| 摘要 |
<p>A protection system for an electrical variable speed doubly fed induction machine having a multi-phase rotor, comprising star-connected resistors (Rc), one end of each resistor being connected to a respective phase of the rotor and the other end of the resistors being commonly connected to provide an artificial neutral point (ANP), and a rotor earth fault protection module (REFI) connected to said artificial neutral point to perform voltage injection.</p> |
