CN109494029A - A kind of superconduction GIL insulator electric field homogenization process based on surface graded conductance - Google Patents

A kind of superconduction GIL insulator electric field homogenization process based on surface graded conductance Download PDF

Info

Publication number
CN109494029A
CN109494029A CN201811634824.9A CN201811634824A CN109494029A CN 109494029 A CN109494029 A CN 109494029A CN 201811634824 A CN201811634824 A CN 201811634824A CN 109494029 A CN109494029 A CN 109494029A
Authority
CN
China
Prior art keywords
insulator
electric field
conductance
distribution
superconduction
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.)
Granted
Application number
CN201811634824.9A
Other languages
Chinese (zh)
Other versions
CN109494029B (en
Inventor
杜伯学
冉昭玉
李进
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.)
Tianjin University
Original Assignee
Tianjin University
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 Tianjin University filed Critical Tianjin University
Priority to CN201811634824.9A priority Critical patent/CN109494029B/en
Publication of CN109494029A publication Critical patent/CN109494029A/en
Application granted granted Critical
Publication of CN109494029B publication Critical patent/CN109494029B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/42—Means for obtaining improved distribution of voltage; Protection against arc discharges
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulators (AREA)

Abstract

The present invention discloses a kind of superconduction GIL insulator electric field homogenization process based on surface graded conductance, by regulation rotary table insulator surface layer conductance distribution, to realize electric Field Optimization；The following steps are included: (1) establishes insulator axial coordinates；(2) meet between insulator surface conductivityσ (z) and insulator axial coordinate z: σ (z)=k (z-z0)2+σ0, wherein k is the parameter for needing to optimize in calculating, S/m2；z0It is the coordinate of insulator bottom surface, m；σ0It is the surface conductivity of insulator foot, S/m；(3) k is respectively set to n different values, n >=2；(4) insulator is calculated in the field distribution of DC voltage m kV lower edge axial direction using the AC/DC module in COMSOL Multiphysics software；(5) according to simulation result, in electric field overall distribution uniformity highest, optimized parameter k is chosen, that is, constructs the distribution of surface conductivity Optimal gradient, the effect for being homogenized electric field at this time is best.

Description

A kind of superconduction GIL insulator electric field homogenization process based on surface graded conductance
Technical field
The invention belongs to high-tension apparatus design and its manufacturing fields, and in particular to a kind of superconduction based on surface graded conductance GIL insulator electric field homogenization process.
Background technique
So far, high-temperature superconductor (HTS) technology is attracted wide attention due to its plurality of advantages.Meanwhile gas-insulated Line (GIL) also has made great progress in practical applications, and electrical design can be described as the biography of the superconduction gas-insulated in HTS system Defeated line (S-GIL).According to the present Research and operating experience of traditional GIL, under DC electric field, charge in longtime running often It can be collected at insulator surface, the electric field distortion at three binding site of high-field electrode, gas phase and insulator surface will lead to part and put Electricity or even insulator edge flashing, the great threat safe operation of whole system.Therefore, there is an urgent need to suitably insulate to set It counts to meet the requirement of gaseous refrigerant HTS system.Surface design is carried out to rotary table insulator, makes it have surface layer conductance two dimension Gradient distribution is homogenized whole field distribution, provides new thinking to further increase GIL insulator reliability, for promoting Direct current power system further develops significant.
Rotary table insulator in practical electrical system mostly uses epoxy resin/Al2O3Composite material, the present invention are directed to rotary table Insulator, design realize the distribution of its surface layer electrical conductivity gradients, non-linear increase are presented, from grounding electrode to high-field electrode to be homogenized circle The field distribution of platform insulator.Studies have shown that the epoxy rotary table insulator of gradient distribution rule, field distribution is presented in surface layer conductance Uniformity coefficient will be obviously improved.Therefore, insulating properties of the design surface layer electrical conductivity gradients rotary table insulator for optimization S-GIL insulator Can, improve the entire reliability of transmission system has important theoretical value and directive significance.
Summary of the invention
Purpose of the invention is to overcome the shortcomings in the prior art, provides a kind of superconduction based on surface graded conductance GIL insulator electric field homogenization process.According to gradient design principle, epoxy resin insulator has surface layer conductance non-linear growth Gradient distribution, field distribution are optimized, and the insulation performance and transmission system global reliability of S-GIL insulator are improved.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of superconduction GIL insulator electric field homogenization process based on surface graded conductance, comprising the following steps:
(1) insulator axial coordinates are established；
(2) meet between insulator surface conductivityσ (z) and insulator axial coordinate z: σ (z)=k (z-z0)2+σ0, Middle k is the parameter for needing to optimize in calculating, S/m2；z0It is the coordinate of insulator bottom surface, m；σ0It is the surface electricity of insulator foot Conductance, S/m；
(3) k is respectively set to n different values, n >=2；
(4) insulator is calculated at DC voltage m kV using the AC/DC module in COMSOL Multiphysics software Along axial field distribution；
(5) according to simulation result, in electric field overall distribution uniformity highest, optimized parameter k is chosen, that is, constructs surface The distribution of conductivity Optimal gradient, the effect for being homogenized electric field at this time are best.
Further, rotary table insulator surface layer conductance is gradient distribution, axial from grounding electrode to height along rotary table insulator Non-linear increase is presented in piezoelectricity pole.
Compared with prior art, the beneficial effects brought by the technical solution of the present invention are as follows:
Epoxy resin insulator surface conductivity is distributed by the present invention carries out gradient design, obtains surface layer conductance in non-linear The insulator for increasing distribution, has regulated and controled field distribution, achievees the purpose that promote Insulators Used.Therefore, the present invention is to optimization GIL The performance of insulator and transmission system overall security, reliability have important value and significance in system.
Detailed description of the invention
Fig. 1 is the gradient distribution of epoxy resin rotary table insulator surface conductance non-linear growth.
Fig. 2 is insulator electric field distribution map.
Specific embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.It should be appreciated that described herein Specific embodiment be only used to explain the present invention, be not intended to limit the present invention.
A kind of superconduction GIL insulator electric field homogenization process based on surface graded conductance passes through regulation rotary table insulation sublist Layer conductance distribution, to realize electric Field Optimization；Rotary table insulator surface layer conductance is gradient distribution, axial from grounding electrode along insulator Non-linear increase is presented to high-field electrode, sees Fig. 1.Specific implementation step is as follows:
1. establish insulator axial coordinates, axial coordinate z is from insulator bottom surface to increasing above, -4 ﹤ z ﹤ 0 (cm).
2. meeting between insulator surface conductivityσ (z) and insulator axial coordinate z: σ (z)=k (z-z0)2+σ0, wherein K is the parameter for needing to optimize in calculating, S/m2；z0It is the coordinate of insulator bottom surface, m；σ0It is the surface conductance of insulator foot Rate, S/m.
3. k is respectively set to 8 different values: 0,0.5E-19,1E-19,1.5E-19,2E-19,2.5E-19,3E- 19、3.5E-19S/m2。
4. calculating insulator at DC voltage 150kV using the AC/DC module in COMSOL Multiphysics software Along axial field distribution.
5., in electric field overall distribution uniformity highest, choosing optimized parameter k, i.e. k=1.5E- according to simulation result 19S/m2When, the effect of surface graded conductance homogenizing electric field is best, sees Fig. 2.
The present invention is not limited to embodiments described above.Above the description of specific embodiment is intended to describe and say Bright technical solution of the present invention, the above mentioned embodiment is only schematical, is not restrictive.This is not being departed from In the case of invention objective and scope of the claimed protection, those skilled in the art may be used also under the inspiration of the present invention The specific transformation of many forms is made, within these are all belonged to the scope of protection of the present invention.

Claims (2)

1. a kind of superconduction GIL insulator electric field homogenization process based on surface graded conductance, which is characterized in that including following step It is rapid:
(1) insulator axial coordinates are established；
(2) meet between insulator surface conductivityσ (z) and insulator axial coordinate z: σ (z)=k (z-z0)2+σ0, wherein k be The parameter for needing to optimize in calculating, S/m2；z0It is the coordinate of insulator bottom surface, m；σ0It is the surface conductivity of insulator foot, S/m；
(3) k is respectively set to n different values, n >=2；
(4) insulator is calculated at DC voltage m kV along axis using the AC/DC module in COMSOL Multiphysics software To field distribution；
(5) according to simulation result, in electric field overall distribution uniformity highest, optimized parameter k is chosen, that is, constructs surface conductance The distribution of rate Optimal gradient, the effect for being homogenized electric field at this time are best.
2. a kind of superconduction GIL insulator electric field homogenization process based on surface graded conductance according to claim 1, feature It is, rotary table insulator surface layer conductance is gradient distribution, non-along the axial presentation from grounding electrode to high-field electrode of rotary table insulator It is linearly increasing.
CN201811634824.9A 2018-12-29 2018-12-29 Superconducting GIL insulator electric field homogenization method based on surface gradient conductance Active CN109494029B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811634824.9A CN109494029B (en) 2018-12-29 2018-12-29 Superconducting GIL insulator electric field homogenization method based on surface gradient conductance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811634824.9A CN109494029B (en) 2018-12-29 2018-12-29 Superconducting GIL insulator electric field homogenization method based on surface gradient conductance

Publications (2)

Publication Number Publication Date
CN109494029A true CN109494029A (en) 2019-03-19
CN109494029B CN109494029B (en) 2020-04-28

Family

ID=65713304

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811634824.9A Active CN109494029B (en) 2018-12-29 2018-12-29 Superconducting GIL insulator electric field homogenization method based on surface gradient conductance

Country Status (1)

Country Link
CN (1) CN109494029B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111460642A (en) * 2020-03-25 2020-07-28 天津大学 High-voltage GI L gas-solid interface electric field distribution optimization method
CN113470907A (en) * 2021-06-23 2021-10-01 西安交通大学 Method for inhibiting partial discharge at flange of GIS/GIL supporting insulator

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11126526A (en) * 1997-10-23 1999-05-11 Toshiba Corp Gas bushing
CN105137298A (en) * 2015-08-25 2015-12-09 国家电网公司 Transmission line suspension insulator string external insulation state assessment method
CN105243239A (en) * 2015-11-10 2016-01-13 南通河海大学海洋与近海工程研究院 Method for composite insulator electric field optimization of power transmission line
WO2017035533A1 (en) * 2015-08-27 2017-03-02 Massachusetts Institute Of Technology Guided-wave photodetector apparatus employing mid-bandgap states of semiconductor materials, and fabrication methods for same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11126526A (en) * 1997-10-23 1999-05-11 Toshiba Corp Gas bushing
CN105137298A (en) * 2015-08-25 2015-12-09 国家电网公司 Transmission line suspension insulator string external insulation state assessment method
WO2017035533A1 (en) * 2015-08-27 2017-03-02 Massachusetts Institute Of Technology Guided-wave photodetector apparatus employing mid-bandgap states of semiconductor materials, and fabrication methods for same
CN105243239A (en) * 2015-11-10 2016-01-13 南通河海大学海洋与近海工程研究院 Method for composite insulator electric field optimization of power transmission line

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
贾志杰等: "500 kV直流GIL支撑绝缘子的电场优化", 《高压电器》 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111460642A (en) * 2020-03-25 2020-07-28 天津大学 High-voltage GI L gas-solid interface electric field distribution optimization method
CN113470907A (en) * 2021-06-23 2021-10-01 西安交通大学 Method for inhibiting partial discharge at flange of GIS/GIL supporting insulator
CN113470907B (en) * 2021-06-23 2022-07-12 西安交通大学 Method for inhibiting partial discharge at flange of GIS/GIL supporting insulator

Also Published As

Publication number Publication date
CN109494029B (en) 2020-04-28

Similar Documents

Publication Publication Date Title
CN109494029A (en) A kind of superconduction GIL insulator electric field homogenization process based on surface graded conductance
Zhang et al. Numerical analysis of electric-field distribution around composite insulator and head of transmission tower
Ran et al. Electric field regulation of insulator interface by FGM with conductivity for superconducting-GIL
Yang et al. Transient electric field computation for composite cross-arm in 750 kV AC transmission line under lightning impulse voltage
Li et al. Improving the electric field distribution in stress cone of HTS DC cable terminals by nonlinear conductive epoxy/ZnO composites
CN204167019U (en) A kind of composite high-voltage bushing
Gao et al. Breakdown characteristics of a long air gap containing a floating conductor under positive switching impulse
Zhou et al. Measurement and modeling of low-frequency current from hybrid AC/DC corona
Sima et al. Secondary arc current of ultra‐high voltage transmission line with a mixed voltage of 1000/500 kV on a single tower
Wang et al. The electric energy loss in overhead ground wires of 110kV six-circuit transmission line on the same tower
CN108875225A (en) Regulation method for insulator and its surface field in GIS/GIL
Cheon et al. Insulation design of 60 kV class bushing at the cryogenic temperature
Huang et al. Characteristics of the flexible graphite grounding material and its engineering application
Na et al. Experimental study on the electrical breakdown characteristics of sub-cooled liquid nitrogen for designing a high voltage superconducting machine
CN206921739U (en) A kind of high-voltage isolating switch device
Vu-Cong et al. Electric field computation for HVDC GIS/GIL spacer under superimposed impulse conditions
Li et al. Design and optimization of 1000 kV DC GIL post spacer with surface conductivity gradient for ITER neutral beam injector
Yang et al. Dielectric strength of laminated paper and polymer materials under aging and tensile stress at 77 K
Koo et al. Insulation design of cryogenic bushing for superconducting electric power applications
CN203422999U (en) Circular shielding insulating bus
CN104319034A (en) Simple composite high-voltage bushing
Li et al. Simplified Design of Preset Stress Cone for HTS DC Energy Pipeline
Wang et al. Electrostatic simulation and analysis of transmission line corner section for the CRAFT NNBI test platform
Zhu et al. Optimization of Electric Field Distribution for Tri-Phase Tri-Post Insulator in 220kV GIL
CN204167834U (en) A kind of outdoor part of high-voltage wall bushing

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