Journal ArticleDOI
Characteristic of voltage dips (sags) in power systems
Lidong Zhan,Math Bollen +1 more
Reads0
Chats0
TLDR
In this paper, a generalized dip model is built for all unbalanced voltage dips, taking into account the fault types, transformer types and load connections, and the characterization results in a so-called remaining complex voltage (a generalized magnitude phase angle shift) for balanced and unbalanced dip as well as a factor related to the rotating machine contribution to the source impedance for unbalanced dips.Abstract:
This paper analyzes the characteristic of voltage dips in power systems with special emphasis on unbalanced dips and electrical components analysis. A generalized dip model is built for all unbalanced dips, taking into account the fault types, transformer types and load connections. It shows the transformation for different types of unbalanced dips. The characterization results in a so-called remaining complex voltage (a generalized magnitude phase angle shift) for balanced and unbalanced dips as well as a factor, related to the rotating machine contribution to the source impedance for unbalanced dips. It is shown that the factor is close to unity, so that both balanced and unbalanced dips can be characterized with one phaser.read more
Citations
More filters
Proceedings ArticleDOI
New positive-sequence voltage detector for grid synchronization of power converters under faulty grid conditions
TL;DR: In this article, the authors proposed a new positive-sequence voltage detection system which exhibits a fast, precise, and frequency-adaptive response under faulty grid conditions, which is called DSOGI-PLL.
Journal ArticleDOI
Pliant Active and Reactive Power Control for Grid-Interactive Converters Under Unbalanced Voltage Dips
TL;DR: In this paper, generalized power control strategies based on symmetric-sequence components are proposed to manipulate the delivered instantaneous power under unbalanced voltage dips, and two strategies for simultaneous active and reactive power control are proposed that preserve flexible controllability.
Journal ArticleDOI
Power quality following deregulation
TL;DR: In this article, the authors present methods available in these areas to achieve specified levels of power quality in the deregulated environment, which will affect the standards, system simulation and monitoring tools.
Journal ArticleDOI
Grid Voltage Synchronization for Distributed Generation Systems Under Grid Fault Conditions
Alvaro Luna,Joan Rocabert,J. Ignacio Candela,Juan Ramon Hermoso,Remus Teodorescu,Frede Blaabjerg,Pedro Rodriguez +6 more
TL;DR: In this article, the synchronization capability of three advanced synchronization systems: the decoupled double synchronous reference frame phase-locked loop (PLL), the dual second order generalized integrator PLL, and the three-phase enhanced PLL are analyzed.
Journal ArticleDOI
Adaptive Frequency Estimation in Smart Grid Applications: Exploiting Noncircularity and Widely Linear Adaptive Estimators
TL;DR: This article introduces a unified framework for the estimation of instantaneous frequency in both balanced and unbalanced conditions in a three-phase system, thus consolidating the existing approaches and providing next-generation solutions capable of joint adaptive frequency estimation and system fault identification.
References
More filters
Journal ArticleDOI
Characterisation of voltage sags experienced by three-phase adjustable-speed drives
TL;DR: In this paper, it was shown that voltage sags experienced by three-phase loads such as adjustable-speed drives can be classified into four types, and each sag can further be characterized by a magnitude and a phaseangle jump.
Proceedings ArticleDOI
Characterization of voltage sags in industrial distribution systems
TL;DR: In this paper, the influence of the induction motor load on the characterization of voltage sags has been analyzed in industrial distribution systems. But the authors focused only on the positive-and negative-sequence voltages of the inductive motor.
Journal ArticleDOI
The influence of motor re-acceleration on voltage sags
TL;DR: In this article, a simple motor model is implemented in a method for including interruptions due to voltage sags in the reliability analysis of power systems, and a stochastic voltage sag table is determined.
Proceedings ArticleDOI
Proposed chapter 9 for predicting voltage sags (dips) in revision to IEEE Std 493, the Gold Book
C. Becker,W.B. Braun,Kevin Carrick,T. Diliberti,C. Grigg,J. Groesch,B. Hazen,T. Imel,D. Koval,D. Mueller,T. St. John,L.E. Conrad +11 more
TL;DR: In this paper, the authors proposed a method to predict voltage sag performance without long-term monitoring and before plants are constructed, and the analysis technique proposed for a new chapter 9 in the next revision of IEEE std 493 is shown.