分布式风力发电接纳能力影响因素仿真分析

Simulation Analysis of Influence Factors of Distributed Generation's Adopt Capacity

分布式发电的大规模接入使得配电网潮流发生较大变化,这些变化限制了分布式发电的接入。影响分布式发电接纳能力的因素很多,主要包括节点电压及支路载流量等。首先介绍了风力发电机模型,分析了前推回代法在配网潮流计算中的应用,然后搭建了IEEE33节点系统模型,对分布式发电接入后的系统进行了潮流计算,最后分析了节点电压、支路载流量等因素对分布式发电接纳能力的影响。仿真结果表明,分布式发电接入配电网的接纳能力主要受接入位置和功率因数等因素的影响,在接入电网时只有将这些影响因素考虑在内才能提高电网对它的接纳能力,提高能源利用率。

Large scale access of distributed generation makes the power flow of distribution network change greatly, which limits the access of distributed generation. There are many factors that restrict the adopt capacity of the distributed generation, including the node voltage and branch load flow. In this paper, the model of wind turbine was introduced and the application of forward and backward substitution method in the calculation of power flow was analyzed. And then a IEEE33 system model was built to calculate the power flow of the distributed network accepting DG. Finally, the influence of node voltage and branch load flow on the distributed generation＇s accepted capacity was analyzed. The simulation results showed that the adopt capacity of the distributed generation will be affected by the location and power factor. Only taking these factors into account, can the accepted capacity of the DGbe improved, and can the utilization of the distributed generation in the power system be increased.