Load Frequency Control of Multi-Source Power System with Redox Flow Batteries: An Analysis

Parmar, K. P. Singh

doi:10.5120/15376-4053

Cited by 8 publications

(5 citation statements)

References 31 publications

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“…Modern power grids keep moving toward a complex large artificial system (Saiteja and Krishnarayalu, 2015;Wilches-Bernal and Chow, 2015). The interactions of the power components are more sophisticated in such a way that, a small grid disturbance may trigger a chain reaction, resulting in power blackouts due to cascading failures (Kumar and Kothari, 2005;Singh, 2014). The outages of the power system elements and the unforeseen spreading of the cascading failure of the system could cause a great mismatch of power.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Dynamic Behaviour of Grid Connected Wind Farms in Load Participation and Frequency Regulation

Okedu

Barghash

2021

Front. Energy Res.

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The control of grid frequency in power systems due to the penetration of wind turbines is vital to maintaining the stability of power grids, based on recent grid requirements. In this paper, the dynamic behaviour of a wind farm connected to an existing grid is presented. The existing grid is made up of steam turbines, while the wind farm is based on squirrel cage induction generators. An energy capacitor system is used to stabilize the wind farm during periods of wind speed change. Loads with various capacities were connected to the grid to test the robustness of the controllers of the energy capacitor system employed. Furthermore, the effect of varying the time constant of the in-built DC-DC chopper of the energy capacitor system was investigated, considering load participation in the grid. One of the targets of this paper is the stabilization of the grid frequency of the network, despite the load capacity and the nature of the wind speed in the wind farm. The system performance was evaluated using Power System Computer Design and Electromagnetic Transient Including DC (PSCAD/EMTDC). The same conditions of operation were used to investigate the various scenarios considered in this study, to ensure an effective comparison. The natural wind speed employed was the same for all the considered scenarios. The presented results show that small load capacity with a high value low pass filter time constant, provided better response for the grid frequency and the entire variables of the power network.

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Section: Introductionmentioning

confidence: 99%

Enhanced Dynamic Behaviour of Grid Connected Wind Farms in Load Participation and Frequency Regulation

Okedu

Barghash

2021

Front. Energy Res.

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“…From the principle of Clarke and Park transformation, the abc to dq conversion can be carried out using the rotor reference frame. Thus, Equations ( 3) and ( 4) above can be expressed based on dq frame as [43,44] i qdr = i qr + ji dr (5) where 𝜔 is the electrical angular velocity (𝜔 = 𝜔 − 𝜔 ), 𝜆 is the stator flux linkage, is the magnetizing inductance, 𝐿 is the stator inductance, and 𝑖 * is the conjugate the rotor current. From the principle of Clarke and Park transformation, the abc to conversion can be carried out using the rotor reference frame.…”

Section: Dfig Flywheel Control Strategymentioning

confidence: 99%

“…Consequently, this wind generator possesses a limited ability for grid frequency and voltage control. However, in order to overcome this wind generator shortcoming, reactive compensation devices known as flexible ac transmission systems (FACTS), such as static synchronous series compensators (SSSCs), static compensation (STATCOM) systems, or energy capacitor systems (ECSs), superconducting magnetic energy storage systems (SMESs), and battery energy storage system (BESSs), are normally used with it [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of Grid Frequency Stability Using Flywheel-Based Variable-Speed Drive and Energy Capacitor System

Okedu

Kalam

2023

Energies

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Recently, there has been a rise in the integration of renewable energy sources into power grids. As a result of this, there is a need to carry out new studies in order to understand the dynamics of power grids during disturbances that is mainly caused by the stochastic nature of wind energy. The operation of modern power grids that are tied to wind farms follows a stipulated grid requirement or grid codes, considering the allowable threshold frequency variation during grid dynamics. This paper presents a comparative study of two frequency control schemes considering grid frequency stability using two frequency control topologies. A novel dynamic flywheel scheme with a doubly fed induction generator (DFIG) variable-speed wind turbine with the coordinated control of excess kinetic energy and mechanical torque during operation was the first scheme, and a control strategy of an energy capacitor system (ECS) with a squirrel cage induction generator fixed-speed wind turbine (FSWT) was the second scheme. The salient part of this study was that the DFIG maximum point power tracking for effective smoothing of the output of the wind generator in the first scheme was designed based on the control strategy of its reference power to achieve smoothing of the wind power at the terminals of the wind generator. The model system employed in this work was a wind farm that is tied to a conventional power grid made of steam and hydro synchronous turbines. For an effective and fair comparison of results, the same natural wind speed was used in PSCAD/EMTDC for both schemes. When no control, Scheme 1, and Scheme 2 were implemented, the frequency dips were 47.20, 49.99, and 49.99 Hz with overshoots of 50.500, 50.005, and 50.001 Hz and recovery times of over 600.00, 0.01, 0.01 s, respectively, for the frequency variable.

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“…Moreover, the RFBs are not aged by frequent charging and discharging. In addition, the RFBs have many advantages such as: long service life, ease in maintenance, simple operating principle, suitability for high capacity systems, and quick start‐up [35, 36]. Recently, the RFBs have been investigated in LFC scheme in order to enhance the system frequency response under load disturbances.…”

Section: Redox Flow Batteriesmentioning

confidence: 99%

LFC enhancement concerning large wind power integration using new optimised PID controller and RFBs

Kouba

Menaa

Hasni

et al. 2016

IET Generation, Transmission & Distribution

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Load Frequency Control of Multi-Source Power System with Redox Flow Batteries: An Analysis

Cited by 8 publications

References 31 publications

Enhanced Dynamic Behaviour of Grid Connected Wind Farms in Load Participation and Frequency Regulation

Enhanced Dynamic Behaviour of Grid Connected Wind Farms in Load Participation and Frequency Regulation

Comparative Study of Grid Frequency Stability Using Flywheel-Based Variable-Speed Drive and Energy Capacitor System

LFC enhancement concerning large wind power integration using new optimised PID controller and RFBs

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