|
| 摘要: |
| 将模糊理论应用于变压器保护中面临的问题之一是如何调整权重,通常情况下权重的确定都是基于经验而非科学推理,其结果很难真实客观地反映变压器的状况;而模糊层次分析法为权重的确定提供了理论依据。采用二次谐波、基于波形间断角特征、波形对称度、基于波形正弦特征4个判据,利用模糊理论和模糊层次分析法确定权重原理将其有机结合来判别变压器励磁涌流和故障电流。仿真结果表明:采用模糊层次分析法确定各判据的权重有效地解决了模糊逻辑中权重系数的确定问题;模糊理论能够克服传统保护中的某些不足,使各判据优势互补,改善了变压器保护的性能。 |
| 关键词: 模糊理论,模糊层次分析法,变压器保护,励磁涌流 |
| DOI： |
| 分类号:TM772 |
| 基金项目: |
|
| Application of fuzzy analytical hierarchy process in transformer excitation inrush detection |
|
LU Xuefeng WANG Zengping XU Yan CHEN Haibin
|
| Abstract: |
| The weights of fuzzy theory are normally set based on experiences in transformer protection,hardly reflecting the real status of transformer.Fuzzy theory and fuzzy analytical hierarchy process are adopted to theoretically determine the weights,using four criteria to detect excitation inrush from fault current:second harmonic,interruptive angle,waveform symmetry and sine principle.Simulation shows that the fuzzy analytical hierarchy process effectively determines the weight for each criterion and the fuzzy theory improves the performance of transformer protection. |
| Key words: fuzzy theory,fuzzy analytical hierarchy process,transformer protection,inrush current |
