Three-phase energy storage inverter common mode voltage

What is a three phase inverter?

Consider a three-phase inverter supplied from a single DC source and connected to a three-phase load. In the three-phase inverter, the common-mode voltage can be measured between the load neutral point and the general ground. It can be expressed as the mean of the three output voltages measured at the respective phase with respect to common ground.

What is common mode voltage?

This voltage difference in inverters is referred to as common-mode voltage. Consider a three-phase inverter supplied from a single DC source and connected to a three-phase load. In the three-phase inverter, the common-mode voltage can be measured between the load neutral point and the general ground.

How to reduce common-mode voltage in a three-phase inverter?

In three-phase inverters, modifying the topology by adding a fourth leg is suitable for reducing the common-mode voltage. Utilizing dual bridge inverters is also a reduction method used for common-mode voltage in conventional inverters. These reduction techniques are based on hardware circuitry.

What are common-mode voltages in energy storage system-based inverters?

The common-mode voltages in energy storage system-based inverters are capable of causing leakage currents and faulty activation of detection units. Because common-mode voltages in inverters can cause so much damage, it is necessary to employ common-mode voltage reduction techniques for the extended operation of machinery.

Can a voltage source inverter handle a three-phase electric machine?

Nowadays, voltage source inverters (VSIs), along with speed drive controllers, are widely utilised to handle the three-phase electric machines. In all balanced three-phase electric machines with sinusoidal excitations, the summation of phase-to-neutral voltages with Y connection is achieved to be zero in time-domain analysis .

Is a three-phase two-level inverter based on a switched-capacitor voltage multiplier?

Abstract: This paper introduces a new three-phase two-level inverter based on the switched-capacitor voltage multiplier. By adding a voltage multiplier network at the DC side of the traditional three-phase inverter topology, the DC-link voltage of the introduced inverter is stepped up to triple of the input voltage.