电子式电流互感器高压端供能电源的设计

电子式电流互感器(Electronic Current Transform,简称ECT)在电力系统中具有广泛的应用前景,但为其高压端供能的电源是研究的难点,一直制约着有源电流互感器(CT)的应用.在此,设计了一种改进的供电方案--交直流结合供电方案,即小CT母线电流取能和储能电池相结合供电.介绍了该方案的供能原理,并进行了具体的设计和实验.实验证明,该电源方案能在母线电流很小或断电的情况下为CT高压端电源提供不小于250mW的功率,而且能在大电流情况下.提供稳定电压,保护后续变换电路,有效解决了母线取能供电存在的技术难点.

Design of Power of Electronic Current Transformer in High Voltage Side

The electronic current transformer has the widespread application prospect in the electrical power system,its power source in high-voltage side is difficult in the research,which restricts the application of the active current trans-former continuously.One kind of improved power supply method is proposed,which adopts the power supply mode of the combination of the line with the battery stored energy.The principle for supply power is introduced.The idiographic design and experiment are carried on.The experimental results show that the circuit of power can supply about 250mW for high voltage circuits,when the current is small or zero.It can also provide the stabile voltage and protect the circuit at the back,when the current in line is large.The difficulties are solved in the power induced from line by CT.