scholarly journals A novel method for locating the source of sustained oscillation in power system using synchrophasors data

2020 ◽  
Vol 5 (1) ◽  
Author(s):  
Mohd Zuhaib ◽  
Mohd Rihan ◽  
Mohd Tayyab Saeed
Keyword(s):  
Signal Processing ◽  
Power Systems ◽  
Power System ◽  
New England ◽  
Natural Oscillation ◽  
Sustained Oscillation ◽  
Correlation Technique ◽  
Intrinsic Mode Functions ◽  
Data Set ◽  
Machine System

AbstractLarge interconnected power systems are usually subjected to natural oscillation (NO) and forced oscillation (FO). NO occurs due to system transient response and is characterized by several oscillation modes, while FO occurs due to external perturbations driving generation sources. Compared to NO, FO is considered a more severe threat to the safe and reliable operation of power systems. Therefore, it is important to locate the source of FO so corrective actions can be taken to ensure stable power system operation. In this paper, a novel approach based on two-step signal processing is proposed to characterize FO in terms of its frequency components, duration, nature, and the location of the source. Data recorded by the Phasor Measurement Units (PMUs) in a Wide Area Monitoring System (WAMS) is utilized for analysis. As PMU data usually contains white noise and appears as multi-frequency oscillatory signal, the first step is to de-noise the raw PMU data by decomposing it into a series of intrinsic mode functions (IMF) using Improved Complete Ensemble Empirical Mode Decomposition with Adaptive Noise (ICEEMDAN) technique. The most appropriate IMF containing the vital information is selected using the correlation technique. The second step involves various signal processing and statistical analysis tools such as segmented Power Spectrum Density (PSD), excess kurtosis, cross PSD etc. to achieve the desired objectives. The analysis performed on the simulated two-area four-machine system, reduced WECC-179 bus 29 machine system, and the real-time power system PMU data set from ISO New England, demonstrates the accuracy of the proposed method. The proposed approach is independent of complex network topologies and their characteristics, and is also robust against measurement noise usually contained in PMU data.

Study on Characteristics of Modes Instability in Power System with Close Modes

2012 ◽  
Vol 614-615 ◽  
pp. 761-765
Author(s):  
Shu Qiang Zhao ◽  
Hui Xin Lu
Keyword(s):  
Power Systems ◽  
Power System ◽  
New England ◽  
Perturbation Method ◽  
Modal Interaction ◽  
Modal Assurance Criterion ◽  
System Parameters ◽  
Machine System ◽  
Oscillation Modes

When there exist close oscillation modes in power systems, modes instability may occur due to small changes of system parameters. The mechanism of modes instability in power system with close modes is analyzed using perturbation method and Modal Assurance Criterion is presented to measure the modes instability. New England 10-machine system is applied to analyze characteristics of modes instability by perturbing system parameters. The results show that modal interaction is a crucial factor in the modes instability, and the characteristics of modes instability may be different because of the different interaction happened between close modes.

scholarly journals An approach for a multi-stage under-frequency based load shedding scheme for a power system network

2020 ◽  
Vol 10 (6) ◽  
pp. 6071
Author(s):  
Mkhululi Elvis Siyanda Mnguni ◽  
Yohan Darcy Mfoumboulou
Keyword(s):  
Decision Making ◽  
Power Systems ◽  
Power System ◽  
New England ◽  
Operating Conditions ◽  
Load Shedding ◽  
Power Network ◽  
Load Demand ◽  
Multi Stage ◽  
System Frequency

The integration of load shedding schemes with mainstream protection in power system networks is vital. The traditional power system network incorporates different protection schemes to protect its components. Once the power network reaches its maximum limits, and the load demand continue to increase the whole system will experience power system instability. The system frequency usually drops due to the loss of substantial generation creating imbalance. The best method to recover the system from instability is by introducing an under-frequency load shedding (UFLS) scheme in parallel with the protection schemes. This paper proposed a new UFLS scheme used in power systems and industry to maintain stability. Three case studies were implemented in this paper. Multi-stage decision-making algorithms load shedding in the environment of the DIgSILENT power factory platform is developed. The proposed algorithm speeds-up the operation of the UFLS scheme. The load shedding algorithm of the proposed scheme is implemented as a systematic process to achieve stability of the power network which is exposed to different operating conditions. The flexibility of the proposed scheme is validated with the modified IEEE 39-bus New England model. The application of the proposed novel UFLS schemes will contribute further to the development of new types of engineers.

Improvement of large power system with facts devices placement to maxim-IZE the system load ability

2018 ◽  
Vol 7 (2.28) ◽  
pp. 381
Author(s):  
O L. Bekri ◽  
F Mekri
Keyword(s):  
Power Systems ◽  
Power System ◽  
New England ◽  
Power Flow ◽  
Voltage Stability ◽  
Optimal Placement ◽  
Test Case ◽  
Static Synchronous Compensator ◽  
Large Power ◽  
Loading Parameter

Voltage instabilities and/or collapses have been recognized as one of the major causes of power system blackouts. The main objective of this paper is to provide some solutions to prevent large power systems from voltage collapse. The FACTS (Flexible AC Transmission Sys-tems) devices placement gives new opportunities for enhancing voltage stability. The calculation of the loadability point is based on the con-tinuation power flow technique (CPF) to choosing the optimal placement of STATCOM (Static Synchronous Compensator) in order to improve voltage stability by increasing the loading parameter, maintaining bus voltages at desired level and minimizing losses in a power system network.A 39-bus New England power system is chosen as test case in order to illustrate this approach. The obtained results show the efficiency of the proposed method for the planning of the Static Synchronous Compensator optimal placement and the voltage stability enhancement.  

An Underfrequency Load Shedding Scheme with Minimal Knowledge of System Parameters

2015 ◽  
Vol 16 (1) ◽  
pp. 33-46 ◽  
Author(s):  
Athbel Joe ◽  
S. Krishna
Keyword(s):  
Power Systems ◽  
Power System ◽  
New England ◽  
Load Shedding ◽  
Spinning Reserve ◽  
Generator System ◽  
Pass Filter ◽  
Low Pass Filter ◽  
System Parameters ◽  
Frequency Measurements

Abstract Underfrequency load shedding (UFLS) is a common practice to protect a power system during large generation deficit. The adaptive UFLS schemes proposed in the literature have the drawbacks such as requirement of transmission of local frequency measurements to a central location and knowledge of system parameters, such as inertia constant H and load damping constant D. In this paper, a UFLS scheme that uses only the local frequency measurements is proposed. The proposed method does not require prior knowledge of H and D. The scheme is developed for power systems with and without spinning reserve. The proposed scheme requires frequency measurements free from the oscillations at the swing mode frequencies. Use of an elliptic low pass filter to remove these oscillations is proposed. The scheme is tested on a 2 generator system and the 10 generator New England system. Performance of the scheme with power system stabilizer is also studied.

Time-Frequency Analysis for Power System Oscillations

2013 ◽  
Vol 336-338 ◽  
pp. 928-931
Author(s):  
Chia Liang Lu ◽  
Pei Hwa Huang
Keyword(s):  
Power Systems ◽  
Power System ◽  
Frequency Analysis ◽  
Low Frequency ◽  
Normal Operation ◽  
Intrinsic Mode Functions ◽  
Time Frequency Analysis ◽  
Hilbert Huang Transform ◽  
Time Frequency ◽  
Low Frequency Oscillations

Low frequency oscillations due to the lack of damping may occur in power systems under normal operation and will cause system instability. These oscillations are essentially nonlinear power responses which are difficult to extract the inherent characteristics by the time domain method. This paper aims to analyze nonlinear power responses by using the Hilbert-Huang transform (HHT) which is a time-frequency signal processing method which comprises steps of the empirical mode decomposition and the Hilbert transform. Dynamic power system responses, including generator output power and line power are to be processed by the HHT and a set of intrinsic mode functions and the associated Hilbert spectrum are obtained. The generator with most effects on the system will be accordingly found out through the time-frequency analysis and the power system stabilizer will be placed at the generator. Numerical results from a sample power system are demonstrated to show the validity of the time-frequency approach in the study of power system low frequency oscillations.

Sliding-mode perturbation observer-based sliding-mode control design for stability enhancement of multi-machine power systems

2018 ◽  
Vol 41 (5) ◽  
pp. 1418-1434 ◽  
Author(s):  
B Yang ◽  
T Yu ◽  
HC Shu ◽  
W Yao ◽  
L Jiang
Keyword(s):  
Sliding Mode Control ◽  
Power Systems ◽  
Power System ◽  
New England ◽  
Sliding Mode ◽  
Parameter Uncertainties ◽  
Control Effort ◽  
Mode Control ◽  
Perturbation Compensation ◽  
Stability Enhancement

This paper presents the design of a sliding-mode perturbation observer-based sliding-mode control for stability enhancement of multi-machine power systems. The combinatorial effect of nonlinearities, parameter uncertainties, unmodelled dynamics and time-varying external disturbances is aggregated into a perturbation, which is rapidly estimated by a sliding-mode state and perturbation observer and then fully compensated by a sliding-mode controller in real time. The attractiveness of the sliding surface is analysed theoretically in the context of the Lyapunov criterion. The proposed control does not require an accurate system model and only one state measurement is needed. In addition, an over-conservative control effort can be effectively avoided via perturbation compensation. Simulation results for a three-machine power system and the New England power system verify the effectiveness of the proposed approach.

scholarly journals Type-2 Fuzzy Logic Controller Based PSS for Large Scale Power Systems Stability

2018 ◽  
Vol 8 (5) ◽  
pp. 3380-3386 ◽  
Author(s):  
O. Kahouli ◽  
B. Ashammari ◽  
K. Sebaa ◽  
M. Djebali ◽  
H. H. Abdallah
Keyword(s):  
New York ◽  
Fuzzy Logic ◽  
Power Systems ◽  
Power System ◽  
New England ◽  
Large Scale ◽  
Fuzzy Logic Controller ◽  
Interconnected Power System ◽  
Interval Type

In this paper, the application of the fuzzy logic based power systems stabilizer (FLPSS) to damp power system oscillation is presented. Various types of fuzzy logic controller are used to replace the conventional power system stabilizer (CPSS). The classic fuzzy logic controller based PSS (FLCPSS), the polar FLC (PFLCPSS) and the interval type-2 fuzzy logic controller based PSS (IT2FLCPSS) are applied to the New England - New York interconnected power system and the obtained results are compared. For coordination purposes, genetic algorithm (GA) is used to tune the FLCPSS’s gains. The non-linear simulation in the presence of noise confirms the robustness and the superiority of the IT2FLCPSS.

Optimal Design of Wide Area Based on Fuzzy Controller and Intelligent Method

2017 ◽  
Vol 27 (03) ◽  
pp. 449-473 ◽  
Author(s):  
Saeed Setayeshi ◽  
Vahid Bairami Rad ◽  
Alireza Noruzi ◽  
Nasser Yousefi
Keyword(s):  
Power Systems ◽  
Power System ◽  
New England ◽  
Fuzzy Controller ◽  
Controller Design ◽  
Area Measurement ◽  
Wide Area ◽  
Nonlinear Controller ◽  
Measurement Systems ◽  
Interconnected Power Systems

Recently, the controller using wide-area measurement systems (WAMS) signals has been proposed by researchers. But, an unavoidable delay before the wide-area signals exists which is received by the controller. Accordingly, a delay-independent robust control problem of large interconnected power systems is presented based on the hybrid fuzzy controller for wide area measurement. A fuzzy controller is a nonlinear controller and it is not so sensitive to system topology, parameter and operating condition changes as the conventional ones. According to wide area power system complexity and variation of the loads and network conditions, FPSS has been considered in this paper. Furthermore, the proposed controller has been improved by chaotic version of shark smell optimization algorithm (CSSO) as an optimization problem. Effectiveness of the proposed method has been applied over the 10 machine 39 bus New England power system. Finally, the effectiveness of the proposed controller design methodology is demonstrated through simulation example. Obtained results demonstrate the superiority of the proposed strategy.

scholarly journals Localized Transient Stability (LTS) Method for Real-time Localized Control

2018 ◽  
Vol 7 (1) ◽  
pp. 73
Author(s):  
Abdul Malek Miah
Keyword(s):  
Power Systems ◽  
Power System ◽  
New England ◽  
Real Time ◽  
Transient Stability ◽  
Stable Equilibrium ◽  
Measured Data ◽  
Test Results ◽  
Generator System ◽  
Full Power

<p>Very recently, a new methodology was introduced solely for the purpose of real-time localized control of transient stability. The proposed new method is based on the localized transient stability of a power system. This is completely a new idea in transient stability. In this method, the post-fault power system is represented by a two-generator localized power system at the site of each individual generator. If each of these localized power systems reaches its respective stable equilibrium, then the full power system also reaches its stable equilibrium. Therefore, in terms of real-time localized control of transient stability, if each of the localized power systems is driven to its respective stable equilibrium by local control actions with local computations using the locally measured data, then the full power system is driven to its stable equilibrium. Thus the method can be easily implemented for real-time localized control of transient stability. In this paper, the details of the mathematical formulations are presented. Some interesting test results on the well-known New England 39-bus 10-generator system are also presented in this paper to demonstrate the potential of the proposed method for use in real-time localized control of transient stability.</p><p> </p>

Wind/Hybrid Power System Applications for New England Islands

2003 ◽  
Vol 27 (2) ◽  
pp. 143-155 ◽  
Author(s):  
James F. Manwell ◽  
Jon G. McGowan ◽  
Gabriel Blanco
Keyword(s):  
Power Systems ◽  
Power System ◽  
New England ◽  
Feasibility Study ◽  
Electricity Supply ◽  
Hybrid Power Systems ◽  
Hybrid Power System ◽  
Technical Performance ◽  
Hybrid Power

This paper summarizes a feasibility study of potential wind-hybrid power systems for the islands of New England. The work included the compilation of an inventory of New England coastal islands, a categorization of the islands according to energy related criteria, and an overview of their present electricity supply. It also includes a proposal of wind-hybrid power systems for two selected islands, and an estimation of their technical performance and economic merits.

Sign in / Sign up

Export Citation Format

Share Document