直驱型风电场聚合模型误差对电力系统暂态稳定分析的影响

发布时间：2018-05-04 18:17

本文选题：风电场 + 永磁同步发电机　；参考：《电网技术》2016年02期

【摘要】：风电场聚合建模通常将整个风场按装机容量折算至一台机组。由于检修、弱风或故障脱网等原因,实际并网机组的数量将降低,引起聚合模型的误差。主要研究并网容量对直驱型风电场聚合模型误差及其对电力系统暂态稳定分析的影响。详细分析了故障期间低电压穿越(low voltage ride through,LVRT)策略对永磁同步发电机(permanent magnet synchronous generator,PMSG)外特性的影响。推导出了风电场在线容量与聚合模型误差之间的量化关系。通过仿真分析分别对比了不同在线容量时聚合模型在LVRT过程中有功功率、无功功率及恢复时间之间等输出量之间的误差。分析了具有可控功率源性质的PMSG接入对同步发电机功角稳定性的影响。结果表明,由聚合模型计算得出的系统暂态稳定分析的结论偏乐观。
[Abstract]:Wind farm aggregation modeling usually converts the whole wind field to one unit according to installed capacity. Due to the reasons of overhaul, weak wind or failure, the actual number of grid-connected units will be reduced, resulting in the error of the aggregation model. The effect of grid-connected capacity on convergent model error of direct-drive wind farm and its influence on transient stability analysis of power system is studied. The effect of low voltage traverse voltage ride through LVRTT strategy on the external characteristics of permanent magnet synchronous generator permanent magnet synchronous generator (PMSG) is analyzed in detail. The quantitative relationship between the online capacity of wind farm and the error of polymerization model is deduced. The errors between the active power, reactive power and recovery time of the polymerization model with different on-line capacity in LVRT are compared by simulation. The influence of PMSG access with controllable power source on the power angle stability of synchronous generator is analyzed. The results show that the conclusion of transient stability analysis based on aggregation model is optimistic.
【作者单位】：电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系);
【基金】：国家电网公司科技项目“新能源接入电网后系统暂态稳定机理研究与评估方法”~~
【分类号】：TM614

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