2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)最新文献

{"title":"Evaluation and analysis of activation energy and aging life of polypropylene insulation material by TGA method","authors":"Kaiwen Huang, B. Ouyang, Peng Zhao, Ge Wang, Yao Feng, Songhua Liu, Zhenghong Jing","doi":"10.1109/ICHVE53725.2022.9961369","DOIUrl":"https://doi.org/10.1109/ICHVE53725.2022.9961369","url":null,"abstract":"Thermoplastic polypropylene(PP) has excellent electrical and thermal properties. It does not require cross-linking and degassing in the production process of power cable insulation, meanwhile, the energy consumption of the production process is low. The material is recyclable and can be used as cable insulation material. In this paper, the medium voltage polypropylene cable insulation material was studied with thermogravimetric analysis (TGA). A proper number of polypropylene insulation materials were kept at $280^{circ}mathrm{C}, 290^{circ}mathrm{C}, 300^{circ}mathrm{C}, 310^{circ}mathrm{C}$ for a certain time, and we got the thermogravimetric curve of polypropylene. We calculated the time when the thermostatic weight loss is 5%, 10% and 15%. By linear fitting with Arrhenius equation, activation energy and life equations of polypropylene with 5%, 10% and 15% weight loss were obtained. Therefore, it is inferred that the thermal aging service life of polypropylene insulation cables at the highest operating temperature is 30 years, which can meet the requirements of power cable. The activation energy of polypropylene insulation material was verified by owaza and kissinger method. The research in this paper will provide certain technical support for the aging life for long-term operation of polypropylene insulation materials.","PeriodicalId":125983,"journal":{"name":"2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)","volume":"2005 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131383491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impedance Frequency Characteristics of Ions Electromigration in Soil Macropores","authors":"Yaozheng Ji, Zude Lu, Tao Li, Minghua Jian, Xiaobin Cao, Ruifang Li","doi":"10.1109/ICHVE53725.2022.9961677","DOIUrl":"https://doi.org/10.1109/ICHVE53725.2022.9961677","url":null,"abstract":"Grounding is the key to power system operation, lightning protection and personnel safety, and soil impedance characteristics are the decisive factors for its performance. The electromigration of ions in soil pore water is a key element of its impedance characteristics, and macropores are the main channels to control the movement of water, characteristic ions and air in the soil. As the current passing through the grounding grid and the frequency components of the current show a diversified trend, it is necessary to study the migration of characteristic ions in the soil at multiple frequencies. Since chloride ion, calcium ion and magnesium ion are the main ions in soil pore water, this paper takes these three ions as the object, and prepares CaCl2 and MgCl2solutions with the same concentration to replace soil pore water; then insulating materials are used to build capillary models instead of soil pores. Different solutions are tested for frequency impedance characteristics under the same experimental conditions, and a control group experiment is performed to eliminate the influence of the experimental equipment. Because most of the soil electrical conductivity is now measured by soil resistivity, the data is processed to obtain the resistance frequency characteristic curves of the two solutions in the 0.4(mm) and 0.7(mm) pore models respectively. Combining the obtained experimental data with theoretical analysis, the following conclusions are summarized: Firstly, the ions make a cyclical reciprocating movement under an AC electric field, and its frequency is the same as the frequency of the external power supply. Secondly, the lighter ions have a longer movement distance in one cycle at low frequencies,, and the movements of the ions are close to in-situ vibration at high frequencies. This study revealed the frequency characteristics of the electromigration of ions in the pores of the soil, and explained the influence of the nature of some ions on the migration movement from some perspectives, and provided experimental basis for further research on the conductive mechanism of the soil and measures to reduce resistance.","PeriodicalId":125983,"journal":{"name":"2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131384484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Styrene Grafting Modification on Electrical Tree Characteristics of Polypropylene","authors":"Wenjia Zhang, Guohui Hao, Shixun Hu, Shangshi Huang, Xinhua Dong, Zhidu Huang, Jun Hu, Qi Li, Jinliang He","doi":"10.1109/ICHVE53725.2022.9961646","DOIUrl":"https://doi.org/10.1109/ICHVE53725.2022.9961646","url":null,"abstract":"The electrical treeing characteristics of pure Polypropylene (PP) and two different contents of styrene grafting PP were investigated in this study. The electrical tree inception time result indicates that styrene grafting modification stalls the treeing inception process in PP. The electrical growth statistics show that styrene grafting modification can also slow down the treeing growth rate and the morphology of trees in pure PP and styrene grafting PP is different. The difference of the tree characteristics in these three materials is attributed to the changes of trap level distribution and crystallinity properties. In styrene grating PP, the increases in the level of trap and the density of deep trap together restrict the mobility of electrons and the decrease in the size of spherulite narrows the amorphous region with lower insulation performance comparing to crystalline part, thus, leading to the improvement in the electrical treeing properties.","PeriodicalId":125983,"journal":{"name":"2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132468074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Measurement of Ion Flow Fields Generated by Positive DC Corona Discharge based on E-FISH","authors":"Shen Chen, Jiangong Zhang, Hengxin He, Junru Che, Wanxia Zhang, L. Nie, Weijiang Chen","doi":"10.1109/ICHVE53725.2022.9961388","DOIUrl":"https://doi.org/10.1109/ICHVE53725.2022.9961388","url":null,"abstract":"To accurately measure the ion flow field of atmospheric DC corona discharges is important for optimizing the electromagnetic environment of HVDC overhead transmission lines. Since the distribution of ion flow field may be distorted by the inserting of electric field sensor, existing methods are inadequate for the measurement of electric field generated by corona discharges. In this paper, a non-invasive method based on the electric field induced second harmonic effect (E-FISH) is developed to measure the ion flow field produced by positive dc corona discharges and compare with numerical simulations. Firstly, an electric field measurement system is established according to the principle of E-FISH. Secondly, a calibration procedure for the measurement of non-uniform electric field is proposed by adopting FEM simulation under corona free condition. Finally, the electric field generated by positive DC corona discharge in a rod-plate air gap is measured quantitatively and compared with the results obtained by numerical simulations. The experimental results are in good agreement with the numerical simulation results of corona ion flow field in the rod-plate air gap, which verifies the applicability and accuracy of this method. By comparing experimental results with computational ones, it is demonstrated that the E-FISH method has the potential to be applied in the ion flow field measurement of HVDC transmission lines.","PeriodicalId":125983,"journal":{"name":"2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132556481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CSC-VSC Based Distributed Energy Grid Connection System and Its Control Strategy","authors":"Bing Xia, Zihu Wang, Gang Li, Xiaohua Lv, Guang Yang, Yong Liu","doi":"10.1109/ICHVE53725.2022.9961651","DOIUrl":"https://doi.org/10.1109/ICHVE53725.2022.9961651","url":null,"abstract":"With the aim of carbon footprint reduction and energy internet construction, distributed renewable energies are vigorously developed, emphasizing the optimization and coordination of wind energy, solar energy, electric vehicle battery energy and so on. In order to make full use of the renewable energies and improve the flexibility of the power system, a distributed energy grid connection system based on current source converter (CSC)-voltage source converter (VSC) is proposed in this paper. The topology of the proposed system is introduced firstly. The system adopts CSC to realize partition grid and ac renewable energy connection, and a hybrid DC/DC converter which adopts CSC at the grid side and VSC at the load side to realize dc distributed renewable energy connection. A high-frequency modulation method is proposed to reduce the volume of the DC/DC converter. Then, the mathematical model of the system is analyzed. Based on the mathematical model, a comprehensive control strategy is proposed. The proposed method realizes the flexible power flow regulation in ac/dc distribution network and effective grid connection of distributed energy. Finally, the experimental model of a three-terminal CSC-VSC based distributed energy grid connection system is built on RT-LAB hardware in the loop simulation platform. The experimental results verify the correctness of the proposed system and the effectiveness of the proposed control method.","PeriodicalId":125983,"journal":{"name":"2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130099510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cryogenic high voltage testing of a 25 kV RIS bushing","authors":"S. Fink, R. Müller, V. Zwecker","doi":"10.1109/ICHVE53725.2022.9961329","DOIUrl":"https://doi.org/10.1109/ICHVE53725.2022.9961329","url":null,"abstract":"High voltage bushings used for superconducting power engineering applications are exposed to cryogenic temperature stress. Dry bushings based on low hygroscopic materials are preferable for such an application. Resin impregnated synthetic (RIS) bushings are less hygroscopic than the well-established resin impregnated paper (RIP) bushings and have demonstrated their usability for room temperature high voltage application since few years. A conventional 25 kV, 2 kA room temperature RIS bushing was assembled to an open bath cryostat and subjected to five thermal cycles with liquid nitrogen as coolant. High voltage tests with AC, DC and impulse waveforms were successfully performed under cryogenic and room temperature conditions during these thermal cycles. No degradation of the bushing was found after the thermo-mechanical stress. Only the dissipation factor for the C2 test tap measurement showed a relevant difference to the manufacturer values. This paper focuses on the high voltage testing of the RIS bushing.","PeriodicalId":125983,"journal":{"name":"2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130227881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Molecular dynamics simulation of polydimethylsiloxane under different temperature and electric field","authors":"Wenting Liu, Yonghao Fang, Yu Fan, Xinzhe Yu, Yueneng Xu, Jun Zhou, Chuyan Zhang, Y. Deng","doi":"10.1109/ICHVE53725.2022.9961403","DOIUrl":"https://doi.org/10.1109/ICHVE53725.2022.9961403","url":null,"abstract":"In UHV transmission projects, with the continuous improvement of operating voltage level, the discharge caused by strong electric field intensifies the aging of composite insulator outer insulation material. The composite insulators will be subjected to higher field strength, and the resulting partial discharge may generate higher temperature. Therefore, the study of silicone rubber aging under the action of strong electric field and high temperature is more important, but it is difficult to accurately evaluate the aging characteristics only by relying on macroscopic characteristics. In this paper, a molecular model of polydimethylsiloxane was established based on molecular dynamics simulation to explore the structural evolution and microscopic characteristic variation of siloxane under the action of temperature and electric field, and to further study the change of mechanical properties of silicone rubber. It is found that temperature is negatively correlated with mechanical properties. There is a positive correlation between electric field strength and mechanical properties. This study provides an analytical method for predicting the macroscopic characteristics of silicone rubber material through the microscopic morphology, and then provides a reference for analyzing the microscopic mechanism of composite insulator aging and material optimization selection.","PeriodicalId":125983,"journal":{"name":"2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130455293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Vibration Measurement and Data Analysis on Transformer Site","authors":"C. Long, Zhang Jingzhuo, H. Kaimin, Fang Dachuan, Xia Zhenmin, Pan Zhuohong","doi":"10.1109/ICHVE53725.2022.9961788","DOIUrl":"https://doi.org/10.1109/ICHVE53725.2022.9961788","url":null,"abstract":"As the core equipment of the power system, the safe and stable operation of the transformer is the premise to ensure the stability of the entire power grid. It is of great significance to measure the vibration acceleration of the transformer on site and analyze the measurement data. In this paper, a scheme for measuring the vibration acceleration of transformers on site is given, and the time-displacement curve of the transformer is solved by the method of discrete Fourier transform plus frequency band filtering and the direct integration method. A large amount of data was measured in a 500kV power station, and the measured data were processed accordingly to obtain the analysis results.","PeriodicalId":125983,"journal":{"name":"2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134025216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on Fault Simulation of Hydraulic Spring Circuit Breaker in Low Temperature Environment","authors":"Fuxing Yang, Yifan Fu, Zhiming Zheng, Xinming Ma, Minjun Zhang, Hui Ma, M. Liao","doi":"10.1109/ICHVE53725.2022.9961466","DOIUrl":"https://doi.org/10.1109/ICHVE53725.2022.9961466","url":null,"abstract":"High-voltage circuit breaker (HVCB) is an important control and protection device in the power system. Its failure will affect the safe and stable operation of the power system. Low temperature environment will affect the breaking performance of HVCB, but it is seldom considered in the current fault diagnosis of circuit breaker. In order to study the influence of low temperature, this paper takes hydraulic spring circuit breaker as the object, analyzes the principle of low temperature affecting its breaking performance, builds a fault simulation experimental platform in low temperature environment, and conducts a large number of low temperature fault simulation experiments. Taking the opening/closing time and the opening/closing coil current collected from the experiment as characteristic quantities, the characteristic parameters are extracted and their variation laws are analyzed, found that the low temperature environment can affect the breaking performance of the circuit breaker. With the decrease of temperature, the opening/closing time of the circuit breaker increases, and the temperature has little effect on the characteristic parameters of the coil current. The results of this paper provide a reference for the reliability research and fault diagnosis of HVCB in low temperature areas.","PeriodicalId":125983,"journal":{"name":"2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)","volume":"135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134444904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corona Discharge Detection and Electric Field Analysis of Double-swinging Protectors in 1000 kV UHV Transmission lines","authors":"Ming Liu, Duo Lv, Shanshan Quan, Liang Xie, Peng Liu, Zongren Peng","doi":"10.1109/ICHVE53725.2022.10014457","DOIUrl":"https://doi.org/10.1109/ICHVE53725.2022.10014457","url":null,"abstract":"The double-swinging protectors are the key fittings of UHV transmission lines, which play a role to prevent bundle conductors from galloping in the wind. Corona discharge is prone to occur on its surface because of the structure of double-swinging protectors, which causes noise pollution and power loss. In this paper, ultraviolet imaging technology was used to detect corona discharge of the double-swinging protectors. And the position of corona discharge of the double-swinging protectors was obtained by analyzing ultraviolet images. In order to study the effects of the structure of the double-swinging protector on the electric field distribution and corona discharge suppression of the double-swinging protectors, a 3-D finite element model of the 1000 kV UHV transmission lines with double-swinging protectors was established by COMSOL Multiphysics. The model loaded with peak value of phase voltage was calculated and analyzed. The results show that shortening the effective pendulum length and increasing the pendulum radius can effectively reduce the maximum surface field strength of the double-swinging protectors and suppress corona discharge. In addition, a newly designed double-swinging protectors was proposed to optimize the maximum surface electric field strength of the double-swinging protectors and restrain corona discharge. The work in this paper could provide references for the design and manufacturing of line fittings in 1000 kV UHV transmission lines.","PeriodicalId":125983,"journal":{"name":"2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134601884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}