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有源电力滤波器(Active Power Filter,简称APF)是一种动态抑制谐波和补偿无功功率的新型电力电子装置,其输出的电流中含有丰富的谐波成份.APF主电路中的功率器件不可避免地存在死区时间,这将极大地影响APF输出的谐波电流,从而对APF的补偿性能产生消极影响.以三相电压型PWM变流器为研究对象,简要分析并联型APF的工作原理.在此基础上,详细研究了死区时间的产生机理和效应,并通过数学推理定量分析了死区时间的存在对补偿性能的影响,并通过试验证明了数学推理的正确性,最后提出了死区补偿的措施. 相似文献
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介绍了钛白粉生产中酸解渣的产生和利用情况,目前对钛白生产过程中产生的酸解废渣进行固液分离主要采用传统的稀释法,该工艺存在钛液回收率偏低和产生大量洗水的缺点。叙述了应用过滤设备的新工艺情况,利用箱式压滤机分离钛白生产酸解过程中产生的酸性残渣,结果为:钛液的回收率达91.8%,较该装置上马前提高3.6%,结果表明该装置能较完全提取残渣中钛液,提高钛白收率,同时沉降底部残渣中的钛液经分离后不会被稀释,降低残渣的含水量,便于残渣综合利用。 相似文献
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配电系统中谐波危害很大.而无源滤波器由于结构简单、经济可靠得以广泛应用,本文以某化工厂配电系统为例,详细介绍采用单调谐滤波器治理5、7次谐波,无源滤波器各元件的设计计算过程。 相似文献
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Mingxing Zhang Haiyan Chen Cuiping Yan Qianqian Li Jie Qiu 《Advanced Powder Technology》2018,29(8):1787-1794
This work investigated the amounts of dust residual of a rectangular flat pleated filter for collecting corn straw particles during pulse cleaning and attempted to explore the causes of incomplete cleaning. In this study, dust residual, filter’s pressure drops and static peak pressures were obtained across flat pleated filter during the pulse cleaning. The optimum parameters were obtained that the pulse electromagnetic valve size was one inch, the pulse pressure was 0.2–0.3?MPa, and the filtration velocity was 0.6?m/min for the nozzle type with 7 holes with a diameter of 7?mm (7?×?Ф7?mm). Under this condition, the experimental results show that the dust residuals were 198.4 (64%), 52.7 (17%), 58.9 (19%)?g for initial collected dust residual 310?g at top, middle and bottom areas of the filter panel, respectively. The dust residuals were major on the top area of the filter panel, especially on the gap locations between the two-adjacent pulse airflows. Meanwhile, the more pulse interval or dust concentration was increased the dust residuals of the filter panel and the pressure drops of the filter were increased. Moreover, the static peak pressure distribution can give guidance to the dust residual distribution. 相似文献
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在捷联惯导系统初始对准状态估值过程中,针对传统Kalman滤波器的实时性问题,提出了基于支持向量机(SVM)网络的滤波器。采用闭环Kalman滤波器的输入和输出数据作为训练样本对进行训练得到SVM模型。通过仿真实验对比表明,采用SVM网络滤波器的估计精度与采用闭环Kalman滤波器的相当,但估计速度比较快。 相似文献
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通过对原精炼炉滤波装置运行局限性的分析,提出了利用动态无功补偿装置进行改造的方案,并进行了系统设计和论证。 相似文献