基于二阶锥规划法的高受电比例电网运行稳定性研究

为控制高受电比例电网电力传输的高频波动,提升电网运行稳定性,进行基于二阶锥规划法的高受电比例电网运行稳定性研究。通过分布式电源搭建、直流母线电路连接、二阶锥微电网组织设计3个物理步骤,进行基于二阶锥规划法的电网结构规划。根据电网结构规划结果,按照电网运行的暂态稳定模式,通过同时限定受电高阶比例上、下边界条件的方式,根据电网负荷水平控制电力传输高频波动,完成基于二阶锥规划法的高受电比例电网运行稳定性研究。实验结果表明,与PSASP控制技术相比,研究方法的高压传输波长下降、相邻峰谷值间隔周期延长,高受电比例电网电力传输的高频波动得到有效抑制,电网运行稳定性更高。

考虑供需互动的含分布式电源配电网网架规划

通过分析供应侧电源出力特性和需求侧负荷响应特性,搭建了考虑DG主动管理和需求侧管理的配电网网架双层规划模型。上层以年初始投资成本最小化为目标函数,考虑了网络辐射状连通性约束;下层以综合运行成本最小化为目标函数,考虑了网络潮流、安全运行等约束。上下层模型分别采用Prim最小生成树算法及二阶锥规划法进行求解。最后结合某地区29节点配电网进行仿真验证,结果表明,该模型能有效促进DG消纳,提升含DG配电网规划的经济性。

近似完全重构IIR余弦调制滤波器组的优化设计

提出一种新的近似完全重构因果稳定的IIR余弦调制滤波器组的设计方法。基于预先给定的极点值,IIR原型滤波器的设计问题可以简化成一个凸极大值极小化的优化问题,从而采用二阶锥规划法求解。所得余弦调制滤波器组具有良好的频率特性和合理的完全重构误差。所设计的原型滤波器是因果稳定的,并且其多相因子分母相同,简化了完全重构条件,可以用来进一步优化得到的完全重构系统。

Robust Blind Separation for MIMO Systems against Channel Mismatch Using Second-Order Cone Programming

To improve the deteriorated capacity gain and source recovery performance due to channel mismatch problem,this paper reports a research about blind separation method against channel mismatch in multiple-input multiple-output(MIMO) systems.The channel mismatch problem can be described as a channel with bounded fluctuant errors due to channel distortion or channel estimation errors.The problem of blind signal separation/extraction with channel mismatch is formulated as a cost function of blind source separation(BSS) subject to the second-order cone constraint,which can be called as second-order cone programing optimization problem.Then the resulting cost function is solved by approximate negentropy maximization using quasi-Newton iterative methods for blind separation/extraction source signals.Theoretical analysis demonstrates that the proposed algorithm has low computational complexity and improved performance advantages.Simulation results verify that the capacity gain and bit error rate(BER) performance of the proposed blind separation method is superior to those of the existing methods in MIMO systems with channel mismatch problem.