Search query: computationally efficient simulation of power

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abstract: A computationally efficient simulation framework is set forth in which the semiconductor devices are represented by the physical phenomena relevant to the accurate prediction of high frequency circuit level transients and energy losses. Key elements of this framework include an encapsulated diode model and a method of coupling device models with those of external circuit elements given a user specified SPICE like netlist. The framework is applied to a single phase full bridge diode rectifier circuit with a discussion on time step requirements and overall computational performance. Comparisons between simulated and measured waveforms are also provided revealing excellent agreement.
author_names: Anand S Subbiah

Oleg Wasynczuk
title: Computationally Efficient Simulation of High Frequency Transients in Power Electronic Circuits
venue: IEEE Transactions on Power Electronics
year: 2016

abstract: This paper proposes a computationally efficient electricity market simulation tool (MST) suitable for future grid scenario analysis. The market model is based on a unit commitment (UC) problem and takes into account the uptake of emerging technologies, like demand response, battery storage, concentrated solar thermal generation, and HVDC transmission. To allow for a subsequent stability assessment, the MST requires an explicit representation of the number of online generation units, which affects power system inertia and reactive power support capability. These requirements render a full fledged UC model computationally intractable, so we propose unit clustering, a rolling horizon approach, and constraint clipping to increase the computational efficiency. To showcase the capability of the proposed tool, we use a simplified model of the Australian National Electricity Market with different penetrations of renewable generation. The results are verified by a comparison to a more expressive and computationally intensive binary UC, which confirm the validity of the approach for long term future grid studies.
author_names: Shariq Riaz

Gregor Verbic

Archie C Chapman
title: Computationally Efficient Market Simulation Tool for Future Grid Scenario Analysis
venue: IEEE Transactions on Smart Grid
year: 2019

abstract: Model predictive direct power control (MP DPC) is considered as a convenient control approach for grid connected inverters, as it eliminates the need for internal control loops and external modulators. In this paper, a computationally efficient MP DPC scheme is presented, which overcomes the main drawback of the traditional scheme by reducing the calculation burden. Based on the values of the reference and actual power, the reference voltage vector of the inverter can be calculated. By locating this reference voltage vector in the \alpha \beta$ reference frame, only three iterations are required. Hence, the cost function is optimized with a reduced calculation load. The dynamic behavior of the computationally efficient MP DPC, traditional MP DPC, and lookup table direct power control (LT DPC) for grid connected photovoltaic inverters is compared by simulation results. Furthermore, a novel online inductance estimation technique is proposed to enhance the robustness of the control scheme against any inductance variation.
author_names: Issa Hammoud

Khaled A Morsy

Mohamed Abdelrahem

Ralph Kennel
title: Computationally Efficient Model Predictive Direct Power Control with Online Finite Set Model Inductance Estimation Technique for Grid Connected Photovoltaic Inverters
venue: 2019 IEEE International Symposium on Predictive Control of Electrical Drives and Power Electronics (PRECEDE)
year: 2019

abstract: Wound field synchronous motors (WFSMs) fed by load commutated inverters (LCIs) are widely used for high power applications in many fields like ship propulsion, oil and gas industry, and pumped storage hydropower generation. Several design architectures exist for LCI drives, depending on the number of LCIs and their dc link connection as well as on the number of WFSM phase count. The prediction of LCI drive performance at steady state is important in the design stage, especially in regard to the prediction of the torque pulsations, which can give rise to serious mechanical resonance issues. This paper proposes an algebraic method to simulate the steady state behavior of LCI drives in all their configurations of practical interest. Compared to conventional dynamic simulation approaches based on differential equation solution, the method is much more computationally efficient and requires a very limited knowledge of system parameters. Its accuracy is experimentally assessed by comparison against measurements taken on a real LCI drive arranged according to various possible schemes. Furthermore, the advantages of the proposed algebraic method over the dynamic simulations are highlighted by comparison against the simulation results on a high power LCI fed WFSM drive in MATLAB/Simulink environment.
author_names: Sobhan Mohamadian

Alberto Tessarolo

Simone Castellan

Abbas Shoulaie
title: Steady State Simulation of LCI Fed Synchronous Motor Drives Through a Computationally Efficient Algebraic Method
venue: IEEE Transactions on Power Electronics
year: 2017

abstract: Power system security assessment methods require large dataset of operating points to train or test their performance. As historical data often contain limited number of abnormal situations, simulation data are necessary to accurately determine the security boundary. Generating such a database is an extremely demanding task, which becomes intractable even for small system sizes. This paper proposes a modular and highly scalable algorithm for computationally efficient database generation. Using convex relaxation techniques and complex network theory, we discard large infeasible regions and drastically reduce the search space. We explore the remaining space by a highly parallelizable algorithm and substantially decrease computation time. Our method accommodates numerous definitions of power system security. Here we focus on the combination of N k security and small signal stability. Demonstrating our algorithm on IEEE 14 bus and NESTA 162 bus systems, we show how it outperforms existing approaches requiring less than 10% of the time other methods require.
author_names: Florian Thams

Andreas Venzke

Robert Eriksson

Spyros Chatzivasileiadis
title: Efficient Database Generation for Data Driven Security Assessment of Power Systems
venue: IEEE Transactions on Power Systems
year: 2020

abstract: This paper presents a computationally efficient compressive sampling system for photoplethysmogram (PPG) signals. The approach relies on the exploration of the Discrete Cosine Transform (DCT) as sparsifying basis for reconstruction of randomly sampled signals, along with an overlapped window reconstruction algorithm which improves reconstruction accuracy of shorter windows, without sacrificing reconstruction accuracy. Simulation results demonstrate a reduction in CPU execution time by a factor of 2.4 without degradation of reconstruction accuracy compared to a traditional longer window reconstruction approach. This facilitates computationally efficient, low latency signal reconstruction.
author_names: Venkata Rajesh Pamula

Marian Verhelst

Chris Van Hoof

Refet Firat Yazicioglu
title: Computationally efficient compressive sampling for low power pulseoximeter system
venue: 2014 IEEE Biomedical Circuits and Systems Conference (BioCAS) Proceedings
year: 2014

abstract: In 3D system design, effective thermal cooling for high power density 3D stacked ICs is a crucial bottleneck. In this paper, efficient thermal simulation with micro channel fluidic cooling and air convection boundary condition is presented. By employing the analytical model for micro fluidic cooling, the fluid flow rate can be efficiently optimized to achieve target chip temperatures. Results demonstrating the efficiency and scalability of the method have been presented. In particular, the algorithm shows good capability of analyzing 3D stacking of chips with more than 20 micro channels and hundreds of TSVs.
author_names: Jianyong Xie

Madhavan Swaminathan
title: Computationally efficient thermal simulation with micro fluidic cooling for 3D integration
venue: 2011 IEEE Electrical Design of Advanced Packaging and Systems Symposium (EDAPS)
year: 2011

abstract: Cognitive Radio (CR) systems have been proposed to increase the spectrum utilization by opportunistically access the unused spectrum. Multicarrier communication systems are promising candidates for CR systems. Due to its high spectral efficiency, filter bank multicarrier (FBMC) can be considered as an alternative to conventional orthogonal frequency division multiplexing (OFDM) for transmission over the CR networks. This paper addresses the problem of resource allocation in multicarrier based CR networks. The objective is to maximize the downlink capacity of the network under both total power and interference introduced to the primary users (PUs) constraints. The optimal solution has high computational complexity which makes it unsuitable for practical applications and hence a low complexity suboptimal solution is proposed. The proposed algorithm utilizes the spectrum holes in PUs bands as well as active PU bands. The performance of the proposed algorithm is investigated for OFDM and FBMC based CR systems. Simulation results illustrate that the proposed resource allocation algorithm with low computational complexity achieves near optimal performance and proves the efficiency of using FBMC in CR context.
author_names: Musbah M R Shaat

Faouzi Bader
title: Computationally Efficient Power Allocation Algorithm in Multicarrier Based Cognitive Radio Networks: OFDM and FBMC Systems
venue: EURASIP J. Adv. Signal Process.
year: 2010

abstract: Transient analysis of Switching Power Converter (SPC) circuits is a computationally expensive task. This high expense arises from the fact that these circuits are driven by a clock with a period that is very small compared to the time interval the designer is typically interested in. Envelope Following (EF) technique has been recently proposed in the literature for efficient time domain simulation of SPC circuits. In this paper, a parallel high order EF method, which is based on Obreshkov Formula, is presented for analysis of SPC circuits. A numerical example is presented to demonstrate the efficiency and scalability of the proposed method on parallel platforms.
author_names: Mina A Farhan

Emad Gad

Michel S Nakhla

Ramachandra Achar
title: High order Envelope Following method for parallel simulation of Power Converter circuits
venue: 2014 IEEE 23rd Conference on Electrical Performance of Electronic Packaging and Systems
year: 2014

abstract: Cross point architecture, while being appealing in consideration of high integration density, suffers from leakage through sneak paths across the array. The leakage current flowing through half accessed and in some cases, unaccessed cells (and the corresponding leakage power) are important determinants of array performance. Proper estimation of these components is computationally challenging and often demands rigorous simulation efforts. This paper presents a computationally efficient compact model to assess the leakage in cross point array employing threshold switch selectors. We provide closed form mathematical expressions that govern our model and explain the derivation methodologies. We analyze and verify the validity of the model by cross checking with results from conventional rigorous array simulations. The model shows excellent matching ~99% accuracy) with rigorous simulations for different array sizes (16x16 through 256x256) The model has been tested with various ranges of selector OFF resistance (0.1 MO to 1 OO) interconnect resistance (1 mO/ to 10 O/ and access voltage (0.2V to 1V) The test results from the model show accurate response in comparison with those obtained from intensive array simulations.
author_names: Ahmedullah Aziz

Nicholas Jao

Suman Datta

Vijaykrishnan Narayanan

Sumeet Kumar Gupta
title: A computationally efficient compact model for leakage in cross point array
venue: 2017 International Conference on Simulation of Semiconductor Processes and Devices (SISPAD)
year: 2017