The Research On Grid Integration Of Gird-connected Wind With Unified Power Quality Control Functions

Wind energy as a clean, renewable energy, and its development and utilization has attractedworld attention. wind power as one of the most effective forms, has got rapid development inrecent years. micro-grid wind power become effective way of distributed wind powergeneration into the power grid. for randomness and instability of wind power, grid integrationof gird-connected wind will result in complicated power quality disturbances of voltage andfrequency fluctuations, voltage flicker, harmonic pollution in the access point, and theresearch which is grid integration of grid-connected wind with unified power quality controlfunction, has important theoretical and practical value.The paper first analyzes the wind power micro-grid power quality characteristics, discussesthe corresponding improvement measures, then in order to comprehensively improve windpower micro-grid and the main grid of high power quality runs as the goal, in-depth study ofwind power micro-mesh grid power interface having power quality unified control windpower micro-mesh grid power interface topology, mathematical modeling, signal detectionand control methods were analyzed in detail. in topology, the network, based on Micro-DCconverter in parallel mode dual grid structure, was studied in the paper. Studies in signaldetection theory based on the theory of generalized harmonic voltage power qualitydisturbance algorithm, and based on the theory of generalized harmonic current power qualitydisturbance and wind power micro-grid active current combination algorithm. according tothe power characteristics of wind power system and the operation characteristics of the windturbine, a novel MPPT control scheme based optimal electromagnetic torque reference and anew method for detecting initial rotor position of the PMSG were proposed. Output controlalgorithm is used three-state hysteresis, discussed in detail the implementation method of theconstant frequency three state hysteresis and frequency three state hysteresis. on this basis,using MATLAB/Simulink simulation platform carried out the power of uniform qualitycontrol function for wind power micro-grid power Interface works and signal detection andcontrol algorithm for the simulation.Finally, the article has carried out the design of a unified power quality control functionnetworks for wind power micro-power interface, given the circuit parameters design andbased on a32-bit floating point unit performance TM320C28343DSP chip as the corehardware and software design.