基于DSP技术的高压输变电设备状态监测研究

Research on state monitoring of high voltage power transmission and transformation equipment based on DSP technology

当前常用的红外线成像监测技术等易受到高压输变电噪声环境影响,导致其对变压器和避雷器状态的监测结果不精准。针对该问题,提出了基于DSP技术的高压输变电设备状态监测方法。首先分析DSP技术原理,然后监测不同故障情况下产生的气体,并计算变压器运行损耗值,从而监测变压器绕组变形状态;在分析避雷器总泄露电流情况的基础上,计算容性电流和阻性电流,并分析两者之间的相位差,再提取容性电流信号初值,并将其与总泄漏电流对比,从而确定避雷器运行状态。由实验结果可知,利用该方法监测到的变压器监测气体与实际主要气体和次要气体一致,避雷器电压波动幅值与实际电压一致,证明其可得到精准的监测结果。

At present,the commonly used infrared imaging monitoring technology is easily affected by the noise environment of highvoltage transmission and transformation,which leads to inaccurate monitoring results of transformer and arrester status.In order to solve this problem,a condition monitoring method of HV transmission and transformation equipment based on DSP technology is proposed.Firstly,the principle of DSP technology is analyzed,then the gas generated under different fault conditions is monitored,and the operating loss value of transformer is calculated,so as to monitor the transformer winding deformation state.Based on the analysis of the total leakage current of the arrester,the capacitive current and the resistive current are calculated,and the phase difference between them is analyzed.Then the initial value of the capacitive current signal is extracted and compared with the total leakage current,so as to determine the operating state of the arrester.According to the experimental results,the gas monitored by this method is consistent with the actual main gas and secondary gas,and the voltage fluctuation amplitude of the arrester is consistent with the actual voltage,which proves that it can obtain accurate monitoring results.