CN112421633A - 降低吸收与并联电容换流变压器五次谐波电流的装置 - Google Patents

降低吸收与并联电容换流变压器五次谐波电流的装置 Download PDF

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CN112421633A
CN112421633A CN202011347735.3A CN202011347735A CN112421633A CN 112421633 A CN112421633 A CN 112421633A CN 202011347735 A CN202011347735 A CN 202011347735A CN 112421633 A CN112421633 A CN 112421633A
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converter
converter transformer
valve
absorption
parallel
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罗隆福
代双寅
赵亮
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Hunan University
Electric Power Research Institute of State Grid Henan Electric Power Co Ltd
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Hunan University
Electric Power Research Institute of State Grid Henan Electric Power Co Ltd
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    • 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
    • H02J3/01—Arrangements for reducing harmonics or ripples
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/33—Arrangements for noise damping
    • 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
    • H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/40—Arrangements for reducing harmonics
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

本发明公开了一种降低吸收与并联电容换流变压器五次谐波电流的装置，包括换流变压器、并联电容器，换流变压器网侧与电力系统交流母线相连，换流变压器阀侧与换流阀连接，所述换流变压器阀侧与换流阀之间设有串联电感，并联电容器并联接入串联电感与换流阀之间。本发明通过在换流变压器阀侧与换流阀之间串入串联电感，起到降低吸收与并联电容HVDC换流变压器五次谐波电流的作用；同时在串联电感与换流阀之间并入角接的并联电容，对换流变压器阀侧谐波进行吸收以及抑制换流变压器的超高电磁噪声，可以有效降低换流变压器阀侧的5次谐波电流，改善换流站变压器阀侧套管与换流变压器绕组应力。

Description

降低吸收与并联电容换流变压器五次谐波电流的装置
技术领域
本发明涉及高压直流输电领域，特别涉及一种降低吸收与并联电容换流变压器五次谐波电流的装置。
背景技术
吸收与并联电容HVDC是一种在常规高压直流输电的基础上，在换流变压器阀侧与换流阀之间并联吸收与并联电容的新型高压直流输电模式，其具有以下特点：1）改善换向，提高换流器可靠性。2）取消BOX-IN，替换现有交流滤波器及无功补偿。3）改善换流变压器和套管的运行环境，提高可靠性：吸收与并联电容有效滤除和吸收了高次谐波电流和谐波电压，改善了换流变压器和套管的电磁环境，从而改善了换流变压器和套管的运行环境，提高了可靠性。4）减少换流变压器的运行损耗: 吸收与并联电容在换流变压器阀侧滤除了7次及以上次谐波电流，仅有少部分谐波电流流经换流变压器，所以，换流变压器的运行损耗减少。5）提高换流变压器容量利用率：吸收与并联电容实现了无功功率的就地补偿，使得无功功率无需从换流变压器经过，故换流变压器可以输送更多的有功，提高了换流变压器的容量利用率。6）适用于现有直流输电，包括柔性交直流输电：吸收与并联电容接线方式十分简单，仅在现有6脉动换流站的基础上，在换流变压器阀侧挂一组三相吸收与并联电容，故其适用于现有直流输电，包括柔性交直流输电。然而，吸收与并联电容HVDC同时存在5次谐波电流放大的缺陷。
发明内容
为了解决上述技术问题，本发明提供一种结构简单、安全可靠的降低吸收与并联电容换流变压器五次谐波电流的装置。
本发明解决上述问题的技术方案是：一种降低吸收与并联电容换流变压器五次谐波电流的装置，包括换流变压器，换流变压器网侧与电力系统交流母线相连，换流变压器阀侧与换流阀连接，所述换流变压器阀侧与换流阀之间设有串联电感。
上述降低吸收与并联电容换流变压器五次谐波电流的装置，还包括并联电容器，并联电容器并联接入串联电感与换流阀之间。
上述降低吸收与并联电容换流变压器五次谐波电流的装置，所述并联电容器采用角接的吸收电容。
本发明的有益效果在于：本发明通过在换流变压器阀侧与换流阀之间串入串联电感，起到降低吸收与并联电容HVDC换流变压器五次谐波电流的作用；同时在串联电感与换流阀之间并入角接的并联电容，对换流变压器阀侧谐波进行吸收以及抑制换流变压器的超高电磁噪声，可以有效降低换流变压器阀侧的5次谐波电流，改善换流站变压器阀侧套管与换流变压器绕组应力。
附图说明
图1为本发明的电路拓扑结构图。
具体实施方式
下面结合附图和实施例对本发明做进一步的说明。
如图1所示，一种降低吸收与并联电容换流变压器五次谐波电流的装置，包括换流变压器1、换流阀2、串联电感3、并联电容器4，换流变压器1网侧与电力系统交流母线相连，换流变压器1阀侧与换流阀2连接，所述换流变压器1阀侧与换流阀2之间设有串联电感3，串联电感3的作用是降低吸收与并联电容HVDC换流变压器五次谐波电流。并联电容器4并联接入串联电感3与换流阀2之间，所述并联电容器4采用角接的吸收电容，并联电容器4的作用是降低换流变压器超高电磁噪声抑制换流阀2产生的高次谐波电压和电流。
本发明的高压直流输电系统的拓扑结构取消了常规高压直流输电系统中的交流场滤波器和无功补偿设备。通过在串联电感3与换流阀2之间并入角接的并联电容，对换流变压器阀侧谐波进行吸收以及抑制换流变压器的超高电磁噪声。同时在换流变压器阀侧与换流阀2之间串入串联电感3，起到降低吸收与并联电容HVDC换流变压器五次谐波电流的作用。

Claims (3)

1.一种降低吸收与并联电容换流变压器五次谐波电流的装置，其特征在于：包括换流变压器，换流变压器网侧与电力系统交流母线相连，换流变压器阀侧与换流阀连接，所述换流变压器阀侧与换流阀之间设有串联电感。
2.根据权利要求1所述的降低吸收与并联电容换流变压器五次谐波电流的装置，其特征在于：还包括并联电容器，并联电容器并联接入串联电感与换流阀之间。
3.根据权利要求2所述的降低吸收与并联电容换流变压器五次谐波电流的装置，其特征在于：所述并联电容器采用角接的吸收电容。
CN202011347735.3A 2020-11-26 2020-11-26 降低吸收与并联电容换流变压器五次谐波电流的装置 Pending CN112421633A (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113030553A (zh) * 2021-05-26 2021-06-25 浙江大学 1%串抗并联电容器谐波放大、过载与匝间短路监测方法

Citations (1)

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Publication number Priority date Publication date Assignee Title
CN106655236A (zh) * 2016-10-18 2017-05-10 湖南大学 采用吸收与并联电容换向的高压直流输电系统

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Publication number Priority date Publication date Assignee Title
CN106655236A (zh) * 2016-10-18 2017-05-10 湖南大学 采用吸收与并联电容换向的高压直流输电系统

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113030553A (zh) * 2021-05-26 2021-06-25 浙江大学 1%串抗并联电容器谐波放大、过载与匝间短路监测方法
CN113030553B (zh) * 2021-05-26 2021-08-24 浙江大学 1%串抗并联电容器谐波放大、过载与匝间短路监测方法

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