低电压穿越对给煤机变频器影响的试验与研究

Test and research of the low voltage ride-through influence on the converter of coal feeder

为了避免电厂由于系统低电压扰动而造成给煤机跳闸,从而触发机组保护动作,针对浙江浙能兰溪发电有限责任公司设备的具体情况,开展了低电压对给煤机变频器影响的试验与研究,提出了一种适合中速磨煤机正压直吹式制粉系统的给煤机变频器低电压穿越的方法。

In order to avoid the power plant tripping due to low voltage disturbance of the power plant which triggers the protection action of the unit,the test of the influence of low voltage on the converter of the coal feeder was carried out according to the specific conditions of the equipment of Zhejiang Energy Lanxi Power Generation Company Limited. It proposed a method of low voltage ride-through for coal feeder frequency converter of directfiring pulverizing system with middle speed mill.