Table 3 comparison of inter-cluster balancing methods
Parameters | Proposed method | Negative sequence current | Zero sequence current |
|---|---|---|---|
Maximum current flowing in the converter | 65A | 80A | 70A |
Maximum current flowing from the converter to the grid | 55A | 80A | 48A |
Degree of unbalanced current injected to the grid | 13.8% | 50% | 0% |
Switching power losses Ps | 0.81Ps | Ps | 0.9Ps |
Maximum sub-module capacitor voltage variation | ±3% | ±7% | ±10% |