A model and method for transient stability analysis of self-excited asynchronous generator
A technique for transient stability analysis and asynchronous generators, applied in asynchronous generator control, generator control through magnetic field changes, etc., can solve the problems of low accuracy and rapidity, self-excited voltage build-up and voltage transient stability analysis Problems such as difficult and difficult calculations, to achieve the effects of improving accuracy, realizing stability analysis and control, and reducing overhead
Active Publication Date: 2018-12-11
GUANGXI UNIV
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[0004] In view of this, the present invention provides a self-excited asynchronous generator transient stability analysis model and method to solve the problem of difficulty in the prior art generator self-excited voltage build-up and voltage transient stability analysis and calculation, accuracy and Defects with low speed
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[0046] In the drawings of the embodiments of the present invention, the same or similar symbols correspond to the same or similar components; The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, use a specific Orientation structure and operation, therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes, and should not be construed as limitations on this patent. Those of ordinary skill in the art can understand the specific meanings of the above terms according to specific situations.
[0047] Such as figure 1 As shown, the embodiment of the present invention discloses a self-excited asynchronous generator transient stability analysis mod...
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The invention relates to the technical field of self-excited asynchronous generator and relates to a method and model for transient stability analysis of self-excited asynchronous generator. The method includes steps of according to the SEIG voltage state equation in two-phase orthogonal coordinate system, equation of state of flux linkage, By converting the complex vector coefficients into reduced-order equations of state for complex coefficients and equations of flux linkage for complex coefficients, Then based on the reduced order SEIG equation of state with complex coefficients, the secondorder state equation of self-excited asynchronous generator is deduced and sorted out, Combined with the first order complex coefficient shunt excitation capacitance state differential equation, thestate matrix equation of SEIG 3 *3 order autonomous system is deduced. Based on the complex coefficient Routh recurrence table, the coefficients of the complex coefficient state equation are calculated respectively, and the critical value of SEIG self-excited building voltage is judged according to the calculated coefficients. The invention has high precision of calculation result, can reduce calculation hardware overhead, directly analyze and determine system stability boundary, and quickly calculate boundary value of self-excited asynchronous generator self-excited voltage building and voltage transient stability.
Description
technical field [0001] The invention relates to the technical field of self-excited asynchronous generators, and more specifically relates to a transient stability analysis model and method of a self-excited asynchronous generator. Background technique [0002] The asynchronous motor is the most widely used power motor in the current modern industrial and agricultural production activities. It has a solid structure, high quality and low price, and a wide range of speed regulation. Under certain flux linkage conditions, the asynchronous motor can be directly connected to the prime mover to become an asynchronous generator. Compared with permanent magnet synchronous generators and doubly-fed induction generators, self-excited asynchronous generators (SEIG) have similar stator structures, but squirrel-cage asynchronous generators have more stable and economical rotor structures and no current collectors. Rings and carbon brushes, high reliability and low maintenance cost, no h...
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IPC IPC(8): H02P9/38H02P9/46H02P103/10
CPCH02P9/38H02P9/46H02P2103/10
Inventor 龙军滕开良卢子广甘霖
Owner GUANGXI UNIV
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