研究目的
To address voltage issues in distribution networks with high PV penetration by developing a linearized state space model with communication delay and using an LMI-based stability criterion to obtain delay margins for system stability.
研究成果
The paper successfully develops a state space model for PV-integrated distribution networks with communication delays and applies an LMI-based stability criterion to determine delay margins. Simulation results validate the approach, showing it is useful for controller design to enhance system performance and stability, despite minor discrepancies due to linearization.
研究不足
The linearization in modeling introduces small errors between calculated and simulation delay margins. The study assumes time-invariant delays and may not fully capture time-variant or other complex delay scenarios.
1：Experimental Design and Method Selection:
The study involves developing a linearized state space model for a distribution network with PV systems, incorporating communication delays. The LMI approach is used for stability analysis to determine delay margins.
2：Sample Selection and Data Sources:
A small test distribution network with six sub-communities and PV systems connected at Nodes 6 and 7 is used for simulation. Parameters include solar irradiance set to 1000W/m2 at 25°C and specific load sizes.
3：List of Experimental Equipment and Materials:
Not explicitly mentioned in the paper.
4：Experimental Procedures and Operational Workflow:
Simulation studies are conducted to verify the active power control method and calculate delay margins using the LMI criterion. Steps include setting reference voltages, applying delays, and observing system responses.
5：Data Analysis Methods:
The LMI constraints are solved to compute delay margins, and simulation results are compared to theoretical values to assess accuracy.
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