研究目的
Investigating the influence of photovoltaic grid-connected grid on feeder voltage of distribution network and the variation trend of total harmonic voltage distortion rate THDu.
研究成果
The study concludes that photovoltaic grid connection affects voltage deviation and harmonic distortion in the distribution network, with the impact varying by access capacity and location. The ring network structure can mitigate these effects by reducing equivalent impedance and improving short-circuit capacity.
研究不足
The study focuses on the theoretical analysis and simulation of photovoltaic grid connection's impact on voltage and harmonic distortion, without physical experimental validation.
1：Experimental Design and Method Selection:
Theoretical analysis and PSCAD/EMTDC simulation are employed to study the impact of photovoltaic grid connection on distribution network voltage and harmonic distortion.
2：Sample Selection and Data Sources:
Simulation models based on 10kV distribution network with photovoltaic power supply connected under different conditions.
3：List of Experimental Equipment and Materials:
PSCAD/EMTDC simulation software, photovoltaic modules under different light intensities.
4：Experimental Procedures and Operational Workflow:
Simulation of photovoltaic grid-connected effects under different capacities and locations, observation of voltage deviation and THDu.
5：Data Analysis Methods:
Analysis of voltage deviation and harmonic distortion rate THDu from simulation results.
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