Information Visualization Program for Analysis and Education of Power Systems - Part II: Power System Analysis Functions

2020 ◽  
Vol 69 (9) ◽  
pp. 1303-1311
Author(s):  
Byoung-Ho Kim ◽  
Min Hong ◽  
Kyu-Ho Kim ◽  
Hongrae Kim
Keyword(s):  
Power Systems ◽  
Power System ◽  
Information Visualization ◽  
System Analysis ◽  
Power System Analysis

Performance of the Grid-Connected PV System in LV Microgrid Operation

2012 ◽  
Vol 512-515 ◽  
pp. 137-142
Author(s):  
Yan Li ◽  
Li Wang ◽  
Pan Pan Jing ◽  
Bin Bin Zhong ◽  
Bu Han Zhang ◽  
...  
Keyword(s):  
Power Systems ◽  
Power System ◽  
System Analysis ◽  
Low Voltage ◽  
Environmental Benefits ◽  
Pv System ◽  
Load Curve ◽  
Power System Analysis ◽  
Pv Penetration ◽  
Flexible Operation

Microgrids are a future power system configuration providing clear economic and environmental benefits compared to the legacy power systems, as the Grid-Connected PV penetration increases, its reaction in Low Voltage (LV) microgrid has to be taken into account during relative system studies. This paper presents a mathematical model for the Grid-Connected PV, it’s developed by User Define (UD) module on Power System Analysis Software Package (PSASP), PV behavior under several typical weather and typical 1-day load curve is studied in detail, Flexible Operation Strategy to achieve the reasonable voltage level are both considered, PSASP simulation environment is used to analyze the probable operation scenarios of LV microgrid, useful conclusions are summarized at last.

Electrical Faults in Power Systems

2016 ◽  
pp. 1-11
Author(s):  
Abdelkader Abdelmoumene ◽  
Hamid Bentarzi
Keyword(s):  
Fault Detection ◽  
Power Systems ◽  
Power System ◽  
System Analysis ◽  
Electrical Equipment ◽  
Correct Classification ◽  
Power System Analysis ◽  
Electrical Faults

The identification and classification of electrical faults have a great importance in power system analysis. They help in the dimensioning and the adequate choice of electrical equipment, especially, for protective and interrupting devices. This chapter describes the various faults undergone by the power system and removes some ambiguities causing confusions and difficulties for the correct classification of faults. Once the faults terminologies are well understood and properly assessed; they can be used efficiently to develop enhanced algorithms dedicated to fault detection, classification, isolation and diagnostics.

scholarly journals Equal-area criterion in power systems revisited

2018 ◽  
Vol 474 (2210) ◽  
pp. 20170733
Author(s):  
Yong Sun ◽  
Jinpeng Ma ◽  
Jürgen Kurths ◽  
Meng Zhan
Keyword(s):  
Power Systems ◽  
Power System ◽  
Transient Stability ◽  
System Analysis ◽  
Stable Operation ◽  
Equal Area ◽  
Power System Analysis ◽  
Stability Behaviour ◽  
Single Machine Infinite Bus ◽  
Machine Systems

The classic equal-area criterion (EAC) is of key importance in power system analysis, and provides a powerful, pictorial and quantitative means of analysing transient stability (i.e. the system's ability to maintain stable operation when subjected to a large disturbance). Based on the traditional EAC, it is common sense in engineering that there is a critical cleaning time (CCT); namely, a power system is stable (unstable) if a fault is cleared before (after) this CCT. We regard this form of CCT as bipartite. In this paper, we revisit the EAC theory and, surprisingly, find different kinds of transient stability behaviour. Based on these analyses, we discover that the bipartite CCT is only one type among four major types, and, actually, the forms of CCT can be diversified. In particular, under some circumstances, a system may have no CCT or show a periodic CCT. Our theoretical analysis is verified by numerical simulations in a single-machine-infinite-bus system and also in multi-machine systems. Thus, our study provides a panoramic framework for diverse transient stability behaviour in power systems and also may have a significant impact on applications of multi-stability in various other systems, such as neuroscience, climatology or photonics.

Review of Power System Analysis Methods Considering Correlation of Wind-Photovoltaic-Load

2013 ◽  
Vol 860-863 ◽  
pp. 2088-2094 ◽  
Author(s):  
Pan Yu Fang ◽  
Xue Feng Fan ◽  
Jie Ren ◽  
Yi Xia ◽  
De Zhi Chen ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Power Systems ◽  
Power System ◽  
Wind Power ◽  
Large Scale ◽  
System Analysis ◽  
Power System Analysis ◽  
Systems Planning ◽  
Photovoltaic Power ◽  
Planning And Operation

Close attention has been paid to the power generation using renewable energy such as the widespread energy and solar energy. After the integration of large-scale renewable energy, more uncertain factors are brought to the power system, which badly influences systems planning and operation. The wind power, photovoltaic power and load are random but correlative, therefore, it is more logical to study the influence exerted by the integration of renewable energy when considering the uncertainty and it is meaningful to the power systems planning and operation. Based on the summary and survey of previous studies, the technical route of power system analysis concerning the correlation of wind power, photovoltaic power and load is proposed in this paper and some key technologies are discussed. The study of correlation offers valuable analysis and recommendations to the connection of large-scale wind and solar power base.

Power Systems Analysis Toolbox: Planning and Contingency

2012 ◽  
Vol 433-440 ◽  
pp. 3884-3889
Author(s):  
Mohamad R. Khaldi
Keyword(s):  
Power Systems ◽  
Power System ◽  
Transmission Lines ◽  
Systems Analysis ◽  
Power Plants ◽  
System Analysis ◽  
Power System Analysis ◽  
Control Devices ◽  
And Control ◽  
Power Systems Operation

Outages and planning primarily account for the removal and addition of new buses, generating power plants, transmission lines, loads, and control devices, respectively. They occur regularly in power systems operation and restoration, and hence a power system is constantly changing its topology. Therefore, there is a need for a software package to emulate these changes. Power System Analysis Toolbox (PSAT) is designed and developed in Matlab environment to simulate contingencies and expansion of power systems. The IEEE 14-bus power system is used to illustrate the effectiveness of the proposed work.

scholarly journals A Novel Technique to Improve the Online Calculation Performance of Nonlinear Problems in DC Power Systems

Electronics ◽  
2018 ◽  
Vol 7 (7) ◽  
pp. 115 ◽  
Author(s):  
Qingshan Xu ◽  
Yuqi Wang ◽  
Minjian Cao ◽  
Jiaqi Zheng
Keyword(s):  
Power Systems ◽  
Power System ◽  
System Analysis ◽  
Specific Problem ◽  
Nonlinear Problems ◽  
Power System Analysis ◽  
Dc Power ◽  
Grid Topology ◽  
Time Calculation ◽  
The Many

The power system is a nonlinear complicated system. For power system analysis problems, they are mainly based on nonlinear equations. In practical systems, the calculation speed of a specific problem is very important. For most classical power system analysis methods, their one-time calculation speed with enough accuracy is difficult to be further improved after decades of research. However, if we see many-time calculations of different analysis functions as a whole, the new breakout may be made. This paper aims to present a novel foundational technique to improve the many-time calculation performance of power system problems. With the technique in this paper, the analysis of grid topology, bus types and line parameters can be separated, and the speed of online calculation of some problems can be improved by more than 10 times faster without any sacrifice of accuracy. This paper points out why the holistic speed of many-time calculations has the potential to be largely improved. The concept of a linear relationship based nonlinear problem (LRBNP) is proposed, which is critical to this technique. The detailed theory derivations are carefully performed. The proposed technique also shows a new way to understand the power systems. Finally, the verification of the derived formulas is performed.

Identification of External Power System Linear Dynamic Equivalents as MIMO Feedback Blocks for the Study System

2007 ◽  
Vol 8 (5) ◽  
Author(s):  
Hamed Shakouri G. ◽  
Hamid Lesani ◽  
Ali Mohammad Ranjbar ◽  
Hamidreza Radmanesh
Keyword(s):  
Power Systems ◽  
Power System ◽  
Single Machine ◽  
System Analysis ◽  
Dynamic Effects ◽  
Power Networks ◽  
Power System Analysis ◽  
Linear Dynamic ◽  
External Power ◽  
Single Machine Infinite Bus

The necessity of dynamic equivalents for power system analysis has been well known since the expansion of large interconnected power networks, and has been discussed during the last decades. The present paper proposes a new method for constructing dynamic equivalents of power systems. In this method, at the first step the ``study system" is modeled completely via a single machine-infinite bus modeling procedure. Then the ``external system" is identified as a MIMO feedback block of this model in such a manner that can include dynamic effects of the latter on the behavior of the former. The method is successfully experimented on a part of the Iranian southern network.

scholarly journals Comparación de métodos de ubicación de PMU en sistemas de potencia para monitoreo de estabilidad de tensión

2015 ◽  
Vol 20 (1) ◽  
Author(s):  
Sindy Lorena Ramirez Perdomo ◽  
Carlos Arturo Lozano Moncada
Keyword(s):  
Power Systems ◽  
Power System ◽  
Voltage Stability ◽  
System Analysis ◽  
Phasor Measurement Units ◽  
Power System Analysis ◽  
Phasor Measurements ◽  
On Line ◽  
Measurement Units ◽  
Pmu Placement

<p>A power system is subject to disturbances that may lead to voltage stability problems, which eventually may lead to black-outs. On-line phasor measurements may allow anticipating situations leading to voltage instabilities; these on-line measurements can be accomplished by using Phasor Measurement Units – PMU. However, for a power system is not economical or necessary to install PMU at each bus; in order to avoid this situation, it is required to develop a strategy for PMU placement that is useful and convenient, with a limited number of available PMU. This paper presents a review and comparison of some methods for PMU placement in power systems; also, a classification according to the type of observability is done and the application of the method is considered. Finally, a method for monitoring voltage stability in power systems is chosen and it is tested on the IEEE39-bus system using Matlab-Power System Analysis Toolbox PSAT.<strong></strong></p>

The Effects of Harmonics Generated by Industrial Loads in the Power System

2016 ◽  
Vol 856 ◽  
pp. 343-348
Author(s):  
Vezir Rexhepi
Keyword(s):  
Power Systems ◽  
Power System ◽  
Harmonic Analysis ◽  
System Analysis ◽  
Electronic Devices ◽  
Current Waveform ◽  
Nonlinear Loads ◽  
System Analysis And Design ◽  
Analysis And Design ◽  
Power System Analysis

Harmonic analysis studies have become an important component of power system analysis and design on recent years. They are used to quantify the distortion in voltage and current waveform and avoid them to propagate through the AC network. Harmonics are created mainly by nonlinear loads in power systems. Thus, in this paper are analyzed the harmonics created by industrial loads and other electronic devices and their effects.

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