MULTILEVEL CONVERTER
First Claim
1. A power converter, comprising:
- at least one leg operatively coupled between a first bus and a second bus, wherein the at least one leg comprises;
a first string comprising a plurality of non-controllable semiconductor switches, a first node, a second node, and a third node, wherein the first node is coupled to a third bus;
one or more second strings, wherein each of the one or more second strings comprises at least one fully controllable semiconductor switch, and wherein one of the second strings is operatively coupled between the first node and the third bus and another second string is operatively coupled between the second node and the third node; and
one or more third strings, wherein each of the one or more third strings comprises at least one energy storage device, and wherein each of the one or more third strings is operatively coupled to the first string, the one or more second strings, or a combination thereof.
2 Assignments
0 Petitions
Accused Products
Abstract
A power converter is presented. The power converter includes at least one leg operatively coupled between a first bus and a second bus and includes a first string including a plurality of non-controllable semiconductor switches, a first node, a second node, and a third node, where the first node is coupled to a third bus, one or more second strings, where each of the one or more second strings includes at least one fully controllable semiconductor switch, and where one of the second strings is coupled between the first node and the third bus and another second string is coupled between the second node and the third node, and one or more third strings, where each of the one or more third strings includes at least one energy storage device and is coupled to the first string, the one or more second strings, or a combination thereof.
-
Citations
23 Claims
-
1. A power converter, comprising:
at least one leg operatively coupled between a first bus and a second bus, wherein the at least one leg comprises; a first string comprising a plurality of non-controllable semiconductor switches, a first node, a second node, and a third node, wherein the first node is coupled to a third bus; one or more second strings, wherein each of the one or more second strings comprises at least one fully controllable semiconductor switch, and wherein one of the second strings is operatively coupled between the first node and the third bus and another second string is operatively coupled between the second node and the third node; and one or more third strings, wherein each of the one or more third strings comprises at least one energy storage device, and wherein each of the one or more third strings is operatively coupled to the first string, the one or more second strings, or a combination thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
12. A system for power conversion, comprising:
-
a first power converter; a direct current link operatively coupled to the first power converter and comprising one or more direct current link capacitors operatively coupled in series; a second power converter operatively coupled to the first power converter via a first bus and a second bus, wherein the second power converter comprises; at least one leg operatively coupled between the first bus and the second bus, wherein the at least one leg comprises; a first string comprising a plurality of non-controllable semiconductor switches; one or more second strings, wherein each of the one or more second strings comprises at least one fully controllable semiconductor switch; one or more third strings, wherein each of the one or more third strings comprises at least one energy storage device, and wherein each of the one or more third strings is operatively coupled to the first string, the one or more second strings, or a combination thereof; and a pre-charging unit configured to charge the at least one energy storage device in the one or more third strings and the one or more direct current link capacitors in the direct current link. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
-
-
20. A method for power conversion, comprising:
-
pre-charging a direct current link capacitor and at least one energy storage device of a power converter during an initial state of the power converter, wherein the power converter comprises; at least one leg operatively coupled between a first bus and a second bus, wherein the at least one leg comprises; a first string comprising a plurality of non-controllable semiconductor switches; one or more second strings, wherein each of the one or more second strings comprises at least one fully controllable semiconductor switch; one or more third strings, wherein each of the one or more third strings comprises the at least one energy storage device, and wherein each of the one or more third strings is operatively coupled to the first string, the one or more second strings, or a combination thereof; operatively coupling the power converter to a grid; selectively switching the at least one fully controllable semiconductor switch in the one or more second strings of the power converter; and generating a multilevel voltage based on the selective switching of the at least one fully controllable semiconductor switch. - View Dependent Claims (21, 22, 23)
-
Specification