基于跨层安全机制的异构Mesh微电网分布式协同控制研究

本项目从微电网信息系统的安全和控制出发，考虑其跨层安全问题，研究具有普适意义的异构Mesh微电网信息系统的物理层和网络层安全控制策略。主要内容包括：在物理通道上，分别针对微电网外/内部存在窃听时，考虑多跳分布式电源节点的典型通信场景，研究发送预编码和人工噪声分布式协同优化，考虑最小安全速率最大化问题的分块优化方案，求解凸性的变量分块函数可行域中稳态解，获取混合电力线和无线模式的鲁棒协同物理层安全机制；在网络层上，分别针对交流和直流微电网，利用图论和测度论来描绘基于物理层安全机制的跨层链路置信度，分析跟踪误差的收敛性，设计辅助控制变量以刻画网络层自信度、他信度，从而建立基于跨层安全的微电网频率/电压/电流的分布式协同控制协议。本项目针对微电网信息系统的跨层安全，开展跨层协同、层层递进的理论研究与仿真验证，可望解决以往割裂不同层级安全研究的弊病，填补无物理层和网络层的跨层协同安全研究的空白。

Based on the security and control of micro grid information system, this researchs focuses on physical-layer and network-layer control strategy of heterogeneous mesh micro grid to solve cross-layer security issues. On the physical layer, we investigated the physical layer security mechanism of hybrid power line channel and wireless channel for multiple-hop micro power grid communications between distributed generators (DGs). For securing the confidentiality of signals between DGs in the presence of both external and internal eavesdroppers, a joint optimization scheme of transmitting precoding and artificial noise will be proposed, on which we will consider a maximization problem of the minimum security rate optimization problem and solve the steady-state solution to block convex function. On the network layer, we will propose a distributed cooperative control protocol of frequency/voltage/current based on cross-layer security for both alternating current and direct current micro power grid. We will use graph theory and measure theory to describe the physical layer security mechanism based on cross-layer link degree of confidence, analyse the convergence of tracking error and design auxiliary control variables to describe the confidential factor and trust factor of network layer. Aiming at the cross-layer security of micro grid information system, this project will carry out the investigaion and simulation of cross-layer cooperative and layers of progressive, which is expected to solve the shortcomings of previous security researches that separate different layers, and supply a gap of cross-layer cooperative security research.