Integrated Electrical and Gas Network Flexibility Assessment in Low-Carbon Multi-Energy Systems
Integrated Electrical and Gas Network Flexibility Assessment in Low-Carbon Multi-Energy Systems
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DOI：
10.1109/tste.2015.2497329
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发表时间：
2016-04-01
影响因子：
8.8
通讯作者：
Mancarella, Pierluigi
中科院分区：
文献类型：
--
作者：
Clegg, Stephen;Mancarella, Pierluigi
在可再生能源越来越多的电力系统中，燃气发电在提供短期灵活性以满足净负荷要求方面发挥着日益突出的作用。燃气轮机提供的灵活性又依赖于燃气网络的灵活性。虽然关于天然气管网在提供这种操作灵活性方面的能力有几次讨论，但这还没有明确的建模或量化。此外，燃气网络还可能负责提供供暖技术，而低碳情景下电力、供暖和燃气部门之间的互动更加紧密，这需要对多能源系统进行全面评估。在这些前提下，本文提出了一种新颖的方法来量化燃气网络可以为电力系统提供的灵活性，以及它可能对电力系统施加的约束，并考虑了不同的供热场景。这是通过一种新颖的多级集成燃气和电力传输网络模型实现的，该模型使用电气DC OPF以及稳态和暂态气体分析。引入了一种新的指标，该指标利用带状线路包的概念来评估综合气电灵活性，并将其用于对电气最优潮流施加与气体相关的跨网跨期约束。对英国输电系统的不同可再生能源和供热方案进行了案例研究，以演示建议的综合灵活性评估方法，深入了解供暖部门的变化对多能源系统组合灵活性要求和能力的影响，并评估电网如何经历与燃气网络缺乏灵活性相关的本地发电和备用限制。
In power systems with more and more variable renewable sources, gas generation is playing an increasingly prominent role in providing short-term flexibility to meet net-load requirements. The flexibility provided by the gas turbines in turn relies on the flexibility of the gas network. While there are several discussions on the ability of the gas network in providing this operational flexibility, this has not been clearly modeled or quantified. In addition, the gas network may also be responsible for supplying heating technologies, and low-carbon scenarios see a tighter interaction between the electricity, heating and gas sectors, which calls for a holistic multi-energy system assessment. On these premises, this paper presents an original methodology to quantify the flexibility the gas network can provide to the power system, as well as the constraints it may impose on it, with also consideration of different heating scenarios. This is achieved by a novel multi-stage integrated gas and electrical transmission network model, which uses electrical DC OPF and both steady-state and transient gas analyses. A novel metric that makes use of the concept of zonal linepack is also introduced to assess the integrated gas and electrical flexibility, which is then used to impose gas-related inter-network inter-temporal constraints on the electrical OPF. Case studies are performed for the Great Britain transmission system for different renewables and heating scenarios to demonstrate the proposed integrated flexibility assessment methodology, provide insights into the effects of changes to the heating sector on the multi-energy system's combined flexibility requirements and capability, and assess how the electrical network can experience local generation and reserve constraints related to the gas network's lack of flexibility.