The smoothing strategy of wind power combined with storage based on least square fitting

摘要

More and more renewable power with large capacity has been incorporated into power system. The high fluctuation and randomness features of wind power present a number of challenges for the safety grid. ‘Grid friendly’ wind farm with storage device can reduce the volatility impact of grid safety. The optimal output strategy based on least-square polynomial fitting was established for the wind farm with the storage device. The results showed separate order correspond to separate smoothing effect. In the case of a 49.5MW wind farm, the third order polynomial model achieved the optimal output simulation of wind farm with storage device. In contrast to other numerical value filter methods, least-square polynomial fitting method has fast computation speed, and can calculate the slope of optimal output power in real time.