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To solve the problem of lacking of accurate protection relay models in power system dynamic simulation, a general modeling method of protection relay based on “virtual relay” is proposed. A “virtual relay” is a kind of simulation for real relay and defined with rules of logic operation. With hierarchical structure and object-oriented modeling strategy, this method has the advantages of clean logic...
Fault simulation is one of the main components of dynamic electric power system simulation programs. In this work, a fault-branch based admittance matrix was used to simulate a variety of multiple symmetrical or asymmetrical faults in unified dynamic power system simulation software. Admittance matrix contraction was employed to process multiple faults and random faults. An important feature of this...
In this paper, the new dual frequency DGS unit cell and its equivalent circuit model have been proposed. Model parameters extracting process was detailed and has been demonstrated its validity by experiment circuits. A significant improvement in effective capacitances is also illustrated. According to dual frequency DGS characteristics discussed in this paper, this newly proposed structure can be...
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