Notice of Violation of IEEE Publication Principles: Modified load flow analysis for integrated AC/DC power systems

2008 ◽  
Author(s):  
Youssef A. Mobarak
Keyword(s):  
Power Systems ◽  
Flow Analysis ◽  
Load Flow ◽  
Load Flow Analysis ◽  
Dc Power ◽  
Dc Power Systems

A new approach for load flow analysis of integrated AC-DC power systems using sequential modified Gauss-Seidel methods

2011 ◽  
Vol 22 (4) ◽  
pp. 421-432 ◽  
Author(s):  
Sabir Messalti ◽  
Saad Belkhiat ◽  
Shahrokh Saadate ◽  
Damien Flieller
Keyword(s):  
Power Systems ◽  
Flow Analysis ◽  
Load Flow ◽  
New Approach ◽  
Load Flow Analysis ◽  
Dc Power ◽  
Dc Power Systems

Operation Characteristics of Zone 3 Distance Protection in Wind Power Systems with Fixed-Speed Induction Generators

2011 ◽  
Vol 12 (4) ◽  
Author(s):  
Shenghu Li
Keyword(s):  
Power Systems ◽  
Wind Power ◽  
Reactive Power ◽  
Flow Analysis ◽  
Load Flow ◽  
Synchronous Generators ◽  
Induction Generators ◽  
Load Flow Analysis ◽  
Wind Power Systems ◽  
Operation Characteristics

The induction generators (IGs) are basic to wind energy conversion. They produce the active power and consume the reactive power, with the voltage characteristics fragile compared with that of the synchronous generators and doubly-fed IGs. In the stressed system states, they may intensify var imbalance, yielding undesirable operation of zone 3 impedance relays.In this paper, the operation characteristics of the zone 3 relays in the wind power systems is studied. With the theoretical and load flow analysis, it is proved that the equivalent impedance of the IGs lies in the 2nd quadrature, possibly seen as the backward faults by the mho relays, i.e. the apparent impedance enters into the protection region from the left side. The undesirable operation may be caused by more wind power, larger load, less var compensation, and larger torque angle.

An Educational Software Package for Power Systems Analysis and Operation

2005 ◽  
Vol 42 (4) ◽  
pp. 369-382 ◽  
Author(s):  
T. Yalcinoz
Keyword(s):  
Power Systems ◽  
Systems Analysis ◽  
Software Package ◽  
Transient Stability ◽  
Educational Software ◽  
Unit Commitment ◽  
Flow Analysis ◽  
Load Flow ◽  
Fault Analysis ◽  
Load Flow Analysis

This paper presents a software package developed in Matlab for teaching power systems analysis and operation. The software package is used to support and enhance power engineering education at both undergraduate and postgraduate levels. The application programs in this package include fault analysis, load flow analysis, transient stability, economic dispatch, unit commitment and load forecasting. All modules of the package are independent of each other. The students or researchers can make copies of the software to study and can modify any module of the package.

Optimal Power Distribution System Planning and Analysis Using Q-GIS and Soft Computing

2020 ◽  
Vol 12 (1) ◽  
pp. 70-83
Author(s):  
Shabbiruddin ◽  
Sandeep Chakravorty ◽  
Karma Sonam Sherpa ◽  
Amitava Ray
Keyword(s):  
Power Systems ◽  
Power Distribution ◽  
Distribution System ◽  
Flow Analysis ◽  
Integrated Approach ◽  
Load Flow ◽  
Strategic Decisions ◽  
Power Distribution System ◽  
Load Flow Analysis ◽  
Private And Public

The selection of power sub-station location and distribution line routing in power systems is one of the important strategic decisions for both private and public sectors. In general, contradictory factors such as availability, and cost, affects the appropriate selection which adheres to vague and inexact data. The work presented in this research deals with the development of models and techniques for planning and operation of power distribution system. The work comprises a wider framework from the siting of a sub-station to load flow analysis. Work done also shows the application of quantum- geographic information system (Q-GIS) in finding load point coordinates and existing sub-station locations. The proposed integrated approach provides realistic and reliable results, and facilitates decision makers to handle multiple contradictory decision perspectives. To accredit the proposed model, it is implemented for power distribution planning in Bihar which consists of 9 divisions. A Cubic Spline Function-based load flow analysis method is developed to validate the proposal.

scholarly journals Implementation and Optimization of GPU-Based Static State Security Analysis in Power Systems

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Yong Chen ◽  
Hai Jin ◽  
Han Jiang ◽  
Dechao Xu ◽  
Ran Zheng ◽  
...  
Keyword(s):  
Sensitivity Analysis ◽  
Power Systems ◽  
Flow Analysis ◽  
Security Analysis ◽  
Load Flow ◽  
Processing Unit ◽  
Static State ◽  
State Security ◽  
Load Flow Analysis ◽  
Matrix Operations

Static state security analysis (SSSA) is one of the most important computations to check whether a power system is in normal and secure operating state. It is a challenge to satisfy real-time requirements with CPU-based concurrent methods due to the intensive computations. A sensitivity analysis-based method with Graphics processing unit (GPU) is proposed for power systems, which can reduce calculation time by 40% compared to the execution on a 4-core CPU. The proposed method involves load flow analysis and sensitivity analysis. In load flow analysis, a multifrontal method for sparse LU factorization is explored on GPU through dynamic frontal task scheduling between CPU and GPU. The varying matrix operations during sensitivity analysis on GPU are highly optimized in this study. The results of performance evaluations show that the proposed GPU-based SSSA with optimized matrix operations can achieve a significant reduction in computation time.

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