Improvement Model Damping Low Frequency Oscillations Presence UPFC by Cuckoo Optimization Algorithm

2016 ◽  
Vol 3 (1) ◽  
pp. 67
Author(s):  
M. Yousefi Anarkooli ◽  
H. Afrakhteh
Keyword(s):  
Optimization Algorithm ◽  
Power Flow ◽  
Low Frequency ◽  
Control Voltage ◽  
Frequency Oscillation ◽  
Low Frequency Oscillation ◽  
Software Environment ◽  
Cuckoo Optimization Algorithm ◽  
Low Frequency Oscillations ◽  
Oscillation Damping

<p>Low frequency oscillation (LFO) is a negative phenomenon repeated for the power system increases the risk of instability. In recent years, power systems stabilizer (PSS) for damping low frequency oscillations is used. With FACTS devices such as integrated power flow controller (UPFC) can control power flow and  transient   stability increase.  So, UPFC low   frequency oscillation damping can be used instead of PSS. UPFC through direct control voltage and low frequency oscillation damping can be improved. In this study, a single linear model of synchronous machine connected to an infinite bus Heffron-Philips in the presence of UPFC to improve low frequency oscillation damping is used. The selection of the output feedback parameters for the UPFC controllers is converted to an optimization problem which is solved by cuckoo optimization algorithm (COA). COA, as a new evolutionary optimization algorithm, is used in multiple applications. This optimization algorithm has a strong ability to find the most optimistic results for dynamic stability improvement. The controller UPFC and damping in MATLAB software environment is designed and simulated. The simulation was performed for a variety of loads and for various loads and more effective UPFC controller electromechanical oscillation damping compared to other algorithm types is shown.</p>

scholarly journals Power System Oscillation Damping Using New Facts Device

2015 ◽  
Vol 5 (2) ◽  
pp. 198
Author(s):  
D. Narasimha Rao ◽  
V. Saritha
Keyword(s):  
Power Flow ◽  
Low Frequency ◽  
Current Control ◽  
Frequency Oscillation ◽  
Low Frequency Oscillation ◽  
Basic Model ◽  
Steady State Operation ◽  
Wide Range ◽  
Power Oscillation Damping ◽  
Oscillation Damping

This paper presents about improving stability of the system which can be possible with new FACTS device with more convenient. FACTS devices come under the influence of power electronics equipment. Distributed Power Flow Controller is a FACTS device used for damping low frequency oscillation with new controlling approach. It is valid for a wide range of the operating condition. In this work explain the basic model and its steady state operation, mathematical analysis injection of current control model of the DPFC. Using damping controller used in DPFC facts device as input to implement the task of power oscillation damping .Here this work had a brief study on damping, terminal voltage and excitation voltage at different load conditions, simulation results demonstrate damping low frequency oscillation at nominal, light and heavy loading conditions

scholarly journals A Mechanism of the Interdecadal Changes of the Global Low-Frequency Oscillation

Atmosphere ◽  
2018 ◽  
Vol 9 (8) ◽  
pp. 292
Author(s):  
Ruowen Yang ◽  
Quanliang Chen ◽  
Yuyun Liu ◽  
Lin Wang
Keyword(s):  
Intraseasonal Oscillation ◽  
Low Frequency ◽  
Basic Flow ◽  
Frequency Oscillation ◽  
Low Frequency Oscillation ◽  
Reanalysis Dataset ◽  
Atmospheric Research ◽  
Low Frequency Oscillations ◽  
Environmental Prediction ◽  
Interdecadal Changes

Based on the National Center for Environmental Prediction/National Center for Atmospheric Research reanalysis dataset from 1948 to 2009, this study reveals that global low-frequency oscillation features two major temporal bands. One is a quasi-60-day period known as the intraseasonal oscillation (ISO), and the other is a quasi-15-day period known as the quasi-biweekly oscillation (QBWO). After the mid-1970s, both the ISO and QBWO become intensified and more active, and these changes are equivalently barotropic. The primitive barotropic equations are adopted to study the involved mechanism. It reveals that the e-folding time of the least stable modes of both the ISO and QWBO becomes shorter if the model is solved under the atmospheric basic state after the mid-1970s than if solved under the basic state before the mid-1970s. This result suggests that the atmospheric basic flow after the mid-1970s facilitates a more rapid growth of the ISO and QBWO, and thereby an intensification of the low-frequency oscillations at the two bands.

scholarly journals Research on Governor Parameter Optimization to Suppress Ultra-Low Frequency Oscillation of Power System Caused by Hydropower Unit

2021 ◽  
Vol 2087 (1) ◽  
pp. 012001
Author(s):  
Wei Yan ◽  
Yunbang Sun
Keyword(s):  
Single Machine ◽  
Optimization Algorithm ◽  
Low Frequency ◽  
System Model ◽  
Regulation System ◽  
Frequency Oscillation ◽  
Low Frequency Oscillation ◽  
Speed Regulation ◽  
Damping Torque ◽  
The Relationship

Abstract In the actual power system with hydropower, long-time and ultra-low frequency oscillation events occur many times. It is found that the unreasonable setting of governor parameters is an important reason for the oscillation. Firstly, the single machine on load system model is used to analyse the relationship between the PID parameters of the governor and the system stability, then the relationship between oscillation mode and PID parameters of governor is analyzed by eigenvalue analysis method, and the negative damping provided by speed regulation system is analyzed by damping torque method, and then the particle swarm optimization algorithm is used to optimize the PID parameters. Through the analysis of the step response of the single machine system before and after the optimization and the damping torque coefficient provided by the speed regulation system, it shows the effectiveness of the optimization algorithm. Finally, in the simulation platform MATLAB/SIMULINK, a single machine load system model which is closer to the actual power grid is built. The governor parameters of the generator are simulated and verified, and the PID parameters are adjusted by using the parameters obtained by the optimization algorithm. The results show that the optimized parameters have a good suppression for the ultra-low frequency oscillation.

LQR Design Using LMIs and the Robust D-Stability Criterion for Low-Frequency Oscillation Damping in Power Systems

2021 ◽  
Author(s):  
Jefferson C. Rezende ◽  
Luis Carvalho ◽  
Jozias R. L. Neto ◽  
Marcus V. S. Costa ◽  
Elenilson V. Fortes ◽  
...  
Keyword(s):  
Power Systems ◽  
Stability Criterion ◽  
Low Frequency ◽  
Frequency Oscillation ◽  
Low Frequency Oscillation ◽  
Oscillation Damping

Simulation of Grid Low Frequency Oscillation Based on MATLAB

2014 ◽  
Vol 536-537 ◽  
pp. 1532-1536
Author(s):  
Xin Ke Gou ◽  
Bin Qian ◽  
Run Qing Bai
Keyword(s):  
Power System ◽  
Simulation Model ◽  
Low Frequency ◽  
Power System Stabilizer ◽  
Actual Situation ◽  
Power System Simulation ◽  
Frequency Oscillation ◽  
Low Frequency Oscillation ◽  
Low Frequency Oscillations ◽  
System Stabilizer

This paper describes the generation of low frequency oscillations and suppression methods briefly. Observing a phenomenon of low frequency oscillation of Gansu Grid Power and analysis its actual situation. Therefore, we need establish simplified simulation model in MATLAB environment, then do the simulation with the dual power system simulation model which add to power system stabilizer. Simulation results show that: PSS can solve the problem of low frequency oscillations in a region of Gansu steel caused rapid and effective.

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