The influence of low-frequency sonolysis on the kinetics bimolecular liquid-phase reactions was studied with due regard for the association (dimers and trimers) of starting reagents. The mathematical modeling of chemi...The influence of low-frequency sonolysis on the kinetics bimolecular liquid-phase reactions was studied with due regard for the association (dimers and trimers) of starting reagents. The mathematical modeling of chemical reactions that were described by nonlinear differential equations is performed. The steady states, the singular points characteristics, the nature of concentration oscillations in the reaction system are described. With increasing frequency and amplitude of low-frequency sonic waves (up to some critical value), we observed the cessation of the reaction. This observation offers an additional tool for controlling reaction rate by the external action of low-frequency vibrations. The conclusions of the work are obtained under certain assumptions. The exact determination of the critical conditions for changes in dynamics is beyond the scope of the problem.展开更多
近年来,南方电网发生了数起地区电网低频振荡事件,并波及到主网联络线。为此,对3起典型的地区电网低频振荡事件进行了分析,总结出这些地区电网低频振荡的共性原因:中、小水电富集,需要大量送出;电网结构薄弱、输电距离长;地区机组的电...近年来,南方电网发生了数起地区电网低频振荡事件,并波及到主网联络线。为此,对3起典型的地区电网低频振荡事件进行了分析,总结出这些地区电网低频振荡的共性原因:中、小水电富集,需要大量送出;电网结构薄弱、输电距离长;地区机组的电力系统稳定器(power system stabilizer,PSS)未投入;线路、断面潮流超过稳定极限等。提出了地区电网低频振荡的综合治理措施:对中、小水电机组配置和投入PSS,加快小水电富集地区高电压等级电网的建设进度,加强电网动态稳定分析,合理安排地区电网运行方式。展开更多
文摘The influence of low-frequency sonolysis on the kinetics bimolecular liquid-phase reactions was studied with due regard for the association (dimers and trimers) of starting reagents. The mathematical modeling of chemical reactions that were described by nonlinear differential equations is performed. The steady states, the singular points characteristics, the nature of concentration oscillations in the reaction system are described. With increasing frequency and amplitude of low-frequency sonic waves (up to some critical value), we observed the cessation of the reaction. This observation offers an additional tool for controlling reaction rate by the external action of low-frequency vibrations. The conclusions of the work are obtained under certain assumptions. The exact determination of the critical conditions for changes in dynamics is beyond the scope of the problem.
文摘近年来,南方电网发生了数起地区电网低频振荡事件,并波及到主网联络线。为此,对3起典型的地区电网低频振荡事件进行了分析,总结出这些地区电网低频振荡的共性原因:中、小水电富集,需要大量送出;电网结构薄弱、输电距离长;地区机组的电力系统稳定器(power system stabilizer,PSS)未投入;线路、断面潮流超过稳定极限等。提出了地区电网低频振荡的综合治理措施:对中、小水电机组配置和投入PSS,加快小水电富集地区高电压等级电网的建设进度,加强电网动态稳定分析,合理安排地区电网运行方式。