研究目的
To propose a combined centralized and local control method for minimizing reactive power flow through substation while keeping voltages within permitted levels in distribution networks with high PV penetration.
研究成果
The proposed methods effectively minimize reactive power flow through substation while keeping voltages within allowable ranges, compared to standard strategies with fixed droop parameters. Future work includes careful design of x(1) and application of conservative margin for voltage control.
研究不足
The stability requirement limits the minimum value of x(1) to be larger than 0.007 by trial and error. The worst cases method might lead to overvoltage under significant changes of PV active power generation.
1：Experimental Design and Method Selection:
The study employs a multi-layer control structure combining centralized and local control methods. Centralized control updates droop parameters for local controllers every 15 minutes based on forecasted data.
2：Sample Selection and Data Sources:
The tested network is an MV network with a
3：0 MVA distribution transformer and 42 nodes, with PVs located at the end of all branches. List of Experimental Equipment and Materials:
The study uses MATLAB codes for Particle Swarm Optimization (PSO) based centralized controller.
4：Experimental Procedures and Operational Workflow:
The methodology involves voltage-dependent local control and PSO-based centralized control to optimize droop parameters.
5：Data Analysis Methods:
The performance of proposed methods is evaluated in terms of voltage deviation, reactive power flow through substation, and resistive energy losses.
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