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Redispatching in an interconnected electricity system with high renewables penetration

机译：在具有高可再生能源渗透率的互连电力系统中重新调度

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摘要

Grid congestion management is gaining importance in certain parts of the European electricity grid. The deployment of renewable electricity sources at locations with a weak grid connection and far from the load centers can lead to overloading of transmission lines. Redispatching, i.e., rearranging scheduled generation and consumption, might be needed to obtain a feasible and safe operational state of the electricity system. This paper studies the impact of three parameters on the redispatching quantities and costs: (1) loop flows through the electricity system, (2) an increase in renewable generation in remote areas, and (3) a curative and preventive N-1 security criterion. Towards this aim, a dedicated generation scheduling model is developed, consisting of a day-ahead market and a redispatch phase. The Belgian power system is considered as case study. Three general conclusions can be drawn from this paper. First, it is important to consider loop flows when quantifying redispatching, especially in a highly interconnected electricity system as the European system. The case study shows that loop flows can more than double the need for redispatching. Second, transmission grid constraints might restrict the deployment of renewables in certain areas. Third, relaxing the N-1 security criterion in congested grid areas from preventive to curative can drastically reduce the redispatch costs. (C) 2015 Elsevier B.V. All rights reserved.
机译：电网拥塞管理在欧洲电网的某些地区变得越来越重要。在电网连接较弱且远离负载中心的位置部署可再生电源会导致输电线路过载。为了获得电力系统的可行和安全的运行状态，可能需要重新调度，即重新安排计划的发电和消耗。本文研究了三个参数对重新分配数量和成本的影响：（1）循环流经电力系统；（2）偏远地区可再生能源发电量的增加；（3）治愈性和预防性的N-1安全标准。为了实现这一目标，开发了专用的发电调度模型，该模型包括日前市场和重新调度阶段。比利时的电力系统被视为案例研究。从本文可以得出三个一般性结论。首先，在量化重新分配时，尤其是在高度互连的电力系统（如欧洲系统）中，考虑环路流量非常重要。案例研究表明，循环流可以使重新分配的需求增加一倍以上。其次，输电网的限制可能会限制可再生能源在某些地区的部署。第三，将拥挤的电网区域中的N-1安全标准从预防性改为治疗性可以大大降低重新分配的成本。 （C）2015 Elsevier B.V.保留所有权利。

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