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Performance analysis of Z-source inverter operating under random PWM 随机PWM下z源逆变器的性能分析
2015 50th International Universities Power Engineering Conference (UPEC) Pub Date : 2015-12-03 DOI: 10.1109/UPEC.2015.7339844
Sambasivam Bhuvanasundaram, Y. Vagapov, A. Anuchin, Cedric Belloc
{"title":"Performance analysis of Z-source inverter operating under random PWM","authors":"Sambasivam Bhuvanasundaram, Y. Vagapov, A. Anuchin, Cedric Belloc","doi":"10.1109/UPEC.2015.7339844","DOIUrl":"https://doi.org/10.1109/UPEC.2015.7339844","url":null,"abstract":"The paper provides performance analysis of an induction motor drive fed by a Z-source inverter operating under random pulse width modulation. The paper also provides a description of control techniques based on a random pulse position PWM obtained using a triangular carrier waveform. The control algorithm has characteristics of both space vector and random lead-lag modulations. The random PWM signal is generated using pseudorandom binary sequence bits and the PWM pulses obtained from a comparison of two fixed frequency triangular carrier waveforms and a reference voltage. The control technique has been applied to a Matlab/Simulink model of the induction motor drive which has been simulated and analysed. The results showed that the harmonics of a Z-source inverter output are dispersed and continuously distributed across the spectrum.","PeriodicalId":446482,"journal":{"name":"2015 50th International Universities Power Engineering Conference (UPEC)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125153793","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}
引用次数: 0
Estimating the true GHG emissions reduction due to electric vehicles integration 估算由于电动汽车整合而减少的温室气体排放量
2015 50th International Universities Power Engineering Conference (UPEC) Pub Date : 2015-12-03 DOI: 10.1109/UPEC.2015.7339804
R. Oliyide, C. Marmaras, E. Xydas, L. Cipcigan
{"title":"Estimating the true GHG emissions reduction due to electric vehicles integration","authors":"R. Oliyide, C. Marmaras, E. Xydas, L. Cipcigan","doi":"10.1109/UPEC.2015.7339804","DOIUrl":"https://doi.org/10.1109/UPEC.2015.7339804","url":null,"abstract":"Unabated emission of greenhouse gases (GHGs) and its attendant climate change consequences can adversely affect the present and future generations. The energy and the transportation sectors have been identified as the two largest producers of the GHGs emissions due to their massive dependence on fossil fuels. Deployment of Renewable Energy Sources (RES) in Distributed Generation (DG) of electricity and integration of Electric vehicles (EVs) in the transportation sector have been suggested as means of reducing the GHGs emissions. There are concerns, however, about EVs reducing emissions in the transportation sector and increasing the same in the power sector. This paper, therefore, presents an algorithm to empirically estimate the annual Real-Emissions-Reduction (RER) in the UK due to EVs integration from the year 2009 to 2013. The algorithm computes and compares the Apparent-Emissions-Reduction (AER) due to EVs in the transportation sector and the emissions due to EVs at the power stations to give the RER. Results from the algorithm and the implications of the figures are then discussed.","PeriodicalId":446482,"journal":{"name":"2015 50th International Universities Power Engineering Conference (UPEC)","volume":"149 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117289576","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}
引用次数: 2
Nonlinear adaptive control design for the VSC-HVDC light transmission system VSC-HVDC输电系统非线性自适应控制设计
2015 50th International Universities Power Engineering Conference (UPEC) Pub Date : 2015-12-03 DOI: 10.1109/UPEC.2015.7339905
Y. Sang, B. Yang, L. Jiang
{"title":"Nonlinear adaptive control design for the VSC-HVDC light transmission system","authors":"Y. Sang, B. Yang, L. Jiang","doi":"10.1109/UPEC.2015.7339905","DOIUrl":"https://doi.org/10.1109/UPEC.2015.7339905","url":null,"abstract":"This paper proposes a nonlinear adaptive control (NAC) scheme for the voltage source converter based high voltage direct current (VSC-HVDC) light transmission system to handle various system uncertainties. The combinatorial effect of system nonlinearity, parameter uncertainties and external disturbances is aggregated into a perturbation term, which is estimated online by a perturbation observer (PO). The NAC is based on the nonlinearly functional estimation which does not require an accurate system model and only one state measurement is needed, thus it can be easily implemented in practice. The proposed approach is then applied in a standard VSC-HVDC light transmission system to maintain the DC voltage and regulate the active and reactive power. Case study has been carried out to verify its effectiveness under various operating conditions.","PeriodicalId":446482,"journal":{"name":"2015 50th International Universities Power Engineering Conference (UPEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117216676","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}
引用次数: 4
Controlled switching to mitigate power transformers inrush current phenomenon 控制开关减轻电力变压器涌流现象
2015 50th International Universities Power Engineering Conference (UPEC) Pub Date : 2015-12-03 DOI: 10.1109/UPEC.2015.7339891
S. M. M. Mirkalaei, F. Hashiesh
{"title":"Controlled switching to mitigate power transformers inrush current phenomenon","authors":"S. M. M. Mirkalaei, F. Hashiesh","doi":"10.1109/UPEC.2015.7339891","DOIUrl":"https://doi.org/10.1109/UPEC.2015.7339891","url":null,"abstract":"During energisation of a power transformer, inrush current phenomenon happens which is able to be ended up with a collection of undesirable consequences. This inrush current could lead to mal-operation of protection system, considerable stresses over transformer (electrical, mechanical and thermal stresses) and electrical transient tension on the power system network. Accordingly, transformer energisation and inrush current phenomenon has to be studied in order to find a solution for mitigating these effects. This paper highlights a real case study that shows the inrush current phenomenon for a 400kV network. Energisation of two super grid transformers, which are in a banked arrangement, will be demonstrated using EMTP. The paper will highlight different switching scenarios and analyses the results to show the effects of the inrush currents. The Point-on-wave switching (POW) device will be proposed as a method of controlled switching to mitigate the inrush currents' effects. In addition, the effect of inaccuracies in the POW timing will be assessed. Conclusion shows Point-On-Wave switching with consideration of tolerance in CB (Circuit Breaker) timing is still a good means for inrush current reduction.","PeriodicalId":446482,"journal":{"name":"2015 50th International Universities Power Engineering Conference (UPEC)","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115604173","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}
引用次数: 2
Phase balancing by means of electric vehicles single-phase connection shifting in a low voltage Danish grid 丹麦低压电网中电动汽车单相连接移位相平衡
2015 50th International Universities Power Engineering Conference (UPEC) Pub Date : 2015-12-03 DOI: 10.1109/UPEC.2015.7339967
Pasqualino Lico, M. Marinelli, K. Knezović, S. Grillo
{"title":"Phase balancing by means of electric vehicles single-phase connection shifting in a low voltage Danish grid","authors":"Pasqualino Lico, M. Marinelli, K. Knezović, S. Grillo","doi":"10.1109/UPEC.2015.7339967","DOIUrl":"https://doi.org/10.1109/UPEC.2015.7339967","url":null,"abstract":"In Denmark, household consumers are supplied with three phase with neutral cable. In addition, the distribution service operator cannot decide to which phase electrical appliance are connected. The technician who realizes the installation connects the loads according to his technical expertise. This may results in heavy imbalances. This paper uses a real Danish distribution system with household consumers, photovoltaic in- stallation and electrical vehicles (EV). In this paper the possibility to use EVs' charging spots in order to reduce grid's imbalances will be investigated. Usually, charging stations are equipped with single-phase converters. According to the designed control strategy, the charging spot can select the phase to be used for the charge. The selection is done according to a phase voltage measurement.","PeriodicalId":446482,"journal":{"name":"2015 50th International Universities Power Engineering Conference (UPEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115237474","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}
引用次数: 16
Effect of dry band location on electric field distribution along a polymeric insulator under contaminated conditions 污染条件下干带位置对聚合物绝缘子电场分布的影响
2015 50th International Universities Power Engineering Conference (UPEC) Pub Date : 2015-12-03 DOI: 10.1109/UPEC.2015.7339957
Arshad, A. Nekahi, S. McMeekin, M. Farzaneh
{"title":"Effect of dry band location on electric field distribution along a polymeric insulator under contaminated conditions","authors":"Arshad, A. Nekahi, S. McMeekin, M. Farzaneh","doi":"10.1109/UPEC.2015.7339957","DOIUrl":"https://doi.org/10.1109/UPEC.2015.7339957","url":null,"abstract":"To study the effect of dry band location on electric field distribution of polymeric insulators, simulations were carried out using Comsol Multiphysics. The effect of dry band along a polymeric insulator at shed, core and junction of core and shed regions on the electric field distribution was investigated. Pollution was modelled as a 2-mm uniform conductive water layer on the insulator surface. Conductivity of pollution layer was set at 500μS/cm to simulate medium pollution conditions. Simulation was carried out by considering a 2-cm dry band at the shed, core and junction of shed and core regions respectively. The highest electric field strength was observed when the dry band was considered at the junction of shed and core region while the electric field strength was minimum along the dry band at the shed regions. The result of this study will help scientists and engineers to improve the design of weather sheds for high voltage insulators so that the possibility of dry band formation at the junction of shed and core is minimized.","PeriodicalId":446482,"journal":{"name":"2015 50th International Universities Power Engineering Conference (UPEC)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130235658","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}
引用次数: 16
A bidirectional power flow controller for EVs to support the grid 一种支持电网的电动汽车双向潮流控制器
2015 50th International Universities Power Engineering Conference (UPEC) Pub Date : 2015-12-03 DOI: 10.1109/UPEC.2015.7339939
A. Sgarbossa, R. Turri, G. Putrus, G. Lacey
{"title":"A bidirectional power flow controller for EVs to support the grid","authors":"A. Sgarbossa, R. Turri, G. Putrus, G. Lacey","doi":"10.1109/UPEC.2015.7339939","DOIUrl":"https://doi.org/10.1109/UPEC.2015.7339939","url":null,"abstract":"The spreading of electrical vehicles leads to a positive impact on the mobility field from the ecological, economical and efficiency point of view. Unfortunately this diffusion is also potentially capable of negative reverberations on distribution and transmission networks, since EVs can be considered as a new load category. Rather than preventing this virtually negative situation, it is possible for the grid to take advantage of the capabilities of EVs' batteries to implement ancillary services: for this reason the proposed vehicle's battery charger is designed to operate with bidirectional power flow (implementing V2G - Vehicle to Grid- and G2V -Grid to Vehicle- modes). The target is pursued through grid manager request towards grid connected EVs. If the power flow's direction and amount is enabled by the EV controller (depending on the SOC of the battery), the control system acquires the reference signal, which is the network sinusoidal voltage wave. This synchronization between the device and the grid is followed by the battery charger's modulation of a voltage sine wave with a certain amplitude and phase displacement with respect to the reference signal, in order to reach the desired working point which provides ancillary services to the grid. This paper analyses both the control strategy and the profiles of the transient states that take place when the switch between working points is request.","PeriodicalId":446482,"journal":{"name":"2015 50th International Universities Power Engineering Conference (UPEC)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128884792","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}
引用次数: 1
Optimal STATCOM sizing and dynamic performance in industrial applications 最佳STATCOM尺寸和动态性能在工业应用
2015 50th International Universities Power Engineering Conference (UPEC) Pub Date : 2015-12-03 DOI: 10.1109/UPEC.2015.7339895
Ramana A. Budha, F. Hashiesh
{"title":"Optimal STATCOM sizing and dynamic performance in industrial applications","authors":"Ramana A. Budha, F. Hashiesh","doi":"10.1109/UPEC.2015.7339895","DOIUrl":"https://doi.org/10.1109/UPEC.2015.7339895","url":null,"abstract":"This paper engaged with the 1) optimal STATCOM sizing to achieve required power factor as per the grid code requirement at the Point of Common Coupling (PCC) under various loading and operating conditions and 2) STATCOM dynamic performance during large motor starting and under fault conditions by monitoring the bus voltage recovery, STATCOM reactive power supply, synchronous machine rotor angle using DIgSILENT software in the industrial applications. This paper demonstrates the DIgSILENT model and full analysis of the results will be highlighted.","PeriodicalId":446482,"journal":{"name":"2015 50th International Universities Power Engineering Conference (UPEC)","volume":"219 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115244386","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}
引用次数: 0
A survey of technical challenges in wireless machine-to-machine communication for smart grids 智能电网中无线机器对机器通信的技术挑战综述
2015 50th International Universities Power Engineering Conference (UPEC) Pub Date : 2015-12-03 DOI: 10.1109/UPEC.2015.7339879
S. Subhani, H. Shi, J. Cobben
{"title":"A survey of technical challenges in wireless machine-to-machine communication for smart grids","authors":"S. Subhani, H. Shi, J. Cobben","doi":"10.1109/UPEC.2015.7339879","DOIUrl":"https://doi.org/10.1109/UPEC.2015.7339879","url":null,"abstract":"In this paper, discernible challenges of autonomous grid operation via wireless machine-to-machine communication are surveyed. The objective was to gain insight into the feasibility of a self-regulating, autonomous smart grid which depends largely on wireless machine-to-machine communication technology. This technology is envisioned to coordinate numerous distributed energy resources and other cyber physical components for the substance of stable and secure grid operation. This survey showed that the technology readiness level of wireless telecommunication is currently insufficient to uphold autonomous control of power systems. Moreover, standard frameworks must be developed in order to advance the practicality of machine-to-machine communication technology regarding secure and autonomous grid operation.","PeriodicalId":446482,"journal":{"name":"2015 50th International Universities Power Engineering Conference (UPEC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127929958","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}
引用次数: 7
Optimized carrier-based pulse width modulation technique with double switching frequencies for three-phase inverters 优化了基于载波的双开关频率脉宽调制技术
2015 50th International Universities Power Engineering Conference (UPEC) Pub Date : 2015-12-03 DOI: 10.1109/UPEC.2015.7339952
Hussain M. Bassi
{"title":"Optimized carrier-based pulse width modulation technique with double switching frequencies for three-phase inverters","authors":"Hussain M. Bassi","doi":"10.1109/UPEC.2015.7339952","DOIUrl":"https://doi.org/10.1109/UPEC.2015.7339952","url":null,"abstract":"Power demand is increase where this growth mandate the use of power electronics technology. However, power electronics devices inject harmonics into the power grid where it degrades the power quality. Besides, the switching associated with the power electronics devices increase the losses in the transmitted power. This paper presents an optimization of a novel carrier-based power width modulation technique for voltage source inverter to reduce the THD and increase the fundamental component of inverter output. The carrier has a shape of double-frequency inverse sinusoidal pulse width modulation. The modulation of the inverter modulate with low frequency when the reference sinusoidal wave is at the peak because the information rate change is low. The implementation of the conventional SPWM does not utilize the inverter DC input where the proposed PWM method improve this utilization by increase the ON state of the inverter switching devices. The proposed method was verified by simulation using PSCAD/EMTDC. It was compared with commonly used modulation techniques such as SPWM. The switching frequencies then optimized to operate at lower THD and switching and higher THD.","PeriodicalId":446482,"journal":{"name":"2015 50th International Universities Power Engineering Conference (UPEC)","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127649770","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}
引用次数: 2
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