Iet Science Measurement & Technology最新文献_第10页

Interface quasi-distributed fibre Bragg grating positioning detection of glaze icing load on composite insulators 复合绝缘子上釉覆冰载荷的界面准分布式光纤光栅定位检测

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2022-05-13 DOI: 10.1049/smt2.12106

Yanpeng Hao, Lei Huang, Jie Wei, Ruijian Pan, Weixun Zhang, Lin Yang

{"title":"Interface quasi-distributed fibre Bragg grating positioning detection of glaze icing load on composite insulators","authors":"Yanpeng Hao, Lei Huang, Jie Wei, Ruijian Pan, Weixun Zhang, Lin Yang","doi":"10.1049/smt2.12106","DOIUrl":"10.1049/smt2.12106","url":null,"abstract":"The electrical performance of transmission line insulators will decrease dramatically under ice-covered conditions, and ice flashover may occur under operating voltage. There is no direct and effective monitoring method for ice cover on insulators of transmission lines. In this paper, the interface quasi-distributed fibre Bragg grating (FBG) is used to study the positioning detection of glaze icing loads on composite insulators, and a mechanical lever model of single glaze icing load on single umbrella detection with three FBGs is established. Based on this model, a multi-glaze location detection method on multiple umbrella skirts is proposed. Six optical fibres with 13 quasi-distributed FBGs each are implanted into the interface of a 110 kV composite insulator. The minimum load test of FBG for detecting glaze icing load, the FBG axial/circumferential sensing rule test for the glaze, and the weight simulation test and laboratory icing verification test for multi-glazes on multi-umbrellas location detection method are carried out. The results show that the positioning of glaze simulated by weights is accurate, and the positioning of icing in the laboratory is basically correct.","PeriodicalId":54999,"journal":{"name":"Iet Science Measurement & Technology","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/smt2.12106","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131514950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Influence of surface discharge on the deterioration characteristics of ethylene-propylene rubber cable insulation under alternating current high voltage 交流高压下表面放电对乙丙橡胶电缆绝缘劣化特性的影响

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2022-04-28 DOI: 10.1049/smt2.12104

Longlei Bai, Daoping Fan, Tianhe Li, Bing Li, Mingwei Su, Shaogui Fan, Liuzhong Zhang

{"title":"Influence of surface discharge on the deterioration characteristics of ethylene-propylene rubber cable insulation under alternating current high voltage","authors":"Longlei Bai, Daoping Fan, Tianhe Li, Bing Li, Mingwei Su, Shaogui Fan, Liuzhong Zhang","doi":"10.1049/smt2.12104","DOIUrl":"10.1049/smt2.12104","url":null,"abstract":"To investigate partial discharge-induced deterioration characteristics of ethylene-propylene rubber (EPR) cable insulation under repeated alternating current (AC) voltage on high-speed trains, an experimental platform with a column-plate EPR insulation model is established. The surface condition and breakdown voltage of insulation samples after discharge treatment are observed and measured. In addition, a fitting formula to evaluate the deterioration extent of EPR samples is proposed. The results show that under repeated discharge pretreatments, the volume resistivity increases first and decreases afterwards when discharge magnitude is low. When partial discharge (PD) intensity increases to 100 pC, the volume and surface resistivity decrease monotonously, and the decreasing rate is positively correlated with PD intensity. During PD pre-treatment, a white circle appears near the electrode and turns to pale yellow with PD intensity. For PD pretreatments of 50 and 100 pC, withstand voltage of EPR insulation increase first and decrease afterwards, and the downward trend is slow. For PD pre-treatments of 200 and 400 pC, the withstand voltage decreases significantly with the degradation time. The fitting formula model shows that under the action of a strong electric field, the relationship between the reliability of EPR insulation samples, the probability and rate of molecular chain breakage, and the intensity of discharge activity is not linear.","PeriodicalId":54999,"journal":{"name":"Iet Science Measurement & Technology","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/smt2.12104","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121761636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Parameters design of voltage sharing components for the series multi-break mechanical switch 系列多断机械开关电压分担元件参数设计

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2022-04-26 DOI: 10.1049/smt2.12105

Daochun Huang, Huaqing Wang, Wanlin Quan, Xin Chen, Mingjing Shuang, Huipeng Li

{"title":"Parameters design of voltage sharing components for the series multi-break mechanical switch","authors":"Daochun Huang, Huaqing Wang, Wanlin Quan, Xin Chen, Mingjing Shuang, Huipeng Li","doi":"10.1049/smt2.12105","DOIUrl":"https://doi.org/10.1049/smt2.12105","url":null,"abstract":"Series multi-break mechanical switch is one of the critical components of high-voltage hybrid DC circuit breakers. However, due to the existence of distributed capacitance, the voltage distribution between the breaks is not balanced. This paper proposed a voltage sharing configuration method of the mechanical switch of hybrid DC circuit breaker, and carried out the static DC voltage and the transient voltage distribution characteristics tests to verify its effectiveness. Considering the influence of whole structure of the circuit breaker, this paper established the electrostatic field model and circuit simulation model of a typical ±535-kV hybrid DC circuit breaker. And it analyzed the influence of single break's opening fault, breaking open distance, and the shielding fitting on the voltage distribution characteristics of series six break mechanical switch. According to the simulation results based on the Zhangbei voltage source converter-based high-voltage direct current project type test parameters, the parameters design of the voltage sharing components of the mechanical switch are obtained, which can meet the voltage sharing coefficient requirement of 95%.","PeriodicalId":54999,"journal":{"name":"Iet Science Measurement & Technology","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/smt2.12105","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137548615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characteristics of electrical tree morphological in glass fibre reinforced epoxy resin under power frequency voltage 工频电压下玻璃纤维增强环氧树脂的电树形态特征

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2022-03-23 DOI: 10.1049/smt2.12102

Yongqiang Wang, Ziye Huang, Xiaolei Zhang, Jing Shang

{"title":"Characteristics of electrical tree morphological in glass fibre reinforced epoxy resin under power frequency voltage","authors":"Yongqiang Wang, Ziye Huang, Xiaolei Zhang, Jing Shang","doi":"10.1049/smt2.12102","DOIUrl":"https://doi.org/10.1049/smt2.12102","url":null,"abstract":"To study the influence of the arrangement of glass fibres on the growth morphology of electric dendrites, this paper conducted experiments on the initiation and cultivation of electric dendrites on insulation specimens with different glass fibre arrangements. The experimental results show that when the electric field is parallel to the glass fibres, the electric dendrites show linear growth with multiple branches; when the electric field is perpendicular to the glass fibres, the electric dendrites show aggregated growth. The analysis suggests that when the applied electric field is parallel to the glass fibre, to release the discharge energy in the main channel of the dendrite, the discharge in the track of the electric dendrite will drive the electric dendrite to grow along the interface area between the glass fibre and the epoxy resin. When the externally applied electric field is perpendicular to the glass fibre, the discharge within the electric dendrite discharge channel is high. To release the energy in the electrical tree channel, the blast in the electrical tree track induces the electrical tree branch to grow along the interface area and forward.","PeriodicalId":54999,"journal":{"name":"Iet Science Measurement & Technology","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/smt2.12102","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137977859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Soil impulse ionisation model based on dynamic changes of electric field 基于电场动态变化的土壤脉冲电离模型

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2022-03-13 DOI: 10.1049/smt2.12103

Xishan Wen, Chun Li, Jiahao Chen, Xuefang Tong, Hao Mei, Guangyuan Zhou, Bichuan Xu, Hailiang Lu

引用次数: 2

A consistency method of discharge detection results at solar-blind ultraviolet based on a radiation transmission model 基于辐射传输模型的日盲紫外线放电检测结果一致性方法

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2022-03-01 DOI: 10.1049/smt2.12100

Yunpeng Liu, Yonglin Li, Jianghai Geng, Muhan Cui, Shilong Huang

{"title":"A consistency method of discharge detection results at solar-blind ultraviolet based on a radiation transmission model","authors":"Yunpeng Liu, Yonglin Li, Jianghai Geng, Muhan Cui, Shilong Huang","doi":"10.1049/smt2.12100","DOIUrl":"10.1049/smt2.12100","url":null,"abstract":"Solar-blind ultraviolet (UV) discharge detection based on UV signals in the solar-blind band from 240 to 280 nm is an effective non-contact discharge detection method for electrical equipment, but there is still a problem that the detection results of different types of UV imagers are not comparable. To this end, by using standard light source and MODTRAN model, the relationship between the facular area and the radiant flux received by UV imagers was investigated by establishing a radiation transmission model for UV detection under different environmental conditions. Through analysis, it was found that the influence of humidity on the transmittance of the solar-blind band in atmosphere can be neglected, and the transmittance is slightly affected by atmospheric pressure, temperature, and detection distance under conditions suitable for UV detection. Moreover, a consistency formula for UV detection results was proposed, thus forming a consistency method for detection results suitable for various types of UV imager. Finally, the feasibility of the consistency method was verified by UV discharge detection tests with a rod-plate model and the absolute irradiance at discharge points of the rod-plate model measured by a grating spectrometer. The consistency method is conducive to the promotion of UV discharge detection technology.","PeriodicalId":54999,"journal":{"name":"Iet Science Measurement & Technology","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/smt2.12100","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124683504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Circuit modelling of aged-polluted polymer insulators based on measured leakage current characteristics 基于实测泄漏电流特性的老化污染聚合物绝缘子电路建模

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2022-02-19 DOI: 10.1049/smt2.12101

Mohammad Goudarzi, Seyed Mohammad Shahrtash, Ahmad Gholami

{"title":"Circuit modelling of aged-polluted polymer insulators based on measured leakage current characteristics","authors":"Mohammad Goudarzi, Seyed Mohammad Shahrtash, Ahmad Gholami","doi":"10.1049/smt2.12101","DOIUrl":"10.1049/smt2.12101","url":null,"abstract":"A new equivalent circuit model for aged-polluted polymer outdoor insulators is proposed here. The structure of the model is constructed as such that it can be applied in investigating the effect of insulator aging and dry band discharge intensity on leakage current (LC) characteristics. To implement the capability of modelling aged insulators, the measured leakage currents from laboratory tests on field aged MV insulators with different level of aging and hydrophobicity were examined. Furthermore, the samples were artificially polluted and the corresponding measured leakage currents from laboratory tests were employed as references. The proposed circuit model can consider the effect of pollution by its topology and represents the aging phenomenon of insulator by the changes in the values of its elements. High similarity between test results and model outputs has confirmed model ability to represent aging effect on LC characteristics. Finally, mathematical equations for model parameters in terms of aging level are extracted using curve fitting, in order to predict the age and life-time of polymer insulator.","PeriodicalId":54999,"journal":{"name":"Iet Science Measurement & Technology","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/smt2.12101","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44171980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

An overview of thermal modelling techniques for permanent magnet machines 永磁电机热建模技术综述

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2022-02-10 DOI: 10.1049/smt2.12099

Sina Khalesidoost, Jawad Faiz, Ehsan Mazaheri-Tehrani

{"title":"An overview of thermal modelling techniques for permanent magnet machines","authors":"Sina Khalesidoost, Jawad Faiz, Ehsan Mazaheri-Tehrani","doi":"10.1049/smt2.12099","DOIUrl":"10.1049/smt2.12099","url":null,"abstract":"Permanent magnet (PM) machines have gained increasing attention from the industry because of their potential merits over conventional electrical machines. High-temperature level in electrical machines is a major factor that can adversely impact the performance and health conditions of these machines. These effects need to be minimized to make them competitive with currently operational machines in the industry. It can be done by performing a thorough thermal analysis of the prototype during the design process and proper online thermal monitoring of the machine during the operation stage. Thermal modelling is a powerful tool for achieving such goals in both cases. This paper aims to review the state-of-the-art of thermal modelling techniques and provide a detailed comparison of them in PM machines. The fundamental concepts of heat transfer and sources of heat in PM machines are first discussed. Then, different thermal modelling techniques, including thermal subdomain models (TSMs), lumped parameter thermal networks (LPTNs), finite element models (FEMs), computational fluid dynamics (CFD), reduced order models (ROMs), and hybrid thermal models (HTMs) are introduced and compared. Finally, the utilization of these models in the thermal design, control, and monitoring of PM machines is studied.","PeriodicalId":54999,"journal":{"name":"Iet Science Measurement & Technology","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/smt2.12099","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45585454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

A strip-based total dissolved solids sensor for water quality analysis 一种用于水质分析的条带式总溶解固体传感器

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2022-01-31 DOI: 10.1049/smt2.12098

Mohammad Makhdoumi Akram, Mohammad Ramezannezhad, Alireza Nikfarjam, Shima Kabiri, Sana Ehyaei

{"title":"A strip-based total dissolved solids sensor for water quality analysis","authors":"Mohammad Makhdoumi Akram, Mohammad Ramezannezhad, Alireza Nikfarjam, Shima Kabiri, Sana Ehyaei","doi":"10.1049/smt2.12098","DOIUrl":"10.1049/smt2.12098","url":null,"abstract":"In this study, a portable Total Dissolved Solids (TDS) and Electrical Conductivity (EC) of water sensor using a disposable polymer strip and the readout circuit segments is presented. The strip consists of gold electrodes and a vent hole for water flow injection inside the measurement chamber. This strip reduces the cost of the measurement, decreases the measurement duration, and increases the repeatability of the system. Besides, there is no demand for electrodes cleaning and recalibration of the system. According to the electrical model of strip electrodes and their frequency responses, the EC value is in the range of 78.1–1230.8 (µs)/cm. The experimental tests are carried out based on the frequency method in the concentration range within 50–800 ppm. The results confirm the linear relation of TDS concentration on the EC voltage value which is 1.9 mV for 1 ppm resolution. Also, the effect of temperature variations on the EC value is investigated. Furthermore, the average amount of error for EC measurement exhibits an acceptable amount in comparison with other studies. Moreover, studying the drift variations for 20 days reveals the maximum drift of 1.6%. Finally, according to the present study, the sensor is a suitable candidate for practical applications.","PeriodicalId":54999,"journal":{"name":"Iet Science Measurement & Technology","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/smt2.12098","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48498985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Full-time domain deformation characteristics of water drop on sheds edge causing insulation failure of large-diameter composite post insulators under heavy rainfall 暴雨作用下棚边水滴导致大直径复合柱式绝缘子绝缘破坏的全时域变形特征

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2021-12-25 DOI: 10.1049/smt2.12096

Lin Yang, Gaofeng Shang, Yifan Liao, Yijie Sun, Yanpeng Hao, Licheng Li

{"title":"Full-time domain deformation characteristics of water drop on sheds edge causing insulation failure of large-diameter composite post insulators under heavy rainfall","authors":"Lin Yang, Gaofeng Shang, Yifan Liao, Yijie Sun, Yanpeng Hao, Licheng Li","doi":"10.1049/smt2.12096","DOIUrl":"10.1049/smt2.12096","url":null,"abstract":"Insulation failures caused by water drops deformation on insulator sheds edge greatly threaten the stable operation of power grid. However, only few studies have focused on water drops deformation characteristics on insulator sheds edge. In this paper, full-time domain deformation of water drop was defined. The rain tests were performed to study the deformation of water drops and obtain water drops parameters under DC voltage. The water drops deformation parameter was selected according to the state of water drops when arc is generated. A fluid-electric field coupling method is employed to establish simulation model to study the influence of water drops initial diameter, initial mass flow rate, DC voltage, and conductivity on water drops deformation. It is indicated that water drops maximum deformation length before first break in simulation is in good consistency with that obtained from rain tests. The water drops initial diameter, initial mass flow rate, and DC voltage significantly influence the deformation of water drops on sheds edge. Moreover, the water drops may even bridge adjacent sheds in some cases. In contrast, the effect of water drops conductivity on the water drops deformation is not apparent.","PeriodicalId":54999,"journal":{"name":"Iet Science Measurement & Technology","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/smt2.12096","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42314151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0