Network constraints in techno-economic energy system models: towards more accurate modeling of power flows in long-term energy system models
Network constraints in techno-economic energy system models: towards more accurate modeling of power flows in long-term energy system models
复制标题
技术经济能源系统模型中的网络约束：对长期能源系统模型中的电力流进行更准确的建模
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
W. Fichtner
中科院分区：
文献类型：
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作者：
C. Nolden;M. Schönfelder;Anke Eßer;V. Bertsch;W. Fichtner
由于可再生能源在电力供应中的份额将在未来几十年内大幅增加，电力系统将经历广泛的结构性变化。这需要大量电力的运输，例如从北海到大型负荷中心。此外，分散的发电装置(如光伏)需要在不违反网络安全约束的情况下集成到较低电压的电网中。因此，系统中的电网负荷将上升到现有电网容量难以管理的程度。因此，虽然迄今为止大多被忽视，但在能源系统模型中考虑电网的重要性显著增加。在本文中，将给出不同的例子，如何在技术经济能源系统模型中考虑网络约束，重点是容量扩展规划和长期时间范围。首先，建立了由发电和输电系统方程组成的多周期线性优化模型。利用直流潮流模型对后者进行了分析。其次，将描述如何使用交流潮流建模工具对中低压电网进行详细的表示。最后，我们将给出一个新的网格建模数学方法在技术经济能源系统模型中的应用实例。
Power systems are subject to extensive structural changes as a result of the fact that the share of renewable energies in power supply will increase significantly within the next decades. This requires the transport of large amounts of electricity, e.g. from the North Sea to the large load centres. Moreover, the decentralized installations for the generation of electricity (e.g. PV) need to be integrated in the lower voltage power grids without violating net-safety constraints. As a consequence, the grid load in the system will rise to an extent that is hardly manageable with existing power grid capacities. Therefore, while mostly neglected to date, the importance of considering the power grid in energy system models increases significantly. Within this paper, different examples will be given how network constraints can be considered in techno-economic energy system models with a focus on capacity expansion planning and a long-term time horizon. Firstly, a multi-period linear optimization model will be presented, which comprises the system equations for power generation and transmission. The latter is analyzed with the help of a DC power flow model. Secondly, the usage of an AC power flow modeling tool for a detailed representation of the medium and low voltage power grid will be described. Finally, we will present an illustrative example application of a new mathematical approach for grid modeling in techno-economic energy system models.