WO2012171995A1 - Dispositif de dérivation rapide - Google Patents

Dispositif de dérivation rapide Download PDF

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Publication number
WO2012171995A1
WO2012171995A1 PCT/EP2012/061287 EP2012061287W WO2012171995A1 WO 2012171995 A1 WO2012171995 A1 WO 2012171995A1 EP 2012061287 W EP2012061287 W EP 2012061287W WO 2012171995 A1 WO2012171995 A1 WO 2012171995A1
Authority
WO
WIPO (PCT)
Prior art keywords
parallel
protection switch
backup protection
bps
bypass device
Prior art date
Application number
PCT/EP2012/061287
Other languages
English (en)
Inventor
Andreas Philipp
Ying Hua Song
Xue Zhi Wu
Ji Long Yao
Yan Feng Zhao
Original Assignee
Siemens Aktiengesellschaft
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 Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2012171995A1 publication Critical patent/WO2012171995A1/fr

Links

Classifications

    • 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
    • H02H7/22—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 distribution gear, e.g. bus-bar systems; for switching devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/06—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters

Definitions

  • the present invention relates to a fast bypass device, in particular to a fast bypass device for a direct current iso ⁇ lation device.
  • HVDC High Voltage Direct Current
  • a capacitor can block direct current while allowing the passage of alternating current.
  • a fast bypass device in parallel, to short-circuit the capacitor in the event of an electrical system fault or a power surge in the transformer, in order to prevent the voltage or current from exceeding the limit of the capacitor.
  • Thyristors have been used in fast bypass devices on account of having good current control capability and a fast re ⁇ sponse.
  • Reverse-parallel-connected thyristors are widely em ⁇ ployed as they can allow current to flow in both directions.
  • An electronic drive circuit is generally used to actively in ⁇ ject a certain current into the gate of a thyristor and thereby achieve triggering of the thyristor.
  • safety and reliability are of the utmost importance for a device which blocks direct current in an electrical system, it is necessary to additionally install a pair of thyristors and a complementary electronic drive circuit to serve as a backup protection device.
  • the bypass function can be jointly borne by the two pairs of thyristors during normal operation. If one of the pairs develops a fault, the other pair can still achieve the bypass function alone.
  • a backup protection device requires a pair of thyristors and a complementary electronic drive circuit to be additionally provided, resulting in greatly increased costs; 2) the backup protection device must operate in an active way, i.e. trig ⁇ gering may only be performed when the power source is working normally. If the power source should suffer paralysis as a result of a serious fault, triggering will be unable to be carried out.
  • Another existing solution is to employ a me- chanical switch (for example a contactor) and a lightning arrester at the same time to serve as a backup protection de ⁇ vice, but since the reaction time of a mechanical switch is long, generally several tens of milliseconds, it may be un ⁇ able to meet the requirements for protecting the main capaci- tor, and also has a relatively high cost.
  • a me- chanical switch for example a contactor
  • a lightning arrester at the same time to serve as a backup protection de ⁇ vice, but since the reaction time of a mechanical switch is long, generally several tens of milliseconds, it may be un ⁇ able to meet the requirements for protecting the main capaci- tor, and also has a relatively high cost.
  • the object of the present invention is to provide a fast by- pass device which is capable of protecting a main capacitor effectively and overcoming the above shortcomings in the prior art.
  • the fast bypass device of the present invention comprises a pair of reverse-parallel-connected thyristors, a lightning arrester and a backup protection switch, wherein the pair of reverse-parallel-connected thyristors, the lightning arrester and the backup protection switch are connected in parallel with each other.
  • the backup protection switch comprises a triggering circuit.
  • the triggering circuit comprises a single-phase bridge rectifier cir- cuit, a second resistance, a breakover diode, and a pulse transformer with a first winding and a second winding, wherein the second resistance, the breakover diode and the first winding are connected in series with the output ends of the single-phase bridge rectifier circuit to form a loop, the input ends of the single-phase bridge rectifier circuit are connected in parallel with the backup protection switch, and the second winding is connected to a triggering pole of the backup protection switch.
  • the output ends of the single-phase bridge rectifier circuit are connected in parallel with a capacitor.
  • the thyristors are connected in parallel with a main capacitor.
  • the input ends of the single-phase bridge rectifier circuit are connected in parallel with the backup protection switch via a first resistance.
  • the main capacitor is one or more capacitances connected in se ⁇ ries between the neutral point and grounding electrode of a transformer.
  • the advantages of the present invention are: 1) it avoids the additional provision of a pair of thyristors and complemen- tary electronic drive circuit, thereby reducing costs; 2) it operates in a passive way, and is not restricted by whether or not the power supply is working normally; 3) since the backup protection switch is capable of closing within 1 mil- lisecond of a fault occurring, and the load through the lightning arrester before closing is limited, faster and more reliable protection of the main capacitor can be realized; moreover, a lower load allows a smaller lightning arrester to be selected for use, saving space and further reducing costs.
  • Fig. 1 illustratively shows a fast bypass circuit 1 of the present invention connected in parallel with a main capacitor C m , in which electric potential points with the same labels are at the same potential;
  • Fig. 2 illustratively shows a triggering circuit 2 for a backup protection switch BPS.
  • SA lightning arrester ; backup protection switch; BOD breakover diode; pulse transformer;
  • the fast bypass device 1 as shown by the dashed line in Fig. 1 com ⁇ prises a pair of reverse-parallel-connected thyristors Tl and T2, a lightning arrester SA and a backup protection switch BPS, wherein the reverse-parallel-connected thyristors Tl and T2, the lightning arrester SA and the backup protection switch BPS are connected in parallel with each other between the electric potential points P3 and P4.
  • the backup protec ⁇ tion switch BPS has a good capacity for sustaining strong currents, and is capable of closing within 1 millisecond of a fault occurring.
  • the backup protection switch BPS may be obtained from amongst products such as the Siemens HVDC PLUS® and SVC PLUS®.
  • the lightning arrester SA can be made to conduct within a few microseconds to short-circuit the main capacitor C m .
  • the backup protection switch BPS closes within 1 millisecond of the oc ⁇ currence of the fault, to short-circuit the main capacitor C m and at the same time remove the load on the lightning ar ⁇ rester SA.
  • the backup protection switch BPS is capable of sustaining a far higher load than the lightning arrester SA; the present invention is able to protect the lightning arrester SA from damage caused by an excessive load by way of the backup protection switch BPS, while ensuring rapid short- circuiting of the main capacitor C m by way of the lightning arrester SA.
  • the backup protection switch BPS further comprises a triggering circuit 2 as shown in Fig. 2.
  • the triggering circuit 2 comprises a single-phase bridge rectifier circuit RC, a resis ⁇ tance R2 serving as a second resistance, a breakover diode BOD, and a pulse transformer PT with a winding Wl serving as a first winding and a winding W2 serving as a second winding, wherein the resistance R2, the breakover diode BOD and the winding Wl are connected in series with the output ends of the single-phase bridge rectifier circuit RC to form a loop, and the input ends of the single-phase bridge rectifier cir ⁇ cuit RC are connected in parallel with the backup protection switch BPS at the electric potential points P3 and P4.
  • the winding W2 is connected to a triggering pole (not shown) of the backup protection switch BPS at the electric potential points P5 and P6.
  • the triggering circuit 2 will receive a fault signal through the electric potential points P3 and P4, which is rectified by way of the single-phase bridge rectifier circuit RC . If the rectified signal reaches the voltage level defined by the breakover diode BOD, a current will be produced in the winding Wl, so that a current is produced in the winding W2 of the pulse transformer PT to trigger the backup protection switch BPS; here, the second resistance serves to limit the current .
  • the output ends of the single-phase bridge rectifier circuit RC are con- nected in parallel with a capacitor C at the electric poten ⁇ tial points P7 and P8, and/or the single-phase bridge recti ⁇ fier circuit RC is connected in parallel with the backup pro ⁇ tection switch BPS via a resistance Rl serving as a first re ⁇ sistance, i.e. the resistance Rl is connected between the electric potential point P3 and an input end of the single- phase bridge rectifier circuit RC .
  • the capacitor C is used to suppress peaks while the first resistance is used to limit the current.
  • the fast bypass device 1 may be further connected in parallel with a main capacitor C m as shown in Fig. 1.
  • the main capacitor C m connected between the neutral point PI and grounding electrode P2 of a transformer is connected in parallel with the reverse-parallel-connected thyristors Tl and T2 in the fast bypass circuit 1 at the electric potential points P3 and P4, wherein the main capacitor C m can be one or more capacitances connected in series between the neutral point PI and grounding electrode P2 of the transformer.

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  • Rectifiers (AREA)

Abstract

L'invention concerne un dispositif de dérivation rapide (1) comportant une paire de thyristors (T1, T2) reliés en inverse parallèle, un parafoudre (SA) et un commutateur de protection de sauvegarde (BPS), la paire de thyristors (T1, T2) reliés en inverse parallèle, le parafoudre (SA) et le commutateur de protection de sauvegarde (BPS) étant reliés en parallèle. Les avantages de l'invention sont les suivants: 1) le dispositif ne nécessite par la fourniture supplémentaire d'une paire de thyristors et d'un circuit d'attaque électronique complémentaire, de manière à réduire les coûts; 2) le dispositif fonctionne de manière passive et n'est pas limité par le fonctionnement normal ou non de l'alimentation électrique; 3) comme le commutateur de protection de sauvegarde est capable de se fermer en une milliseconde après apparition d'un défaut, et la charge à travers le parafoudre est limitée avant fermeture, une protection plus rapide et plus efficace du condensateur principal est possible; par ailleurs, une charge inférieure permet d'employer un parafoudre de taille inférieure de manière à réduire l'encombrement et les coûts.
PCT/EP2012/061287 2011-06-15 2012-06-14 Dispositif de dérivation rapide WO2012171995A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2011101611437A CN102832607A (zh) 2011-06-15 2011-06-15 一种快速旁路装置
CN201110161143.7 2011-06-15

Publications (1)

Publication Number Publication Date
WO2012171995A1 true WO2012171995A1 (fr) 2012-12-20

Family

ID=46384348

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/061287 WO2012171995A1 (fr) 2011-06-15 2012-06-14 Dispositif de dérivation rapide

Country Status (2)

Country Link
CN (1) CN102832607A (fr)
WO (1) WO2012171995A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103176117A (zh) * 2013-02-27 2013-06-26 国网智能电网研究院 一种基于半波法的大功率晶闸管关断特性测试装置
US9178349B2 (en) 2013-09-11 2015-11-03 General Electric Company Method and system for architecture, control, and protection systems of modular stacked direct current subsea power system
US20180145504A1 (en) * 2015-04-23 2018-05-24 New York University Reduction of geomagnetically induced currents
CN110544930A (zh) * 2019-10-18 2019-12-06 云南电网有限责任公司电力科学研究院 一种基于电容电流的电压跌落调整系统及方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104360180B (zh) * 2014-06-26 2017-12-26 许继集团有限公司 一种换流变压器直流偏磁抑制试验装置及试验方法
CN106849634A (zh) * 2017-03-14 2017-06-13 特变电工新疆新能源股份有限公司 一种旁路电路

Citations (2)

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Publication number Priority date Publication date Assignee Title
US6075378A (en) * 1997-06-24 2000-06-13 Jeol Ltd. Electrical energy storage capacitor power supply capable of shorting out defective capacitors
DE102009043229A1 (de) * 2009-09-28 2011-03-31 Siemens Aktiengesellschaft Vorrichtung zum Kurzschließen

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CN2847637Y (zh) * 2005-11-18 2006-12-13 中国电力科学研究院 一种电容法抑制变压器中性点直流电流的装置
CN100517897C (zh) * 2006-11-24 2009-07-22 华中科技大学 接地变压器中性点直流电流抑制装置
CN201118203Y (zh) * 2007-11-15 2008-09-17 上海市电力公司超高压输变电公司 一种抑制直流偏磁引起变压器噪音的装置
CN101207273B (zh) * 2007-11-15 2011-04-20 上海市电力公司超高压输变电公司 一种抑制直流偏磁引起变压器噪音的方法
CN201199633Y (zh) * 2008-04-17 2009-02-25 武汉华瑞防雷科技股份有限公司 中性点大电流接地直流隔离控制柜
CN201584755U (zh) * 2009-11-26 2010-09-15 广州市高澜水技术有限公司 一种用于变压器中性点隔直流设备的电流合闸装置
CN201584906U (zh) * 2009-11-26 2010-09-15 广州市高澜水技术有限公司 一种用于变压器中性点隔直装置中的晶闸管触发电路

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6075378A (en) * 1997-06-24 2000-06-13 Jeol Ltd. Electrical energy storage capacitor power supply capable of shorting out defective capacitors
DE102009043229A1 (de) * 2009-09-28 2011-03-31 Siemens Aktiengesellschaft Vorrichtung zum Kurzschließen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103176117A (zh) * 2013-02-27 2013-06-26 国网智能电网研究院 一种基于半波法的大功率晶闸管关断特性测试装置
US9178349B2 (en) 2013-09-11 2015-11-03 General Electric Company Method and system for architecture, control, and protection systems of modular stacked direct current subsea power system
US20180145504A1 (en) * 2015-04-23 2018-05-24 New York University Reduction of geomagnetically induced currents
US10971922B2 (en) * 2015-04-23 2021-04-06 New York University Reduction of geomagnetically induced currents by neutral switching
CN110544930A (zh) * 2019-10-18 2019-12-06 云南电网有限责任公司电力科学研究院 一种基于电容电流的电压跌落调整系统及方法
CN110544930B (zh) * 2019-10-18 2022-09-02 云南电网有限责任公司电力科学研究院 一种基于电容电流的电压跌落调整系统及方法

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