提高复杂拓扑风电场动态等值水平的增广路径标号算法

Augmented path labeling algorithm for improving dynamic equivalence level of complex topological wind farms

随着风电场装机容量增加、规模扩大、拓扑结构日益复杂,风电场等值建模对电网仿真分析的影响越来越大。首先建立BPA风电场仿真模型以及两机电网模型,针对复杂拓扑风电场等值建模,提出采用增广路径标号算法分组识别大型风电场复杂拓扑结构特性,以集电参数功率损耗为等值建模原则,经过干线式和放射式接线组合的多次迭代后,完成复杂拓扑风电场的单机等值建模。最后,应用BPA程序仿真分析不同规模风电场的动态等值水平,比较并网点功率及频率特性,验证了所提出的等值方法能够解决复杂拓扑风电场等值问题,提高了动态等值水平。对于大规模风电场,此方法提高了并网点功率的适应性,但对暂态响应特性的适应性不足,仍须进行多机等值建模。

With the increase of installation capacity,expansion of the wind farm scale,and more and more complex topology,the collector parameters equivalent has a larger influence on the wind farm modeling.In this paper,the BPA wind farm simulation model and the two-machine power grid model are set up firstly.In view of the complex topology wind farm equivalent modeling,an augmented path marking algorithm is proposed to identify the complex topological structure characteristics of large wind farms.Based on the principle of the equivalent modeling of the power loss of the collector parameters,the single computer equivalent modeling of the complex topology wind field is completed after multiple iterations of the combination of the trunk line and the radial connection.Finally,the dynamic equivalence level of different scales of wind farms is simulated by BPA program,and the power and frequency characteristics of the network are compared.It is verified that the equivalent method proposed in this paper can solve the equivalent problem of complex topological wind farms and improve the dynamic equivalence level.For large-scale wind farms,this method improves the adaptability of network power,but the adaptability to the transient response characteristics is insufficient,and the multi machine equivalent modeling is still needed.