Doubly fed induction generator using back-to-back PWM converters and its application to variable-speed wind-energy generation R Pena, JC Clare, GM Asher IEE Proceedings-Electric power applications 143 (3), 231-241, 1996 | 3755 | 1996 |

Overview of control systems for the operation of DFIGs in wind energy applications R Cárdenas, R Peña, S Alepuz, G Asher IEEE Transactions on Industrial Electronics 60 (7), 2776-2798, 2013 | 661 | 2013 |

A doubly fed induction generator using back-to-back PWM converters supplying an isolated load from a variable speed wind turbine R Pena, JC Clare, GM Asher IEE Proceedings-Electric Power Applications 143 (5), 380-387, 1996 | 589 | 1996 |

Sensorless vector control of induction machines for variable-speed wind energy applications R Cardenas, R Pena IEEE transactions on energy conversion 19 (1), 196-205, 2004 | 375 | 2004 |

Control of a switched reluctance generator for variable-speed wind energy applications R Cardenas, R Pena, M Perez, J Clare, G Asher, P Wheeler IEEE transactions on Energy conversion 20 (4), 781-791, 2005 | 336 | 2005 |

MRAS observer for sensorless control of standalone doubly fed induction generators R Cardenas, R Pena, J Proboste, G Asher, J Clare IEEE Transactions on Energy conversion 20 (4), 710-718, 2005 | 289 | 2005 |

Sensorless control of doubly-fed induction generators using a rotor-current-based MRAS observer R Pena, R Cardenas, J Proboste, G Asher, J Clare IEEE Transactions on Industrial electronics 55 (1), 330-339, 2008 | 266 | 2008 |

MRAS observers for sensorless control of doubly-fed induction generators R Cárdenas, R Peña, J Clare, G Asher, J Proboste IEEE Transactions on Power Electronics 23 (3), 1075-1084, 2008 | 250 | 2008 |

Control strategies for enhanced power smoothing in wind energy systems using a flywheel driven by a vector-controlled induction machine R Cardenas, R Pena, G Asher, J Clare IEEE Transactions on industrial electronics 48 (3), 625-635, 2001 | 174 | 2001 |

Power smoothing in wind generation systems using a sensorless vector controlled induction machine driving a flywheel R Cárdenas, R Peña, G Asher, J Clare IEEE transactions on energy conversion 19 (1), 206-216, 2004 | 172 | 2004 |

A cage induction generator using back to back PWM converters for variable speed grid connected wind energy system R Pena, R Cardenas, R Blasco, G Asher, J Clare IECON'01. 27th Annual Conference of the IEEE Industrial Electronics Society …, 2001 | 159 | 2001 |

Wind–diesel generation using doubly fed induction machines R Pena, R Cárdenas, J Proboste, J Clare, G Asher IEEE Transactions on Energy Conversion 23 (1), 202-214, 2008 | 155 | 2008 |

Stability analysis of a wind energy conversion system based on a doubly fed induction generator fed by a matrix converter R Cárdenas, R Peña, G Tobar, J Clare, P Wheeler, G Asher IEEE Transactions on Industrial Electronics 56 (10), 4194-4206, 2009 | 152 | 2009 |

Control of the reactive power supplied by a WECS based on an induction generator fed by a matrix converter R Cárdenas, R Peña, P Wheeler, J Clare, G Asher IEEE Transactions on Industrial Electronics 56 (2), 429-438, 2008 | 145 | 2008 |

Control system for unbalanced operation of stand-alone doubly fed induction generators R Pena, R Cardenas, E Escobar, J Clare, P Wheeler IEEE Transactions on Energy Conversion 22 (2), 544-545, 2007 | 143 | 2007 |

Nonlinear control strategies for cascaded multilevel STATCOMs D Soto, R Pena IEEE Transactions on Power Delivery 19 (4), 1919-1927, 2004 | 133 | 2004 |

Control strategies for power smoothing using a flywheel driven by a sensorless vector-controlled induction machine operating in a wide speed range R Cárdenas, R Peña, GM Asher, J Clare, R Blasco-Giménez IEEE Transactions on Industrial Electronics 51 (3), 603-614, 2004 | 132 | 2004 |

Vector controlled induction machines for stand-alone wind energy applications RS Pena, RJ Cardenas, GM Asher, JC Clare Conference Record of the 2000 IEEE Industry Applications Conference. Thirty …, 2000 | 111 | 2000 |

Sensorless control for a switched reluctance wind generator, based on current slopes and neural networks E Echenique, J Dixon, R Cárdenas, R Peña IEEE Transactions on Industrial Electronics 56 (3), 817-825, 2008 | 104 | 2008 |

Power smoothing using a flywheel driven by a switched reluctance machine R Cárdenas, R Peña, M Pérez, J Clare, G Asher, P Wheeler IEEE Transactions on Industrial Electronics 53 (4), 1086-1093, 2006 | 104 | 2006 |