Quantum mechanics

Forward converter

Switched-mode power supply

Voltage

Engineering

Isolation transformer

Energy efficient transformer

Distribution transformer

Delta-wye transformer

Power (physics)

Harmonics

Computer science

Boost converter

Power factor

Physics

Transformer effect

Electric power system

Electronic engineering

Transformer

Electrical engineering

IEEE Transactions on Power Delivery

This article proposes a new architecture for the hybrid distribution transformer (HDT) with a partially rated power converter connected in series with the existing distribution transformer. The proposed single-phase system is constructed by adding a three-legged power converter in series to the existing transformer's primary side. Here, the way the converter is connected to the transformer's two taps provides the following advantages: 1) It is possible to reduce the power converter's power rating, and 2) An additional current loop, which gives a degree of freedom, is added. For better power quality, the proposed system synthesizes a voltage vector to compensate for the voltage sags/swells and the grid voltage harmonics. Furthermore, it improves the grid's power factor to increase the power transmission efficiency. The proposed system meets the needs of smart grids in terms of resilience. The configuration, control strategies, analysis, and activation/deactivation sequence of the proposed system are discussed in this article. Real-scale simulations and lab-scale experiments were performed to validate the proposed system, and the system's effectiveness was verified through the obtained results.

Hybrid Distribution Transformer Based on an Existing Distribution Transformer and a Series-Connected Power Converter