Recently,power electronic transformers(PETs)have received widespread attention owing to their flexible networking,diverse operating modes,and abundant control objects.In this study,we established a steady-state model ...Recently,power electronic transformers(PETs)have received widespread attention owing to their flexible networking,diverse operating modes,and abundant control objects.In this study,we established a steady-state model of PETs and applied it to the power flow calculation of AC-DC hybrid systems with PETs,considering the topology,power balance,loss,and control characteristics of multi-port PETs.To address new problems caused by the introduction of the PET port and control equations to the power flow calculation,this study proposes an iterative method of AC-DC mixed power flow decoupling based on step optimization,which can achieve AC-DC decoupling and effectively improve convergence.The results show that the proposed algorithm improves the iterative method and overcomes the overcorrection and initial value sensitivity problems of conventional iterative algorithms.展开更多
Based on the general methods in power flow calculation of power system and on conceptions and classifications of parallel algorithm, a new approach named Dynamic Asynchronous Parallel Algorithm that applies to the onl...Based on the general methods in power flow calculation of power system and on conceptions and classifications of parallel algorithm, a new approach named Dynamic Asynchronous Parallel Algorithm that applies to the online analysis and real-time dispatching and controlling of large-scale power network was put forward in this paper. Its performances of high speed and dynamic following have been verified on IEEE-14 bus system.展开更多
随着电力系统的快速发展和复杂性日益增加,最优潮流(Optimal Power Flow,OPF)计算作为电力系统分析的关键环节,对于提高电网的运行效率和可靠性具有重要意义。文章提出了一种基于自适应人工蛙跳觅食算法的最优潮流计算方法,旨在解决传...随着电力系统的快速发展和复杂性日益增加,最优潮流(Optimal Power Flow,OPF)计算作为电力系统分析的关键环节,对于提高电网的运行效率和可靠性具有重要意义。文章提出了一种基于自适应人工蛙跳觅食算法的最优潮流计算方法,旨在解决传统最优潮流计算方法在处理大规模非线性问题时的不足。为了解决算法在处理复杂电力系统问题时存在收敛速度慢和易陷入局部最优的问题,文章引入自适应策略,通过动态调整算法参数,提高算法的全局搜索能力和收敛速度。仿真实验结果表明,所提出的方法在解的质量、收敛速度和算法稳定性方面均表现出显著的优势。展开更多
基金supported by the National Key Research and Development Program of China(2017YFB0903300).
文摘Recently,power electronic transformers(PETs)have received widespread attention owing to their flexible networking,diverse operating modes,and abundant control objects.In this study,we established a steady-state model of PETs and applied it to the power flow calculation of AC-DC hybrid systems with PETs,considering the topology,power balance,loss,and control characteristics of multi-port PETs.To address new problems caused by the introduction of the PET port and control equations to the power flow calculation,this study proposes an iterative method of AC-DC mixed power flow decoupling based on step optimization,which can achieve AC-DC decoupling and effectively improve convergence.The results show that the proposed algorithm improves the iterative method and overcomes the overcorrection and initial value sensitivity problems of conventional iterative algorithms.
文摘Based on the general methods in power flow calculation of power system and on conceptions and classifications of parallel algorithm, a new approach named Dynamic Asynchronous Parallel Algorithm that applies to the online analysis and real-time dispatching and controlling of large-scale power network was put forward in this paper. Its performances of high speed and dynamic following have been verified on IEEE-14 bus system.
文摘随着电力系统的快速发展和复杂性日益增加,最优潮流(Optimal Power Flow,OPF)计算作为电力系统分析的关键环节,对于提高电网的运行效率和可靠性具有重要意义。文章提出了一种基于自适应人工蛙跳觅食算法的最优潮流计算方法,旨在解决传统最优潮流计算方法在处理大规模非线性问题时的不足。为了解决算法在处理复杂电力系统问题时存在收敛速度慢和易陷入局部最优的问题,文章引入自适应策略,通过动态调整算法参数,提高算法的全局搜索能力和收敛速度。仿真实验结果表明,所提出的方法在解的质量、收敛速度和算法稳定性方面均表现出显著的优势。
