Study of control strategies of power electronics during faults in microgrids

Purpose – The purpose of this paper is to deal with the design of passive filter for power electronics voltage inverters used in aircraft electrical drives (a permanent magnet synchronous machine fed by a six-phase voltage inverter with PMW control), using optimization for both sizing and sensibility analyses. Design/methodology/approach – The approach is generic. An aid allows to modify easily the frequency model and so to check various study cases, and to carry out the filter optimization for different topologies or control strategies. Findings – The approach is generic. An aid allows to modify easily the frequency model and so to check various study cases, and to carry out the filter optimization for different topologies or control strategies. Research limitations/implications – The power electronics load is supposed to be a set of predefined harmonic sources, obtained by experiment or time simulation plus fast fourier transformation before the optimization process. Practical implications – The problem has numerous constraints on the components, mainly technological constraints. The volume is minimized, respecting electromagnetic standards and an electro magnetic interference filter prototype has been made. Originality/value – The frequency model is automatically generated. A complex aircraft application has been studied thanks to the approach. Several sensibility analyses have been carried out. An EMC filter has been sized and an experimental prototype has been made, comforting the sizing by optimization.

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An Iterative Refining Approach to Design the Control of Wave Energy Converters with Numerical Modeling and Scaled HIL Testing

Energies ◽

10.3390/en13102508 ◽

2020 ◽

Vol 13 (10) ◽

pp. 2508

Author(s):

Nicola Delmonte ◽

Eider Robles ◽

Paolo Cova ◽

Francesco Giuliani ◽

François Xavier Faÿ ◽

...

Keyword(s):

Power Electronics ◽

Wave Energy ◽

Control Strategies ◽

Low Cost ◽

Design Stage ◽

Control Laws ◽

General Validity ◽

Early Design Stage ◽

Wave Flume ◽

And Control

The aim of this work is to show that a significant increase of the efficiency of a Wave Energy Converter (WEC) can be achieved already at an early design stage, through the choice of a turbine and control regulation, by means of an accurate Wave-to-Wire (W2W) modeling that couples the hydrodynamic response calibrated in a wave flume to a Hardware-In-the-Loop (HIL) test bench with sizes and rates not matching those of the system under development. Information on this procedure is relevant to save time, because the acquisition, the installation, and the setup of a test rig are not quick and easy. Moreover, power electronics and electric machines to emulate turbines and electric generators matching the real systems are not low-cost equipment. The use of HIL is important in the development of WECs also because it allows the carrying out of tests in a controlled environment, and this is again time- and money-saving if compared to tests done on a real system installed at the sea. Furthermore, W2W modeling can be applied to several Power Take-Off (PTO) configurations to experiment different control strategies. The method here proposed, concerning a specific HIL for testing power electronics and control laws for a specific WECs, may have a more general validity.

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Didatic Platform For Power Electronics Control Strategies Fast Evaluation And Test

Eletrônica de Potência ◽

10.18618/rep.2008.2.099108 ◽

2008 ◽

Vol 13 (2) ◽

pp. 99-108

Author(s):

Edson Adriano Vendrusculo ◽

André Augusto Ferreira ◽

José Antenor Pomilio

Keyword(s):

Power Electronics ◽

Control Strategies ◽

Fast Evaluation

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Comprehensive Review on Solar, Wind and Hybrid Wind-PV Water Pumping Systems-An Electrical Engineering Perspective

CPSS Transactions on Power Electronics and Applications ◽

10.24295/cpsstpea.2021.00001 ◽

2021 ◽

Vol 6 (1) ◽

pp. 1-19

Author(s):

Sachin Angadi ◽

Keyword(s):

Power Electronics ◽

Life Cycle Cost ◽

Fossil Fuels ◽

Control Strategies ◽

Ghg Emissions ◽

Solar Photovoltaic ◽

Solar Pv ◽

Water Pumping ◽

Multi Stage ◽

Ac Motor

In India, the demand for water is continuously increasing due to the growing population. Approximately 16.5% of all country’s electricity used to pump this water is from fossil fuels leading to increased pump Life Cycle Cost (LCC) and Green House Gas (GHG) emissions. With the recent advancement in power electronics and drives, renewables like solar photovoltaic and wind energy are becoming readily available for water pumping applications resulting in the reduction of GHG emissions. Recently, research towards AC motor based Water Pumping Systems (WPS) has received a great emphasis owing to its numerous merits. Further, considering the tremendous acceptance of renewable sources, especially solar and wind, this paper provides a detailed review of single-stage and multi-stage WPS consisting of renewable source powered AC motors. The critical review is performed based on the following figure of merits, including the type of motor, power electronics interface and associated control strategies. Also, to add to the reliability of solar PV WPS, hybrid Wind-PV WPS will be discussed in detail. Readers will be presented with the state-of-the-art technology and research directions in Renewable Energy-based WPS (REWPS) to improve the overall system efficiency and hence reduce the payback period.

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Investigation on Control Strategies for a Single-Phase Photovoltaic Inverter Using PSCAD/EMTDC Software

Power Electronics and Drives ◽

10.2478/pead-2021-0006 ◽

2021 ◽

Vol 6 (1) ◽

pp. 75-99

Author(s):

Cristiano Luiz Henz ◽

Fabiano Perin Gasparin

Keyword(s):

Power System ◽

Power Electronics ◽

Control Strategy ◽

Single Phase ◽

Reactive Power ◽

Control Strategies ◽

Simulation Software ◽

Photovoltaic Systems ◽

Electromagnetic Transient ◽

Q Theory

Abstract In the last decades, electric power produced through photovoltaic conversion has been increasing because of the need to reduce fossil fuel burning. Recently, photovoltaic systems have become more competitive and their role in the renewable energies market share is steadily gaining in importance. Improvements in the power electronics employed in the DC/AC conversion are topics of interest in the quest for more efficient and eventually reduced-cost inverters. The goal of this paper is to perform an investigation of control strategies and propose a topology for a single-phase DC/AC converter for photovoltaic arrays using the simulation software Power System Computer Aided Design/ Electromagnetic Transient Design and Control (PSCAD/EMTDC). The circuit proposed in this paper employs an isolating transformer to a grid-connected photovoltaic inverter. The control strategy proposed uses the instantaneous reactive power theory (p–q theory) and phase-locked loop (PLL). The p-q theory uses two virtual axes in the Park Transformation, which provide to the control system a good dynamic response, accuracy, and decoupling between the control and power system. Computer simulations using the electromagnetic transient software PSCAD show the efficiency of the proposed strategy for a single-phase inverter. The control strategy and topology are quite simple and easy to implement in the future using a Digital Signal Processor (DSP). The results provide insights into new power electronics solutions, which can improve the efficiency and efficacy of the current available in DC/AC converters for photovoltaic systems.

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Energy Space Modeling of Power Electronics in Local Area Power Networks

Advances in Power Electronics ◽

10.1155/2012/837602 ◽

2012 ◽

Vol 2012 ◽

pp. 1-10

Author(s):

Gregory M. Vosters ◽

Wayne W. Weaver

Keyword(s):

Power Electronics ◽

Control Strategies ◽

Local Area ◽

Energy Utilization ◽

State Variables ◽

Level Control ◽

Power Networks ◽

Change Of Variables ◽

Space Modeling ◽

High Level

Power electronics are a core enabling technology for local area power networks and microgrids for renewable energy, telecom, data centers, and many other applications. Unfortunately, the modeling, simulation, and control of power electronics in these systems are complicated when using traditional converter models in conjunction with the network nodal equations. This work proposes a change of variables for the power electronic converter models from traditional voltage and currents to input conductance and stored energy. From this change of state, a universal point of load converter model can be utilized in the network nodal equations irrespective of the topology of the converter. The only impact the original converter topology has on the new model is the bounds on the control and state variables, and the mapping back to the switching or duty cycle controls. The proposed approach greatly simplifies the modeling of local area power networks and microgrids. This simpler model can be used to study stability and energy utilization and develop high-level control strategies that were not previously feasible.

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