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The Design and Realization on the Generator Side Converter Control System of Direct-driven Wind Power Generation

Author: YuHaoZan
Tutor: WangHui
School: Hunan University
Course: Electrical Engineering
Keywords: Direct-drive wind power Permanent magnet synchronous motors Parallel operation No speed sensor Back-to-back PWM converter
CLC: TM315
Type: Master's thesis
Year: 2009
Downloads: 814
Quote: 8
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Abstract


The high-power direct-drive wind power system is one of the most practical prospect of wind power generation system, the system control program generator can run in a wide speed range, without gearbox and electrical excitation device can achieve active , flexible control of reactive power. This paper around direct drive wind power generation system in parallel with the double PWM converter and its circulation control technology to conduct research. The paper first describes the basic structure of a direct-drive wind power system, established a mathematical model of the inverter and the mathematical model of permanent magnet synchronous generator, power converter circuit types and their characteristics, the analysis below 2 MW direct-drive type wind power converter system control theory to provide a theoretical basis. Thesis, the structure characteristics of a multi-stage parallel back-to-back dual PWM inverter circuit, the parallel operation of the inverter circulation problem, proposed a variety of parallel converter flow control method. 2 MW direct drive wind power converter system, the inhibition of the general circulation, including machine side inverter control strategy. Adjustable power factor of the control system, in exceptional cases, in cooperation exchange reactive power grid, and the inverter control fan largest wind energy capture. This feedback gain self-adjusting sliding mode observer algorithm has better dynamic response and parameter robustness went on permanent magnet direct-drive wind power control system without the position speed sensor algorithm carried out a detailed theoretical studies and experimental verification, full resistance, etc., can be run in a wide speed range. Entire variable flow control system in MATLAB / SIMULINK platform and the simulation results proved the correctness of the control method. Finally, we designed a set of DSP TMS320F2808 controller-based direct-drive wind power converter system. The system uses a six-phase permanent magnet synchronous motors as generators, machine side and network-side converter unit by two parallel DSP control IGBT power module, DSP via CAN bus pass parameters to each other. Also describes a For parallel dual PWM inverter current transformer primary system and the overall design of the variable flow control system, also detailed inverter system DSP control the IGBT driver circuit and a protection circuit, the CAN communication interface circuit, fiber optic interface circuit given, in the design of the overall structure of the control system software based on the machine-side converter control program flowchart also describes the method of the SVPWM algorithm DSP digital implementation.

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CLC: > Industrial Technology > Electrotechnical > Motor > Generators, large the generator group ( Zonglun,) > Wind turbines
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