| 引用本文: | 王舒萍,张沈习,程浩忠,原凯,宋毅,韩丰.考虑天然气系统初值优化的综合能源系统改进多能流计算方法[J].电力自动化设备,2022,42(1): |
| WANG Shuping,ZHANG Shenxi,CHENG Haozhong,YUAN Kai,SONG Yi,HAN Feng.Improved multi-energy flow calculation method for integrated energy system considering initial value optimization of natural gas system[J].Electric Power Automation Equipment,2022,42(1): |
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| 摘要: |
| 多能流计算是综合能源系统规划和运行等工作的重要基础，目前基于牛顿-拉夫逊法的多能流求解算法对初值依赖性较强，且天然气系统的初值给定缺少有效方法。首先，在天然气系统稳态能流模型基础上，基于分段线性化方法构建了天然气管道流量方程的线性化模型；在此基础上，建立了天然气系统初值优化模型以获得优良的初值，模型中采用线性化后的管道流量方程以简化模型复杂度；最后，结合传统的牛顿-拉夫逊法，提出了考虑天然气系统初值优化的综合能源系统改进多能流计算方法及计算流程。在2个规模不同的综合能源系统上进行算例测试，仿真结果验证了所提方法能有效改善算法的收敛性和收敛速度，对于规模较大的系统效果更为显著。 |
| 关键词: 综合能源系统 改进多能流计算 天然气系统 初值优化 分段线性化 |
| DOI：10.16081/j.epae.202109022 |
| 分类号:TM744;TK01 |
| 基金项目:国家自然科学基金委员会-国家电网公司智能电网联合基金重点项目(U1966206)；国家电网有限公司科技项目(SGTJJY00GHJS1900040) |
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| Improved multi-energy flow calculation method for integrated energy system considering initial value optimization of natural gas system |
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WANG Shuping1, ZHANG Shenxi1, CHENG Haozhong1, YUAN Kai2, SONG Yi2, HAN Feng2
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1.Key Laboratory of Control of Power Transmission and Conversion, Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China;2.State Grid Economic and Technological Research Institute Co.,Ltd.,Beijing 102209, China
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| Abstract: |
| Multi-energy flow calculation is an important foundation for the planning, operation and other work of integrated energy system. The algorithm for solving multi-energy flow based on Newton-Raphson method is quite sensitive to initial value, and there is a lack of effective method to determine the initial value of natural gas system. Firstly, based on the steady state energy flow model of natural gas system, the linearization model of flow equation of natural gas pipeline is established based on piecewise linearization method. On this basis, the initial value optimization model of natural gas system is established to obtain excellent initial value, and the linearized pipeline flow equation is used to simplify the complexity of the model. Finally, combined with the traditional Newton-Raphson method, the improved multi-energy flow calculation method and calculation process for integrated energy system considering initial value optimization of natural gas system are proposed. Case studies are implemented on two integrated energy systems with different scales. The simulative results show that the proposed method can effectively improve the convergence and convergence rate of the algorithm, especially for large scale systems. |
| Key words: integrated energy system improved multi-energy flow calculation natural gas system initial value optimization piecewise linearization |
