Vikram Roy Chowdhury, S. Mukherjee, P. Shamsi, M. Ferdowsi
{"title":"State Feedback Control to Damp Output LC Filter Resonance for Field Oriented Control of VSI Fed Induction Motor Drives","authors":"Vikram Roy Chowdhury, S. Mukherjee, P. Shamsi, M. Ferdowsi","doi":"10.1109/GREENTECH.2017.60","DOIUrl":"https://doi.org/10.1109/GREENTECH.2017.60","url":null,"abstract":"To achieve longer life for ac machine drives it is desirable to supply them with pure sinusoidal voltages. This reduces the stress on the windings mechanical structure. This can be accomplished by connecting an additional L-C filter at the terminals of the machine. However such filter will induce resonance effect at the motor terminals due to sidebands of switching frequency in the voltage spectrum. A series resistance to damp out the resonance oscillation can be a solution to this problem. But such a solution is lossy and drastically reduces the overall drive efficiency. In this paper an active damping based on state feedback control technique is employed to damp out the resonance oscillation at the motor terminals. The values of L-C are chosen such that it does not affect the dynamic response nor the vector control loop gains. The proposed technique is verified via simulation and the results are presented.","PeriodicalId":104496,"journal":{"name":"2017 Ninth Annual IEEE Green Technologies Conference (GreenTech)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124920861","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":"Flywheel Energy Storage - Dynamic Modeling","authors":"E. Muljadi, V. Gevorgian","doi":"10.1109/GREENTECH.2017.52","DOIUrl":"https://doi.org/10.1109/GREENTECH.2017.52","url":null,"abstract":"A flywheel energy storage systems (FESS) is suitable for high-power, low-energy content to deliver or absorb power in surges. This type of application is very suitable for frequency regulation in an electric grid. In addition, a modern FESS is built as a high-efficiency, high-speed motor/generator drive system that employs modern power electronics, therefore, the power quality of the grid-connected output is excellent. In addition, a FESS is very valuable to delivering ancillary services to the grid, and it can contribute reactive power compensation. Thus, a FESS can maintain high reliability in power systems by providing ride-through capability to the power system area while the rest of the generating fleet, which has a slower response in the power system, performs primary and secondary frequency response to the grid. A FESS has several advantages compared to a chemical-based energy storage (CBES) system, namely: it has high energy density and durability, and it can be cycled frequently without impacting performance. The response of FESS is faster than that of a CBES. Also, unlike some CBES, FESS has the same performance regardless of the number of cycles of charging/discharging performed throughout its lifetime.","PeriodicalId":104496,"journal":{"name":"2017 Ninth Annual IEEE Green Technologies Conference (GreenTech)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130215733","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":"Islanding Detection with Data Mining Methods - A Comparative Study","authors":"Hussein Al-Bataineh, R. Kavasseri","doi":"10.1109/GREENTECH.2017.21","DOIUrl":"https://doi.org/10.1109/GREENTECH.2017.21","url":null,"abstract":"There is a worldwide trend towards the integration of renewable energy in the form of distributed generation, leading to the formation of microgrids. Connection of these sources introduces new issues in the operation and management of distribution systems. An important issue is that of islanding, where the microgrid remains energized locally while isolated from the main grid. It is important to detect this islanding event quickly and accurately in order to prevent possible damage to the DG and load that remains connected to the DG side after islanding. This paper explores the problem of timely islanding detection by machine learning techniques. Several cases of islanding and non-islanding are simulated on the IEEE-13 bus distribution system. Different types of DGs are connected to the system and disturbances are introduced. We consider the use of the voltage, frequency and their rate of changes at the Point of Common Coupling (PCC) as features for event detection using classifiers. These features are extracted from the simulation results and used to train and test several types of classifiers. It is shown that the random forest classifier detects the islanding with a high level of accuracy and within a reasonable amount of time after the occurrence of the disturbance.","PeriodicalId":104496,"journal":{"name":"2017 Ninth Annual IEEE Green Technologies Conference (GreenTech)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129601239","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":"Robust Model Predictive Control of DC-DC Floating Interleaved Boost Converter under Uncertainty","authors":"H. Sartipizadeh, F. Harirchi","doi":"10.1109/GREENTECH.2017.39","DOIUrl":"https://doi.org/10.1109/GREENTECH.2017.39","url":null,"abstract":"DC-DC Floating Interleaved Boost Converter (FIBC) is a new converter commonly used for converting the low level voltage generated by a renewable energy source to a high-level voltage required for AC inverters. Although a desired voltage is expected at the output, designing a proper voltage gain for FIBC is challenging due to different types of uncertainties. For instance, the voltage generated by the renewable energy source may be affected by a variety of parameters including external load. The input voltage of the FIBC is, therefore, uncertain. In addition, the physical elements of a boost converter are also uncertain. Their value may vary from one product to another within a given range. This results in an uncertain voltage gain for a fixed switching duty cycle. In this work, the robust control of this boost converter under uncertain conditions is studied. Specifically, a Robust Model Predictive Control (RMPC) is employed for this purpose. The designed controller is able to keep the output voltage at the desired level despite the uncertainties.","PeriodicalId":104496,"journal":{"name":"2017 Ninth Annual IEEE Green Technologies Conference (GreenTech)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133927821","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}
R. Cruickshank, G. Henze, R. Balaji, B. Hodge, A. Florita
{"title":"Empirical Investigations of the Opportunity Limits of Automatic Residential Electric Load Shaping","authors":"R. Cruickshank, G. Henze, R. Balaji, B. Hodge, A. Florita","doi":"10.1109/GREENTECH.2017.17","DOIUrl":"https://doi.org/10.1109/GREENTECH.2017.17","url":null,"abstract":"Residential electric load shaping is often implemented as infrequent, utility-initiated, short-duration deferral of peak demand through direct load control. In contrast, investigated herein is the potential for frequent, transactive, intraday, consumer-configurable load shaping for storage-capable thermostatically controlled electric loads (TCLs) including refrigerators, freezers, and hot water heaters. Unique to this study are 28 months of 15-minute-interval observations of usage in 101 homes in the Pacific Northwest United States that specify start, duration, and usage patterns of approximately 25 submetered loads per home. The magnitudes of the load shift from voluntarily-participating TCL appliances are aggregated to form hourly upper and lower load-shaping limits for the coordination of electrical generation, transmission, distribution, storage, and demand. Empirical data are statistically analyzed to define metrics that help quantify load-shaping opportunities.","PeriodicalId":104496,"journal":{"name":"2017 Ninth Annual IEEE Green Technologies Conference (GreenTech)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121584326","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":"Enhancement of Voltage Profile in Unbalanced Distribution Systems with Variable Loads","authors":"Tianjian Wang, Matin Meskin, I. Grinberg","doi":"10.1109/GREENTECH.2017.50","DOIUrl":"https://doi.org/10.1109/GREENTECH.2017.50","url":null,"abstract":"Nowadays, interconnection of distributed generation (DG) units to distribution grids becomes more popular due to the many benefits they provide to grids. Their contribution in voltage regulation can improve the voltage profile in distribution networks. In addition, optimal power flow as a powerful tool in planning and load management can be applied to the distribution networks as well as at transmission level. This paper proposes a multi-objective function to address the nonlinear optimal power flow (OPF) problem in the medium voltage (MV) distribution networks. Cuckoo Search (CS) optimization approach is applied to solve the OPF problem. The proposed method is applied to IEEE 13 nodes test case with variable load. The results indicate the enhancement in voltage profile in addition to reduction of the network losses and more balanced system.","PeriodicalId":104496,"journal":{"name":"2017 Ninth Annual IEEE Green Technologies Conference (GreenTech)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133264926","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}
W. Gil-González, O. Montoya, A. Garcés, A. Escobar-Mejía
{"title":"Supervisory LMI-Based State-Feedback Control for Current Source Power Conditioning of SMES","authors":"W. Gil-González, O. Montoya, A. Garcés, A. Escobar-Mejía","doi":"10.1109/GREENTECH.2017.27","DOIUrl":"https://doi.org/10.1109/GREENTECH.2017.27","url":null,"abstract":"This paper presents a state feedback control via linear matrix inequalities (LMI) applied to the control of superconducting magnetic energy storage (SMES) systems which improve the stability of the grid. The SMES is integrated to the grid by a three-phase pulse-width-modulated current-source converter (PWM-CSC) which supports active and reactive power. This type of converter is convenient for this application due to its intrinsic current characteristics. The proposed control shows a fast dynamic response which suitable for the requirements of power system stability applications. Three type of operating states are considering namely normal, transient and restorative. Simulation results demonstrate the robust and efficient performance of the proposed control in each of these operating states.","PeriodicalId":104496,"journal":{"name":"2017 Ninth Annual IEEE Green Technologies Conference (GreenTech)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131796584","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}