Tuneski, Atanasko
Preferred name
Tuneski, Atanasko
Official Name
Tuneski, Atanasko
Main Affiliation
Email
atanasko.tuneski@mf.edu.mk
16 results
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Item type:Publication, Verification of nonlinear hydro power plant models using real plant measurements(Energetika 2016, list saveza energeticara Srbije, broj 3-4 mart 2016, pp 136-141, 2016-03); ; ; - Some of the metrics are blocked by yourconsent settings
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Item type:Publication, Measurement of water quality parameters using the spectrophotometry method(University of Niš, Faculty of Mechanical Engineering, Niš, 2024-10); ; ; ; Koleva, MagdalenaHaving quality drinking water is a leading factor in maintaining public health, environmental protection, and the promotion of sustainable development in industrial and agricultural needs. Measurement and analysis of chemical parameters in drinking water are crucial for ensuring the safety and quality of water for public health. This research was conducted using the spectrophotometry method including a UVVIS DR 6000 HACH Lange spectrophotometer with a wavelength range of 190 to 1100 nm and a highspeed temperature thermostat HT 200 S. Chemical parameters that are measured in this research are chlorides, nitrates, nitrites, potassium, phosphates, and ammonium. All of them are measured on a different wavelength. Samples were taken from three measuring points, all of which are used as drinking water sources and irrigation in the nearby villages. One measuring point is a thermal spring and the other two springs from the foot of a mountain. The water from all three water sources is considerable drinking water. One sample is taken from Vardar River and its water is considered as non-drinking. The results of all measured parameters will be represented through a table and bar graphic chart. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Design of Optimal Control Model for Cascade Hydro Power Plants(SAVEZ ENERGETIČARA SRBIJE, 2020-06); ; Hydro energy represents big challenge in development of the whole society. Hydro energy plants are environment friendly, without big influence to the water, air and soil. Additionally, dams are providing benefits in form of flood control, water distribution systems for drinking and agriculture purposes. Hydro energy obtained from Hydro Power Plants (HPP) is very flexible in relation to fast changes in Energy system, with very fast starting time which make energy system more stable and secure, with higher efficiency. In this paper analysis of the optimal exploitation of the cascade HPPs, with hydraulically connected water reservoirs is made. Used optimization technique leads to design of optimal control for cascade HPPs, according to higher efficiency coefficient related to production of most energy with optimal water flow thru turbines of the HPPs, without affecting the environment. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Simulation and removal of stick-slip effect on a wicket gate hydraulic servomechanism(University Library in Kragujevac, 2021); ; ; ; Koleva, RadmilaFriction is a repeatable and undesirable problem in hydraulic systems where always has to be a tendency for its removal. In this paper, the friction model is presented through which the most accurate results are achieved and the way of friction compensation, approached trough technique presented with the mathematical model of a hydraulic cylinder of a hydro turbine wicket gate controlled by a servomechanism. Mathematical modelling of a servo mechanism and hydraulic actuator, and also the simulation of hydraulic cylinder as a part of a hydro turbine wicket gate hydraulic system where the stick-slip phenomenon is present between the system components that are in contact is presented. Applied results in this paper and the theory behind them precisely demonstrate under what circumstances the stick-slip phenomenon appears in such a system. The stick-slip effect is simulated using Simulink and Hopsan software and the analysis of the results are given in this paper. Removal of the stick-slip effect is presented with the design of a cascade control implemented to control the behaviour of the system and remove the appearance of a jerking motion.</jats:p> - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Implementation of nonlinear mixed mode controller in the hydro power plant control(Proc. of ENERGY 2015, Zlatibor, Serbia, 2015); ; - Some of the metrics are blocked by yourconsent settings
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Item type:Publication, Simulacija i odstranjivanje stick-slip efekta servosistema sprovodnog aparata hidraulične turbine(University Library in Kragujevac, 2021-01); ; ; ; Friction is a repeatable and undesirable problem in hydraulic systems where always has to be a tendency for its removal. In this paper, the friction model is presented through which the most accurate results are achieved and the way of friction compensation, approached trough technique presented with the mathematical model of a hydraulic cylinder of a hydro turbine wicket gate controlled by a servomechanism. Mathematical modelling of a servo mechanism and hydraulic actuator, and also the simulation of hydraulic cylinder as a part of a hydro turbine wicket gate hydraulic system where the stick-slip phenomenon is present between the system components that are in contact is presented. Applied results in this paper and the theory behind them precisely demonstrate under what circumstances the stick-slip phenomenon appears in such a system. The stick-slip effect is simulated using Simulink and Hopsan software and the analysis of the results are given in this paper. Removal of the stick-slip effect is presented with the design of a cascade control implemented to control the behaviour of the system and remove the appearance of a jerking motion. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Modeling and simulation of a hydraulic system under conditions of the stick-slip effect occurence and its removal(2019-10); ; ; Koleva, Radmila - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Hardware-in-the-loop for simulation of hydraulic servo systems and their control(IEEE, 2017-06); ; ; Rath, Gerhard