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Sensorless Control of Synchronous Reluctance Motors based on Newton-Raphson Iteration Algorithm

Sensorless Control of Synchronous Reluctance Motors based on...

引用

electrical Machines and Drives (ICEMD), International Conference on

作者： Behnam Nikmaram Mahdi S. Mousavi Zahra Khalaji S. Alireza Davari Jose Rodriguez Mehdi Fazeli Department of Electrical Engineering Shahid Rajaee Teacher Training University Tehran Iran Faculty of Technical and Engineering Raja University Qazvin Iran Faculty of Engineering Universidad San Sebastian Santiago Chile Department of Electrical Converters and Power Systems IRIEE ACECR Tehran Iran

In this paper, a position estimation algorithm is proposed for sensorless control of synchronous reluctance motors (SynRMs) using the Newton function and a closed-loop flux model. The proposed method is a phase-locked loop (PLL) technique, in which the classic proportional-integral (PI) controller is replaced by a Newton-Raphson (NR) iteration algorithm. Hence, the problem of designing PI coefficients is resolved. The active flux concept is utilized as the Newton function. To obtain the active flux, a closed-loop flux model is presented using nonlinear feedback. This methodology compensates for uncertainties such as parameter mismatch, DC offsets, and inaccurate sensor gain errors to ensure the precise estimation of the position in medium and high-speed ranges. The NR-based PLL is converged only in three iterations. Therefore, the dynamic response of the proposed method is faster than using a classic PI controller. The proposed method is validated through MATLAB-Simulink simulations and experimental tests. The results show the fast and robust performance of the position estimation in various test conditions.

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Development of a UAV-based System for Technical Diagnostics of Overhead power Lines 24

Development of a UAV-based System for Technical Diagnostics ...

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24th International Conference on Computational Problems of electrical engineering, CPEE 2023

作者： Kozlovskyi, Oleksandr Trushakov, Dmitro Rendzinyak, Serhiy Korud, Vasyl Central Ukrainian National Technical University Department of Electrical Systems and Energy Management Kropyvnytskyi Ukraine Central Ukrainian National Technical University Department of Automation and Control in Technical Systems Kropyvnytskyi Ukraine Ivan Franko National University of Lviv Faculty of Electronics and Computer Technologies Lviv Ukraine Lviv Polytechnic National University Institute of Power Engineering and Control System Lviv Ukraine

ISBN: (纸本)9798350330342

The problems associated with the operation of overhead power lines and ways of improving control over their condition with the help of UAVs are considered. A structural diagram of the system of technical diagnostics of overhead lines based on UAVs was developed, for which the necessary diagnostic parameters were selected according to informative criteria. An analysis of types of UAVs was carried out in order to determine their suitability and efficiency of use for diagnosing the condition of overhead lines. © 2023 IEEE.

关键词： Unmanned aerial vehicles (UAV)

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The Influence of Ambient Temperature on the Functioning of a Photovoltaic Installation in the Northern Part of the Russian Far East

The Influence of Ambient Temperature on the Functioning of a...

引用

International Conference on Industrial engineering, Applications and Manufacturing (ICIEAM)

作者： Nikolay Mestnikov Ahmad Alzakkar Yuri Samofalov Institute of Physical and Technical Problems of North SB RAS North-Eastern Federal University Yakutsk Russia Faculty of Mechanical and Electrical Engineering Albaath University Homs Syria Institute of Electric Power Systems and Network Kazan State Power Engineering University Kazan Russia

ISBN: (数字)9798350395013

ISBN: (纸本)9798350395020

The purpose of the study is to determine the influence of low and high ambient temperatures on the functioning of a photovoltaic (PV) installation, providing graphic interpretations and patterns. The regularities for determining the average statistical indicators of reducing and increasing the electrical energy efficiency PV panel for a certain range of ambient temperatures are used. These studies were carried out during the winter period of 2021 at the materials science laboratory of the Institute of Physical and Technical Problems of the North SB RAS using a stationary climate chamber. Control parameters for changing power generation from PV panel (in the temperature range from −60°C to +60°C) were obtained, which can be used in modeling operational processes and engineering calculations of operating modes of solar power plants. It was revealed that at the same illumination levels and ambient temperature −60°C, PV panel generates maximum energy and minimum energy at a temperature of +60°C; the decrease in specific power at this temperature range was 19%. A significant reduction in the specific PV panel is achieved at temperatures from + 30°C or more due to an increase in the internal resistance of the installation. At temperatures below −40°C, a slight increase in the specific power is achieved due to a decrease in the internal resistance PV panel.

关键词： Photovoltaic systems Resistance Temperature distribution Materials science and technology Process control Lighting Temperature control

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Study of the Applicability of Flat Reflectors in Photovoltaic Plants under Conditions of the Russian Far North

Study of the Applicability of Flat Reflectors in Photovoltai...

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International Russian Automation Conference (RusAutoCon)

ISBN: (数字)9798350349818

ISBN: (纸本)9798350349825

The paper is devoted to the study of an applied method for increasing the energy efficiency of solar energy facilities. The purpose of the article is to study the applicability of flat reflectors in photovoltaic plants operated in the northern regions of Russia. In this work the following tasks were solved: development of an algorithm for performing field studies, conducting field studies using flat reflectors for photovoltaic panels, determination of the performance indicators of a photovoltaic plant before and after using flat reflectors and performing a technical and economic assessment of the application of the proposed technical measure. A thin metal film made of aluminum alloy with impurities of silicon, tin, copper and iron in the range [0.5 – 1] % is used as a flat reflector. As a result of the work performed, it was established that in the case of using flat reflectors, the average daily output of a photovoltaic plant increases from 20 % to 37.4 %. These reflectors increase the surface temperature of photovoltaic panels 23.4 %, which reduces power generation 1.2 %. In this regard, layers of heat-insulating materials such as polyethylene terephthalate polymer film and metallized polyethylene terephthalate are added to the back of the flat reflector. It has been recorded that these layers reduce the share of reflection of the energy of thermal radiation from the sun to the photovoltaic panel with a subsequent decrease in its surface temperature 10 %.

关键词： Photovoltaic systems Economics Polyethylene Impurities Tin Aluminum alloys Silicon Iron Energy efficiency Copper

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Implementation Assessment of Tracker Installations in Solar power Plants Under Conditions of the Russian Far North

Implementation Assessment of Tracker Installations in Solar ...

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International Conference on Industrial engineering, Applications and Manufacturing (ICIEAM)

ISBN: (数字)9798350395013

ISBN: (纸本)9798350395020

The search for applied methods for increasing electricity production from solar power plants in isolated and remote territories of the North is in high demand in order to increase the fuel and energy efficiency of autonomous generation facilities. The purpose of the study is to assess the implementation effectiveness of existing tracker installations in solar power plants located in isolated and remote areas of the North. Methods were used to identify the effectiveness of implementing tracker installations in solar energy facilities and to process data of autonomous generation facilities. It has been established that the increase in electricity generation from photovoltaic panels (PV) with tracking installations has been recorded at 48.9% compared to placing the panels fixed on the ground. The share of the reduction in diesel fuel consumption due to the operation of the unit with tracker installations and PV amounted 42.6% of the average annual total fuel savings for the entire facility. The results of study can be applied in updating programs of applied measures aimed at increasing the efficiency of autonomous generation facilities in the climatic conditions of the North.

关键词： Wind energy generation Costs Electricity Snow Solar energy Production Wind power generation

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GAMS-Based Harmonics Estimation Technique for Reliable Harmonics Analysis of power Signals

GAMS-Based Harmonics Estimation Technique for Reliable Harmo...

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Annual North-American power Symposium

作者： Abdul Haseeb Muhammad Mansoor Ashraf Umar Waleed Tanveer Hussain Electrical Engineering Department University of Engineering and Technology Taxila Pakistan Faculty of Electrical Engineering Ghulam Ishaq Khan Institute of Engineering Sciences and Technology Topi Pakistan Power and Energy Systems Idaho National Laboratory Idaho Falls ID USA

Recent advances in power electronic equipments and increased penetration of non-linear loads in modern power systems have presented numerous challenges, requiring immediate and effective solutions to enhance the reliability and quality of power supply. Accurate estimation of harmonics is crucial in mitigating the detrimental effects of non-linear loads. Currently, expensive power quality analyzers are employed to analyze and estimate harmonics present in electrical systems. In this research work, a novel General Algebraic Modeling System (GAMS) based harmonics estimation technique is proposed that can effectively estimate the harmonics present in electrical signals without the need of expensive power quality analyzers. The effectiveness of the proposed technique is demonstrated by estimating the harmonics present in real-time electrical signals obtained from an Axial Flux Permanent Magnet Generator (AFPMG), Unin-terruptible power Supply (UPS) and non-linear current drawn by Light Emitting Diodes (LEDs). Several test cases are also validated considering the harmonics present in power electronics based industrial load and in VFD waveform. Results indicate the effectiveness of the proposed technique compared to that in the literature.

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Assessment of the Applicability of Manual Tracker Units in Photovoltaic Micro-power Plants under Conditions of the Russian Far North

Assessment of the Applicability of Manual Tracker Units in P...

引用

International Russian Automation Conference (RusAutoCon)

ISBN: (数字)9798350349818

ISBN: (纸本)9798350349825

The paper presents the results of research to determine the possibility of using manual tracker units in solar energy facilities. the purpose of the article is to study the applicability of manual tracker units in photovoltaic micro-power plants under the conditions of the North-East of Russia. This study solves problems of developing an algorithm for performing field studies, conducting field studies using manual tracker units, identifying the operating parameters of these units and conducting a technical and economic assessment of their use. Electricity supply to consumers in the North-East of Russia is carried out using autonomous power systems in the form of locally located diesel power plants. These facilities consume significant volumes of expensive diesel fuel, where the cost of electricity is at least 0.5$ per 1 kWh. Indicators of increasing electricity generation and reducing diesel fuel consumption were determined, subject to the use of manual trackers. In the case of using manual trackers in a photovoltaic micro-power plant, a specific average annual diesel fuel saving 0.44 ton/kW is achieved with a payback period of up to 12 years. A reduction in the specific volume of CO2 emissions is achieved at least 1.38 ton/kW per year. the main result is to demonstrate the practical use of manual tracking units in photovoltaic micro-power plants when compared with their automatic counterparts that don't operate in conditions of extremely low temperatures.

关键词： Photovoltaic systems Costs Electricity Manuals Solar energy power system reliability Planning Fuels Reliability Standards

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Study of Using Photovoltaic Solar Installations inside a Dome Structure Under Conditions of the Russian Far North

Study of Using Photovoltaic Solar Installations inside a Dom...

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International Conference on Industrial engineering, Applications and Manufacturing (ICIEAM)

ISBN: (数字)9798350395013

ISBN: (纸本)9798350395020

The purpose of the article is to study of the possibility of placing photovoltaic solar installations inside a domed structure located at North-Eastern Federal University (NEFU) in Yakutsk by preserving a significant share of power generation and determining the optimal distance between the photovoltaic solar installation and the transparent walls of the dome structure. The authors obtained: control parameters for reducing the luminous flux, the generation power of a photovoltaic installation when the operating environment changes and optimal distance for placing a photovoltaic solar installation inside a dome structure in order to reduce surface pollution of a photovoltaic solar installation. It was found that operating photovoltaic solar installations inside a transparent dome structure, the generation power drops 25.61% when compared with actual generation data in open space. It was determined that by increasing the distance between the transparent walls of the dome and the installation, the generation power drops 23% in the range (0→1.5m).

关键词： Temperature dependence Pollution Surface contamination Environmentally friendly manufacturing techniques Buildings Solar energy Industrial engineering

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Experimental Verification of Grid Inverter Operation in Urban Environment

Experimental Verification of Grid Inverter Operation in Urba...

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electrical, Electronic and Computing engineering (IcETRAN), International Conference on

作者： Milutin Petronijević Ivana Radonjić Boban Veselić Marko Dimitrijević Čedomir Milosavljević Lana Pantić Power Engineering Department Faculty of Electronic Engineering University of Niš Niš Serbia Department of Physics Faculty of Sciences and Mathematics University of Niš Niš Serbia Control Systems Department Faculty of Electronic Engineering University of Niš Niš Serbia Department of Electronics Faculty of Electronic Engineering University of Niš Niš Serbia Faculty of Electrical Engineering University of East Sarajevo East Sarajevo Bosnia & Herzegovina

ISBN: (数字)9798350386998

ISBN: (纸本)9798350387001

This study offers experimental testing of commercial and laboratory inverters, utilized in a laboratory prototype of an urban microgrid. Operation of grid inverters supplied by PV arrays in urban environments, encounters challenges such as partial shading and soiling. Emulation of the current-voltage characteristics of PV arrays enables repeated and reliable testing of inverter operation under irregular supply conditions. It has been shown that finding the maximum power point can be challenging under conditions of partial shading and soiling. Additionally, meeting the grid quality standards for the delivered power represents a challenge. Satisfying these requirements can be achieved through careful design of LCL filters at inverter output terminals, but further improvement can be achieved only through an adequate selection of the primary controller. To further improve the quality of grid currents, the possibility of applying innovative control algorithms has been demonstrated for laboratory inverters. Application of sliding mode controllers, besides ensuring system robustness, can prevent overshoots and fault responses from the current protection circuit by introducing a specific anti-windup structure.

关键词： Filters Urban areas Emulation Prototypes Microgrids Inverters Robustness

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Optimal power Flow Based on Grey Wolf Optimizer: Case Study Iraqi Super Grid High Voltage 400 kV 2nd

Optimal Power Flow Based on Grey Wolf Optimizer: Case Study ...

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2nd International Conference on Emerging Technologies and Intelligent systems, ICETIS 2022

作者： AL-Kaabi, Murtadha Salih, Sinan Q. Hussein, Al Igeb Bahaa Dumbrava, Virgil Eremia, Mircea Department of Power Systems Faculty of Energy University POLITEHNICA of Bucharest Bucharest Romania Department of School Building Ministry of Education Rusafa 3 Baghdad Iraq Department of Communication Technology Engineering College of Information Technology Imam Ja’afar Al-Sadiq University Baghdad Iraq Department Electrical and Heat Engineering. Engineering Academy People‘s Friendship University of Russian Moscow Russia

ISBN: (纸本)9783031252730

This paper deals with solving optimal power flow problems using one of the new meta-heuristic optimizations inspired by the behavior of grey wolves (Canis lupus). Optimal power flow (OPF) faced several challenged such as increased of fuel cost of generation units, increased the real power losses at transmission lines, increased of voltage deviation of each bus, and uncontrolled of voltage stability for whole system. Therefore, in this paper, the objective functions that have been optimized include generation cost (GC), power loss (PL), voltage deviation (VD), and voltage stability index (VSI). The GWO algorithm has been applied on the Iraqi Super Grid High Voltage 400 kV (ISGHV 400 kV) to set the optimal control variables. The results obtained by this algorithm have been compared with the results obtained by the initial study case to determine the percentage of reduction rate. This comparison proved the efficiency and superiority of the GWO algorithm when applied to the power system networks. The percentages of reduction rates compared with the initial case are 45.08%, 27.28%, 70.64%, and 15.40% of generation cost (GC), power loss (PL), voltage deviation (VD), and voltage stability index (VSI), respectively. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Electric power transmission

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