Operating Reserve Dimensioning Methodologies for Renewable Energy Aligned Power Systems

Leigh Bongers, Ndamulelo Mararakanye, B. Bekker
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引用次数: 2

Abstract

Over the last decade there has been a significant transformation in the electricity generation sector across the world, with the aim of reducing the environmental impact of electricity generation. Variable renewable energy (VRE) sources such as wind and solar photovoltaic have proven to be particularly popular in mitigating these environmental impacts. Increasing the penetration of VRE in the electricity generation mix will increase generation variability and uncertainty and can potentially introduce various technical challenges regarding the reliability of the power system network. Generation and demand must be in balance at all times for network reliability and operating reserves exist on the network to ensure system reliability during periods of imbalance. The risk exists that current "traditional" operating reserve dimensioning methodologies do not efficiently account for the increase in system imbalance variability and uncertainty as a result of increased VRE generation. This paper reviews the challenges associated with high VRE penetration networks and the caveats of current, "traditional" reserve dimensioning methodologies. Emerging, state-of-the-art methodologies in literature and in practice are reviewed to form a basis for future considerations in development of reserve dimensioning methodologies. The paper finds that transmission system operators (TSOs) of modern power systems with high VRE penetration in general are increasingly using probabilistic methodologies to dynamically dimension reserve requirements economically while reliably ensuring system adequacy.
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可再生能源并网电力系统运行储备量纲方法
在过去的十年里,世界各地的发电行业发生了重大转变,目的是减少发电对环境的影响。风能和太阳能光伏等可变可再生能源已被证明在减轻这些环境影响方面特别受欢迎。增加VRE在发电组合中的渗透将增加发电的可变性和不确定性,并可能带来有关电力系统网络可靠性的各种技术挑战。由于电网的可靠性,发电和需求必须在任何时候都处于平衡状态,而电网中存在运行储备,以保证不平衡时期系统的可靠性。目前存在的风险是,“传统的”运行储备量纲方法不能有效地解释由于VRE产生增加而导致的系统不平衡变异性和不确定性的增加。本文回顾了与高VRE渗透网络相关的挑战以及当前“传统”储备维度方法的警告。对文献和实践中出现的最先进的方法进行了审查,以形成未来考虑制定储备规模方法的基础。本文发现,在高VRE渗透率的现代电力系统中,输电系统运营商(tso)普遍越来越多地使用概率方法在可靠地保证系统充分性的同时,经济地动态地确定备用需求。
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