基于超导储能的直驱风电系统功率平滑控制

针对并网运行直驱风力发电系统输出有功功率的波动问题,对变换器直流环节并联超导储能系统的控制方式在计及风速模型的基础上做进一步的分析,并对超导储能系统斩波器提出双闭环加脉冲判断的控制策略,确保超导磁体线圈电流水平,使超导储能系统可以快速、准确地吞吐能量,保证直驱风力发电系统在最大限度捕获风能的同时,向电网输送较为平滑的有功功率。对增加超导储能系统的直驱风力发电系统的建模仿真结果,说明了该方法的正确性和有效性。

Smoothing Control of Directly-Driven Wind Power System with Superconducting Magnetic Energy Storage

In order to solve the problem of output fluctuations of active power occurring in directly-driven wind power generators integrated with power grid, based on the method of paralleling a superconducting magnetic energy storage system(SMESS) to the converter and the wind speed model analysis, a control strategy for the chopper of the SMESS was proposed with pulse judgment plus dual closed-loops, which can make the SMESS have energy throughput quickly and accurately, obtaining the results of maximum wind energy capture and smoother active power to the grid. Simulation of a directly-driven wind power generator with a superconducting magnetic energy storage system proves the correctness and effectiveness of the controlling strategies.