| 引用本文: | 陈厚合,尚聪,王丹,李思源,姜涛.计及输气系统延时特性的电-气互联系统可用输电能力计算[J].电力自动化设备,2019,39(8): |
| CHEN Houhe,SHANG Cong,WAGN Dan,LI Siyuan,JIANG Tao.Available transfer capability calculation of integrated electricity and natural-gas systems considering delay characteristics of gas transmission system[J].Electric Power Automation Equipment,2019,39(8): |
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| 摘要: |
| 电-气互联系统中燃气轮机发电比重以及天然气网络规模不断增大，而传统电力系统可用输电能力(ATC)计算方法未考虑天然气系统的传输延时特性，为此，研究计及输气系统延时特性的电-气互联系统ATC计算。采用等间隔采样法表示延时的动态变化过程，计算不同时刻采样点天然气网节点压力以及燃气轮机进气量的边界值，将燃气轮机进气量转换为发电出力上限，求解出变化过程中不同时刻的稳态ATC值。为提高计算效率，采用基于二分法原理的自适应步长法(ASBM)对ATC进行求解，以运行点与安全域边界的距离为依据，确定下一个预测运行点的位置。算例分析表明天然气系统的延时特性可以提高系统ATC值，且验证了采用ASBM求解ATC的高效性。 |
| 关键词: 可用输电能力 能源互联网 能源互联 天然气网延时特性 二分法 自适应步长 |
| DOI：10.16081/j.epae.201908043 |
| 分类号:TM711 |
| 基金项目:国家自然科学基金资助项目(51677022,51877033)；国家重点研发计划资助项目(2017YFB0903400)；吉林省综合能源系统创新团队资助项目(20180519015JH) |
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| Available transfer capability calculation of integrated electricity and natural-gas systems considering delay characteristics of gas transmission system |
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CHEN Houhe1, SHANG Cong1, WAGN Dan2, LI Siyuan2, JIANG Tao1
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1.School of Electrical Engineering, Northeast Electric Power University, Jilin 132012, China;2.Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China
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| Abstract: |
| The power generation proportion of gas turbine and the scale of natural gas network are increa-sing in the integrated electricity and natural-gas systems, while the traditional ATC(Available Transfer Capability) calculation method of power system doesn’t consider the transmission delay characteristics of natural gas system, so ATC calculation of integrated electricity and natural-gas systems considering the delay characteristics is researched. The equal interval sampling method is adopted to represent the dynamic process of delay, the boundary value of node pressure of natural gas network and intake gas of gas turbine at different sampling points are calculated, and the intake gas of gas turbine is converted into the upper limit of power generation output, and the steady-state ATC values at different time during the change process are calculated. In order to improve the calculation efficiency, ASBM(Adaptive Step Bisection Method) is used to solve the ATC, and the next predicted operation point is determined according to the distance between the operation point and the security domain boundary. Case analysis shows that the delay characteristics of natural gas system can improve the ATC value, and verifies the efficiency of ASBM in solving ATC. |
| Key words: ATC energy internet energy interconnection delay characteristics of natural gas network dichotomy adaptive step |
