Mode Selection Strategy of Dual Distribution Channel Based on Revenue Analysis

Within the scope of dual distribution channel(DDC)modes—ME&T-C and M-T&E-C,a game model designed for channel members was proposed.Based on this game model,the game equilibrium under both centralized and decentralized decisionmaking situations was analyzed,the channel members' and overall revenues of two modes under the same decision-making situation are compared,and the influence of demand shift coefficient to the overall and members' revenue was also studied through example analysis.Based on the comparison and analysis of the revenue yielded from the two DDC modes,it's discovered that within a certain hypothetical range,the M-T&E-C mode seems to be a better option for the manufacturer than the ME&T-C mode.Therefore,this discovery can be served as a theoretical reference for manufacturers when choosing the optimal DDC mode in real life.

Single Source Self-Screen Jamming Elimination and Target Detection for Distributed Dual Antennas Radar System

Detecting target echo in the existence of self-screen jamming is a challenging work for radar system, especially when digital radio frequency memory(DRFM) technique is employed that mixes the jamming and target echo both in spatial and time-frequency domain. The conventional way to solve this problem would suffer from performance degradation when physical target(PT) and false target(FT) are superposed in time. In this paper, we propose a new spatial filter according to the different correlation characteristic between PT and FT. The filter takes the ratio of expected signal power to expected jamming and noise power as the objective function under the constant filter modulus constraint. The optimal filter coefficients are derived with a generalized rayleigh quotient approach. Moreover, we analytically compute the target detection probability and demonstrate the applicability of the proposed method to the correlation coefficient. Monte Carlo simulations are provided to corroborate the proposed studies. Furthermore, the proposed method has simple architecture and low computation complexity, making it easily applied in modern radar system.

基于分布鲁棒优化的发电商中长期合同电量分解模型

在我国中长期合同交易与现货市场衔接的政策背景下,中长期合同电量必须分解至短时间尺度。针对发电商中长期合同电量的自主分解问题,研究了发电商在现货市场价格严重不确定环境下基于分布鲁棒优化的中长期合同电量分解方法。首先,针对现货价格的严重不确定性,以Wasserstein距离作为分布函数距离测度,构建了现货价格分布不确定性的模糊集。其次,建立了发电商合同分解的分布鲁棒优化模型。以发电商利润最大化为目标,考虑发电商运行约束和合同分解约束,并采用对偶理论等将模型转化为可高效求解的二次规划问题。最后,通过算例仿真并与传统的随机优化和鲁棒优化模型进行对比。结果表明所提模型在处理现货价格不确定性时能有效兼顾发电商合同分解决策的经济性和鲁棒性。

考虑源荷双侧不确定的孤岛型微网能量管理优化模型

鉴于源侧风电出力和负荷侧预测误差的双重不确定性对微电网规划运行的影响愈发显著,采取分布式鲁棒优化联合机会约束方法对孤岛型微电网进行能量管理优化,降低系统运行成本,通过历史数据将风电出力和负荷侧预测误差转化为盒式模糊集,将机会约束转化为易求解的形式,建立了混合整数二阶锥规划模型。通过孤岛运行的微网算例分析及与其他优化方法的对比求解,验证了所提模型和求解策略的有效性。

考虑风电出力不确定的分布鲁棒经济调度

随着大规模可再生能源参与到电力系统运行中,其波动性和间歇性增加了电力系统经济调度的困难和挑战。考虑可再生能源出力不确定,以发电成本、可再生能源削减成本和旋转备用成本最小为目标,提出了一种两阶段分布鲁棒经济调度模型。假设风电发电的波动性服从未知概率分布,利用可获取的风电出力历史数据矩信息,建立分布鲁棒模糊集以刻画风电出力特性。采用条件风险价值理论对分布鲁棒模型进行转换,进而得到具有数学可解性的优化模型。基于随机对偶动态规划方法,提出一种改进的迭代算法求解模型,该算法通过反复进行向前和向后迭代,能够快速收敛到模型最优解。最后,以IEEE 6节点系统和IEEE 118节点系统作为仿真系统,通过分析文中所提算法收敛度、置信度和样本量3个评价指标与总成本关系,验证提出的模型和方法的有效性。