Improving the Steady State Power Systems Operation by an Optimal Formulation

2011 ◽  
Author(s):  
Juan M. Ramirez ◽  
Xiomara Gonzalez ◽  
Miguel Medina ◽  
Rosa E. Correa
Keyword(s):  
Steady State ◽  
Power Systems ◽  
State Power ◽  
Power Systems Operation

Improving the Steady State Power Systems Operation by an Optimal Formulation

2012 ◽  
Author(s):  
Juan M. Ramirez ◽  
Xiomara Gonzalez ◽  
Miguel Medina ◽  
Rosa E. Correa
Keyword(s):  
Steady State ◽  
Power Systems ◽  
State Power ◽  
Power Systems Operation

scholarly journals Steady-State Power Quality Synthetic Evaluation Based on the Triangular Fuzzy BW Method and Interval VIKOR Method

2020 ◽  
Vol 10 (8) ◽  
pp. 2839
Author(s):  
Jidong Wang ◽  
Naixing Ye ◽  
Leijiao Ge
Keyword(s):  
Steady State ◽  
Power Systems ◽  
Power Quality ◽  
Fossil Fuels ◽  
Evaluation Method ◽  
State Power ◽  
Triangular Fuzzy Number ◽  
National Standards ◽  
Vikor Method ◽  
Synthetic Evaluation

With the increasing consumption of fossil fuels, renewable sources power generation has attracted more and more attention. However, with the integration of renewable energy and a large number of non-linear loads in power systems, several power quality problems are attracting the attention of researchers. At present, only national standards for an individual power quality index have been set in China. When evaluating power quality in practice, the individual standard cannot reflect a comprehensive level of power quality. In this paper, a synthetic evaluation method for steady-state power quality is proposed. Firstly, the traditional BW (best-worst) method is improved based on the triangular fuzzy number, to obtain the interval weight of each evaluation index. Then, the interval VIKOR method is used to evaluate the steady-state power quality monitoring data, and the final evaluation results are obtained. The validity of the proposed method is verified by the experimental data from the dynamic simulation laboratory of Tianjin University.

scholarly journals A Robust Online Identification of Sustained Low Frequency Oscillation in Steady-State Power Systems

2019 ◽  
Vol 2019 ◽  
pp. 1-9
Author(s):  
Zhaobi Chu ◽  
Yan Wang ◽  
Min Zhu ◽  
Xueping Dong ◽  
Hua Li
Keyword(s):  
Steady State ◽  
Power Systems ◽  
Oscillation Frequency ◽  
Integral Manifold ◽  
Oscillation Amplitude ◽  
Low Frequency ◽  
State Power ◽  
Design Parameters ◽  
Frequency Oscillation ◽  
Online Identification

For sustained low frequency oscillations in steady-state power systems, an algorithm is proposed for precise online identification of oscillation frequency, oscillation amplitude, and fundamental amplitude. The algorithm consists of a robust low frequency estimator and a notch filter in parallel. The asymptotical convergence property is analyzed by slow integral manifold, averaging method, and Lyapunov stability theorem sequentially. The steady-state antinoise property is investigated by perturbed system theorem. The robust advantages of the proposed algorithm are embodied in the following aspects: the fundamental amplitude identification is little influenced by oscillation frequency and oscillation amplitude, both oscillation frequency identification and oscillation amplitude identification have small steady-state errors under high order harmonics or bounded noises, the ramp variations of both fundamental amplitude and oscillation amplitude are also significantly tracked, and three design parameters have different effects on identification performance of oscillation frequency, oscillation amplitude, and fundamental amplitude, respectively. Simulation results verify the validity.

Steady-State Voltage Stability Enhancement by Using Nonlinear Participation Factor

2012 ◽  
Vol 157-158 ◽  
pp. 1016-1020
Author(s):  
Jing Zhang ◽  
Ting Ting Jiang ◽  
Sheng Wei Mei
Keyword(s):  
Steady State ◽  
Power Systems ◽  
New England ◽  
Voltage Stability ◽  
Reactive Power ◽  
Nonlinear Factor ◽  
Voltage Stability Enhancement ◽  
Bus Voltage ◽  
Stability Enhancement ◽  
Power Systems Operation

Reactive power plays a key role in the power systems operation and stability. By using theory of normal forms of diffeomorphism, this paper proposes an index of bus voltage nonlinear factor, used to measure the effect of buses to the steady-state voltage stability. In order to verify the effectiveness of the proposed method, case studies are performed using the New England 39-bus power system. At the view of steady-state voltage stability enhancement, the results show that the bus voltage nonlinear factor is an effective index. It can give the correct indication of reactive power compensation dispatch.

scholarly journals Series Compensation of Transmission Systems: A Literature Survey

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1717
Author(s):  
Camilo Andrés Ordóñez ◽  
Antonio Gómez-Expósito ◽  
José María Maza-Ortega
Keyword(s):  
Steady State ◽  
Power Systems ◽  
Power System ◽  
Case Studies ◽  
Electronic Devices ◽  
Literature Survey ◽  
Power Electronic ◽  
Transmission Systems ◽  
Series Compensation ◽  
Near Future

This paper reviews the basics of series compensation in transmission systems through a literature survey. The benefits that this technology brings to enhance the steady state and dynamic operation of power systems are analyzed. The review outlines the evolution of the series compensation technologies, from mechanically operated switches to line- and self-commutated power electronic devices, covering control issues, different applications, practical realizations, and case studies. Finally, the paper closes with the major challenges that this technology will face in the near future to achieve a fully decarbonized power system.

Identifying weaknesses in AC shipboard power systems operation during motor starts and reacceleration

2021 ◽  
Vol 197 ◽  
pp. 107328
Author(s):  
Vassilis C. Nikolaidis ◽  
Kostantinos Z. Ioannidis ◽  
John M. Prousalidis
Keyword(s):  
Power Systems ◽  
Shipboard Power Systems ◽  
Shipboard Power ◽  
Power Systems Operation

Impact of Security on Power Systems Operation

2005 ◽  
Vol 93 (11) ◽  
pp. 2013-2025 ◽  
Author(s):  
M. Shahidehpour ◽  
F. Tinney ◽  
Yong Fu
Keyword(s):  
Power Systems ◽  
Power Systems Operation

Circuit Representation of Three-Phase Bridge Convertors

1988 ◽  
Vol 25 (4) ◽  
pp. 351-360 ◽  
Author(s):  
D. B. Watson
Keyword(s):  
Motor Control ◽  
Steady State ◽  
State Power ◽  
Circuit Model ◽  
Variable Frequency ◽  
Circuit Representation ◽  
Three Phase ◽  
Model Circuit

The paper shows that the three-phase bridge convertor can be represented in the steady state by a circuit model. Circuit models are deduced for naturally commutated and forced commutated convertors. Steady state power rectification, inversion, the d.c. link, and variable frequency motor control are described.

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