In this paper, a compensation network parameter design method based on multi-objective optimization algorithm has been proposed to meet the robust requirements of the output characteristics of wireless power transfer (WPT) system under non-resonant conditions. The equivalent circuit mathematical model of WPT system under non-resonant condition is established, and the sensitivity of system output characteristics to different component parameters is analyzed. A compensatory topology parameter optimization method of double-sided LCC based on NSGAII algorithm is proposed, which effectively reduces the system output power fluctuation when multiple parameters fluctuate together, improves the output characteristics of the double-sided LCC WPT system, and enhances the robustness of the system output. Finally, the proposed method is validated by comparing the power variation before and after the system parameter optimization under the condition of multi-parameter combined fluctuation and the condition of sensitive parameter random fluctuation. It has lower power variation when component parameter fluctuates randomly and it improves the controllability of the system to a certain extent.
{"title":"Robust optimization of double-sided LCC compensation topology based on NSGAⅡ algorithm","authors":"X. Cui, Shaohua Du, Wanying Zhao, Xinyang Wang, Junjun Deng, Baohua Xu","doi":"10.1117/12.2689723","DOIUrl":"https://doi.org/10.1117/12.2689723","url":null,"abstract":"In this paper, a compensation network parameter design method based on multi-objective optimization algorithm has been proposed to meet the robust requirements of the output characteristics of wireless power transfer (WPT) system under non-resonant conditions. The equivalent circuit mathematical model of WPT system under non-resonant condition is established, and the sensitivity of system output characteristics to different component parameters is analyzed. A compensatory topology parameter optimization method of double-sided LCC based on NSGAII algorithm is proposed, which effectively reduces the system output power fluctuation when multiple parameters fluctuate together, improves the output characteristics of the double-sided LCC WPT system, and enhances the robustness of the system output. Finally, the proposed method is validated by comparing the power variation before and after the system parameter optimization under the condition of multi-parameter combined fluctuation and the condition of sensitive parameter random fluctuation. It has lower power variation when component parameter fluctuates randomly and it improves the controllability of the system to a certain extent.","PeriodicalId":118234,"journal":{"name":"4th International Conference on Information Science, Electrical and Automation Engineering","volume":"135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116810602","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}
The miniaturization and lightweight of wireless EV chargers are of great significance. For the inductive power transfer system based on double-sided LCC compensation topology, an integrated design is proposed in which all the magnetically coupled components and compensation components are integrated into the aluminum shell of wireless chargers. For the quadrature arrangement of DD coils, including the main inductor and compensation inductor, the magnetic field distribution of the magnetic coupler is analyzed, the influence of ferrite thickness is studied, and the optimization method of ferrite shape is presented. Under the condition that the magnetic coupling effect is very little affected, the weight of ferrites in the proposed optimized scheme is reduced by 47% compared with the initial scheme. In the prototype experiment, the DC-DC efficiency reached 95.38% when the output power of the system was 6.93 kW.
{"title":"Optimization of ferrites structure based on integrated coil design for wireless EV charger","authors":"Shuo Wang, Kang Yang, Shan Huang, Boning Zhang, Junjun Deng, Baokun Zhang","doi":"10.1117/12.2689421","DOIUrl":"https://doi.org/10.1117/12.2689421","url":null,"abstract":"The miniaturization and lightweight of wireless EV chargers are of great significance. For the inductive power transfer system based on double-sided LCC compensation topology, an integrated design is proposed in which all the magnetically coupled components and compensation components are integrated into the aluminum shell of wireless chargers. For the quadrature arrangement of DD coils, including the main inductor and compensation inductor, the magnetic field distribution of the magnetic coupler is analyzed, the influence of ferrite thickness is studied, and the optimization method of ferrite shape is presented. Under the condition that the magnetic coupling effect is very little affected, the weight of ferrites in the proposed optimized scheme is reduced by 47% compared with the initial scheme. In the prototype experiment, the DC-DC efficiency reached 95.38% when the output power of the system was 6.93 kW.","PeriodicalId":118234,"journal":{"name":"4th International Conference on Information Science, Electrical and Automation Engineering","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132509152","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}
The dual-PWM frequency control system needs to set a filter on the grid side to suppress harmonic current. By analyzing the difference of operation characteristics between LCL filter and L filter, the parameters of L filter are optimized in order to reduce the volume of rectifier, taking into account the filtering effect, current fast tracking ability and system fast response ability; A PWM rectifier control algorithm based on L-filter is proposed, and the parameters of voltage and current loop controller are adjusted to realize the control of fast current tracking, stable voltage output and power factor of 1 on the grid side. The simulation and experimental results verify the correctness of L-filter design and the effectiveness of PWM rectifier control algorithm
{"title":"Mine-using research of PWM rectifier control algorithm based on L filter","authors":"Yue Wang, Hanjie Shi","doi":"10.1117/12.2689450","DOIUrl":"https://doi.org/10.1117/12.2689450","url":null,"abstract":"The dual-PWM frequency control system needs to set a filter on the grid side to suppress harmonic current. By analyzing the difference of operation characteristics between LCL filter and L filter, the parameters of L filter are optimized in order to reduce the volume of rectifier, taking into account the filtering effect, current fast tracking ability and system fast response ability; A PWM rectifier control algorithm based on L-filter is proposed, and the parameters of voltage and current loop controller are adjusted to realize the control of fast current tracking, stable voltage output and power factor of 1 on the grid side. The simulation and experimental results verify the correctness of L-filter design and the effectiveness of PWM rectifier control algorithm","PeriodicalId":118234,"journal":{"name":"4th International Conference on Information Science, Electrical and Automation Engineering","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134400999","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}
Weichao Ou, Jinrong Chen, Feng Liao, Yueqiang Wang
The reliability of data transmission in traditional protection systems mainly depends on the redundant realization of the communication network. The protection devices in the system do not have the capability and transmission mechanism for redundant data transmission. In order to solve this problem, this paper proposes a data redundancy transmission method based on protection devices, so that the protection devices in the system can be directly connected to each other and data transmission can be realized. Through the repeated transmission and reception of data by different communication ports of each protection device, a set of multi-port data dynamic transmission strategy based on protection device is established, forming a redundant transmission method that does not depend on network communication equipment. This method reduces equipment costs while improving communication efficiency and reliability.
{"title":"Research on redundant transmission method of distribution network protection data based on device direct connection","authors":"Weichao Ou, Jinrong Chen, Feng Liao, Yueqiang Wang","doi":"10.1117/12.2689749","DOIUrl":"https://doi.org/10.1117/12.2689749","url":null,"abstract":"The reliability of data transmission in traditional protection systems mainly depends on the redundant realization of the communication network. The protection devices in the system do not have the capability and transmission mechanism for redundant data transmission. In order to solve this problem, this paper proposes a data redundancy transmission method based on protection devices, so that the protection devices in the system can be directly connected to each other and data transmission can be realized. Through the repeated transmission and reception of data by different communication ports of each protection device, a set of multi-port data dynamic transmission strategy based on protection device is established, forming a redundant transmission method that does not depend on network communication equipment. This method reduces equipment costs while improving communication efficiency and reliability.","PeriodicalId":118234,"journal":{"name":"4th International Conference on Information Science, Electrical and Automation Engineering","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131696285","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}
With the increase of the share of wind power in energy distribution, accurate ultra-short term wind power prediction results play key role in the optimal real-time scheduling of the power grid. A stacking integration method is proposed based on error correction in this paper. First, the support vector machine for regression (SVR), gradient boosting decision tree (GBDT), multilayer perceptron (MLP) and random forest (RF) are selected as the base models. Then, the linear regression is utilized as the meta-model. The error generated by the base model in the verification set and the spliced verification set are introduced into the training set of the meta-model. Finally, the prediction results and prediction errors in the prediction set are applied to the meta-model to predict the ultra-short term wind power. The experiment results show that the effectiveness of the proposed method by using the real wind power data.
{"title":"Ultra-short term wind power prediction based on an error correction stacking method","authors":"Ziqi Zhang, Yunfei Ding, Jin Yang","doi":"10.1117/12.2689397","DOIUrl":"https://doi.org/10.1117/12.2689397","url":null,"abstract":"With the increase of the share of wind power in energy distribution, accurate ultra-short term wind power prediction results play key role in the optimal real-time scheduling of the power grid. A stacking integration method is proposed based on error correction in this paper. First, the support vector machine for regression (SVR), gradient boosting decision tree (GBDT), multilayer perceptron (MLP) and random forest (RF) are selected as the base models. Then, the linear regression is utilized as the meta-model. The error generated by the base model in the verification set and the spliced verification set are introduced into the training set of the meta-model. Finally, the prediction results and prediction errors in the prediction set are applied to the meta-model to predict the ultra-short term wind power. The experiment results show that the effectiveness of the proposed method by using the real wind power data.","PeriodicalId":118234,"journal":{"name":"4th International Conference on Information Science, Electrical and Automation Engineering","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130295446","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}
With the increasing reliability of power supply in distribution networks, loop closing operation is often required to achieve non-stop load transfer. Firstly, the loop closing device based on improved phase shifting transformer (IPST) can be effectively used in complex loop closing scenarios such as three-phase asymmetry and voltage magnitude difference between the buses on both sides of the loop closing point of the distribution network, considering that the internal impedance of the loop closing device has a certain influence on the quality of the loop transfer voltage. Secondly, the mathematical model of IPST equivalent impedance is established based on the basic principle of transformer, and the expressions of IPST equivalent impedance calculation and the factors affecting the size are derived and analyzed. Finally, the correctness of the proposed IPST-based impedance calculation expression for the loop closing device is verified by MATLAB and PSCAD/EMTDC simulation platform.
{"title":"Impedance characteristics of loop closing device based on improved phase shifting transformer","authors":"Zhi Xu, Jianxiong Tang, Hongsheng Ma, Yupeng Jiang, Junpeng Li, Yongchun Yang","doi":"10.1117/12.2689880","DOIUrl":"https://doi.org/10.1117/12.2689880","url":null,"abstract":"With the increasing reliability of power supply in distribution networks, loop closing operation is often required to achieve non-stop load transfer. Firstly, the loop closing device based on improved phase shifting transformer (IPST) can be effectively used in complex loop closing scenarios such as three-phase asymmetry and voltage magnitude difference between the buses on both sides of the loop closing point of the distribution network, considering that the internal impedance of the loop closing device has a certain influence on the quality of the loop transfer voltage. Secondly, the mathematical model of IPST equivalent impedance is established based on the basic principle of transformer, and the expressions of IPST equivalent impedance calculation and the factors affecting the size are derived and analyzed. Finally, the correctness of the proposed IPST-based impedance calculation expression for the loop closing device is verified by MATLAB and PSCAD/EMTDC simulation platform.","PeriodicalId":118234,"journal":{"name":"4th International Conference on Information Science, Electrical and Automation Engineering","volume":"38 3-4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130312077","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}
It is particularly important to improve specific energy of the power system, lightweight design of battery box before battery technology has made a major breakthrough. The paper uses Hypermesh software to analyze and solve the multiple working conditions of battery upper box. According to analysis results, OptiStruct software was used to optimize the shape of upper box. Through the reasonable arrangement of stiffeners, the mass of battery upper box was reduced by 12.1%, and the first-order natural frequency was increased by 5% to meeting the design requirements. This optimization scheme has certain reference significance for the design of battery upper box.
{"title":"Topography optimization of battery upper box based on OptiStruct","authors":"Xiaojuan Lin, Jianwen Cai, Linjun Tong, Z. Long","doi":"10.1117/12.2690097","DOIUrl":"https://doi.org/10.1117/12.2690097","url":null,"abstract":"It is particularly important to improve specific energy of the power system, lightweight design of battery box before battery technology has made a major breakthrough. The paper uses Hypermesh software to analyze and solve the multiple working conditions of battery upper box. According to analysis results, OptiStruct software was used to optimize the shape of upper box. Through the reasonable arrangement of stiffeners, the mass of battery upper box was reduced by 12.1%, and the first-order natural frequency was increased by 5% to meeting the design requirements. This optimization scheme has certain reference significance for the design of battery upper box.","PeriodicalId":118234,"journal":{"name":"4th International Conference on Information Science, Electrical and Automation Engineering","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133965501","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}
The probabilistic amplitude shaping(PAS) scheme based on amplitude shift keying(ASK) has attracted much attention as a signal-shaping solution. However, due to the limitation of nonlinear effects in practical applications, the robustness of the ASK modulation scheme is far worse than amplitude and phase shift keying(APSK) modulation. Therefore, we design a distributed mapping scheme based on APSK and propose the corresponding PAS scheme. To find the balance between the rate loss and the shaping gain brought by the shaping scheme, this paper utilizes Monte Carlo to simulate and successfully verify that the proposed scheme performs well at different transmission rates, with a maximum of 0.67 dB.
{"title":"A probabilistic amplitude shaping scheme on amplitude and phase shift keying modulation","authors":"Xiangrui Meng, Chao Dong","doi":"10.1117/12.2689810","DOIUrl":"https://doi.org/10.1117/12.2689810","url":null,"abstract":"The probabilistic amplitude shaping(PAS) scheme based on amplitude shift keying(ASK) has attracted much attention as a signal-shaping solution. However, due to the limitation of nonlinear effects in practical applications, the robustness of the ASK modulation scheme is far worse than amplitude and phase shift keying(APSK) modulation. Therefore, we design a distributed mapping scheme based on APSK and propose the corresponding PAS scheme. To find the balance between the rate loss and the shaping gain brought by the shaping scheme, this paper utilizes Monte Carlo to simulate and successfully verify that the proposed scheme performs well at different transmission rates, with a maximum of 0.67 dB.","PeriodicalId":118234,"journal":{"name":"4th International Conference on Information Science, Electrical and Automation Engineering","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127679520","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}
For multipath effects and frequency fading of channels in indoor visible light communication systems. In this paper, an improved LMS algorithm is proposed to compensate for the channel. First, the channel model of indoor visible light communication and the simulation model of orthogonal frequency division multiplexing (OFDM) are built.The simulation verifies the effect of eigenvalue distribution, filter order and step size on the LMS algorithm. Secondly, the NLMS algorithm proposed in this paper solves, to a certain extent, the inherent contradiction that the convergence speed and steady-state error of the LMS algorithm cannot be reasonably coordinated. The simulation results show that: The algorithm improves the convergence speed and reduces the computational complexity compared with the LMS algorithm, which effectively improves the performance of visible light communication systems.
{"title":"Research on the equalization algorithm of indoor visible light communication","authors":"Guolu Huang, P. Li, Yuru Wang, Z. Lan","doi":"10.1117/12.2689451","DOIUrl":"https://doi.org/10.1117/12.2689451","url":null,"abstract":"For multipath effects and frequency fading of channels in indoor visible light communication systems. In this paper, an improved LMS algorithm is proposed to compensate for the channel. First, the channel model of indoor visible light communication and the simulation model of orthogonal frequency division multiplexing (OFDM) are built.The simulation verifies the effect of eigenvalue distribution, filter order and step size on the LMS algorithm. Secondly, the NLMS algorithm proposed in this paper solves, to a certain extent, the inherent contradiction that the convergence speed and steady-state error of the LMS algorithm cannot be reasonably coordinated. The simulation results show that: The algorithm improves the convergence speed and reduces the computational complexity compared with the LMS algorithm, which effectively improves the performance of visible light communication systems.","PeriodicalId":118234,"journal":{"name":"4th International Conference on Information Science, Electrical and Automation Engineering","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128499541","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}
Accurate prediction of fire environment changes is helpful to accurately grasp the development trend of fire and ensure the safety of personnel. It is difficult to establish an accurate prediction model because of the coexistence of multiple parameters, complex coupling relationship, time series and nonlinearity of fire environment. In this paper, long shortterm memory network model (LSTM) based on improved Harris Hawk algorithm (CHHO) is proposed to achieve accurate prediction of fire environment data. Then, CHHO is used to optimize the hyperparameters in LSTM, and the fire temperature is predicted based on the optimized parameters. The experimental results show that the method of CHHO automatic parameter selection solves the problem of manual selection of LSTM model parameters and gives full play to the best performance of the model. The five environmental parameters of indoor fire temperature was predicted. The average fitting effect of CHHO-LSTM reached 94 %. The results show that the model has high prediction accuracy.
{"title":"Research on fire prediction model based on improved Harris hawk optimization algorithm","authors":"Yong-dong Wang, Kai-Xin Yuan, Xiangrui Cao","doi":"10.1117/12.2689496","DOIUrl":"https://doi.org/10.1117/12.2689496","url":null,"abstract":"Accurate prediction of fire environment changes is helpful to accurately grasp the development trend of fire and ensure the safety of personnel. It is difficult to establish an accurate prediction model because of the coexistence of multiple parameters, complex coupling relationship, time series and nonlinearity of fire environment. In this paper, long shortterm memory network model (LSTM) based on improved Harris Hawk algorithm (CHHO) is proposed to achieve accurate prediction of fire environment data. Then, CHHO is used to optimize the hyperparameters in LSTM, and the fire temperature is predicted based on the optimized parameters. The experimental results show that the method of CHHO automatic parameter selection solves the problem of manual selection of LSTM model parameters and gives full play to the best performance of the model. The five environmental parameters of indoor fire temperature was predicted. The average fitting effect of CHHO-LSTM reached 94 %. The results show that the model has high prediction accuracy.","PeriodicalId":118234,"journal":{"name":"4th International Conference on Information Science, Electrical and Automation Engineering","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128685000","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}
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