摘要:
Die Erfindung betrifft ein Verfahren zum Betreiben einer Asynchronmaschine (2) im Generatorbetrieb zum Einspeisen elektrischer Energie in ein erstes Netz (9a) mit einer ersten Frequenz und in ein zweites Netz (9b) mit einer zweiten Frequenz, wobei die erste Frequenz größer als die zweite Frequenz ist, und wobei die Asynchronmaschine (2) doppelt gespeist unter Verwendung eines Zweiquadranten-Umrichters (10) betrieben wird.
摘要:
The present application provides a doubly-fed induction generator system 100 for a multi-shaft gas turbine engine 10. The doubly-fed induction generator system 100 may include a first doubly-fed induction generator 110 in communication with a first shaft 45 of the multi-shaft gas turbine engine 10, a first rotor 130 of the first doubly-fed induction generator 100 in communication with a converter 160 via a first rotor bus 170, and a first breaker 180 on the first rotor bus 170. The first doubly-fed induction generator 110 acts as a generator or a motor depending in part upon the position of the first breaker 180.
摘要:
The invention relates to a method for controlling a wind turbine of the type including a rotor, a generator, a frequency converter, a control unit and means for connecting to a wind farm grid, using means for receiving a local voltage reference value (VREF) and a regulator (1) which calculates the reactive power to be generated (QT) as a function of the voltage error (?V), such that it can be operated over the entire voltage range. The system also includes: at least one saturator element (2, 6, 7) in which the reactive power to be generated is limited, whereby the limits (Q_MAX, Q_MIN, QC_MAX, QC_MIN, QS_MAX, QS_MIN) are calculated dynamically as a function of the voltage, this block outputting a reference reactive power of the wind turbine (Q_REF, QC_REF, Qs_REF); and an element (3) for calculating the actual limit of the active power (PMAX) as a function of the pre-limited reactive power (Q_REF, QS_REF) and the apparent power available at that moment.
摘要:
Die Erfindung betrifft ein Verfahren zum Versorgen einer Erregerwicklung eines Rotors eines Drehstromgenerators einer Anlage zum Erzeugen einer in ein Stromnetz einzuspeisenden Dreiphasenwechselspannung mit einem Erregerstrom. Die Erregerwicklung wird bei einer Abweichung einer Drehfrequenz des Rotors von einer Netzfrequenz des Stromnetzes mit einem gepulsten Erregerstrom versorgt.
摘要:
The invention describes a control arrangement (1) of a multiple-stator machine (2), comprising a frequency converter (20_1, 20_2) for each of the plurality of stators and a controller (1_1, 1_2) for each frequency converter (20_1, 20_2), wherein a controller (1_1, 1_2) of a frequency converter (20_1, 20_2) is realized to generate control signals (120_1, 120_2) for that frequency converter (20_1, 20_2) on the basis of current values (I abc1 , I abc2 ) relating to that stator, and to generate a compensation current value (I dq_comp1 , I dq_comp2 ) for a further controller (1_1, 1_2) on the basis of the received current values (I dq1 , I* dq1 , I dq2 , I* dq2 ) in the event of an open-circuit fault in a frequency converter (20_1, 20_2); to receive appropriate input signal (⊝ e ), a compensation current value (I dq_comp1 , I dq_comp2 ) from a further controller (1_1, 1_2); and to compute a voltage reference (V* dq1 , V* dq2 ) for a subsequent transform stage (11) and PWM stage (12) of the controller (1_1, 1_2) on the basis of the received current Values (I dq1 , I* dq1 , I dq2 , I* dq2 , I dq_comp1 , I dq_comp2 ) coming from the reference computation blocks (13, 14). The invention further describes a current control module (10) of a frequency converter controller (1_1, 1_2) of such a multi-stator machine (2); a multi-stator machine (2); and a method of performing fault-tolerant control of a multi-stator machine (2).
摘要:
A jet engine assembly includes a jet engine having at least one spool and a generator. The generator comprising a rotor and a stator, with the rotor being operably coupled to the at least one spool, and an electronic commutator controlling the rotation of a magnetic field of the rotor such that the electric motor generates electricity. Also, a method of generating electricity from a generator having a stator and a rotor, the method comprising controlling a rotation of a magnetic field to generate electricity.
摘要:
According to one embodiment, there is provided a variable-speed operation control apparatus of a hydroelectric power generation system including a power generator (3) interconnected to a power system (P) through a main circuit (11) and a water turbine (4) directly connected to the power generator (3). The apparatus includes a branch circuit (12) branched from the main circuit (11) and including a frequency converter (5) which performs conversion between an output frequency of the power generator (3) and a system frequency of the power system (P), wherein the power generator (3) is interconnected to the power system (P) through the branch circuit (12) when a flow rate of water is less than a fixed level.
摘要:
A drive system (100) has: a three-phase motor, having: a shaft, a first three-phase winding set (1), having: a three-phase stator winding (1a) for connection to a three-phase alternating voltage network (U, V, W) and a three-phase rotor winding (1b), which is coupled to the shaft in a mechanical, rotationally fixed manner, a second three-phase winding set (2), having: a three-phase stator winding (2a) for connection to the three-phase alternating voltage network (U, V, W) in such a manner that a rotary field is produced that runs in the opposite direction to a rotary field that is produced by means of the stator winding (1a) of the first winding set (1), and a three-phase rotor winding (2b), which is coupled to the shaft in a mechanical, rotationally fixed manner, a first inverter (3), which is coupled to the shaft in a mechanical, rotationally fixed manner and which is coupled electrically to the three-phase rotor winding (1b) of the first winding set (1), and a second inverter (4), which is coupled to the shaft in a mechanical, rotationally fixed manner and which is coupled electrically to the three-phase rotor winding (2b) of the second winding set (2), wherein the first inverter (3) and the second inverter (4) are electrically coupled in such a manner that electrical power can be transmitted between the inverters.
摘要:
The purpose of the invention is to reduce the contribution of wind power installations to frequency errors on the grid, and preferably to contribute to the elimination of such errors. Thus, the method involves the use of PID control and/or control with hysteresis so as to regulate the active power injected into the grid, in view of the deviation between a measured grid frequency and the nominal grid frequency.