基于多维特征和Hausdorff距离的电压暂降治理成本估计

Cost Estimation for Voltage Sag Control Based on Multidimensional Characteristics and Hausdorff Distance

电压暂降治理是非标准化工程,由于缺少用户侧详细信息,治理容量估计困难,易造成过度治理或治理不足。考虑治理对象受电压暂降多维特征影响的事实,研究治理对象耐受能力和治理容量识别问题,提出一种考虑电压暂降多维特征的敏感设备耐受能力Hausdorff距离识别方法,引入模式库概念,利用模糊隶属度判别治理对象电压耐受能力,在此基础上提出改进电压暂降严重程度指标,提出基于改进电压暂降严重程度指标和治理对象容量占比的治理容量识别方法,由此估计所需治理成本。结合某城市电网实际监测数据进行实证分析,结果证明了提出方法的有效性和合理性,便于实际工程应用。

Voltage sag control is non-standardized.Due to the lack of user-side details,it is hard to estimate the control capacity,which frequently causes excessive or inadequate sag controls.Considering the fact that the control object is affected by the multidimensional characteristics of voltage sags,we carry out a study on the problem of tolerance ability and control capacity identification of the control objects,and propose a Hausdorff distance identification method for sensitive equipment tolerance ability with consideration of the their sag multidimensional characteristics.By introducing the concept of pattern library,the fuzzy membership is used to judge the voltage tolerance ability of control objects.On this basis,an improved voltage sag severity index is put forward,and a control capacity identification method is proposed based on the improved sag severity index and control object capacity ratio.And then the required control cost is estimated.Based on the actual monitoring data of a city power grid,a case study shows that the proposed method is effective and reasonable,and is easy for practical application.