Power electronic transformer with adaptive PLL technique for voltage-disturbance ride through

A flexible power distribution unit with medium-frequency isolation enables robust grid operation and voltage disturbance ride-through capabilities.

IEEE Xplore

Field: Electrical Standards

Electrical Standards

10Year<

Canada

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A novel PET for a distribution grid called a flexible power distribution unit is proposed in this paper, and the energy exchange mechanism between the network and the load is revealed. A 30 kW 600 VAC/220 VAC/110 VDC medium-frequency isolated prototype is developed and demonstrated. This paper also presents key control strategies of the PET for electrical distribution grid applications, especially under grid voltage disturbance conditions. Moreover, stability issues related to the grid-connected three-phase PET are discussed and verified with an impedance-based analysis. The PET prototype is tested, and it passes the voltage-disturbance ride-through function. The experimental results verify the power quality control abilities of the PET.

Source: IEEE Xplore

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Topics:

Power system stability

Voltage control

Inverters

Power quality

Phase locked loops

Pulse width modulation

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Power electronic transformer with adaptive PLL technique for voltage-disturbance ride through

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