MODIFIED CONTROLS FOR DOUBLY FED INDUCTION GENERATOR UNDER UNBALANCED VOLTAGE FOR TORQUE STABILITY CONTROLLER

This paper proposes a low-voltage ride-through (LVRT) technique for a doubly fed induction generator (DFIG) wind turbine (WT) system. With the proposed method, both shunt and series voltage-source converters employed, enable to compensate a voltage response of the system simultaneously during the gr[r]

13 Mathematical verification of the WT-level control TRANG 9 4.2 Controller coordination To illustrate the relation of pitch controller bandwidth region and the turbine torsional mode, th[r]

This proposed system has the following advantages: i) Simple and fast control, where only two voltage sensors are used. PI controller for feedback operation gives fast response and stable operation. The voltage could be stabilized at rated value within 40ms. ii) Low switc[r]

CONCLUSION This book chapter has presented a model and design of a deadbeat power control scheme for a doubly-fed induction generator using a deadbeat control theory and rotor current sp[r]

voltages at a predetermined level while the output currents are unbalanced and distorted. An appropriate predictive current controller which predicts in real time the module voltages, presents ac currents of the MMC based STATCOM that track their references with a small ripple. Consi[r]

(11.5)
and demonstrates that the torque response of the machine is uniform throughout the full speed range. The block diagram for the scalar-controlled induction drive is shown in Fig. 11.3 . The inverter DC- link voltage is obtained through rectification of the AC lin[r]

Nội dung Text: Summary of doctoral thesis: Improving the efficiency in using double fed induction machine in shaft generator system on shipboards MINSTRY OF EUCATION AND TRANING HANOI UNIVESITY TRANSPORT AND COMMUNICATIONS NGUYEN TRONG THANG IMPROVING THE EFFICIENCY IN USING DOUBLEFED INDUCTION MACH[r]

n a recent note Ortega and Espinosa SI presented a
globally stable controller for torque regulation of a complete induction
motor model with partial state feedback, i.e., no assumption of flux
measurement. The result was established under the assumptions that
both the desired and load torques are co[r]

A novel control scheme for power converters of doubly-fed induction generator (DFIG) wind turbine system has been proposed to mitigate the current oscillations due to grid voltage unbalance. With this proposed scheme, the current controller is designed in the synchronous reference frame and composed[r]

In this paper, the application of a series grid-side converter (SEGSC) connected to a wind-turbine-driven doubly fed induction generator (DFIG) is introduced. The setup allows the wind turbine system an uninterruptible fault ride-through of voltage dips. The SEGSC can compensate the faulty line volt[r]

This paper proposes a control method of pulse-width modulation (PWM) converters for permanent magnet synchronous generator (PMSG) small wind turbines under distorted grid voltages. The DC-link voltage can be controlled at the machine-side converter (MSC), while the grid-side converter (GSC) controls[r]

IN THE PROPOSED SCHEME, A THREE-LAYER FEEDFORWARD NEURAL NETWORK RECEIVES THE COMMAND VOLTAGE AND ANGLE INFORMATION AT THE INPUT AND GEN-ERATES SYMMETRICAL PULSEWIDTH MODULATION WAVES FO[r]

This paper proposes a distributed device that could compensate reactive power by centralized control. This device only manipulates a controller for a capacitor system and loads. The controller collects the data of current, voltage, and power in each of the load branches in order to adjust total reac[r]

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 Container controls can contain other controls.
 One of the main uses of container controls, is that the visibility of a group of controls can be changed at one point by placing them in a container control, and setting the property of the contai[r]

Example: Estimate cell temperature, open-circuit voltage, and maximum power output for the 10W BP-SX10 module under conditions of 1-sun insolation and ambient temperature 27◦C.. If one c[r]

We have assumed that the permanent magnet generator torque is proportional to the machine current; the control structure allows the torque and rotational speed to be controlled.. TRANG 6[r]

Voltage sensing Excitation power source Turbine generator De-excitation Protective relays Field current limiter Overexcitation limiter OEL Voltage sensing and compensation Underexcitatio[r]

As is the case for D-galacturonic acid, no alc gene induction could be observed in mycelia grown on lactose/ putrescine although thegabAgene is expressed under these growth conditions re[r]

Tóm tắt
Bài báo này trình bày một phương pháp điều khiển mới cho hệ thống phục hồi điện áp động để giảm thiểu
lõm điện áp trên lưới điện. Trong phương pháp này một cấu trúc điều khiển vector được xây dựng trên hệ tọa
độ tĩnh αβ với tổ hợp của bộ điều khiển trượt DSMC (DiscreteTime Sliding Mode[r]

If Mrg19p is required for efficient transcription from the GAL1 promoter under low induction signal, why should over-expression lead to a decrease in galactokinase activity in a wild-type[r]