A Stability Analysis Method of Single-phase Pulse Rectifier on EMU Network Side
A technology of pulse rectification and analysis method, applied in the direction of irreversible AC power input conversion to DC power output, design optimization/simulation, etc., can solve problems such as difficult to find Lyapunov function, and achieve accurate analysis results
Active Publication Date: 2022-04-29
SOUTHWEST JIAOTONG UNIV
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The Lyapunov stability analysis method is mainly used to design controllers, and it is difficult to find a suitable Lyapunov function; the description function method is an equivalent linearization method to study the stability of nonlinear control systems from the perspective of the frequency domain, which is not applicable here
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[0063] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0064] A method for analyzing the stability of a single-phase pulse rectifier on the grid side of an EMU, comprising the following steps:
[0065] Step 1: Establish a mathematical model in the dq coordinate system of the single-phase pulse rectifier on the EMU side;
[0066] For the two-level topology, the pantograph takes current from the catenary, and after being stepped down by the on-board transformer, it is used as the input of the rectifier. The rectifier converts the input single-phase AC voltage into a stable DC voltage. according to figure 1 As shown, by writing Kirchhoff's first and second law KCL and KVL equations for the AC side and the DC side respectively, the mathematical model of the pulse rectifier on the EMU network side in the dq coordinate system is obtained.
[0067] The mathematical model is as follows:
[0068]
[0...
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The invention discloses a method for analyzing the stability of a single-phase pulse rectifier on the side of a high-speed train network, comprising the following steps: Step 1: establishing a mathematical model in the dq coordinate system of the single-phase pulse rectifier on the side of a high-speed train network; Step 2: according to step 1 The constructed mathematical model establishes a time-domain nonlinear dynamic average model; step 3: find the system equilibrium point according to the time-domain nonlinear dynamic average model in step 2; step 4: according to the stability criterion of the mixed potential function theory, the single-phase pulse rectifier The signal stability criterion of the system; the present invention uses a time-domain nonlinear model to make the system model clear and concise; based on the mixed potential theory, it is obtained that some parameters of the rectifier will affect the stability of the system.
Description
technical field [0001] The invention relates to the technical field of single-phase pulse rectifiers on the side of a motor train network, in particular to a stability analysis method for a single-phase pulse rectifier on the side of a train network. Background technique [0002] With the application of a large number of power electronic components, the single-phase pulse rectifier on the grid side of the EMU has become a very complex nonlinear system, and at the same time it also brings some new problems. Recently, more and more attention has been paid to single-phase pulse rectifiers on the grid side of EMUs, especially their stability. Although many studies have been devoted to the stability analysis of three-phase voltage source rectifiers, little attention has been paid to the stability analysis of single-phase pulse rectifiers on the EMU network side. Huang Meng et al. analyzed the instability phenomenon of three-phase VSC, but it is not clear whether single-phase VSC...
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IPC IPC(8): G06F30/20H02M7/04
CPCH02M7/04
Inventor 刘志刚陈红
Owner SOUTHWEST JIAOTONG UNIV