Abstract：Constant power loads (CPLs) have negative impedance characteristics, when the parameters of aircraft power supply system and its loads do not match, low-frequency oscillation will occur in certain conditions, even lead to the radiation of the entire system. To mitigate this oscillation, in this paper the equivalent circuit model is developed for the system, The corresponding transfer function is derived and the condition of stability is obtained. Finally, a systematic approach to stabilizing constant power loads with passive damping techniques is presented. the theoretical analysis is confirmed with simulation and experimental results.
黄建, 张震. 机载供电系统带恒功率负载稳定性[J]. 电工技术学报, 2011, 26(1增): 213-218.
Huang Jian, Zhang Zhen. Stability of Aircraft Power Supply System with Constant Power Loads. Transactions of China Electrotechnical Society, 2011, 26(1增): 213-218.
[1] Rivetta C, Williamson G A, Emadi A. Constant power loads and negative impedance instability in sea and undersea vehicles: statement of the problem and comprehensive large-signal solution[C]. IEEE Electric Ship Technologies Symposium, 2005: 313-320. [2] Emadi A, Khaligh A, Rivetta C H, et al. Constant power loads and negative impedance instability in automotive systems: definition, modeling, stability, and control of power electronic converters and motor drives[J]. IEEE Transactions on Vehicular Technology, 2006, 55(4): 1112-1125. [3] Vgrigore, Jhatonen, Jkyyra, et al. Dynamics of a buck converter with a constant power load[C]. IEEE 29th Power Electron Specialists Conference 1998: 72-78. [4] Middlebrook R D. Input filter consideration in design and application of switching regulators[C]. IEEE Industry Applications Society Annual Meeting, 1976: 366-382. [5] Feng Xiaogang, Liu Jinjun, Lee F C. Impedance specifications for stable DC distributed power systems[J]. IEEE Transaction Power Electron, 2002, 17(2): 157-162. [6] Liu Xinyun, Forsyth A J, Cross A M. Negative input resistance compensator for a constant power load[J]. IEEE Transaction Industry Electron, 2007, 54(6): 3188-3196. [7] Khaligh A, Rahimi A M, Emadi A. Modified pulse-adjustment technique to control DC-DC converters driving variable constant power loads[J]. IEEE Transaction Industry Electron, 2008, 55(3): 1133- 1146. [8] Rahimi A M, Emadi A. Active damping in DC-DC power electronic converters: a novel method to overcome the problems of constant power loads[J]. IEEE Transaction Industry Electron, 2009, 56(5): 1428-1439. [9] 朱成花, 严仰光. Boost变换器恒功率负载时动态性能分析[J]. 南京航空航天大学学报, 2005, 37(1)：20-24 Zhu Chenghua, Yan Yangguang. Stability and dynamics of Boost converter with constant power load[J]. Journals of Nanjing University of Aeronautics and Astronautics, 2005, 37(1): 20-24． [10] 王建华, 张方华, 龚春英, 等. 带恒功率负载的DC-DC变换器阶跃响应过程分析[J]. 中国电机工程学报, 2008, 28(30): 7-11. [11] Kondratiev I, Santi E, Dougal R, et al. Synergetic control for DC-DC buck converters with constant power load[C]. IEEE 35th Power Electronics Speccialists Conference, Aachen, Germany, 2004: 3758-3764. [12] Santi E, Li D, Monti A, et al. A geometric approach to large signal stability of switching converters under sliding mode control and synergetic control[C]. IEEE Power Electronics Specialists Conference, 2005: 1389-1395. [13] Rivetta C H, Emadi A, Williamson G A, et al. Analysis and control of a buck DC-DC converter operating with constant power load in sea and undersea vehicles[J]. IEEE Transaction Industry Applications, 2006, 42(2): 559-572. [14] Rahimi A M, Williamson G A, Emadi A. Loop- cancellation technique: A novel nonlinear feedback to overcome the destabilizing effect of constant-power loads[J]. IEEE Transactions on vehicular technology, 2010, 59 (2): 650-661. [15] Chandrasekaran S. Subsystem design in aircrft power distribution systems using optimization[D]. Department of Electrical an Computer Engineering, Viginia Tech, 2000: 27-57.
2011, Vol. 26 
