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Study on the Transient Angle Stability of Power System with Doubly-Fed Induction Generator Integrated

Author: YuQiang
Tutor: TangYong; SunHuaDong
School: China Electric Power Research Institute
Course: Proceedings of the
Keywords: DFIG angle stability equivalent angle characteristic equivalentexternal characteristic power characteristic
CLC: TM315
Type: Master's thesis
Year: 2013
Downloads: 107
Quote: 0
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Abstract


In the rigorous circumstance of the global energy crisis and environmental deterioration, the development and utilization of the renewable energy have caused widespread concern in the world. Since the beginning of this new century, wind generation has made a raid development. Being a mainstream wind generator, doubly fed induction generator (DFIG) has the different operating characteristics from synchronous generator. With the increase of DFIG installed capacity, the dynamic characteristic of power system will be affected, which may lead to a change in the power system stabilities and bring a new challenge to the safe and stable operation of power system. The paper mainly investigates the impact on the transient angle stability of the power system with DFIG integrated, including the following aspects:(1) The basic structure and operating principle of DFIG is investigated, the mathematic models of the various components of DFIG are built, and the structure and control principle of the control system in DFIG is analyzed.(2) The transient characteristic of DFIG is studied in detail and the dynamic process of stator and rotor flux linkages is analyzed. Besides, on the basis of synchronous generator power angle characteristic, the equivalent power angle characteristic is defined and verified by the simulation results.(3) The equivalent external characteristic is derived and the power characteristic of single side transmission system with DFIG integrated is analyzed. On this basis, an investigation of angle stability of the single side transmission system is given. An IEEE30bus system is utilized to study the multi-machine system angle stability from two different aspects respectively. First, replacing the synchronous generator in the system with equivalent capacity wind generation based on DFIG. Second, connecting the DFIG-based generation at different penetration power levels to the system with no synchronous generators replaced. Then, the effect of different control modes and control system parameters on synchronous generator transient angle stability is analyzed.(4) The theory analysis of single side transmission system angle stability is verified by a real power system, the simulation results suggest the correctness of the theory analysis in this paper.

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CLC: > Industrial Technology > Electrotechnical > Motor > Generators, large the generator group ( Zonglun,) > Wind turbines
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