Table 2: The setting values of parameters (sampling frequency of protection device: 5 kHz).

Protection typesParametersSetting values

Start componentProtection startup setting value (kV)0.1
DC bus protectionDifferential current setting value (kA)0.5
DC line protection
 Line 1 (CB2, CB4)Instantaneous current setting value (kA)2.5
Time-limit current setting value (kA)0.6
Delay setting value (s)0.1
Reverse current margin (kA)0.05
 Line 2 (CB5)Instantaneous current setting value (kA)1.3
Time-limit current setting value (kA)0.7
Delay setting value (s)0.1
 Line 3 (CB6)Instantaneous current setting value (kA)1.2
Time-limit current setting value (kA)0.7
Delay setting value (s)0.1
 Line 4 (CB7)Instantaneous current setting value (kA) 1.4
Time-limit current setting value (kA)0.7
Delay setting value (s)0.1
 The outlet of rectifier (CB3)Reverse current margin (kA)0.05