研究目的
To design a photovoltaic inverter with excellent performance by analyzing its nonlinear dynamic behavior and determining its stable operation region.
研究成果
The study concludes that photovoltaic inverter systems exhibit nonlinear behavior under certain parameters, which can be analyzed using bifurcation diagrams, time domain waveforms, and phase-space maps. The correct selection of circuit parameters is crucial for the stable operation of the system. The research provides a stable operation region for the system, offering valuable guidance for the design of photovoltaic inverter circuits.
研究不足
The study focuses on the nonlinear dynamic behavior of a second-order photovoltaic inverter with LC filter under current control, primarily analyzing the effects of photovoltaic voltage, proportional coefficient, and filter inductance. Other parameters and their potential impacts are not extensively researched.
1：Experimental Design and Method Selection:
The study establishes a second-order photovoltaic inverter circuit model under current loop proportional control and obtains its discrete iterative model. Nonlinear behavior is analyzed using bifurcation diagrams, folding diagrams, and phase diagrams.
2：Sample Selection and Data Sources:
The study uses a simulation model constructed in Matlab/Simulink to verify theoretical analyses.
3：List of Experimental Equipment and Materials:
The basic circuit parameters include Upv=250V, L=10mH, R=5Ω, C=50μF, T=100μs, K=
4：3, d=4, f=50Hz, iref=10sin(2πft). Experimental Procedures and Operational Workflow:
The study analyzes the system's nonlinear behavior under varying photovoltaic voltages, proportional coefficients, and filter inductances.
5：Data Analysis Methods:
The study uses time domain waveforms, phase-space maps, and frequency spectrum analysis to verify the correctness of theoretical analyses.
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