配电网下多虚拟电厂间计及过网费的端对端电能交易方法

Peer-to-Peer Power Trading Among Virtual Power Plants Considering Network Fees in Distribution Network

随着电力体制改革和售电侧市场的开放,端对端交易逐渐成为促进分布式能源消纳的重要手段。然而,分布式能源存在容量小、位置分散等问题,亟需一种能源管理模式对其聚合管理,并且现有交易机制中,存在过网费设计无法有效促进能源就近消纳的问题。在此背景下,文章提出了配电网下多虚拟电厂间计及过网费的端对端电能交易方法研究。首先,设计了虚拟电厂间端对端电能交易的总体架构;其次,建立虚拟电厂优化模型,对虚拟电厂的所属节点进行出力优化,并根据优化所得的偏差电量制定下一匹配阶段的报量策略和报价策略;随后,设计计及过网费的交易匹配机制,并建立基于配电网交流潮流模型的安全校验模型和阻塞管理模型,在保证配电网安全稳定运行的前提下对初始匹配订单进行管理与削减。算例表明,文章所提的多虚拟电厂间端对端电能交易方法可有效促进能源就近交易并降低虚拟电厂的综合运行成本。

With the advances in power systems and the opening of electricity retail markets,peer-to-peer transactions have become essential for promoting the integration of distributed energy resources.However,owing to their small individual capacity and dispersed locations,such resources demand an efficient energy management paradigm for aggregation.Furthermore,the existing transaction mechanisms exhibit shortcomings in the design of network tariff fees,hindering their effectiveness in promoting the localized consumption of energy.In this context,this paper proposes a mechanism and model for peer-to-peer energy trading between virtual power plants(VPPs)considering the power flow of the distribution network under multiple access nodes.First,the overall architecture of peer-to-peer power trading between multiple VPPs is designed.Second,an optimization model for VPPs is established to optimize the output of VPPs at different connection points.Based on the optimization results,strategies of bidding for the next matching phase are formulated.Subsequently,a trading matching mechanism that considers network charges is designed,and safety verification models and congestion management models based on the optimal power flow of the distribution network are established to manage the matched orders.Finally,the effectiveness of the proposed mechanisms and models is validated through a case study in the IEEE33 node system.