scholarly journals Implementation of SoC Based Real-Time Electromagnetic Transient Simulator

2017 ◽  
Vol 2017 ◽  
pp. 1-14 ◽  
Author(s):  
I. Herrera-Leandro ◽  
P. Moreno-Villalobos ◽  
S. Ortega-Cisneros ◽  
Jorge Rivera ◽  
F. Sandoval-Ibarra
Keyword(s):  
Power Systems ◽  
Real Time ◽  
High Performance ◽  
Design Stage ◽  
Solution Flow ◽  
Embedded Processor ◽  
Electromagnetic Transient ◽  
Protection Systems ◽  
Balanced Distribution ◽  
Two Sides

Real-time electromagnetic transient simulators are important tools in the design stage of new control and protection systems for power systems. Real-time simulators are used to test and stress new devices under similar conditions that the device will deal with in a real network with the purpose of finding errors and bugs in the design. The computation of an electromagnetic transient is complex and computationally demanding, due to features such as the speed of the phenomenon, the size of the network, and the presence of time variant and nonlinear elements in the network. In this work, the development of a SoC based real-time and also offline electromagnetic transient simulator is presented. In the design, the required performance is met from two sides, (a) using a technique to split the power system into smaller subsystems, which allows parallelizing the algorithm, and (b) with specialized and parallel hardware designed to boost the solution flow. The results of this work have shown that for the proposed case studies, based on a balanced distribution of the node of subsystems, the proposed approach has decreased the total simulation time by up to 99 times compared with the classical approach running on a single high performance 32-bit embedded processor ARM-Cortex A9.

scholarly journals DPsim—Advancements in Power Electronics Modelling Using Shifted Frequency Analysis and in Real-Time Simulation Capability by Parallelization

Energies ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3879
Author(s):  
Markus Mirz ◽  
Jan Dinkelbach ◽  
Antonello Monti
Keyword(s):  
Power Systems ◽  
Power Electronics ◽  
Real Time ◽  
Frequency Analysis ◽  
Transient Simulation ◽  
Real Time Simulation ◽  
Electromagnetic Transient ◽  
Dynamic Phasors ◽  
Time Simulation ◽  
Electromagnetic Transient Simulation

Real-time simulation is an increasingly popular tool for product development and research in power systems. However, commercial simulators are still quite exclusive due to their costs and they face problems in bridging the gap between two common types of power system simulation, conventional phasor based, and electromagnetic transient simulation. This work describes recent improvements to the open source real-time simulator DPsim to address increasingly important use cases that involve power electronics that are connected to the electrical grid and increasing grid sizes. New power electronic models have been developed and integrated into the DPsim simulator together with techniques to decouple the system solution, which facilitate parallelization. The results show that the dynamic phasors in DPsim, which result from shifted frequency analysis, allow the user to combine the characteristics of conventional phasor and electromagnetic transient simulation. Besides, simulation speed up techniques that are known from the electromagnetic domain and new techniques, specific to dynamic phasors, significantly improve the performance. It demonstrates the advantages of dynamic phasor simulation for future power systems and the applicability of this concept to large scale scenarios.

scholarly journals Factorisation Path Based Refactorisation for High-Performance LU Decomposition in Real-Time Power System Simulation

Energies ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7989
Author(s):  
Jan Dinkelbach ◽  
Lennart Schumacher ◽  
Lukas Razik ◽  
Andrea Benigni ◽  
Antonello Monti
Keyword(s):  
Power Systems ◽  
Real Time ◽  
Decomposition Method ◽  
High Performance ◽  
Computation Time ◽  
Lu Decomposition ◽  
Nonlinear Component ◽  
Time Requirements ◽  
Component Models ◽  
Real Time Simulations

The integration of renewable energy sources into modern power systems requires simulations with smaller step sizes, larger network models and the incorporation of complex nonlinear component models. These features make it more difficult to meet computation time requirements in real-time simulations and have motivated the development of high-performance LU decomposition methods. Since nonlinear component models cause numerical variations in the system matrix between simulation steps, this paper places a particular focus on the recomputation of LU decomposition, i.e., on the refactorisation step. The main contribution is the adoption of a factorisation path algorithm for partial refactorisation, which takes into account that only a subset of matrix entries change their values. The approach is integrated into the modern LU decomposition method NICSLU and benchmarked against the methods SuperLU and KLU. A performance analysis was carried out considering benchmark as well as real power systems. The results show the significant speedup of refactorisation computation times in use cases involving system matrices of different sizes, a variety of sparsity patterns and different ratios of numerically varying matrix entries. Consequently, the presented high-performance LU decomposition method can assist in meeting computation time requirements in real-time simulations of modern power systems.

scholarly journals Dynamic Frequency Support for Low Inertia Power Systems by Renewable Energy Hubs with Fast Active Power Regulation

Electronics ◽  
2021 ◽  
Vol 10 (14) ◽  
pp. 1651
Author(s):  
Jose Rueda Torres ◽  
Nidarshan Veera Kumar ◽  
Elyas Rakhshani ◽  
Zameer Ahmad ◽  
Ebrahim Adabi ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Power Systems ◽  
Real Time ◽  
Active Power ◽  
Solar Photovoltaic ◽  
Electromagnetic Transient ◽  
The North ◽  
Time Simulation ◽  
Power Regulation ◽  
Dynamic Frequency

This paper concerns the feasibility of Fast Active Power Regulation (FAPR) in renewable energy hubs. Selected state-of-the-art FAPR strategies are applied to various controllable devices within a hub, such as a solar photovoltaic (PV) farm and an electrolyzer acting as a responsive load. Among the selected strategies are droop-based FAPR, droop derivative-based FAPR, and virtual synchronous power (VSP)-based FAPR. The FAPR-supported hub is interconnected with a test transmission network, modeled and simulated in a real-time simulation electromagnetic transient (EMT) environment to study a futuristic operating condition of the high-voltage infrastructure covering the north of the Netherlands. The real-time EMT simulations show that the FAPR strategies (especially the VSP-based FAPR) can successfully help to significantly and promptly limit undesirable large instantaneous frequency deviations.

Real-Time High Jump Wearable Device with ESP8266 for High-Performance and Low-Injury

2018 ◽  
Vol 10 (3) ◽  
Author(s):  
Muhammad Faris Roslan ◽  
◽  
Afandi Ahmad ◽  
Abbes Amira ◽  
◽  
...  
Keyword(s):  
Real Time ◽  
High Performance ◽  
Wearable Device
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