CN202172275U - 谐波在线检测和治理装置 - Google Patents

谐波在线检测和治理装置 Download PDF

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Publication number
CN202172275U
CN202172275U CN2011203052993U CN201120305299U CN202172275U CN 202172275 U CN202172275 U CN 202172275U CN 2011203052993 U CN2011203052993 U CN 2011203052993U CN 201120305299 U CN201120305299 U CN 201120305299U CN 202172275 U CN202172275 U CN 202172275U
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China
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harmonic wave
igbt inverter
treatment device
unit
bus
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孙道军
齐海涛
张连贵
孙新鑫
付振强
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State Grid Corp of China SGCC
State Grid Liaoning Electric Power Co Ltd
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State Grid Liaoning Electric Power Co Ltd
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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

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  • Inverter Devices (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

本实用新型涉及电力系统稳定与控制技术领域,谐波在线检测和治理装置,其特征在于,包括谐波检测单元、IGBT逆变器、微机控制单元和电源变换单元,与三相母线连接的谐波检测单元依次与微机控制单元、电源变换单元、IGBT逆变器相连接。所述IGBT逆变器与母线之间设有可调电抗器。所述谐波检测单元包括补偿电流检测电路、电压检测电路和驱动电路,驱动电路输出端与IGBT逆变器相连。与现有技术相比,本实用新型的有益效果是:1)微机控制单元可按用户负荷性质,选择控制滤波的需求。2)可调电抗器,可按需限制系统的涌流和谐波电流。3)本实用新型只要母线内有电流通过的时候就会工作,不会有滞后的情况。

Description

谐波在线检测和治理装置
技术领域
本实用新型涉及电力系统稳定与控制技术领域,特别是涉及一种谐波在线检测和治理装置。
背景技术
由于电熔镁、铸钢、炼铁等负荷多为冲击性及非线性负荷,其运行的冶炼电弧炉的数量和容量在逐年增多、增大;另外大量新兴电力电子产品的应用,使越来越多的高次谐波注入地区电网,造成电压、电流正弦波形畸变,由于谐波会消耗电能,使电网设备的利用率降低,过负荷、发热甚至烧毁,引起电力系统谐振,严重影响电网辖区内电子设备和保护控制设备的正常工作,给地区电网的安全、优质、经济运行造成潜在的威胁和隐患。
发明内容
本实用新型克服了现有技术中的不足,提供了一种结构设计合理,能有效抑制谐波的谐波在线检测和治理装置。
为实现上述目的,本实用新型通过以下技术方案实现:
谐波在线检测和治理装置,包括谐波检测单元、IGBT逆变器、微机控制单元和电源变换单元,与三相母线连接的谐波检测单元依次与微机控制单元、电源变换单元、IGBT逆变器相连接。
所述IGBT逆变器与母线之间设有可调电抗器。
所述谐波检测单元包括补偿电流检测电路、电压检测电路和驱动电路,驱动电路输出端与IGBT逆变器相连。
与现有技术相比,本实用新型的有益效果是:
1)微机控制单元可按用户负荷性质,选择控制滤波的需求。
2)当母线有电流通过时,谐波检测回路检测电网的功率因数和谐波电流,IGBT逆变器会产生一个大小相等、方向相反的容性电流供给电网,消除谐波。
3)IGBT逆变器与母线间设有可调电抗器,可按需限制系统的涌流和谐波电流。
4)本实用新型只要母线内有电流通过的时候就会工作,不会有滞后的情况。
附图说明
图1是本实用新型的原理框图。
图中:1-谐波检测单元  2-IGBT逆变器  3-微机控制单元  4-电源变换单元  5-母线6-可调电抗器
具体实施方式
下面结合附图对本实用新型的具体实施方式作进一步说明:
见图1,是本实用新型谐波在线检测和治理装置的原理框图,包括谐波检测单元1、IGBT逆变器2、微机控制单元3和电源变换单元4,与三相母线5连接的谐波检测单元1依次与微机控制单元3、电源变换单元4、IGBT逆变器2相连接。IGBT逆变器2与母线5之间设有可调电抗器6,可按需限制系统的涌流和谐波电流。谐波检测单元1包括补偿电流检测电路101、电压检测电路102和驱动电路103,驱动电路103输出驱动IGBT逆变器2。
微机控制单元3通过A/D转换电路根据谐波信号,按需要选择程序对电源变换单元4中的滤波电容输入进行调节,控制驱动电路103输出驱动IGBT逆变器2。
本实用新型通过谐波检测单元1在线检测电网的功率因数和谐波电流,由驱动电路103驱动IGBT逆变器2产生一个大小相等、方向相反的容性电流供给电网,限制或减少谐波电流注入电网,提高辖区电网的安全、优质、经济运行水平。

Claims (3)

1.谐波在线检测和治理装置,其特征在于,包括谐波检测单元、IGBT逆变器、微机控制单元和电源变换单元,与三相母线连接的谐波检测单元依次与微机控制单元、电源变换单元、IGBT逆变器相连接。
2.根据权利要求1所述的谐波在线检测和治理装置,其特征在于,所述IGBT逆变器与母线之间设有可调电抗器。
3.根据权利要求1所述的谐波在线检测和治理装置,其特征在于,所述谐波检测单元包括补偿电流检测电路、电压检测电路和驱动电路,驱动电路输出端与IGBT逆变器相连。
CN2011203052993U 2011-08-19 2011-08-19 谐波在线检测和治理装置 Expired - Fee Related CN202172275U (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106154034A (zh) * 2015-04-14 2016-11-23 艾默生网络能源有限公司 一种功率模块的谐波测量装置和方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106154034A (zh) * 2015-04-14 2016-11-23 艾默生网络能源有限公司 一种功率模块的谐波测量装置和方法
CN106154034B (zh) * 2015-04-14 2019-10-15 维谛技术有限公司 一种功率模块的谐波测量装置和方法

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ASS Succession or assignment of patent right

Owner name: STATE ELECTRIC NET CROP.

Effective date: 20121029

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Effective date of registration: 20121029

Address after: 114002 Anshan South Road, Tiedong District, Liaoning, Shengli Road, No. 33

Patentee after: Anshan Power Supply Company, Liaoning Electric Power Co., Ltd.

Patentee after: State Grid Corporation of China

Address before: 114002 Anshan South Road, Tiedong District, Liaoning, Shengli Road, No. 33

Patentee before: Anshan Power Supply Company, Liaoning Electric Power Co., Ltd.

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120321

Termination date: 20200819