{"title":"Induction motor stator windings asymmetry influence on frequency converter autonomous voltage inverter","authors":"M. Zagirnyak, A. Kalinov, A. Kostenko","doi":"10.1109/IEPS.2016.7521849","DOIUrl":"https://doi.org/10.1109/IEPS.2016.7521849","url":null,"abstract":"One of the reasons for deterioration of the efficiency of operation of a variable-frequency electric drive (VFED) with scalar control consists in occurrence of asymmetry of induction motor (IM) parameters. Apart from appearance of variable components of consumed power and electromagnetic torque, such asymmetry causes deterioration of operating mode of an autonomous voltage inverter (AVI). Assessment of IM stator windings asymmetry influence on heating losses revealed non-uniform current loading and, in its turn, uneven heating of transistors and bypass diodes of the AVI. The work included verification of VFED operation at different levels of stator windings asymmetry and use of a system of compensation for influence of IM asymmetry on the basis of the cross-vector theory of instantaneous power. Obtained results proved that the use of this compensation system causes decrease of unevenness of distribution of heating loss on power keys of the AVI.","PeriodicalId":428319,"journal":{"name":"2016 2nd International Conference on Intelligent Energy and Power Systems (IEPS)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124861276","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":"Distributed generation optimal placement. Climatic pattern consideration","authors":"I. Goncharenko","doi":"10.1109/IEPS.2016.7521875","DOIUrl":"https://doi.org/10.1109/IEPS.2016.7521875","url":null,"abstract":"Constant growth of distributed generation (DG) in power systems has not only positive changes. Incorrect placement of DG can worsen steady-state parameters of a power grid, for example, power losses. The specific method of optimal DG placement and capacity, that has been developed previously, was improved. Now method determines the effect of installed DG on the power grid operation considering type and capacity of DG units, climatic pattern of installation region and different power grid steady-states. Method improvements have been tested on IEEE 14-bus test system using Monte-Carlo method. The results of simulation tests show viability of the updated method.","PeriodicalId":428319,"journal":{"name":"2016 2nd International Conference on Intelligent Energy and Power Systems (IEPS)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116146954","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":"Features of the energy interchange between capacitors in the circuit using unidirectional commutator or bidirectional one","authors":"N. Suprunovska, A. A. Shcherba","doi":"10.1109/IEPS.2016.7521843","DOIUrl":"https://doi.org/10.1109/IEPS.2016.7521843","url":null,"abstract":"Processes of electric energy interchange between two capacitors charged to different voltage in a circuit with inductance are studied. It is found that the energy loss in such circuit and a coefficient of energy transfer from one capacitor to another one connected by bidirectional commutator (conducting a current in both directions) are determined only a difference of initial voltages on capacitors and a relationship of their capacitances, and do not depend neither on a ohmic resistance, nor on inductance of circuit. In this case the energy interchange between capacitors proceeds until transient damping. At the same time it is shown that if capacitors are connected by the unidirectional commutator (conducting a current in one direction) and energy interchange between them is an oscillatory process, then the energy loss will decrease, and the coefficient of energy transfer will increase at decrease of a difference of initial voltage of capacitors and with increase of inductance in the circuit. For such energy interchange the dependences of energy loss and coefficient of energy transfer between capacitors on relationship of their capacitances are determined. It is shown that the maximal energy loss takes place at equal capacitances of connected capacitors for any values of inductance in circuit.","PeriodicalId":428319,"journal":{"name":"2016 2nd International Conference on Intelligent Energy and Power Systems (IEPS)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116460994","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}
V. Mykhailenko, S. Karelin, J. I. Kunyk, R. V. Dryomov
{"title":"The analysis of electromagnetic processes in semiconductor converter with nine-zone regulation of initial voltage","authors":"V. Mykhailenko, S. Karelin, J. I. Kunyk, R. V. Dryomov","doi":"10.1109/IEPS.2016.7521888","DOIUrl":"https://doi.org/10.1109/IEPS.2016.7521888","url":null,"abstract":"The analysis of electromagnetic processes in electric circuit with the semiconductor converter is presented in the article. The mathematical model for the analysis of electromagnetic processes in the semiconductor converter with power width regulation of the output voltage is created. The problem of using the method multiple parametric modulation function is solved in the work.","PeriodicalId":428319,"journal":{"name":"2016 2nd International Conference on Intelligent Energy and Power Systems (IEPS)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131599886","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":"Test devices for experimental researches of low power electric drives on the basis of permanent magnet brushless machines","authors":"K. Akinin, V. Kireyev","doi":"10.1109/IEPS.2016.7521876","DOIUrl":"https://doi.org/10.1109/IEPS.2016.7521876","url":null,"abstract":"This paper deals with an overview of the designs and load control systems of test devices for experimental researches of low power electric drives based on permanent magnet brushless machines. The designs of test devices used for testing standard motors and stationary systems with minimal mechanical losses are considered. In order to simulate mechanical loading of a mechanism with mechanical characteristics of radial type and with the properties of torque constancy, the systems of electric generator load control are proposed. Applying of a special generator control cascade scheme provides the constancy of load torque in the change of angular speed in range from zero to the maximum value. The use of proposed test devices allows to increase the efficiency of experimental researches of executive electric motors.","PeriodicalId":428319,"journal":{"name":"2016 2nd International Conference on Intelligent Energy and Power Systems (IEPS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129253570","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}
M. Artemenko, L. M. Batrak, S. Polishchuk, V. Mykhalskyi, Ivan Shapoval
{"title":"Reactive compensation of non-active power in hybrid shunt filter of three-phase four-wire system at random load","authors":"M. Artemenko, L. M. Batrak, S. Polishchuk, V. Mykhalskyi, Ivan Shapoval","doi":"10.1109/IEPS.2016.7521863","DOIUrl":"https://doi.org/10.1109/IEPS.2016.7521863","url":null,"abstract":"New method for determination of parameters of the reactive compensator elements with a delta connection has been proposed that allows to calculate them regardless of the calculation of compensator elements with a star connection. The method is intended for calculation of the reactive compensator parameters of the hybrid shunt filter for discrete linear model of load that randomly varies. As an example of random switching of single-phase load the use of the results to reduce the installed power of the active part of the shunt hybrid filter of the three-phase four-wire power system has been demonstrated.","PeriodicalId":428319,"journal":{"name":"2016 2nd International Conference on Intelligent Energy and Power Systems (IEPS)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125388941","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}
V. Yuhimenko, G. Geula, G. Agranovich, M. Averbukh, A. Kuperman
{"title":"Active voltage sensorless supercapacitor bank balancer with peak current protection","authors":"V. Yuhimenko, G. Geula, G. Agranovich, M. Averbukh, A. Kuperman","doi":"10.1109/IEPS.2016.7521855","DOIUrl":"https://doi.org/10.1109/IEPS.2016.7521855","url":null,"abstract":"In this paper, average modeling of a dual-supercapacitor bank, actively balanced by a bidirectional buck-boost converter is presented. In such a system, natural balancing is achieved when the converter is operated in open loop with 50% duty cycle, eliminating the need for measuring the voltage of each storage device. Nevertheless, excessive currents arise even for slight voltage misbalance because of the highly underdamped nature of the system. In order to remedy this drawback, bidirectional pulse-by-pulse inductor current limitation is introduced, which is equivalent to adding a peak-current-mode-like control loop to the system. Since the duty cycle never exceeds 50%, compensation ramp is not required to maintain stability. On the other hand, while the uncontrolled system dynamics is linear, introducing the current limit mechanism turns the closed loop dynamics into a nonlinear one, burdening the analysis task and thus calling for suitable average model to perform fast simulations for system analysis. Dynamical equations of the system are developed in order to derive the switching-cycle-averaged model. Simulations support the presented findings.","PeriodicalId":428319,"journal":{"name":"2016 2nd International Conference on Intelligent Energy and Power Systems (IEPS)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128875813","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}
S. Kolesnik, M. Sitbon, G. Agranovich, A. Kuperman, T. Suntio
{"title":"Comparison of photovoltaic and wind generators as dynamic input sources to power processing interfaces","authors":"S. Kolesnik, M. Sitbon, G. Agranovich, A. Kuperman, T. Suntio","doi":"10.1109/IEPS.2016.7521859","DOIUrl":"https://doi.org/10.1109/IEPS.2016.7521859","url":null,"abstract":"The paper reveals that while the equivalent circuit, representing the load side reflected low-frequency dynamics of a wind turbine generator, is similar to the electrical equivalent circuit of a photovoltaic generator, their dynamic resistances possess different behavior. While the incremental conductance of a photovoltaic generator does not change sign with terminal voltage variations, zero-crossing dynamic conductance characterizes wind turbine generator. The findings points out the complications arising during interfacing a wind turbine generator by different power processing interfaces.","PeriodicalId":428319,"journal":{"name":"2016 2nd International Conference on Intelligent Energy and Power Systems (IEPS)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133536999","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":"Analyse of steady-state process in circuits with incommensurable frequencies of voltage sources","authors":"I. Korotyeyev, M. Klytta","doi":"10.1109/IEPS.2016.7521846","DOIUrl":"https://doi.org/10.1109/IEPS.2016.7521846","url":null,"abstract":"The paper presents the study of a process's calculation in circuits with incommensurable frequencies. In such circuits the analysis of processes is realized by the use of an additional independent variable. Definitions of RMS currents, voltages and active power are introduced on the base of double integrals. Calculations of an active power in circuits with two independent voltage sources and a single-phase half-bridge inverter are presented.","PeriodicalId":428319,"journal":{"name":"2016 2nd International Conference on Intelligent Energy and Power Systems (IEPS)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130360518","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":"Context-aware framework for energy management system","authors":"A. Kyselova, I. V. Verbitskyi, G. Kyselov","doi":"10.1109/IEPS.2016.7521890","DOIUrl":"https://doi.org/10.1109/IEPS.2016.7521890","url":null,"abstract":"In this work we present a context-aware framework for energy management system (CAEMS). The CAEMS is a context awareness framework that aims to provide a comprehensive solution to reason about the context from the level of sensor data to the high-level situation awareness (actuator or devices). The paper describes these challenges and presents data management solutions as a module of context data analysis for the energy (Microgrid) control system. These solutions include sensor data acquisition and time series forecasting, ontology model and context prediction model for analytical query processing past and future context data.","PeriodicalId":428319,"journal":{"name":"2016 2nd International Conference on Intelligent Energy and Power Systems (IEPS)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115887415","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}