IEEE Electrification Magazine - September 2013 - 37
and interruption capability throughout the fault event. For
this test, the source inductance was 8 µH, and the test voltage was 800 Vdc, resulting in a di/dt of the fault current of
approximately 100 A/µs during the fault event, which is
50A/µs per SSPD. The current reached 4,800-A peak through
SSPD 1 before it was interrupted by the breaker. In the
same test, the current reached 5,020-A peak through SSPD
2 before it was interrupted by that breaker. The test results
show that the fault currents through the two solid-state circuit breakers remained balanced within 5% of each other.
SSPD Device Considerations
The trend in shipboard power distribution systems is to
transition to higher system voltage levels, which reduces
the amount of current required to distribute a given
amount of power. DC power systems with line voltages up
SSPD
Control Board
IGBT Gate IGBT Gate
Drive 1
Drive 2
= Fiber Optic Cable
Q1
dc + In
High-Current Pulse
dc +
Out
D1
Local Bus
Snubber
Bus
Snubber
Device
Snubber
dc − In
dc −
Out
SSPD 2
Output
Current
Q1
−
dc + In
Local Bus
Snubber
Bus
Snubber
dc + Out
D1
Bus Bar Short
+
HCPG
SSPD 1
Output
Current
Device
Snubber
dc − Out
dc − In
One-Pole IGBT-Based SSPD 2
Figure 8. DC interruption test setup for two IGBT-based parallel SSPDs-10,000 A.
HCPG
Pole 2
5,020-A Peak
4,800-A Peak
2,000 A/Major Division
IGCTs
Pole 1
0 ref.
1
100 µs/Major Division
Figure 9. A dc interruption test setup for two IGBT-based parallel
SSPDs-10,000 A.
Figure 10. The interruption current (10,000-A peak) of two parallelpole SSPDs.
IEEE Elec trific ation Magazine / s ep t em be r 2 0 1 3
37
Table of Contents for the Digital Edition of IEEE Electrification Magazine - September 2013
IEEE Electrification Magazine - September 2013 - Cover1
IEEE Electrification Magazine - September 2013 - Cover2
IEEE Electrification Magazine - September 2013 - 1
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IEEE Electrification Magazine - September 2013 - Cover3
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