Journal ArticleDOI
Effects of High Level of Penetration of Renewable Energy Sources on Cascading Failure of Modern Power Systems
Xi Zhang,Chi K. Tse +1 more
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In this paper , the authors incorporate the dynamical process of frequency control in modeling cascading failure and assessing the robustness of power systems with a high level of penetration of renewable energy sources.Abstract:
In this paper, we incorporate the dynamical process of frequency control in modeling cascading failure and assessing the robustness of power systems with a high level of penetration of renewable energy sources. Triggered by an initial failure, a power system may be decomposed into multiple subnetworks, where the power imbalance between generation and load can be induced. Frequency control functions including primary, secondary, and emergency frequency control are employed to reduce the frequency deviation to balance the generated power and consumed power. In our simulation model, the power flow process maintains power balance in the steady-state, and a power redistribution process is triggered each time the network changes with the next failure event. The process reiterates until no overloaded component is generated. In the dynamical frequency control process, we differentiate the traditional synchronous machine-based generators from the renewable energy sources that are integrated with power electronic devices and exhibit low inertia. As power electronics integrated renewable sources do not contribute to frequency response, they can be disconnected from the grid due to unexpected frequency deviation. Applying to the IEEE 39-bus power test system, our model captures the salient frequency response process in a failure propagation chain similar to historical scenarios. The frequency deviation is found to increase with the percentage of integrated renewable energy sources, intensifying the cascading failure events. Furthermore, using the IEEE 300-bus test system, we show an increased risk of power outage as the level of penetration of renewable sources increases in the absence of an adequate protective measure.read more
Citations
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Journal ArticleDOI
A Systematic Review on Cascading Failures Models in Renewable Power Systems with Dynamics Perspective and Protections Modeling
TL;DR: In this article , the authors proposed tradeoffs between the existing cascading failure models and solutions to achieve high accuracy and reduce computational complexity, and compared the models in terms of features, limitations, computational speed, and test bus for assisting the tradeoff analysis.
Journal ArticleDOI
Life Cycle Assessment for Geopolymer Concrete Bricks Using Brown Coal Fly Ash
Jingxuan Zhang,S Fernando,David W. Law,Chamila Gunasekara,Sujeeva Setunge,Malindu Sandanayake,Guomin Zhang +6 more
TL;DR: In this article , the authors conducted a life cycle assessment (LCA) of brown coal bricks and found that their primary environmental impacts stemmed from the raw material manufacturing and usage, while exhibiting substantial reductions in ozone depletion, water depletion, and metal depletion.
Sub-Synchronous Oscillations and Transient Stability of Islanded Microgrid
TL;DR: In this paper , the authors studied the stability of sub-synchronous oscillations in an islanded microgrid consisting of grid-forming converters under a large transient disturbance and showed that the stability can be improved by eliminating the hidden attractors through adjusting control parameters and triggering a homoclinic bifurcation.
Journal ArticleDOI
Sub-Synchronous Oscillations and Transient Stability of Islanded Microgrid
TL;DR: In this article , the authors studied the stability of sub-synchronous oscillations in an islanded microgrid consisting of grid-forming converters under a large transient disturbance and showed that the stability can be improved by eliminating the hidden attractors through adjusting control parameters and triggering a homoclinic bifurcation.
Proceedings ArticleDOI
Construction of power equipment fault feature model based on unified semantic expression
TL;DR: Wang et al. as mentioned in this paper proposed a method for building power equipment fault feature model based on unified semantic expression, which can quickly identify the semantic features of fault information in the process of practical application, and effectively improve the recognition effect.
References
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Journal ArticleDOI
MATPOWER: Steady-State Operations, Planning, and Analysis Tools for Power Systems Research and Education
TL;DR: The details of the network modeling and problem formulations used by MATPOWER, including its extensible OPF architecture, are presented, which are used internally to implement several extensions to the standard OPF problem, including piece-wise linear cost functions, dispatchable loads, generator capability curves, and branch angle difference limits.
Journal ArticleDOI
Achieving a 100% Renewable Grid: Operating Electric Power Systems with Extremely High Levels of Variable Renewable Energy
Benjamin Kroposki,Brian Johnson,Yingchen Zhang,Vahan Gevorgian,Paul Denholm,Bri-Mathias Hodge,Bryan Hannegan +6 more
TL;DR: In this article, the authors define what it means to achieve a 100% renewable grid and what it takes to achieve this goal, and how to achieve it in a large-scale manner.
Journal ArticleDOI
Harmonic Stability in Power Electronic-Based Power Systems: Concept, Modeling, and Analysis
Xiongfei Wang,Frede Blaabjerg +1 more
TL;DR: A systematic analysis of harmonic stability in the future power-electronic-based power systems reveals that the linearized models of ac–dc converters can be generalized to the harmonic transfer function, which is mathematically derived from linear time-periodic system theory.
Proceedings ArticleDOI
An initial model fo complex dynamics in electric power system blackouts
TL;DR: The model describes opposing forces, which have been conjectured to cause self-organized criticality in power system blackouts, which result in a dynamic equilibrium in which blackouts of all sizes occur.
Journal ArticleDOI
Connecting Automatic Generation Control and Economic Dispatch From an Optimization View
Na Li,Changhong Zhao,Lijun Chen +2 more
TL;DR: This paper proposes a distributed approach to slightly modify the conventional AGC to improve its economic efficiency by incorporating ED into the AGC automatically and dynamically.