变压器冷却装置用交流继电器性能参数提取方法

大型电力变压器冷却装置用交流继电器的运行性能及其状态监测对变压器安全稳定运行至关重要。针对其交流继电器性能参数常规提取方法不准确的问题,文章提出了一种基于小波去噪和结合交流电压信号峰值快速计算的交流继电器性能参数的提取方法。通过对交流电压信号峰值快速计算方法的仿真以及实际变压器冷却装置用交流继电器性能的测试,结果比较表明文章提出增加小波去噪环节的交流继电器性能参数提取方法的有效性和准确性。

An Extracted Method of Performance Parameters of AC Relay in Power Transformer Cooling Equipments

Operation performance and condition monitoring of AC relay in power transformer cooling equipments is vital to the safe and stable operation of a large power transformer. Regarding as the incorrect issue of performance parameters of AC relay based on the traditional extracted method, an extracted method is proposed by using the fast amplitude calculation method of alternating current voltage signals combined the wavelet denoising part in this paper. By simulation on the fast amplitude calculation method of alternating current voltage signals and the testing and comparison on the practical AC Relay for a power transformer cooling equipment, the results and comparison have shown that by adding the wavelet denoising part, the proposed performance parameters extraction method of AC relay has better availability and accuracy.