With the compensator , the accuracy of an 2 grade current transformers can be improved to less than the 0 . 2 grade standard at 100 % rating when the primary side current is changed from 2 % to 120 % of the rating 在實驗中將準確度為2級的電流互感器經(jīng)過補償以后一次電流從額定值的5變化到120時,電流互感器的測量誤差不超過一次電流額定值100時準確度為0 . 2級的測量標準。
The author has finished the following several jobs in core of the centre : 1 ) the active compensation method based on bang - bang control was put forward to realize the wide range current transformer . the method converts the complex statement space to i / o description by the two - stage current transformer . with the compensation method , the accuracy of 0 . 2 grade current transformer can be improved to less than the 0 . 1 grade standard at 100 % rating when the primary side current is changed from 2 % to 120 % of the rating 圍繞這一工作核心,作者完成了以下幾項工作: ( 1 )以實現(xiàn)寬量程電流互感器為目標,提出了基于bang - bang控制的有源補償方法,采用雙級電流互感器,將復雜的狀態(tài)控制分量轉(zhuǎn)化為偏差控制,該方法結(jié)構(gòu)簡單,調(diào)試方便,有源補償器輸出電流小,可以將0 . 2級的電流互感器經(jīng)過補償后提高到一次電流從額定值的2變化到120時,測量誤差不超過一次電流額定值100時準確度為0 . 1級的測量標準。