General Electric Company

Luis José Garcés Rivera

Di Zhang

Ravisekhar Nadimpalli Raju

Rixin Lai

Ruediger Soeren Kusch

Andrew Allen Rockhill

Chunchun Xu

A power converter includes at least one leg with a first string including a plurality of controllable semiconductor switches, a first connecting node, and a second connecting node, wherein the first string is operatively coupled across a first bus and a second bus. The at least one leg also includes a second string operatively coupled to the first string via the first connecting node and the second connecting node, wherein the second string includes a plurality of switching units. The first string includes a first branch and a second branch, wherein the second branch is operatively coupled to the first branch via a third connecting node and the third connecting node is coupled to a ground connection.

Grounding scheme for modular embedded multilevel converter

A multilevel converter includes at least one phase. Each phase of the multilevel converter includes a direct current (DC) link, a first circuit, a second circuit, and a phase capacitor. The DC link includes a first capacitor, a second capacitor, and a third capacitor situated between the first and second capacitors. The first circuit is electrically coupled to two terminals of the first capacitor. The second circuit is electrically coupled to two terminals of the second capacitor. The phase capacitor is electrically coupled between the first circuit and the second circuit.

Multilevel converter and topology method thereof

A multilevel converter includes at least one phase each including several cascaded basic units each including a first switching element, a second switching element, and a separate and electrically isolated DC source (SDCS). The SDCS is electrically coupled between the first switching element and the second switching element in each basic unit. Each of the adjacent pairs of the basic units are electrically crosswise coupled together by electrical coupling of the first switching element of a first basic unit of the two adjacent basic units to the second switching element of a second basic unit of the two adjacent basic units, and electrically coupling the second switching element of the first basic unit to the first switching element of the second basic unit.

A control system for controlling a multiphase power converter includes a current control module, a voltage control module and a current command selector. The current control module generates grid voltage command signals for the multiphase power converter and the voltage control module generates reference converter current command signals for the current control module. The current command selector supplies active and reactive current command signals from a supervisory controller to the current control module when the multiphase power converter is connected to the grid and supplies the reference converter current command signals to the current control module when the multiphase power converter is unconnected to the grid.

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Niskayuna, NY, United States of America

Luis José Garcés Rivera