基于电气特性–物理属性的工业用户电压暂降缓减策略

Voltage Sag Mitigation Strategy for Industrial Users Based on Process Electrical Characteristics-physical Attribute

电压暂降可引发工业用户生产过程非正常中断,造成巨大经济损失。针对现有工业用户电压暂降治理方案单一、成本较高等问题,该文首先依据工业过程的电气特性和物理属性,提出作用于电压补偿的电气类手段和着眼于过程量维持的物理类手段;其次,从过程参数角度,统一衡量各类缓减措施的效果,提出一种加装定制电力设备与改造厂务设施相结合的电压暂降缓减方法,以维持过程参数在受到扰动期间不越限,避免过程中断的严重后果;最后,综合考虑各类缓减手段的投资成本与收益,以方案净现值最大为目标,确定缓减措施的配置。将所提缓减策略应用于某新能源材料企业,结果表明该文方法能够有效缓减电压暂降后果,且相对于传统单一电压补偿方案更具经济性。

Voltage sag can cause abnormal interruption of production process of industrial users, resulting in huge economic losses. In view of the single governance angle and poor governance effect of existing voltage sag mitigation schemes, according to the electrical characteristics and physical attributes of industrial processes, this paper proposed electrical means focusing on voltage control and physical means focusing on process quantity maintenance. From the point of view of process parameters, the effects of various mitigation measures were measured in a unified way. A voltage sag mitigation method was proposed, which combines the installation of customized power equipment with the renovation of plant facilities, in order to maintain the process parameters during the period of disturbance and avoid the serious consequences of process interruption. Considering the investment cost and income of various mitigation measures, the allocation of mitigation measures was determined with the goal of maximizing the net present value(NPV) of the scheme. The mitigation strategy proposed in this paper was applied to a new energy material enterprise. The results show that the proposed method can effectively mitigate the consequences of voltage sag and is more economical than the traditional voltage compensation scheme.