2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)最新文献

A Single-Stage Z-source Inverter for Transformerless Grid Connection with a Proportional-Resonant Controller for DC Current Elimination 一种用于无变压器并网的单级z源逆变器，带有直流电流消除的比例谐振控制器

2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems (PEDG) Pub Date : 2020-09-28 DOI: 10.1109/PEDG48541.2020.9244418

A. Asi, B. Chong, L. Zhang, J. Nkanu

{"title":"A Single-Stage Z-source Inverter for Transformerless Grid Connection with a Proportional-Resonant Controller for DC Current Elimination","authors":"A. Asi, B. Chong, L. Zhang, J. Nkanu","doi":"10.1109/PEDG48541.2020.9244418","DOIUrl":"https://doi.org/10.1109/PEDG48541.2020.9244418","url":null,"abstract":"The ever-rising number of grid-connected inverters contributes to an increase of DC current injection into utility grid, resulting in the saturation of distribution transformers, metering errors and the corrosion of earthling conductors. A transformerless single-stage Z-source inverter uses only two switching devices in its converter circuit to generate sinusoidal voltage as that of a full-bridge inverter. However, this inverter has the problem of having a DC offset in the AC waveform due to the presence of steady-state error when the modulation index is varied. The paper proposes a Proportional-Resonant (PR) control scheme to eliminate this DC offset. By comparing Z-source inverter output voltage with the sinusoidal reference voltage obtained from the sinusoidal control signal, an error signal is obtained which is fed into the PR controller. An infinite gain at the fundamental frequency is introduced by the PR controller, thus achieving zero steady-state error resulting in the elimination of DC current injection into the utility grid. This method does not depend on high-precision current measurement or the use of coupled inductors. Also, this method can be used to improve power quality by providing reactive power compensation to the load at the point of common coupling. Simulation results are presented to confirm that this simple, cost-effective method can be used to eliminate DC current injection for different values of modulation index without compromising the dynamic response of the current feedback loop","PeriodicalId":249484,"journal":{"name":"2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121049408","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

Tow-step inertia provision with consideration of load type in an islanded wind turbine with grid-supporting voltage control 并网电压控制孤岛式风力发电机组考虑负荷类型的两步惯性供给

2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems (PEDG) Pub Date : 2020-09-28 DOI: 10.1109/PEDG48541.2020.9244400

Nastaran Fazli, Sidney Gierschner, H. Eckel

{"title":"Tow-step inertia provision with consideration of load type in an islanded wind turbine with grid-supporting voltage control","authors":"Nastaran Fazli, Sidney Gierschner, H. Eckel","doi":"10.1109/PEDG48541.2020.9244400","DOIUrl":"https://doi.org/10.1109/PEDG48541.2020.9244400","url":null,"abstract":"The modern power system encounters difficulties in increasing the share of renewables as they are not participating in the total power system inertia, which endangers the strength of the power system against faults. As conventional generation with inherent inertia provision ability are being replaced by converter-based generation, they have to perform this role. Therefore, it is important that the control method of wind turbines seamlessly estimate frequency variation and be designed to make the inertia power command to smooth it. Hence, in this paper, inertia provision in an islanding scenario in a power system by a wind turbine will be studied. The inertia is provided via rotating masses or auxiliary power source, or together in a two-step inertia power injection. The power and energy limitations will also be considered in the comparison of inertia provision in different scenarios. The time is important for the injected inertia power to catch the frequency from falling into a very low nadir and make a different stability border for the share of renewables. In this study, the effect of converter-fed loads will also be investigated.","PeriodicalId":249484,"journal":{"name":"2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125119965","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

Design and Implementation of a Voltage Harmonic Elimination Control Method for the Single-Phase Inverter 单相逆变器电压谐波消除控制方法的设计与实现

2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems (PEDG) Pub Date : 2020-09-28 DOI: 10.1109/PEDG48541.2020.9244362

B. Proca, M. Comanescu

{"title":"Design and Implementation of a Voltage Harmonic Elimination Control Method for the Single-Phase Inverter","authors":"B. Proca, M. Comanescu","doi":"10.1109/PEDG48541.2020.9244362","DOIUrl":"https://doi.org/10.1109/PEDG48541.2020.9244362","url":null,"abstract":"Single-phase voltage-source converters are widely used in power conversion systems like grid-interfaced photovoltaic arrays. This paper presents a control method for the single-phase inverter that is looking to reduce the harmonic content of the output voltage, especially for the situation when the inverter feeds a crest-factor load. In this case, the currents are non-sinusoidal and relatively distorted; as a result, the THD is higher than the specification allows. The method proposed uses a voltage controller followed by a current controller - both are implemented in the stationary reference frame. The voltage controller uses a harmonic elimination method based on modulation-demodulation. This approach regulates the fundamental of the voltage and is also used to attempt the elimination of some higher order harmonics. In the simulations and experiments shown in the paper, the regulation and harmonic elimination scheme is implemented for the fundamental and for the 3rd, 5th and 7th harmonics of the voltage. The scheme can be expanded further to eliminate the harmonics of even higher order. It is shown that the control method proposed significantly reduces the Total Harmonic Distortion (THD) of the output voltage, from 5.8% (at full load, uncompensated) to 1.6% (at full load, with compensation). The control method proposed is validated with simulations and experimental tests.","PeriodicalId":249484,"journal":{"name":"2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114946356","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

Sensor Fault Detection for Line Regulating Converters supplying Constant Power Loads in DC Microgrids 直流微电网恒载变流器传感器故障检测

2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems (PEDG) Pub Date : 2020-09-28 DOI: 10.1109/PEDG48541.2020.9244467

Kasper Jessen, M. Soltani, A. Hajizadeh

引用次数: 3

Extended Model of Chopper Cells for Open Circuit Fault Detection in Modular Multilevel Cascade Converters using Sliding Mode Observers 滑模观测器用于模块级联变换器开路故障检测的斩波单元扩展模型

2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems (PEDG) Pub Date : 2020-09-28 DOI: 10.1109/PEDG48541.2020.9244420

Thomas Kreppel, F. Rojas, C. Hackl, Oliver Kalmbach, M. Díaz, G. Gatica

引用次数: 1

A Generic Switching State-Space Model for Modular Multilevel Cascade Converters 模块化多电平串级变换器的通用开关状态空间模型

2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems (PEDG) Pub Date : 2020-09-28 DOI: 10.1109/PEDG48541.2020.9244315

Oliver Kalmbach, C. Hackl, F. Rojas

引用次数: 3

A Status Monitoring Method for Multi-parallel Choppers in Wind Turbine Converters 风力发电机组变流器多并联旋翼状态监测方法

2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems (PEDG) Pub Date : 2020-09-28 DOI: 10.1109/PEDG48541.2020.9244386

R. Wu, Masoud Parkhou

引用次数: 0

Enhancing Frequency Stability of Weak Grids with Modified Distributed Virtual Inertia Method 改进的分布式虚惯性法增强弱电网的频率稳定性

2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems (PEDG) Pub Date : 2020-09-28 DOI: 10.1109/PEDG48541.2020.9244475

Meysam Saeedian, Bahram Pournazarian, B. Eskandari, M. Shahparasti, E. Pouresmaeil

{"title":"Enhancing Frequency Stability of Weak Grids with Modified Distributed Virtual Inertia Method","authors":"Meysam Saeedian, Bahram Pournazarian, B. Eskandari, M. Shahparasti, E. Pouresmaeil","doi":"10.1109/PEDG48541.2020.9244475","DOIUrl":"https://doi.org/10.1109/PEDG48541.2020.9244475","url":null,"abstract":"In small–scale power systems, distributed virtual inertia (DVI)–based converters can effectively participate in primary frequency regulation. In this method, the synthetic inertia provision is fulfilled by discharging the preserved energy of dc–side capacitors employed in grid–interactive converters. Nevertheless, the eigenvalue analyses provided by small–signal state–space model of the converter reveal that the DVI function induces instability to the converter operating in weak grid connection. To address this issue aimed at improving grid frequency stability during frequency events, a new compensator is presented in this work. The compensator is designed so as eliminates the negative effect of DVI regulator on system stability. The effectiveness of proposed approach is illustrated by the time–domain simulations in MATLAB. The results show that the frequency rate of change following a frequency perturbation is enhanced by 40.38% compared with the scenario in which the synthetic inertia functionality is nullified.","PeriodicalId":249484,"journal":{"name":"2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128073979","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

Topology and Voltage Balance of Series-Connected T-type Inverter for Medium-Voltage Drive Applications 中压驱动中串联t型逆变器的拓扑结构和电压平衡

2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems (PEDG) Pub Date : 2020-09-28 DOI: 10.1109/PEDG48541.2020.9244333

M. Aly, S. Kouro, T. Meynard

引用次数: 0

Generalized Behavioral Models of Three-Phase Converters and Electric Machines for System-Level Study and Stability Assessment 用于系统级研究和稳定性评估的三相变流器和电机的广义行为模型

2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems (PEDG) Pub Date : 2020-09-28 DOI: 10.1109/PEDG48541.2020.9244432

I. Cvetkovic, D. Boroyevich, R. Burgos, Z. Liu

引用次数: 1