Advanced control strategy of DFIG during symmetrical grid fault

Riouch, Tariq; Nichita, Cristian

doi:10.11591/ijpeds.v12.i3.pp1422-1430

Cited by 3 publications

(3 citation statements)

References 23 publications

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“…Where Xr and Xs are the rotor and stator winding reactance respectively; 𝐸 ⃗ 𝑜𝑠 and 𝛿 are the generator induced voltage at no-load and the angle between 𝐸 ⃗ 𝑜𝑠 and 𝑉 𝑠 ⃗⃗⃗ respectively; θIs and θIr are the angle between 𝐼 𝑠 ⃗⃗ and 𝑉 𝑠 ⃗⃗⃗ and between 𝐼 𝑟 ⃗⃗ and 𝑉 𝑠 ⃗⃗⃗ respectively. If the stator current assumed to be lagged the stator output voltage with angle φ, then, ( 9) is rewritten as (10) and (11):…”

Section: Steady State Mathematical Representation Of Dfigmentioning

confidence: 99%

Maximum allowable hp rating of 3-phase induction motor fed through a stand-alone constant V/f controlled DFIG via RSC

Sharawy,

A. Shaltout,

Mohammed Youssef

et al. 2024

Bulletin EEI

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This paper presents a scheme to start three-phase induction motors (IMs) directly connected to terminals of constant V/f controlled doubly fed induction generator (DFIG) through the rotor side converter (RSC). The proposed control is achieved by controlling the output voltage and frequency of stand-alone DFIG via controlling an injected voltage into the rotor circuit through the RSC. The control scheme provides a search for maximum rating of the three-phase IM which can be supplied from a DFIG. The search technique is based on using a simplified mathematical model to find the capability limits of the RSC and DFIG. It is found that these parameters depend on the stator frequency and rotor slip. Therefore, an investigation is performed to find the lowest frequency and the corresponding allowable maximum rating for the IM to be safely started. A typical example is provided in the paper for a 15 kW DFIG. It is shown that this generator could supply a three-phase IM with a maximum rating of 1-hp if it operated at nominal outputs, voltage and frequency, during start-up period. While, using the proposed technique, the same generator could start-up a three-phase IM with maximum power rating of 7.25 hp.

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Section: Steady State Mathematical Representation Of Dfigmentioning

confidence: 99%

Maximum allowable hp rating of 3-phase induction motor fed through a stand-alone constant V/f controlled DFIG via RSC

Sharawy,

A. Shaltout,

Mohammed Youssef

et al. 2024

Bulletin EEI

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“…The GSC is controlled to stabilize the voltage of DC link and keep the reactive power around zero. The advanced strategies were used for the optimal DFIG functioning under normal conditions; direct torque control (DTC), direct power control (DPC), adaptive fuzzy power control and vector control (VC) [9]− [12]. In the event of a disturbed network regime, the DFIG must contribute to the electrical grid stability while remaining connected to the network.…”

Section: Introductionmentioning

confidence: 99%

Design and control of DFIG with SMES storage under symmetrical grid fault

Riouch¹,

Nichita

2023

IJPEDS

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<span lang="EN-US">This paper presents a novel design and robust control for wind conversion systems using DFIG. The system is designed to reduce the problems related to the sudden variation of the wind speed and to improve the sensitivity of the DFIG to grid faults to avoid disconnection of the wind system from the electrical grid. To enhance the DFIG behavior, power fluctuation and to protect power devices under symmetrical faults, a specific superconducting magnetic energy storage (SMES) scheme and its control are proposed. To validate this study, the control structure and strategies were implemented in the MATLAB/Simulink environment. The results obtained by simulation were compared with those using traditional control strategies, they highlight an improvement in the functioning of wind conversion systems of this type, showing the rigor and effectiveness of the proposed strategy.</span>

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“…Furthermore, the second category is external retrofit techniques, which add protective devices to the DFIG system and advanced control strategies, such as rotor-side and stator-side external retrofit techniques, limiting the DC-link and rotor overvoltage and overcurrent, also to remain the stator current and stator voltage on an acceptable level. In light of these findings, different device topologies using protective circuits and storage methods such as damping resistances [5], DC-Chopper, series dynamic braking resistor [6] energy storage system (ESS) [7], [8] are discussed in many types of research. A combination of parallel crowbars and DC Chopper is presented in [9] to reduce the overcurrent in rotor converts and control the DC-link.…”

Section: Introductionmentioning

confidence: 99%

Improved crowbar protection technique for DFIG using fuzzy logic

En-nay

Moufid

Makrini

et al. 2022

IJPEDS

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<span lang="EN-US">A doubly-fed induction generator is the most widely used as a wind turbine generator. Due to its drawbacks, doubly fed induction generator (DFIG) is extremely sensitive to grid disturbances, and the fragility of some components which are costly to the producer. Also, its acquisition value is very high in terms of maintenance time or component cost, causing substantial harm to both the energy production and power supplier. It is required that the DFIG components must be protected, especially power electronics devices and DC-Link capacitor. Therefore, this paper presents an improved crowbar strategy for DFIG. This method is based on the AI technique concept of utilizing a fuzzy logic controller. The main goal of this project is to improve the system performance by reducing the dangerous oscillations of electromagnetic torque, DC-link voltage, and rotor current during fault. This work consists of replacing the hysteresis control for the crowbar with fuzzy logic to realize crowbar-FLC. The proposed crowbar is based on free light chain (FLC) depending on rotor currents and DC-link voltage measurements. The control strategy is simulated in the MATLAB Simulink platform to evaluate the efficiency of the suggested technique.</span>

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Advanced control strategy of DFIG during symmetrical grid fault

Cited by 3 publications

References 23 publications

Maximum allowable hp rating of 3-phase induction motor fed through a stand-alone constant V/f controlled DFIG via RSC

Maximum allowable hp rating of 3-phase induction motor fed through a stand-alone constant V/f controlled DFIG via RSC

Design and control of DFIG with SMES storage under symmetrical grid fault

Improved crowbar protection technique for DFIG using fuzzy logic

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