为提高微电网应对新能源出力和负荷不确定性的能力,提出1种考虑灵活性资源的微电网优化控制策略。根据各类灵活性资源的源储荷特性进行分类,建立微电网双层优化调度模型。用户层引入用户侧灵活性资源,以用户费用和净负荷差值最小为优化...为提高微电网应对新能源出力和负荷不确定性的能力,提出1种考虑灵活性资源的微电网优化控制策略。根据各类灵活性资源的源储荷特性进行分类,建立微电网双层优化调度模型。用户层引入用户侧灵活性资源,以用户费用和净负荷差值最小为优化目标,决策变量为电动汽车和可平移负荷出力功率。源储层模型加入储能侧与发电侧灵活性资源,以微电网运营商成本和失负荷率最小为优化目标,决策变量为燃气轮机、主网联络线和储能单元出力功率。使用场景缩减的季节典型日数据进行算例仿真,采用改进后的基于分解的多目标进化MOEA/D(multi-objective evolutionary algorithm based on decomposition)算法对双层优化调度模型进行求解,年均用户费用降低6.85%,运营商年均总成本下降14.68%,年均失负荷率下降6.65%,验证了本文所提模型的合理性和有效性。展开更多
In recent years,gig economy jobs-particularly those of food delivery and ride-hailing drivers-have rapidly emerged as a significant force in the labor market,reflecting the deep integration of China’s digital and rea...In recent years,gig economy jobs-particularly those of food delivery and ride-hailing drivers-have rapidly emerged as a significant force in the labor market,reflecting the deep integration of China’s digital and real economies.This paper examines how digital platforms that support the gig economy exercise directionality and dominance in labor matching,where the platform dictates which consumers workers serve,rather than allowing independent choice.While this platform-led matching may appear to limit consumer and worker autonomy,it actually arises from the platform’s central role in information flow and its technological capabilities,serving as a foundation for the platform’s ability to create large-scale employment through cross-side network effects.Using a theoretical model that integrates digital platforms,labor markets,and product markets,the paper explores how the efficiency of targeted matching affects employment creation.In the early stages of gig economy development,when targeted matching efficiency is low,improvements in assignment efficiency lead to a net increase in gig employment,worker income,and overall social welfare.However,in the later stages,as targeted matching efficiency improves,the potential for monopoly abuse by incumbent platforms may trigger a crowding-out effect,leading to unemployment,income inequality between platforms and workers,and higher commission fees.While fostering competition within platform markets offers benefits,policymakers should avoid excessively low entry barriers,as these can negatively impact incumbent platforms’decisions regarding labor,pricing,and technology investment.展开更多
孤岛检测的方法很多,尤其是主动式孤岛检测方法。如何在众多的主动孤岛检测法中选择最合适的方法是应用中的难点。针对主动法中的应用较多的滑模频率偏移法和有源频率偏移法,分别对其检测盲区、检测速度、对电能质量影响进行机理分析。...孤岛检测的方法很多,尤其是主动式孤岛检测方法。如何在众多的主动孤岛检测法中选择最合适的方法是应用中的难点。针对主动法中的应用较多的滑模频率偏移法和有源频率偏移法,分别对其检测盲区、检测速度、对电能质量影响进行机理分析。理论分析结果表明在盲区相同时,SMS(Slip-Mode Frequency Shift)法造成的逆变电流总谐波含量更小,但SMS法的检测速度在不同参数条件下存在较大区别。在Matlab/Simulink中对孤岛检测方法进行建模,实验结果证明了理论分析的正确性。展开更多
文摘为提高微电网应对新能源出力和负荷不确定性的能力,提出1种考虑灵活性资源的微电网优化控制策略。根据各类灵活性资源的源储荷特性进行分类,建立微电网双层优化调度模型。用户层引入用户侧灵活性资源,以用户费用和净负荷差值最小为优化目标,决策变量为电动汽车和可平移负荷出力功率。源储层模型加入储能侧与发电侧灵活性资源,以微电网运营商成本和失负荷率最小为优化目标,决策变量为燃气轮机、主网联络线和储能单元出力功率。使用场景缩减的季节典型日数据进行算例仿真,采用改进后的基于分解的多目标进化MOEA/D(multi-objective evolutionary algorithm based on decomposition)算法对双层优化调度模型进行求解,年均用户费用降低6.85%,运营商年均总成本下降14.68%,年均失负荷率下降6.65%,验证了本文所提模型的合理性和有效性。
基金supported by the National Social Science Fund of China(NSSFC)General Project“Research on the Mechanism of Monopoly Formation and Anti-Monopoly Regulation from the Perspective of Digital Economy”(Grant No.22BJY116)the Guangdong Provincial Natural Science Fund for Distinguished Young Scholars“Research on Carbon Trading Mechanisms under the Generalized Carbon Leakage Risk”(Grant No.2023B1515020068)the National Natural Science Foundation of China(NSFC)Key Project“Research on the Theory,Mechanism and Model of State-Owned Capital Mergers and Acquisitions”(Grant No.72132010).
文摘In recent years,gig economy jobs-particularly those of food delivery and ride-hailing drivers-have rapidly emerged as a significant force in the labor market,reflecting the deep integration of China’s digital and real economies.This paper examines how digital platforms that support the gig economy exercise directionality and dominance in labor matching,where the platform dictates which consumers workers serve,rather than allowing independent choice.While this platform-led matching may appear to limit consumer and worker autonomy,it actually arises from the platform’s central role in information flow and its technological capabilities,serving as a foundation for the platform’s ability to create large-scale employment through cross-side network effects.Using a theoretical model that integrates digital platforms,labor markets,and product markets,the paper explores how the efficiency of targeted matching affects employment creation.In the early stages of gig economy development,when targeted matching efficiency is low,improvements in assignment efficiency lead to a net increase in gig employment,worker income,and overall social welfare.However,in the later stages,as targeted matching efficiency improves,the potential for monopoly abuse by incumbent platforms may trigger a crowding-out effect,leading to unemployment,income inequality between platforms and workers,and higher commission fees.While fostering competition within platform markets offers benefits,policymakers should avoid excessively low entry barriers,as these can negatively impact incumbent platforms’decisions regarding labor,pricing,and technology investment.
文摘孤岛检测的方法很多,尤其是主动式孤岛检测方法。如何在众多的主动孤岛检测法中选择最合适的方法是应用中的难点。针对主动法中的应用较多的滑模频率偏移法和有源频率偏移法,分别对其检测盲区、检测速度、对电能质量影响进行机理分析。理论分析结果表明在盲区相同时,SMS(Slip-Mode Frequency Shift)法造成的逆变电流总谐波含量更小,但SMS法的检测速度在不同参数条件下存在较大区别。在Matlab/Simulink中对孤岛检测方法进行建模,实验结果证明了理论分析的正确性。
