CN202014096U - 一种光伏并网逆变器的吸收和补偿装置 - Google Patents

一种光伏并网逆变器的吸收和补偿装置 Download PDF

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CN202014096U
CN202014096U CN2011201031846U CN201120103184U CN202014096U CN 202014096 U CN202014096 U CN 202014096U CN 2011201031846 U CN2011201031846 U CN 2011201031846U CN 201120103184 U CN201120103184 U CN 201120103184U CN 202014096 U CN202014096 U CN 202014096U
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absorption
filter
emi
electrical network
compensation device
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郭俊伟
汪小伟
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Henan Tianchuang New Energy Equipment Co.,Ltd.
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HENAN TIANCHUANG WINDPOWER EQUIPMENT CO Ltd
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    • 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
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers
    • 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

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Abstract

本实用新型提供一种光伏并网逆变器的吸收和补偿装置，和电网相连接，包括依次串联的断路器、直流滤波器（EMI）、逆变器模块、升压变压器、滤波电抗器、交流滤波器（EMI）其特征在于滤波电抗器和交流滤波器（EMI）之间还接入电容器组，所述的电容器组组成星形电路，每个支路设置一个电容器，所述的断路器为直流断路器，所述的逆变器模块为三相IGBT功率模块。本实用新型的装置大降低了电路中谐波对电网的影响，避免造成电网电压的波动，保证并网后的电网质量，星形接线的电容器组结构简单、经济实用。

Description

一种光伏并网逆变器的吸收和补偿装置
技术领域
本实用新型涉及一种光伏并网逆变器的吸收和补偿装置，属于光伏发电并网技术领域。
背景技术
随着人类社会的发展，能源、环境成为当今人类生存和发展所要解决的紧迫问题，低碳经济已经成为全球经济发展的大势所趋，太阳能发电以其清洁、安装区域广、有望实现平价上网而成为最具前景的新能源,随着太阳能光伏发电产业规模的不断扩大，光伏逆变器市场将迎来良好发展机遇。。
随着光伏发电电量在电网比例的增加，并网的光伏逆变器，如30KW光伏并网逆变器使用许多电子元件，在逆变器将直流转换为交流的过程中，不可避免地会产生谐波、三相电流不平衡，输出功率不确定性易造成电网电压波动、闪变，由于30KW光伏并网逆变器发电电流较小，以前人们往往都忽略了谐波的影响，但是这样谐波电流全部注入到了电网，同样会造成电网电压的波动，影响并网后的电网质量。
发明内容
本实用新型的目的在于提供一种光伏并网逆变器的吸收和补偿装置，可以滤除谐波，避免造成电网电压的波动，保证并网后的电网质量。
为了实现上述目的，本实用新型的方案是：一种光伏并网逆变器的吸收和补偿装置，包括依次串联的断路器、直流滤波器（EMI）、逆变器模块、升压变压器、滤波电抗器、交流滤波器（EMI），所述的滤波电抗器和交流滤波器（EMI）之间还接入电容器组，电容器组为电容器组成的星形电路，每个支路设置一个电容器。
进一步，所述的断路器为直流断路器。
进一步，所述的逆变器模块为三相IGBT功率模块。
本实用新型的有益效果是：所述的断路器通过开合来控制太阳能电池板与电路的连接，所述的直流滤波器对光伏电流进行滤波，所述的逆变器模块对光伏电流逆变，发出交流电，所述的升压变压器来升高逆变后的电流电压，所述的交流滤波器（EMI）对交流电进行滤波，所述的电容器组对电路中的高次谐滤进行过滤。本实用新型的装置大降低了电路中谐波对电网的影响，避免造成电网电压的波动，保证并网后的电网质量，星形接线的电容器组结构简单、经济实用。
附图说明
图1为本实用新型的电路原理图。
具体实施方式
下面结合附图及具体实施方式对本实用新型作进一步说明。
由图1知，本实用新型的一种光伏并网逆变器的吸收和补偿装置，和电网10相连接，其装置包括依次串联的断路器1、直流滤波器（EMI）2、逆变器模块3、升压变压器4、滤波电抗器5、交流滤波器（EMI）7，所述的滤波电抗器5和交流滤波器（EMI）7之间还接入电容器组6，电容器组6为电容器组成的星形电路，每个支路设置一个电容器，断路器1为直流断路器，逆变器模块3为三相IGBT功率模块。
本实用新型的装置通过直流断路器1来控制分合光伏电流，直流（EMI）2来对光伏电流进行滤波，来达到光伏电流波形的平稳，这样流入三相IGBT功率模块3的波形就比较平稳不至于损坏功率器件。三相IGBT功率模块为逆变器3，经过逆变器3发出交流电压和电流时，也伴随着谐波的产生，这时需滤波电抗器5来对电压和电流进行滤波，再加上星型电容器组6，使逆变器3发出的电能质量提高，再加上交流（EMI）7防止电磁干扰提高系统的抗干扰性能。

Claims (3)

1.一种光伏并网逆变器的吸收和补偿装置，包括依次串联的断路器、直流滤波器（EMI）、逆变器模块、升压变压器、滤波电抗器、交流滤波器（EMI），其特征在于滤波电抗器和交流滤波器（EMI）之间还接入电容器组，所述的电容器组组成星形电路，每个支路设置一个电容器。
2. 根据权利要求1所述的光伏并网逆变器的吸收和补偿装置，其特征在于：所述的断路器为直流断路器。
3.根据权利要求1所述的光伏并网逆变器的吸收和补偿装置，其特征在于：所述的逆变器模块为三相IGBT功率模块。
CN2011201031846U 2011-04-11 2011-04-11 一种光伏并网逆变器的吸收和补偿装置 Expired - Fee Related CN202014096U (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3780308A4 (en) * 2018-04-28 2021-04-28 Huawei Technologies Co., Ltd. INVERTER, GENERATING SYSTEM AND METHOD FOR SUPPRESSING HARMONIC DISTORTION

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3780308A4 (en) * 2018-04-28 2021-04-28 Huawei Technologies Co., Ltd. INVERTER, GENERATING SYSTEM AND METHOD FOR SUPPRESSING HARMONIC DISTORTION
US11336094B2 (en) 2018-04-28 2022-05-17 Huawei Technologies Co., Ltd. Inverter, power generating system, and method for suppressing harmonic distortion of alternating current system

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