光伏和电池储能系统渗透率不平衡的低压配电网络中的电压调节

IF 2.4 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC IET Smart Grid Pub Date : 2024-02-01 DOI:10.1049/stg2.12155
Alexander Micallef, Cyril Spiteri-Staines, John Licari
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引用次数: 0

摘要

并网制约因素限制了可再生能源在马耳他的应用潜力。光伏发电在低压配电网络中的大量应用,由于其固有的间歇性,对电网的稳定性构成了重大风险,而且众所周知会导致过电压和逆功率流。作者评估了采用分布式电池储能系统的自消费策略如何有助于低压配电网的电压调节和减少反向功率流。在将反向功率流注入低压电网之前,对电池进行控制,以吸收住宅共同耦合点的反向功率流。模拟结果表明,在逆功率流和晚间高峰需求期间,非协调策略并不适合应对配电网络的挑战。另一方面,通过随时间变化的上网电价(FiT)协调自用电,可为用电户带来更高的利润,同时为电力公司带来额外收益。在采用随时间变化的上网电价(FiT)的自发自用方案中,随着储能容量的增加,用户的净账单盈利能力将从非协调方案的下降趋势转变为上升趋势。
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Voltage regulation in low voltage distribution networks with unbalanced penetrations of photovoltaics and battery storage systems

Grid integration constraints are limiting the deployment potential of renewable energy sources in Malta. Large penetrations of photovoltaics in the low voltage (LV) distribution network pose a significant risk to grid stability due to their inherent intermittency and are known to cause overvoltages and reverse power flows. The authors evaluate how self-consumption strategies with distributed battery energy storage systems can contribute to the voltage regulation in LV networks and the reduction of reverse power flows. The batteries are controlled to absorb the reverse power flow at the dwellings' point of common coupling, before this is injected into the LV network. Simulations show that uncoordinated strategies are not suitable to address the distribution network challenges during reverse power flows and evening peak demands. On the other hand, self-consumption coordinated by a time-varying feed-in tariff (FiT) can provide higher profitability to the prosumers while providing added benefits to the utility. The net-billing profitability for the prosumers in a self-consumption scenario with time-varying FiT is transformed from the downward trend of the uncoordinated scenario to an upward trend against the increasing values of storage capacity.

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来源期刊
IET Smart Grid
IET Smart Grid Computer Science-Computer Networks and Communications
CiteScore
6.70
自引率
4.30%
发文量
41
审稿时长
29 weeks
期刊最新文献
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