TY - JOUR
T1 - Systematic Reliability Modeling and Evaluation for On-Board Power Systems of More Electric Aircrafts
AU - Xu, Qianwen
AU - Xu, Yan
AU - Tu, Pengfei
AU - Zhao, Tianyang
AU - Wang, Peng
PY - 2019/7
Y1 - 2019/7
N2 - Modern aircrafts are evolving toward more electric aircraft (MEA), resulting in greater reliance on the electrical system for safe flight. On-board power system of MEA integrates a large number of power electronic converters, and it is reported that semiconductor devices and electrolytic capacitors in power converters are the most vulnerable links impacted by loading conditions; thus, reliability becomes a critical concern in an MEA power system. This paper proposes a hierarchical approach for systematic reliability modeling and evaluation for the on-board power system of MEAs. It consists of three hierarchical levels (HLs): component level (HL1), subsystem level (HL2), and system level (HL3). In HL1, failure rates of power electronic components are modeled considering relevant inner structure and loading conditions; in HL2, the reliability of individual subsystems such as converters are constructed; in HL3, the system reliability is quantified based on the network architecture and reliability of the subsystems. The impacts of different parts (components/subsystems) on the overall system are assessed effectively with the identification of the vulnerable parts. This also provides a guideline for reliability enhancement by using thermal control techniques, adding redundancies or performing maintenance on the vulnerable parts to ensure the satisfactory of system reliability requirements. The proposed method is demonstrated on the future MEA power system architectures (hybrid ac-dc architecture and HVdc architecture).
AB - Modern aircrafts are evolving toward more electric aircraft (MEA), resulting in greater reliance on the electrical system for safe flight. On-board power system of MEA integrates a large number of power electronic converters, and it is reported that semiconductor devices and electrolytic capacitors in power converters are the most vulnerable links impacted by loading conditions; thus, reliability becomes a critical concern in an MEA power system. This paper proposes a hierarchical approach for systematic reliability modeling and evaluation for the on-board power system of MEAs. It consists of three hierarchical levels (HLs): component level (HL1), subsystem level (HL2), and system level (HL3). In HL1, failure rates of power electronic components are modeled considering relevant inner structure and loading conditions; in HL2, the reliability of individual subsystems such as converters are constructed; in HL3, the system reliability is quantified based on the network architecture and reliability of the subsystems. The impacts of different parts (components/subsystems) on the overall system are assessed effectively with the identification of the vulnerable parts. This also provides a guideline for reliability enhancement by using thermal control techniques, adding redundancies or performing maintenance on the vulnerable parts to ensure the satisfactory of system reliability requirements. The proposed method is demonstrated on the future MEA power system architectures (hybrid ac-dc architecture and HVdc architecture).
KW - More electric aircraft
KW - Reliability
KW - Hierarchical
KW - Power electronics
KW - hierarchical
KW - reliability
KW - contingency
KW - More electric aircraft (MEA)
KW - power electronics
UR - http://www.scopus.com/inward/record.url?scp=85067810613&partnerID=8YFLogxK
U2 - 10.1109/TPWRS.2019.2896454
DO - 10.1109/TPWRS.2019.2896454
M3 - Journal article
SN - 0885-8950
VL - 34
SP - 3264
EP - 3273
JO - I E E E Transactions on Power Systems
JF - I E E E Transactions on Power Systems
IS - 4
M1 - 8630045
ER -