Transmission line model for variable step size simulation algorithms

Henschel, S.; Ibrahim, A.I.; Dommel, H.W.

doi:10.1016/s0142-0615(98)00042-8

Cited by 18 publications

(5 citation statements)

References 3 publications

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“…Since the ULM and UM model serve a wide range of transmission lines and rotating machines, they are required to be properly modeled for adaptive time-stepping (ATS) EMT simulation. Although the variable time-stepping model for the traveling-wave line model has already been studied in [7] and [9], to the best of our knowledge, the ATS models for ULM and UM have not been derived. Ramirez and Iravani [10], Camara et al [11] applied the variable time-stepping simulation in frequency domain, but the frequency-domain line model was simplified without involving the convolution process and both simulated the system in software but not in hardware for real time.…”

Section: Introductionmentioning

confidence: 99%

Adaptive Time-Stepping Universal Line and Machine Models for Real-Time and Faster-Than-Real-Time Hardware Emulation

Duan

Dinavahi

2020

2020 IEEE Power &Amp; Energy Society General Meeting (PESGM)

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Transmission lines and rotating machines that widely exist in power systems should be accurately modeled in real-time electromagnetic transient (EMT) simulation for obtaining precise results for hardware-in-the-loop applications. In the conventional EMT simulator, the timestep is fixed, which may lead to inefficiencies when the time constants of the system change. The adaptive timestepping (ATS) method can efficaciously solve this problem; however, the ATS schemes for the universal transmission line model (ULM) and universal machine (UM) model remain to be investigated. This article derives the ATS models for ULM and UM, and the proposed ULM model is more stable than the traditional model. Both ATS models are emulated on the parallel and pipelined architecture of the field-programmable gate array (FPGA). The proposed subsystem-based ATS scheme and the local truncation error (LTE) based time-step control enable the large-scale systems to be simulated in real time and "faster-than-real-time" modes. The IEEE 39-bus system with ATS models is emulated on two interconnected FPGA boards, and the emulation results compared with PSCAD/EMTDC and fixed timestepping (FTS) hardware emulator verify the effectiveness of the proposed models and show that the LTE of ULM and UM can be reduced by 76.5% and 62.0%, respectively, compared with the FTS simulation. Index Terms-Adaptive time-step (ATS), electromagnetic transients (EMTs), faster-than-real-time, fieldprogrammable gate arrays (FPGA), hardware emulation, parallel processing, real-time systems, universal machine (UM), universal transmission line.

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Section: Introductionmentioning

confidence: 99%

Adaptive Time-Stepping Universal Line and Machine Models for Real-Time and Faster-Than-Real-Time Hardware Emulation

Duan

Dinavahi

2020

2020 IEEE Power &Amp; Energy Society General Meeting (PESGM)

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“…2 are related through the following equations: GL = 2L(1 +jWST) (6) 7iL (k) (7) (L T) 2( e(1 +j L(k-1)± 2L(l ; T)VL(k-1)). This becomes the analytic-signal-oriented companion model for the inductor, whose structure is shown in Fig.…”

Section: A Companion Model Using Shiftable Analytic Signalsmentioning

confidence: 99%

“…If the wave propagation time Twp is not an integer multiple of T, i. e. Tp =' rT, then an interpolation procedure is recommended [6]. 2) Model Using Dynamic Phasors: A line model that processes dynamic phasors, which are defined in Appendix I, is proposed in [7]. The particularity of the model is that it is valid for T p even though distributed parameter effects are considered.…”

Section: B Constant Distributed Parameter Line Modelmentioning

confidence: 99%

“…This is made possible through the application of linear interpolation. Applied to analytic signals, the interpolation becomes: (8) s(t -Twp) -p-s(t) +q.s(t -7), Discretization of (42) and (43) and using the above interpolation procedure yield [7]:…”

Section: B Constant Distributed Parameter Line Modelmentioning

confidence: 99%

“…Discrete circuit model of lossless single-phase line for r > Twp [7] III. LINE MODEL USING SHIFTABLE ANALYTIC SIGNALS…”

Section: B Constant Distributed Parameter Line Modelmentioning

confidence: 99%

See 2 more Smart Citations

Modeling of constant distributed parameter transmission line for simulation of natural and envelope waveforms in power electric networks

Gao

Strunz

Proceedings of the 37th Annual North American Power Symposium, 2005.

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A transmission line model with constant distributed parameters for the efficient simulation of diverse transients in power electric networks is proposed. The novelty of the model lies in its capability to simulate both natural waveforms as observed in reality and envelope waveforms that modulate AC carriers. To achieve the bridging between natural and envelope waveforms, the model processes analytic signals whose Fourier spectrums can be shifted. The shift frequency is introduced as a simulation parameter in addition to the time step size. Interpolation is used to obtain results when the wave propagation time between both ends of the line is not an integer multiple of the time step size of the simulation. The model is implemented in a nodal analysis based simulator and validated through the study of the energization of a transmission line.

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Branch companion modeling for diverse simulation of electromagnetic and electromechanical transients

Shintaku

Strunz

2007

Electric Power Systems Research

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Transmission line model for variable step size simulation algorithms

Cited by 18 publications

References 3 publications

Adaptive Time-Stepping Universal Line and Machine Models for Real-Time and Faster-Than-Real-Time Hardware Emulation

Adaptive Time-Stepping Universal Line and Machine Models for Real-Time and Faster-Than-Real-Time Hardware Emulation

Modeling of constant distributed parameter transmission line for simulation of natural and envelope waveforms in power electric networks

Branch companion modeling for diverse simulation of electromagnetic and electromechanical transients

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