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A nonlinear model of a flapping-wing micro aerial vehicle (MAV) is built in which the load acceleration and equivalent moment are formulated linearly in the body frame. The aerodynamic force and moment are not considered directly because the mass and moment of inertia of the flapping-wing MAV are too tiny. The visual measurement system (VMS) is taken to measure the flight data such as the position...
This work develops a technique to design a feedback stabilizing control law for an unstable autonomous switched system. This method is analyzed and then applied to the DCDC buck converter when considering the uncertainty of the parameters in the model. Based on this model, a control law is design to allow the output voltage track a reference voltage when the load is changed. The control objective...
Model of a 300MW thermal power unit's governing system of steam turbine was established to analyze its load fluctuation during main steam valve activity test. The model contains three sub-models. They are model of turbine's governor during main steam valve activity test, model of governing valve, model of steam turbine considering governing valve's discharge characteristic. Based on the established...
One of the biggest threats for the security of power grids are congestion of cross-border lines and congestion in the network itself as result of parallel flows. Nowadays, occurrence of congestion is a result of limited network transfer capacities as a direct consequence of increased power transactions. One of the reasons for cross-border congestions are the unreal cross-border capacities calculations...
During the last years, the number of distributed generators has grown significantly and it is expected to get higher in the future. Several new technologies are being developed for this type of generation (including microturbines, photovoltaic plants, wind turbines and electrical storage systems) and have to be integrated in the electrical grid. In this framework, active loads (i.e., shift-able demands...
This paper deals with the traffic signal control problem. More specifically it investigates the impact at a network level of simple dynamic local traffic control policies. A dynamic route swapping rule is adopted to model the behavioral response of the travellers to signal changes, while a dynamic signal control swapping rule based on an equi-pressure policy is used to implicitly consider the flow...
Modelling and simulation assist in decision support or planning activities by allowing efficient exploration of multiple scenarios in a situation where testing in a real setting is impractical. This exploration is often done by varying numerical parameters in the model such as physical dimensions or speed in order to find the optimal configuration. However, for certain problems, in order to find optimal...
Computing resource allocation in Baseband Unit (BBU) Pool is a challenging research topic for a Centralized Radio Access Network (C-RAN) when the resource allocation algorithm has to heed thermal characteristics of the computing resources (Processors) of BBU along with the optimization of power consumption and computing resource usage. Since the network load acts as a heat source for the processor...
Heterogeneous network (HetNet) has been widely accepted as a viable way to deal with the increasing traffic demand. However, the deployment of small cell base stations (SBSs) inevitably triggers a tremendous escalation of energy consumption. In this paper, we study the energy efficient HetNet deployment problem taking the disparities of the traffic load distribution into account. The optimization...
The complexity of transportation systems often dictates detailed representation of time-dependent demand and supply interaction through Dynamic Traffic Assignment (DTA). These complex models involve a large number of global parameters (behavior and congestion features) and main inputs (demand and supply characteristics) that require to be calibrated off-line, while stream of data coming from the field...
According to the Energy Policy of European Union, renewable energy sources (RES) should supply 80% of the total demand for electrical energy in the year 2050. Due to seasonal intermittency of these production technologies, large-scale penetration of energy storage can be expected. Power-to-Gas (PtG) technology offers a possibility for long-term storage of excess electricity, as well as other advantages...
Deployment mechanisms in Cloud environments are becoming more and more attractive to developers that find them easy and convenient to deploy their applications in just few steps. These mechanisms reduced the development cycles from weeks to hours. In this context, elasticity plays an important role in coping with the dynamic nature of these environments. Elasticity mechanisms allow adding or retrieving...
The modern Distribution Systems (DS) require for accurate and fast Power Flow (PF) algorithms as a basis for other DS applications. Almost all decisions are taken based on accurate PF results and, possibly, they have to be taken in real time. In this paper, a new PF algorithm based on a linear programming approach is proposed. The graph theory is used for modeling the distribution network with some...
The increased integration of distributed energy resources (DER), based mainly on renewable sources, imposes new challenges on the distribution system operation and planning. The recent developments in energy storage technologies provide opportunities to use them as distributed storage systems. This paper presents a framework to assess the investments in battery energy storage systems (BESS) for distribution...
In this study, it is proposed to carry out an efficient formulation in order to figure out the stochastic security-constrained generation capacity expansion planning (SC-GCEP) problem. The main idea is related to directly compute the line outage distribution factors (LODF) which could be applied to model the N — m post-contingency analysis. In addition, the post-contingency power flows are modeled...
Based on measured load data in high temporal resolution, the time-dependent load shifting potential of residential electricity customers can be assessed. This enables the simulation of their reaction to different variable retail electricity rates, and consequently the evaluation of the suitability of these rate structures for various applications. The focus is on time-of-use rates with two price levels,...
The aim of the paper is maximization the consumption of energy generated by RES in distribution system. It is achieved by aggregation of loads and power generating units to common internal grid called power park. In order to maximize consumption of renewable energy, the RES sizing optimization model is used. In order to reflect the intermittency of renewables, they are modelled by generation profiles...
Renewable energies are expected to be the main electricity generation source. However, the variability of renewable energy supply poses challenges to the generation expansion modelling as uncertainty of hourly generation need to be adequately taken into account. This paper analyzes the implications of different approaches to optimization under uncertainty, ranging from stochastic to robust optimization...
This paper presents a novel approach to determine both the exponential and ZIP load model parameters in electrical power system substations. The proposed approach aims to estimate the polynomial and exponential parameters for active and reactive power loads. Field measurements are obtained from a rigorous testing script to impose sustained voltage variations, and the parameters are estimated by using...
This paper develops a mathematical model for optimal capacitor placement and sizing in radial distribution systems. The optimization model finds placement and sizes of capacitors considering variations on load profiles with 15-minute resolution. A recently developed heuristic algorithm, Moth-flame Optimization Algorithm, is modified and used to solve the model. Optimization model is tested on a modified...
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