NFORMATION SYSTEM OF THE TIME SCALE TRANSMISSION THROUGH AN INTEGRATED ELECTRICITY NETWORKS OF SMART TECHNOLOGIES

2019 ◽  
Author(s):  
Valerii Koval ◽  
Olexandеr Samkov ◽  
Оleg Piskun ◽  
Nikolai Medina
Keyword(s):  
Information System ◽  
Smart Grid ◽  
Power System ◽  
Time Scale ◽  
Continuous Monitoring ◽  
Service Providers ◽  
Ip Networks ◽  
Energy Profile ◽  
System Parameters ◽  
The Stability

The comparative analysis of the features of the existing and perspective technologies of providing timestamps of the process of continuous monitoring of the stability of power system parameters, according to the concept of smart grid (SMART Grid). A new IEEE-1588 synchronization mechanism is considered that is capable of providing accurate time stamping by packet switching technology that does not require a dedicated network. The experimental data of the results of the research of the equipment of Ukrainian production for transmitting the time scale of the "energy" profile using the RTR protocol are presented. For the technical implementation of the information system for the transmission of reference values ​​of the time scale with certain qualitative characteristics, it is necessary to analyze the features of existing and promising technologies to ensure timing of the process of continuous monitoring of the stability of power system parameters, according to the concept of smart grid (SMART Grid). It is appropriate to take into account the fact that, given the increasing demand for Internet service providers, telecommunications operators are actively developing packet switched asynchronous networks (IP networks) that can be used to reproduce the national time and frequency scale based on the modern RTD synchronization protocol ( Precision Time Protocol) [4] recommended by international standard IEC 61850-9. An important component of the preparation for the technical implementation of the information system is the experimental confirmation of the possibility of using equipment, including Ukrainian production for transmission over the current IP-networks timestamp with an accuracy of ± 1 microseconds, the use of which will create conditions for diversification of synchronization support and reduction of the accident in the intelligent electric power. Test results of a set of equipment of Ukrainian production showed that its basic characteristics meet the requirements of the "energy" profile of RTR and indicate that its technical and economic indicators correspond to the world level.

New Theories and Methods of Low Frequency Oscillation Analysis under Smart Grid Framework in Electrical Engineering

2013 ◽  
Vol 676 ◽  
pp. 186-192
Author(s):  
Zhi Jian Liu ◽  
Rong Huang ◽  
Shu Ming Zhou ◽  
Yu Cheng Hou
Keyword(s):  
Smart Grid ◽  
Power System ◽  
Electrical Engineering ◽  
Low Frequency ◽  
Frequency Oscillation ◽  
Low Frequency Oscillation ◽  
Oscillation Analysis ◽  
On Line ◽  
Visualization Technology ◽  
The Stability

The low-frequency oscillation is one of the most important reasons that affects the stability of the power system. Under the background of building a unified and strong smart grid, the scale of the power system will continue to expand, the interconnection of systems will be more closely, the structure will be more complex, these factors will further increase the difficulty on the low-frequency oscillation control. This paper summarizes the methods to analysis low frequency oscillation signal, the way that suppresses the low frequency oscillation in electrical engineering. Further, based on smart grid framework, a on-line visualization technology and a self-recovery regulation strategy are proposed to damp low-frequency oscillation.

scholarly journals Thyristor Controlled Series Capasitor Berbasis Adaptive Fuzzy Logic Controller Sebagai Percepatan Peredaman Osilasi Daya Pada Sistem Tenaga

2018 ◽  
Vol 2 (1) ◽  
pp. 37-41
Author(s):  
Dwi Agus Prabowo ◽  
Istiyo Winarno
Keyword(s):  
Power System ◽  
Fuzzy Logic Controller ◽  
Service Providers ◽  
Fuzzy Controller ◽  
System Stability ◽  
Main Concern ◽  
Adaptive Fuzzy Controller ◽  
Adaptive Fuzzy ◽  
The Stability ◽  
The Impact

The current population growth is very fast, so also the number of settlements more evenly, with this demand fulfillment demand for electricity is increasingly widespread and more, therebr making electric power generation service providers continue to strive to provide uniform and stable electrical energy. On the other hand there is an impact due to the many loads on the network electricity that can not be estimated its use, rise and fall of the load, therefore the power system stability must be maintained, this makes the stability of the power system the main concern in a operating. Without good dampening the disturbance will be isolated in the system and out of the stability area, so it can lead to worse effects such as total blackout. Thyristor Controlled Series Capacitor (TCSC) is a device that can be used to regulate power inmadance of power system. TCSC has three main components such as inductor, capacitor, and thyristor. The way TCSC works is by setting the angle of ignition, here the adaptive fuzzy controller is used as the best alpha-viewer the system needs. From the comparison simulation, the difference of fuzzy controller with adaptive fuzzy with fuzzy controller can reduce oscillation at 0.68 second average time and with fuzzy oscillation adaptive controller that can be muffled at 0.56 seconds, with this adaptive fuzzy controller capable damping oscillations 0.12 seconds faster in comparison with fuzzy controllers. So with this oscillation damping can reduce the impact of isolated disturbances in the system.

Research on the framework of future smart grid information system

2014 ◽  
Author(s):  
Dongliang Zhang ◽  
Li Shang ◽  
Yu Fang ◽  
Changjun Jiang
Keyword(s):  
Information System ◽  
Smart Grid

scholarly journals Impact of the Generation System Parameters on the Frequency Response of the Power System: A UK Grid Case Study

Electricity ◽  
2021 ◽  
Vol 2 (2) ◽  
pp. 143-157
Author(s):  
Jovi Atkinson ◽  
Ibrahim M. Albayati
Keyword(s):  
Power System ◽  
Frequency Response ◽  
Power Grid ◽  
Sudden Increase ◽  
Generation System ◽  
System Parameters ◽  
Primary Frequency ◽  
Primary Frequency Response ◽  
The Impact ◽  
System Inertia

The operation and the development of power system networks introduce new types of stability problems. The effect of the power generation and consumption on the frequency of the power system can be described as a demand/generation imbalance resulting from a sudden increase/decrease in the demand and/or generation. This paper investigates the impact of a loss of generation on the transient behaviour of the power grid frequency. A simplified power system model is proposed to examine the impact of change of the main generation system parameters (system inertia, governor droop setting, load damping constant, and the high-pressure steam turbine power fraction), on the primary frequency response in responding to the disturbance of a 1.32 GW generation loss on the UK power grid. Various rates of primary frequency responses are simulated via adjusting system parameters of the synchronous generators to enable the controlled generators providing a fast-reliable primary frequency response within 10 s after a loss of generation. It is concluded that a generation system inertia and a governor droop setting are the most dominant parameters that effect the system frequency response after a loss of generation. Therefore, for different levels of generation loss, the recovery rate will be dependent on the changes of the governor droop setting values. The proposed model offers a fundamental basis for a further investigation to be carried on how a power system will react during a secondary frequency response.

scholarly journals Towards automated engineering and validation of cyber-physical energy systems

2019 ◽  
Vol 2 (S1) ◽  
Author(s):  
Filip Pröstl Andrén ◽  
Thomas I. Strasser ◽  
Jürgen Resch ◽  
Bernhard Schuiki ◽  
Sebastian Schöndorfer ◽  
...  
Keyword(s):  
Smart Grid ◽  
Power System ◽  
Electric Power System ◽  
Paradigm Change ◽  
Engineering Process ◽  
Distributed Generators ◽  
Physical Energy ◽  
Engineering Costs ◽  
Information And Communication ◽  
Grid Applications

Abstract The massive deployment of distributed generators from renewable sources in recent years has led to a fundamental paradigm change in terms of planning and operation of the electric power system. The usage of advanced automation and information and communication technology is a key element to handle these new challenges and to turn the traditional power system into a smart grid. The implementation of such complex systems solutions is associated with increasing development complexity resulting in increased engineering costs. The traditional engineering methods used for power system automation were not intended to be used for applications of this scale and complexity. However, the usage of proper methods, automation architectures, and corresponding tools holds huge optimization potential for the engineering process. Therefore, this work presents a model-based engineering and validation support system, covering the overall engineering process for smart grid applications.

scholarly journals The frequency of Kozai–Lidov disc oscillation driven giant outbursts in Be/X-ray binaries

2019 ◽  
Vol 489 (2) ◽  
pp. 1797-1804 ◽  
Author(s):  
Rebecca G Martin ◽  
Alessia Franchini
Keyword(s):  
Orbital Period ◽  
Time Scale ◽  
Orbital Plane ◽  
Material Flows ◽  
X Ray ◽  
System Parameters ◽  
Be Star ◽  
Chaotic Nature ◽  
X Ray Binaries ◽  
Good Agreement

ABSTRACT Giant outbursts of Be/X-ray binaries may occur when a Be-star disc undergoes strong eccentricity growth due to the Kozai–Lidov (KL) mechanism. The KL effect acts on a disc that is highly inclined to the binary orbital plane provided that the disc aspect ratio is sufficiently small. The eccentric disc overflows its Roche lobe and material flows from the Be star disc over to the companion neutron star causing X-ray activity. With N-body simulations and steady state decretion disc models we explore system parameters for which a disc in the Be/X-ray binary 4U 0115+634 is KL unstable and the resulting time-scale for the oscillations. We find good agreement between predictions of the model and the observed giant outburst time-scale provided that the disc is not completely destroyed by the outburst. This allows the outer disc to be replenished between outbursts and a sufficiently short KL oscillation time-scale. An initially eccentric disc has a shorter KL oscillation time-scale compared to an initially circular orbit disc. We suggest that the chaotic nature of the outbursts is caused by the sensitivity of the mechanism to the distribution of material within the disc. The outbursts continue provided that the Be star supplies material that is sufficiently misaligned to the binary orbital plane. We generalize our results to Be/X-ray binaries with varying orbital period and find that if the Be star disc is flared, it is more likely to be unstable to KL oscillations in a smaller orbital period binary, in agreement with observations.

scholarly journals Architectural and functional classification of smart grid solutions

2019 ◽  
Vol 2 (S1) ◽  
Author(s):  
Friederike Wenderoth ◽  
Elisabeth Drayer ◽  
Robert Schmoll ◽  
Michael Niedermeier ◽  
Martin Braun
Keyword(s):  
Smart Grid ◽  
Power Systems ◽  
Power System ◽  
Power Distribution ◽  
Hierarchical Architecture ◽  
Distribution Grid ◽  
Active System ◽  
System Operation ◽  
Power System Operation

Abstract Historically, the power distribution grid was a passive system with limited control capabilities. Due to its increasing digitalization, this paradigm has shifted: the passive architecture of the power system itself, which includes cables, lines, and transformers, is extended by a communication infrastructure to become an active distribution grid. This transformation to an active system results from control capabilities that combine the communication and the physical components of the grid. It aims at optimizing, securing, enhancing, or facilitating the power system operation. The combination of power system, communication, and control capabilities is also referred to as a “smart grid”. A multitude of different architectures exist to realize such integrated systems. They are often labeled with descriptive terms such as “distributed,” “decentralized,” “local,” or “central." However, the actual meaning of these terms varies considerably within the research community.This paper illustrates the conflicting uses of prominent classification terms for the description of smart grid architectures. One source of this inconsistency is that the development of such interconnected systems is not only in the hands of classic power engineering but requires input from neighboring research disciplines such as control theory and automation, information and telecommunication technology, and electronics. This impedes a clear classification of smart grid solutions. Furthermore, this paper proposes a set of well-defined operation architectures specialized for use in power systems. Based on these architectures, this paper defines clear classifiers for the assessment of smart grid solutions. This allows the structural classification and comparison between different smart grid solutions and promotes a mutual understanding between the research disciplines. This paper presents revised parts of Chapters 4.2 and 5.2 of the dissertation of Drayer (Resilient Operation of Distribution Grids with Distributed-Hierarchical Architecture. Energy Management and Power System Operation, vol. 6, 2018).

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