考虑经济损失期望的电压暂降分层分级治理方法

Hierarchical Control Method of Voltage Sag Considering Economic Loss Expectation

电压暂降因其给敏感用户带来的经济损失和社会影响而广受关注。电压暂降的治理涉及到系统、用户、设备3个层次的“责权利”,一直以来在治理上投入产出比不尽人意,尚未形成系统全面的治理体系。本文首先从不同层次分析研究了电压暂降发生、传播、危害的机理及影响因素,提出了一种考虑经济损失期望的敏感负荷分级方法与标准,该方法基于场景法生成电压暂降特征量,结合综合过程免疫时间对敏感负荷经济损失进行分级;其次,从电压暂降事件预防、设备持续运行、损失降低等方面综合对比了各种治理手段,并建立了基于敏感负荷分级的电压暂降治理体系,为配电网运行管理部门与电力用户选择合理经济的降低电压暂降损失的方案与措施提供参考。

Voltage sag is widely concerned due to its economic loss and social impact on sensitive users.The control of voltage sag involves such three levels of responsibility and righ as system,user and equipment and the input-output ratio of control has been unsatisfactory,and a systematic and comprehensive control system has not yet been formed.In this paper,the mechanism and influencing factors of voltage sag occurrence,propagation and harm are firstly analyzed from different levels,a classification method and standard of sensitive load considering economic loss expectation are proposed.The method generates voltage sag characteristic quantity based on scenario method,and classifies economic loss of sensitive load combining with comprehensive process immune time.Secondly,various control measures are comprehensively compared from such aspects as voltage sag event prevention,continuous operation of equipment and reduction of loss and the voltage sag control system based on sensitive load classification is set up,which provides reference for distribution network operation management department and utility power to choose reasonable and economic schemes and measures to reduce voltage sag loss.