CN105337508A - 一种用于电抗器匝间绝缘测试装置 - Google Patents

一种用于电抗器匝间绝缘测试装置 Download PDF

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CN105337508A
CN105337508A CN201510791199.9A CN201510791199A CN105337508A CN 105337508 A CN105337508 A CN 105337508A CN 201510791199 A CN201510791199 A CN 201510791199A CN 105337508 A CN105337508 A CN 105337508A
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transistor
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electric capacity
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朱东柏
徐晓东
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Harbin University of Science and Technology
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
    • H02M5/44Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
    • H02M5/453Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/458Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/1227Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
    • G01R31/1263Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
    • G01R31/1272Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/1227Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
    • G01R31/1263Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
    • G01R31/129Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of components or parts made of semiconducting materials; of LV components or parts

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Testing Relating To Insulation (AREA)

Abstract

本发明涉及一种用于电抗器匝间绝缘测试装置,包括三相调压器、整流电路、逆变电路、RLC滤波电路、高频变压器T和测试电路,所述逆变电路包括绝缘栅极型晶体管G1、G2、G3、G4和电容C1,所述整流电路的输入端与三相调压器的输出端相连,其输出端经逆变电路与RLC滤波电路的输入端相连,RLC滤波电路与变压器T的输入端相连,变压器T的输出端与测试电路的输入端相连。本发明能够自由输出任意频率的交流电,使被测试的电抗器和与其并联的电容达到谐振频率,再通过高频变压器给电抗器两端提供所需的测试电压,并使得整个装置能够安全,可靠的运行。

Description

一种用于电抗器匝间绝缘测试装置
技术领域
本发明涉及电抗器测量技术领域,具体涉及一种用于电抗器匝间绝缘测试装置。
背景技术
无论是铁心电抗器还是空心电抗器,在其运行过程中,都可能由于匝间短路导致电抗器烧毁,从而影响电力系统的稳定运行,因此,电力电抗器生产厂家在提高电抗器线圈质量、改进包封工艺、增强结构绝缘的同时,还应具有验证电抗器是否存在匝间绝缘缺陷的出厂检验能力。传统的电抗器匝间绝缘测试装置主要是针对空心电抗器,以脉冲震荡的方式,通过点火控制器的控制,让球隙向电抗器线圈放电,由于点火控制器点火时间的不精确性,很难保证施加在电抗器两端的试验电压精确度,与此同时,在放电过程中对球隙表面的烧蚀也会对装置的寿命造成影响。目前,国内具有空心电抗器匝间绝缘测试能力的电抗器厂家相对较少,而且铁心电抗器做匝间绝缘试验的技术水平非常有限。
发明内容
本发明的目的在于提供一种用于电抗器匝间绝缘测试装置,能够自由输出任意频率的交流电,使被测试的电抗器和与其并联的电容达到谐振频率,再通过高频变压器给电抗器两端提供所需的测试电压,并使得整个装置能够安全,可靠的运行。
为实现上述目的,本发明采用了以下技术方案:包括三相调压器、整流电路、逆变电路、RLC滤波电路、高频变压器T和测试电路,所述逆变电路包括绝缘栅极型晶体管G1、G2、G3、G4和电容C1,所述晶体管G1和晶体管G2的发射极相连,晶体管G1、G2集电极分别与晶体管G3、G4的发射极相连,所述晶体管G3、G4的集电极以及晶体管G1、G2的发射极分别与电容C1的两端相连,所述电容C1的两端与整流电路的输出端相连,所述整流电路的输入端与三相调压器的输出端相连,所述晶体管G1的集电极和晶体管G2的集电极经RLC滤波电路与高频变压器T的输入端相连,变压器T的输出端与测试电路的输入端相连。
所述RLC滤波电路由电感L1、电阻R1和电容C2组成,所述电感L1的一端与晶体管G1的集电极相连,其另一端依次经电阻R1和电容C2与晶体管G2的集电极相连,所述电阻R1与电容C2串联后并联在变压器T的输入端。
所述整流电路由二极管V1、V2、V3、V4、V5和V6组成,所述二极管V1、V2和V3的阴极与晶体管G3、G4的集电极相连,其阳极分别与二极管V4、V5和V6的阴极相连,二极管V4、V5和V6的阳极与晶体管G1、G2的发射极相连。
所述测试电路包括被测电抗器L2及并联在被测电抗器L2两端的电容C3,所述电容C3的两端与变压器T的输出端相连。
由上述技术方案可知,本发明所述的用于电抗器匝间绝缘测试装置,电路结构简单,测试方便,能够自由输出任意频率的交流电,使被测试的电抗器和与其并联的电容达到谐振频率,再通过高频变压器给电抗器两端提供所需的测试电压,并使得整个装置能够安全,可靠的运行。
附图说明
图1是本发明的电路图。
具体实施方式
下面结合附图对本发明做进一步说明:
如图1所示,本实施例的用于电抗器匝间绝缘测试装置,包括三相调压器、整流电路1、逆变电路2、RLC滤波电路3、高频变压器T和测试电路4,逆变电路2包括绝缘栅极型晶体管G1、G2、G3、G4和电容C1,晶体管G1和晶体管G2的发射极相连,晶体管G1、G2集电极分别与晶体管G3、G4的发射极相连,晶体管G3、G4的集电极以及晶体管G1、G2的发射极分别与电容C1的两端相连,电容C1的两端与整流电路1的输出端相连,整流电路1的输入端与三相调压器的输出端相连,晶体管G1的集电极和晶体管G2的集电极经RLC滤波电路3与高频变压器T的输入端相连,变压器T的输出端与测试电路4的输入端相连。
RLC滤波电路3由电感L1、电阻R1和电容C2组成,电感L1的一端与晶体管G1的集电极相连,其另一端依次经电阻R1和电容C2与晶体管G2的集电极相连,电阻R1与电容C2串联后并联在变压器T的输入端。整流电路1由二极管V1、V2、V3、V4、V5和V6组成,二极管V1、V2和V3的阴极与晶体管G3、G4的集电极相连,其阳极分别与二极管V4、V5和V6的阴极相连,二极管V4、V5和V6的阳极与晶体管G1、G2的发射极相连。测试电路4包括被测电抗器L2及并联在被测电抗器L2两端的电容C3,电容C3的两端与变压器T的输出端相连。
测试原理:被测电抗器的电感L2已知,并匹配一个耐压值较高的已知电容C3与之并联,输入被测电抗器L2电感值L,通过计算对逆变电路2的控制,输出一个特定频率ω的电流,并通过高频变压器T升压,施加在被测电抗器L2两端,使得电感L与电容C发生谐振,此时,电抗器L2两端电压高,电流小,当高频变压器T升压并达到2倍的系统电压时,若电抗器L2没有发生匝间短路的现象,则测试合格,反之,不合格。
以上所述的实施例仅仅是对本发明的优选实施方式进行描述,并非对本发明的范围进行限定,在不脱离本发明设计精神的前提下,本领域普通技术人员对本发明的技术方案作出的各种变形和改进,均应落入本发明权利要求书确定的保护范围内。

Claims (4)

1.一种用于电抗器匝间绝缘测试装置,其特征在于:包括三相调压器、整流电路、逆变电路、RLC滤波电路、高频变压器T和测试电路,所述逆变电路包括绝缘栅极型晶体管G1、G2、G3、G4和电容C1,所述晶体管G1和晶体管G2的发射极相连,晶体管G1、G2集电极分别与晶体管G3、G4的发射极相连,所述晶体管G3、G4的集电极以及晶体管G1、G2的发射极分别与电容C1的两端相连,所述电容C1的两端与整流电路的输出端相连,所述整流电路的输入端与三相调压器的输出端相连,所述晶体管G1的集电极和晶体管G2的集电极经RLC滤波电路与高频变压器T的输入端相连,变压器T的输出端与测试电路的输入端相连。
2.根据权利要求1所述的用于电抗器匝间绝缘测试装置,其特征在于:所述RLC滤波电路由电感L1、电阻R1和电容C2组成,所述电感L1的一端与晶体管G1的集电极相连,其另一端依次经电阻R1和电容C2与晶体管G2的集电极相连,所述电阻R1与电容C2串联后并联在变压器T的输入端。
3.根据权利要求1所述的用于电抗器匝间绝缘测试装置,其特征在于:所述整流电路由二极管V1、V2、V3、V4、V5和V6组成,所述二极管V1、V2和V3的阴极与晶体管G3、G4的集电极相连,其阳极分别与二极管V4、V5和V6的阴极相连,二极管V4、V5和V6的阳极与晶体管G1、G2的发射极相连。
4.根据权利要求1所述的用于电抗器匝间绝缘测试装置,其特征在于:所述测试电路包括被测电抗器L2及并联在被测电抗器L2两端的电容C3,所述电容C3的两端与变压器T的输出端相连。
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CN106208736A (zh) * 2016-08-25 2016-12-07 李建新 一种交流电压自动稳压系统
CN108957292A (zh) * 2018-07-23 2018-12-07 南京南瑞继保电气有限公司 一种通用型功率模块测试电路、系统及测试方法
CN108983047A (zh) * 2018-05-24 2018-12-11 国网江西省电力有限公司电力科学研究院 一种绝缘模拟实验装置
CN109031056A (zh) * 2018-06-06 2018-12-18 国网江西省电力有限公司吉安供电分公司 一种电流互感器二次线圈匝间绝缘测试装置及方法
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CN111157828A (zh) * 2020-02-26 2020-05-15 东莞立德电子有限公司 一种交流电抗器负载测试电路和测试方法
CN117192443A (zh) * 2023-11-03 2023-12-08 常州同惠电子股份有限公司 一种用于匝间测试仪的测试方法及测试系统

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CN109031056A (zh) * 2018-06-06 2018-12-18 国网江西省电力有限公司吉安供电分公司 一种电流互感器二次线圈匝间绝缘测试装置及方法
CN108957292A (zh) * 2018-07-23 2018-12-07 南京南瑞继保电气有限公司 一种通用型功率模块测试电路、系统及测试方法
CN109375077A (zh) * 2018-11-28 2019-02-22 国网河南省电力公司南阳供电公司 一种电气设备绝缘参数速测装置与方法
CN109375077B (zh) * 2018-11-28 2024-04-05 国网河南省电力公司南阳供电公司 一种电气设备绝缘参数速测装置与方法
CN109901037A (zh) * 2019-04-04 2019-06-18 中国科学院电工研究所 基于材料绝缘寿命的高频变压器出厂绝缘试验电压测定方法
CN111157828A (zh) * 2020-02-26 2020-05-15 东莞立德电子有限公司 一种交流电抗器负载测试电路和测试方法
CN111157828B (zh) * 2020-02-26 2022-06-28 东莞立德电子有限公司 一种交流电抗器负载测试电路和测试方法
CN117192443A (zh) * 2023-11-03 2023-12-08 常州同惠电子股份有限公司 一种用于匝间测试仪的测试方法及测试系统
CN117192443B (zh) * 2023-11-03 2024-02-09 常州同惠电子股份有限公司 一种用于匝间测试仪的测试方法及测试系统

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Application publication date: 20160217