Investigation on Common-Mode Voltage Suppression in Smart Transformer-Fed Distributed Hybrid Grids

Overload Control in Smart Transformer-Fed Grid

Renewable energy resources and new loads—such as electric vehicles—challenge grid management. Among several scenarios, the smart transformer represents a solution for simultaneously managing lowand medium-voltage grids, providing ancillary services to the distribution grid. However, unlike conventional transformers, the smart transformer has a very limited overload capability, because the junct...

Analysis and Suppression of Common Mode Interference in Three- Phase Power Rectifier Unit Based on Common Mode Transformer

Power rectifier unit can realize converting current by use of three-phase synchronous rectification bridge. The multiple parallel power units can amplify the capability of single generator and it is invaluable in battery charge, welding machine and electrochemistry fields. Nevertheless, the electromagnetic interference (EMI) which results from the speedy switch of power devices would affect the...

Hybrid filter with CPPM for Suppression of Common Mode Voltage and Differential Mode Harmonics in Three Phase PV Inverter

In Pulse Width Modulation (PWM) Inverters, the peaks of output Common Mode Voltage (CMV) are very high due to the instantaneous imbalance of 3Phase Voltages. The CMV will produce a huge pulsating Common Mode Current (CMC) through the distributed capacitance of the system and will cause the high shaft voltage leads to damage of the motor bearing. The CMC could interfere with the adjacent devices...

Telecommunication requirements in low-voltage smart grids

Modeling and Analysis of the Common Mode Voltage in a Cascaded H-Bridge Electronic Power Transformer

Electronic power transformers (EPTs) have been identified as emerging intelligent electronic devices in the future smart grid, e.g., the Energy Internet, especially in the application of renewable energy conversion and management. Considering that the EPT is directly connected to the medium-voltage grid, e.g., a10 kV distribution system, and its cascaded H-bridges structure, the common mode vol...