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This paper shows that after integrating with virtual synchronous generator technology and removing integral path from controller, rotor angle control (RAC) changes to virtual rotor angle droop control, which can be used in stand alone microgrid. The new control strategy has something in common with RAC. First, the control parameters remain unchanged in all controllers. Second, power balance and system...
The penetration level of distributed generation (DG) grows rapidly bringing more frequency fluctuation nowadays. Besides, the power system grows in size day by day; the assumption that the frequencies are the same across the grid is no longer valid. These all bring out problems to the frequency control mechanism currently used. The recently proposed rotor angle control strategy may solve these problems...
In order to mitigate the hazards of arc fault occurring in neutral non-effective grounding system, two arc-suppression methods based on cascaded H-bridge converter were proposed. The converter in shunt in the distribution network produces a proper current to compensate for the fault current, which results in zero voltage between faulty phase and ground. The implementation of proposed methods is presented...
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