The optimal tracking performance for integrator and dead time plant in the case where plant uncertainty and control energy constraints are to be considered jointly is inrestigated. Firstly, an average cost function of...The optimal tracking performance for integrator and dead time plant in the case where plant uncertainty and control energy constraints are to be considered jointly is inrestigated. Firstly, an average cost function of the tracking error and the plant input energy over a class of stochastic model errors are defined. Then, we obtain an internal model controller design method that minimizes the average performance and further studies optimal tracking performance for integrator and dead time plant in the simultaneous presence of plant uncertainty and control energy constraint. The results can be used to evaluate optimal tracking performance and control energy in practical designs.展开更多
配电变压器是电能供给和需求的交汇点,也是配电网故障、电能质量等不利因素对源网荷储产生影响的集散点,但存在不可控、无故障隔离与穿越能力等缺点,难以实现源网荷储的灵活调控与优化运行。近年来,国内外学者针对柔性可控的混合式配电...配电变压器是电能供给和需求的交汇点,也是配电网故障、电能质量等不利因素对源网荷储产生影响的集散点,但存在不可控、无故障隔离与穿越能力等缺点,难以实现源网荷储的灵活调控与优化运行。近年来,国内外学者针对柔性可控的混合式配电变压器(hybrid distribution transformer,HDT)技术开展了广泛研究,并提出一系列拓扑及控制方法,但未对相关研究工作进行系统地归纳整理与分析总结。为此,该文首先分析面向新能源配电网的HDT应用需求,回顾现有HDT发展历史,对HDT涉及的关键技术,尤其是工频变压器和变流器串并联集成的HDT拓扑结构、装置级和变流器级的控制保护协调技术、工频变压器与变流器集成化及关键部件设计、HDT技术标准化情况等进行梳理和总结。最后,对HDT发展存在的关键制约因素及未来发展方向进行讨论和展望,以期为面向新型配电网的智能配电变压器的发展与研究提供新思路。展开更多
基金the High Technology Research and Development (863) Program (2003AA517020).
文摘The optimal tracking performance for integrator and dead time plant in the case where plant uncertainty and control energy constraints are to be considered jointly is inrestigated. Firstly, an average cost function of the tracking error and the plant input energy over a class of stochastic model errors are defined. Then, we obtain an internal model controller design method that minimizes the average performance and further studies optimal tracking performance for integrator and dead time plant in the simultaneous presence of plant uncertainty and control energy constraint. The results can be used to evaluate optimal tracking performance and control energy in practical designs.
文摘配电变压器是电能供给和需求的交汇点,也是配电网故障、电能质量等不利因素对源网荷储产生影响的集散点,但存在不可控、无故障隔离与穿越能力等缺点,难以实现源网荷储的灵活调控与优化运行。近年来,国内外学者针对柔性可控的混合式配电变压器(hybrid distribution transformer,HDT)技术开展了广泛研究,并提出一系列拓扑及控制方法,但未对相关研究工作进行系统地归纳整理与分析总结。为此,该文首先分析面向新能源配电网的HDT应用需求,回顾现有HDT发展历史,对HDT涉及的关键技术,尤其是工频变压器和变流器串并联集成的HDT拓扑结构、装置级和变流器级的控制保护协调技术、工频变压器与变流器集成化及关键部件设计、HDT技术标准化情况等进行梳理和总结。最后,对HDT发展存在的关键制约因素及未来发展方向进行讨论和展望,以期为面向新型配电网的智能配电变压器的发展与研究提供新思路。
