Capacitor system
A capacitor system includes a first capacitor and a second capacitor, having essentially the same capacitance, and a current limiter. A first terminal of the first capacitor and a first terminal of the second capacitor are connectable to a first busbar. The second terminal of the first capacitor is coupled to a first terminal of the current limiter and the second terminal of the second capacitor is coupled to a second terminal of the current limiter. The current limiter has at least one third terminal connectable to a second busbar. The current limiter includes a first inductive element and a second inductive element having essentially the same inductance and being magnetically coupled with opposite polarity.
1. A capacitor system, comprising:
a first capacitor;
a second capacitor, the first capacitor and the second capacitor having essentially a same capacitance; and
a current limiter, wherein
a first terminal of the first capacitor and a first terminal of the second capacitor are connectable to a first busbar,
a second terminal of the first capacitor is coupled to a first terminal of the current limiter,
a second terminal of the second capacitor is coupled to a second terminal of the current limiter and
the current limiter includes at least one third terminal, a first inductive element and a second inductive element, the at least one third terminal being connectable to a second busbar and the first inductive element and the second inductive element having essentially a same inductance and being magnetically coupled with opposite polarity.
2. The capacitor system of claim 1 , wherein
a first terminal of the first inductive element is connected to the at least one third terminal of the current limiter and a second terminal of the first inductive element is connected to the first terminal of the current limiter; and
a first terminal of the second inductive element is connected to the second terminal of the current limiter and a second terminal of the second inductive element is connected to the at least one third terminal of the current limiter.
3. The capacitor system of claim 1 , wherein the capacitor system includes a group of capacitors connected in parallel, the group of capacitors including the first capacitor.
4. The capacitor system of claim 1 , wherein the capacitor system includes a group of capacitors connected in parallel, the group of capacitors including the second capacitor.
5. The capacitor system of claim 1 , wherein the first and second inductive elements are coupled air core coils.
6. The capacitor system of claim 1 , wherein the first and second inductive elements are planar windings.
7. The capacitor system of claim 6 , wherein the planar windings are arranged in separate layers of a printed circuit board.
8. The capacitor system of claim 1 , wherein the first and second capacitors are of the metalized film type.
9. A subsea electrical system comprising:
at least one capacitor system, the at least one capacitor system including the capacitor system of claim 1 , immersed in a pressure compensated oil volume contained within a vessel or enclosure.
10. The capacitor system of claim 2 , wherein the capacitor system includes a group of capacitors connected in parallel, the group of capacitors including the first capacitor.
11. The capacitor system of claim 2 , wherein the capacitor system includes a group of capacitors connected in parallel, the group of capacitors including the second capacitor.
12. The capacitor system of claim 3 , wherein the capacitor system includes a group of capacitors connected in parallel, the group of capacitors including the second capacitor.
13. The capacitor system of claim 10 , wherein the capacitor system includes a group of capacitors connected in parallel, the group of capacitors including the second capacitor.
14. The capacitor system of claim 2 , wherein the first and second inductive elements are coupled air core coils.
15. The capacitor system of claim 2 , wherein the first and second inductive elements are planar windings.
16. The capacitor system of claim 15 , wherein the planar windings are arranged in separate layers of a printed circuit board.
17. A subsea electrical system comprising:
at least one capacitor system, the at least one capacitor system including the capacitor system of claim 2 , immersed in a pressure compensated oil volume contained within a vessel or enclosure.
18. A subsea electrical system comprising:
at least one capacitor system, the at least one capacitor system including the capacitor system of claim 3 , immersed in a pressure compensated oil volume contained within a vessel or enclosure.
19. A subsea electrical system comprising:
at least one capacitor system, the at least one capacitor system including the capacitor system of claim 4 , immersed in a pressure compensated oil volume contained within a vessel or enclosure.