scholarly journals Sensitivity Analysis and Power Systems: Can We Bridge the Gap? A Review and a Guide to Getting Started

Energies ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 8274
Author(s):  
Mirko Ginocchi ◽  
Ferdinanda Ponci ◽  
Antonello Monti
Keyword(s):  
Sensitivity Analysis ◽  
Power Systems ◽  
Power System ◽  
System Modeling ◽  
Support Tool ◽  
Effective Strategies ◽  
Improper Use ◽  
Research Questions ◽  
Partial Communication ◽  
Selection Of

Power systems are increasingly affected by various sources of uncertainty at all levels. The investigation of their effects thus becomes a critical challenge for their design and operation. Sensitivity Analysis (SA) can be instrumental for understanding the origins of system uncertainty, hence allowing for a robust and informed decision-making process under uncertainty. The SA value as a support tool for model-based inference is acknowledged; however, its potential is not fully realized yet within the power system community. This is due to an improper use of long-established SA practices, which sometimes prevent an in-depth model sensitivity investigation, as well as to partial communication between the SA community and the final users, ultimately hindering non-specialists’ awareness of the existence of effective strategies to tackle their own research questions. This paper aims at bridging the gap between SA and power systems via a threefold contribution: (i) a bibliometric study of the state-of-the-art SA to identify common practices in the power system modeling community; (ii) a getting started overview of the most widespread SA methods to support the SA user in the selection of the fittest SA method for a given power system application; (iii) a user-oriented general workflow to illustrate the implementation of SA best practices via a simple technical example.

Design of Filter based Wide Area Damping Controllers in Power System

2018 ◽  
Vol 19 (2) ◽  
Author(s):  
Mahendra Bhadu ◽  
Nilanjan Senroy
Keyword(s):  
Power Systems ◽  
Power System ◽  
Random Noise ◽  
System Stability ◽  
Wide Area ◽  
Analog Filter ◽  
Process Noise ◽  
Damping Controllers ◽  
Wide Area Damping Controller ◽  
Selection Of

AbstractIn this paper, the concept of analog filter circuit is used for designing of wide area damping controller (WADC) in power system. The designed continuous mode filter based WADC is robust enough to deal with the problem of imperfect communication medium, which include process noise, measurement noise and signal latency in wide area remote signal. Residue method is used for the selection of wide area control signal and controller location. Modelling of imperfect communication network is done using Pade approximation and by inserting Gaussian random noise. The effectiveness of filter based WADC as a power system stability agent is assessed in the frequency domain using two typical test power systems and via appropriate time domain simulations based upon the non-linear model on MATLAB/Simulink software platform.

A SysML based hybrib photovoltaic-wind power system model

2017 ◽  
Vol 1 (2) ◽  
pp. 1
Author(s):  
Doudou Nanitamo Luta ◽  
Atanda K. Raji
Keyword(s):  
Power Systems ◽  
Power System ◽  
Wind Power ◽  
Systems Engineering ◽  
System Modeling ◽  
Point Of View ◽  
Modeling Language ◽  
Wind Power System ◽  
And Behavior ◽  
Model Based Systems Engineering

This paper presents a model of hybrid photovoltaic-wind power system based on SysML (System Modeling Language) which is a modeling language in supports to Model Based Systems Engineering (MBSE) practices. MBSE refers to a formalized procedure of systems development through the application of modeling principles, methods, languages and tools to the complete lifetime of a system.  Broadly speaking, the modeling of power systems is performed using software such as Matlab/Simulink, DigSilent, PowerWorld, ETAP, etc. These tools allow modeling considering a particular point of view depending on the objective that is to be assessed. SysML offers different aspects ranging from specifications and requirements, structure and behavior. This study focuses more specifically on the structural and behavioral modeling of hybrid photovoltaic-wind system; the main objective is to demonstrate the use of SysML in power systems’ modeling by developing models capturing the system’s major requirements, the structure and connection between entities, the interaction between stakeholders and the system itself and lastly, the system’s behavior in terms of transition between states.

scholarly journals Quasi-Z-Source Inverter-Based Photovoltaic Power System Modeling for Grid Stability Studies

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 508
Author(s):  
Lluís Monjo ◽  
Luis Sainz ◽  
Juan José Mesas ◽  
Joaquín Pedra
Keyword(s):  
Power Systems ◽  
Power System ◽  
System Modeling ◽  
Power Conversion ◽  
System Stability ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Stability Problems ◽  
Sensitivity Studies ◽  
And Control

Quasi-Z-source inverters (qZSIs) are becoming a powerful power conversion technology in photovoltaic (PV) power systems because they allow energy power conversion in a single stage operation. However, they can cause system resonances and reduce system damping, which may lead to instabilities. These stability problems are well known in grid-connected voltage source converter systems but not in quasi-Z-source inverter (qZSI)-based PV power systems. This paper contributes with Matlab/Simulink and PSCAD/EMTDC models of qZSI-based PV power systems to analyze transient interactions and stability problems. These models consider all power circuits and control blocks of qZSI-based PV power systems and can be used in sensitivity studies on the influence of system parameters on stability. PV power system stability is assessed from the proposed models. The causes of instabilities are analyzed from numerical simulations and possible solutions are proposed.

scholarly journals Power System Modeling for the Study of High Penetration of Distributed Photovoltaic Energy

Designs ◽  
2021 ◽  
Vol 5 (4) ◽  
pp. 62
Author(s):  
Gustavo Cuello-Polo ◽  
Efraín O’Neill-Carrillo
Keyword(s):  
Renewable Energy ◽  
Power Systems ◽  
Power System ◽  
Electric Power ◽  
Distribution Systems ◽  
System Modeling ◽  
Interdisciplinary Teams ◽  
Electric Power System ◽  
Power System Modeling ◽  
Data Limitations

Many conventional power systems are evolving due to the growth of renewable energy and distributed energy resources (DERs). Modeling the interplay of transmission and distribution systems is critical to analyze how DERs impact a system’s conventional operation and which electric infrastructure improvements are needed to achieve a balance between centralized generation and DERs. This article describes the process, tools, and resources used to model electric power systems with a centralized infrastructure in an isolated context and limited access to actual utility data. Photovoltaic systems installed on residential rooftops were the main design option. This work broadened the typical power system modeling to include planning and social considerations. This integrative engineering-social method allows for interdisciplinary teams to work in the development of a model as part of broader design goals for a renewable-dominant energy system. The Puerto Rico electric power system was used as a case study to demonstrate the process. The integrative engineering-social perspective in developing the model and the actions to manage data limitations are aspects that could be followed in other locations with aggressive renewable energy goals and where utility data are not readily available.

Techno-Economic Analysis of Micro-Grid Based Photovoltaic/Diesel Generator Hybrid Power System for Rural Electrification in Kerkennah, Tunisia

2020 ◽  
Vol 142 (6) ◽  
Author(s):  
Houda Dardour ◽  
Olfa Chouaieb ◽  
Habib Sammouda
Keyword(s):  
Sensitivity Analysis ◽  
Power Systems ◽  
Power System ◽  
Cost Effective ◽  
Economic Feasibility ◽  
Rural Electrification ◽  
Diesel Generator ◽  
Fuel Price ◽  
Micro Grid ◽  
The Impact

Abstract This paper scrutinizes the techno-economic feasibility of a solar hybrid off-grid power system, in a rural area in Tunisia. Hybrid Optimization of Multiple Energy Resources (homer) is used for the design and the optimization of a hybrid photovoltaic (PV)/diesel power system consisting of photovoltaic panels, a diesel generator, a converter, and a battery bank. A sensitivity analysis is carried out to investigate the impact of the key system parameters such as the average load, the diesel fuel price, and the reliability constraints on the system outputs and performance. Sensitivity analysis is also used to compare different system configurations and to identify thresholds and situations in which one configuration is more cost-effective than another. Three system types are considered: PV/battery, PV/diesel/battery, and diesel/battery. The results showed that beyond a certain load threshold, the hybrid system is the most cost-effective and that micro-grid projects based on hybrid PV/Diesel power systems can be a solution for rural electrification in Tunisia where there is no possibilities for the national electric grid extension.

Application of Bifurcation Theory to Subsynchronous Resonance in Power Systems

1998 ◽  
Vol 08 (01) ◽  
pp. 157-172 ◽  
Author(s):  
Ali H. Nayfeh ◽  
Ahmad M. Harb ◽  
Char-Ming Chin ◽  
Anan M. A. Hamdan ◽  
Lamine Mili
Keyword(s):  
Hopf Bifurcation ◽  
Power Systems ◽  
Power System ◽  
Limit Cycle ◽  
System Modeling ◽  
Complex Conjugate ◽  
Conjugate Pair ◽  
Subsynchronous Resonance ◽  
Basin Boundary ◽  
Compensation Level

A bifurcation analysis is used to investigate the complex dynamics of a heavily loaded single-machine-infinite-busbar power system modeling the characteristics of the BOARDMAN generator with respect to the rest of the North-Western American Power System. The system has five mechanical and two electrical modes. The results show that, as the compensation level increases, the operating condition loses stability with a complex conjugate pair of eigenvalues of the Jacobian matrix crossing transversely from the left- to the right-half of the complex plane, signifying a Hopf bifurcation. As a result, the power system oscillates subsynchronously with a small limit-cycle attractor. As the compensation level increases, the limit cycle grows and then loses stability in a secondary Hopf bifurcation, resulting in the creation of a two-period quasiperiodic subsynchronous oscillation, a two-torus attractor. On further increases of the compensation level, the quasiperiodic attractor collides with its basin boundary, resulting in the destruction of the attractor and its basin boundary in a bluesky catastrophe. Consequently, there are no bounded motions. The results show that adding damper windings may induce subsynchronous resonance.

scholarly journals Modeling of Power System Simulation Based on FRTDS

Energies ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2749 ◽  
Author(s):  
Bingda Zhang ◽  
Ruizhao Hu ◽  
Sijia Tu ◽  
Jie Zhang ◽  
Xianglong Jin ◽  
...  
Keyword(s):  
Power Systems ◽  
Power System ◽  
System Modeling ◽  
Parameter Method ◽  
Voltage Coefficient ◽  
Modeling Process ◽  
Simulation Based ◽  
Electromagnetic Transient Simulation ◽  
Field Programmable ◽  
Minimum Estimate

In order to expand the simulation scale of the real-time digital solver based on FPGA (FRTDS, FPGA: field-programmable gate array), the power system modeling process is optimized. The multi-valued parameter method is used to represent the external characteristics of the equipment. The methods of addressing the equivalent admittance and voltage coefficient of the interval unit are discussed in detail. The serial degree of the simulation script is effectively reduced. The disadvantageous effects of asymmetric elements and nonlinear elements on node elimination are analyzed. The elimination order of nodes is determined according to the minimum estimate of the execution time of the simulation script. According to the proposed method to reduce the serial degree and calculation time of the simulation script, software for generating an electromagnetic transient simulation script for power systems is developed. The effectiveness of the software is verified by an example.

scholarly journals Parametric Sensitivity Analysis of Rotor Angle Stability Indicators

Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 5023
Author(s):  
Ashish Shrestha ◽  
Francisco Gonzalez-Longatt
Keyword(s):  
Sensitivity Analysis ◽  
Power Systems ◽  
Power System ◽  
Transient Stability ◽  
Damping Ratio ◽  
Parametric Sensitivity ◽  
Parametric Sensitivity Analysis ◽  
Angle Stability ◽  
Rotor Angle ◽  
Rotor Angle Stability

With the increasing penetration rate of Power Electronic Converter (PEC) based technologies, the electrical power systems are facing the problem of transient stability since the PEC based technologies do not contribute to the system inertia, and the proportion of synchronous generators (i.e., the source of inertia) is in decreasing rate. In addition, PEC based technologies’ components have poor inherent damping. It is very important to analyze the system characteristics of a power system to minimize the potential instabilities during the contingencies. This paper presents the parametric sensitivity analysis of the rotor angle stability indicators for the 39-bus New England power system. The indicators of rotor angle stability analysis such as critical fault clearing time (CCT), Eigenvalue points, damping ratio, frequency deviation, voltage deviation, and generator’s speed deviation are identified and analyzed for three case scenarios; each scenario has six sub-cases with different inertia constants. The results show that the CCTs for each component will be reduced if the inertia reduces at any section of a multi-machine power system. Although the applied three scenarios with six sub-cases are identified to be stable in this analysis, the decreasing inertia constant has significant impact on the power system dynamics.

scholarly journals Formalized reliability analysis during the electric power systems modes management

2020 ◽  
Vol 216 ◽  
pp. 01008
Author(s):  
O.Yu. Sigitov ◽  
N.Sh. Chemborisova ◽  
I.D. Chernenkov
Keyword(s):  
Power Systems ◽  
Power System ◽  
Electric Power ◽  
Electric Power System ◽  
Maximum Efficiency ◽  
System Control ◽  
Power System Control ◽  
Different Types ◽  
Selection Of

The current problem of the selection of the electric power system control nodes, which can be used to solve multicriterial problems of the consumers reliable supply with the electric power of the necessary quality of maximum efficiency is investigated. At the same time, a new method of making decisions while choosing electric power system control nodes is proposed. It is necessary to take into account a set of different types of indicators which characterize different properties of these nodes.

Sensitivity Analysis and Selection of Check Index of Signal Intersection Simulation Model Based on VISSIM

2019 ◽  
Vol 2 (5) ◽  
Author(s):  
Mengda Zhang ◽  
Chenjing Zhou ◽  
Tian-tian Zhang ◽  
Yan Han
Keyword(s):  
Sensitivity Analysis ◽  
Simulation Model ◽  
Optimal Process ◽  
Parameter Calibration ◽  
Index Set ◽  
The Core ◽  
Core Module ◽  
Simulation Parameter ◽  
Simulation Parameters ◽  
Selection Of

Selecting check index quantitatively is the core of the calibration of micro traffic simulation parameters at signal intersection. Five indexes in the node (intersection) module of VISSIM were selected as the check index set. Twelve simulation parameters in the core module were selected as the simulation parameters set. Optimal process of parameter calibration was proposed and model of the intersection of Huangcun west street and Xinghua street in Beijing was built in VISSIM to verify it. The sensitivity analysis between each check index and simulation parameter in their own set was conducted respectively. Sensitive parameter sets of different check indices were obtained and compared. The results show that different indexes have different size of set, and average vehicle delay's is maximum, so it's necessary to select index quantitatively. The results can provide references for scientific selection of the check indexes and improve the study efficiency of parameter calibration.

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