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Wind Energy Management Part 11

Tham khảo tài liệu 'wind energy management part 11', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Modeling and Designing a Deadbeat Power Control for Doubly-Fed Induction Generator 121 link voltage and this one can be controlled by a current control presented by Rodríguez et al. 2005 . The Deadbeat power control block diagram is shown in Figure 3 and a detailed block diagram of the deadbeat power control implementation is shown in Figure 4. DIFG GRID Fig. 3. Deadbeat power control diagram for DFIG. Fig. 4. Detailed deadbeat power control algorithm. 122 Wind Energy Management Stator currents and voltages rotor speed and currents are measured to stator flux position and magnitude synchronous frequency and slip frequency estimation. 4.3 Estimation The stator flux estimation in stationary reference frame ap is given by Kp f fem1apdt f V p - R1hap dt 44 The position of stator flux is estimated by using the trigonometric function and it is given by . tg-1 T Ì 45 k 1a The synchronous speed a1 estimation is given by d3s v1p - R1i1p f1a - v1a - R1i 1a 1p 46 and the slip speed estimation using the rotor speed and the synchronous speed is sl 1 - NP mec 47 The angle in rotor reference frame is . - Õr Ị sldt 48 5. Experimental results The deadbeat power control strategy was implemented with a Texas Instruments DSP TMS320F2812 platform which also has a T 400us. The system consists of a three-phase voltage source inverter with insulated-gate bipolar transistors IGBTs and the three-phase doubly-fed induction generator and its parameters are shown in the appendix. The rotor voltage commands are modulated by using symmetrical space vector PWM with switching frequency equal to 2.5 kHz. The DC bus voltage of the inverter is 36 V. The stator voltages and currents are sampled in the frequency of 2.5 kHz. The encoder resolution is 3800 pulses per revolution. The algorithm of the deadbeat control was programmed on the Event Manager 1 of the Texas Instruments DSP TMS320F2812 platform and its flowchart is presented in Figure 5. The schematic of the implementation of the experimental .