TY - JOUR T1 - Coordinated Direct Power Control of DFIG System Without Phase-Locked Loop Under Unbalanced Grid Voltage Conditions JO - IEEE Transactions on Power Electronics PY - 2015/07/07 AU - Nian H AU - Cheng P AU - Zhu ZQ ED - DO - DOI: 10.1109/TPEL.2015.2453127 VL - 31 IS - 4 SP - 2905 EP - 2918 Y2 - 2025/01/03 ER -