高原水电站高压避雷器腐蚀失效状态检测技术研究

Research on corrosion failure detection technology of high-voltage arrester in plateau hydropower station

为了保证高原水电站高压避雷器的安全平稳运行,提出了水电站高原高压避雷器腐蚀失效状态精准检测方法。分析高压避雷器结构,明确避雷器绝缘保护原理;计算高原海拔高度与电力绝缘关系,得出高原环境中雷电流经过避雷器的绝缘强度值;引入遗传算法,记录不同雷电打击节点的激励电流,得出每个节点的适应度函数,迭代运算得出避雷器腐蚀失效状态检测结果。由实验结果可以看出,所提研究方法可明确随着腐蚀时间的增加,监测高压避雷器的失效状态变化情况,及时检测出腐蚀失效器件,保障水电站内电力设备的稳定运行。

In order to ensure the safe and stable operation of high-voltage lightning arresters in plateau hydropower stations,a precise detection method for the corrosion failure status of high-voltage lightning arresters in plateau hydropower stations was proposed.The structure of high-voltage lightning arrester was analyzed and the insulation protection principle of lightning arrester was clarified.The relationship between the altitude of the plateau and electrical insulation was calculated,and the insulation strength value of lightning current passing through the lightning arrester in the plateau environment was obtained.The genetic algorithm was introduced to record the excitation current of different lightning strike nodes,and the fitness function of each node was obtained,and the detection results of the corrosion failure state of the arrester were obtained by iterative operation.From the experimental results,it can be seen that the proposed research method can clarify the changes in the failure status of high-voltage lightning arresters with the increase of corrosion time,timely detect corrosion failure devices,and ensure the stable operation of power equipment in hydropower stations.