Wenjie Huang, Rongkun Wang, Yujia Zhuang, Zhixin Wang, Quankai Du
{"title":"Adaptive Harmonic Detection of Active Power Filter based on Improved VMD","authors":"Wenjie Huang, Rongkun Wang, Yujia Zhuang, Zhixin Wang, Quankai Du","doi":"10.1109/CIEEC54735.2022.9845851","DOIUrl":"https://doi.org/10.1109/CIEEC54735.2022.9845851","url":null,"abstract":"Harmonic detection accuracy is the key factor affecting the performance of active power filter (APF). As an effective harmonic detection method, any complex signal can be adaptively decomposed into several intrinsic mode functions (IMFs) with a certain bandwidth by Variational Mode Decomposition (VMD). Aiming at the problems that VMD will be affected under the background of strong noise and the parameters are difficult to determine, an adaptive harmonic detection method based on twice VMD is proposed in this paper. Firstly, the proposed method uses VMD with a fixed decomposition layer A of 2 for denoising. Secondly, the VMD parameters are optimized from the perspective of IMF energy, and the second VMD decomposition is performed on the denoised signal. The simulation results show that, compared with EMD, EEMD and VMD, the proposed method can not only effectively reduce the fundamental extraction error, but also be suitable for aperiodic and non-stationary signals. It shows that the harmonic detection accuracy of APF can be effectively improved by this method.","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121774753","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}
Mengjia Cao, Qingsong Wang, F. Deng, M. Cheng, G. Buja
{"title":"Control and Stability Analysis of Multi-Parallel Single-Phase Electric Springs","authors":"Mengjia Cao, Qingsong Wang, F. Deng, M. Cheng, G. Buja","doi":"10.1109/CIEEC54735.2022.9846508","DOIUrl":"https://doi.org/10.1109/CIEEC54735.2022.9846508","url":null,"abstract":"To expand the capacity of electric spring (ES) and improve the ability of critical load voltage control, a multi-ES parallel structure is proposed. Concerning the control and operation stability problem of multi-parallel ESs, a method to realize reactive power compensation in the parallel system is advanced, and the stability of the system is studied. Firstly, the topology of the multi-ES parallel system and the phase control strategy suitable for the structure are introduced. Then, by applying impedance modeling, the mathematical models of a single ES and its parallel system are established, and the impact of controller parameters on the stability of the system is discussed by utilizing impedance analysis method. Finally, the correctness of the theoretical analysis is verified by the establishment of a simulation model with three-parallel ESs.","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115852735","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}
Huan Huang, Yan Hong Xiao, Siwu Yu, X. Mao, Bin Li, Lei Liu, C. Peng, Hao Du
{"title":"research on lightning protection and grounding safety evaluation of base station shared power tower","authors":"Huan Huang, Yan Hong Xiao, Siwu Yu, X. Mao, Bin Li, Lei Liu, C. Peng, Hao Du","doi":"10.1109/CIEEC54735.2022.9846165","DOIUrl":"https://doi.org/10.1109/CIEEC54735.2022.9846165","url":null,"abstract":"Building 5g base station on power tower is an effective way to realize resource integration and save national resources. However, the voltage level and installed capacity of power system and communication system are far from each other. We must take into account their lightning protection and grounding requirements, conduct comprehensive research, and put forward reliable measures to ensure the safe operation of shared tower. Based on the structure of 220kV power tower and communication machine room, the simulation model of shared tower is established, and multiple observation potentials are set in the shared tower. By analyzing and calculating the ground potential appreciation of observation points under different lightning currents, different earth resistivity and different installation positions, an important conclusion is drawn: in order to ensure the power line in communication machine room The optical cable, antenna metal support and iron tower will not be broken down. The grounding grid of communication machine room and power tower must adopt the joint grounding mode, and the improvement suggestions for the original grounding mode are put forward.","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115805119","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}
Yongjian Xiang, Yunhui Xu, Tao Zhou, Zhongjian Dai, B. Ren, Lei Zhang
{"title":"Improved Comprehensive Inertial Control for ESS Participating Primary Frequency Regulation Based on Fuzzy Control","authors":"Yongjian Xiang, Yunhui Xu, Tao Zhou, Zhongjian Dai, B. Ren, Lei Zhang","doi":"10.1109/CIEEC54735.2022.9846575","DOIUrl":"https://doi.org/10.1109/CIEEC54735.2022.9846575","url":null,"abstract":"ESS (energy storage system) has many advantages such as flexible control, large throughput capacity and fast response speed and can provide strong support for system frequency stability with larger-scale renewable energy. In order to enhance the frequency regulation effect of ESS, this paper proposes an improved comprehensive inertia control strategy based on FC (fuzzy control). The conventional droop control is replaced by fuzzy control to improve the regulation performance and adaptivity of the whole process. SOC (state of charge) is adopted as the input of FC to consider the secure and stable constraints of ESS. In addition, FC is also applied to adjust the virtual inertia coefficients online. The proposed strategy combines the advantages of comprehensive inertial control and adaptive control and improve the frequency supporting ability of ESS under different operation conditions. Finally, simulations are conducted to demonstrate the feasibility of the proposed method.","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115952622","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":"Two-Dimensional Free Positioning Wireless Charging System Based on Tilted Long-Track Transmitting Coil Array","authors":"Yiming Zhang, Yuanchao Wu, Wenbin Pan, Hui Wang, Zhiwei Shen, Xin Li","doi":"10.1109/CIEEC54735.2022.9845871","DOIUrl":"https://doi.org/10.1109/CIEEC54735.2022.9845871","url":null,"abstract":"As an emerging technology, wireless power transfer (WPT) can be applied in many fields such as consumer electronics. Due to the limited charging area, the user experience of wireless charging for consumer electronics needs to be enhanced. Based on the tilted long-track transmitting coil array, this paper proposes a high-degree-of-freedom WPT system to achieve free positioning wireless charging when the receiver is placed horizontally on the charging plane. Using long-track transmitting coils can enlarge the charging area along the track direction. Using the transmitting coil array and supplying power via two adjacent transmitting coils when the receiver is placed in between the transmitting coils can enhance the charging area along the direction perpendicular to the track direction. The adopted LCC-S (inductor-capacitor-capacitor-series) topology facilitates wireless charging with a weak coupling. The proposed system can achieve free positioning wireless charging horizontally, based on a limited number of transmitting coils and no selection switches. The experimental results have validated the proposed WPT system.","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132250643","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":"Degradation of Pesticide Residues in Apples by Dielectric Barrier Discharge Plasma Device","authors":"Jie Yu, Xingquan Wang, L. Yuan","doi":"10.1109/CIEEC54735.2022.9846158","DOIUrl":"https://doi.org/10.1109/CIEEC54735.2022.9846158","url":null,"abstract":"This paper demonstrates a device with crossed electrode array by dielectric barrier discharge (DBD). The device was used for the degradation experiments of pesticide residues on the apples’ surface. The apples were analyzed using infrared hyperspectral imaging. The results show that the purification efficiency of pesticide residues is more than 92%, and the purification efficiency of emamectin benzoate (A) is up to 99.99%. The color, flavor and nutritional value of the apples are not significantly affected. The condition required for the experiment is that the flow rate of air gas is 2 L/min. In additions, the frequency of power is 6.5 kHz and the optimal discharge voltage (peak-to-peak voltage) is 15.6 kV. Therefore, the device offers a new approach to fruits and vegetable purification and other research fields.","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132529001","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}
Buyang Du, Jianhang Zhu, Jiabing Hu, Ze-Hong Guo, Dejun Shao, Youping Xu, Mengxuan Shi
{"title":"Subsynchronous Oscillation Research of LCC-HVDC Receiving End System with Large-scale Renewable Power Generation","authors":"Buyang Du, Jianhang Zhu, Jiabing Hu, Ze-Hong Guo, Dejun Shao, Youping Xu, Mengxuan Shi","doi":"10.1109/CIEEC54735.2022.9846562","DOIUrl":"https://doi.org/10.1109/CIEEC54735.2022.9846562","url":null,"abstract":"The line-commutated-converter (LCC) based high voltage direct current (HVDC), and renewable power generation have developed rapidly in central China. However, the risk of subsynchronous oscillation (SSO) for this typical LCC-HVDC receiving end system with large-scale renewable power generations (LCCre-RPGs) is unclear. In this paper, a small-signal model of LCCre-RPGs is constructed. The renewable power generations are simulated by a permanent magnet synchronous generator (PMSG) and a doubly-fed induction generator (DFIG). Then, the interaction between LCC-HVDC and renewable power generations is analyzed through the eigenvalue analysis and participation factor analysis. Moreover, the interaction may lead to the risk of SSO. Finally, the influence of controller parameters on the SSO modes is investigated in detail, which provides theoretical support for optimizing relevant parameters. The time-domain simulation of the original nonlinear model verifies the above analysis results.","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134268011","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 Power Cable Life-Cycle Management and Control System Based on Function-Enhanced Location-Measurement Temperature-Sensed Chip","authors":"Guangling Chen, Chenggang Li, Wei Liu, Miao Li, Jianhua Zhen, K. Dong, Jianfeng Zhao","doi":"10.1109/CIEEC54735.2022.9845968","DOIUrl":"https://doi.org/10.1109/CIEEC54735.2022.9845968","url":null,"abstract":"The life-cycle management and control of power cable is an effective solution to coordinate the important links of power cable intelligent manufacturing, material procurement, warehousing & logistics, construction, operation & maintenance and decommissioning. Also, it is a technical path to improve the level of power cable material management and even the intelligent management and control of power grid. Its large-scale industrial scale determines that power cables serve as an important role of green manufacturing and intelligent construction of green economy. In recent years, the extensive research on the life-cycle management and control of power cables has achieved abundant achievements, especially in the direction of using sensor chips realizing the direction of data identification and data-link penetration, and many attempts with the usage of reference have been carried out. Starting with the new development concept of power materials, this paper describes in details the technical form and practical form of the life-cycle management and control system of power cables. On this basis, a systematic plan for the key technical problems such as the business management system of the life-cycle of power cable in the power scenario, the performance index of built-in intelligent chip, function-enhanced location-measurement temperature-sensed chip and built-in intelligent power cable have been studied, and the development prospect of the life-cycle management and control system of power cable in the future has been described, which lays out the technical foundation and development direction of data penetration and business intelligence for the further expansion and deepening of power material management system.","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134417780","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":"Study on the Immersion Oil Cooling Method of Power Module","authors":"Fengtao Yang, Chaohui Liu, Tianyu Wu, Guidong Xiu, Jinliang Shen, Liman Xiong","doi":"10.1109/CIEEC54735.2022.9845896","DOIUrl":"https://doi.org/10.1109/CIEEC54735.2022.9845896","url":null,"abstract":"The water cooling method for traditional power modules will increase the volume of the cooling system additionally. And the thermal resistance of the internal ceramic conductive substrate becomes a bottleneck to further improve the cooling capability of the module. In this paper, the heat dissipation method using immersion oil cooling (IOC) is proposed, which directly flows the insulating oil through the cavity of the power module, and directly dissipates heat from the power dies and the ceramic conductive substrate, thereby reducing the additional heat conduction path. To further optimize the heat dissipation capacity of IOC, this paper mainly studies the open hole specifications of the oil inlet and outlet, internal integrated heat sink, and advanced packaging. The results show that IOC can well assume the function of insulation and heat exchange with the outside.","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133998966","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":"Fault Cause Analysis of Elbow Cable Joint of 10kV Pole-Type Transformer caused by Grounding Non-standard","authors":"Ruoxi Liu, Yue Wang, Tian Chen, Yukun Niu","doi":"10.1109/CIEEC54735.2022.9846739","DOIUrl":"https://doi.org/10.1109/CIEEC54735.2022.9846739","url":null,"abstract":"This paper introduces the basic structure of elbow cable joint of 10kV pole-type transformer. By actual measurement and laboratory simulation, author emphatically analyzes the incorrect grounding of pole-type transformer, which is an important reason for the fault causes. At last, the solutions and preventive measures are put forward.","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"216 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134372315","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}