综合能源系统(integrated energy system, IES)是未来能源消费方式的重要发展方向,对提升能源的综合用能能效和可再生能源的消纳将发挥越来越重要的作用。然而,由于IES中能源系统的高度耦合以及源-网-荷-储各个环节存在的不确定性,使得...综合能源系统(integrated energy system, IES)是未来能源消费方式的重要发展方向,对提升能源的综合用能能效和可再生能源的消纳将发挥越来越重要的作用。然而,由于IES中能源系统的高度耦合以及源-网-荷-储各个环节存在的不确定性,使得IES的动态过程极其复杂,给IES的优化运行带来巨大挑战。针对IES的优化运行问题,首先简要介绍了IES的概念,分析了其主要特点;其次总结和概括了IES运行基础信息感知、混合时间尺度动态协调优化调度体系及其求解算法三个方面的国内外研究现状,并指出了现有研究的不足之处;最后展望了IES优化运行未来的研究方向,为该方向的后续研究提供参考。展开更多
This paper proposes an economic optimization method with two time scales for a hybrid energy system based on the virtual storage characteristic of a thermostatically controlled load(TCL). The optimization process incl...This paper proposes an economic optimization method with two time scales for a hybrid energy system based on the virtual storage characteristic of a thermostatically controlled load(TCL). The optimization process includes two time scales in order to ensure accuracy and efficiency. Based on the forecast load and energy supply of the system, the first time scale is day-ahead economic operating optimization, carried out to determine the minimum operating cost for the whole day, and to find the period of greatest cost to which the second time scale optimization is applied. Using the virtual storage characteristic, the second time scale is short-term detailed optimization carried out for these particular hours. By dispatching thermal load in this period and adjusting energy supply accordingly, we can find the optimal economic performance, and customer requests are taken into account to ensure satisfaction. A case study in Tianjin, China illustrates the effectiveness of this method and proves that a TCL can make a great contribution to improving the economic performance of a hybrid energy system.展开更多
针对用户级综合能源系统(integrated energy system,IES)规模小,能量耦合复杂的特点,建立一种考虑能量特性差异的混合时间尺度经济调度模型。首先,在日前尺度中,对电、冷、热能以相同的时间分辨率进行协调优化,同时为了应对各类预测误差...针对用户级综合能源系统(integrated energy system,IES)规模小,能量耦合复杂的特点,建立一种考虑能量特性差异的混合时间尺度经济调度模型。首先,在日前尺度中,对电、冷、热能以相同的时间分辨率进行协调优化,同时为了应对各类预测误差,基于机会约束规划模型设置一定置信度的电、气备用;其次,针对冷热能的慢动态特性,采用电-冷/热解耦的日内混合时间尺度修正方法,根据日前出力,在上层以低时间分辨率优化冷、热能相关设备出力,在下层以高时间分辨率,结合上层时间分辨率的修正结果来调整储电装置和联络线调度计划;最后,提出了几种备用场景和混合时间尺度分辨率的动态选择方法,并分别对日前备用计划和冷热能潜在影响下的时间尺度灵活性作以定量分析,说明混合时间尺度和日前备用对用户级IES调度的意义。展开更多
文摘综合能源系统(integrated energy system, IES)是未来能源消费方式的重要发展方向,对提升能源的综合用能能效和可再生能源的消纳将发挥越来越重要的作用。然而,由于IES中能源系统的高度耦合以及源-网-荷-储各个环节存在的不确定性,使得IES的动态过程极其复杂,给IES的优化运行带来巨大挑战。针对IES的优化运行问题,首先简要介绍了IES的概念,分析了其主要特点;其次总结和概括了IES运行基础信息感知、混合时间尺度动态协调优化调度体系及其求解算法三个方面的国内外研究现状,并指出了现有研究的不足之处;最后展望了IES优化运行未来的研究方向,为该方向的后续研究提供参考。
基金supported by the National High Technology Research and Development Program(863 Program)of China(No.2015AA050403)
文摘This paper proposes an economic optimization method with two time scales for a hybrid energy system based on the virtual storage characteristic of a thermostatically controlled load(TCL). The optimization process includes two time scales in order to ensure accuracy and efficiency. Based on the forecast load and energy supply of the system, the first time scale is day-ahead economic operating optimization, carried out to determine the minimum operating cost for the whole day, and to find the period of greatest cost to which the second time scale optimization is applied. Using the virtual storage characteristic, the second time scale is short-term detailed optimization carried out for these particular hours. By dispatching thermal load in this period and adjusting energy supply accordingly, we can find the optimal economic performance, and customer requests are taken into account to ensure satisfaction. A case study in Tianjin, China illustrates the effectiveness of this method and proves that a TCL can make a great contribution to improving the economic performance of a hybrid energy system.
文摘针对用户级综合能源系统(integrated energy system,IES)规模小,能量耦合复杂的特点,建立一种考虑能量特性差异的混合时间尺度经济调度模型。首先,在日前尺度中,对电、冷、热能以相同的时间分辨率进行协调优化,同时为了应对各类预测误差,基于机会约束规划模型设置一定置信度的电、气备用;其次,针对冷热能的慢动态特性,采用电-冷/热解耦的日内混合时间尺度修正方法,根据日前出力,在上层以低时间分辨率优化冷、热能相关设备出力,在下层以高时间分辨率,结合上层时间分辨率的修正结果来调整储电装置和联络线调度计划;最后,提出了几种备用场景和混合时间尺度分辨率的动态选择方法,并分别对日前备用计划和冷热能潜在影响下的时间尺度灵活性作以定量分析,说明混合时间尺度和日前备用对用户级IES调度的意义。
