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As a new form of network in current power system, micro-grid is mainly used in low voltage network in the three-phase four-wire operation mode. Multi-access network form of distributed powers makes micro-grid protection have directional function, and has negative impact on the traditional distribution network current protection scheme. Based on the practical application of micro-grid and multi-port...
The paper studies distribution network with comprehensive micro-grid systems with an aim to design an advanced protection and control scheme. The proposed integrated protection and control (IPC) unit, interfacing to the substation measurement devices and micro-grid components through a substation optical Ethernet, is responsible for the protection of the distribution substation and control of its...
The unintentional islanding of micro-grid may cause negative impacts on distribution loads and distributed generations, so it must be detected within the acceptable duration. In this paper a new islanding detection algorithm is proposed. This algorithm introduces the frequency feedback method by the reactive power compensation to derive the frequency continuous shift. Accordingly, the islanding can...
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