Abstract
Closed-loop distribution network can improve power supply reliability and adapt to the injection of DGs. However, problems such as power flowing in both directions have brought challenges to protection and control. A wide area protection and control scheme based on information sharing is proposed, which includes wide area protection control devices and integrated distribution terminals. The scheme uses extensible differential protection principle and load resection method based on load sensitivity to realize adaptive protection and self-healing control for closed-loop distribution network. Finally, the wide area protection and control scheme is compared with the traditional scheme. It shows that the wide area protection and control scheme is feasible, controllable and detectible. In addition, the wide area protection and control scheme has economic advantages such as less space and operation maintenance workload.
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