WO2023035439A1 - Appareil de traitement d'excitation de sortie de convertisseur connecté au réseau - Google Patents

Appareil de traitement d'excitation de sortie de convertisseur connecté au réseau Download PDF

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Publication number
WO2023035439A1
WO2023035439A1 PCT/CN2021/136189 CN2021136189W WO2023035439A1 WO 2023035439 A1 WO2023035439 A1 WO 2023035439A1 CN 2021136189 W CN2021136189 W CN 2021136189W WO 2023035439 A1 WO2023035439 A1 WO 2023035439A1
Authority
WO
WIPO (PCT)
Prior art keywords
processing device
control switch
electric control
output
normally open
Prior art date
Application number
PCT/CN2021/136189
Other languages
English (en)
Chinese (zh)
Inventor
李小锋
王文才
吴凯
王正云
刘湘
Original Assignee
株洲福德轨道交通研究院有限公司
广东福德电子有限公司
湖南福德电气有限公司
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 株洲福德轨道交通研究院有限公司, 广东福德电子有限公司, 湖南福德电气有限公司 filed Critical 株洲福德轨道交通研究院有限公司
Publication of WO2023035439A1 publication Critical patent/WO2023035439A1/fr

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Classifications

    • 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
    • H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
    • 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
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • 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
    • 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
    • H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
    • H02P9/26—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices
    • H02P9/30—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices using semiconductor devices

Definitions

  • the invention relates to the field of power control and excitation applications, and is mainly used in applications with large excitation transformers or large generators.
  • the grid-connected converter can feed back electric energy to the grid, so it can be used in applications such as energy storage or power stations, and its output end generally has a large transformer or generator.
  • a transformer or generator can be equivalently regarded as a large inductance, which will generate a large induced electromotive force at the moment of output current, and then generate a large excitation current, resulting in magnetic saturation of the transformer or generator.
  • the excitation current can not only cause huge damage to the performance of the transformer or generator, but also have a huge impact on the controllable or uncontrollable converter devices in the front-end grid-connected converter, and even cause damage to the converter devices.
  • the excitation current is fed back to the grid, huge harmonics will also be generated, so it is very important to solve the excitation current problem.
  • the commonly used method adopts the software soft start method, and its control method is very complicated and difficult to implement.
  • the invention adopts an external modular device, which has a simple implementation method, low cost, and is easy to use.
  • the invention provides a processing device for output excitation of a grid-connected converter.
  • a processing device for output excitation of a grid-connected converter includes an input port, an output port, a current limiting resistor R, a timing device T, a normally open electric control switch K, a filter Capacitor C, the input port is respectively connected to the output port through the current limiting resistor R, the normally open electronic control switch K, and the filter capacitor C, and the current limiting resistor R, the normally open electronic control switch K, and the filter capacitor C are three The ones are connected in parallel; the timing device T is used to control the opening and closing of the normally open electric control switch K at regular intervals.
  • the processing device is connected in series on the line between the grid-connected converter and the excitation transformer device, and the excitation transformer device is a transformer or a generator.
  • copper bars are used in the processing device to connect the current transmission lines.
  • the normally open electric control switch K is a normally open contactor or a semi-controlled device.
  • the half-controlled device is an IGBT tube.
  • the timing device T is a time relay.
  • the processing device includes an external interface for externally controlling the on-off of the normally-open electric control switch K.
  • the processing device created by the invention solves the problem of overcurrent caused by magnetic saturation of the output excitation transformer or large generator due to excessive instantaneous output current, has better practical application value, and is simple in structure, low in cost and easy to use .
  • Fig. 1 shows the topological diagram of the processing device created by the present invention
  • Figure 2 shows the main topology of a grid-connected converter with three-phase input and single-phase output
  • Fig. 3 shows the connection mode between the processing device of the present invention and the converter and excitation transformer.
  • the processing device created by the present invention is composed of an input port, an output port, a current limiting resistor R, a timing device T, a normally open electronic control switch K, and a filter capacitor C.
  • the normally open electric control switch K and the filter capacitor C are connected to the output port, in which the current limiting resistor R, the normally open electric control switch K, and the filter capacitor C are connected in parallel, and the timing device T is used for timing control of the normally open electric control switch K performs opening and closing.
  • the normally open electric control switch K is a normally open contactor, which uses a coil to energize to generate a magnetic field to close the contacts, and has its own overload protection function, which can improve the overcurrent protection capability of the processing device.
  • the normally open electronic control switch K is a semi-controlled device such as MOS, IGBT, etc., to realize frequent on-off circuits, wherein the semi-controlled device is preferably an IGBT tube, and its rated current is 4500V/3000A , can work reliably in a high current and high power environment, and comes with an anti-series diode to prevent surges.
  • the semi-controlled device is preferably an IGBT tube, and its rated current is 4500V/3000A , can work reliably in a high current and high power environment, and comes with an anti-series diode to prevent surges.
  • the timing device T is selected as a time relay, which can produce a jumping change in the level and continue to output the level after the jump, which is very suitable for
  • the control of normally open contactor or semi-controlled device simplifies the circuit structure.
  • connection of the current transmission line in the input port, the output port, the current limiting resistor R, the timing device T, the normally open electric control switch K, and the filter capacitor C is realized by copper bars, so that the lines can be Transmission of high currents allows the processing unit to work in applications with large excitation transformers or large generators.
  • the processing device adopts a modular package, which is easy to integrate and use.
  • the processing device is connected in series on the line between the grid-connected converter and the excitation transformer device, wherein the excitation transformer device is a transformer or a generator, when the grid-connected
  • the contactor of the processing device is in an open circuit state, and the output is provided to the excitation transformer device through the device. Due to the existence of the current limiting resistor R and the filter capacitor C, the current output will be limited, and the excitation transformer will not be caused.
  • the voltage device generates excessive induced electromotive force and magnetic saturation occurs. After a certain period of time, the excitation transformer device establishes the excitation, and the time relay automatically turns off when the time comes. The current is directly output to the excitation transformer device through the contactor to ensure normal output.
  • the processing device created by the invention solves the problem of overcurrent caused by magnetic saturation of the output excitation transformer or large generator due to excessive instantaneous output current, has better practical application value, and is simple in structure, low in cost and easy to use .
  • processing device also provides an external interface for externally controlling the on-off of the contactor, and the on-off of the contactor can be forcibly controlled through the interface.

Landscapes

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

Abstract

Le présent modèle d'utilité concerne un appareil de traitement d'excitation de sortie d'un convertisseur connecté au réseau. L'appareil de traitement comprend un orifice d'entrée, un orifice de sortie, une résistance de limitation de courant R, un appareil de temporisation T, un commutateur de commande électrique normalement sous tension K, ainsi qu'un condensateur de filtrage C. L'orifice d'entrée est relié à l'orifice de sortie, séparément par l'intermédiaire de la résistance de limitation de courant R, le commutateur de commande électrique normalement sous tension K et le condensateur de filtrage C, et la résistance de limitation de courant R, le commutateur de commande électrique normalement sous tension K et le condensateur de filtrage C sont connectés en parallèle. L'appareil de temporisation T sert à effectuer une commande de synchronisation sur le commutateur de commande électrique normalement sous tension K, de sorte à l'allumer et l'éteindre. L'appareil de traitement selon le présent modèle d'utilité résout le problème de surintensité causé par la saturation magnétique d'un transformateur d'excitation de sortie ou d'un grand générateur en raison d'un courant de sortie instantané excessif. En outre, ledit appareil de traitement présente une structure simple, est peu coûteux et facile à utiliser.
PCT/CN2021/136189 2021-09-09 2021-12-07 Appareil de traitement d'excitation de sortie de convertisseur connecté au réseau WO2023035439A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202122179931.0 2021-09-09
CN202122179931.0U CN216851804U (zh) 2021-09-09 2021-09-09 一种并网变流器输出励磁的处理装置

Publications (1)

Publication Number Publication Date
WO2023035439A1 true WO2023035439A1 (fr) 2023-03-16

Family

ID=82082776

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/136189 WO2023035439A1 (fr) 2021-09-09 2021-12-07 Appareil de traitement d'excitation de sortie de convertisseur connecté au réseau

Country Status (2)

Country Link
CN (1) CN216851804U (fr)
WO (1) WO2023035439A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5920186A (en) * 1997-05-14 1999-07-06 Sony Corporation In-rush current control circuitry
CN2476093Y (zh) * 2001-04-29 2002-02-06 滕国彤 交流接触器的节能器
CN101534005A (zh) * 2009-04-09 2009-09-16 哈尔滨工业大学 一种上电冲击电流的抑制电路
CN102185543A (zh) * 2010-07-15 2011-09-14 上海海洋大学 一种用于高压异步电动机的节能软起动装置
CN205725554U (zh) * 2016-02-26 2016-11-23 扬州汉龙电气有限公司 基于矩阵变换器的永磁同步电机驱动系统
CN113963990A (zh) * 2021-10-19 2022-01-21 中国电信股份有限公司 一种直流接触器

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5920186A (en) * 1997-05-14 1999-07-06 Sony Corporation In-rush current control circuitry
CN2476093Y (zh) * 2001-04-29 2002-02-06 滕国彤 交流接触器的节能器
CN101534005A (zh) * 2009-04-09 2009-09-16 哈尔滨工业大学 一种上电冲击电流的抑制电路
CN102185543A (zh) * 2010-07-15 2011-09-14 上海海洋大学 一种用于高压异步电动机的节能软起动装置
CN205725554U (zh) * 2016-02-26 2016-11-23 扬州汉龙电气有限公司 基于矩阵变换器的永磁同步电机驱动系统
CN113963990A (zh) * 2021-10-19 2022-01-21 中国电信股份有限公司 一种直流接触器

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