ELECTRIC PLANT WITH CAPACITY TO CHARGE ELECTRIC BATTERIES
First Claim
1. An electric plant with a capacity to charge electric batteries, characterized in thatit is a plant for transmitting electric power comprising a Voltage Source Converter, an alternating voltage network connected to an alternating voltage side of the converter the Voltage Source Converter having at least one phase leg connected to opposite poles of a direct voltage side of the converter and comprising a series connection of switching cells, each said switching cell having on one hand at least two semiconductor assemblies connected in series and having each a semiconductor device of turn-off type and a free-wheeling diode connected in parallel therewith and on the other at least one energy storing capacitor as well as two terminals connecting the cell to adjacent cells in said series connection of switching cells, a point of said series connection of switching cells forming a phase output connected to said alternating voltage side of the converter, in which the converter comprises an arrangement configured to control said semiconductor devices of each switching cell so that each said switching cell will obtain one of at least two switching states, namely a first switching state and a second switching state, in which the voltage across said at least one energy storing capacitor and a zero-voltage, respectively, is supplied across said two terminals of the switching cell, for obtaining a determined alternating voltage on said phase output,at least one of said switching cells is provided with means configured to connect at least one electric battery in parallel with said at least one capacitor thereof, andsaid control arrangement is configured to be able to carry out said control so as to influence the charging state of said at least one electric battery connected to said at least one switching cell.
1 Assignment
0 Petitions
Accused Products
Abstract
An electric plant with a capacity to charge electric batteries is a plant for transmitting electric power including a Voltage Source Converter, an alternating voltage network connecting an alternating voltage side of the converter and a direct voltage part connected to the direct voltage side of the converter. The converter has a series connection of switching cells having each at least one energy storing capacitor. Electric batteries may be connected in parallel with the capacitor, and the charging state thereof may be influenced by controlling the switching cells of the Voltage Source Converter through a control arrangement.
13 Citations
19 Claims
-
1. An electric plant with a capacity to charge electric batteries, characterized in that
it is a plant for transmitting electric power comprising a Voltage Source Converter, an alternating voltage network connected to an alternating voltage side of the converter the Voltage Source Converter having at least one phase leg connected to opposite poles of a direct voltage side of the converter and comprising a series connection of switching cells, each said switching cell having on one hand at least two semiconductor assemblies connected in series and having each a semiconductor device of turn-off type and a free-wheeling diode connected in parallel therewith and on the other at least one energy storing capacitor as well as two terminals connecting the cell to adjacent cells in said series connection of switching cells, a point of said series connection of switching cells forming a phase output connected to said alternating voltage side of the converter, in which the converter comprises an arrangement configured to control said semiconductor devices of each switching cell so that each said switching cell will obtain one of at least two switching states, namely a first switching state and a second switching state, in which the voltage across said at least one energy storing capacitor and a zero-voltage, respectively, is supplied across said two terminals of the switching cell, for obtaining a determined alternating voltage on said phase output, at least one of said switching cells is provided with means configured to connect at least one electric battery in parallel with said at least one capacitor thereof, and said control arrangement is configured to be able to carry out said control so as to influence the charging state of said at least one electric battery connected to said at least one switching cell.
-
16. A station for charging batteries used for the propulsion of electric or hybrid vehicles, characterized in that
it comprises Voltage Source Converter having at least one phase leg connected to opposite poles of a direct voltage side of the converter and comprising a series connection of switching cells, each said switching cell having on one hand at least two semiconductor assemblies connected in series and having each a semiconductor device of turn-off type and a free-wheeling diode connected in parallel therewith and on the other at least one energy storing capacitor as well as two terminals connecting the cell to adjacent cells in said series connection of switching cells, a point of said series connection of switching cells forming a phase output connected to an alternating voltage network through an alternating voltage side of the converter, in which the converter comprises an arrangement configured to control said semiconductor devices of each switching cell so that each said switching cell will obtain one of at least two switching states, namely a first switching state and a second switching state, in which the voltage across said at least one energy storing capacitor and a zero-voltage, respectively, is supplied across said two terminals of the switching cell, for obtaining a determined alternating voltage on said phase output, at least one of said switching cells is provided with means configured to connect at least one electric battery in parallel with said at least one capacitor thereof, and said control arrangement is configured to be able to carry out said control so as to influence the charging state of said at least one electric battery connected to said at least one switching cell.
-
19. Use of a plant for transmitting electric power for charging electric batteries characterized in that
it is a plant for transmitting electric power comprising a Voltage Source Converter, an alternating voltage network connected to an alternating voltage side of the converter, the Voltage Source Converter having at least one phase leg connected to opposite poles of a direct voltage side of the converter and comprising a series connection of switching cells, each said switching cell having on one hand at least two semiconductor assemblies connected in series and having each a semiconductor device of turn-off type and a free-wheeling diode connected in parallel therewith and on the other at least one energy storing capacitor as well as two terminals connecting the cell to adjacent cells in said series connection of switching cells, a point of said series connection of switching cells forming a phase output connected to said alternating voltage side of the converter, in which the converter comprises an arrangement configured to control said semiconductor devices of each switching cell so that each said switching cell will obtain one of at least two switching states, namely a first switching state and a second switching state, in which the voltage across said at least one energy storing capacitor and a zero-voltage, respectively, is supplied across said two terminals of the switching cell, for obtaining a determined alternating voltage on said phase output, at least one of said switching cells is provided with means configured to connect at least one electric battery in parallel with said at least one capacitor thereof, and said control arrangement is configured to be able to carry out said control so as to influence the charging state of said at least one electric battery connected to said at least one switching cell.
Specification