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首页> 外文期刊>Electric power systems research >Influencing the bulk power system reserve by dispatching power distribution networks using local energy storage
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Influencing the bulk power system reserve by dispatching power distribution networks using local energy storage

机译：通过使用本地储能调度配电网络来影响大功率电力系统的储备

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Multiple research works and power systems operational practices have qualitatively associated the progressive connection of stochastic renewable energy resources with the increase of power systems reserve requirements. At the same time, the price and technology of MW-class Battery Energy Storage Systems (BESSs) have considerably improved, which opens up the possibility to make electric distribution networks dispatchable. In this paper, we investigate the impact on the bulk power system of dispatchable electric distribution networks that host a large share of stochastic resources. The essential questions inspiring this research are: (1) Assuming that BESSs are deployed to achieve dispatchability of distribution grids embedding stochastic resources, what is the impact on the bulk power system reserve requirement? (2) Is this large-scale integration of BESSs economically viable compared to centralized reserve procurement from traditional power plants? To address these questions, we consider the case of the Danish transmission grid and the associated fleet of conventional power plants and compare it against locally dispatched distribution grids. We perform stochastic simulations to quantify and validate the amount of reserve necessary to operate these power systems with a desired reliability level. We establish a numerical equivalence between saved conventional reserve capacity and amount of BESS storage deployed in distribution networks. Then, we quantify the economic pay-back times of BESSs capital expenditure (CAPEX). The results show that: (1) large scale deployment of BESSs with dispatchable distribution networks is a viable technical solution to address flexibility requirements for the bulk power system and (2) this solution is economically viable with a pay-back time in the range of 11–14 years compared to providing flexibilities from conventional power plants.
机译：多项研究工作和电力系统运营实践已将随机可再生能源的逐步联系与电力系统储备需求的增加定性地联系在一起。同时，兆瓦级电池储能系统（BESS）的价格和技术已大大提高，这使配电网络可调度成为可能。在本文中，我们调查了托管大量随机资源的可调度配电网络对大功率系统的影响。激发该研究的基本问题是：（1）假设部署BESS来实现嵌入随机资源的配电网的可调度性，那么这对大容量电力系统储备需求有何影响？ （2）与从传统发电厂集中采购储备相比，这种BESS的大规模整合在经济上是否可行？为了解决这些问题，我们考虑丹麦输电电网和相关常规电厂机组的情况，并将其与本地调度的配电网进行比较。我们执行随机模拟，以量化和验证以理想的可靠性水平运行这些电力系统所需的储备量。我们在节省的常规备用容量和分配网络中部署的BESS存储量之间建立了数值等效性。然后，我们量化BESS资本支出（CAPEX）的经济回报时间。结果表明：（1）具有可调度配电网络的BESS的大规模部署是解决大容量电力系统灵活性要求的可行技术解决方案；（2）该解决方案在经济上可行，投资回收期在与传统电厂提供灵活性相比，需要11-14年的时间。

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