针对微电网下电力系统通信易受到拒绝服务攻击(denial of service attack,DoS)、局部信息不开放以及通信带宽受限等问题,提出了一种基于DoS攻击的分布式事件触发的无模型预测补偿能量优化管理控制方法。首先,为了优化微电网能量供给并...针对微电网下电力系统通信易受到拒绝服务攻击(denial of service attack,DoS)、局部信息不开放以及通信带宽受限等问题,提出了一种基于DoS攻击的分布式事件触发的无模型预测补偿能量优化管理控制方法。首先,为了优化微电网能量供给并使得获利最大,给出考虑微电网功率损失的维持供需平衡的最小成本函数;其次,将微电网中的每个部分看作一个智能体并考虑了通信带宽受限问题,提出了一种分布式事件触发一致性算法;随后,提出一种基于输入输出数据的无模型预测控制算法,利用跟踪攻击前时刻的供需不匹配功率来预测补偿当前时刻及其后多个时刻的智能体功率数据缺失;最后,通过仿真实例验证所提出的基于分布式事件触发一致性预测补偿的微电网能量管理方法的有效性。展开更多
When modeling wave propagation in infinite space, it is necessary to have stable absorbing boundaries to effectively eliminate spurious reflections from the truncation boundaries. The SH wave equations for Perfectly M...When modeling wave propagation in infinite space, it is necessary to have stable absorbing boundaries to effectively eliminate spurious reflections from the truncation boundaries. The SH wave equations for Perfectly Matched Layers （PML） are deduced and their Crank-Nicolson scheme are presented in this paper. We use the second-, sixth-, and tenth-order finite difference and pseudo-spectral algorithms to compute the spatial derivatives. Two numerical models, a homogeneous isotropic medium and a multi-layer model with a cave, are designed to investigate how the absorbing boundary width and the algorithms determine PML effects. Numerical results show that, for PML, the low-order finite difference algorithms have fairly good absorbing effects when the absorbing boundary is thin, whereas, high-order algorithms always have good absorption when the boundary is thick. Finally, we discuss the reflection coefficient and point out its shortcomings, which is why we use the SNR to quantitatively scale the PML effects,展开更多
文摘针对微电网下电力系统通信易受到拒绝服务攻击(denial of service attack,DoS)、局部信息不开放以及通信带宽受限等问题,提出了一种基于DoS攻击的分布式事件触发的无模型预测补偿能量优化管理控制方法。首先,为了优化微电网能量供给并使得获利最大,给出考虑微电网功率损失的维持供需平衡的最小成本函数;其次,将微电网中的每个部分看作一个智能体并考虑了通信带宽受限问题,提出了一种分布式事件触发一致性算法;随后,提出一种基于输入输出数据的无模型预测控制算法,利用跟踪攻击前时刻的供需不匹配功率来预测补偿当前时刻及其后多个时刻的智能体功率数据缺失;最后,通过仿真实例验证所提出的基于分布式事件触发一致性预测补偿的微电网能量管理方法的有效性。
基金supported jointly by the 973 Program (Grant No.2007CB209505)the National Natural Science Fund (Grant No.40704019,40674061)+1 种基金the School Basic Research Fund of Tsinghua University (JC2007030)PetroChina Innovation Fund (Grant No.060511-1-1)
文摘When modeling wave propagation in infinite space, it is necessary to have stable absorbing boundaries to effectively eliminate spurious reflections from the truncation boundaries. The SH wave equations for Perfectly Matched Layers （PML） are deduced and their Crank-Nicolson scheme are presented in this paper. We use the second-, sixth-, and tenth-order finite difference and pseudo-spectral algorithms to compute the spatial derivatives. Two numerical models, a homogeneous isotropic medium and a multi-layer model with a cave, are designed to investigate how the absorbing boundary width and the algorithms determine PML effects. Numerical results show that, for PML, the low-order finite difference algorithms have fairly good absorbing effects when the absorbing boundary is thin, whereas, high-order algorithms always have good absorption when the boundary is thick. Finally, we discuss the reflection coefficient and point out its shortcomings, which is why we use the SNR to quantitatively scale the PML effects,
