Electromechanical transient synchronous machine model and initial q-axis saturation parameter determination method

A synchronous machine and model technology, applied in the estimation/correction of motor parameters, electrical components, AC motor control, etc., can solve problems such as complex analysis

Active Publication Date: 2017-07-07
CHINA ELECTRIC POWER RES INST +1
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Problems solved by technology

The drawback of considering saturation in a way that modifies the armature reacta

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  • Electromechanical transient synchronous machine model and initial q-axis saturation parameter determination method
  • Electromechanical transient synchronous machine model and initial q-axis saturation parameter determination method
  • Electromechanical transient synchronous machine model and initial q-axis saturation parameter determination method

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Embodiment Construction

[0137] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0138] Such as figure 1 and 2 As shown, the present invention provides a kind of electromechanical transient synchronous machine model, and synchronous machine model comprises d-axis equivalent circuit and q-axis equivalent circuit;

[0139] The d-axis equivalent circuit includes the winding unit on the stator side, the mutual leakage reactance and the D winding unit on the rotor side connected in sequence, and the D winding unit is connected in parallel w...

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Abstract

The invention provides an electromechanical transient synchronous machine model and an initial q-axis saturation parameter determination method. According to the electromechanical transient synchronous machine model, dichotomy is adopted to initialize saturation effects and excitation and damping leakage reactance are considered. The model is mainly characterized in that mutual leakage reactance between excitation and damping windings in a rotor potential equation represents to be only interlinked with the excitation and damping windings but does not pass through a magnetic flux leakage chain of a stator coil; and the dichotomy is used for determining the initial power angle and the initial q-axis saturation armature reaction reactance. According to the model and the parameter determination method by the model, the dichotomy is adopted to initialize the q-axis saturation reactance and the power angle, the difficult problem of using an armature reaction reactance correction mode to consider the saturation influences is solved, and for the first time, using the armature reaction reactance correction mode to consider the saturation influences in a domestic practical electromechanical transient stability analysis program is realized.

Description

technical field [0001] The invention relates to the detection field of photovoltaic grid-connected inverters, in particular to an electromechanical transient synchronous machine model and a method for determining initial q-axis saturation parameters. Background technique [0002] The traditional synchronous machine model used in electromechanical transient stability analysis widely used in power system is attached Figure 4 Shown in [1-7]. The model is based on the following assumptions: the mutual inductance flux linkage between the coils on the same axis, that is, the mutual reactance is equal, and the mutual reactance is equal to the armature reaction reactance, that is, for the d-axis, there are mutual leakage between the stator winding, the excitation winding and the damping winding Resistance is 0. In fact, the mutual leakage flux between the stator winding and the rotor winding needs to cross the air gap, and the corresponding leakage reactance value is small, which ...

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Application Information

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IPC IPC(8): H02P23/14H02P25/02
CPCH02P23/14
Inventor 丁平赵敏安宁李蒙田芳李亚楼李芳黄彦浩夏天陈兴雷何蕾
Owner CHINA ELECTRIC POWER RES INST
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