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With the increasing penetration of renewable energy generations such as solar and wind power, negative impacts of the large-scale integration of renewable energy on the bulk grid cannot be ignored. Thus, grid integration testing of inverter-coupled renewable energy is essential. For this reason, a high power gird simulator capable of emulating various types of realistic grid conditions is needed for...
This paper proposes a new high-voltage Pulse Generator (PG), fed from low voltage dc supply Vs. This input supply voltage is utilized to charge two arms of N series-connected modular multilevel converter sub-module capacitors sequentially through a resistive-inductive branch, such that each arm is charged to NVS. With a step-up nano-crystalline transformer of n turns ratio, the proposed PG is able...
This paper presents the design, construction, and testing of a double-sided, dual airgap linear Vernier generator for wave energy conversion. Both the electromagnetic as well as mechanical design concepts are explored with a particular emphasis on the mechanical aspect given the fact that maintaining a dual airgap for this topology is challenging and has not been previously implemented.
Undeniably, the focus of several works revolved around finding a process of unification to follow along the modeling of mechatronic systems. This paper is a part of a general research designed to apply topology for the modeling of complex mechatronic systems. Notably, a topological approach to model a Wind Turbine is adopted in this study. The Wind Turbine model under study is modeled using a topological...
The more electric aircraft concept is pushing towards a DC distribution system for the on-board electrical appliances. In the scenario where multiple high-voltage and low-voltage buses are present, a power electronics converter interface is mandatory. In order to implement a resilient distribution system, the power exchange between different buses is envisaged, to ensure that a failure in a supply...
This paper presents a comprehensive overview of power converters and their control techniques for AC microgrids. The aim is to give an insight and direction for researchers and applications on promising topologies, control, and application within future smart grid. The paper first focuses on presenting various power converter topologies used in AC microgrids. Then, suitable control techniques for...
This paper considers a framework of electrical cyber-physical systems (ECPSs) in which each bus and branch in a power grid is equipped with a controller and a sensor. By means of measuring the damages of cyber attacks in terms of cutting off transmission lines, three solution approaches are proposed to assess and deal with the damages caused by faults or cyber attacks. Splitting incident is treated...
This paper discusses high-voltage, high-speed permanent magnet generators and their possible applications: space and aviation aircrafts, ships, mobile installations, etc. The main qualitative criteria for the electrical machinery power supply systems for spacecraft are determined. Different design topologies of the high-voltage, high-speed permanent magnet generators are reviewed and the optimal option...
Low voltage high power wind energy conversion system (WECS) requires heavy cables and large step-up grid interfacing transformers. In recent years, power and voltage rating of offshore wind turbines have already reached 10MW and 10kV respectively, and medium voltage converters have become strongly demanded. Some scholars proposed a cascaded multilevel converter based on dual active bridge (DAB) to...
This paper deals with design, simulations and comparison of various bipolar Marx topologies. Output voltage pulse specifications are 10 kV, % voltage droop − 10%, PRF − 1kHz and pulse width of 5μsec. The features of inductive charging and charging through input switch is analyzed. Bipolar Marx generator with six switches, five switches and four switch topologies are designed and simulated. These solid-state...
Consensus based distributed robust adaptive finite-time secondary voltage control is designed for inverter-based islanded AC microgrids. The design combines decentralized local states information with the states of the neighboring distributed generators with directed communication topology. Robust control algorithms are used locally for each distributed generator to deal with uncertainty. Lyapunov...
This paper proposes a mixed-integer quadratic programming (MIQP) model for optimal day-ahead distribution networks dispatch considering Wind Generators (WGs) and topology reconfiguration. Firstly, linearized current injection model is introduced for generators by a series of approximations. Then the day-ahead Switching Operations (SOs) of reconfiguration could be calculated in a linear form based...
The economic operation of islanding microgrids is getting more and more attention. In view of the problems of information burden and high cost of communication, poor expansion in the centralized control, a fully distributed optimization method for the economic operation of islanding microgrids is proposed. The proposed method is decentralized based on the Gossip algorithm, in which only through exchanging...
More than 80% of the 1.2 billion individuals without electricity live in rural regions of developing countries. For many of these communities, electricity access through the traditional paradigm of power infrastructure growth, increasing generation capacity of centralized grids and installing capital intensive transmission lines, substations, and distribution lines, will be financially infeasible...
In order to make better use of the existing transmission system, different approaches can be adopted. Previous research shows that both topology control and flexible AC transmission systems (FACTS) can enhance the transfer capability over the existing transmission network and reduce congestion costs. In previous studies, potential cost savings from performing line switching and utilizing FACTS control...
In this paper, we aim to investigate the output group consensus problem for a switching network of heterogeneous linear systems such that outputs of the agents synchronize with each other in every cluster. From the internal model principle perspective, a necessary condition is first derived in terms of the system dynamics. With this necessary condition, a dynamic controller is then designed to solve...
Low-Density-Parity-Check (LDPC) codes have gained popularity in communication systems and standards due to their capacity-approaching error-correction performance. In this paper, we first expose the tradeoff between decoding performance and hardware performance across three LDPC hard-decision decoding algorithms: Gallager B (GaB), Gradient Descent Bit Flipping (GDBF), and Probabilistic Gradient Descent...
This work presents the development and evaluation of a new scheme based on Artificial Neural Network (ANN) for fault detection and fault location in distribution systems with distributed generator. Two different ANNs are used, where the first one is able to detect which part of the distribution system the fault occurred and the second one is able to precisely locate the fault along the faulty line...
The plug-and-play function is one of the features of future smart grid. Distributed economic dispatch algorithm will pave the way for the achievement of this function. Most existing distributed economic dispatch algorithms only achieve asymptotic or exponential convergence and work under time-invariant communication topology. In this work, a consensus based distributed economic dispatch algorithm,...
The transient response of power grids to external disturbances influences their stable operation. This paper studies the effect of topology in linear time-invariant dynamics of different power grids. For a variety of objective functions, a unified framework based on H2 norm is presented to analyze the robustness to ambient fluctuations. Such objectives include loss reduction, weighted consensus of...
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