{"title":"Production Function of the Energy Sector of the Republic of Moldova","authors":"M. Gritsay, M. Grodetsky, V. M. Postolatiy","doi":"10.1109/SIELMEN.2019.8905800","DOIUrl":"https://doi.org/10.1109/SIELMEN.2019.8905800","url":null,"abstract":"Based on statistical data for the period 1995–20016 on the energy sector of the Republic of Moldova, an attempt was made to construct the Cobb-Douglas production function as the dependence of the industry’s output on investment and labor. An indirect estimate of the value of the fixed assets of the energy sector at the beginning of1995 was also made.","PeriodicalId":129030,"journal":{"name":"2019 International Conference on Electromechanical and Energy Systems (SIELMEN)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126367076","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}
P. Olga, Paulet Marius, Ursan George-Andrei, U. Laurentiu, Schreiner Cristina
{"title":"Capacitive C and RC Sensorial Test Systems in LabVIEW Graphic Programming Environment with NI USB-6210 Acquisition Board","authors":"P. Olga, Paulet Marius, Ursan George-Andrei, U. Laurentiu, Schreiner Cristina","doi":"10.1109/SIELMEN.2019.8905884","DOIUrl":"https://doi.org/10.1109/SIELMEN.2019.8905884","url":null,"abstract":"Sensors are used everywhere and are indispensable in everyday live. It is necessary to know how to use a sensor, how to read and understand the signal given by a sensor. In this paper we give an example of testing the signal from a sensor using LabVIEW graphic programming environment with NI USB-6210 acquisition board.","PeriodicalId":129030,"journal":{"name":"2019 International Conference on Electromechanical and Energy Systems (SIELMEN)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129204064","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":"Solution For Water Management Using A Smart Irrigation System","authors":"Ocoleanu Constantin Florin, Nechita Adrian Mihai","doi":"10.1109/SIELMEN.2019.8905879","DOIUrl":"https://doi.org/10.1109/SIELMEN.2019.8905879","url":null,"abstract":"In this paper is proposed a solution for water management using a cost-effective smart irrigation system based on microcontroller. The system consists of a microcontroller, humidity sensors, a relays block and water pump. Depending on the needs of a specific location (soil condition – wet, dry, etc.) the system can be adjusted by modifying different parameters. There were considered 2 zones, thus being used 2 humidity sensors. When the humidity drops below a threshold value on zone 1, the humidity sensor 1 transmits the information to the microcontroller, opens the solenoid valve 1 and starts the water pump until the humidity reaches the preset value. If humidity decreases in the mean time on zone 2 the information received from the humidity sensor 2 leads the solenoid valve 2 to open and the pump starts until the desired humidity is attained while the entire system is operating. When the humidity is over the threshold humidity, the system is in “stand-by” until the sensors send new information to the microcontroller and thus the system resumes its operating cycle. Therefore, various crops can be watered. In order to implement the solution, a laboratory model was constructed. Experimental results were performed to test the performance of the irrigation system.","PeriodicalId":129030,"journal":{"name":"2019 International Conference on Electromechanical and Energy Systems (SIELMEN)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133612102","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":"Analysis of Sliding Electromagnetic Coupling Parameters in a PLC Automation System","authors":"Georgel Gabor, F. Rusu, A. Plesca, Costică Nițucă","doi":"10.1109/SIELMEN.2019.8905912","DOIUrl":"https://doi.org/10.1109/SIELMEN.2019.8905912","url":null,"abstract":"The sliding electromagnetic coupling is used in crankshaft control, dynamometer, starting and braking devices for the drive mechanisms of pumps, pumps, compressors, and fans. Electromagnetic clutch couplings solve the problem of silent starting, limiting torque, and remote control of clutch and engine disengagement, progressive variation of output shaft speed. The sliding electromagnetic coupling operation can occur at constant torque or at constant power. These regimens are obtained by the corresponding variation of the excitation current. The paper presents the operation and analysis of parameters in constant torque regime. The test bench contains three-phase electric drive, sliding electromagnetic coupler, sliding electromagnetic brake and PLC control part, frequency converter and HMI operator panel. The torque is measured using a weight sensor connected to an ARDUINO development board that supplies an analogue value in the 0-10V range for an analog input of the PLC. The results are shown on HMI device and the PLC programming is done in Siemens TIA Portal. The communication between sensor speed and PLC is realized by PROFIBUS-DP protocol.","PeriodicalId":129030,"journal":{"name":"2019 International Conference on Electromechanical and Energy Systems (SIELMEN)","volume":"520 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128139272","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":"Aspects Regarding the Alternating Current Monitoring In Electrical Equipment Testing Installations","authors":"C. Deac, M. Adam, A. Dragomir, Marian-Bogdan Micu","doi":"10.1109/SIELMEN.2019.8905874","DOIUrl":"https://doi.org/10.1109/SIELMEN.2019.8905874","url":null,"abstract":"For the testing of electrical equipment it is necessary anelectrical equipment capable of assuring permanent current and shortcircuit currents for which these equipment are tested. The paper presents an analysis of the method of measurement of alternating current in broad ranges in the case of an installation of testing electrical equipment. The paper presents an experimental investigation of monitoring and controlling of test currents from tens of amps to thousands of amps.","PeriodicalId":129030,"journal":{"name":"2019 International Conference on Electromechanical and Energy Systems (SIELMEN)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122367614","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}
G. Manolea, I. Alboteanu, A. Novac, Constantin Șulea-Iorgulescu, Sorin Stepan
{"title":"Optimizing the Structure of the Rocket Launcher Monitoring System","authors":"G. Manolea, I. Alboteanu, A. Novac, Constantin Șulea-Iorgulescu, Sorin Stepan","doi":"10.1109/SIELMEN.2019.8905892","DOIUrl":"https://doi.org/10.1109/SIELMEN.2019.8905892","url":null,"abstract":"The University of Craiova - Center for Innovation and Technology Transfer carried out systematic research on the complementary equipment for the anti-hail system. One of the research topics covered the anti-hail rocket launcher monitoring system. The paper presents one of the adaptations made this year to take into account the experience gained by those who manage the Romanian national anti-hail system.","PeriodicalId":129030,"journal":{"name":"2019 International Conference on Electromechanical and Energy Systems (SIELMEN)","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122711139","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":"Parameter Identification for Two-Windings Power Transformers","authors":"Murdid Ecaterina, Stratan Ion","doi":"10.1109/SIELMEN.2019.8905914","DOIUrl":"https://doi.org/10.1109/SIELMEN.2019.8905914","url":null,"abstract":"the novel method of parameter identification for two-windings power transformers, represented by equivalent circuit in Γ, T- and II-forms, based on synchronized phasor measurements in operation is proposed. This paper also examines the criteria that affect the results, there are made some recommendations about the implementation of the novel method.","PeriodicalId":129030,"journal":{"name":"2019 International Conference on Electromechanical and Energy Systems (SIELMEN)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122889430","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":"Neural Network Based Traffic Sign Recognition for Autonomous Driving","authors":"George-Zamfir Tiron, M. Poboroniuc","doi":"10.1109/SIELMEN.2019.8905903","DOIUrl":"https://doi.org/10.1109/SIELMEN.2019.8905903","url":null,"abstract":"Autonomous and self-driving cars represent a certitude for the near future and it is expected to be safer, time saving and to bring in environmental benefits. The road infrastrucuture still embeds traffic signs that have to be recognized with high accuracy by the sensorial system mounted on an autonomous car. This paper deals with a new Traffic Sign Recognitions system based on a pretrained neural network for general objects and retrained for a large number of traffic signs collected in real environment under different metrorological conditions. The proposed Traffic Sign Recognition system is able to classify signs in new scenarios with more than 96% accuracy.","PeriodicalId":129030,"journal":{"name":"2019 International Conference on Electromechanical and Energy Systems (SIELMEN)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116078451","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}
L. Mandache, S. Ivanov, R. Prejbeanu, M. Roman, I. Sirbu, V. Ivanov, A. Radu
{"title":"Reliable Time-Domain Analysis of Nonlinear Lumped Circuits with Topology Issues, Suitable for Transients of AC Drives","authors":"L. Mandache, S. Ivanov, R. Prejbeanu, M. Roman, I. Sirbu, V. Ivanov, A. Radu","doi":"10.1109/SIELMEN.2019.8905837","DOIUrl":"https://doi.org/10.1109/SIELMEN.2019.8905837","url":null,"abstract":"Time-domain analyses of analog circuits based on mathematical models with differential algebraic equation systems allow more flexibility of the numerical algorithms to optimize the stability, accuracy or required hardware resources compared to the SPICE-type resistive models. In order to exploit them while taking advantage of the modified nodal approaches, some restrictions related to the circuit topology occur. In this context, the paper treats briefly a novel and reliable approach based on modified nodal equations which allows treating nonlinear analog circuits of any topology, including floating capacitors and/or any type of excess element. It is suitable for time-domain analysis of transients of AC drives with power inverters, where the load is always nonlinear and it contains an inductor cutset, and the DC-link contains a floating capacitor. The method was implemented in a program which builds the mathematical model in symbolic form and solves it numerically. An example was included here to prove the effectiveness of this approach.","PeriodicalId":129030,"journal":{"name":"2019 International Conference on Electromechanical and Energy Systems (SIELMEN)","volume":"240 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127535060","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":"Optimal Voltage Control in Power Distribution Networks Using an Adaptive On-Load Tap Changer Transformers Techniques","authors":"B. Neagu, G. Grigoraș","doi":"10.1109/SIELMEN.2019.8905904","DOIUrl":"https://doi.org/10.1109/SIELMEN.2019.8905904","url":null,"abstract":"The assurance of a high quality of the voltage that supplies consumers is a first-degree demand for an optimal operation of the public electricity distribution networks (EDNs), being a permanent concern, both for Distribution Network Operators (DNOs) and the final consumers. The paper proposes a new optimal voltage control (OVC) approach in EDN using a hybrid line-drop compensation method based on adaptive On-Load Tap Changer (OLTC) Transformers techniques. The OVC problem is split into two separate subproblem which are simultaneously solved. Thus, the paper newness is the automatic OLTC control technique, which must to maintain the optimal operation voltage value in a “controlled” point considering two parameters: the so-called fictitious voltage and the corresponding imaginary impedance. A particular MATLAB code was applied taking into account the voltage quality parameter for a real medium voltage EDN. The results confirm the robustness of the proposed approach both for OVC through OLTC optimization.","PeriodicalId":129030,"journal":{"name":"2019 International Conference on Electromechanical and Energy Systems (SIELMEN)","volume":"161 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125945023","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}