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This paper deals a method of determining the optimal operation of the induction generator in off-grid for small-scale wind power. Evaluation of itself optimum operation is partly performed using model, which was created in program EMTP - ATP. Operating states of the generator is possible simulate there and determine operational capabilities of a specific type of generator for different type and size...
Transmission lines faults are an inevitable part of any power system. They cause a disruption in the power supply, which is undesirable. With an ever-increasing demand for better performance and minimal interruptions, accurate fault analysis is necessary to restore a system to its normal operation by detecting and clearing the transmission line fault. This paper presents a comprehensive review of...
Power system stability issues are extremely important for safe and effective operation of the system. They can be categorized as rotor angle, frequency and voltage stability issues. Grid connection of new generators can have significant impact on overall system performance and stability. This paper presents investigation of a wind farm transient stability under symmetrical three phase fault conditions...
Existence of inverter in Wind Park makes it a source of harmonics that can cause reducing power quality of network. This paper investigates losses due to harmonics produced by Wind Park on a network Using Particle swarm optimization. Preliminary results indicate that these losses are very small, but because of its expansion in all lines could reduce the power quality in entire network.
Existence of inverter in wind parks makes it a source of harmonics that can cause reducing power quality of network. This paper investigates losses due to harmonics produced by Wind Park on a network. Preliminary results indicate that these losses are very small, but because of its expansion in all lines could reduce the power quality of entire network.
The growing population has added a burden to the existing power generation station. So what if the demand by the people exceeds the generation capability. The consequence is power deficiency. The world has to remain in dark weighing down the economy of the country. The alternative solution for this is generation mix. Now a day's commercial building is increasing at a greater pace. So in addition to...
In this paper, renewable energy, microgrid, charging devices and other areas are discussed, using large-scale charging devices to eliminate the negative the impact of renewable energy to grid stability and power quality. Utilizing available resources to improve the stability of the grid, providing a reference for further research direction based Based on the study of predecessor. The simulation of...
The oil-immersed transformer is commonly used in modern electrical power systems, and it is also a crucial component in smart grids related to power efficiency and quality. Because of its complex electromagnetic characteristics, it is not viable to establish its thermal control model simply by conventional approaches, such as thermal balance, specific heat capacity and thermal field. In this paper,...
Environmental, economic and technical benefits of photovoltaic (PV) systems make them to be used in many countries. The main characteristic of PV systems is the fluctuations of their output power. Hence, high penetration of PV systems into electric network could be detrimental to overall system performance. Furthermore, the fluctuations in the output power of PV systems make it difficult to predict...
The share of energy produced by RES tends to increase during the last decade. New types of generators were introduced and the situation in terms of power system frequency control has changed. The modern wind turbines and PV inverters have functions for power output correction during significant frequency excursions. This contribution presents developed by the authors structure model of the electric...
This paper describes the technological centre for research of renewable resources and accumulation of electric power that forms a part of the scheme ENET - Energy Units for Utilization of Non-Traditional Energy Sources. The centre will operate several systems for production and accumulation of electric power. One of them is a pyrolyzing unit for generation of gas from solid waste materials, which...
In previous works, we have employed in both excitation and turbine governor systems a conventional coordinated exciter-governor stabilizer (EGPSS) and a coordinated fuzzy logic controller (FLCEG) for improving stability of a Single Machine Infinite-Bus power system (SMIB). This paper describes a new hybrid controller for superconducting machine, that we have denoted (FLC+PSS)EG, based on simultaneous...
This work introduces a comprehensive approach for the long term wind farm production analysis and forecast. Initially, a customized model overcomes the usually limited set of measurements by recreating a long, “virtual” history based on available climatological records. This local “virtual” history series is then analyzed and decomposed by associated “explaining” physical variables. These “explanations”...
Prison sites are a special type of public buildings or facilities in general that are overlooked by policy makers. The prison size and constant energy use results in excessive energy consumptions, which implies that a focus on such sites is necessary. Most authorities rather focus on the security aspects of prison estates than their energy efficiency, and this is transferred naturally to all members...
This paper presents a new configuration of doubly fed induction generator (DFIG)-based wind farm with multilevel cascaded H-bridge (CHB) converter and its control system, which is suitable not only for unbalanced grid voltage conditions, but also for small voltage sags. The proposed configuration of DFIG can balance the point of common coupling (PCC) voltage without needing additional DC link capacitor...
With the advent of Phasor Measurement Unit in Power System a new dimension has been given to power system monitoring and analysis. In this paper simulation of Nonrecursive and recursive DFT phasor estimation algorithm is done using Labview. The algorithm developed in Labview can be used for real time estimation of phasor by integrating with labview compliant data acquisition system like NI ELVIS kit.
This paper proposes an operation framework for incorporating time-varying electricity rates into day-ahead distribution system operation. The day-ahead distribution system operation problem is formulated as a mixed-integer linear programming (MILP) model, in which profit of the distribution system operator (DSO) from serving local loads is maximized. The impact of time-varying electricity rates on...
Flux Switching Permanent Magnet Machine (FSPM) is a new type of machine that due to their fault tolerant capability, high torque and power density and simple structure become a proper candidate for wind turbine power application which could easily satisfy the grid code requirements. In this paper a novel outer rotor configuration design of FSPM is proposed. The design procedure is carried out based...
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