Open-switch fault diagnosis and system reconfiguration of doubly fed wind power converter used in a microgrid

Duan, Pan; Xie, Kaigui; Zhang, Li; Rong, Xianwei

doi:10.1109/tpel.2010.2095470

Cited by 88 publications

(41 citation statements)

References 18 publications

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“…The converter is then blocked by its overcurrent protection. Therefore, the AC power would feed in the fault point through the parallel diodes in the VSC (iVSC) [18,19]. Because the equivalent circuit is nonlinear, it can be divided into four stages in detail for the mathematical analysis, as shown in Figure 4.…”

Section: Fault Transient Stagesmentioning

confidence: 99%

Single-Ended Protection Scheme for VSC-Based DC Microgrid Lines

et al. 2018

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Abstract:With the promotion of distributed energy and direct current (DC) loads, the DC microgrid is able to provide a higher power quality and improve the grid efficiency. Various technical issues in DC microgrids are still to be addressed, particularly a proper protection scheme for fault detection and isolation in DC microgrids utilizing voltage source converters (VSCs). In this paper, the pole-to-pole DC fault transient behavior of the VSC-based microgrids is firstly analyzed with four successive stages, and then the exact requirements for protections are presented. Furthermore, a novel single-ended protection scheme based on local transient signals is proposed, which needs no data transmission or synchronization between two ends, ensuring the speed. A four-terminal DC microgrid model was built in PSCAD/EMTDC. Numerous simulations have demonstrated the validity of the proposed scheme.

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Section: Fault Transient Stagesmentioning

confidence: 99%

Single-Ended Protection Scheme for VSC-Based DC Microgrid Lines

et al. 2018

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“…China This work was supported in part by the Natural Science Foundation of Hunan Province under Grants 15C1327 and 2016JJ3125, and in part by the Scientific Research Project of Xiangtan University under Grants 15XZX31 and 16XZX30. model method, knowledgeable method and signal processing method [2][3][4]. Because of the mathematical model of the converter is not precise enough, it restricts the application of the mathematical model method in the fault diagnosis of the power electronic convert.…”

Section: Introductionmentioning

confidence: 99%

Open-circuit Fault Diagnosis of Three-phase Inverter for Grid-connected Distributed Generation System

Fan¹,

Liu²,

Yi³

2018

dteees

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To solve the increase cost of acquisition of multivariate information and the impact of the rapidity of diagnosis system in processing multivariate data, we proposed a novel fault diagnosis method for three-phase inverter based on wavelet packet transform and the probabilistic neural network, which can further improve the accuracy of open-circuit fault diagnosis. The wavelet packet transform is used to extract the feature vector of the output voltage of three-phase inverter. The probabilistic neural network has strong tolerance and can be employed to classify the feature vector. The simulation results show that the method has better diagnosis accuracy, which can diagnose the open-circuit fault effectively. Keywords: Three-phase inverter, fault diagnosis, wavelet packet transform, probabilistic neural network.

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“…However, the influence of the SFCL on the fault characteristic and relay protection of the DC distribution system has had no research results till now. At present, most of the research about relay protection of the DC distribution system does not take the current limiters into consideration [11][12][13][14][15][16][17][18]. These protection schemes all apply a great short-circuit current and a low voltage.…”

Section: Introductionmentioning

confidence: 99%

Protection Principle for a DC Distribution System with a Resistive Superconductive Fault Current Limiter

et al. 2015

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A DC distribution system, which is suitable for access to distributed power generation and DC loads, is one of the development directions in power systems. Furthermore, it could greatly improve the energy efficiency and reduce the loss of power transportation. The huge short circuit current is always a great threat to the safety of the components, especially the capacitors and diodes. A resistive superconductive fault current limiter (SFCL), which could respond quickly once a fault happens and limit the fault current to a relatively low level, becomes a good solution to this problem. In this paper, the operational principle of the resistive SFCL is introduced first, and then, the DC short-circuit fault characteristic of the DC distribution system with the SFCL is analyzed and the effectiveness of the SFCL verified. In order to realize the selectivity of the protection in the DC distribution system with SFCL, a new transient current protection principle based on Ip (the peak value of the current) and tp (the transient time that the current takes to reach its peak value) is proposed. Finally, a model of a 10-kV DC distribution system with an SFCL is established and simulated in PSCAD/METDC. Simulation results have demonstrated the validity of the analysis and protection principle.

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Open-switch fault diagnosis and system reconfiguration of doubly fed wind power converter used in a microgrid

Cited by 88 publications

References 18 publications

Single-Ended Protection Scheme for VSC-Based DC Microgrid Lines

Single-Ended Protection Scheme for VSC-Based DC Microgrid Lines

Open-circuit Fault Diagnosis of Three-phase Inverter for Grid-connected Distributed Generation System

Protection Principle for a DC Distribution System with a Resistive Superconductive Fault Current Limiter

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