多并联支路型可控电抗器短路电抗对支路电抗和电流的影响

发布时间：2019-08-09 19:04

【摘要】：短路电抗对支路电抗和电流的影响是造成多并联支路型可控电抗器(Controllable Reactor of Multi-parallel Branch Type,CRMB)支路电抗和电流额定值的选取困难、以及设备利用率下降的重要原因。根据CRMB各支路晶闸管依次导通和关断的工作特点,采用递推算法求得了CRMB支路电抗和电流的计算公式。对这些计算公式的函数分析和算例分析后指出,支路电抗随着短路电抗的增大而减小;支路电流额定值随着短路阻抗的增大而增大,而其支路电流额定值利用率最小值随着短路电抗的增大而减小;为了提高CRMB设备利用率,CRMB短路电抗应小于一个由电流额定值利用率的最小值、CRMB支路容量递增系数和支路数决定的最大值,由此可以选取短路电抗、支路电抗和电流的设计额定值。研究结论可为CRMB的工程设计和变压器式可控电抗器的研究提供理论参考。
[Abstract]:The influence of short circuit reactance on branch reactance and current is an important reason for the difficulty of selecting branch reactance and current rating of multi-parallel branch controllable reactor (Controllable Reactor of Multi-parallel Branch Type,CRMB), as well as the decrease of equipment utilization ratio. According to the working characteristics of CRMB branch thyristors in turn on and off, the formulas for calculating the reactance and current of CRMB branches are obtained by using the recurrence algorithm. After the function analysis and example analysis of these formulas, it is pointed out that the branch reactance decreases with the increase of short-circuit reactance, the branch current rating increases with the increase of short-circuit impedance, and the minimum utilization ratio of branch current rating decreases with the increase of short-circuit reactance. In order to improve the utilization rate of CRMB equipment, CRMB short-circuit reactance should be less than a minimum value determined by the utilization ratio of current rating, the maximum value determined by the increasing coefficient of CRMB branch capacity and the number of branches, from which the design ratings of short-circuit reactance, branch reactance and current can be selected. The research results can provide theoretical reference for the engineering design of CRMB and the research of transformer controllable reactor.
【作者单位】：兰州交通大学自动化与电气工程学院;
【基金】：国家自然科学基金(51167009,51367010) 甘肃省科技计划(1304WCGA181) 甘肃省财政厅基本科研业务基金(213052) 兰州市科技计划(2013-4-111)资助项目
【分类号】：TM47

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