Apparatus for the voltage maintenance of an electrical AC voltage supply network and method for operating such an apparatus
First Claim
1. An apparatus for the voltage maintenance of an electrical AC voltage supply network (1) with a partial converter system (2), which has a first branch pair (13) and a second branch pair (14) connected in parallel therewith and an electrical energy store (4) connected in parallel with the branch pairs (13, 14), each branch pair (13, 14) being formed from two series-connected driveable power semiconductor switches with in each case a diode reverse-connected in parallel with each power semiconductor switch, and the junction point of the power semiconductor switches of the first branch pair (13) forming a first terminal (9) of the partial converter system (2) and the junction point of the power semiconductor switches of the second branch pair (14) forming a second terminal (5) of the partial converter system (2), characterized in that the partial converter system (2) has a third branch pair (3) formed from two series-connected driveable power semiconductor switches with in each case a diode reverse-connected in parallel with each power semiconductor switch, the third branch pair (3) being connected in parallel with the first and second branch pairs (13, 14), and in that the junction point of the power semiconductor switches of the third branch pair (3) forms a third terminal (18) of the partial converter system (2).
1 Assignment
0 Petitions
Accused Products
Abstract
An apparatus for the voltage maintenance of an electrical AC voltage supply network (1) is specified, which comprises a partial converter system (2), which has a first branch pair (13) and a second branch pair (14) connected in parallel therewith and an electrical energy store (4) connected in parallel with the branch pairs (13, 14), each branch pair (13, 14) being formed from two series-connected driveable power semiconductor switches with in each case a diode reverse-connected in parallel with each power semiconductor switch, and the junction point of the power semiconductor switches of the first branch pair (13) forming a first terminal (9) of the partial converter system (2) and the junction point of the power semiconductor switches of the second branch pair (14) forming a second terminal (5) of the partial converter system (2). The partial converter system (2) has a third branch pair (3) formed from two series-connected driveable power semiconductor switches with in each case a diode reverse-connected in parallel with each power semiconductor switch, the third branch pair (3) being connected in parallel with the first and second branch pairs (13, 14), and the junction point of the power semiconductor switches of the third branch pair (3) forms a third terminal (18) of the partial converter system (2). Furthermore, a method for operating the apparatus is specified.
11 Citations
36 Claims
-
1. An apparatus for the voltage maintenance of an electrical AC voltage supply network (1) with a partial converter system (2), which has a first branch pair (13) and a second branch pair (14) connected in parallel therewith and an electrical energy store (4) connected in parallel with the branch pairs (13, 14), each branch pair (13, 14) being formed from two series-connected driveable power semiconductor switches with in each case a diode reverse-connected in parallel with each power semiconductor switch, and the junction point of the power semiconductor switches of the first branch pair (13) forming a first terminal (9) of the partial converter system (2) and the junction point of the power semiconductor switches of the second branch pair (14) forming a second terminal (5) of the partial converter system (2),
characterized in that the partial converter system (2) has a third branch pair (3) formed from two series-connected driveable power semiconductor switches with in each case a diode reverse-connected in parallel with each power semiconductor switch, the third branch pair (3) being connected in parallel with the first and second branch pairs (13, 14), and in that the junction point of the power semiconductor switches of the third branch pair (3) forms a third terminal (18) of the partial converter system (2).
-
19. A method for operating an apparatus for the voltage maintenance of an electrical AC voltage supply network (1), in which, in the event of a fall in voltage of a voltage source (19) of the electrical AC voltage supply network (1), said voltage source being connected to the partial converter system (2), the partial converter system (2) is driven in such a way that essentially the rated voltage of the voltage source (19) is established at a first terminal (9) of the partial converter system (2), the partial converter system (2) having a first branch pair (13) and a second branch pair (14) connected in parallel therewith and an electrical energy store (4) connected in parallel with the branch pairs (13, 14), and each branch pair (13, 14) being formed from two series-connected driveable power semiconductor switches with in each case a diode reverse-connected in parallel with each power semiconductor switch, and the junction point of the power semiconductor switches of the first branch pair (13) forming a first terminal (9) of the partial converter system (2) and the junction point of the power semiconductor switches of the second branch pair (14) forming a second terminal (5) of the partial converter system (2),
characterized in that the first branch pair (13) and the second branch pair (14) are driven in such a way that essentially the rated voltage of the voltage source (19) is set at the first terminal (9), and in that the second branch pair (14) and a third branch pair (3) of the partial converter system (2), which is formed from two series-connected driveable power semiconductor switches with in each case a diode reverse-connected in parallel with each power semiconductor switch and is connected in parallel with the first and second branch pairs (13, 14), the junction point of the power semiconductor switches of the third branch pair (3) forming a third terminal (18) of the partial converter system (2), are driven in such a way that the electrical energy store (4) is charged by the voltage source (19).
Specification