scholarly journals Frequency Control Concerns in the North American Electric Power System

2003 ◽  
Author(s):  
B.J. Kirby
Keyword(s):  
Power System ◽  
Electric Power ◽  
North American ◽  
Frequency Control ◽  
Electric Power System ◽  
The North

scholarly journals Hierarchical MPC Secondary Control for Electric Power System

2014 ◽  
Vol 2014 ◽  
pp. 1-14 ◽  
Author(s):  
Freddy Milla ◽  
Manuel A. Duarte-Mermoud ◽  
Noreys Aguila-Camacho
Keyword(s):  
Control System ◽  
Power Systems ◽  
Power System ◽  
Electric Power ◽  
Frequency Control ◽  
Regulatory System ◽  
Industrial Sector ◽  
Electric Power System ◽  
Regulatory Control ◽  
Secondary Control

Although in electric power systems (EPS) the regulatory level guarantees a bounded error between the reference and the corresponding system variables, to keep its availability in time, optimizing the system operation is required for operational reasons such as, economic and/or environmental. In order to do this, there are the following alternative solutions: first, replacing the regulatory system with an optimized control system or simply adding an optimized supervisory level, without modifying the regulatory level. However, due to the high cost associated with the modification of regulatory controllers, the industrial sector accepts more easily the second alternative. In addition, a hierarchical supervisory control system improves the regulatory level through a new optimal signal support, without any direct intervention in the already installed regulatory control system. This work presents a secondary frequency control scheme in an electric power system, through a hierarchical model predictive control (MPC). The regulatory level, corresponding to traditional primary and secondary control, will be maintained. An optimal additive signal is included, which is generated from a MPC algorithm, in order to optimize the behavior of the traditional secondary control system.

Integration and Enhancement of Load Frequency Control Design for Diverse Sources Power System via DFIG Based Wind Power Generation and Interonnected via Parallel HVDC/EHVAC Tie-Lines

2020 ◽  
Vol 46 ◽  
pp. 106-124 ◽  
Author(s):  
Gulshan Sharma ◽  
K. Narayanan ◽  
I.E. Davidson ◽  
K.T. Akindeji
Keyword(s):  
Power System ◽  
Electric Power ◽  
Frequency Control ◽  
Electric Power System ◽  
Load Frequency Control ◽  
State Variables ◽  
Load Frequency ◽  
Tie Lines ◽  
System States ◽  
Doubly Fed

The present paper discusses the integration as well as contribution of doubly fed induction generator (DFIG) based wind turbines in load frequency control (LFC) of the modern electric power system in order to supply the quality as well as pollution free electric power to the modern customers. In addition the control areas are connected via HVDC tie-line in parallel with EHVAC line with diverse sources i.e. hydro, thermal and gas based power generations in each area. Efforts have been made to propose an optimal LFC design based on the feedback of few state variables which are available for the measurement and contains good information of the complete power system. The LFC design based on few states are implemented and the obtained results are presented to show the LFC enhancement considering DFIG and parallel HVDC/EHVAC lines. Atlast, the beauty and effectiveness of LFC based on few states are compared with LFC design depends on all system states under similar working conditions and the application results are presented.

Gain Schedule PI Fuzzy Load Frequency Control for Two-Area Electric Power System

2020 ◽  
Vol 9 (3) ◽  
pp. 39-50
Author(s):  
Tawfiq H. Elmenfy
Keyword(s):  
Power System ◽  
Electric Power ◽  
Frequency Control ◽  
Electric Power System ◽  
Operating Conditions ◽  
Load Frequency Control ◽  
Rule Base ◽  
Level Control ◽  
Load Frequency ◽  
Gain Schedule

The use of proportional integral (PI) load frequency control (LFC) to ensure the stable and reliable operation of electric power system is practical important. Any imbalance between synchronous generators and consumption loads will cause frequency unstable within the complete power system. The purpose of the load frequency control (LFC) is to keep the power system frequency and the inter-area tie power as near equilibrium point. This article introduces a gain schedule PI fuzzy load frequency control (GLFC) applying to two area electric power system. The GLFC consists of two level control systems, where the PI controller in the conventional form and its parameters are tuned in real time by fuzzy system. A fuzzy rule base is constructed in the form set of IF-THEN that describe how to choose the PI parameters under different operating conditions. The simulation has been conducted in MATLAB Simulink package. The effectiveness of the GLFC is measured by comparison with conventional PI load frequency controller.

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