摘要
考虑到一定长度范围的管道内,热源供热温度、热负荷回水温度变化很小,基于供热温度和热负荷回水温度不变的合理假设,通过推导,将热源与热负荷之间的多根管道抽象成一根,等效成热源直接向热负荷供热,建立起热源与热负荷管道流量的一元函数关系。该文对长距离管道和短距离管道分别构建2种模型,该模型将供水网络与回水网络解耦,将流量与温度解耦。确定热源出力后,可通过热电联产机组确定电出力,进而得到电网潮流解。模型简单,计算量小,且不存在收敛性问题,误差分析表明该模型求解精度较高。算例测试验证了所提模型的有效性与合理性。
Considering a certain length of the pipeline,the heat supply temperature and the heat load return water temperature change slightly.Based on this,multiple pipelines between heat sources and heat demands are equivalent into one pipeline.As a result,the heat source production is directly related to heat demands and pipeline mass flows.Moreover,two models were established for long-distance and short-distance pipes respectively.The model decouples the water supply network from the backwater network and decouples the mass flows from the temperature.After the heat source production was determined,the power generation from combined heat and power units can be determined.Subsequently,the power flow solution can be obtained.The proposed model is simple,computationally efficiently and numerically stable.The error analysis shows that the model has higher accuracy.Numerical results verify the validity and effectiveness of the proposed model.
作者
孙国强
王文学
吴奕
胡伟
荆江平
卫志农
臧海祥
SUN Guoqiang;WANG Wenxue;WU Yi;HU Wei;JING Jiangping;WEI Zhinong;ZANG Haixiang(College of Energy and Electrical Engineering,Hohai University,Nanjing 211100,Jiangsu Province,China;State Grid Jiangsu Power Company,Nanjing 210024,Jiangsu Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2020年第13期4131-4141,共11页
Proceedings of the CSEE
基金
国家自然科学基金项目(51877071)
江苏省自然科学基金项目(BK20171433)
国网江苏省电力有限公司科技项目(J2019024)。
关键词
综合能源系统
电-热互联
辐射状热网模型
能量流计算
热网解耦
integrated energy system
electric-thermal interconnected
radial heating network model
energy flow calculation
heat network decoupling
