Research Of Wind Generation Emulation System

Along with international energy being anxious day by day, a renewable and clean energy wind power's development and utilization gets more and more attentions. At present, the cost of the wind power generation install is higher than thermoelectricity power generation. So the study of this new power generation system has to speed up as required. However, providing a good hardware environment for the study of wind power generation, wind simulate under the laboratory conditions is considerable. Simulate system, mainly use DC motors, synchronous motors or induction motor simulation system. In this paper, we use Squirrel-cage induction machine to emulate wind turbine.Squirrel-cage induction machines are simple and rugged in structure, low cost and reliable operation, considered to being an important position in modern AC drive system. Through theoretical analysis, computer simulation and experiments on ISC(indirect stator-quantity control), this paper deeply researches in wind simulation. It is true that compares with the vector control, indirect stator-quantity control performance is not better. However indirect stator-quantity control needn't complex calculate for rotation vector. Compares with the direct torque control, indirect stator-quantity control can operate at a fixed switching frequency, small torque ripple, circular magnetic chain, similar to low wind speed and large wind turbine torque. Also for torque estimate exactly, this article makes use of the hardware of motor control circuit to complete motor parameter identification, which offer accurate parameters for control system.Firstly this article design and simulate the analog wind curve, parameter identification and indirect stator-quantity control in PSIM platform software. Simulation verifies the feasible of the design program. Then this paper design a hardware control system based on dsPIC30F3011, select a comprehensive three-phase bridge circuit board which uses IPM and interface circuit board foundation of the emulation program. On the completion of the software section, the thesis designs a MATLAB/GUI and the MPLAB integrated development environment software program. The thesis complete MATLAB/GUI program, PC communication and achieve asynchronous motor's parameters self-identification.Upon completion of the hardware and software system design, this paper conducted a preliminary debugging. Simulation and experimental results verify part of the emulation system achieving the functional requirements. Of course, the experiment needs further optimization and improvement.