scholarly journals Dynamic Simulation of Large-Scale Power Systems Using a Parallel Schur-Complement-Based Decomposition Method

2014 ◽  
Vol 25 (10) ◽  
pp. 2561-2570 ◽  
Author(s):  
Petros Aristidou ◽  
Davide Fabozzi ◽  
Thierry Van Cutsem
Keyword(s):  
Power Systems ◽  
Dynamic Simulation ◽  
Decomposition Method ◽  
Large Scale ◽  
Schur Complement

scholarly journals Structural Analysis of Large-Scale Power Systems

2012 ◽  
Vol 2012 ◽  
pp. 1-20
Author(s):  
K. F. Zhang ◽  
X. Z. Dai
Keyword(s):  
Power Systems ◽  
Decomposition Method ◽  
Large Scale ◽  
Structural Characteristics ◽  
Structural Models ◽  
The Self ◽  
Arbitrary System ◽  
Self Similarity ◽  
Hierarchical Levels ◽  
System Topology

Some fundamental structural characteristics of large-scale power systems are analyzed in the paper. Firstly, the large-scale power system is decomposed into various hierarchical levels: the main system, subsystems, sub-subsystems, down to its basic components. The proposed decomposition method is suitable for arbitrary system topology, and the relations among various decomposed hierarchical levels are explicitly expressed by introducing the interface concept. Then, the structural models of various hierarchical levels are constructed in a bottom-up manner. The constructed hierarchical model can reveal the self-similarity characteristic of large-scale power systems.

Hierarchical Structural Model of AC/DC Power Systems

2013 ◽  
Vol 313-314 ◽  
pp. 821-827
Author(s):  
Kai Feng Zhang ◽  
Hai Ming Zhou
Keyword(s):  
Power Systems ◽  
Decomposition Method ◽  
Large Scale ◽  
Structural Model ◽  
Modeling Method ◽  
Hierarchical Decomposition ◽  
New Model ◽  
Dc Power ◽  
The Difference ◽  
Dc Power Systems

The hierarchical decomposition and modeling method of large-scale power systems proposed previously is expanded to be suitable for AC/DC power systems in this paper. In the new model of AC/DC systems, DC systems will have the same position as AC systems. The components in AC/DC power systems are classified into three categories, namely conversion components, DC components and AC components. By analyzing the difference between DC interface and AC interface, the unified structural model suitable for any kind of component in AC/DC systems is built. Then, the hierarchical structural model is derived based on the hierarchical decomposition method. The main characteristics of the proposed AC/DC model are the same as that of previous AC model.

Dynamic Simulation of Large-Scale Power Systems Using a Two-Level Computation Tree Model

2010 ◽  
Vol 11 (5) ◽  
Author(s):  
Z.Y. Xue ◽  
D.Z. Fang ◽  
J.G. Yang
Keyword(s):  
Power Systems ◽  
Power System ◽  
Real Time ◽  
Dynamic Simulation ◽  
Large Scale ◽  
Linear Network ◽  
Tree Model ◽  
Time Dynamic ◽  
Computation Tree ◽  
Tree Traversal

A new tree structure called the two-level computation tree model is proposed for real time dynamic simulation of large-scale power systems. The features of the computation tree method are that the root node of the tree corresponds to a disconnected linear network, which is easy to be dealt with, and the tree leaf-nodes represent the partitioned subsystems. In the process of trajectory simulation, the correction factors of Newton type iteration are computed through a tree traversal procedure. One advantage of the new method is that the computation tasks for all subsystems can be carried out simultaneously using any parallel computation facilities. Case studies on the 10-generator New England test power system and on a representation of Northeast China power system verify the accuracy and validate the potential application of the proposed method in the real time contingency simulation for realistic large-scale power system.

Overview of Subsynchronous Oscillation in Grid-connected Wind Farm

2020 ◽  
Vol 13 (7) ◽  
pp. 969-979
Author(s):  
Xu Pei-Zhen ◽  
Lu Yong-Geng ◽  
Cao Xi-Min
Keyword(s):  
Power Systems ◽  
Wind Turbine ◽  
Large Scale ◽  
Wind Farm ◽  
Wind Farms ◽  
Induction Generator ◽  
Future Research ◽  
Stable Operation ◽  
Subsynchronous Oscillation ◽  
Different Types

Background: Over the past few years, the subsynchronous oscillation (SSO) caused by the grid-connected wind farm had a bad influence on the stable operation of the system and has now become a bottleneck factor restricting the efficient utilization of wind power. How to mitigate and suppress the phenomenon of SSO of wind farms has become the focus of power system research. Methods: This paper first analyzes the SSO of different types of wind turbines, including squirrelcage induction generator based wind turbine (SCIG-WT), permanent magnet synchronous generator- based wind turbine (PMSG-WT), and doubly-fed induction generator based wind turbine (DFIG-WT). Then, the mechanisms of different types of SSO are proposed with the aim to better understand SSO in large-scale wind integrated power systems, and the main analytical methods suitable for studying the SSO of wind farms are summarized. Results: On the basis of results, using additional damping control suppression methods to solve SSO caused by the flexible power transmission devices and the wind turbine converter is recommended. Conclusion: The current development direction of the SSO of large-scale wind farm grid-connected systems is summarized and the current challenges and recommendations for future research and development are discussed.

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