What synchronous generator synchronous speed is how to determine

 Generator is the heart of the power plant equipment, according driven power generators can be divided into hydro (water) and turbine (steam). This book relates is intended to mean synchronous generator (limited vertical turbine generator). In normal operation, the generator, the generator rotor air band to band with the synthetic magnetic field of a rotating, the magnetic field generated by the synthesis of the two magnetic fields: the rotor and stator magnetic field. The so-called "synchronous" generator, meaning the generator rotor speed magnetic field (the original motives) and the stator field speed (power system frequency is determined) are equal. ??? Magnetic field generated by the rotation of the rotor has a direct current through the rotor windings (pole) generated magnetic field rotational speed of the rotor is the rotor speed, that speed the entire unit. A prime mover driven rotor speed is adjusted by the UNIT, the rotational speed on the generator nameplate are clearly marked. Stator of the rotating magnetic field generated by currents through the three-phase symmetrical three-phase stator windings (120 ° symmetry by arrangement), the speed is determined by the formula (wherein: p is the number of rotor pole pairs; f for the power system frequency; n is set speed) . It is seen from the formula, for a particular generator, its number of pole pairs is fixed, and the frequency of the power system is fixed, namely 50Hz (also known as frequency), showing each specific generator The stator rotating magnetic field generator manufactured after is the "value." Of course, the frequency of the power system is not really stable in the theoretical value of 50Hz, but allows up and down the value of a slight fluctuations, that the stator magnetic field is actually in operation around the rated speed value of dynamic change. The rotor and the stator magnetic field to synchronize must adapt to this change, that speed unit for dynamic adjustment. If the speed is not consistent with the stator field, then we say that the generator "out of step" a. 0871-7352758 0871-7352768 0871-8048885 4000800458 13888121885 www.jsxgzg.com