Comparative study on fault responses of synchronous generators and wind turbine generators using transient stability index based on transient energy function

Chowdhury, M. A.; Hosseinzadeh, Nasser; Shen, Weixiang; Pota, H. R.

doi:10.1016/j.ijepes.2013.02.025

Cited by 28 publications

(22 citation statements)

References 19 publications

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“…In Equation (3): xi,k is the magnitude of the discrete point for the reconstructed signal, Si; i = 0, 1, 2, …, 7; k = 1, 2, …, n; n is the number of the signal sampling points. 4. When the energy is high, Ei′ is usually a large number and the calculation will be complicated, so the energy value needs to be normalized, that is:…”

Section: The Wavelet Packet Analysismentioning

confidence: 99%

“…It saves time to find the fault cause and improves the stability of system operation.Energies 2018, 11, 3054 2 of 18 power, and speed can be adjusted independently; power generation with variable-speed and constant-frequency; deep lead phase operation is also possible [2]. Numerous studies have been conducted to study the static stability of asynchronized synchronous generators [3,4] and the operation action for asynchronized turbogenerators with excitation disappearance [5].In the past decade, the research on the loss of excitation faults for the Powerformer have shown that the Powerformer can enter a stable asynchronous operation state within a short period of time [6], and its stator current will increase to 1.2~1.5 times after a loss of excitation [7]. This research group used the modulus maximum detection method of wavelet transform to analyze the electrical quantity signal during the loss of excitation fault and determined the loss of excitation protection scheme for the Powerformer.…”

mentioning

confidence: 99%

“…Energies 2018, 11, 3054 2 of 18 power, and speed can be adjusted independently; power generation with variable-speed and constant-frequency; deep lead phase operation is also possible [2]. Numerous studies have been conducted to study the static stability of asynchronized synchronous generators [3,4] and the operation action for asynchronized turbogenerators with excitation disappearance [5].…”

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confidence: 99%

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Symmetrical Loss of Excitation Fault Diagnosis in an Asynchronized High-Voltage Generator

Gao

Zhang

et al. 2018

Energies

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As a new type of generator, an asynchronized high-voltage generator has the characteristics of an asynchronous generator and high voltage generator. The effect of the loss of an excitation fault for an asynchronized high-voltage generator and its fault diagnosis technique are still in the research stage. Firstly, a finite element model of the asynchronized high-voltage generator considering the field-circuit-movement coupling is established. Secondly, the three phase short-circuit loss of excitation fault, three phase open-circuit loss of excitation fault, and three phase short-circuit fault on the stator side are analyzed by the simulation method that is applied abroad at present. The fault phenomenon under the stator three phase short-circuit fault is similar to that under the three phase short-circuit loss of excitation. Then, a symmetrical loss of the excitation fault diagnosis system based on wavelet packet analysis and the Back Propagation neural network (BP neural network) is established. At last, we confirm that this system can eliminate the interference of the stator three phase short-circuit fault, accurately diagnose the symmetrical loss of the excitation fault, and judge the type of symmetrical loss of the excitation fault. It saves time to find the fault cause and improves the stability of system operation.Energies 2018, 11, 3054 2 of 18 power, and speed can be adjusted independently; power generation with variable-speed and constant-frequency; deep lead phase operation is also possible [2]. Numerous studies have been conducted to study the static stability of asynchronized synchronous generators [3,4] and the operation action for asynchronized turbogenerators with excitation disappearance [5].In the past decade, the research on the loss of excitation faults for the Powerformer have shown that the Powerformer can enter a stable asynchronous operation state within a short period of time [6], and its stator current will increase to 1.2~1.5 times after a loss of excitation [7]. This research group used the modulus maximum detection method of wavelet transform to analyze the electrical quantity signal during the loss of excitation fault and determined the loss of excitation protection scheme for the Powerformer. The protection scheme can effectively prevent the misoperation of the protection device when the system is under a short-circuit fault and oscillation [8]. If we focus on the changes of electrical quantities after a loss of excitation for asynchronized high-voltage generators and adopt an effective loss of excitation fault diagnosis technique, the loss of excitation fault can be accurately determined and remedied in time to ensure the safe and stable operation of the power system. Therefore, it is extremely necessary to investigate the fault diagnosis for asynchronized high-voltage generators.Numerous studies have been done to diagnose the loss of the excitation fault of the generator by measuring the rotor signals [9] and the changes in resistance and reactance [10,11]. The main shortcoming of t...

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Section: The Wavelet Packet Analysismentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Symmetrical Loss of Excitation Fault Diagnosis in an Asynchronized High-Voltage Generator

Gao

Zhang

et al. 2018

Energies

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“…It can be modelled in terms of behaviour equations of each of the subsystems, mainly the turbine, the drive train, the induction generator and the control system. Detailed descriptions can be found in Chowdhury et al (2013aChowdhury et al ( , 2013b, Ekanayake et al (2003), Fernández, Jurado, andSaenz (2008), García-Gracia et al (2008), Ghennam, Berkouk, andFrancois (2009), Gomis-Bellmunt et al (2008), Lima et al (2010), Pak and Dinavahi (2009), Morren and de Haan (2005), Slootweg et al (2003), Tapia et al (2003), Qiao, Venayagamoorthy, and Harley (2009). The configuration of a DFIG wind turbine is shown in Figure 1.…”

Section: System Configuration Of Dfig Wind Turbinementioning

confidence: 99%

A review on transient stability of DFIG integrated power system

Chowdhury

Shen

Hosseinzadeh

et al. 2015

International Journal of Sustainable Engineering

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With the increasing penetration of doubly fed induction generators (DFIGs), the impact of the DFIG on transient stability attracts great attention. Transient stability is largely dominated by generator types in the power system, and the dynamic characteristics of DFIG wind turbines are different from that of the synchronous generators in the conventional power plants. The analysis of the transient stability on DFIG integrated power systems has become a very important issue. This paper reviews the current research on the issue from two aspects. One is to describe the methods to improve the fault ride through capability of DFIG wind turbines and the other is to analyse the impact of the DFIG wind farm on transient stability of power systems.

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“…They suggest a modification of CCT values when wind power is introduced into a power system [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Critical Clearing Time and Wind Power in Small Isolated Power Systems Considering Inertia Emulation

Medina-Domínguez

Medina-Padrón

2015

Energies

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Abstract:The stability and security of small and isolated power systems can be compromised when large amounts of wind power enter them. Wind power integration depends on such factors as power generation capacity, conventional generation technology or grid topology. Another issue that can be considered is critical clearing time (CCT). In this paper, wind power and CCT are studied in a small isolated power system. Two types of wind turbines are considered: a squirrel cage induction generator (SCIG) and a full converter. Moreover, the full converter wind turbine's inertia emulation capability is considered, and its impact on CCT is discussed. Voltage is taken into account because of its importance in power systems of this kind. The study focuses on the small, isolated Lanzarote-Fuerteventura power system, which is expected to be in operation by 2020.

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Comparative study on fault responses of synchronous generators and wind turbine generators using transient stability index based on transient energy function

Cited by 28 publications

References 19 publications

Symmetrical Loss of Excitation Fault Diagnosis in an Asynchronized High-Voltage Generator

Symmetrical Loss of Excitation Fault Diagnosis in an Asynchronized High-Voltage Generator

A review on transient stability of DFIG integrated power system

Critical Clearing Time and Wind Power in Small Isolated Power Systems Considering Inertia Emulation

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