【作者】 张思耕；

【导师】 姚文熙；

【作者基本信息】 浙江大学 ， 电气工程， 2022， 硕士

【摘要】 为缓解化石燃料的大量使用带来的资源枯竭、环境污染、能源安全等问题,我国相继提出了“能源互联网”、“碳达峰”、“碳中和”等战略。在此背景下,光伏、风电等分布式可再生能源以及配套的储能设备大量接入电网,一定程度上改变了电网的供电形式、能量流动方向,给传统电网带来了压力与挑战。电能路由器作为未来能源互联网中的关键设备,可以提供多种不同电压等级的端口,并具有主动的能量管理能力和良好的分布式新能源消纳能力,因此受到了广泛关注。针对电能路由器对各端口进行能量控制时所面临的经济性、稳定性等问题,本文根据不同类型电能路由器的变流器特性对其能量控制策略展开研究,主要内容如下:首先,对区域电能路由器进行了原理分析。介绍了不同应用场景下的电能路由器分类与拓扑选择,对区域电能路由器的拓扑结构进行了分析与建模,介绍了其调制方案与控制策略,并进行了仿真验证。其次,提出了一种计及区域电能路由器使用寿命能量调度策略。基于电能路由器的失效因素,通过损耗和热分析,建立运行功率与预期寿命之间的关系,进而将模块寿命折算进系统运行成本的目标函数中,从而提出一种计及区域电能路由器使用寿命的能量控制策略。该策略可以延长电力电子设备的寿命,提高系统可靠性。再次,设计了针对家庭电能路由器的三层能量控制策略。设计了一种基于多端口变换器拓扑的应用于家庭微网的家庭电能路由器,可接入光伏、混合储能等设备,并对其进行了建模与参数设计。通过对家庭电能路由器不同时间尺度的工作状态分析,为其设计了三层能量控制策略,可以在不同时间尺度上对家用电能路由器进行能量管理。通过该控制策略可实现家庭微网的稳定、经济运行。最后,对所提出的家庭电能路由器拓扑与控制方案进行了仿真建模与样机设计,通过仿真与实验验证了所提出的能量控制策略的有效性。更多还原

【Abstract】 In order to alleviate the problems of resource depletion,environmental pollution,and energy security caused by the massive use of fossil fuels,China government has proposed many strategies such as "Energy Internet","Peak Carbon Dioxide Emissions",and "Carbon Neutrality" successively.Under this background,large numbers of distributed renewable energy sources such as photovoltaics and wind power,as well as energy storage equipment,have been connected to the grid,which have changed the power supply form and energy flow direction of the grid to a certain extent,and have brought pressure and challenges to the traditional grid.As the key device in the future Energy Internet,energy router can provide ports of different voltage levels,with active energy management capabilities and good distributed new energy consumption capabilities.Because of that,energy router has received widespread attention.Aiming at the problems of economy and stability faced by the energy router in energy management of each port,the energy control strategies of different types of energy routers are studied according to the converter characteristic in this paper.The main contents are as follows:Firstly,the principle of regional energy router is analyzed.This paper introduces the classification and topology selection of energy router in different application scenarios.The topology of regional energy router is analyzed and modeled.The modulation scheme and control strategy are introduced and simulation verification is carried out.Secondly,an energy scheduling strategy that takes into account the service life of regional energy router is proposed.Based on the failure factors of the energy router,the relationship between the operating power and the expected life is established through loss and thermal analysis.Then,the module life is converted into the objective function of the system operating cost,and an energy control strategy that takes into account the service life of the regional energy router is proposed.This strategy can prolong the life of power electronic equipment and improve system reliability.Thirdly,a three-layer energy control strategy for home power routers is designed.A home energy router based on multi-port converter applied to the home microgrid is designed.It can be connected to photovoltaic,hybrid energy storage and other equipments.The modeling and parameter design are also carried out.By analyzing the working status of the home energy router at different time scales,a three-layer energy control strategy is designed.The proposed strategy can manage the energy of the home energy router on different time scales such as day-hour-second.Through this strategy,the stable and economical operation of the home microgrid can be realized.Finally,simulation modeling and prototype of the proposed home energy router topology and control strategy are designed.The effectiveness of the proposed energy control strategy is verified through simulation and experiment results.更多还原