含冷热电三联供的微能源网能量流计算及综合仿真
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摘要
首先给出了微能源网的定义,然后基于能源集线器的概念,建立了冷热电三联供(CCHP)系统的能量流模型;并将其作为配电网与天然气网的耦合节点,推导了适用于天然气网能量流计算的有限元节点法,提出了一种电—气耦合微能源网的能量流计算方法。提出了CCHP供能率的指标。以openDSS和MATLAB为平台,对含CCHP的微能源网进行综合仿真,分别计算了以电定热和以热定电两种典型运行方式下夏季典型日的逐时能量流。计算结果表明,所提出的能量流计算和综合仿真方法可用于分析微能源网的能量流,CCHP供能率指标可以反映微能源网电—气能源的耦合程度。
Firstly,the concept of micro-energy grid is introduced,and the energy flow model of combined cooling,heating and power(CCHP)system is proposed based on the concept of energy hub.The CCHP will act the role of the coupled nodes between distributed network and natural gas network.Then the finite element node method for the calculation of natural gas network energy flow is deducted.Besides,based on the software of openDSS and MATLAB,a novel method and integrated simulation platform of electricity and gas coupled energy internet is proposed.In order to assess the coupled degree of the distributed network and natural gas network,a novel index named CCHP energy supply rate is introduced.Case studies are taken with two typical operation models on a typical summer day:following the thermal load and following the electric load.Simulation results show that the method and integrated simulation platform are available and the CCHP energy supply rate index can be used to assess the coupled degree of electric-gas energy for micro-energy grid.
Firstly,the concept of micro-energy grid is introduced,and the energy flow model of combined cooling,heating and power(CCHP)system is proposed based on the concept of energy hub.The CCHP will act the role of the coupled nodes between distributed network and natural gas network.Then the finite element node method for the calculation of natural gas network energy flow is deducted.Besides,based on the software of openDSS and MATLAB,a novel method and integrated simulation platform of electricity and gas coupled energy internet is proposed.In order to assess the coupled degree of the distributed network and natural gas network,a novel index named CCHP energy supply rate is introduced.Case studies are taken with two typical operation models on a typical summer day:following the thermal load and following the electric load.Simulation results show that the method and integrated simulation platform are available and the CCHP energy supply rate index can be used to assess the coupled degree of electric-gas energy for micro-energy grid.
引文
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[2]RIFKIN J.The third industrial revolution[J].Engineering&Technology,2008,3(7):26-27.
[3]王毅,张宁,康重庆.能源互联网中能量枢纽的优化规划与运行研究综述及展望[J].中国电机工程学报,2015,35(22):5669-5681.WANG Yi,ZHANG Ning,KANG Chongqing.Review and prospect of optimal planning and operation of energy hub in energy internet[J].Proceedings of the CSEE,2015,35(22):5669-5681.
[4]AN S,LI Q,GEDRA T W.Natural gas and electricity optimal power flow[C]//IEEE PES Transmission and Distribution Conference and Exposition,September 7-12,2003,Dallas,Texas,USA:138-143.
[5]MARTINEZ-MARES A,FUERTE-ESQUIVEL C R.Integrated energy flow analysis in natural gas and electricity coupled systems[C]//North American Power Symposium,August 4-6,2011,Boston,MA,USA:7p.
[6]MARTINEZ-MARES A,FUERTE-ESQUIVEL C R.A unified gas and power flow analysis in natural gas and electricity coupled networks[J].IEEE Trans on Power Systems,2012,27(4):2156-2166.
[7]GEIDL M,ANDERSSON G.Optimal power flow of multiple energy carriers[J].IEEE Trans on Power Systems,2007,22(1):145-155.
[8]LIU X,JENKINS N,WU J,et al.Combined analysis of electricity and heat networks[J].Energy Procedia,2014,61:155-159.
[9]UNSIHUAY C,LIMA J W M,DE SOUZA A C Z.Modeling the integrated natural gas and electricity optimal power flow[C]//IEEE Power Engineering Society General Meeting,June24-28,2007,Tampa,FL,USA:7p.
[10]陈胜,卫志农,孙国强,等.电-气混联综合能源系统概率能量流分析[J].中国电机工程学报,2015,35(24):6331-6339.CHEN Sheng,WEI Zhinong,SUN Guoqiang,et al.Probabilistic energy flow analysis in integrated electricity and natural-gas energy systems[J].Proceedings of the CSEE,2015,35(24):6331-6339.
[11]孙国强,陈霜,卫志农,等.计及相关性的电-气互联系统概率最优潮流[J].电力系统自动化,2015,39(21):11-17.DOI:10.7500/AEPS20150611006.SUN Guoqiang,CHEN Shuang,WEI Zhinong,et al.Probabilistic optimal power flow of combined natural gas and electric system considering correlation[J].Automation of Electric Power Systems,2015,39(21):11-17.DOI:10.7500/AEPS20150611006.
[12]徐宪东,贾宏杰,靳小龙,等.区域综合能源系统电/气/热混合潮流算法研究[J].中国电机工程学报,2015,35(14):3634-3642.XU Xiandong,JIA Hongjie,JIN Xiaolong,et al.Study on hybrid heat-gas-power flow algorithm for integrated community energy system[J].Proceedings of the CSEE,2015,35(14):3634-3642.
[13]GEIDL M,KOEPPEL G,FAVRE-PERROD P,et al.Energy hubs for the future[J].IEEE Power and Energy Magazine,2007,5(1):24-30.
[14]杜以臣.以水力计算为基础的城市燃气管网可靠性评价[D].哈尔滨:哈尔滨工业大学,2009.
[15]张文慧.燃气管网水力计算的数学建模与算法设计[D].大连:大连理工大学,2005.
[16]OSIADACZ A J.Simulation and analysis of gas network[M].Houston,USA:Gulf Publishing Company,1987.
[17]张义斌.天然气-电力混合系统分析方法研究[D].北京:中国电力科学研究院,2005.
[18]覃健.微网冷热电联供系统经济性优化研究[D].北京:华北电力大学,2014.
[19]DUGAN R C.Reference guide:the open distribution system simulator(openDSS)[R].2009.
[20]KERSTING W H.Radial distribution test feeders[J].IEEETrans on Power Systems,1991,6(3):975-985.