Sensing of Ground Fault in Bipolar LVDC Grid
Keywords:
LVDC, Distributed Energy Systems, Ground Fault, BipolarAbstract
The new demand for distributed energy systems (D.E.S) has emerged due to depleting natural energy reserves and for successful implementation of D.E.S, the micro-grid development with low voltage D.C (LVDC) is essential. The Best LVDC topology is bipolar. For practical application of the LVDC system, therefore, it is necessary to perform any simulation in advance by considering various conditions that can occur in an LVDC system. There are different problems in LVDC grid such as cost, security, complexity. The conventional protection schemes will not give best results in developing a secure and reliable network of LVDC. The main difficulty here is identification of ground fault and protecting the front end converter. So, in this paper a bipolar LVDC grid is modelled and ground fault is created and its impact on front end converter is observed. Finally, the ground fault is sensed by the modelled devices and front end converter is isolated on occurrence of fault in Simulink environment.
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