基于一种电压暂降新型描述的敏感设备免疫能力评估

发布时间：2018-01-15 19:10

本文关键词：基于一种电压暂降新型描述的敏感设备免疫能力评估　出处：《电工技术学报》2015年03期 　论文类型：期刊论文

【摘要】：介绍了电压暂降传统描述方法,分析了其在敏感设备免疫能力评估过程中的局限性。结合设备电压耐受曲线提出采用多暂降阈值和持续时间的电压暂降新型描述方法,并在此基础上提出针对设备免疫能力评估的单个事件和站点评估方法,给出站点暂降描述图的概念,可与设备电压耐受曲线方便的结合起来,评估设备因暂降发生故障的频次与频次区间。提出基于新型描述方法的电压暂降严重程度综合指标,较好解决了传统方法存在的过度评估与不精确问题。最后运用所提出的站点评估方法对PLC、ASD、AC Relay、PC 4类典型敏感设备电压暂降免疫能力进行评估,并与传统方法所得结果进行对比分析,验证了本文所分析的传统方法过度评估的缺点以及采用本文方法进行设备电压暂降免疫能力评估的可行性。
[Abstract]:The traditional description method of voltage sag is introduced. This paper analyzes its limitations in the process of evaluating the immune capability of sensitive equipment and proposes a new description method of voltage sag based on the voltage tolerance curve of equipment using multi-sags threshold and duration. On this basis, a single event and site evaluation method for equipment immune capability evaluation is proposed, and the concept of station transient diagram is given, which can be easily combined with the voltage tolerance curve of equipment. To evaluate the frequency and frequency range of equipment fault due to transient drop, a comprehensive index of voltage sag severity based on a new description method is proposed. The problem of overestimation and inaccuracy of traditional methods is well solved. Finally, the proposed method is used to evaluate the AC Relay of ASD. The immune ability of PC4 typical sensitive equipment was evaluated and compared with the results obtained by traditional methods. The shortcomings of the traditional methods are verified and the feasibility of using this method to evaluate the immune capability of equipment voltage sag is verified.
【作者单位】：华北电力大学新能源电力系统国家重点实验室;
【基金】：国家自然科学基金资助项目(51277069)
【分类号】：TM714.2
【正文快照】： 1引言电压暂降是指由于电力系统短路故障、大型电机启动、变压器励磁涌流等原因造成的电压方均根值短时间内突然下降的电能质量事件[1,2]。电压暂降会对敏感性用电设备产生较大影响,因此引起广泛关注。数据显示,电压暂降引起的电能质量问题投诉量占整个电能质量问题投诉数量的

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