A node splitting interface algorithm for multi-rate parallel simulation of DC grids

With wider applications of power electronic devices in modern power systems, simulation using traditional electromechanical and electromagnetic simulation tools suffer from low speed and imprecision. Multi-rate technologies can greatly improve simulation efficiency by avoiding simulating the entire...

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Published in:CSEE Journal of Power and Energy Systems Vol. 4; no. 3; pp. 388 - 397
Main Authors: Mu, Qing, Liang, Jun, Zhou, Xiaoxin, Li, Gen, Zhang, Xing
Format: Journal Article
Language:English
Published: Beijing Chinese Society for Electrical Engineering Journal of Power and Energy Systems 01.09.2018
China electric power research institute
Subjects:
Algorithms
Computer simulation
Converters
Electronic devices
Interface stability
Low speed
Simulation
Splitting
Stability analysis
Synchronism
ISSN:2096-0042, 2096-0042
Online Access:Get full text
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Abstract With wider applications of power electronic devices in modern power systems, simulation using traditional electromechanical and electromagnetic simulation tools suffer from low speed and imprecision. Multi-rate technologies can greatly improve simulation efficiency by avoiding simulating the entire system using a small time-step. However, the drawbacks of the current synchronization mechanisms is that they introduce numerical errors and numerical instabilities in multi-rate parallel simulations. An improved multi-rate parallel technology, node splitting interface (NSI), is proposed to reduce errors and enhance simulation stability. A new synchronization mechanism is used to avoid prediction and signal delays. Theoretical analyses are carried out to prove the convergence and absolute stability of the proposed NSI algorithm. This algorithm is particularly suitable for simultaneously investigating long term dynamics of DC grids and fast transients of power electronic converters.
AbstractList With wider applications of power electronic devices in modern power systems, simulation using traditional electromechanical and electromagnetic simulation tools suffer from low speed and imprecision. Multi-rate technologies can greatly improve simulation efficiency by avoiding simulating the entire system using a small time-step. However, the drawbacks of the current synchronization mechanisms is that they introduce numerical errors and numerical instabilities in multi-rate parallel simulations. An improved multi-rate parallel technology, node splitting interface (NSI), is proposed to reduce errors and enhance simulation stability. A new synchronization mechanism is used to avoid prediction and signal delays. Theoretical analyses are carried out to prove the convergence and absolute stability of the proposed NSI algorithm. This algorithm is particularly suitable for simultaneously investigating long term dynamics of DC grids and fast transients of power electronic converters.
Author Zhou, Xiaoxin
Zhang, Xing
Li, Gen
Mu, Qing
Liang, Jun
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CorporateAuthor China Electric Power Research Institute
Cardiff University
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China electric power research institute
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StartPage 388
SubjectTerms Algorithms
Computer simulation
Converters
Electronic devices
Interface stability
Low speed
Simulation
Splitting
Stability analysis
Synchronism
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