2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)最新文献

{"title":"Nine-levels cascaded H-bridge converter prototype for FACTS applications","authors":"I. Sanz, M. Moranchel, E. Bueno, F. Rodríguez","doi":"10.1109/PEDG.2016.7527058","DOIUrl":"https://doi.org/10.1109/PEDG.2016.7527058","url":null,"abstract":"This paper proposes a nine-levels cascaded H-bridge (CHB) converter prototype for FACTS applications, in this case for a STATCOM system. In this prototype the cascaded H-bridge converter is controlled through a hardware platform that executes the control algorithms. This hardware control system is based on dSPACE platform and MicroZed board.","PeriodicalId":156411,"journal":{"name":"2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117212148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on the construction method of Z-source DC-DC converters","authors":"D. Qiu, Bo Zhang, Liqiang Yang, Guidong Zhang, Fan Xie","doi":"10.1109/PEDG.2016.7527069","DOIUrl":"https://doi.org/10.1109/PEDG.2016.7527069","url":null,"abstract":"DC-DC converters with impedance network usually have the feature of high step-up gain, which is suitable to be applied in the distributed generation systems. As more and more topologies have been proposed, it is significant to summarize the construction method of Z-source DC-DC converters and compare their performance. In this paper, three typical connection ways between the power source and the impedance network have been concluded. Then different kinds of Z-source DC-DC converter can be obtained by selecting the impedance network type, connection way to the power source and the output current style. Finally, the feasibility of the proposed methodology has been verified by a series of Z-source DC-DC converters.","PeriodicalId":156411,"journal":{"name":"2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129882649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Model predictive current controller using Kalman filter for fault-tolerant five-phase wind energy conversion systems","authors":"J. Rodas, H. Guzman, R. Gregor, F. Barrero","doi":"10.1109/PEDG.2016.7526999","DOIUrl":"https://doi.org/10.1109/PEDG.2016.7526999","url":null,"abstract":"Fault-tolerance is one of the most sought-to capabilities of wind energy conversion systems (WECS). The ability to maintain operation even after an open-phase fault, allows for the system operators to maintain energy production, providing tangible economic benefits. Recently, the use of multiphase drives for WECS have been proposed due to their inherent fault-tolerance capability and the capacity to manage higher power ratings. As a result, different fault-tolerant control schemes have been developed in the literature considering linear, non-linear and predictive structures and achieving different post-fault control criteria (i.e. reduce copper losses or ensure maximum torque capability). Multiphase drives control require the measurement of physical variables that provide a sufficient quantity and quality of information on the system state in order to ensure the required level of performance. However, the measurement of some physical quantities may not be possible or desired, mainly due to cost constraints and/or the decrease in system reliability. In this context, the Kalman filter (KF) estimators have been said to be the best choice for processing noisy discrete measurements and obtaining high-accuracy estimates of dynamic system states. In this paper, a fault-tolerant model-based predictive current control using a KF is proposed. In particular, the KF is used to estimate the rotor currents, improving the quality of the prediction model and thus the controller performance. Furthermore, the KF provides better transient response than traditional estimation methods (i.e. Luenberger observer) due to the dynamic readjustment of the filter parameters. To demonstrate the performance of the proposed algorithm, a simulation study of a WECS based on a five-phase induction drive modeled in MATLAB/Simulink with an open-phase fault in phase “a”, is conducted implementing the proposed open-phase fault-tolerant control scheme considering the minimum copper loss and the minimum derating criteria, for post-fault operation.","PeriodicalId":156411,"journal":{"name":"2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"242 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122719559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reduced-order harmonic modeling and analysis of droop-controlled distributed generation networks","authors":"P. Hart, R. Lasseter, T. Jahns","doi":"10.1109/PEDG.2016.7527023","DOIUrl":"https://doi.org/10.1109/PEDG.2016.7527023","url":null,"abstract":"This work describes the development of a reduced-order nonlinear dynamic phasor modeling tool for distribution networks containing a large number of P-f and Q-v droop-controlled inverters. Attention is focused on constructing reduced-order models that accurately predict the nonlinear behavior of coherent clusters of droop-controlled inverters in response to a large disturbance, such as an asymmetric fault. In such a scenario, dynamic phasor models are shown to offer valuable insights into how the signal conditioning associated with local power measurement can have a significant effect on the large-signal stability of a droop-controlled inverter or inverter cluster. An algorithm conventionally used to identify coherent groups of synchronous generators is adopted for the investigation of coherency between large numbers of droop-controlled inverters within a distribution network. The coherency results help guide the aggregation of droop-controlled inverters and enable nonlinear reduced-order dynamic phasor modeling. For large disturbances, a reduced-order dynamic phasor simulation of a 50-inverter system is validated against full-order simulation results obtained using an OPAL-RT power system simulator.","PeriodicalId":156411,"journal":{"name":"2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130911864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advanced derating strategy for extended lifetime of power electronics in wind power applications","authors":"I. Vernica, Ke Ma, F. Blaabjerg","doi":"10.1109/PEDG.2016.7527065","DOIUrl":"https://doi.org/10.1109/PEDG.2016.7527065","url":null,"abstract":"It is well known that one of the main causes of failure in wind power applications is due to the power converter and its semiconductor devices. Consequently, the main objective of this paper consists of analyzing the impact of converter derating on the lifetime of the power devices by means of advanced reliability models and tools. The wind power system together with the thermal cycling in the power semiconductor devices has been modeled and the dynamic behavior of the system has been analyzed under certain mission profiles. Based on the thermal loading of the devices, the lifetime estimation is carried out, and by computing the total accumulated damage, the optimal point in which the converter derating should occur can be determined. Finally, by using the reliability tools, the converter derating strategy is modeled and analyzed and the obtained results are compared with the normal operation case, by means of quantified lifetime estimation.","PeriodicalId":156411,"journal":{"name":"2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"467 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133212535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fault diagnosis of modular multilevel converters based on extended state observer","authors":"Xing Hu, Jianzhong Zhang, Shuai Xu, Yongjiang Jiang","doi":"10.1109/PEDG.2016.7527031","DOIUrl":"https://doi.org/10.1109/PEDG.2016.7527031","url":null,"abstract":"A fault diagnosis strategy for open-circuit failure of semiconductor switching device in modular multilevel converters is proposed in this paper. Fault detection and location are both included in this strategy. An extended state observer based on arm current equation is put forward and designed. The inputs of the observer are the arm current, ac voltage, and the dc link voltage. The observer is used to track the arm current and output the observed value of the extended state. The theoretical calculated value of the extended state can be acquired by the sub-module operation states and the capacitor voltages. The deviation between the observed and calculated value can be used to detect and locate the fault switching device. The effectiveness of the proposed strategy is verified in Matlab/Simulink.","PeriodicalId":156411,"journal":{"name":"2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117293843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"AC voltage sensors-less control strategies for dual-mode micro-grid interfacing converters","authors":"Ruiqi Wang, Shumin Sun, Chao-Chao Li, K. Han, D. Wang, Jinwei He, J. Ren","doi":"10.1109/PEDG.2016.7527010","DOIUrl":"https://doi.org/10.1109/PEDG.2016.7527010","url":null,"abstract":"This paper proposes an alternative control method to interconnect DG interfacing converter to grid-tied and islanding microgrids, without using any AC voltage sensor. By properly using the flexible control of virtual harmonic impedance and droop control, the line current quality and power control accuracy in grid-tied mode are improved. In addition, the supply voltage quality problem in islanding mode can be solved in a similar manner, with slight modification of the virtual impedance. Verification results are provided to prove the correctness of the proposed method.","PeriodicalId":156411,"journal":{"name":"2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133026231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Circulating current suppressing in modular parallel photovoltaic grid-connected inverter","authors":"Peng Zhang, Guorong Zhang","doi":"10.1109/PEDG.2016.7527007","DOIUrl":"https://doi.org/10.1109/PEDG.2016.7527007","url":null,"abstract":"Modular parallel photovoltaic grid connected inverter (PV GCI) with common array bus can optimize the operation mode of the modules to improve the power generation and the reliability of the system. However, the shunt of DC side serves a channel for zero sequence current, that will cause zero sequence circulating current. In this paper, the model of zero sequence circulating current in abc coordinate and dq coordinate is established seperately. It is concluded that the rate of zero sequence circulating current is mainly depended on the difference between the zero sequence voltage of the two modules. The influence of carrier asynchronization and PWM modulation method on zero sequence circulating current is also analysised. Furthermore, this study proposes a carrier synchronization and module master-slave control method to suppress the circulating current without combining a zero sequence current controller. Test results on PV GCI with two 10kW modules are presented to validate the performances of the proposed method.","PeriodicalId":156411,"journal":{"name":"2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"198 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114874588","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Implementation and performance of three-way isolated DC/DC converter using SiC-MOSFETs for power flow control","authors":"Y. Kado, Ryosuke Kasashima, Naoki Iwama, K. Wada","doi":"10.1109/PEDG.2016.7527102","DOIUrl":"https://doi.org/10.1109/PEDG.2016.7527102","url":null,"abstract":"We propose a Y-configuration power router as a unit cell to easily construct a power delivery system that can meet many types of user requirements. The Y-configuration power router controls the direction and magnitude of power flow among three ports. Equations for the transmission power in each port were developed to control the power flow based on phase shift modulation. We made a prototype three-way isolated DC/DC converter consisting of SiC-MOSFETs that is the core unit of the Y-configuration power router and tested power flow control operation under open loop control. The experimental results revealed that our methodology based on the governing equation was appropriate for the power flow control of the three-way DC/DC converter.","PeriodicalId":156411,"journal":{"name":"2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122143085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coexistence of fast-scale and slow-scale instabilities in DC cascaded converters system with multi-load converters","authors":"Fan Xie, Bo Zhang, D. Qiu, Yanwei Jiang","doi":"10.1109/PEDG.2016.7527067","DOIUrl":"https://doi.org/10.1109/PEDG.2016.7527067","url":null,"abstract":"DC cascaded converters system with multi-load converters is the most dominant connection among microgrids, renewable energy systems and DC distribution power systems. In this paper, coexistence of fast-scale and slow-scale instabilities is analyzed in a DC cascade converters system which is contained of one source converter with three load converters. To simplicity, all of the load converters are considered as constant power loads and the discrete mapping of the DC cascaded converters system is established. Then, the bifurcation behaviors and the coexisting fast-scale and slow-scale instabilities are found. Finally, the coexisting fast-scale and slow-scale instabilities are verified by simulation and experiment analysis.","PeriodicalId":156411,"journal":{"name":"2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132098687","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}