Abstract:
PROBLEM TO BE SOLVED: To provide a switchgear cell which stores as little electrical energy as possible during its operation and can be designed in a space-saving manner. SOLUTION: A switchgear cell has a group 1 of connection, the group of connection having a first and a second controllable bidirectional power semiconductor switch 2, 3 and a capacitor 25. The group of connection can have a third, fourth, fifth, and sixth controllable bidirectional power semiconductor switch 4, 5, 6, 7 and the first controllable bidirectional power semiconductor switch 2 can be connected back-to-back in series with the second controllable bidirectional power semiconductor switch 3, the third controllable bidirectional power semiconductor switch 4 can be connected back-to-back in series with the fourth controllable bidirectional power semiconductor switch 5. The capacitor 25 can be connected to the connection point of the first controllable bidirectional power semiconductor switch 2 to the second controllable bidirectional power semiconductor switch 3. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
The present invention is concerned with a converter control unit or power system stabilizing unit for counteracting oscillations in electric power systems (1) that is equipped and employed to provide and processes information for system-wide monitoring, protection, control and metering. It comprises means (30) for synchronized (e.g. via GPS or another absolute/global time reference) sampling of voltages and/or currents, means for down-sampling in order to decrease the number of samples, and means (35) for calculating phasors, i.e. time stamped amplitude and phase angle of the voltages and/or currents.
Abstract:
The invention relates to a voltage changer circuit for switching a multitude of turn-on voltage levels at which for each phase (R, S, T), a first switching group (1) or, alternatively, n additional first switching groups (1.1,..., 1.n) are provided, n being = 1. In order to reduce the stored energy of the voltage changer circuit and to increase the indifference to and reduce losses, a second switching group (5) and a third switching group (6) are provided, each being constituted by a first gate turn-off switch (7, 8) with passive uncontrolled electronic component with unidirectional current flow direction, connected in an anti-parallel manner, and a second gate turn-off switch (9, 10) with a passive uncontrolled electronic component with unidirectional current flow direction, connected in an anti-parallel manner, by a capacitor (4, 14) and by a relief network (11, 12). The second switching group (5) is connected to the first controlled bidirectional power semiconductor switch (2) of the first switching group (1) and the third switching group (6) is connected to the second controlled bidirectional power semiconductor switch (3) of the first switching group (1). The circuit also has a first protective device (15) and a second protective device (16).
Abstract:
A converter circuit for switching a large number of switching voltage levels is specified, in which a first switching group is provided for each. Second switching groups are provided, each having a first, second, third, fourth, fifth and sixth drivable bidirectional power semiconductor switch and capacitor. The first drivable bidirectional power semiconductor switch is reverse-connected in series with the second drivable bidirectional power semiconductor switch, the third drivable bidirectional power semiconductor switch is reverse-connected in series with the fourth drivable bidirectional power semiconductor switch, the first drivable bidirectional power semiconductor switch is connected to the capacitor, the third drivable bidirectional power semiconductor switch is connected to the capacitor, the fifth drivable bidirectional power semiconductor switch is directly connected to the fourth drivable bidirectional power semiconductor switch, and the sixth drivable bidirectional power semiconductor switch is directly connected to the second drivable bidirectional power semiconductor switch.
Abstract:
The switchgear cell (10) has a group of connection (1) provided with serially connected controllable bidirectional power semiconductor switches (2,3) to which another set of controllable bidirectional power semiconductor switches is connected back-to-back in series. The controllable bidirectional power semiconductor switches (2,4) are connected to the connection point of the capacitors (8,9). An independent claim is included for converter circuit.
Abstract:
A converter circuit is disclosed for switching of a multiplicity of switching voltage levels, which have n first switching groups for each phase (R, S, T), with the n-th first switching group being formed by a first drivable bidirectional power semiconductor switch and a second drivable bidirectional power semiconductor switch, and with the first switching group to the (n-1)-th switching group each being formed by a first drivable bidirectional power semiconductor switch and a second drivable bidirectional power semiconductor switch, and by a capacitor which is connected to the first and second drivable bidirectional power semiconductor switches with each of the n first switching groups being connected in a linked form to the respectively adjacent first switching group, and with the first and the second drivable bidirectional power semiconductor switches in the first switching group being connected to one another.
Abstract:
The device has switching assemblies (1.1-1.n, 8.1-8.p, 9.1-9.p, 10.1-10.p), where the switching assemblies (1.1-1.n) have bidirectional power semiconductor switches (2, 3, 4, 5). The switching assemblies (8.1, 9.1, 10.1) are connected with the bidirectional power semiconductor switches (2, 5, 3), respectively. The switching assemblies (8.p, 9.p, 10.p) have capacitors (17, 18, 19) that are serially connected with each other.
Abstract:
The switchgear cell (10) has a group of connection (1) provided with serially connected controllable bidirectional power semiconductor switches (2,3) to which another set of controllable bidirectional power semiconductor switches is connected back-to-back in series. The controllable bidirectional power semiconductor switches (2,4) are connected to the connection point of the capacitors (8,9). An independent claim is included for converter circuit.
Abstract:
A converter circuit for switching a large number of switching voltage levels is specified, in which a first switching group is provided for each. Second switching groups are provided, each having a first, second, third, fourth, fifth and sixth drivable bidirectional power semiconductor switch and capacitor. The first drivable bidirectional power semiconductor switch is reverse-connected in series with the second drivable bidirectional power semiconductor switch, the third drivable bidirectional power semiconductor switch is reverse-connected in series with the fourth drivable bidirectional power semiconductor switch, the first drivable bidirectional power semiconductor switch is connected to the capacitor, the third drivable bidirectional power semiconductor switch is connected to the capacitor, the fifth drivable bidirectional power semiconductor switch is directly connected to the fourth drivable bidirectional power semiconductor switch, and the sixth drivable bidirectional power semiconductor switch is directly connected to the second drivable bidirectional power semiconductor switch.