CN113408086B - 空心电抗器自感值的解析计算方法 - Google Patents

空心电抗器自感值的解析计算方法 Download PDF

Info

Publication number
CN113408086B
CN113408086B CN202110567019.4A CN202110567019A CN113408086B CN 113408086 B CN113408086 B CN 113408086B CN 202110567019 A CN202110567019 A CN 202110567019A CN 113408086 B CN113408086 B CN 113408086B
Authority
CN
China
Prior art keywords
air
self
core reactor
inductance value
formula
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202110567019.4A
Other languages
English (en)
Other versions
CN113408086A (zh
Inventor
肖旭亮
吕建国
杨国红
王洪峰
朱晓东
许湧平
李聪
丁田力
史良
田楠楠
王海燕
李向伟
刘汝琛
张茜茹
漆敏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Energy Engineering Group Shanxi Electric Power Engineering Co Ltd
Original Assignee
China Energy Engineering Group Shanxi Electric Power Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Energy Engineering Group Shanxi Electric Power Engineering Co Ltd filed Critical China Energy Engineering Group Shanxi Electric Power Engineering Co Ltd
Priority to CN202110567019.4A priority Critical patent/CN113408086B/zh
Publication of CN113408086A publication Critical patent/CN113408086A/zh
Application granted granted Critical
Publication of CN113408086B publication Critical patent/CN113408086B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00Computer-aided design [CAD]
    • G06F30/10Geometric CAD
    • G06F30/18Network design, e.g. design based on topological or interconnect aspects of utility systems, piping, heating ventilation air conditioning [HVAC] or cabling
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00Computer-aided design [CAD]
    • G06F30/20Design optimisation, verification or simulation
    • G06F30/23Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2113/00Details relating to the application field
    • G06F2113/14Pipes
    • 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
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Evolutionary Computation (AREA)
  • Computational Mathematics (AREA)
  • Pure & Applied Mathematics (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Analysis (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Housings And Mounting Of Transformers (AREA)

Abstract

本发明公开了一种空心电抗器自感值的解析计算方法,如何开发一种空心螺线管的初等函数表示公式,解决变电站相应磁场的计算问题;本专利另辟蹊径,通过巧妙的积分变换,绕开直接的磁密分析,获得矢量磁位的解析式,进而获得矢量空心电抗器自感值的解析计算方法,以替代有限元数值解法,本发明提供空心电抗器尺寸参数、绕组参数与电感数值之间的确定方法,从而节省计算时间及计算资源。

Description

空心电抗器自感值的解析计算方法
技术领域
本发明涉及一种空心电抗器,特别涉及一种空心电抗器自感值的解析计算方法。
背景技术
从电气模型上看,空心螺线管可以看成是有限轴长的通电螺线管,通电螺线管的磁场,为中心轴线对称磁场,运用毕奥-萨伐尔定律对其进行解析分析,会获得椭圆积分,但其无法用初等函数表示,故长期以来空心螺线管的磁场分布,以及参数计算无法用初等函数表示,致使空心电抗器的自感计算值只能通过有限元法数值计算实现,存在费时费力的问题,特别是在变电站内电气设计时,如何开发一种空心螺线管的初等函数表示公式,以方便设计人员较快地计算出磁场强度,成为现场需要解决的一个问题。
发明内容
本发明提供了一种空心电抗器自感值的解析计算方法,如何开发一种空心螺线管的初等函数表示公式,解决变电站相应磁场的计算问题。
本发明是通过以下技术方案解决以上技术问题的:
本发明的总体构思是:本专利另辟蹊径,通过巧妙的积分变换,绕开直接的磁密分析,获得矢量磁位的解析式,进而获得矢量空心电抗器自感值的解析计算方法,以替代有限元数值解法,本发明提供空心电抗器尺寸参数、绕组参数与电感数值之间的确定方法,从而节省计算时间及计算资源。
置放在单一介质中的导电物体所生成的矢量磁位可由下式计算式(1):
Figure GDA0004070935820000021
考虑一个放置于空气中半径为r的导电圆桶产生的磁场,简便起见,忽略其径向厚度,则根据上式可得到电流微元产生的矢量磁位微元为计算式(2):
Figure GDA0004070935820000022
容易知其生成的矢量磁位在整个空间中的方向都是与圆环同心的环形切向方向,由于其中心对称性,可知任意一个经过圆环圆心的平面上的磁场分布都是相同的,因此取其中一个平面,在其内建立rz坐标系,该平面内的矢量磁位全为法向方向,考虑导电圆筒的任意一个垂直于中心轴的截面上的任意一电流微元在任意一点P所生成的矢量磁位微元,如图1所示,图中P`点是P点在截面上的投影,易知,整个电流圆周在P点所生成的矢量磁位的径向分量之和为零,故而只考虑切向分量,图1所示的电流微元在P点所生成的矢量磁位微元的切向分量可由以下计算式(3):
Figure GDA0004070935820000023
其中
Figure GDA0004070935820000024
的物理意义如图1所示,由图1及余弦定理可知以下计算式(4):
Figure GDA0004070935820000031
可知矢量磁位的计算式(5)为:
Figure GDA0004070935820000032
该式子同样无法获得解析结果,然而,巧妙地将被积分量
Figure GDA0004070935820000033
换为被积分量θ,可以获得解析结果;由图2可见,在直角三角形EDE'中,有以下计算式(6):
ED|=RsinΔθ(6);
图2将被积分量
Figure GDA0004070935820000034
换为被积分量θ,得到以下计算式(7):
E'D|=|PE'|-|PD|=R+ΔR-RcosΔθ=ΔR+R(1-cosΔθ)(7);
所以得到计算式(8):
Figure GDA0004070935820000035
从而得到计算式(9):
Figure GDA0004070935820000036
当Δθ→0时,由于
Figure GDA0004070935820000037
是Δθ2的高阶无穷小,而
Figure GDA0004070935820000038
是Δθ2的同阶无穷小,因此计算式(9)变为以下计算式(10):
Figure GDA0004070935820000041
将计算式(10)代入计算式(3),同时结合计算式(4),可得计算式(11):
Figure GDA0004070935820000042
对于计算式(11),分别对θ和l进行积分,经过复杂的积分运算,可得计算式(12):
Figure GDA0004070935820000043
式中:
Figure GDA0004070935820000044
Figure GDA0004070935820000045
Figure GDA0004070935820000046
Figure GDA0004070935820000047
Figure GDA0004070935820000048
Figure GDA0004070935820000049
Figure GDA0004070935820000051
Figure GDA0004070935820000052
Figure GDA0004070935820000053
Figure GDA0004070935820000054
Figure GDA0004070935820000055
Figure GDA0004070935820000056
Figure GDA0004070935820000057
Figure GDA0004070935820000058
Figure GDA0004070935820000059
Figure GDA00040709358200000510
Figure GDA00040709358200000511
Figure GDA00040709358200000512
Figure GDA00040709358200000513
c0i=εr2
c1i=4r2
Figure GDA00040709358200000514
Figure GDA0004070935820000061
Figure GDA0004070935820000062
Figure GDA0004070935820000063
由于矢量磁位为切向方向,且任意同心环上各点的矢量磁位模值相等,运用斯托克斯定理可将磁通的双重积分计算转化为简单的乘积计算,大幅简化了计算难度。根据式(12),运用斯托克斯定律,电抗器中某一匝线圈所交链的磁通为计算式(13):
Figure GDA0004070935820000064
其中li为该匝线圈所在位置的纵坐标,则可以计算电抗器的电感值为计算式(14):
Figure GDA0004070935820000065
上述为本发明的原理。本发明所提供的具体技术方案如下:
采用如下计步骤计算空心电抗器的自感参数:
l为空心电抗器的轴向长度,r是空心电抗器线圈中心线的半径,如图1所示。由下述公式计算Ai
Figure GDA0004070935820000066
式中:
Figure GDA0004070935820000071
Figure GDA0004070935820000072
Figure GDA0004070935820000073
Figure GDA0004070935820000074
Figure GDA0004070935820000075
Figure GDA0004070935820000076
Figure GDA0004070935820000077
Figure GDA0004070935820000078
Figure GDA0004070935820000079
Figure GDA00040709358200000710
Figure GDA00040709358200000711
Figure GDA00040709358200000712
Figure GDA00040709358200000713
Figure GDA0004070935820000081
Figure GDA0004070935820000082
Figure GDA0004070935820000083
Figure GDA0004070935820000084
Figure GDA0004070935820000085
c0i=εr2
c1i=4r2
Figure GDA0004070935820000086
Figure GDA0004070935820000087
Figure GDA0004070935820000088
Figure GDA0004070935820000089
ε取0.005~0.01;sinh是双曲正弦函数,arsinh是反双曲正弦函数;分别取i=1、2、3、4.......N-1、N,然后按照步骤(1)中的公式,分别计算A1、A2、A3、A4....AN-1、AN,其中N是空心电抗器的匝数;按照下列公式计算空心电抗器的自感L:
Figure GDA00040709358200000810
上述公式均采用国际单位制。
根据空心螺线管的尺寸参数、绕组参数,通过解析表达式确定空心螺线管电感参数。本发明具有节省计算时间及计算资源的优点。
附图说明
图1是电圆筒的任意一个垂直于中心轴的截面上的任意一电流微元在任意一点P所生成的矢量磁位微元;
图2是本发明的整个电流圆周在P点所生成的矢量磁位图;
图3是本发明的空心电抗器的截面图。
具体实施方式
下面结合附图对本发明进行详细说明:
对于半径为1.108m、轴向长度为2.47m、匝数为560的一个空心电抗器,采用本发明所述的计算方法计算其自感,则r=1.108,l=2.47,N=560,代入本发明所述的计算步骤,计算得到自感L=0.436H。

Claims (1)

1.一种空心电抗器自感值的解析计算方法:其特征在于:采用如下计步骤计算空心电抗器的自感参数:
(1)l为空心电抗器的轴向长度,r是空心电抗器半径,
由下述公式计算矢量磁位Ai
Figure FDA0004070935790000011
式中:
Figure FDA0004070935790000012
Figure FDA0004070935790000013
Figure FDA0004070935790000014
Figure FDA0004070935790000015
Figure FDA0004070935790000016
Figure FDA0004070935790000017
Figure FDA0004070935790000018
Figure FDA0004070935790000021
Figure FDA0004070935790000022
Figure FDA0004070935790000023
Figure FDA0004070935790000024
Figure FDA0004070935790000025
Figure FDA0004070935790000026
Figure FDA0004070935790000027
Figure FDA0004070935790000028
Figure FDA0004070935790000029
Figure FDA00040709357900000210
Figure FDA00040709357900000211
c0i=εr2
c1i=4r2
Figure FDA00040709357900000212
Figure FDA00040709357900000213
Figure FDA00040709357900000214
Figure FDA00040709357900000215
ε取0.005~0.01;sinh是双曲正弦函数,arsinh是反双曲正弦函数;
(2)分别取i=1、2、3、4……N-1、N,然后按照步骤(1)中的公式,分别计算A1、A2、A3、A4…AN-1、AN,其中N是空心电抗器的匝数;
(3)按照下列公式计算空心电抗器的自感L:
Figure FDA0004070935790000031
CN202110567019.4A 2021-05-24 2021-05-24 空心电抗器自感值的解析计算方法 Active CN113408086B (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110567019.4A CN113408086B (zh) 2021-05-24 2021-05-24 空心电抗器自感值的解析计算方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110567019.4A CN113408086B (zh) 2021-05-24 2021-05-24 空心电抗器自感值的解析计算方法

Publications (2)

Publication Number Publication Date
CN113408086A CN113408086A (zh) 2021-09-17
CN113408086B true CN113408086B (zh) 2023-04-07

Family

ID=77674654

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110567019.4A Active CN113408086B (zh) 2021-05-24 2021-05-24 空心电抗器自感值的解析计算方法

Country Status (1)

Country Link
CN (1) CN113408086B (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114886404B (zh) * 2022-07-13 2022-10-28 西南民族大学 一种电子设备、装置及存储介质

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102360734A (zh) * 2011-09-19 2012-02-22 李景禄 智能型楔入式平滑可调电抗器
CN102832900A (zh) * 2012-09-11 2012-12-19 武汉大学 一种lc耦合螺线管滤波器及其设计方法
CN105702436A (zh) * 2016-04-19 2016-06-22 铁道第三勘察设计院集团有限公司 一种应用于高铁接触网的交流融冰电抗器及其设计方法
CN106649935A (zh) * 2016-09-27 2017-05-10 华北电力大学 一种特高压变压器空载直流偏磁励磁电流实时计算方法
CN109239544A (zh) * 2018-08-22 2019-01-18 珠海华网科技有限责任公司 一种振荡波系统用空心电抗器设计方法
CN109473949A (zh) * 2018-10-22 2019-03-15 国网吉林省电力有限公司电力科学研究院 干式空心并联电抗器组匝间短路故障继电保护方法及装置
CN111193462A (zh) * 2020-02-20 2020-05-22 福州大学 一种六相单绕组无轴承磁通切换电机转子悬浮旋转直接控制方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4432953B2 (ja) * 2006-09-27 2010-03-17 株式会社日立製作所 半導体電力変換装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102360734A (zh) * 2011-09-19 2012-02-22 李景禄 智能型楔入式平滑可调电抗器
CN102832900A (zh) * 2012-09-11 2012-12-19 武汉大学 一种lc耦合螺线管滤波器及其设计方法
CN105702436A (zh) * 2016-04-19 2016-06-22 铁道第三勘察设计院集团有限公司 一种应用于高铁接触网的交流融冰电抗器及其设计方法
CN106649935A (zh) * 2016-09-27 2017-05-10 华北电力大学 一种特高压变压器空载直流偏磁励磁电流实时计算方法
CN109239544A (zh) * 2018-08-22 2019-01-18 珠海华网科技有限责任公司 一种振荡波系统用空心电抗器设计方法
CN109473949A (zh) * 2018-10-22 2019-03-15 国网吉林省电力有限公司电力科学研究院 干式空心并联电抗器组匝间短路故障继电保护方法及装置
CN111193462A (zh) * 2020-02-20 2020-05-22 福州大学 一种六相单绕组无轴承磁通切换电机转子悬浮旋转直接控制方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"空心电抗器电感的解析计算";郑莉平 等;《电子器件》;20110831;第34卷(第4期);第391-394页 *

Also Published As

Publication number Publication date
CN113408086A (zh) 2021-09-17

Similar Documents

Publication Publication Date Title
CN102087903B (zh) 双面对称布线pcb型罗氏线圈
CN113408086B (zh) 空心电抗器自感值的解析计算方法
CN110369246B (zh) 基于Halbach永磁阵列的惯性激振器及其设计方法
CN103808794A (zh) 基于acfm的外穿式管柱缺陷快速检测阵列探头
CN104183355B (zh) 超导磁体系统以及屏蔽线圈组件
CN117669455B (zh) 一种无人地面车辆高适应性耦合线圈及其优化方法
Luo Field and inductance calculations for coaxial circular coils with magnetic cores of finite length and constant permeability
Dawood et al. Optimization and analysis of leakage reactance for a converter transformer of the electric transport system
CN105510673A (zh) 一种直流电流测量装置
US4725803A (en) Gradient coil for nuclear magnetic resonance image forming apparatus
CN111060858B (zh) 一种磁屏蔽桶内高均匀磁场与梯度复合磁场产生方法
CN109239544B (zh) 一种振荡波系统用空心电抗器设计方法
CN206498300U (zh) 一种永磁转轴加工的精确定位装置
US2971145A (en) Uni-directional high voltage generator
CN114512313A (zh) 一种额定二次电流低于1a的电流互感器
CN106549539B (zh) 一种永磁转轴机械加工的磁场屏蔽装置
CN109557486B (zh) 基于缩比准则的多包封干式空心电抗器的磁场分析方法
CN109782043B (zh) 外卡型电流传感器及其制作方法、辅助制作工装
Meng et al. Research on distribution of winding leakage magnetic field of three-phase dry type transformer under short-circuit condition
CN104269261A (zh) 一种电流互感器
CN112447385B (zh) 一种大功率铜排测量用漏电互感器
CN111123179B (zh) 一种最后闭合磁面半径与径向角度关系的计算方法
Zhang et al. An Improved Calculation Method for Magnetic Flux Leakage of Dry-Type Transformer
CN201918252U (zh) 一种用于产生高电压的微型电流互感器
CN117012529A (zh) 一种中高压电流标准互感器

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant