变阻尼调匝式消弧线圈及接地选线综合控制器

通过消弧线圈二次辅助绕组接入阻尼电阻的方法解决了阻尼电阻易损坏的问题。但是，当消弧线圈工作于不同的抽头时，其等效阻尼电阻将发生变化。对这种变阻尼消弧线圈的控制和阻尼电阻的选取要有新的原理和方法，文中给出了二次侧阻尼电阻值的选取方法，并提出变阻尼条件下通过测量中性点电流检测电网电容电流的方法。进而提出了消弧线圈单机控制和多机控制原理以及零序电流增量函数法接地选线原理，开发出变阻尼消弧线圈及接地选线综合控制器。成套装置已投入工业运行多年，装置运行稳定，补偿效果令人满意，接地选线准确。

AN INTEGRATED CONTROLLER OF MULTI-TAP ARC-SUPPRESSION WITH VARIATIONAL DAMP AND DETECTION OF EARTH FAULT FEEDER

With the way of connecting damp resistor to the secondary assistant winding of arc-suppression, the question of easily destroyed damp resistor is solved. The equivalent damp resistance changes with the variety of the tap of arc-suppression. So another train of thoughts is needed to calculate the value of the damp resistor and control the arc-suppression. In this paper, a new method of choosing secondary damp resistance is proposed. At first, the method of measuring the single-phase-to-earth capacitive current of the power network by measuring the neutral point current is presented, and then the principle of controlling one or more arc-suppressions is investigated, thirdly is a principle based on zero sequence current increment function for detecting grounded feeder is put forward. Moreover, a controller for arc-suppression with variation of damp and detection of earth fault feeder is developed. Sets of such equipment have been implemented steadily for many years in power networks, and the compensation effect is satisfied and the result of detecting fault feeders is correct.