Advanced Electrical and Electronics Engineering: Volume 2 by Yi An Cui, En Ming Xiang (auth.), Jian Lee (eds.)

By Yi An Cui, En Ming Xiang (auth.), Jian Lee (eds.)

2010 First foreign convention on electric and Electronics Engineering was once held in Wuhan, China December 4-5. complicated electric and Electronics Engineering publication comprises seventy two revised and prolonged study articles written by means of in demand researchers partaking within the convention. subject matters lined comprise, energy Engineering, Telecommunication, keep an eye on engineering, sign processing, Iintegrated circuit, digital amplifier, Nano-technologies, Circuits and networks, Microelectronics, Analog circuits, electronic circuits, Nonlinear circuits, Mixed-mode circuits, Circuits layout, Sensors, CAD instruments, DNA computing, Superconductivity circuits. electric and Electronics Engineering will supply the country of artwork of large advances in electric and Electronics Engineering and likewise function a superb reference paintings for researchers and graduate scholars operating with/on electric and Electronics Engineering.

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In: 40th North American Power Symposium, NAPS 2008, pp. 1–6. : Dynamic Behavior of the Doubly Fed Induction Generator During Three-Phase Voltage Dips. : Dynamic Characteristic of The Drive Train of DFIG Wind Turbines During Grid Faults. In: Second International Conference on Intelligent Computation Technology and Automation, pp. : Modeling of Wind Power Plants for Short Circuit Analysis in the Transmission Network. : Modeling of Wind Turbines for Power System Studies. IEEE Transactions on Power System 17(4) (November 2002) Appendix Table 1.

1. 2 Theoretical Analysis The structures and electric field distributions of P+PINN+ fast soft-recovery diode, ordinary rectifier diode of PN and fast rectifier diode of P+IN+ are shown in figure 2 (a),(b),(c). P+PINN+ owns both the advantages of P+IN+and PN. When reversing, owing to base region I, the space charge expand fully leading to increasing the breakdown voltage URRM. Because of N region, there is a restriction on space charge when it expands into N region. It not only meets the breakdown voltage, but also reduces the depth of region I.

2pu, so the wind generators can contribute continuous short-circuit current. 8 Fig. 8. Currents of wind generators response to differnt fault resistance at position k1 6 Conclusion The objective of this paper aimed to investigate the short-circuit characteristics of asynchronous generators and double-fed induction generators, and dynamic model was established in PSCAD / EMTDC. the results showed that: when ocurring three-phase-ground fault, the asynchronous short circuit contribution drops from the initial value to zero and DFIG could contribute continuous short-circuit current; two types wind turbines can provide continuous short-circuit current when two-phase fault happening; and the short-circuit current will increasing when the number of wind generator increasing.

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