Pub Date : 2018-04-01DOI: 10.1109/IGBSG.2018.8393537
Ji Zhang, Meifeng Gao, Jiaming Guo, Hong Tian, X. Kong
This paper presents a digital implement method of harmonic optimal pulse width modulation (HOPWM) for the neutral-point clamped (NPC) three-level inverter(TLI), based on digital signal processor (DSP). First, the total stator harmonic current distortion was set as the objective function, harmonic optimal PWM is designed for NPC TLI Second, the optimization toolbox of the matlab software is used to solve the extreme value, with nonlinear constraints of the objective function. Finally, the TMS320F28335 high performance DSP is used to realize the proposed HOPWM for the TLI, and the spectrum of the output phase and line voltage is analyzed. The experimental results indicate the HOPWM can provide good harmonics performance at low switching frequencies.
{"title":"Research on harmonic optimal PWM for NPC three-level voltage inverters","authors":"Ji Zhang, Meifeng Gao, Jiaming Guo, Hong Tian, X. Kong","doi":"10.1109/IGBSG.2018.8393537","DOIUrl":"https://doi.org/10.1109/IGBSG.2018.8393537","url":null,"abstract":"This paper presents a digital implement method of harmonic optimal pulse width modulation (HOPWM) for the neutral-point clamped (NPC) three-level inverter(TLI), based on digital signal processor (DSP). First, the total stator harmonic current distortion was set as the objective function, harmonic optimal PWM is designed for NPC TLI Second, the optimization toolbox of the matlab software is used to solve the extreme value, with nonlinear constraints of the objective function. Finally, the TMS320F28335 high performance DSP is used to realize the proposed HOPWM for the TLI, and the spectrum of the output phase and line voltage is analyzed. The experimental results indicate the HOPWM can provide good harmonics performance at low switching frequencies.","PeriodicalId":356367,"journal":{"name":"2018 3rd International Conference on Intelligent Green Building and Smart Grid (IGBSG)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128274930","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}
Pub Date : 2018-04-01DOI: 10.1109/IGBSG.2018.8393530
Sunan Ge, Yan Yang, Wei Ni, Rui Zhang
The aim of this paper is to propose a multiple ocular artifacts (OAs) removal method using the high order tensor algorithm. Four categories high order tensor methods are adopted to separate the real electroencephalogram (EEG) and ocular signals by underdetermined blind source separation (UBSS) model. The correlation coefficient and the non-negativity are adopted to choose the suitable UBSS algorithm. The ocular components are identified by the kurtosis value after separating between EEG and ocular signals. Then, the free-ocular sources components are reconstructed to EEG without OAs. The simulations show that the proposed method can effectively remove the OAs. At the same time, it also can retain the useful information after removing OAs.
{"title":"Multiple ocular artifacts removal based on high-order statistical tensor algorithm","authors":"Sunan Ge, Yan Yang, Wei Ni, Rui Zhang","doi":"10.1109/IGBSG.2018.8393530","DOIUrl":"https://doi.org/10.1109/IGBSG.2018.8393530","url":null,"abstract":"The aim of this paper is to propose a multiple ocular artifacts (OAs) removal method using the high order tensor algorithm. Four categories high order tensor methods are adopted to separate the real electroencephalogram (EEG) and ocular signals by underdetermined blind source separation (UBSS) model. The correlation coefficient and the non-negativity are adopted to choose the suitable UBSS algorithm. The ocular components are identified by the kurtosis value after separating between EEG and ocular signals. Then, the free-ocular sources components are reconstructed to EEG without OAs. The simulations show that the proposed method can effectively remove the OAs. At the same time, it also can retain the useful information after removing OAs.","PeriodicalId":356367,"journal":{"name":"2018 3rd International Conference on Intelligent Green Building and Smart Grid (IGBSG)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129687189","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}
Pub Date : 2018-04-01DOI: 10.1109/IGBSG.2018.8393546
K. Lay, Ting-Chun Chen
In spite of the widespread use of QR codes in various applications, one problem with them is that they have low human visualization effect. One approach to tackle this problem is QR code beautification, to which this work can be classified as belonging. With the proposed method, original pictures (or big logos) can be embedded into QR codes with no loss in visual quality.
{"title":"Visual QR codes with lossless picture embedding","authors":"K. Lay, Ting-Chun Chen","doi":"10.1109/IGBSG.2018.8393546","DOIUrl":"https://doi.org/10.1109/IGBSG.2018.8393546","url":null,"abstract":"In spite of the widespread use of QR codes in various applications, one problem with them is that they have low human visualization effect. One approach to tackle this problem is QR code beautification, to which this work can be classified as belonging. With the proposed method, original pictures (or big logos) can be embedded into QR codes with no loss in visual quality.","PeriodicalId":356367,"journal":{"name":"2018 3rd International Conference on Intelligent Green Building and Smart Grid (IGBSG)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130054770","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}
Pub Date : 2018-04-01DOI: 10.1109/IGBSG.2018.8393569
T. Zhaohui, X. Zhihong
Low-voltage switch can be divided into contact switch and non-contact switch. Non-contact switch's power consumption is high under high current situation and it has no visible fracture in breaking state. Contact switch has low consumption, strong stability and it has visible fracture in breaking state. Contact switch are widely used in industrial control and power networks. This paper established the virtual prototyping model of a 220V, 50Hz AC contactor and analyze the influence factor of moveable contact bounce.
{"title":"Virtual prototype design of circuit control switch","authors":"T. Zhaohui, X. Zhihong","doi":"10.1109/IGBSG.2018.8393569","DOIUrl":"https://doi.org/10.1109/IGBSG.2018.8393569","url":null,"abstract":"Low-voltage switch can be divided into contact switch and non-contact switch. Non-contact switch's power consumption is high under high current situation and it has no visible fracture in breaking state. Contact switch has low consumption, strong stability and it has visible fracture in breaking state. Contact switch are widely used in industrial control and power networks. This paper established the virtual prototyping model of a 220V, 50Hz AC contactor and analyze the influence factor of moveable contact bounce.","PeriodicalId":356367,"journal":{"name":"2018 3rd International Conference on Intelligent Green Building and Smart Grid (IGBSG)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124741423","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}
Pub Date : 2018-04-01DOI: 10.1109/IGBSG.2018.8393542
B. Sun, Zhe Zhang, M. Andersen
High electron mobility transistor (HEMT) has the advantage of fast switching capability, low power loss and small package design. Gallium Nitride (GaN) HEMT is widely researched in recent years. Accurate characterization and detailed switching analysis are critical for the practical application in power converters. In this paper, a 650V GaN HEMT is tested based on the double pulse tester. Based on the experimental results, the switching transient analysis is given and the phenomenon of Miller plateau shifting is explained. Switching time and switching loss characterization are given as the reference value for converter design.
高电子迁移率晶体管(HEMT)具有开关速度快、功耗低、封装设计小等优点。氮化镓(GaN) HEMT近年来得到了广泛的研究。准确的表征和详细的开关分析对于功率变换器的实际应用至关重要。本文采用双脉冲测试仪对650V GaN HEMT进行了测试。在实验结果的基础上，给出了开关暂态分析，并对米勒高原漂移现象进行了解释。给出了开关时间和开关损耗特性，作为变换器设计的参考值。
{"title":"Switching transient analysis and characterization of GaN HEMT","authors":"B. Sun, Zhe Zhang, M. Andersen","doi":"10.1109/IGBSG.2018.8393542","DOIUrl":"https://doi.org/10.1109/IGBSG.2018.8393542","url":null,"abstract":"High electron mobility transistor (HEMT) has the advantage of fast switching capability, low power loss and small package design. Gallium Nitride (GaN) HEMT is widely researched in recent years. Accurate characterization and detailed switching analysis are critical for the practical application in power converters. In this paper, a 650V GaN HEMT is tested based on the double pulse tester. Based on the experimental results, the switching transient analysis is given and the phenomenon of Miller plateau shifting is explained. Switching time and switching loss characterization are given as the reference value for converter design.","PeriodicalId":356367,"journal":{"name":"2018 3rd International Conference on Intelligent Green Building and Smart Grid (IGBSG)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115997608","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}
Pub Date : 2018-04-01DOI: 10.1109/IGBSG.2018.8393567
Yang Wang, Zhihong Xu
A new method that implements the real-time online detection of breaking time for unipolar contactor is proposed. First of all, fast Fourier transformation (FFT) was employed to determine the characteristic band of arcing moment. After that, the optimal wavelet function was chosen based on the characteristic band, which is applied to feedback the contact instantaneous opening moment. Finally, this paper proposes time and frequency domain criterions to detect the changing point of break operation and finds out that it obtains excellent transient response capability at the time of sudden changes of the contact voltage. Hardware control modules are adopted to verify that the breaking time feedback loop based on the Mallat algorithm can achieve the real-time online feedback for the breaking time of the unipolar contactor. For achieving zero-current breaking, which is of practical significance especially for the batch control, thus eliminating the disadvantage that traditional schemes require prior measurement of the breaking batch contactors.
{"title":"Research on real-time online detection of breaking time for unipolar contactor","authors":"Yang Wang, Zhihong Xu","doi":"10.1109/IGBSG.2018.8393567","DOIUrl":"https://doi.org/10.1109/IGBSG.2018.8393567","url":null,"abstract":"A new method that implements the real-time online detection of breaking time for unipolar contactor is proposed. First of all, fast Fourier transformation (FFT) was employed to determine the characteristic band of arcing moment. After that, the optimal wavelet function was chosen based on the characteristic band, which is applied to feedback the contact instantaneous opening moment. Finally, this paper proposes time and frequency domain criterions to detect the changing point of break operation and finds out that it obtains excellent transient response capability at the time of sudden changes of the contact voltage. Hardware control modules are adopted to verify that the breaking time feedback loop based on the Mallat algorithm can achieve the real-time online feedback for the breaking time of the unipolar contactor. For achieving zero-current breaking, which is of practical significance especially for the batch control, thus eliminating the disadvantage that traditional schemes require prior measurement of the breaking batch contactors.","PeriodicalId":356367,"journal":{"name":"2018 3rd International Conference on Intelligent Green Building and Smart Grid (IGBSG)","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126935861","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}
Pub Date : 2018-04-01DOI: 10.1109/IGBSG.2018.8393555
R. Wai, Yan Yang, Y. Wang
This study focuses on the backstepping control (BSC) design for the direct power control (DPC) of a three-phase voltage-source pulse-width-modulation (PWM) rectifier in the direct-quadrature (d-q) reference frame. Thus, the power factor of the three-phase rectifier can be adjusted by control the instantaneous reactive power and the DC output voltage simulatenously. In the proposed BSC system, it can be divided into two independent backstepping controllers by introducing two virtual control signals, and the corresponding controller parameters can be adjusted independently. As a result, both the stable DC output voltage and the sinusoidal input current with a lower total-harmonic-distorsioin (THD) value can be guaranteed. Moverover, the instantaneous active and reactive power also can be regulated. The effectiveness of the prosed BSC system is verified by numerical simulatios of a 5kW system.
{"title":"Design of backstepping control for direct power control of three-phase PWM rectifier","authors":"R. Wai, Yan Yang, Y. Wang","doi":"10.1109/IGBSG.2018.8393555","DOIUrl":"https://doi.org/10.1109/IGBSG.2018.8393555","url":null,"abstract":"This study focuses on the backstepping control (BSC) design for the direct power control (DPC) of a three-phase voltage-source pulse-width-modulation (PWM) rectifier in the direct-quadrature (d-q) reference frame. Thus, the power factor of the three-phase rectifier can be adjusted by control the instantaneous reactive power and the DC output voltage simulatenously. In the proposed BSC system, it can be divided into two independent backstepping controllers by introducing two virtual control signals, and the corresponding controller parameters can be adjusted independently. As a result, both the stable DC output voltage and the sinusoidal input current with a lower total-harmonic-distorsioin (THD) value can be guaranteed. Moverover, the instantaneous active and reactive power also can be regulated. The effectiveness of the prosed BSC system is verified by numerical simulatios of a 5kW system.","PeriodicalId":356367,"journal":{"name":"2018 3rd International Conference on Intelligent Green Building and Smart Grid (IGBSG)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126043025","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}
Pub Date : 2018-04-01DOI: 10.1109/IGBSG.2018.8393538
Hong Tian, Ji Zhang, Shao-bo Kang, X. Kong
In order to study the performance of indoor and outdoor insulators on flashover, and to preliminarily analyze the factors that influence the flashover performance, 4 types of insulators were selected for experiment. Power frequency voltage was applied to these insulators and various environment conditions were simulated using solid layer method according to national standards. Comparisons were made between outdoor and indoor post insulators, as well as 3 different kinds of outdoor insulators. Conclusions were achieved: the indoor post insulators have a much lower initial discharge voltage comparing to outdoor ones; initial discharge voltage does not decrease too much as long as the surface of the insulator is dry even if its polluted; flashover is much easier to happen if the surface of insulator is wet, especially when its polluted; pollution resisting pin type insulators have the best flashover performance; for one shed on the pin type insulators, initial discharge voltage could be increased for about 24kV in power frequency voltage; initial discharge voltage is positively corelated to the creepage distance of insulators.
{"title":"An experimental study on the flashover of 10kV indoor and outdoor power apparatus insulators","authors":"Hong Tian, Ji Zhang, Shao-bo Kang, X. Kong","doi":"10.1109/IGBSG.2018.8393538","DOIUrl":"https://doi.org/10.1109/IGBSG.2018.8393538","url":null,"abstract":"In order to study the performance of indoor and outdoor insulators on flashover, and to preliminarily analyze the factors that influence the flashover performance, 4 types of insulators were selected for experiment. Power frequency voltage was applied to these insulators and various environment conditions were simulated using solid layer method according to national standards. Comparisons were made between outdoor and indoor post insulators, as well as 3 different kinds of outdoor insulators. Conclusions were achieved: the indoor post insulators have a much lower initial discharge voltage comparing to outdoor ones; initial discharge voltage does not decrease too much as long as the surface of the insulator is dry even if its polluted; flashover is much easier to happen if the surface of insulator is wet, especially when its polluted; pollution resisting pin type insulators have the best flashover performance; for one shed on the pin type insulators, initial discharge voltage could be increased for about 24kV in power frequency voltage; initial discharge voltage is positively corelated to the creepage distance of insulators.","PeriodicalId":356367,"journal":{"name":"2018 3rd International Conference on Intelligent Green Building and Smart Grid (IGBSG)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124891666","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}
Pub Date : 2018-04-01DOI: 10.1109/IGBSG.2018.8393562
Tang Bo, W. Weihua, Zou Fang, Huang Li
A wind turbine placed in the vicinity of the radar system, it would have a serious impact on positioning and tracking of the radar performance. This paper based on the HF radar work principle and used radar cross section(RCS) to evaluate interference level. Take the actual HF radar work band (3–30MHz) to study, according to Hallen method to establish wire model of RCS calculating and used the MoM to calculate the wind turbine far-field scattered field. Then established the wind turbine model at different yaw angel and rotation angel and calculated the wind turbine RCS, finally got the interference characteristics of wind turbine. The results show that wind turbine RCS could be the evaluation parameters to evaluate interference level. The wind turbine RCS changed huge at different yaw angel and rotation angel. When the HF radar frequency at 30MHz, the maximum interference is 51.01dBm2.
{"title":"The interference characteristics of HF radar caused by wind turbine in shortwave frequency","authors":"Tang Bo, W. Weihua, Zou Fang, Huang Li","doi":"10.1109/IGBSG.2018.8393562","DOIUrl":"https://doi.org/10.1109/IGBSG.2018.8393562","url":null,"abstract":"A wind turbine placed in the vicinity of the radar system, it would have a serious impact on positioning and tracking of the radar performance. This paper based on the HF radar work principle and used radar cross section(RCS) to evaluate interference level. Take the actual HF radar work band (3–30MHz) to study, according to Hallen method to establish wire model of RCS calculating and used the MoM to calculate the wind turbine far-field scattered field. Then established the wind turbine model at different yaw angel and rotation angel and calculated the wind turbine RCS, finally got the interference characteristics of wind turbine. The results show that wind turbine RCS could be the evaluation parameters to evaluate interference level. The wind turbine RCS changed huge at different yaw angel and rotation angel. When the HF radar frequency at 30MHz, the maximum interference is 51.01dBm2.","PeriodicalId":356367,"journal":{"name":"2018 3rd International Conference on Intelligent Green Building and Smart Grid (IGBSG)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116355358","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}
Pub Date : 2018-04-01DOI: 10.1109/IGBSG.2018.8393529
Tomáš Košt'ál
This paper concerns usage of an on-line parameter identification method for optimization of power consumption of fan drives with induction machines in air handling units (AHU) of heat, ventilation and air conditioning (HVAC) systems of buildings. Variable frequency drives (VFD) are nowadays a key manner for lowering the consumption of HVAC system in off-peak times. However their controllers don't respect the changes of machine parameters during the operation. Proposed method can enhance the control algorithm of VFD with induction machine to optimize its efficiency. Further it can be implemented also on existing installations as it uses only standard components of the drive.
{"title":"Reducing electrical energy consumption of AHU fans through parameter identification of the drive","authors":"Tomáš Košt'ál","doi":"10.1109/IGBSG.2018.8393529","DOIUrl":"https://doi.org/10.1109/IGBSG.2018.8393529","url":null,"abstract":"This paper concerns usage of an on-line parameter identification method for optimization of power consumption of fan drives with induction machines in air handling units (AHU) of heat, ventilation and air conditioning (HVAC) systems of buildings. Variable frequency drives (VFD) are nowadays a key manner for lowering the consumption of HVAC system in off-peak times. However their controllers don't respect the changes of machine parameters during the operation. Proposed method can enhance the control algorithm of VFD with induction machine to optimize its efficiency. Further it can be implemented also on existing installations as it uses only standard components of the drive.","PeriodicalId":356367,"journal":{"name":"2018 3rd International Conference on Intelligent Green Building and Smart Grid (IGBSG)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123413697","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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