Dynamic participation of doubly fed induction generators in multi-control area load frequency control

Abstract: Load Frequency Control is one of the most essential frequency management technologies in modern power systems (LFC). When employing LFC over a vast region, communication latency is unavoidable. A delay might not only affect system performance but also cause system instability. An alternate design strategy for constructing delay compensators for LFC in one or more control areas utilising an AFPI controller and ANFIS is proposed in this paper. For one-area LFC, a sufficient and required condition for designing a delay compensator is described. It is demonstrated that for multi-area LFC with Area Control Errors (ACEs), each control area can have its own delay controller designed as if it were a one-area system if the index of coupling among the areas is less than the small gain theorem's threshold value. The effectiveness of the proposed technique is validated by simulation experiments on LFCs with communication delays in one and multiple interconnected areas with and without time variable delays.

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Load Frequency Control of HVDC Link Interconnected Power System Using Genetic Algorithm

MENDEL ◽

10.13164/mendel.2019.1.131 ◽

2019 ◽

Vol 25 (1) ◽

pp. 131-138

Author(s):

Saurabh Chanana ◽

Saurabh Kumar

Keyword(s):

Genetic Algorithm ◽

Power System ◽

Frequency Control ◽

Frequency Measurement ◽

Control Area ◽

Load Frequency Control ◽

Support Functions ◽

Interconnected Power System ◽

Load Frequency ◽

Tie Line

Advances in power electronics have improved grid support functions such as tie-line power control and frequency control, making renewable generation and High Voltage DC (HVDC) links more common in power system applications. Load Frequency Control (LFC) systems handle the complex interactions between the distributed generator and the control area with the HVDC link. In this work, LFC of a two-zone system including parallel AC/DC transmission links has been analysed. The parameters of this system are optimised using advanced genetic algorithm resulting in improved performance of system in terms of reduction in peak overshoots and settling time of frequency measurement, tie line power flow and area control error signals in an interconnected power system. The advantage of having parallel HVDC links is also demonstrated when performance is compared to system interconnected with only AC tie line.

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LFC of DFIG based Two Area System using TCPS, SSSC and SMES

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.a4832.129219 ◽

2019 ◽

Vol 9 (2) ◽

pp. 1911-1916

Keyword(s):

Power System ◽

Phase Shifter ◽

Magnetic Energy ◽

Frequency Control ◽

Load Frequency Control ◽

Interconnected Power System ◽

Flexible Ac Transmission ◽

Load Frequency ◽

Doubly Fed ◽

Ac Transmission

The frequency and tie-line power in a system varies as the load changes. Therefore in order to damp the frequency, Load Frequency Control (LFC) is used. The function of the LFC is to minimizes the transient deviation and to make the steady state change in frequency, zero. This paper presents a Load frequency control (LFC) of Doubly Fed Induction Generator (DFIG) based two area system using Thyristor Controlled Phase Shifter (TCPS), Static Synchronous Series Compensator (SSSC) and Superconducting Magnetic Energy storage (SMES). Flexible AC Transmission Systems (FACTS) devices and SMES are used to damp out the frequency oscillations effectively in a power system. In order to maintain the system frequency at nominal value and the oscillations to settle down quickly a fast acting controller is desirable. In this paper a MATLAB based PID controller has been proposed in order to minimize the damping oscillation of the two-area interconnected power system. The results obtained with various combinations are presented and the results were encouraging.

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Stand-Alone Doubly-Fed Induction Generators (DFIGs) With Autonomous Frequency Control

IEEE Transactions on Power Delivery ◽

10.1109/tpwrd.2013.2243170 ◽

2013 ◽

Vol 28 (2) ◽

pp. 752-760 ◽

Cited By ~ 33

Author(s):

Yongzheng Zhang ◽

Boon T. Ooi

Keyword(s):

Frequency Control ◽

Induction Generators ◽

Doubly Fed Induction Generators ◽

Doubly Fed

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Stand-alone Doubly-Fed Induction Generators (DFIGs) with autonomous frequency control

2014 IEEE PES General Meeting | Conference & Exposition ◽

10.1109/pesgm.2014.6938844 ◽

2014 ◽

Cited By ~ 1

Author(s):

Yongzeng Zhang ◽

Boon Teck Ooi

Keyword(s):

Frequency Control ◽

Induction Generators ◽

Doubly Fed Induction Generators ◽

Doubly Fed

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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

International Journal of Engineering Research in Africa ◽

10.4028/www.scientific.net/jera.46.106 ◽

2020 ◽

Vol 46 ◽

pp. 106-124 ◽

Cited By ~ 2

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.

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