基于光伏并网逆变器的基本原理和拓扑结构,提出一种基于DSP的3 k W非隔离型光伏并网逆变器的设计。通过理论分析和计算,进行电路元件参数的设计,包括主电路参数、检测和保护电路、驱动电路的设计。搭建3 k W实验样机一台,样机实验表明,...基于光伏并网逆变器的基本原理和拓扑结构,提出一种基于DSP的3 k W非隔离型光伏并网逆变器的设计。通过理论分析和计算,进行电路元件参数的设计,包括主电路参数、检测和保护电路、驱动电路的设计。搭建3 k W实验样机一台,样机实验表明,该设计方案满足了逆变器的设计要求,能够实现安全、可靠并网运行,输出电流具有较低的谐波含量。展开更多
该文阐述了分布式静止串联补偿器(distributed static series compensator,DSSC)的研究现状和原理。提出了基于DSSC优选主电路拓扑的参数设计方法,以及DSSC的直流电压稳定、线路补偿控制策略。在RTDS实时仿真环境下建立仿真模型,从容性...该文阐述了分布式静止串联补偿器(distributed static series compensator,DSSC)的研究现状和原理。提出了基于DSSC优选主电路拓扑的参数设计方法,以及DSSC的直流电压稳定、线路补偿控制策略。在RTDS实时仿真环境下建立仿真模型,从容性、感性以不同工作状态之间的切换等几个方面,全面验证了DSSC本体控制策略与潮流调节功能,为后续研究和工程示范提供理论指导。展开更多
The goal of this work is creation of optimal grounding model at the substation 10/0.4 kV of the urban power distribution network. The electric current can pose a major threat to the man’s life and health. In addition...The goal of this work is creation of optimal grounding model at the substation 10/0.4 kV of the urban power distribution network. The electric current can pose a major threat to the man’s life and health. In addition to pose a threat for health, the rise of the short circuit, as a consequence of insulation faults, poses a threat to retirement of electric systems and fire risks. The reliable grounding system design has significant implications for protection of human being as well as for electrical facility protection. The set objective was performed on the base of analytical and software-based methods. Analytical method gives a qualitative indication at each step in analysis. It also allows evaluating the values effect on the result, but the method is not susceptible of tolerable accuracy, that is why analytical method serves as initial approximation in differentiating. Specified estimation can be performed in such software package as MATLAB or ETAP. Software-based estimation is based on the finite element method (FEM), the main advantage of which is the ability to create different forms of grounding and allows obtaining distribution graphs of the step potential on the earth’s surface and touch potential. The calculation results in comparison of analytical and software-based methods taking into account the grounding optimization. There are conclusions on the most effective ground network.展开更多
文摘基于光伏并网逆变器的基本原理和拓扑结构,提出一种基于DSP的3 k W非隔离型光伏并网逆变器的设计。通过理论分析和计算,进行电路元件参数的设计,包括主电路参数、检测和保护电路、驱动电路的设计。搭建3 k W实验样机一台,样机实验表明,该设计方案满足了逆变器的设计要求,能够实现安全、可靠并网运行,输出电流具有较低的谐波含量。
文摘该文阐述了分布式静止串联补偿器(distributed static series compensator,DSSC)的研究现状和原理。提出了基于DSSC优选主电路拓扑的参数设计方法,以及DSSC的直流电压稳定、线路补偿控制策略。在RTDS实时仿真环境下建立仿真模型,从容性、感性以不同工作状态之间的切换等几个方面,全面验证了DSSC本体控制策略与潮流调节功能,为后续研究和工程示范提供理论指导。
文摘The goal of this work is creation of optimal grounding model at the substation 10/0.4 kV of the urban power distribution network. The electric current can pose a major threat to the man’s life and health. In addition to pose a threat for health, the rise of the short circuit, as a consequence of insulation faults, poses a threat to retirement of electric systems and fire risks. The reliable grounding system design has significant implications for protection of human being as well as for electrical facility protection. The set objective was performed on the base of analytical and software-based methods. Analytical method gives a qualitative indication at each step in analysis. It also allows evaluating the values effect on the result, but the method is not susceptible of tolerable accuracy, that is why analytical method serves as initial approximation in differentiating. Specified estimation can be performed in such software package as MATLAB or ETAP. Software-based estimation is based on the finite element method (FEM), the main advantage of which is the ability to create different forms of grounding and allows obtaining distribution graphs of the step potential on the earth’s surface and touch potential. The calculation results in comparison of analytical and software-based methods taking into account the grounding optimization. There are conclusions on the most effective ground network.
