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热网特性对于综合能源系统超短期调度的影响
作者:
作者单位:

1. 东南大学电气工程学院, 江苏省南京市 210096; 2. 国网浙江省电力公司电力科学研究院, 浙江省杭州市 310014

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基金项目:

国家自然科学基金资助项目(51477029);国家科技支撑计划资助项目(2015BAA01B01)


Effect of Heating Network Characteristics on Ultra-short-term Scheduling of Integrated Energy System
Author:
Affiliation:

1. School of Electrical Engineering, Southeast University, Nanjing 210096, China; 2. State Grid Zhejiang Electric Power Research Institute, Hangzhou 310014, China

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    摘要:

    综合能源系统中的热网和电网在传输时延和传输损耗等方面存在显著差异。文中着重研究热网特性对于系统超短期调度的影响,首先基于图论建立适用于系统优化调度的热网模型,重点研究热媒温度的暂态变化特性,推导出依据调度周期和管段长度判断管段暂/稳传热特性的公式。随后分别对比三种情景下(考虑热网暂态传热特性、仅考虑热网稳态传热特性和不考虑热网传热特性)设备的最优运行状态、日运行成本和模型求解时间。研究结果表明,热网复杂的拓扑结构和传输时延造成的蓄热特性改变了系统热功率的供求匹配机理,使得热源端和负荷端的供、求热功率不再实时匹配。考虑热网暂态传热特性前后,燃气锅炉的最优出力和热网的供水温度变化显著,可见在系统超短期调度环节应考虑热网暂态传热特性。

    Abstract:

    There are significant differences in transmission delay and transmission loss between the heating network and the grid in the integrated energy system. This paper focuses on the effect of the heating network characteristics on the ultra-short-term scheduling of the system. Firstly, a heating network model for operational optimization of the system is established based on graph theory, in which the transient characteristics of heat medium temperature are studied emphatically. The formula for judging the transient/steady heat transfer characteristics of a pipeline is also derived according to the period of operation and the length of the pipeline. Then, the optimal operation state of the devices, the daily operation cost and the solution time of each model are compared among three situations(considering transient heat transfer characteristics, considering steady heat transfer characteristics only and ignoring the heat transfer characteristics of the heating network). Research result shows that the heat storage characteristics caused by the complex topology and transmission delay of the heating network have changed the matching mechanism between the supply and demand of the system thermal power. The supply thermal power at the heat source end and the demand thermal power at the load end are no longer matched in real time. Before and after considering the transient heat transfer characteristics of the heating network, the optimal output of the gas boiler changes significantly, the temperatures of supply water also vary greatly, all of which show that the transient heat transfer characteristics of the heating network should be considered in the ultra-short-term scheduling of the integrated energy system.

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姚帅,顾伟,张雪松,等.热网特性对于综合能源系统超短期调度的影响[J].电力系统自动化,2018,42(14):83-90. DOI:10.7500/AEPS20170914007.
YAO Shuai, GU Wei, ZHANG Xuesong,et al.Effect of Heating Network Characteristics on Ultra-short-term Scheduling of Integrated Energy System[J].Automation of Electric Power Systems,2018,42(14):83-90. DOI:10.7500/AEPS20170914007.

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历史
  • 收稿日期:2017-09-14
  • 最后修改日期:2018-05-29
  • 录用日期:2018-01-01
  • 在线发布日期: 2018-05-28
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