Power supply assembly and switch assembly

Patent metadata

Field	Value
Publication number	US-11757302-B2
Application number	US-202217663548-A
Country	US
Kind code	B2
Filing date	May 16, 2022
Priority date	May 17, 2021
Publication date	Sep 12, 2023
Grant date	Sep 12, 2023

Abstract

A power supply assembly including a primary source connection, a secondary source connection, a load connection, a primary current supply route, a supply switch system, and a converter system. The supply switch system is electrically located in the primary current supply route, and adapted for disconnecting the primary source connection from the load connection, the supply switch system including a plurality of supply switch units connected in parallel, each of the supply switch units including a controllable semiconductor switch. The power supply assembly includes a series impedance system having at least one series impedance member, and adapted to provide a balancing voltage drop for each of the parallel connected supply switch units of the supply switch system, wherein the balancing voltage drop is in series with a corresponding supply switch unit.

First claim

The invention claimed is:

1. A power supply assembly comprising:
a primary source connection adapted to be connected electrically to a primary alternating current supply;
a secondary source connection adapted to be connected electrically to a secondary current supply;
a load connection adapted to be connected electrically to an alternating current load;
a primary current supply route electrically conductively connecting the primary source connection to the load connection, wherein the primary current supply route is adapted for supplying power from the primary source connection to the load connection;
a supply switch system electrically located in the primary current supply route, and adapted for disconnecting the primary source connection from the load connection, the supply switch system comprising a plurality of supply switch units connected in parallel, each of the supply switch units comprising a controllable semiconductor switch;
a converter system electrically connected between the secondary source connection and the load connection, and adapted for supplying power from the secondary source connection to the load connection during a first converter supply mode; and
a control system adapted to control the supply switch system and the converter system,
wherein the power supply assembly comprises a series impedance system which has at least one series impedance member and adapted to provide a balancing voltage drop for each of the parallel connected supply switch units of the supply switch system, wherein the series impedance system is in series with the supply switch system, and the balancing voltage drop is in a range of 30-400 mV at a nominal current of the supply switch unit, and
wherein the at least one series impedance member comprises at least one series inductance member,
wherein the supply switch system comprises at least one supply switch unit pair each of which comprises two parallel connected supply switch units of the supply switch system, and the series impedance system comprises a coupled inductor for each of the at least one supply switch unit pair such that each of the coupled inductors comprises a first series inductance member connected in series with one supply switch unit of the supply switch unit pair, and a second series inductance member connected in series with the other supply switch unit of the supply switch unit pair, wherein there is a inductive coupling between the first series inductance member and the second series inductance member.

2. The power supply assembly according to claim 1 , wherein the power supply assembly comprises:
a supply switch module system comprising a plurality of supply switch modules such that the supply switch system is accommodated in the plurality of supply switch modules; and
a converter module system comprising at least one converter module such that the converter system is accommodated in the at least one converter module.

3. The power supply assembly according to claim 2 , wherein the supply switch module system comprises a supply switch module for each supply switch unit such that each supply switch unit is accommodated in a corresponding supply switch module.

4. The power supply assembly according to claim 1 , wherein the control system is adapted to provide a centralized control of the supply switch system.

5. The power supply assembly according to claim 1 , wherein an inductance of the at least one series inductance member is in a range of 2-40 pH.

6. The power supply assembly according to claim 1 , wherein the inductive coupling between the first series inductance member and the second series inductance member is provided by a magnetic core common to the first series inductance member and the second series inductance member.

7. The power supply assembly according to claim 1 , wherein the power supply assembly comprises an impedance module system comprising at least one impedance module, and the coupled inductors of the series impedance system are accommodated in the at least one impedance module.

8. The power supply assembly according to claim 1 , wherein the at least one series impedance member comprises a series impedance member for each supply switch unit such that each supply switch unit is connected in series with a corresponding series impedance member.

9. The power supply assembly according to claim 6 , wherein the series impedance member for each supply switch unit comprises conductors electrically connecting the supply switch unit to the primary source connection and the load connection.

10. The power supply assembly according to claim 1 , wherein the controllable semiconductor switch of each of the supply switch units has a negative temperature coefficient of resistance.

11. A switch assembly comprising:
a supply switch system having an input and an output, and adapted to controllably provide an electrically conductive connection between the input and the output, and to disconnect said electrically conductive connection, the supply switch system comprising a plurality of supply switch units connected in parallel, each of the supply switch units comprising a controllable semiconductor switch;
a series impedance system having at least one series impedance member and being adapted to provide a balancing voltage drop for each of the parallel connected supply switch units of the supply switch system, wherein the series impedance system is in series with the supply switch system, and the balancing voltage drop is in a range of 30-400 mV at a nominal current of the supply switch unit; and
a plurality of supply switch modules such that the supply switch system is accommodated in the plurality of supply switch modules,
wherein the at least one series impedance member comprises at least one series inductance member,
wherein the supply switch system comprises at least one supply switch unit pair each of which comprises two parallel connected supply switch units of the supply switch system, and the series impedance system comprises a coupled inductor for each of the at least one supply switch unit pair such that each of the coupled inductors comprises a first series inductance member connected in series with one supply switch unit of the supply switch unit pair, and a second series inductance member connected in series with the other supply switch unit of the supply switch unit pair, wherein there is a inductive coupling between the first series inductance member and the second series inductance member.

12. The switch assembly according to claim 11 , wherein the plurality of supply switch modules comprises a supply switch module for each supply switch unit such that each supply switch unit is accommodated in a corresponding supply switch module.

Assignees

• Abb Schweiz Ag

Inventors

• Paatero Esa-Kai
• Antoniazza Alessandro
• Cogliati Matteo

Classifications

• H02J9/062 Primary

  for AC powered loads · CPC title

• H02M1/06

  Circuits specially adapted for rendering non-conductive gas discharge tubes or equivalent semiconductor devices, e.g. thyratrons, thyristors · CPC title

• H02M5/45

  using semiconductor devices only · CPC title

• H02J9/068

  Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection · CPC title

• H02J3/36

  Arrangements for transfer of electric power between AC networks via high-voltage DC [HVDC] links; Arrangements for transfer of electric power between generators and networks via HVDC links · CPC title