研究目的
Investigating the impact of high penetration levels of rooftop solar and wind power distributed generation (DG) on the UK low voltage (LV) network protection system, including reverse power flow and fault current levels.
研究成果
The study concludes that high penetration levels of rooftop DGs can cause reverse power flow and affect fault current levels in the LV network, requiring updates to relay settings and fuse ratings. Proper management of energy storage batteries (ESB) and selection of renewable DGs can mitigate these issues by ensuring power flows from the grid to the LV network, maintaining the network's passive behavior.
研究不足
The study focuses on a specific UK LV network model and may not be directly applicable to other network configurations. The impact of varying weather conditions on renewable energy generation and the scalability of the proposed solutions are areas for further research.
1：Experimental Design and Method Selection:
The study involves modeling the UK LV network with high penetration levels of rooftop DGs, including solar and wind power, and analyzing the impact on reverse power flow and fault current levels. Energy storage batteries (ESB) are used as a remedial measure.
2：Sample Selection and Data Sources:
The study uses a typical UK distribution network model with data from rooftop Photovoltaic (PV) generations and wind power, including home load profiles and wind power generation data from Glasgow Caledonian University campus.
3：List of Experimental Equipment and Materials:
The study involves simulation using Matlab/Simulink software, with a focus on an 11/0.4 kV 500 kVA distribution transformer, residential distributed generation (DG), energy storage batteries (ESB), and electric vehicles (EVs).
4：4 kV 500 kVA distribution transformer, residential distributed generation (DG), energy storage batteries (ESB), and electric vehicles (EVs).
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The study includes simulating the UK LV network with varying penetration levels of DGs, conducting short circuit analysis, and analyzing the impact of ESB and EVs on reverse power flow and fault current levels.
5：Data Analysis Methods:
The study compares short circuit analysis results with the UK passive network to investigate the impact of DG on short circuit currents at the distribution transformer.
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