基于Larsen推理的电压暂降下工业过程负荷损失率评估方法

明确电压暂降对工业过程的影响程度,是进行暂降损失估计、提供治理方案的前提.考虑了工业过程设备级/过程级的电压暂降耐受能力,提出了一种负荷损失率的评估方法,以量化电压暂降对工业过程造成的危害.首先,为解决过程参数难以获取、精度低的问题,建立了基于物理结构的过程参数等值响应模型.将过程级的非电量过程参数值等效为电压值,以输...

Load loss rate evaluation method of an industrial process under voltage sag based on Larsen reasoning

It is a requirement of estimating voltage sag loss and providing a treatment scheme to know the impact of voltage sag on the industrial process.This paper considers the tolerance of voltage sags at the equipment/process level,and presents an evaluation method of load loss rate to quantify the harm of voltage sags.First,to solve the problems of obtaining process parameters and low accuracy,an equivalent response model of process parameters based on physical structure is established.The non-electrical process parameters at the process level are equivalent to the voltage values,and the characteristics of sag are used to describe the tolerance characteristics of equipment and industrial processes.Then,the load loss rate evaluation method based on Larsen reasoning is proposed.Taking the sag characteristic quantity as the antecedent and the load loss rate as the aftereffect,the membership functions are constructed.The evaluation of the load loss rate based on the monitoring data is realized,and the dependence of the evaluation result on accurate information is reduced.Finally,the method is applied to evaluate the load loss rate of a petrochemical enterprise in Hainan Province.The results show that the method proposed in this paper is correct and effective.