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 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.

Chaotic dynamics for a class of single-machine-infinite bus power system

2016 ◽  
Vol 24 (3) ◽  
pp. 582-587 ◽  
Author(s):  
Liangqiang Zhou ◽  
Fangqi Chen
Keyword(s):  
Power Systems ◽  
Power System ◽  
Single Machine ◽  
Chaotic Dynamics ◽  
Numerical Results ◽  
Chaotic Motions ◽  
System Parameters ◽  
Critical Curves ◽  
Single Machine Infinite Bus

The chaotic motions are investigated both analytically and numerically for a class of single-machine-infinite bus power systems. The mechanism and parametric conditions for chaotic motions of this system are obtained rigorously. The critical curves separating the chaotic and non-chaotic regions are presented. The chaotic feature of the system parameters is discussed in detail. It is shown that there exist chaotic bands for this system, and the bands vary with the system parameters. Some new dynamical phenomena are presented. Numerical results are given, which verify the analytical ones.

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 Nonlinear robust control for single-machine infinite-bus power systems with input saturation

2017 ◽  
Vol 65 (1) ◽  
pp. 3-9
Author(s):  
Y. Wan
Keyword(s):  
Power Systems ◽  
Power System ◽  
Single Machine ◽  
Input Saturation ◽  
Control Law ◽  
System A ◽  
Control Scheme ◽  
Single Machine Infinite Bus ◽  
The Stability ◽  
Nonlinear Robust

Abstract In this paper, a new control scheme is proposed to achieve stability for a single-machine infinite-bus power system. A power system model simultaneously considering input saturation and time-varying uncertainties is presented. A sufficient condition for the system convergence is given and based on this result, a switching excitation control law with auxiliary system is designed. The stability analysis and simulation results all show that the developed controller is effective.

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.

Detailed Nuclear Power Plant Model for Power System Analysis Based on Matlab-Simulink

2013 ◽  
Vol 291-294 ◽  
pp. 561-570 ◽  
Author(s):  
Jin Tan ◽  
Yue Feng Huang ◽  
Zheng Xu
Keyword(s):  
Power Systems ◽  
Power System ◽  
Nuclear Power ◽  
System Analysis ◽  
Pressurized Water Reactor ◽  
Pressurized Water ◽  
Power Generating Unit ◽  
Long Term Stability ◽  
Load Following ◽  
Single Machine Infinite Bus

To research the load-following capability of the nuclear power generating unit, this paper proposed a detailed mathematical model of the pressurized water reactor (PWR) which is suitable for medium- and long-term stability analysis of power systems. Analyzed the interactions between the nuclear power generating unit and the power system, through the simulations of a single machine infinite bus (SMIB) system. The results show that PWR nuclear power generating unit can meet load following requirements to some degree.

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.

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