Wyniki wyszukiwania dla: POWER SYSTEM - MOST Wiedzy

Wyszukiwarka

Wyniki wyszukiwania dla: POWER SYSTEM

Wyniki wyszukiwania dla: POWER SYSTEM

  • Virtual inertia in Electric Power System

    The article presents the idea of introducing virtual inertia system to the electric power systems. The virtual inertia aim is to reduce or eliminate the effect of reducing the inertia of the power system as a result of replacing classic electricity generating units with renewable renergy sources (RES). The considerations are ilustrated by a computational example.

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Low voltage photovoltaic power system

    The use of photovoltaics is growing rapidly in the industry as well as households. Therefore, educating the public will help them understand solar cell technology, which is becoming more common in everyday life. This paper proposes a demonstrational set-up of photovoltaic panel for the purpose of science education. It was used in numerous outreach activities such as science fairs. Moreover, it proved to be a great tool for education...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • New Performance Indices for Power System Stabilizers

    Publikacja

    - ENERGIES - Rok 2022

    The subject of the article is issues related to innovative indices for power system stabilizers (PSSs). These new indices will be able to quickly show which PSS (among many other PSSs) is not working properly and that advanced optimization and simulation methods should be used to improve the PSS settings. The authors note the fact that the acceptance requirements for PSSs are different in various power systems. Moreover, the authors...

    Pełny tekst do pobrania w portalu

  • Security Information Sharing for the Polish Power System

    Publikacja

    - Rok 2015

    The Polish Power System is becoming increasingly more dependent on Information and Communication Technologies which results in its exposure to cyberattacks, including the evolved and highly sophisticated threats such as Advanced Persistent Threats or Distributed Denial of Service attacks. The most exposed components are SCADA systems in substations and Distributed Control Systems in power plants. When addressing this situation...

  • THE PHASE SHIFTERS INFLUENCE ON THE POWER SYSTEM STABILITY

    Publikacja

    The paper presents the effect of phase shifters as FACTS devices on the possibility of improving the angle stability. Presented results obtained by the dynamic simulation performed on the mathematical model of the three machine system cooperating with the 400 kV network. The generative blocks models include turbine models with their controllers and models of synchronous generators with their excitation systems and voltage regulation....

  • Installation of Compensators in the Power System Transmission Grid

    Publikacja

    - Acta Energetica - Rok 2019

    The article discusses issues of reactive power compensation in transmission grids, with particular focus on the selection of compensator locations and basic parameters. Attention was focused on modern power electronics systems that ensure full automatic compensator adjustment to voltage or power criteria.

    Pełny tekst do pobrania w portalu

  • Wind farms influence on power system stability

    Publikacja

    W artykule przedstawiono analizę wpływu elektrowni i farm wiatrowych na stabilność systemu elektroenergetycznego. Pokazano wyniki pomiarów modów kołysań elektromechanicznych wykonanych w rzeczywistym systemie elektroenergetycznym.

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Power Hardware-in-the-Loop Approach In Power System Development

    The main objective of the research is the verification of the Power Hardware-In-The-Loop (PHIL) approach in power system analysis and design. The premise of the article is that using PHIL approach the performance of the power system in steady and transient state conditions can be analysed in real power system conditions. Models of induction machine were developed and real time simulations were performed. Simulation variables were...

    Pełny tekst do pobrania w portalu

  • Voltage control in a power system with renewable sources of energy

    Publikacja

    - Rok 2019

    Intensive development of distributed generation in power systems, caused by the European Union energy policy, gives possibility for improving safety in power delivery as well as optimizing the costs of the systems functioning. In this context, distributed generation can be used for voltage control in power systems – it can be performed by the control of reactive power of each source of energy or a group of energy sources. This...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Power System Dynamics. Stability and Control. 3rd edition

    Publikacja

    - Rok 2020

    Comprehensive, state-of-the-art review of information on the electric power system dynamics and stability. It places the emphasis first on understanding the underlying physical principles before proceeding to more complex models and algorithms. The book explores the influence of classical sources of energy, wind farms and virtual power plants, power plants inertia and control strategy on power system stability. The book cover...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Blackout initial disturbances in electric Power System searching

    Publikacja

    The paper contains short survey of the blackouts that took place in the last few years. The sources and initial disturbances are discussed. The typical scenario of the disturbance, leading to blackout in the electrical power system are presented.Next, models of a power system eligible to considered topic are discussed. Finally the algorithm of the blackout initial disturbances in power system searching is presented.The consideration...

  • Steam turbines governors in power system restoration process

    Publikacja

    The paper discusses problems related to electric power system restoration process. The turbine controller operating mode influence in small subsystem is analyzed. There are considered abilities, advantages and drawbacks of the controller's two operating modes: power control and speed (frequen-cy) control, to rebuild electric power system from a single generating unit to a few parallel running generators.

  • Optimizing the parameters of a small standalone hybrid power system

    Publikacja

    A hybrid power plant consists of renewable energy resources, an energy storage, a discharge load and an emergency power supply. Power plant parameters are tailored to meet the requirements of continuity of supply, cost minimization, return on investment period and system capacity utilization. The papaer presents the methodology for selecting power plant parameters with a larger number of decision criteria. The task is solved...

    Pełny tekst do pobrania w portalu

  • Optimal linear control theory in power system application

    Publikacja

    Przedstawiono syntezę stabilizatora systemowego przy wykorzystaniu metodyki Hinf. Zaprojektowany regulator umożliwia uzyskanie lepszych rezultatów w porównaniu z regulatorem odniesienia w szerokim zakresie zmian punktu pracy.

  • Delivery of Ancillary Services in Distribution Power Systems

    One of the technical and organizational challenges the power system faces in deregulated market conditions is to organize an ancillary services market. The growing share of distributed generation of variable (intermittent) energy sources and a change in the market position of consumers, causes the demand for distributed delivery of ancillary services. For this purpose, it is sought to use the ability of the regulatory measures:...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Modelling of power electronic compensators for the analysis of power system operation

    Publikacja

    The article presents selected methods of modelling power electronic compensators in order to analyze their operation in the power systems. Advantages and disadvantages of models have been shown with an indication of their usefulness for modelling specific phenomena.

    Pełny tekst do pobrania w portalu

  • An application of multi-agent system for ship’s power systems design

    Publikacja

    - Rok 2016

    Design process of transport ship power system consists of structure (topology) and component elements selection. Compliance with the requirements for static components does not guarantee optimal dynamic characteristics of entire power system. Design steps are difficult to formalize and as a consequence to this reason expert and multi-agent systems are used for solving selected design issues. In the paper distributed multi-agent...

  • Problems of Connecting Wind Farms to the Power System with HV Cables

    Publikacja

    This paper presents problems caused by connecting wind farms to a power system with high voltage cables. The author highlights possible problems with reactive power compensation, depending on the arrangement of the shunt reactor connection and settings of control systems for reactive power and voltage of the wind farm. The paper also discusses issues of increasing active power losses caused by a shunt reactor installation.

    Pełny tekst do pobrania w portalu

  • Analysis of the Impact of Charging Electric Cars on the Power System Load

    Publikacja

    The paper presents ways of integrating electric cars with the power system. In connection with this, daily load curves in the average working day have been developed in the G2V (Grid-to-Vehicle) and V2G (Vehicle-to-Grid) variants. The G2V solution consists in unidirectional energy flow from the power system to a vehicle’s battery. The V2G solution consists in bi-directional energy exchange between the power system and electric...

    Pełny tekst do pobrania w portalu

  • CAES – Energy storage providing stability for national power system

    Publikacja

    - Rok 2013

    This paper presents a short characteristics of the power system. It also describes various types of energy storage technologies. The suggested solution of accumulation and generation of electric power is based on the cooperation of gas turbine with Compressed Air Storage Energy systems – CAES. This analysis describes also various types of cooperation of CAES and renewable sources of energy, particularly wind power systems.

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Multimachine power system stability improvement using fuzzy control.

    Publikacja

    - Rok 2004

    W celu poprawienia stabilności dynamicznej turbogeneratora i powiększenia tłumienia kołysań elektromechanicznych opracowano regulator napięcia wraz z stabilizatorem systemowym z wykorzystaniem teorię zbiorów rozmytych. Efektywność opracowanego rozmytego algorytmu oceniono w układzie wielomaszynowym.

  • Wind Turbine Operation in Electric Power System.Advanced Modelling

    Publikacja

    - Rok 2003

    W monografii przedstawiono zagadnienia związane z pracą elektrowni wiatrowych w systemie elektroenergetycznym, a w tym przedstawiono wpływ elektrowni wiatrowych na system elektroenergetyczny (jakość energii elektrycznej). Omówiono zasady modelowania elektrowni wiatrowych różnych typów, tj. z generatorami asynchronicznymi i synchronicznymi, pracujących w systemie elektroenergetycznym. Przestawiono wybrane modele elektrowni wiatrowych...

  • Situational Awareness Network for the Electric Power System: the Architecture and Testing Metrics

    The contemporary electric power system is highly dependent on Information and Communication Technologies which results in its exposure to new types of threats, such as Advanced Persistent Threats (APT) or Distributed-Denial-of-Service (DDoS) attacks. The most exposed components are Industrial Control Systems in substations and Distributed Control Systems in power plants. Therefore, it is necessary to ensure the cyber security of...

    Pełny tekst do pobrania w portalu

  • Security Requirements and Controls for Incident Information Sharing in the Polish Power System

    Publikacja

    Among the strategies of protecting information assets of the power system, sharing of information about current cybersecurity incidents between energy operators appears to be a prerequisite. Exchange of information leads to the effective detection of attacks and exploited vulnerabilities as well as the identification of countermeasures. This paper presents the results of continuation of our works on developing a secure and efficient...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Management Information Base module for electrical power system configuration and use

    Publikacja

    - Rok 2012

    Internet standards describe a virtual information store, termed the Management Information Base (MIB), which is made available through Simple Network Management Protocol (SNMP). No standard MIB exists to date for monitoring power lines in facilities over IP network. This paper defines a subset of the MIB for power system monitoring.

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Models of Brushless Synchronous Generator for Studying Autonomous Electrical Power System

    Publikacja

    - Rok 2020

    This is a PhD dissertation. The work presented in this monograph was carried out at the Department of Power Electronics and Electrical Machines, Faculty of Electrical and Control Engineering at the Gdansk University of Technology. Developed during the research models of brushless synchronous generator ware verified using FEM based simulations and measurements conducted on the prototype generator. The main focus of the research...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Advanced Lithium-Ion Battery Model for Power System Performance Analysis

    Publikacja

    - ENERGIES - Rok 2020

    The paper describes a novel approach in battery storage system modelling. Different types of lithium-ion batteries exhibit differences in performance due to the battery anode and cathode materials being the determining factors in the storage system performance. Because of this, the influence of model parameters on the model accuracy can be different for different battery types. These models are used in battery management system...

    Pełny tekst do pobrania w portalu

  • Modelling of Voltage Transformer Performance in Power System Harmonic Frequency Range

    Zniekształcenia harmoniczne napięć i prądów występujące we współczesnych systemach energetycznych powodują liczne problemy pomiarowe. W referacie przedstawiono analizę właściwości przekładników napięciowych stosowanych w sieciach SN i WN w zakresie częstotliwości mierzonych zniekształceń harmonicznych. Opracowany szerokopasmowy model obwodowy został zweryfikowany symulacyjnie i eksperymentalnie. Wyniki przeprowadzonych badań potwierdzają...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Modelling of voltage transformer performance in power system harmonic frequency range

    Publikacja

    - Rok 2008

    Zniekształcenia harmoniczne napięć i prądów występujące we współczesnych systemach energetycznych powodują liczne problemy pomiarowe. W referacie przedstawiono analizę właściwości przekładników napięciowych stosowanych w sieciach SN i WN w zakresie częstotliwości mierzonych zniekształceń harmonicznych. Opracowany szerokopasmowy model obwodowy został zweryfikowany symulacyjnie i eksperymentalnie. Wyniki przeprowadzonych badań potwierdzają...

  • Effect of contactless hybrid current limiter on voltage dips in power system

    Publikacja

    - Rok 2003

    W referacie przedstawiono działanie hybrydowego niskonapięciowego ogranicznika prądu zwarciowego, składającego się z ultraszybkiego bezpiecznika, tranzystora mocy i warystora. W szczególności omówiono możliwości polepszenia jakości dostarczanej do odbiorców energii elektrycznej. Zastosowanie hybrydowego ogranicznika prądu znacznie ogranicza czasy trwania zapadów napięcia w systemie elektroenergetycznym. Obliczenia wykonano przy...

  • Effect of contactless hybrid current limiter on voltage dips in power system.

    Publikacja

    - Rok 2003

    W referacie przedstawiono działanie hybrydowego niskonapięciowego ogranicznika prądu zwarciowego, składającego się z ultraszybkiego bezpiecznika, tranzystora mocy i warystora. W szczególności omówiono możliwości polepszenia jakości dostarczanej do odbiorców energii elektrycznej. Zastosowanie hybrydowego ogranicznika prądu znacznie ogranicza czasy trwania zapadów napięcia w systemie elektroenergetycznym. Obliczenia wykonano przy...

  • Interior Point Method Evaluation for Reactive Power Flow Optimization in the Power System

    The paper verifies the performance of an interior point method in reactive power flow optimization in the power system. The study was conducted on a 28 node CIGRE system, using the interior point method optimization procedures implemented in Power Factory software.

    Pełny tekst do pobrania w portalu

  • Power System Stabilizer as a Part of a Generator MPC Adaptive Predictive Control System

    Publikacja

    - ENERGIES - Rok 2021

    In this paper, a model predictive controller based on a generator model for prediction purposes is proposed to replace a standard generator controller with a stabilizer of a power system. Such a local controller utilizes an input-output model of the system taking into consideration not only a generator voltage Ug but also an additional, auxiliary signal (e.g., α, Pg, or ωg). This additional piece of information allows for taking...

    Pełny tekst do pobrania w portalu

  • Analysis of an Energy Management System of a Small Plant Connected to the Rural Power System

    Publikacja

    - ENERGIES - Rok 2022

    This paper presents the analysis of an energy management system (EMS) implemented to fulfill the requirements of a microgrid (MG) power supply owned by a small industrial company and connected to the rural power system. The main goal of this system is to ensure connection with the existing rural power system in terms of energy exchange, as well as to perform islanding mode operation of the microgrid based on the energy demand of...

    Pełny tekst do pobrania w portalu

  • Solutions of Power Electronics Converter for the Shore - to - Ship Power Systems

    W artykule poruszono tematykę zasilania statków zacumowanych w porcie z lądowej sieci elektroenergetycznej poprzez wykorzystanie nowoczesnych konstrukcji przekształtników energoelektronicznych. Zaproponowano budowę sieci dystrybucyjnej prądu stałego, przewoźnej platformy zasilającej oraz zastosowanie zasobników energii

    Pełny tekst do pobrania w serwisie zewnętrznym

  • THE INFLUENCE OF PHASE SHIFTERS ON THE VOLTAGE STABILITY OF CONNECTED POWER SYSTEMS

    Publikacja

    The paper presents the results of simulation tests of connected power systems in which phase shifters were installed on cross-border links. The analysis was carried out in terms of assessing the impact of shifters on node voltage stability. Individual systems were characterized by different balance of active power: deficit or excess. The evaluation of voltage stability was based on the dU/dQ and dU/dP criteria.

  • The issues of quantum in empirical research on machines and other power systems

    Publikacja

    W pracy uzasadniono, że w badaniach naukowych systemów empirycznych, zwłaszcza maszyn jak również i innych urządzeń energetycznych, należy uwzględnić istniejącą w ich eksploatacji przypadkowość i nieprzewidywalność zdarzeń. Nawiązano do osiągnięć mechaniki kwantowej wskazując na wynikający z nich postulat, że wielkości nazywane komplementarnymi, mają istotną własność, która polega na tym, że niemożliwy jest jednoczesny i zarazem...

    Pełny tekst do pobrania w portalu

  • On the power systems performance control starting from disturbances measurements

    Publikacja

    - Rok 2003

    Referat przedstawia badanie działania układu sterowania w systemie elektroenergetycznym oparte na oszacowanie parametrów. Na podstawie pomiarów wykonanych w stanie zakłóconiowym, parametry te są oszacowane minimizując uchyb pomiędzy wartościami wielkości uzyskanych z pomiarów i wartościami wielkości wyjściowych modelu systemu elektroenergetycznego. W celu zmniejszenia tego uchybu, proponowano dwie metody: klasyczna oparta na czułości...

  • Computer-aided analysis of resonance risk in power system with Static Var Compensators

    Static Var Compensators operation in a power system may significantly improve voltage profiles in nodes and the reactive power balance, as well as ensure greater system stability in emergency conditions. However these devices may be a cause of a resonance in the system. The aim of this paper is to call attention to the need to include resonance phenomena in a compensator’s location evaluation process. The analysis performed in...

    Pełny tekst do pobrania w portalu

  • Magnetic Field Generated by Short Circuit Current in the 110 kV Power System

    Publikacja

    - Rok 2014

    Electric fields within tissues induced by magnetic fields including transients or short-term peaks should not be time averaged and be regarded as instantaneous values as established in the ICNIRP (International Commission on Non - Ionizing Radiation Protection) guidelines. Measurements of power lines magnetic fields with regard to human beings exposure are carried out typically with maximum current load at current balance condition...

  • Hydro Power Plant in the Process of Voltage Control in the Electric Power System and the System Restoration

    Publikacja

    - Acta Energetica - Rok 2019

    The article covers selected issues related to the share of hydroelectric power in the process of rebuilding the power system after black-out and voltage control during that process. Selected results of measurements made during the creation of the transmission chain for the need to start a block of a thermal power plant from a hydroelectric power plant were presented.

    Pełny tekst do pobrania w portalu

  • Voltage and Reactive Power Load Flow Optimization in the Power System Using Fuzzy Logic

    The paper presents issues related to voltage control in the power system. An original method of reactive power flow optimization is considered, which leads to improved voltages in the power system and reduced active power losses. The optimization method is based on a procedure that employs fuzzy logic and is supported by a gradient search algorithm. The method has been implemented in PLANS software and verified.

    Pełny tekst do pobrania w portalu

  • SELECTED COMBINED POWER SYSTEMS CONSISTED OF SELFIGNITION ENGINE AND STEAM TURBINE

    This paper presents optimization of selected combined diesel engine-steam turbine systems. Two systems: the system combined with waste heat one-pressure boiler only and its version containing additionally low-pressure boiler proper feeding degasifier and the system of two-pressure cycle, were taken into considerations. Their surplus values of power output and efficiency associated with utilization of waste heat contained in piston...

    Pełny tekst do pobrania w portalu

  • Influence of Shunt Compensation with SVC Devices on Resonance Risk in Power Systems

    Many analyses are required to locate a new reactive power source in a power system. The choice of a location is a very complex matter which requires various aspects to be considered. Selecting a location also entails the necessity to assess it from the point of view of the selected compensator’s structure as well as the system’s performance in various states with the new device on. The paper presents the issues of assessing compensator...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Operational loads of power systems of bucket dredgers in main service states

    Publikacja

    W artykule zaprezentowano wyniki badań eksploatacyjnych silników spalinowych układów energetycznych pogłębiarek wieloczerpakowych. Badania dotyczyły obciążeń silników głównych i pomocniczych w podstawowych stanach eksploatacji pogłębiarki wieloczerpakowej.

    Pełny tekst do pobrania w portalu

  • Nonlinear Model of Synchronous Generator for Autonomous Electrical Power Systems Analysis

    Publikacja

    This paper presents the nonlinear lookup table model for synchronous generator (SG) analysis. The saturation effects of the SG magnetic circuit have been considered. The saturated characteristic of the SG magnetic circuit are based on the open circuit saturation curve for magnetizing inductances. The model has been implemented into the Synopsys/Saber software using the MAST modelling language. To implement the no-load voltage characteristic...

  • Evaluation of VSC Impact on Power System Using Adequate P-Q Capability Curve

    Publikacja

    - Electronics - Rok 2023

    Renewable energy sources, which are becoming increasingly popular, often use a voltage source converter (VSC) for connection to the power system. Assessing the effects of connecting such a source to the power system is essential to ensure the proper operation of the power system and the connected source. For this purpose, it is necessary to know the range of active and reactive power generation by the converter. The authors indicate...

    Pełny tekst do pobrania w portalu

  • Optimal Placement of Phasor Measurement Unit in Power System using Meta-Heuristic Algorithms

    Publikacja

    - Electrotehnica, Electronica, Automatica - Rok 2019

    The phasor measurement units (PMUs) play an important and vital role in power system monitoring and controlling, since they provide the power system phasors stamped with a common real time reference through a global positioning system (GPS). Indeed, from economical point of view it is not possible to set PMUs in all system buses due to the high cost and the requirement of more complex communication...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Nonlinear model of a synchronous generator for analysis of more electric aircraft power systems

    A nonlinear model for studying a variable-speed synchronous generator (SG) in more electric aircraft (MEA) power system has been developed. The saturation effects of the SG magnetic circuit have been considered. The model has been implemented in the Synopys/Saber simulation environment. The modelling language MAST has been used to elaborate the SG model. The model exhibit a network with the same number of external terminals/ports...

  • Analysis of Ferroresonance Mitigation Effectiveness in Auxiliary Power Systems of High-Voltage Substations

    Publikacja
    • R. Tarko
    • W. Nowak
    • J. Gajdzica
    • S. Czapp

    - ENERGIES - Rok 2024

    Ferroresonance in power networks is a dangerous phenomenon, which may result in overcurrents and overvoltages, causing damage to power equipment and the faulty operation of protection systems. For this reason, the possibility of the occurrence of ferroresonance has to be identified, and adequate methods need to be incorporated to eliminate or reduce its effects. The aim of this paper is to evaluate the effectiveness of ferroresonance...

    Pełny tekst do pobrania w portalu