EP2893632A2 - Dispositif et procédé pour allonger le temps de déblocage d'un défaut - Google Patents

Dispositif et procédé pour allonger le temps de déblocage d'un défaut

Info

Publication number
EP2893632A2
EP2893632A2 EP13762768.3A EP13762768A EP2893632A2 EP 2893632 A2 EP2893632 A2 EP 2893632A2 EP 13762768 A EP13762768 A EP 13762768A EP 2893632 A2 EP2893632 A2 EP 2893632A2
Authority
EP
European Patent Office
Prior art keywords
electrical loads
transformer
generator
short circuit
electric 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.)
Withdrawn
Application number
EP13762768.3A
Other languages
German (de)
English (en)
Inventor
Martin Hiller
Olaf Michelsson
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 EP2893632A2 publication Critical patent/EP2893632A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/52—Testing for short-circuits, leakage current or ground faults
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/34—Testing dynamo-electric machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/06—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric generators; for synchronous capacitors
    • H02H7/067—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric generators; for synchronous capacitors on occurrence of a load dump
    • 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
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/02—Providing protection against overload without automatic interruption of supply
    • H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
    • H02P29/0241—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being an overvoltage

Definitions

  • the invention relates to a device for extending the time of error clearance and to a method for extending the time of error clearance.
  • the power resynchronization process may take several minutes during which the power plant power to the grid is unavailable. This can lead to network instability especially in the case of failure of larger power plants and in the worst case to a large-scale power failure.
  • a device for extending the error explanation time comprising an electric generator, in particular synchronous generator and electrical loads and a component designed to detect a short circuit ⁇ if, wherein the device is designed such that in case of short circuit, the electrical loads with the electric Generator are connected.
  • the electrical loads are designed as resistors.
  • the ⁇ thanks Ge is followed, to arrange resistors which are short-circuited ⁇ case connected as electrical loads to the electric generator and so as switchable load resistors which dissipate in case of failure to the shaft acceleration contributing Turbi ⁇ nen inconvenience without disconnecting the generator from the grid.
  • the critical fault clearing time is significantly extended ver ⁇ .
  • the device with a transformer which is connected to the electric generator, formed, wherein the electrical loads are arranged parallel to the transformer during the short circuit.
  • the device is designed with electrical loads, wherein the electrical loads are arranged serially to the short circuit path in the transformer star point on the high voltage side.
  • the resulting sudden generator short-circuit is composed of an AC and a DC current component, which decay at different speeds to the stationary short-circuit current according to their time constants.
  • the DC component of the short-circuit current is responsible ⁇ sible that the current path is experiencing a current zero after a few milliseconds. After opening the performance-switch of the switching arc burns until the ⁇ ser first current zero crossing occurs and the arc may be extinguished. During this time, due to the extremely hot arc plasma, the switch experiences considerable contact stress and thermal heat generation. It is therefore desirable that the DC component of the Kurz gleichstro ⁇ mes subsides as soon as possible.
  • the time constant (T) is described by the ratio of the inductance (L) in the short circuit path and the resistance (R) acting in the short circuit path.
  • the formula T L / R makes it clear that the time constant can be lowered with increasing effective resistance. This can be effectively accelerated by switching on the load resistors described here after the fault has occurred.
  • the object is also achieved by a method for increasing the time of error elimination, wherein the electrical generator connected to an electrical consumer network in the short-circuit Final case is interconnected with additional electrical loads.
  • FIG. 2 shows a first embodiment of the invention shown SEN device
  • Figure 3 shows a second embodiment of the erfindungsge ⁇ MAESSEN device.
  • FIG. 2 shows a three-phase electrical generator 5, in particular a synchronous generator, wherein a first phase 6, a second phase 7 and a third phase 8 are formed at the output.
  • the first 6, second 7 and third phases 8 are connected to a transformer 9.
  • the secondary side 10 of the transformer 9 is connected to an electrical network 11.
  • a first drain 12 is provided, to which a first switch 13 and electrical loads 14 are connected to earth 15.
  • the second phase 7 includes a second discharge conduit 16 and connected to the second discharge conduit 16 and a second switch 17 connected to ground 15 load 18.
  • the third stage 8 comprises a third branch 19 and a corresponding drit ⁇ th switch 20 and a Last 21, which in turn is connected to earth 15.
  • the phases 6, 7 and 8 are connected via the generator switch 25 to the transformer 9.
  • FIG. 3 shows an alternative embodiment of the invention.
  • the difference from FIG. 2 is that the loads 14, 18 and 21 are located in series with the short-circuit path in the transformer star point on the high-voltage side. Parallel to the loads 14, 18 and 21, a respective switch 22, 23 and 24 is arranged.
  • the electric generator 5 is driven by a turbine (not shown).
  • the turbine power impressed into the shaft is switched on by the generator 5 via switchable loads 14, 18, 21 until the power returns, and converted into heat.
  • ⁇ impressed on the shaft turbine power is to return from the power generator 5 is electrically removed and converted into heat via switchable loads 14, 18 and 21st
  • the electrical generator 5 with the elekt ⁇ generic network 11 remains connected. A network resynchronization is thus eliminated and it can be achieved a higher power plant availability.
  • the critical for each strand fault clearing time T Ku without additional loads can be general ⁇ my correspond to the following formula to determine analytically:
  • the loads 14, 18 and 21, which may be configured as electrical resistors, perform the turbine power contributing to the shaft acceleration in the event of a fault, thereby significantly increasing the critical fault clearing time and thereby increasing the transient stability of the electric generator 5, in particular synchronous generator in the In the event of a short circuit, load resistors 14, 18 and 21 can be connected.
  • the load resistors 14, 18 and 21 shown in FIG. 2 are connected in parallel to the transformer 9 on the transformer undervoltage side, around the short-circuit residual voltage present in the event of a short-circuit over the transformer longitudinal impedance to use.
  • the additional use of adjustable reactances can even improve the reactivity of the circuit. 2 shows the topology to this first execution ⁇ of the invention.
  • the topology of the second embodiment is shown in FIG.
  • the load resistors 14, 18 and 21 are located in series with the short circuit path in the transformer neutral point on the high voltage side. They are connected by opening the parallel switches 22, 23, 24 in the short circuit.
  • the critical fault clearing time can be significantly increased without constructional changes to ⁇ n ⁇ must make to turbine and generator 5, resulting in a cost measure of the invention shown here.
  • no network separation during the temporary short-circuit is required, so that a permanent availability of the electric generator 5 can be realized without resynchronization.

Landscapes

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

Abstract

L'invention concerne un dispositif pour allonger le temps de déblocage d'un défaut, la puissance de la turbine appliquée à l'arbre étant reprise électriquement, jusqu'au retour du réseau, par le générateur (5) et transformée en chaleur en cas de panne de résistances de charge (14, 18, 21) commutables.
EP13762768.3A 2012-11-30 2013-09-05 Dispositif et procédé pour allonger le temps de déblocage d'un défaut Withdrawn EP2893632A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012221989 2012-11-30
PCT/EP2013/068385 WO2014082766A2 (fr) 2012-11-30 2013-09-05 Dispositif et procédé pour allonger le temps de déblocage d'un défaut

Publications (1)

Publication Number Publication Date
EP2893632A2 true EP2893632A2 (fr) 2015-07-15

Family

ID=49182217

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13762768.3A Withdrawn EP2893632A2 (fr) 2012-11-30 2013-09-05 Dispositif et procédé pour allonger le temps de déblocage d'un défaut

Country Status (5)

Country Link
US (1) US9564750B2 (fr)
EP (1) EP2893632A2 (fr)
JP (1) JP6077131B2 (fr)
CN (1) CN104823375B (fr)
WO (1) WO2014082766A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9698593B2 (en) * 2012-11-20 2017-07-04 Vestas Wind Systems A/S Methods and systems for reducing the impact of a generator short circuit in a wind turbine
EP3271984B1 (fr) * 2015-03-17 2020-05-06 ABB Schweiz AG Système d'excitation avec un dispositif de protection contre un arc electrique
PL3157161T3 (pl) * 2015-10-12 2019-09-30 Siemens Aktiengesellschaft Sposób sterowania instalacją energii wiatrowej
CN107592045B (zh) * 2017-10-31 2024-03-19 江苏瑞昌哥尔德发电设备股份有限公司 一种切换发电机电压输出的接线装置

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DE2115807C3 (de) * 1971-04-01 1974-10-17 Siemens Ag, 1000 Berlin Und 8000 Muenchen Erdschlußschutzeinrichtung für elektrische Geräte mit in Stern geschalteten Wicklungen
NL161628C (nl) * 1974-08-22 1980-02-15 Heemaf Nv Borstelloze draaistroomgenerator met een inrichting voor zelfbekrachtiging en automatische regeling van de bekrachtigingsstroom.
JPS58136299A (ja) 1982-02-05 1983-08-13 Toshiba Corp 超電導発電機の減磁装置
US4511807A (en) * 1982-04-20 1985-04-16 Northern Engineering Industries Plc Electrical generator control system
DE4307268A1 (de) * 1993-03-02 1994-09-08 Siemens Ag Bürstenloser Synchrongenerator
JP2000179446A (ja) * 1998-12-11 2000-06-27 Hiroaki Sano 小型風力発電系統連系システム及びその自動運転用保護装置
DE10134883A1 (de) * 2001-07-18 2003-01-30 Abb Research Ltd Verfahren und Vorrichtung zur drehzahlstellbaren leistungselektronischen Regelung einer getriebelosen Windkraftanlage
JP2003056450A (ja) 2001-08-09 2003-02-26 Kawamura Electric Inc 風力発電設備
JP2003189697A (ja) 2001-12-19 2003-07-04 Kokusan Denki Co Ltd 交流発電機を備えた電源装置
EP1470633A1 (fr) * 2002-01-29 2004-10-27 Vestas Wind System A/S Circuit con u pour etre utilise dans une installation d'energie eolienne
US7015595B2 (en) * 2002-02-11 2006-03-21 Vestas Wind Systems A/S Variable speed wind turbine having a passive grid side rectifier with scalar power control and dependent pitch control
KR101175576B1 (ko) 2004-10-28 2012-08-21 알스톰 테크놀러지 리미티드 발전기용 정적 여자기 시스템, 및 이러한 여자기 시스템의동작을 위한 방법
US7276807B2 (en) 2006-01-19 2007-10-02 General Electric Company Wind turbine dump load system and method
DE102006010537B4 (de) 2006-03-07 2009-06-10 Siemens Ag Dieselelektrisches Antriebssystem mit einem permanent erregten Synchrongenerator
DE102006051546A1 (de) 2006-11-02 2008-05-08 Nordex Energy Gmbh Verfahren zum Betrieb einer Windenergieanlage mit einem doppelt gespeisten Asynchrongenerator sowie Windenergieanlage mit einem doppelt gespeisten Asynchrongenerator
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KR101725551B1 (ko) * 2011-01-14 2017-04-11 매그나칩 반도체 유한회사 백라이트 구동회로 및 이를 적용한 디스플레이 장치
EP2476900A1 (fr) 2011-01-18 2012-07-18 Siemens Aktiengesellschaft Éolienne
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CN102738829B (zh) * 2012-06-30 2015-06-17 广东明阳风电产业集团有限公司 一种变频控制风力发电系统的拓扑结构
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US9698593B2 (en) * 2012-11-20 2017-07-04 Vestas Wind Systems A/S Methods and systems for reducing the impact of a generator short circuit in a wind turbine
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Also Published As

Publication number Publication date
JP6077131B2 (ja) 2017-02-08
JP2015535679A (ja) 2015-12-14
US9564750B2 (en) 2017-02-07
US20150303681A1 (en) 2015-10-22
WO2014082766A3 (fr) 2014-08-14
WO2014082766A2 (fr) 2014-06-05
CN104823375A (zh) 2015-08-05
CN104823375B (zh) 2017-09-12

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