【摘要】 讨论了在线监测变压器局部放电中的各种干扰的来源、传播途径、特征以及对测量过程的影响．在此基础上研制出一种不需对检测信号作调幅、凋相处理，就能在强干扰中正确和稳定地获取变压器内部局部放电信号的抗干扰测量电路．文中对此电路的工作原理和试验结果作了介绍．更多还原

【Abstract】 This paper discusses the sources, spreading paths and characteristics of noises under the condition of on-line detecting partial discharge (PD) in transformers. On this baSis, an antiinterference measuring circuit using the method of pulse polarity discrimination is developed. The analysis and tests show that the operation of this circuit is not affected by the difference of phase and amplitude between two input signals. Correct and stable signals of PD of transformers can be provided by the use of this circuit.更多还原