Crowbar control algorithms for doubly fed induction generator during voltage dips

Rodriquez, M.; Abad, Gonzalo; Sarasola, Izaskun; Gilabert, A.

doi:10.1109/epe.2005.219521

Cited by 46 publications

(34 citation statements)

References 2 publications

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“…It was shown that using PI rotor current controllers with low bandwidth the problem of stability is avoided, but the problem of low damping remains. Several methods for the improvement of the system are described in [3] and a simple method consisting in an inner control loop acting on the direct axis is presented in [4]. In [5] a quadrature stabilization method is proposed, and in [6], the method presented in [4] is compared with the method presented in [5].…”

Section: Introductionmentioning

confidence: 99%

Analysis of a dq stator flux stabilization method for the doubly-fed induction generator

Marques

2008

2008 IEEE International Symposium on Industrial Electronics

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The doubly-fed induction generator (DFIG) is normally controlled with stator-flux orientation. Stator-voltage orientation can also be adopted. It is a poorly damped system with a natural frequency near the grid frequency. This leads to natural oscillations on the flux and torque and, for stator-flux orientation, in some cases, to instability. An unstable region is verified when fast rotor current controllers are used. Several techniques can be used for the damping and stabilization of this system. This paper presents a study of the DFIG with two active damping and stabilization loops acting at the same time on the rotor d q reference currents. Analytical and simulation results show that this active vector damping method is effective for small perturbations with origin on the stator and large perturbations with origin on the rotor leading to small damping currents. With high gain values on the damping loops, the system is more effective but increases dramatically the damping current. When voltage dips occur, the damping currents should be limited.

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Section: Introductionmentioning

confidence: 99%

Analysis of a dq stator flux stabilization method for the doubly-fed induction generator

Marques

2008

2008 IEEE International Symposium on Industrial Electronics

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“…The DC-link bus voltage can increase rapidly under these conditions, so it is also used as a monitored variable for crowbar triggering. Bidirectional thyristors [8], GTOs [5], [9] or IGBTs [10] are typically used for crowbar switching.…”

Section: A Crowbar Protectionmentioning

confidence: 99%

A Series-Dynamic-Resistor-Based Converter Protection Scheme for Doubly-Fed Induction Generator During Various Fault Conditions

Yang

Fletcher

O’Reilly

2010

IEEE Trans. Energy Convers.

272

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Abstract-This paper proposes a new converter protection method, primarily based on a series dynamic resistor (SDR), that avoids the doubly-fed induction generator (DFIG) control being disabled by crowbar protection during fault conditions. A combined converter protection scheme based on the proposed series dynamic resistor and conventional crowbar is analysed and discussed. The main protection advantages are due to the series topology when compared with crowbar and DC-chopper protection. Various fault over-current conditions (both symmetrical and asymmetrical) are analysed and used to design the protection in detail, including the switching strategy and coordination with crowbar, and resistance value calculations. PSCAD/EMTDC simulation results show that the proposed method is advantageous for fault over-current protection, especially for asymmetrical faults, in which the traditional crowbar protection may malfunction.Index Terms-Series dynamic resistor (SDR), converter protection scheme, doubly-fed induction generator (DFIG), fault ride-through (FRT), wind power generation.

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“…With the grid-connected rules are increasingly strict, it has become a mandatory problem that ensuring the wind power unit is not out-of-step under grid voltage dips. And according to the recent grid codes, wind turbines must have low voltage ride-through (LVRT) capability [1,2]. In wind turbines based on back-to-back converters, using the crowbar circuit is the most popular and reliable scheme to relieve the problems of overcurrent in rotor side converter (RSC) and overvoltage at DC-link during a severe voltage dip [3].…”

Section: Introductionmentioning

confidence: 99%

Control and Simulation Research for LVRT of Wind Energy Generation

Peng¹,

Duan²,

Liu³

2017

Proceedings of the 2017 6th International Conference on Energy and Environmental Protection (ICEEP 2017)

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Abstract. For DFIG-based variable speed wind turbines, the crowbar circuit is commonly used as protection method against sudden drop of the grid voltage caused by short circuit fault during the period of LVRT. And vector control for DFIG is presented in detail. Finally, the simulation results verify that crowbar circuit and the control strategy are effective and prove that crowbar control strategy can limit the overcurrent in the rotor side converter and the overvoltage of the DC bus.

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Crowbar control algorithms for doubly fed induction generator during voltage dips

Cited by 46 publications

References 2 publications

Analysis of a dq stator flux stabilization method for the doubly-fed induction generator

Analysis of a dq stator flux stabilization method for the doubly-fed induction generator

A Series-Dynamic-Resistor-Based Converter Protection Scheme for Doubly-Fed Induction Generator During Various Fault Conditions

Control and Simulation Research for LVRT of Wind Energy Generation

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