The University of Osaka · 공학
Fei Xiao 교수의 연구실은 전력 시스템의 안전성 및 전력 품질 향상을 위한 데이터 기반 지능형 분석 기법을 핵심으로 한다. 전력망의 실시간 보안 평가, 전력 품질 이상 탐지, 전력 도난 탐지 등에 응용되는 기계학습 및 통계적 모델링 기법을 개발하고 있으며, 특히 실시간 상태 인식과 이상 징후 예측에 초점을 맞추고 있다. 또한 고엔트로피 합금의 상전이 특성 예측 등 재료 과학 분야의 데이터 기반 설계 도구 개발도 함께 진행 중이다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Traditional online security assessment determines whether the system is secure or not, but how secure or insecure is not explicitly indicated. This paper develops probabilistic indices, risk, to assess real-time power system security level. Risk captures not only event likelihood, but also consequence. System security level associated with low voltage and overload can be optimally controlled, using the NSGA multiobjective optimization method. A security diagram is used to visualize operating con
Power quality (PQ) disturbance in power systems has been a concern for operators and customers. The purpose is to locate and forecast the presence of PQ disturbances to suppress or avoid their negative effects on power grid and appliances. This study, using a multi-hidden Markov model (MHMM), motivates data-driven tools to achieve situation awareness of PQ disturbance. We first design a modified adaptive-sorted neighborhood method that consists of blocking and merging phases to locate PQ disturb
Machine learning approaches (ML) based on data-driven models are conducive to accelerating the assessments of the martensitic transformation peak temperature (Tp) of TiZrHfNiCoCu high entropy shape memory alloys (HESMAs) over a huge composition space. In this work, an interpretable machine learning workflow was established through dataset construction, feature selection, modeling and validation, and model interpretation. We identified a set of key feature combinations closely related to Tp, by e
This study presents a new technique for power quality (PQ) disturbance detection. The technique focuses on voltage sags and interruptions that are related to various faults, i.e. transmission line, feeder, and transformer faults. A maximal overlap discrete wavelet transform‐based PQ detection algorithm is proposed to provide accurate points of disturbance initiation and recovery. The proposed PQ detection algorithm is robust even without a detection threshold and independent of the sampling freq
Illegal use of electricity has been a major concern in power system industries for a long time. Fraudulent large‐scale consumption of electricity may result in an unbalanced demand–supply gap. This study proposed a data‐driven electricity theft detector that is based on random matrix theory with the widespread use of smart meters and advanced metering infrastructure. The application of an augmented matrix as the data source is the key step of the proposed method, indicating the correlations betw
