 (fr) 2016-05-24 2016-05-24 Procede d'alimentation d'un enroulement inducteur d'un rotor disposant d'un courant d'excitation, procede de fonctionnement d'une installation de production d'une tension triphasee alternative et installation correspondante

Country Status (5)

Country Link
US (1) US20190305705A1 (fr)
EP (2) EP3249802A1 (fr)
JP (1) JP2019517240A (fr)
CN (1) CN109196772A (fr)
WO (1) WO2017202552A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108872856B (zh) * 2018-07-16 2019-04-09 山东固特电气有限公司 发电机转子绕组状态检测装置及方法
US11038450B2 (en) * 2019-05-29 2021-06-15 Hamilton Sundstrand Corporation Systems and methods for predicting the health of integrated drive generators

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1081117B (de) * 1955-04-22 1960-05-05 Sperry Gyroscope Co Ltd Anlage zur Erzeugung eines Wechselstromes konstanter Frequenz
DE1563635A1 (de) * 1966-06-03 1970-06-18 Rheinische Elektro Maschinenfa Synchrongenerator mit drehzahlunabhaengiger Frequenz
DE19533950A1 (de) * 1995-09-14 1997-03-20 Guenter Fella Generator mit Ausgangsspannung konstanter Frequenz
CN201167296Y (zh) * 2007-12-14 2008-12-17 张勇 直驱式交流励磁风力发电机***
GB2485987A (en) * 2010-11-30 2012-06-06 Mitsubishi Heavy Ind Ltd Renewable energy extraction device tolerant of grid failures
CN103259475B (zh) * 2013-04-22 2015-10-21 华中科技大学 基于功率平衡的双馈感应发电机内频率同步方法及装置
US9590550B2 (en) * 2014-01-16 2017-03-07 General Electric Company Systems and methods for adaptive control of excitation and generator systems

Also Published As

Publication number Publication date
JP2019517240A (ja) 2019-06-20
US20190305705A1 (en) 2019-10-03
CN109196772A (zh) 2019-01-11
WO2017202552A1 (fr) 2017-11-30
EP3249802A1 (fr) 2017-11-29

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