海上油气平台不稳定电源与储能联合配置优化策略

Joint configuration optimization strategy of unstable power supply and energy storage for offshore oil and gas platforms

针对海上油气平台集群接入不稳定电源与储能的联合配置问题,结合海上风电、光伏特点及已有的拓扑结构,提出了三阶段风机/光伏/储能阶段式联合配置策略,介绍嵌入潮流计算的阶段式粒子群算法。第一阶段通过LightGBM网络预测模型得到风机光伏的时序预测发电功率,再以投资建设经济性和潮流稳定性为目标优化每个节点的风机/光伏容量;第二阶段针对不稳定电源配置后的配电网,提出了基于电压和损耗灵敏度为指标的集群划分方法,将配电网集群划分为若干个子集群;第三阶段根据划分后的子集群,以储能容量、配电网损耗和节点电压波动为目标为每个子集群内配置储能。以渤海油田某10 kV实际油气平台配电网为例,设立燃气机出力功率自定义和经济性自定义两种方案来验证联合配置优化决策的合理性。结果表明,两种配置策略都可以有效地提升海上油气平台配电网的潮流稳定性,提高新能源的渗透率。本文研究验证了海上分散式风机/光伏发电工程的可行性,有利于实现未来海上油气平台的“零碳”建设。

Aiming at the joint configuration of offshore oil and gas platform cluster access to unstable power supply and energy storage,combined with the characteristics of offshore wind power and photovoltaic and existing topology,this paper proposes a staged joint configuration strategy of wind turbine/photovoltaic/energy storage and introduces the staged particle swarm optimization embedded in power flow calculation.In the first stage,the prediction model of LightGBM is applied to obtain the time series prediction power generation of wind turbine/photovoltaic,and then the wind turbine/photovoltaic capacity of each node is optimized with the goal of investment and construction economy and power flow stability.In the second stage,a cluster division method based on voltage and loss sensitivity is proposed for the distribution network with an unstable power supply configuration.The distribution network cluster is divided into several sub-clusters.In the third stage,according to the divided sub-clusters,energy storage capacity,distribution network loss,and node voltage fluctuation are configured for each subcluster in terms of energy storage.Taking a real 10 kV distribution network of oil and gas platform in Bohai sea as an example,two schemes of customized gas turbine output and customized economy are set up to verify the rationality of the joint configuration optimization strategies.The results indicate that both configuration strategies can effectively improve the flow stability of offshore oil and gas platform distribution networks and increase the penetration rate of new energy.This study verifies the feasibility of offshore decentralized wind turbine/photovoltaic power generation projects,which is beneficial for achieving zero carbon construction of offshore oil and gas platforms in the future.