自适应光学电流互感器

该文在最小二乘原理的基础上引入Iwamoto-Tamura法，提出了一种保留非线性最小二乘算法，通过对传统OCT现场实测数据进行分析，证明采用环境温度直接补偿传统OCT是不可取的。为此，提出了一种新型的AOCT，以稳态电流参考模型和传统OCT为基础，应用自适应Kalman和小波理论，构成了模型参考自适应控制系统，消除了温度等因素对传统OCT的影响，从而综合提高了暂态和稳态测量准确度。由于AOCT具有前馈特性，在保证AOCT准确度的前提下能使OCT传感头的结构大为简化，从而提高AOCT的整体稳定性。目前，AOCT已经在河北省保定市沙窝变电站挂网运行，实践证明AOCT具有优良的性能。

ADAPTIVE OPTICAL CURRENT TRANSDUCER

A new retaining nonlinear least square estimation method is proposed in this paper, which is able to apply the estimation of nonlinear model parameters. This paper applied the method to gain the parameters of OCT according to the field measured datum, and proved that the compensation method of OCT by field temperature is not proper. A new kind of Adaptive Optical Current Transducer (abbreviation AOCT) is presented in this paper, which apply adaptive kalman filter and wavelet theory to form the model reference adaptive control system. Since the disturbance of temperature and stress was eliminated in the AOCT, the accuracy in the steady state and transient state of the AOCT is improved. Since the AOCT take on preceding feedback characteristic, the structure of OCT is able to be simplified to improve the stability of AOCT. At present, AOCT have been installed in the substation BaoDing city HeBei province. Results have shown that the AOCT designed in this paper has good characteristics.