CN103812110B - 数字滤波空心电力电抗器 - Google Patents

数字滤波空心电力电抗器 Download PDF

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CN103812110B
CN103812110B CN201410084968.7A CN201410084968A CN103812110B CN 103812110 B CN103812110 B CN 103812110B CN 201410084968 A CN201410084968 A CN 201410084968A CN 103812110 B CN103812110 B CN 103812110B
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coil
reactor
harmonic
induction regulation
subharmonic
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CN103812110A (zh
CN103812110B8 (zh
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徐晓东
祝军
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Harbin University of Science and Technology
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/40Arrangements for reducing harmonics

Abstract

本发明涉及一种数字滤波空心电力电抗器。随着电力电子装置在工业领域里的广泛应用,以及电力电容器组在电力系统中的大量使用,带来了电网运行中谐波分量的急剧增加,严重影响了电能质量。本发明组成包括:绕包线圈(1),绕包线圈安装在支撑架(5)上,10%调感线圈(2)也安装在支撑架上,10%调感线圈围绕着绕包线圈,10%调感线圈与IGBT逆变器(3)连接,IGBT逆变器安装在支撑架上,IGBT逆变器通过光纤(6)连接控制器(4),控制器通过光纤与其他次谐波滤波支路逆变器相连。本发明用于在变频器的系统上。

Description

数字滤波空心电力电抗器
技术领域:
本发明涉及一种数字滤波空心电力电抗器。
背景技术:
随着电力电子装置在工业领域里的广泛应用,以及电力电容器组在电力系统中的大量使用, 带来了电网运行中谐波分量的急剧增加,从而严重影响了电能质量,危及工业企业的安全生产和电力部门的有效运营,使得谐波问题备受人们的关注,因此滤除谐波、改善电能质量成为电力部门的重要任务。
谐波是对周期性非正弦电量进行傅立叶级数分解,谐波主要由谐波电流源产生:当正弦基波电压施加于非线性设备时,设备吸收的电流与施加的电压波形不同,电流因而发生了畸变,由于负荷与电网相连,故谐波电流注入到电网中,这些设备就成了电力系统的谐波源。谐波电流和谐波电压分别引起的危害:谐波电压引起的危害:在供电网络阻抗下谐波电流产生叠加在正弦曲线50 赫兹供电网络电压上的谐波电压,从而,供电网络电压畸形。
如果这些谐波分量的其中一个分量接近于一个载波控制频率,可能使载波控制器接收到错误的信号。电压谐波更进一步的影响可能是供电网电压过零点偏离。某些在电压过零点触发的电子设备( 包括功率变换器)的运行可能被严重地干扰。目前谐波与电磁干扰、功率因数降低已并列为电力系统的三大公害。因而了解谐波产生的机理,研究消除供配电系统中的谐波问题对改善供电质量和确保电力系统安全经济运行有着非常积极的意义。在电力系统中对谐波的抑制就是如何减少或消除注入系统的谐波电流,以便把谐波电压控制在限定值之内,抑制谐波电流的工业措施则主要在:在谐波源处吸收谐波电流。
发明内容:
本发明的目的在于提供一种数字滤波空心电力电抗器。
本发明的目的是这样实现的:
一种数字滤波空心电力电抗器,其组成包括:绕包线圈,所述的绕包线圈安装在支撑架上,10%调感线圈安装在所述的支撑架上,所述的10%调感线圈围绕着所述的绕包线圈,所述的10%调感线圈与IGBT逆变器连接,所述的IGBT逆变器安装在所述的支撑架上,所述的IGBT逆变器通过光纤连接控制器,所述的控制器通过所述的光纤与其他次谐波滤波支路逆变器相连。
所述的数字滤波空心电力电抗器,所述的控制器通过检测系统的电流,从而检测出各次谐波电流,然后对各次谐波滤波支路电抗器发出相应PWM信号,控制各个滤波支路的滤波效果。
所述的数字滤波空心电力电抗器,所述的控制器通过检测系统的电流,从而检测出各次谐波电流,然后对x次谐波滤波支路电抗器发出x次PWM信号,该信号由光纤传输至该支路所述的IGBT逆变器,产生Ix电流,Ix与主电流I的x次谐波关系为若令,即阻抗偏差(对于x次谐波)。则通常在±5%以内,因此;只要产生适当的,主电路中就会形成需要的x次谐波I。所述的控制器通过检测系统的电流,从而检测出各次谐波电流,然后对各次谐波滤波支路电抗器发出相应PWM信号,控制滤波支路的滤波效果。
所述的数字滤波空心电力电抗器,主电感L与调感线圈相串联,调感线圈的另一端作为主电抗的另一端,即主电抗由L与调感线圈构成,两者的连接端作为抽头。
有益效果:
1.该电抗器的优点是用约5%的电抗器容量控制该支路的滤波效果,从而降低了有源滤波器的成本,且结合了有源滤波器与无缘滤波器各自的特点,起到了预料不到的显著的无源滤波效果。
附图说明:
附图1是数字滤波空心电力电抗器的结构示意图。
附图2是数字滤波空心电力电抗器电路原理图。
附图3是X次单调谐滤波支路电路图。
具体实施方式:
实施例1:
一种数字滤波空心电力电抗器,其组成包括:绕包线圈1,所述的绕包线圈安装在支撑架5上,10%调感线圈也安装在所述的支撑架上,所述的10%调感线圈围绕着所述的绕包线圈,所述的10%调感线圈与IGBT逆变器2连接,所述的IGBT逆变器3安装在所述的支撑架上,所述的IGBT逆变器通过光纤6连接控制器4,所述的控制器通过所述的光纤与其他次谐波滤波支路逆变器相连。
实施例2:
根据实施例1所述的数字滤波空心电力电抗器,在X次单调谐滤波支路,其中,L为滤波电抗器,C为滤波电容器,所述的控制器通过检测系统的电流,从而检测出各次谐波电流,然后对x次谐波滤波支路电抗器发出x次PWM信号,该信号由光纤传输至该支路所述的IGBT逆变器,产生Ix电流,Ix与主电流I的x次谐波关系为若令,即阻抗偏差(对于x次谐波)。则通常在±5%以内,因此;公式也说明只要产生适当的,主电路中就会形成需要的x次谐波I。
实施例3:
根据实施例1所述的数字滤波空心电力电抗器,所述的控制器通过检测系统的电流,从而检测出各次谐波电流,然后对各次谐波滤波支路电抗器发出相应PWM信号,控制各个滤波支路的滤波效果。
实施例4:
根据实施例1所述的数字滤波空心电力电抗器,主电感L与调感线圈相串联,调感线圈的另一端作为主电抗的另一端,即主电抗由L与调感线圈构成,两者的连接端作为抽头。实现上述两种电抗器连接方式均不需要更改滤波空抗的设计与结构。

Claims (1)

1.一种数字滤波空心电力电抗器,其组成包括:绕包线圈,其特征是:所述的绕包线圈安装在支撑架上,10% 调感线圈也安装在所述的支撑架上,所述的10% 调感线圈围绕着所述的绕包线圈,所述的10%调感线圈与IGBT 逆变器连接,所述的IGBT 逆变器安装在所述的支撑架上,所述的IGBT 逆变器通过光纤连接控制器,所述的控制器通过所述的光纤与其他次谐波滤波支路逆变器相连;
所述的控制器通过检测系统的电流,从而检测出各次谐波电流,然后对各次谐波滤波支路电抗器发出相应PWM信号,控制各个滤波支路的滤波效果;
所述的控制器通过检测系统的电流,从而检测出各次谐波电流,然后对次谐波滤波支路电抗器发出次PWM信号,该信号由光纤传输至该支路所述的IGBT 逆变器,产生电流,与主电流的次谐波关系为:
若令,即阻抗偏差, 对于次谐波
在±5%以内;因此,只要产生适当的,主电路中就会形成需要的次谐波,所述的控制器通过检测系统的电流,从而检测出各次谐波电流,然后对各次谐波滤波支路电抗器发出相应PWM 信号,控制滤波支路的滤波效果;
主电感L 与调感线圈相串联,调感线圈的另一端作为主电抗的另一端,即主电抗由主电感L 与调感线圈构成,两者的连接端作为抽头;
电抗器是用5% 的电抗器容量控制该支路的滤波效果。
CN201410084968.7A 2014-03-10 2014-03-10 数字滤波空心电力电抗器 Expired - Fee Related CN103812110B8 (zh)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2716988Y (zh) * 2004-06-23 2005-08-10 青岛恒顺电器有限公司 干式空心连续可调滤波电抗器
CN201290008Y (zh) * 2008-11-18 2009-08-12 南京同步科技有限公司 多功率单元并联式有源电力滤波器
CN202373976U (zh) * 2011-12-13 2012-08-08 上海韦欧韦滤波设备有限公司 有源滤波装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030160515A1 (en) * 2002-01-15 2003-08-28 Luke Yu Controllable broad-spectrum harmonic filter (cbf) for electrical power systems

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2716988Y (zh) * 2004-06-23 2005-08-10 青岛恒顺电器有限公司 干式空心连续可调滤波电抗器
CN201290008Y (zh) * 2008-11-18 2009-08-12 南京同步科技有限公司 多功率单元并联式有源电力滤波器
CN202373976U (zh) * 2011-12-13 2012-08-08 上海韦欧韦滤波设备有限公司 有源滤波装置

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