Pub Date : 2019-06-01DOI: 10.1109/PEDG.2019.8807694
Peng Xiao, Lei Fu, Jiusheng Wang, Guangxue Cui, Liguo Wang
In the pipeline transportation of petroleum, electric heat tracing system is needed to ensure the normal flow of petroleum. The heating efficiency is directly related to the PI parameters of the system.At the same time, if the pressure in the pipeline is not taken into consideration when designing the system , it is easy for the excessive pressure to threaten the normal operation. To solve these problem, this paper proposes to optimize the subject PI parameters of the system, modulate the PI parameters to reduce the pressure when the pressure is high, then apply them to the skin effect electric heat tracing system.
{"title":"Research on optimizing PI parameter of skin effect electric trace heating system based on deep learning","authors":"Peng Xiao, Lei Fu, Jiusheng Wang, Guangxue Cui, Liguo Wang","doi":"10.1109/PEDG.2019.8807694","DOIUrl":"https://doi.org/10.1109/PEDG.2019.8807694","url":null,"abstract":"In the pipeline transportation of petroleum, electric heat tracing system is needed to ensure the normal flow of petroleum. The heating efficiency is directly related to the PI parameters of the system.At the same time, if the pressure in the pipeline is not taken into consideration when designing the system , it is easy for the excessive pressure to threaten the normal operation. To solve these problem, this paper proposes to optimize the subject PI parameters of the system, modulate the PI parameters to reduce the pressure when the pressure is high, then apply them to the skin effect electric heat tracing system.","PeriodicalId":248726,"journal":{"name":"2019 IEEE 10th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126258076","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 : 2019-06-01DOI: 10.1109/PEDG.2019.8807689
Zebin Yang, Jiangnan Chen, Cuicui Liu, Yating Gou, Jiachen Tian, F. Zhuo, Feng Wang
The threat of HEMP (high-altitude nuclear electromagnetic pulse) in power system deserves in-depth study. Saturable reactor acts as a protection device for the thyristor, and its normal operation determines the normal operation of the whole thyristor converter valve. The failure rate of saturable reactor is a key parameter for the overall reliability evaluation, whose value varies according to the electrical stress and thermal stress conditions. In this paper, a precision wideband model considering the different capacitive parasitic parameters of a saturable reactor is proposed. Then, the electrical stress, heat loss and instantaneous temperature rise of the saturable reactor in a single valve are accurately calculated. Finally, the failure mechanism of saturable reactor in HEMP environment is analyzed, which could be used in the further research on the reliability of thyristor converter valve in HEMP environment.
{"title":"Stress Analysis and Reliability Calculation of Saturable Reactor of HVDC Converter Valve in HEMP Environment","authors":"Zebin Yang, Jiangnan Chen, Cuicui Liu, Yating Gou, Jiachen Tian, F. Zhuo, Feng Wang","doi":"10.1109/PEDG.2019.8807689","DOIUrl":"https://doi.org/10.1109/PEDG.2019.8807689","url":null,"abstract":"The threat of HEMP (high-altitude nuclear electromagnetic pulse) in power system deserves in-depth study. Saturable reactor acts as a protection device for the thyristor, and its normal operation determines the normal operation of the whole thyristor converter valve. The failure rate of saturable reactor is a key parameter for the overall reliability evaluation, whose value varies according to the electrical stress and thermal stress conditions. In this paper, a precision wideband model considering the different capacitive parasitic parameters of a saturable reactor is proposed. Then, the electrical stress, heat loss and instantaneous temperature rise of the saturable reactor in a single valve are accurately calculated. Finally, the failure mechanism of saturable reactor in HEMP environment is analyzed, which could be used in the further research on the reliability of thyristor converter valve in HEMP environment.","PeriodicalId":248726,"journal":{"name":"2019 IEEE 10th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133097586","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 : 2019-06-01DOI: 10.1109/PEDG.2019.8807664
Hongxia Guo, Zhijun Ren
The power market reform broke the monopoly operation mode of vertical integration of power grid company, and the open market environment gave birth to diversified market participants. In order to balance the interests of various market entities and maximize the total social benefits. This paper proposes a double-layer optimal configuration model of active distribution network with multiple market entities under power reform. The upper model considers the maximum economic benefits of energy and service providers, including distributed generation investors, distribution companies and energy storage operators, and considers the energy storage operation strategies under different investment entities. The lower model considers the user side economic benefits and ensures maximum user satisfaction through demand response. In this paper, the model is simulated by IEEE33 distribution network system. The results show that the model can effectively improve the interests of various market entities and improve the total social benefits.
{"title":"Double-layer optimal configuration of active distribution network with multiple market entities under power reform","authors":"Hongxia Guo, Zhijun Ren","doi":"10.1109/PEDG.2019.8807664","DOIUrl":"https://doi.org/10.1109/PEDG.2019.8807664","url":null,"abstract":"The power market reform broke the monopoly operation mode of vertical integration of power grid company, and the open market environment gave birth to diversified market participants. In order to balance the interests of various market entities and maximize the total social benefits. This paper proposes a double-layer optimal configuration model of active distribution network with multiple market entities under power reform. The upper model considers the maximum economic benefits of energy and service providers, including distributed generation investors, distribution companies and energy storage operators, and considers the energy storage operation strategies under different investment entities. The lower model considers the user side economic benefits and ensures maximum user satisfaction through demand response. In this paper, the model is simulated by IEEE33 distribution network system. The results show that the model can effectively improve the interests of various market entities and improve the total social benefits.","PeriodicalId":248726,"journal":{"name":"2019 IEEE 10th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133632662","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 : 2019-06-01DOI: 10.1109/pedg.2019.8807659
{"title":"PEDG 2019 Technical Papers","authors":"","doi":"10.1109/pedg.2019.8807659","DOIUrl":"https://doi.org/10.1109/pedg.2019.8807659","url":null,"abstract":"","PeriodicalId":248726,"journal":{"name":"2019 IEEE 10th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127419109","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 : 2019-06-01DOI: 10.1109/PEDG.2019.8807612
Liang Guo, Song Chi, Wenxue Shi
In real-time simulation the most common problems are switching events which is caused by the inconsistent between simulation step and switching time. The traditional algorithm of real-time simulation uses variable step and interpolation to solve the problem, but it is not precise enough when deal with multiple switching events. So the paper divided multiple switching events into two parts and proposed a new algorithm to deal with them. The new algorithm not only improve the precise of simulation but also can be used in real-time, which is proved in the model of three phases inverter that is widely used in microgrid.
{"title":"Algorithms for the Accounting of Multiple Switching Events in Real-Time Simulation of Distributed Power","authors":"Liang Guo, Song Chi, Wenxue Shi","doi":"10.1109/PEDG.2019.8807612","DOIUrl":"https://doi.org/10.1109/PEDG.2019.8807612","url":null,"abstract":"In real-time simulation the most common problems are switching events which is caused by the inconsistent between simulation step and switching time. The traditional algorithm of real-time simulation uses variable step and interpolation to solve the problem, but it is not precise enough when deal with multiple switching events. So the paper divided multiple switching events into two parts and proposed a new algorithm to deal with them. The new algorithm not only improve the precise of simulation but also can be used in real-time, which is proved in the model of three phases inverter that is widely used in microgrid.","PeriodicalId":248726,"journal":{"name":"2019 IEEE 10th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122020790","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 : 2019-06-01DOI: 10.1109/PEDG.2019.8807739
Shoki Fujimoto, S. Obara
On Teuri Island and Yagishiri Island, in Haboro, Hokkaido, local production for energy consumption has become a challenge from the points of view of fuel transportation and conservation of local environment. Due to this, the "Eco Island Concept Demonstration Project" was launched and the introduction of renewable energy is being considered. This study aims at developing an optimal clean energy system on Teuri Island and Yagishiri Island. In this paper, the study of the optimization of the installed capacity and the suppression of frequency variation in the microgrid comprising these two islands was performed. For the optimization of the infrastructure capacity, the objective function of the economics of the system was considered, and the most economically advantageous system with the less environmental impact was found. Because frequency and voltage fluctuations in the system can increase by the introduction of renewable energy, we analyzed the frequency variation and the voltage variation of the Teuri-Yagishiri Microgrid. Then, we considered the introduction of a limited amount of renewable energy.
{"title":"Electricity Quality Analysis of Teuri-Yagishiri Island Microgrid","authors":"Shoki Fujimoto, S. Obara","doi":"10.1109/PEDG.2019.8807739","DOIUrl":"https://doi.org/10.1109/PEDG.2019.8807739","url":null,"abstract":"On Teuri Island and Yagishiri Island, in Haboro, Hokkaido, local production for energy consumption has become a challenge from the points of view of fuel transportation and conservation of local environment. Due to this, the \"Eco Island Concept Demonstration Project\" was launched and the introduction of renewable energy is being considered. This study aims at developing an optimal clean energy system on Teuri Island and Yagishiri Island. In this paper, the study of the optimization of the installed capacity and the suppression of frequency variation in the microgrid comprising these two islands was performed. For the optimization of the infrastructure capacity, the objective function of the economics of the system was considered, and the most economically advantageous system with the less environmental impact was found. Because frequency and voltage fluctuations in the system can increase by the introduction of renewable energy, we analyzed the frequency variation and the voltage variation of the Teuri-Yagishiri Microgrid. Then, we considered the introduction of a limited amount of renewable energy.","PeriodicalId":248726,"journal":{"name":"2019 IEEE 10th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"13 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120855899","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 : 2019-06-01DOI: 10.1109/PEDG.2019.8807502
Jianbo Jiang, Shan-Cheng Pan, X. Zha, L. Hao
Common-mode leakage current and double-line-frequency power oscillation are two major challenges of non-isolated single-phase grid-tied inverters. To overcome these two challenges, this paper proposes a new single-phase single-stage inverter for photovoltaic grid-tied systems, which consist of two switches, three capacitors, two inductors, and one diode. The proposed topology allows the negative pole of the photovoltaic panel to be directly connected to the neutral line of the utility grid so that the common-mode leakage current is eliminated completely. Then a mixed modulation strategy combining pulse width modulation and pulse frequency modulation is proposed to suppress the double-line-frequency power oscillation. Two of the capacitors are utilized to handle the power difference between the AC and DC sides, and the other is utilized to implement zero voltage switching. The proposed inverter is also capable of outputting reactive power. The validity of the proposed inverter is verified by simulation.
{"title":"A New Single-Phase Single-Stage Photovoltaic Grid-Tied Inverter with Leakage Current Eliminating and Power Decoupling","authors":"Jianbo Jiang, Shan-Cheng Pan, X. Zha, L. Hao","doi":"10.1109/PEDG.2019.8807502","DOIUrl":"https://doi.org/10.1109/PEDG.2019.8807502","url":null,"abstract":"Common-mode leakage current and double-line-frequency power oscillation are two major challenges of non-isolated single-phase grid-tied inverters. To overcome these two challenges, this paper proposes a new single-phase single-stage inverter for photovoltaic grid-tied systems, which consist of two switches, three capacitors, two inductors, and one diode. The proposed topology allows the negative pole of the photovoltaic panel to be directly connected to the neutral line of the utility grid so that the common-mode leakage current is eliminated completely. Then a mixed modulation strategy combining pulse width modulation and pulse frequency modulation is proposed to suppress the double-line-frequency power oscillation. Two of the capacitors are utilized to handle the power difference between the AC and DC sides, and the other is utilized to implement zero voltage switching. The proposed inverter is also capable of outputting reactive power. The validity of the proposed inverter is verified by simulation.","PeriodicalId":248726,"journal":{"name":"2019 IEEE 10th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124014064","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}
a novel transformerless boost inverter for standalone photovoltaic generation systems is proposed in this paper. The proposed inverter combines the boost converter with the traditional bridge inverter. The switch S1 can not only realize the boost function but also participate in inverting process. The inverter has a higher voltage gain and good characteristics when the inductor L1 is operated in discontinuous mode (DCM) and the nonpolarized capacitor can be chosen as bus capacitor, which makes the volume smaller and the service life of the inverter is increased. The inverter consists of five switches in which only two switches are operated at high frequency state and a monopole SPWM strategy is used. Therefore, the modulation strategy of switches is very simple and the switching loss is reduced. The principle of inverter is described in detail and the correctness of the theoretical analysis is verified by simulation and experiment.
{"title":"A Transformerless Boost Inverter for Stand-alone Photovoltaic Generation Systems","authors":"Zhixiang Yu, Xuefeng Hu, Meng Zhang, Lezhu Chen, Shunde Jiang","doi":"10.1109/PEDG.2019.8807688","DOIUrl":"https://doi.org/10.1109/PEDG.2019.8807688","url":null,"abstract":"a novel transformerless boost inverter for standalone photovoltaic generation systems is proposed in this paper. The proposed inverter combines the boost converter with the traditional bridge inverter. The switch S1 can not only realize the boost function but also participate in inverting process. The inverter has a higher voltage gain and good characteristics when the inductor L1 is operated in discontinuous mode (DCM) and the nonpolarized capacitor can be chosen as bus capacitor, which makes the volume smaller and the service life of the inverter is increased. The inverter consists of five switches in which only two switches are operated at high frequency state and a monopole SPWM strategy is used. Therefore, the modulation strategy of switches is very simple and the switching loss is reduced. The principle of inverter is described in detail and the correctness of the theoretical analysis is verified by simulation and experiment.","PeriodicalId":248726,"journal":{"name":"2019 IEEE 10th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125764437","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 : 2019-06-01DOI: 10.1109/PEDG.2019.8807641
Yuxin Zhang, Xiong Du, Ying Shi, Cheng Zeng, Junliang Liu, H. Tai
The impedance of three-phase converters is widely used in stability analysis of grid-tied converters system. This paper investigates the frequency coupling effect on impedance scanning of converters in stationary reference frame under nonzero grid impedance condition. In addition, a simple and accurate method of impedance scanning of grid-tied converters is proposed in this paper. The proposed methods injects a single phase perturbation into the Point of Common Coupling (PCC) during two scanning cycles, the self-impedance and accompanying-impedance which are employed to characterize the frequency coupling effect of converter can be acquired in the sequence domain. Simulation results prove that the proposed method is effective, and the measured results can be used as the basis for stability analysis.
{"title":"Impedance Scanning Method of Grid-tied Converters under Nonzero Grid Impedance Condition","authors":"Yuxin Zhang, Xiong Du, Ying Shi, Cheng Zeng, Junliang Liu, H. Tai","doi":"10.1109/PEDG.2019.8807641","DOIUrl":"https://doi.org/10.1109/PEDG.2019.8807641","url":null,"abstract":"The impedance of three-phase converters is widely used in stability analysis of grid-tied converters system. This paper investigates the frequency coupling effect on impedance scanning of converters in stationary reference frame under nonzero grid impedance condition. In addition, a simple and accurate method of impedance scanning of grid-tied converters is proposed in this paper. The proposed methods injects a single phase perturbation into the Point of Common Coupling (PCC) during two scanning cycles, the self-impedance and accompanying-impedance which are employed to characterize the frequency coupling effect of converter can be acquired in the sequence domain. Simulation results prove that the proposed method is effective, and the measured results can be used as the basis for stability analysis.","PeriodicalId":248726,"journal":{"name":"2019 IEEE 10th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126137753","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 : 2019-06-01DOI: 10.1109/PEDG.2019.8807687
Xuefeng Chen, Daolian Chen
This paper presents a novel step-up inverter with wide range varied input DC voltage, and the associated two mode control strategy, which can effectively regulate real and reactive output power. The circuit topology, control strategy, and external characteristic are deeply analyzed. The circuit topology is constituted of n T networks and full-bridge inverter, and the T network can adopt Buck-Boost DC converter or quasi-z source network to boost the input voltage. By using the saturation point and zero point as the control mode shifting points, the two modes achieve smooth transition. Experimental results from a 500VA 96-200VDC/220V50Hz AC inverter prototype show that the proposed inverter has the advantages of bidirectional power flow, boost capacity, high overall conversion efficiency and high quality of output waveform, which can be widely used in the step-up inversion with wide range varied input DC voltage.
{"title":"A Novel Step-up Inverter with Wide Range Varied Input DC Voltage","authors":"Xuefeng Chen, Daolian Chen","doi":"10.1109/PEDG.2019.8807687","DOIUrl":"https://doi.org/10.1109/PEDG.2019.8807687","url":null,"abstract":"This paper presents a novel step-up inverter with wide range varied input DC voltage, and the associated two mode control strategy, which can effectively regulate real and reactive output power. The circuit topology, control strategy, and external characteristic are deeply analyzed. The circuit topology is constituted of n T networks and full-bridge inverter, and the T network can adopt Buck-Boost DC converter or quasi-z source network to boost the input voltage. By using the saturation point and zero point as the control mode shifting points, the two modes achieve smooth transition. Experimental results from a 500VA 96-200VDC/220V50Hz AC inverter prototype show that the proposed inverter has the advantages of bidirectional power flow, boost capacity, high overall conversion efficiency and high quality of output waveform, which can be widely used in the step-up inversion with wide range varied input DC voltage.","PeriodicalId":248726,"journal":{"name":"2019 IEEE 10th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129756039","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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