A power allocation scheme for multi-user multiple-input multiple-output orthogonal frequency division multiplexing （MI- MO-OFDM） systems with channel state information （CSI） on transmitter and receiver is pressed....A power allocation scheme for multi-user multiple-input multiple-output orthogonal frequency division multiplexing （MI- MO-OFDM） systems with channel state information （CSI） on transmitter and receiver is pressed. Multi-user lower allocation can be decoupled into single user lower allocation throughout null space mapping of multi-user channel and lower allocation can be performed throughout spatial-spectral water-filling for per user.To deal with more users in system and fading correlation,scheduling is oerformed to maintain the gain of power allocation.The proposed scheme can substantially improve system＇s spectral efficiency with low complexity.Simulation results validate the accuracy of theoretic analyses.展开更多
构网型储能的有功控制可为系统提供有效的频率支撑,但并联机组间控制策略不协调时,会引发荷电状态(state of charge,SOC)不均衡、低频振荡等问题。为此,首先建立了并联构网储能系统的状态空间模型,分析了控制参数对系统的频率稳定、振...构网型储能的有功控制可为系统提供有效的频率支撑,但并联机组间控制策略不协调时,会引发荷电状态(state of charge,SOC)不均衡、低频振荡等问题。为此,首先建立了并联构网储能系统的状态空间模型,分析了控制参数对系统的频率稳定、振荡抑制等性能的影响,并研究了并联机组间的有功分配机理。在此基础上,提出了适用于并联构网型储能系统的协调有功控制策略。最后,利用Matlab/Simulink的数字仿真与基于RT-LAB的硬件在环平台验证了所提控制策略的有效性。研究结果表明:所提方法在保证频率安全稳定的基础上,有效实现了并联储能机组间SOC均衡、功率分配优化以及振荡抑制的效果。展开更多
基金This project was supported bythe National Natural Science Foundation of China (60272079) the National High Technol-ogy Research and Development Plan Project of China (2001AA123014) .
文摘A power allocation scheme for multi-user multiple-input multiple-output orthogonal frequency division multiplexing （MI- MO-OFDM） systems with channel state information （CSI） on transmitter and receiver is pressed. Multi-user lower allocation can be decoupled into single user lower allocation throughout null space mapping of multi-user channel and lower allocation can be performed throughout spatial-spectral water-filling for per user.To deal with more users in system and fading correlation,scheduling is oerformed to maintain the gain of power allocation.The proposed scheme can substantially improve system＇s spectral efficiency with low complexity.Simulation results validate the accuracy of theoretic analyses.
文摘构网型储能的有功控制可为系统提供有效的频率支撑,但并联机组间控制策略不协调时,会引发荷电状态(state of charge,SOC)不均衡、低频振荡等问题。为此,首先建立了并联构网储能系统的状态空间模型,分析了控制参数对系统的频率稳定、振荡抑制等性能的影响,并研究了并联机组间的有功分配机理。在此基础上,提出了适用于并联构网型储能系统的协调有功控制策略。最后,利用Matlab/Simulink的数字仿真与基于RT-LAB的硬件在环平台验证了所提控制策略的有效性。研究结果表明:所提方法在保证频率安全稳定的基础上,有效实现了并联储能机组间SOC均衡、功率分配优化以及振荡抑制的效果。
