为解决天然气输送过程中压力能的浪费问题,提高天然气能源利用率,提出将天然气压力能发电系统引入至微电网整体调度方案中。针对天然气压力能发电系统中前后端口的补热需要,将微电网中的风冷热泵补热系统与压力能发电系统进行耦合。考虑到由天然气管网中流量波动和环境因素造成的压力能出力波动问题,提出微电网储荷一体化协调优化方案,以确保系统高效稳定运行。基于上述内容,构建考虑可控电源出力成本、储能调度成本、微电网与配电网的交互成本和负荷调度成本的微电网优化调度模型,并采用Yalmip工具包编写优化调度程序。最后,通过对西南地区某调压站数据进行仿真,验证该方案的可行性与经济性。
Abstract
In order to solve the pressure energy waste problem in the natural gas transmission process and improve the utilization rate of natural gas energy, this paper proposes to introduce the natural gas pressure energy power generation system into the overall dispatching scheme of the microgrid. Aiming at the heat supplement needs of the front and rear ports in the natural gas pressure energy power generation system, the air-cooled heat pump supplementary heating system in the microgrid is coupled with the pressure energy power generation system. Taking into account the pressure energy output fluctuations caused by flow fluctuations in the natural gas pipeline network and environmental factors, a micro-grid integrated load storage coordination optimization scheme was proposed to ensure efficient and stable operation of the system. Based on the above content, a microgrid optimization dispatching model considering the controllable power output cost, energy storage dispatching cost, interaction cost between microgrid and distribution network and load dispatching cost is constructed, and Yalmip toolkit is used to write the optimal dispatching program. Finally, by simulating the data of a voltage regulating station in the southwestern region, the economy and reliability of the scheme in this paper are verified.
关键词
微电网 /
优化 /
电力系统 /
天然气压力能 /
协调调度
Key words
microgrids /
optimization /
electric power system /
natural gas pressure energy /
coordinated scheduling
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参考文献
[1] 张安安, 冯雅婷, 林冬, 等. 考虑天然气压力能综合利用的微能网气-电需求响应模型[J]. 电力系统自动化, 2020, 44(8): 19-33.
ZHANG A A, FENG Y T, LIN D, et al.Gas-electricity demand response model for micro-energy grid considering comprehensive utilization of natural gas pressure energy[J]. Automation of electric power systems, 2020, 44(8): 19-33.
[2] 陈杨. 天然气余压发电的理论分析与计算[J]. 燃气轮机技术, 2013, 26(3): 65-68.
CHEN Y.Theory analysis and calculation of natural gas pressure recovery electricity[J]. Gas turbine technology, 2013, 26(3): 65-68.
[3] 徐文东, 刘一成, 蔡振培, 等. 天然气管网压力能发电技术现状及未来发展方向[J]. 现代化工, 2019, 39(12): 11-15, 20.
XU W D, LIU Y C, CAI Z P, et al.Research progress and expectation on power generation technology by using pressure energy of natural gas pipeline network[J]. Modern chemical industry, 2019, 39(12): 11-15, 20.
[4] ANNA D, YULI W, YI G, et al.Development and application of screw expander in natural gas pressure energy recovery at city gas station[J]. Applied thermal engineering, 2018, 142: 665-673.
[5] 符仁义. S集团天然气压力能发电项目后评估研究[D]. 广州: 华南理工大学, 2018.
FU R Y.Study on post evaluation of S group natural gas pressure energy generation project[D]. Guangzhou: South China University of Technology, 2018.
[6] FARZANEH-GORD M, GHEZELBASH R, SADI M, et al.Integration of vertical ground-coupled heat pump into a conventional natural gas pressure drop station: energy, economic and CO2 emission assessment[J]. Energy, 2016, 112: 998-1014.
[7] HOWARD C, OOSTHUIZEN P, PEPPLEY B.An investigation of the performance of a hybrid turboexpander-fuel cell system for power recovery at natural gas pressure reduction stations[J]. Applied thermal engineering, 2011, 31(13): 2165-2170.
[8] 陶继升. 微电网群两阶段源储荷协调优化方法研究[D]. 合肥: 安徽大学, 2019.
TAO J S.Research on two-stage coordination and optimization method of source storage and load for microgrid group[D]. Hefei: Anhui University, 2019.
[9] LI J, XUE Y, TIAN L, et al.Research on optimal configuration strategy of energy storage capacity in grid-connected microgrid[J]. Protection and control of modern power systems, 2017, 2(1): 35.
[10] 杨茂, 王金鑫. 考虑可再生能源出力不确定的孤岛型微电网优化调度[J]. 中国电机工程学报, 2021, 41(3):973-984.
YANG M, WANG J X.Optimal Scheduling of Islanded microgrid Considering Uncertain Output of Renewable Energy[J]. Proceedings of the CSEE, 2021, 41(3):973-984.
[11] YAO S, ZHANG Y, DENG N, et al.Performance research on a power generation system using twin-screw expanders for energy recovery at natural gas pressure reduction stations under off-design conditions[J]. Applied energy, 2019, 236(Feb.15): 1218-1230.
[12] 刘银松. 高膨胀比、大焓降气体轴承透平膨胀机的设计[J]. 深冷技术, 2011(6): 15-17.
LIU Y S.Design of gas bearing turbine expander of high expansion ratio and big enthalpy drop[J]. Cryogenic technology, 2011(6): 15-17.
[13] 钟金鸣. 天然气压力能单机双级膨胀发电及热泵分级补热制冰技术应用探讨分析[J]. 华东科技(综合), 2019(3): 21-22.
ZHONG J M.Discussion and analysis of the application of natural gas pressure energy single-unit two-stage expansion power generation and heat pump stage heating and ice making[J]. East China science & technology, 2019(3): 21-22.
[14] 彭雷. 天然气高压管网余压发电项目可行性分析[J]. 城市公用事业, 2010, 24(3): 35-38, 51.
PENG L.Analysis of feasibility of power generation by using residual pressure in high pressure natural gas pipeline network[J]. Public utilities, 2010, 24(3): 35-38, 51.
[15] 刘一欣, 郭力, 王成山. 微电网两阶段鲁棒优化经济调度方法[J]. 中国电机工程学报, 2018, 38(14): 4013-4022, 4307.
LIU Y X, GUO L, WANG C S.Economic dispatch of microgrid based on two stage robust optimization[J]. Proceedings of the CSEE, 2018, 38(14): 4013-4022, 4307.
[16] 刘思夷, 赵波, 汪湘晋, 等. 基于Benders分解的独立型微电网鲁棒优化容量配置模型[J]. 电力系统自动化, 2017, 41(21): 119-126, 146.
LIU S Y, ZHAO B, WANG X J, et al.Capacity configuration model for robust optimization of stand-alone microgrid based on benders decomposition[J]. Automation of electric power systems, 2017, 41(21): 119-126, 146.
[17] 魏明奎, 周全, 周泓, 等. 基于两阶段鲁棒优化的西南地区微电网经济调度[J]. 中国电力, 2019, 52(11): 2-8, 18.
WEI M K, ZHOU Q, ZHOU H, et al.Economic dispatch of microgrid in southwest china based on two-stage robust optimization[J]. Electric power, 2019, 52(11): 2-8, 18.
[18] 符杨, 蒋一鎏, 李振坤, 等. 计及可平移负荷的微网经济优化调度[J]. 中国电机工程学报, 2014, 34(16): 2612-2620.
FU Y, JIANG Y L, LI Z K, et al.Optimal economic dispatch for microgrid considering shiftable loads[J]. Proceedings of the CSEE, 2014, 34(16): 2612-2620.
基金
四川省科技计划（2020YFQ0038; 2020YFSY0037）; 中央引导地方科技发展专项（2021ZYD0042）
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