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Terceira island has a great potential for geothermal energy, which can contribute to increase the penetration of renewable energies in the generation mix. But as a small size island grid, several technical issues can appear. This paper models the power system in Terceira island before the installation of any new renewable power plant. Thus, the steady-state and dynamic performance of the power system...
This paper (i) discusses a detailed dynamical model of wind turbine systems (WTS) with doubly-fed induction generator (DFIG), (ii) introduces a dynamic power flow of WTS with wind as input power and electrical power at the point of common coupling (PCC) as output power and (iii) defines an instantaneous efficiency factor. System model, dynamic power flow and instantaneous efficiency factor are nonlinear...
When alternative power sources are connected to the utility grid the core characteristics of the system are changed. This fact is especially true for intermittent, volatile power sources such as photovoltaic (PV) systems. In recent years, PV power systems have become increasingly cost competitive leading to greater penetrations of both large and small scale PV systems. The large scale integration...
This paper presents a real-time integrated model of a micro-grid to simulate its electrical energy infrastructure. This infrastructure includes two PV arrays, a fuel cell, and a diesel generator that support building loads when islanded from the utility grid. The paper reviews existing models, which are usually available either as 1) low-level dynamic models, along with power electronics for specific...
Reproducing complex networks with features of real-life networks is exciting and challenging at the same time. Based on the popular Omnet++ discrete event simulator, we introduce Armonia, a framework for modeling massive networks and their dynamic interactions. It includes a collection of topology generators, a set of resource placement and replication modules, a component for specifying resource...
Reproducing complex networks with features of real-life networks is exciting and challenging at the same time. Based on the popular Omnet++ discrete event simulator, we introduce Armonia, a framework for modeling massive networks and their dynamic interactions. It includes a collection of topology generators, a set of resource placement and replication modules, a component for specifying resource...
State estimation, at the center of the energy management system, is an important requirement for system monitoring. It leads to better control and stability of electric power system. Accurate state estimation at faster rate is a backbone for reliable operation of vastly complex electric power system. Phasor measurement unit based measurement system makes it feasible to feed measurement data to state...
This research paper employs static and dynamic studies under different case studies in order to define the potential impact of the integration of two PV power plants in a distribution network. The selected power system represents the electric infrastructure of Al Akhawayn University in Ifrane, Morocco. This work focuses on the impact may induce any distributed units' addition on the power system's...
This paper examines the impact of a Capacitive Energy Storage (CES) unit to enhance the dynamic performance of isolated wind diesel hybrid power system under different operating conditions. Wind Diesel Hybrid System (WDHS) obtains maximum contribution from wind and rest from diesel generator. This system is useful in rural or island areas. The irregular power generation as well as intermittent load...
In bulk power systems, spectral analysis of poorly damped modes is commonly used for identifying local and inter-area oscillations. Conventionally, these oscillations are mitigated by carefully tuned decentralized controllers. In this paper, we depart from the modal perspective and employ non-modal tools to analyze and control inter-area oscillations. Our input-output analysis examines power spectral...
In this paper, we present the design of a new type of fuzzy controllers to enhance the transient stability and achieve voltage regulation of multimachine power system subject to persistent disturbance by incorporating sliding mode control theory with fuzzy control technology. First, a fuzzy model of the given nonlinear system is constructed to represent the local dynamic behaviors of the given nonlinear...
Coherent identification is a key step in dynamic equivalence based on coherency for reduction large power systems. An algorithm named modified PSO-FCM (MPSO-FCM), which the fuzzy c-means clustering (FCM) bases on modified particle swarm optimization (MPSO), is presented to solve the problem of identifying coherent generators. For the purpose to improve convergence performance, convergence factor and...
The paper presents a study for the impacts of solar energy integration on the power system dynamic stability. A detailed photovoltaic model incorporated active and reactive power controller is used to investigate the effect of replacement of conventional steam power station by solar system considering changing in size and location. The controller depends on decoupled inner d-q current control loops...
With the rapid development of both the size and intricacy of the power system, power system is gradually approaching its operating limit. System islanding is usually considered as the ultimate control action to preserve as many stable areas as possible. The islanding strategy plays an important role in the power system restoration as it determines whether the islands can make safe and steady operation...
While cyber-physical systems are widely deployed and known to be difficult to analyze due to their increasing complexity, the number of sophisticated attacks against them have been constantly growing. This necessitates semi-automated intrusion response and recovery capabilities for timely termination of ongoing attacks and effective recovery of the infrastructural normal and safe operations. In this...
The interdependency of physical dynamics and communications is of key importance in cyber physical systems (CPSs). Entropy is used to measure the uncertainty of a physical system and determine the communication requirement for monitoring the system. The evolution of entropy in time and space is described using ordinary differential equations (ODEs) and partial differential equations (PDEs), whose...
Inter-connectors are strategically important elements in the power system for their role in bulk power transfer between different areas. The dynamic performance of the interconnector is relatively less certain due to modelling complexity and difficulty in testing, despite its importance to power system security. This paper firstly presents the calibration result of the small signal power system dynamic...
The proposed improved bees algorithm (IBA) finds a trustworthy solution to the dynamic economic dispatch (DED) problem considering the prohibited operating zones. Additional techniques such as constraint handling, adaptive patch size, and limited search space are integrated with general bees algorithm, making significant improvement in the overall performance of the proposed technique. The DED problem...
Electromechanical wave propagation characterizes the first-swing dynamic response in a spatially delayed manner. This paper investigates the characteristics of this phenomenon in two-dimensional and one-dimensional power systems. In 2-D systems, the wave front expands as a ripple in a pond. In 1-D systems, the wave front is more concentrated, retains most of its magnitude, and travels like a pulse...
With the increasing amount of wind power in the generation mix it is evident that the influence of wind power on the power system dynamics is going to be significant in the near future. This has necessitated the requirement to provide simple and accurate fundamental frequency models for the wind turbines, to be used in bulk power system dynamic studies. This paper presents the work done on modeling...
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