Control, Design and Optimization of Electrical Power Systems for More Electric Aircraft

More-Electric飞机(MEA)的研究领域着眼于利用推进发动机产生的电能为飞机上的非推进系统提供动力。飞机上非推进式发电机的一些例子是液压、气动、机械和电力系统。目前的飞机，如波音787，都有混合动力系统，但电气系统的每个部件都根据制造规范和波音规范进行局部优化。虽然这在实践中是可行的，但作为一个整体，它不会带来最好的表现。局部优化的组件在其自身方面应该工作得很好，但包括许多局部优化的子系统，那么干扰、功率损失、谐波失真……(清单还在继续)开始影响系统的整体性能。因此，在单个系统中具有许多这些局部优化的设备增加了所观察到的性能阻碍特性的总体效果。因此，开发一个对所有子系统进行完全优化的电气系统在理论上应该显著提高性能。本研究项目应该探索进行集成设计的优势和障碍，其中考虑到所有子系统的干扰，整个系统已经作为一个整体进行了优化。由于这样的设计是为飞机应用而设计的，这样的系统的设计和优化必须考虑到总体重量、电源质量、故障保险和安全性。这项研究的长期目标是向飞机制造商展示将完全优化的系统整合到商用飞机中的优势，就像目前对MEA的研究导致了B787的开发一样。这将导致企业将电力系统作为一个单一的优化系统来制造和安装，而不是购买许多本地优化的子系统并将它们组装在一起。这项研究的益处可导致甚至更有效率的飞机，全世界正在努力减少整个碳排放；增加飞机的可能航程，这直接导致减少飞机的总重量；减少喷气发动机的燃料消耗；提高飞机的可靠性，因为电气设备故障的冗余度小于机械和液压冗余度，还包括电子部件故障率逐年提高的事实。所有这些因素还将导致业务和维护费用的减少。这对消费者来说，可能会导致更低的长途旅行票价。

The research area of More-Electric Aircraft (MEA) looks into the utilization of electrical power generated by the propulsion engines to power the non-propulsive systems on-board the aircraft. Some examples of non-propulsive power generators on aircraft are hydraulic power, pneumatic power, mechanical power and electrical power systems.Currently aircraft such as the Boeing 787 have hybrid power systems, but each component of the electrical system is locally optimised according to the manufacture specification, and also Boeing specifications. Although this works in practise, it's not going to be giving the best performance as a whole. A component which is locally optimised should work very well in its own regard, but including many locally optimised sub-systems then interference, power loss, harmonic distortions... (and the list carries on) begins to effect the overall performance of the system. Having many of these locally optimised devices in a single system therefore increases the overall effect of the performance impeding characteristics observed. Therefore, developing an electrical system with full optimisation for all sub-systems should in theory improve performance significantly.This research project should explore the advantages and barriers for conducting an integrated design, for which all sub-system interractions are accounted for, for which whole system has been optimised as a whole. As such a design is intended for aircraft applications, design and optimisation of such a system must have concideration of overall weight, power quality, fail-safes and safety.The long term goal of this research is to show aircraft manufactures the advantages of incorporating a fully optimised system into commercial aircraft, like current research into MEA had led to the development of the B787. This would lead companies to manufacture and install electrical systems as a single optimised system other than purchasing many locally optimised sub-systems and putting them together. The benefits from this research could result in even more efficient aircraft, where the world is trying to reduce carbon emissions as a whole; increase the possible range of aircraft as a direct result in reduction of overall weight of aircraft a reduction in fuel burn of the jet engines; increased reliability of aircraft as redundancy of failure in electrical equipment is less than that for mechanical and hydraulic redundancy, including also the fact that electronic components are year on year having improved failure rates. All these factors will also result in reductions in operational and maintenance costs. This, then to the consumer could result in lower fares for longer distance travel.