CAJ | 학술논문

为了消除传感头随温度变化的线性双折射对光学电流互感器性能的影响,提出了光学平衡桥式电流互感器的概念,并给出了设计原理.推导了与温度有关的线性双折射导致的线偏振光方化角变化量的解析式,并计算了用1/2波片来消除线性双折射影响时波片光轴的方向.给出了光学平衡桥的工作原理和信号处理的方法,推导出计算电流的表达式.进行了实验研究,螺线管电流为2 A,温度在20℃-65℃范围变化时,所设计互感器的输出误差在2.96%以内.提出的光学平衡桥式电流互感器,解决了原有方法存在的线性双折射随温度变化对测量精度影响的难题,有利于促进光学电流互感器的实用化进程.
위료소제전감두수온도변화적선성쌍절사대광학전류호감기성능적영향,제출료광학평형교식전류호감기적개념,병급출료설계원리.추도료여온도유관적선성쌍절사도치적선편진광방화각변화량적해석식,병계산료용1/2파편래소제선성쌍절사영향시파편광축적방향.급출료광학평형교적공작원리화신호처리적방법,추도출계산전류적표체식.진행료실험연구,라선관전류위2 A,온도재20℃-65℃범위변화시,소설계호감기적수출오차재2.96%이내.제출적광학평형교식전류호감기,해결료원유방법존재적선성쌍절사수온도변화대측량정도영향적난제,유리우촉진광학전류호감기적실용화진정.
In order to eliminate the effect to the optical current transformer by the liner birefringence which changes with the temperature, the idea of optical balanced bridge current transformer is advanced, and the principle is also givens analytical expression of azimuth angle variation is deduced that is produced by liner birefringence, the direction of 1/2 wave plate axis is also calculated which is used to eliminate the effect of the liner birefringence. The working principle and signal processing method of the optical balanced bridge are given, the expression that used to calculate the current is deduced. It is proved that the current transformer output error is within 2. 96% when the temperature changes between 20 ℃ and 65 ℃ as the current is 2 A. The advancement of optical balanced bridge current transformer solved the problem of the effect to the system produced by the birefringence along with the variation of temperature which could not be solved using the traditional methods. This new method will boost the utility of optical current transformer.