光电式电流互感器二次信号现场模拟方法

Field Simulation Method for Secondary Signal of Optical Current Transformer

光电式电流互感器对电力系统,特别是对(特)高压直流输电工程安全稳定运行影响重大。若开展直流控制保护系统现场校验,无法避开对光电式电流互感器的二次信号现场模拟。目前缺乏易于实施且满足现场需求的光电式电流互感器二次信号现场模拟方法。提出了一种无需解析光电协议的光电式电流互感器二次信号现场模拟方法,并研制了具备光电式电流互感器二次信号现场模拟能力装置。采用所提方法与装置在±500 kV江城直流鹅城换流站开展了光电式电流互感器二次信号模拟测试,验证了所提方法和装置可行。

The optical current transformer plays an important role in the security and stability of the power system especially high voltage direct current.The direct current control and protection system can not be verified on site without field simulation for the optical current transformer secondary signal.But the field simulation method for secondary signal of optical current transformer is lacking for easy to implement and meeting requirement.A novel field simulation method is proposed for secondary signal of optical current transformer without explanation of photoelectric conversion agreement.The field test device has been developed with secondary signal simulation quantity of optical current transformer. Its validity is verified by field testing of secondary signal simulation of optical current transformer in Echeng convert station of Jiangcheng ±500 kV transmission project.