MODELING OF USE ELECTRIC ENERGY STORAGES WITH SYNCHRONOUS GENERATOR TO IMPROVE QUALITY ELECTRICITY SUPPLY OF INDUSTRIAL CONSUMERS

2018 ◽  
Author(s):  
Камиль Бахтеев ◽  
Kamil' Bahteev ◽  
Александр Федотов ◽  
Aleksandr Fedotov ◽  
Р Мисбахов ◽  
...  
Keyword(s):  
Electric Energy ◽  
Synchronous Generator ◽  
Electricity Supply ◽  
Improve Quality

scholarly journals ANALYSIS OF OVERVOLTAGE POSSIBILITY ON THE EXCITATION WINDING OF A SYNCHRONOUS GENERATOR OF AUTONOMOUS POWER SUPPLY SYSTEM IN CASE OF EXTERNAL SYMMETRICAL SHORT CIRCUIT

2021 ◽  
pp. 112-115
Author(s):  
V.B. Beliy ◽  
Keyword(s):  
Power Systems ◽  
Power Supply ◽  
Short Circuit ◽  
Electric Energy ◽  
Synchronous Generator ◽  
Synchronous Generators ◽  
Excitation System ◽  
Three Phase ◽  
Short Circuits ◽  
Analytical Expressions

Reliable supply of consumers with electric energy largely depends on the reliability of power source function-ing. In the context of this paper it depends on synchronous generators operating in autonomous power supply sys-tems. In contrast to the power plant generators which are part of power systems and are protected from the loads by sufficiently large resistances, power supply systems withautonomous generators are characterized by rather low resistances. Abrupt changes in the supply load parameters, their own transient and emergency modes, for example, short circuits at the generator terminals, forcing excitation, etc. may lead to various failures in the synchronous gener-ator operation. This paper discusses the possibility of over-voltage in the valve excitation system of a synchronous generator with external three-phase short circuits. On the basis of analytical expressions describing the physical pro-cesses occurring in the excitation system of synchronous generators, the conditions for the occurrence of overvolt-ages are identified

scholarly journals DEVELOPMENT OF AN AUTOMATED SYSTEM FOR COMMERCIAL ACCOUNTING OF ELECTRIC ENERGY IN THE VILLAGE OF RAILWAY USOLSK REGION

2021 ◽  
Vol 1 (1) ◽  
pp. 219-220
Author(s):  
Igor' Golovanov ◽  
Vladislav Baranov
Keyword(s):  
Electric Energy ◽  
Supply System ◽  
Automated System ◽  
Electricity Supply ◽  
Commercial Accounting ◽  
The Village

The option of introducing an automated system of commercial accounting of electric energy into the electricity supply system of the Railway village of Usolsky district has been considered.

scholarly journals Micro Hydropower System Design for Gua Kelam Electricity Supply

2018 ◽  
Vol 7 (2) ◽  
pp. 120
Author(s):  
Mamoud A. M. Albreem ◽  
Rosnita Md Aspan
Keyword(s):  
Renewable Resources ◽  
Electrical Power ◽  
Synchronous Generator ◽  
Electrical Energy ◽  
Hydraulic Turbine ◽  
Electricity Supply ◽  
Alternative Source ◽  
Renewable Sources ◽  
Proposed Model ◽  
Hydropower System

Sufficient and uninterrupted electricity supply is one of the main factors to develop the country. Today, electricity can be generated using a variety of sources, whether from non-renewable sources as well as renewable resources. To generate electrical power, Malaysia can't rely entirely on non-renewable resources such as petroleum and coal as these are finite resources which are experiencing depletion around the world. Electricity generated from renewable sources such as water, particularly from micro hydropower systems is considered the cheapest and most environmentally friendly source of electrical energy. Based on the reconnaissance study conducted, the streams of flowing water in Gua Kelam have the potential to yield about 34.29 kW of electricity power, based on the head height of 27 m and flow rate 0.216 m3/s. In this paper, a model for an ordinary micro hydropower facility has been proposed. It links various electromechanical equipment consisting of a hydraulic turbine governor, and a synchronous generator. The modeling was executed to design a micro hydropower system as an alternative source of supply of electricity to Gua Kelam, Perlis. The proposed model was tested by placing a three-phase fault to earth for the purpose of testing the reliability of the system. With the selection of an appropriate control system, the proposed model is very suitable for the development of micro hydropower system at a potential site such as Gua Kelam.

scholarly journals Research of Operation of Predictive Controllers of Distributed Generation Plant in Power Supply System with Energy Storage

2021 ◽  
pp. 448-458
Author(s):  
Yuri N. Bulatov ◽  
Andrey V. Kryukov ◽  
Konstantin V. Suslov
Keyword(s):  
Energy Storage ◽  
Distributed Generation ◽  
Power Supply ◽  
Power Supply System ◽  
Electric Energy ◽  
Synchronous Generator ◽  
Supply System ◽  
Storage Device ◽  
Energy Storage Device ◽  
Predictive Controllers

The article discusses the power supply system of an industrial enterprise, which included a turbine generator plant operating on the basis of a synchronous generator equipped with predictive voltage and rotor speed controllers, as well as a high-power electric energy storage device. A description of the models of this plant, predictive controllers and energy storage, as well as the results of modeling when the system goes into an isolated mode of operation are given. Simulation was performed in MATLAB environment using Simulink and SimPowerSystems packages. The purpose of the work was to study the behavior of the proposed predictive controllers during the transition of the power supply system to the island (isolated) mode. Based on the results of computer simulation, it was concluded that the use of predictive controllers improves the damping properties of the system. The use of an energy storage device that is automatically connected to the network when the voltage drops, allows to reduce the overvoltage at the terminals of the generator during its unloading, as well as to reduce the required mechanical power on the turbine shaft in comparison with a permanently connected device. Predictive controllers can be recommended to increase the stability of distributed generation plants when switching to an isolated mode. It is advisable to conduct further research in the direction of creating algorithms for coordinated operation of controllers

scholarly journals RISKS OF REGULATION IN NETWORK INDUSTRY – CASE OF THE SLOVAK REPUBLIC

2017 ◽  
Vol 5 ◽  
pp. 228-231 ◽  
Author(s):  
Jozef KluÄŤka
Keyword(s):  
Water Supply ◽  
Slovak Republic ◽  
External Environment ◽  
Electric Energy ◽  
Price Regulation ◽  
Electricity Supply ◽  
Network Industries ◽  
Postal Services ◽  
State Enterprises

Historically, the Slovak Republic infrastructure involved monopolies, with the State operating sectors of electricity, telecommunications, postal services, gas, and water supply through state enterprises. The electric energy sector has since become privatized in the Slovak Republic. Because of insufficient competition (oligopoly), a regulatory office formed with the role of price regulation. In this pricing area, the electricity supply sector suffered turmoil in the Slovak Republic. This paper addresses some practicalities of regulation and proposes measures to minimize risks relating to decisions of the regulating authority. The current issues reflect problems of price regulation of electricity in the Slovak Republic that have resulted in political disputes. This paper describes the regulatory framework of network industries in the Slovak Republic and general assumptions for transparent and efficient regulatory process. It includes an analysis of certain aspects of price regulation and the role and responsibilities of a chairman and other stakeholders in this process. Some measures are proposed to minimize the future risks of price regulation. These measures cover internal subjects and processes as well as the external environment involving stakeholders and their influence on negotiating prices.

DTC-SVM Control for Permanent Magnet Synchronous Generator based Variable Speed Wind Turbine

2017 ◽  
Vol 8 (4) ◽  
pp. 1732 ◽  
Author(s):  
Youness El Mourabit ◽  
Aziz Derouich ◽  
Abdelaziz El Ghzizal ◽  
Najib El Ouanjli ◽  
Othmane Zamzoum
Keyword(s):  
Wind Turbine ◽  
Permanent Magnet ◽  
Production Efficiency ◽  
Direct Torque Control ◽  
Electric Energy ◽  
Synchronous Generator ◽  
Torque Ripple ◽  
Torque Control ◽  
Switching Frequency ◽  
Permanent Magnet Synchronous Generator

<span lang="EN-US">In this paper, we are interested in improving the production efficiency for electric energy extracted from a wind turbine, based on a permanent magnet synchronous generator (PMSG) that we want to improve the performance by means of direct torque control with space vector modulation (DTC-SVM). The choice of this control comes from the deficiencies inherent to the conventional DTC, which includes variable switching frequency, torque ripple and implementation complexity. First we focuse on the wind energy conversion system (WECS) modeling using the PMSG machine, as well as the detailed study for the control DTC-SVM operating principle. Then, system performance is tested and compared by simulation in the MATLAB/Simulink in terms of follow instructions, robustness to the variations of the external system elements, and effectiveness of the expected method.</span>

scholarly journals Automatic voltage regulation system construction for synchronous generator of a small hydro power plant using thyristor pathogens

2020 ◽  
Vol 178 ◽  
pp. 01036
Author(s):  
Ishembek Kadyrov ◽  
Nurzat Karaeva ◽  
Zheenbek Andarbekov ◽  
Bakytuulu Azamat ◽  
Oleg Fedorov ◽  
...  
Keyword(s):  
Electric Energy ◽  
Synchronous Generator ◽  
Voltage Regulation ◽  
Regulation System ◽  
Small Hydropower ◽  
Hydro Power ◽  
Hydraulic Unit ◽  
Hydropower Plants ◽  
Hydropower Potential ◽  
The Republic

The article presents indicators of the hydropower potential of Kyrgyzstan, shows the share of small hydropower plants in the production of electric energy in the energy sector of the republic, reveals the problematic issues that need to be revealed in this work. A brief description of the existing automatic voltage regulation system and automatic field blanking system is given. Based on the analysis of existing systems, their shortcomings were identified and the main functions formulated for automatic voltage regulation systems in both static and dynamic modes associated with starting and stopping the generator, loading and dumping, as well as protective measures taken to ensure reliability operation of the hydraulic unit. The result of the research is the development of the main functional blocks in the system of automatic voltage regulation with a thyristor pathogen and a brief explanation of their work. The synthesis technique of the excitation current regulator of a synchronous generator and the main indicators obtained in the modernization process are shown. In conclusion, all the functions inherent in the modernized system for automatically controlling the excitation of a synchronous generator, aimed at the safe operation of the hydraulic unit, are noted.

scholarly journals Electric Energy Reuse of Plastic Injection Machine Motors for Lighting Circuit in a Manaus-Amazonas Industrial Pole Company

2019 ◽  
Vol 7 (10) ◽  
pp. 637-645
Author(s):  
João Batista Lopes Gonçalves Junior ◽  
Livia Da Silva Oliveira ◽  
David Barbosa de Alencar ◽  
Jorge De Almeida Brito Junior
Keyword(s):  
Induction Motor ◽  
Electrical Power ◽  
Electric Energy ◽  
Power Saving ◽  
Synchronous Generator ◽  
Electrical Energy ◽  
Operating Regime ◽  
Energy Usage ◽  
Three Phase ◽  
Plastic Injection

This work aims to reuse the electric energy used in three-phase induction motors of an industrial plastic injector for the lighting circuit of the same warehouse where the injectors are located, thus eliminating the need to use the energy of the electric company. Any resource that reuses electricity with better efficiency becomes essential today, making it a solution for industries that are thinking of saving the energy used in the productive processes in the manufacture of goods.This project uses a synchronous generator coupled to a three-phase induction motor of a plastic injector, which will reuse the electrical energy used of the induction motor to mechanically drive the synchronous generator, that will be able to generate enough electrical power in its coils for a 47-light shed lighting circuit, thus eliminating the need to use utility power, saving a portion of the energy usage costs on the monthly bill. This installation of the synchronous generator was performed on equipment of the company Moto Honda da Amazônia, which has a 24-hour operating regime for six days a week.

scholarly journals Electric energy planning in Namibe, Angola: Inserting renewable energies in search of a sustainable energy mix

2021 ◽  
Vol 32 (4) ◽  
pp. 69-83
Author(s):  
I. Lemba ◽  
M. Ferreira Dias ◽  
M. Robaina
Keyword(s):  
Natural Gas ◽  
Socioeconomic Development ◽  
Electric Energy ◽  
Planning System ◽  
Electricity Production ◽  
Energy Output ◽  
Production Reserve ◽  
Electricity Supply ◽  
Energy Mix ◽  
Ghg Reduction

The socioeconomic development of any region requires electricity for operating the various sectors of the economy. Sometimes energy is scarce, not only because of the lack of energy resources, but also because energy policy is inadequate or non-existent. This paper examines the situation in the province of Namibe, Angola, characterising the energy sector, and proposing an energy mix for the security of electricity supply, environmental protection and sustainable economic development. Using the Long-range Energy Alternative and Planning System, energy scenarios were simulated and the greenhouse gas emissions (GHGs) for the period 2014-2040 calculated and analysed. The most sustainable scenario, in terms of energy mix diversification and GHG reduction, as well as the least costly (considering electricity production and carbon costs), has an increase of hydro capacity and the insertion of wind, solar photovoltaic, thermoelectric sources and natural gas. Given the intermittency of photovoltaic and wind systems, natural gas appears in this scenario as a way to avoid interruptions in the electricity supply. This scenario is the one with the largest production reserve margin of 24.47 %, and emissions are avoided at 386 550 tCO2eq compared to the base scenario in 2040. Energy policymakers can take this scenario as a model to assist in making decisions on how power capacities can be installed over the planned time for the desired energy output.

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