EP0634065A1 - Procede et appareil de demagnetisation de machines synchrones sans balais - Google Patents

Procede et appareil de demagnetisation de machines synchrones sans balais

Info

Publication number
EP0634065A1
EP0634065A1 EP93908222A EP93908222A EP0634065A1 EP 0634065 A1 EP0634065 A1 EP 0634065A1 EP 93908222 A EP93908222 A EP 93908222A EP 93908222 A EP93908222 A EP 93908222A EP 0634065 A1 EP0634065 A1 EP 0634065A1
Authority
EP
European Patent Office
Prior art keywords
thyristor
rotor
field winding
damping resistance
synchronous generator
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.)
Ceased
Application number
EP93908222A
Other languages
German (de)
English (en)
Inventor
Claes Ivarsson
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.)
ABB AB
Original Assignee
Asea Brown Boveri AB
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 Asea Brown Boveri AB filed Critical Asea Brown Boveri AB
Priority to DE9321313U priority Critical patent/DE9321313U1/de
Publication of EP0634065A1 publication Critical patent/EP0634065A1/fr
Ceased 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
    • H02P9/10—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load
    • H02P9/12—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load for demagnetising; for reducing effects of remanence; for preventing pole reversal

Definitions

  • the invention relates to a procedure according to the preamble of claim 1 and an arrangement according to the preamble of claim 5 respectively.
  • a synchronous generator of the normal type can be seen as an assembly of a main device and a supply device.
  • the main device has a three-phase-wound stator which supplies the output power, and a rotor with field windings which are supplied with an adjustable direct current.
  • the supply device is a generator which is intended to produce current for the field windings of the main device's rotor.
  • the supply device is normally an alternating- current device. With non-brushless synchronous generators the alternating-current voltage from the supply device is rectified in a rectifier and the rectified current is fed to the main device's rotor via brushes.
  • the main device's rotor can be supplied with direct current without using brushes in that a co- rotating rectifier rectifies its three-phase current and delivers it to the synchronous generator's rotor.
  • the regulation of the synchronous generator occurs in brushless devices by the current coming from the supply device being regulated by acting on the current in its field winding which is of course stationary.
  • a brushless synchronous generator can in principle be regulated in a completely normal and known manner as far as concerns its normal power regulation of magnitude and phase.
  • Brushless synchronous generators have up to now been used to a limited extent as hydro-electric generators, in particular for large ones, but only rarely as turbo ⁇ generators.
  • the background to why they have received relatively limited application despite obvious advantages has to do with said well-known problems of regulating-down the stator voltage of the synchronous generator, which can be solved far more easily with brush-supplied synchronous generators since fixed regulation devices can then be installed.
  • Known and applied solutions include coupling-in a damping resistance in series, polarity-reversal of the field-winding's current source for coupling-in reversed current and so-called vibration regulators.
  • Recently, controlled thyristor current converters have been used which allow smooth regulation and inversion.
  • the lowering-time can be drastically shortened by the effective time constant in the field circuit being reduced by a factor typically equal to 5.
  • the risk of voltage rise is reduced which, as with e.g. a 400 kV mains, can have serious consequences even with moderate amounts, e.g. 10%.
  • Fig. 1 shows a schematic circuit diagram of a brushless synchronous generator equipped according to the principle of the invention.
  • Fig. 2 shows a generator rotor on the same shaft as a rotor of a supply device.
  • FIG. 1 shows is a schematic representation of a 5 synchronous generator with rotor windings on the same main device and on the supply device mounted on the same shaft (not shown in Fig.l).
  • the main device has a three-phase power winding 1 on its stator and a field winding 2 for direct current on its rotor.
  • the supply device 3 has a
  • a six-pulse rectifier 8 conventionally constructed with semi-conductor diodes is connected to the three-phase winding 4 and supplies a direct current to the field winding 2 during normal operation via a conducting
  • thyristor which can be turned off, preferably a GTO thyristor.
  • a damping resistance 9 is connected in parallel with the thyristor 10.
  • slip-ring arrangement 11 with a slip- ring on the shaft and brush on a brush rocker.
  • Another similar slip-ring arrangement allows the connection with the thyristor's 10 anode and can at the same time possibly perform other functions (not described here) e.g. such as
  • the thyristor 10 should be activated by a turn-on pulse, e.g. via the connections 13 and 14 and the slip-ring 35 arrangements 11 and 12.
  • the thyristor 10 will then be conductive for as long as the field current is fed to the field winding 2. It is also possible to arrange it such that the thyristor 10 is activated by the voltage across the resistance 9, which arises when the excitation voltage starts to be supplied, being made to affect the thyristor (not shown) . Turning-off the thyristor 10 requires that, upon demagnetization, this effect is compensated by a turn- off signal being delivered during the whole process via slip-ring arrangements. The skilled man will appreciate that this can be arranged in many different ways.
  • the arrangement according to the invention does not result in any notable safety problems. If the thyristor 10 becomes unusable, this occurs mainly always in a form that the thyristor is short-circuited and thus uncontrollable, meaning that the method according to the invention can no longer be applied. This does not lead to any catastrophic result.
  • the normal control of the device during operation occurs in a manner well-known to the skilled man via the stationary field winding 5 of the supply device 3, said winding being supplied with a variable direct current from a source 15.
  • the resistance 9 is coupled-in in accordance with the invention, due to a turn- off pulse being supplied via the connections 13 and 14.
  • a damping which is too fast over-voltages can in certain cases occur across the field winding resulting in breakdown.
  • damping resistance so that the impedance or the damping resistance becomes as purely resistive as possible, normally by means of known two-wire (bifilar) winding.
  • GTO thyristors (“Gate Turn Off”) are commercially available components and suitable data is available from the manufacturers, such that it is known for the skilled man how the actual turning-on and turning-off of the thyristor should be effected.
  • the control circuit which should be connected to the terminals 13 and 14 thus requires no further explanation.
  • Fig.2 shows schematically the rotating parts in a synchronous generator with a shaft 20 on which is located a rotor 21 for the actual generator and a rotor 22 for the synchronous generator's supply device.
  • On the shaft 20 there are also slip-rings 23, intended to monitor as well as to turn-off the thyristor 10 shown in Fig.l.
  • the windings 4 according to Fig.l are placed in the rotor 22 whilst the windings 2 are placed in the rotor 21.
  • the resistance 9 and the thyristor 10 can suitably be placed either on the rotor 21 of the main device, e.g. such as at position 24, or on the rotor 22 of the supply device at 24' . In the latter case these components can be suitably mounted together with the rectifier means 8 onto a dynamically well-balanced and centrifugal force- withstanding unit.

Abstract

L'invention concerne un générateur synchrone sans balais dans lequel le bobinage rotorique inducteur (2) du rotor du dispositif principal est alimenté par les bobinages rotoriques (4) du rotor d'une source d'alimentation située sur le même axe, par l'intermédiaire d'un redresseur rotatif. De plus, une résistance d'amortissement est placée dans le circuit d'excitation et raccordée en parallèle à un thyristor blocable (10). L'excitation étant découplée, le thyristor (10) est bloqué par une impulsion de blocage transmise au moyen d'un système à bagues collectrices (11, 12).
EP93908222A 1992-04-02 1993-03-23 Procede et appareil de demagnetisation de machines synchrones sans balais Ceased EP0634065A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE9321313U DE9321313U1 (de) 1993-03-23 1993-03-23 Bürstenloser Synchrongenerator

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9201039A SE500682C2 (sv) 1992-04-02 1992-04-02 Sätt och anordning för avmagnetisering av borstlösa synkrongeneratorer
SE9201039 1992-04-02
PCT/SE1993/000244 WO1993020614A1 (fr) 1992-04-02 1993-03-23 Procede et appareil de demagnetisation de machines synchrones sans balais

Publications (1)

Publication Number Publication Date
EP0634065A1 true EP0634065A1 (fr) 1995-01-18

Family

ID=20385834

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93908222A Ceased EP0634065A1 (fr) 1992-04-02 1993-03-23 Procede et appareil de demagnetisation de machines synchrones sans balais

Country Status (3)

Country Link
EP (1) EP0634065A1 (fr)
SE (1) SE500682C2 (fr)
WO (1) WO1993020614A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102301577B (zh) 2009-01-29 2014-10-01 布鲁萨电子公司 用于单相和三相操作的转换器、直流电压源及电池充电器
ES2325729B2 (es) * 2009-02-19 2010-09-27 Universidad Politecnica De Madrid Sistema de desexcitacion rapida para maquinas sincronas con excitacionindirecta.
KR20120048572A (ko) 2009-06-24 2012-05-15 브루사 일렉트로닉 아게 자동차 배전용 회로장치
CN102714479B (zh) 2010-01-13 2015-09-23 布鲁萨电子公司 用于控制同步电机的他励转子绕组的控制装置和方法
US8693214B2 (en) 2010-06-29 2014-04-08 Brusa Elektronik Ag Voltage converter
RU2505702C2 (ru) * 2011-02-22 2014-01-27 Государственное образовательное учреждение высшего профессионального образования Самарский государственный технический университет Устройство управления углом зажигания для двигателя внутреннего сгорания
US8963476B2 (en) 2011-03-11 2015-02-24 Brusa Elektronik Ag Synchronous machine with switching element in the excitation circuit
UA99548C2 (ru) * 2011-04-07 2012-08-27 Валерий Павлович Гвоздев Устройство гашения магнитного поля при отключении обмотки возбуждения синхроннной машиты от источника питания
EP2587661A1 (fr) * 2011-10-24 2013-05-01 ABB Technology AG Système et procédé de contrôle d'un moteur synchrone
RU191501U1 (ru) * 2019-03-12 2019-08-08 Федеральное государственное автономное образовательное учреждение высшего образования "Южно-Уральский государственный университет (национальный исследовательский университет)" (ФГАОУ ВО "ЮУрГУ (НИУ)") Устройство гашения магнитного поля синхронной машины
CN110932625A (zh) * 2019-11-05 2020-03-27 武汉武水电气技术有限责任公司 一种低压水轮发电机控制装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1763299A1 (de) * 1968-05-02 1971-10-21 Licentia Gmbh Entregungsschaltung fuer buerstenlos ueber rotierende Dioden erregte Synchronmaschinen
DE3406274A1 (de) * 1984-02-17 1985-08-29 Siemens AG, 1000 Berlin und 8000 München Elektrische synchronmaschine, die ueber rotierende gleichrichter erregt wird

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9320614A1 *

Also Published As

Publication number Publication date
SE9201039D0 (sv) 1992-04-02
SE500682C2 (sv) 1994-08-08
WO1993020614A1 (fr) 1993-10-14
SE9201039L (sv) 1993-10-03

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