Development of dynamic phasors for the modelling of aircraft electrical power systems
Development of dynamic phasors for the modelling of aircraft electrical power systems
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开发用于飞机电力系统建模的动态相量
DOI：
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发表时间：
2013
期刊：
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通讯作者：
Tao Yang
中科院分区：
文献类型：
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作者：
Tao Yang
由于多电飞机(MEA)已被确定为未来飞机的主要趋势，机载电力系统(EPS)将看到电力电子转换器(PECS)和电机驱动系统的数量显著增加。为了研究电动助力转向系统在MEA中的行为和性能，需要在系统设计过程中进行广泛的仿真研究。这反过来又需要计算高效和准确的模型，以缩短设计周期。本文采用动态相量(DP)对MEA中的EPS进行建模。DP技术是一种通用的平均方法，自然也是一种频域分析工具。与其他仅在均衡条件下有效的平均模型相比，DP模型在均衡和非均衡条件下都保持了效率。DP技术已被广泛应用于恒定、单频EPS的建模。本文将动态规划技术扩展到时变频率EPS的建模中。本文首次将动态规划方法应用于多机多频系统的建模。发展的理论使DPS有了更广泛的应用。所开发的DP模型涵盖了中东和非洲地区电力系统的关键要素，包括同步发电机、控制、输电线路、不受控整流器、PWM变流器和18脉冲自耦变压器整流单元。在此基础上开发的DP模型库，通过集成库中的元素，可以灵活地研究不同的EPS。以基于更加开放的电气技术(MOET)的大型飞机EPS体系结构的双发电机飞机EPS为例，演示了DP模型的应用。将DP模型与ABC模型(三相坐标系下的模型)和DQ0模型(同步DQ坐标系下的模型)进行了比较，验证了DP模型在平衡和不平衡条件下的有效性和准确性。
As the More-Electric Aircraft (MEA) has been identified as a major trend of future aircraft, the on-board Electrical Power System (EPS) will see significant increased numbers of Power Electronic Converters (PECs) and motor drive systems. In order to study the behaviour and performance of the EPS in MEA, extensive simulation studies need to be done during the system design process. This in return, gives the need to have computationally efficient and accurate models to reduce the design period. In this thesis, the Dynamic Phasor (DP) is used for modelling EPS in the MEA. The DP technique is a general averaging method and naturally a frequency-domain analysis tool. Compared with other averaging models, which is only efficient under balanced conditions, the DP model maintains efficiency under both balanced and unbalanced conditions. The DP technique has been widely used in modelling the constant, single frequency EPS. In this thesis, the DP technique is extended to modelling time-varying frequency EPS. The application of DP in modelling a multi-generator, multi-frequency system is for the first time, developed in this thesis. The developed theory allows a wider application of the DPs. The developed DP model covers key elements in MEA electrical power systems, including the synchronous generator, control, transmission lines, uncontrolled rectifiers, PWM converters and 18-pulse autotransformer rectifier units. The DP model library developed based on this thesis allows the flexibility to study various EPS’s by integrating elements from the library. A twin-generator aircraft EPS, which is based on the More Open Electrical Technology (MOET) large aircraft EPS architecture, is used to demonstrate the application of DP models. Comparing the DP model with the ABC model (models in three-phase coordinates) and the DQ0 model (models in a synchronous dq frame), the efficiency and the accuracy of the DP model are demonstrated under both balanced and unbalanced conditions.