| 摘要 |
<p>A speed-adjustable synchronous generator unit, including a synchronous generator (1) and a control system (2). The synchronous generator (1) includes a rotor (11) and a stator (12), wherein a stator coil is connected to an external power grid (4) for outputting or receiving electric energy, and the rotor (11) has two rotor coils (111, 112) arranged with an electrical angle difference in space of a which are connected to the control system (2) after being led out in a conventional manner. A power input (5) of the control system (2) is connected to the power grid (4) and an output thereof is connected to the two rotor coils (111, 112) separately, forming two alternating current excitation voltages (6). The angular frequencies of the two alternating current excitation voltages (6) are both ?f = ?s - ?m and the current phase difference of the rotor coils (111, 112) is (p - a), wherein ?s is the angular frequency of the power grid (4) and ?m is the electrical angular velocity of the rotor (11). Two alternating current excitation currents form a rotating magnetic field, with the rotating speed thereof being a synchronous speed relative to the stator (12), i.e. the angular frequency ?s of the power grid (4). The speed-adjustable synchronous generator unit has a wide speed adjustment range, and if it is used as a wind driven generator, the suitable wind range can be expanded, and the gear box for increasing speed can be removed, improving the utilization rate of the wind energy.</p> |
