考虑不同光伏渗透率影响的配电网风险规划研究

针对含光伏电源的配电网规划问题,考虑光伏输出特性受天气影响和因此造成配网潮流方向的改变和产生电压偏差等影响因素,提出了一种考虑不同光伏渗透率和电网运行风险的配电网规划方法。将天气状态大致归为3类,得到3种典型的光伏出力曲线。采用两状态天气模型,用不同天气条件下的线路故障率和光伏出力来表征天气状况对网架线路规划方案的影响,并通过系统切负荷期望值评估了规划方案的运行风险。提出了用于对不同光伏渗透率下规划方案经济性进行了评估的光伏发电投资收益比,综合给出合理的规划方案,并用不同的配电规划系统进行了测试。研究结果表明,光伏渗透率对光伏投资收益比和网架线路规划有重要影响。

Risk planning of distribution network considering different PV permeability

Aiming at the disadvantages of low efficiency and low utilization ratio of NC machine tools which are caused by 2D process, 3D process was explored for the rotor. Firstly, the typical process of rotor was used as a template, then machine tool model, cutting tool model and rotor model were set up. Next, NC programming, virtual machining, program correction were carried on by EdgeCAM and Vericut software. Finally, the 3D process specification as well as the processing video were obtained. The original paper process was compared with the 3D process. The results indicate that the latter clearly shows the whole process of the rotor, which can guide the new staff to complete his tasks and reduce the learning time. So it can greatly improve the efficiency, and reduce production costs. [ABSTRACT FROM AUTHOR]