考虑储能配置模式的多数据源融合分布式光伏发电并网接纳分析方法

Capacity Analysis of Distributed Photovoltaic Generation Integrated into Power Grid Considering Energy Storage Configuration Mode Based on Fusion of Multiple Data Sources

分布式光伏（PV）通常并入配电网,其大规模并网发电将对配电网的安全运行带来挑战,研究分布式光伏发电消纳能力已成为发展分布式光伏的重要内容。针对配电网信息不完整的情况,提出了一种考虑储能配置模式的多数据源融合分布式光伏发电并网接纳分析计算方法,融合来自电网调度系统、配电自动化系统、分布式发电监控系统的实时量测数据及历史数据,计量、营销、负控等系统的电量数据及历史数据,补全了分布式电源并网接纳能力分析模型。考虑电网侧、分布式发电侧等不同配置模式下储能参与电网电压调节的能力,并以电压偏差及电压波动指标作为定量计算的目标值,短路电流、支路载流量等安全性指标作为约束,经济性和可靠性指标作为校验,进行接纳能力分析。最后通过实际配电网算例验证了所提方法的有效性和可行性,结果表明,储能配置在电网侧较配置在分布式发电侧对提高配电网分布式光伏消纳效果更明显,分布式光伏消纳能力可以提高42.5%。

Distributed photovoltaic（PV） generation is usually connected to distribution network,and the rapid development of grid-connected PV will bring great challenges to the safe operation of distribution network,so research of the distributed PV generation absorption capacity has become an important part of the development of distributed PV generation.Consequently,considering the incomplete information in distribution network,we propose a capacity analysis method of distributed PV generation integrated into distribution network considering energy storage configuration mode based on fusion of multiple data sources.Moreover,we optimize the absorption capacity analysis model of the distributed generation via integration of real-time data and historical data from power grid dispatching system,distribution automation system,distributed generation monitoring,and control system,and via integration of electricity data and historical data from metering system,marketing system,and load control system.Considering the ability of energy storage in power system＇s voltage regulation in different configuration modes,such as the grid side and the distributed generation side,the acceptance ability of distribution network is analyzed by taking the target value of voltage deviation and voltage fluctuation as the quantitative calculation,the safety index of short circuit current and branch current carrying capacity as the constraint,and finally by taking the economic and reliability indexes as the checksum.Finally,the experimental results from the actual distribution network verify the effectiveness and feasibility of the proposed method.The results reveal that,compared with the energy storage configuration on the distributed generation side,storage allocation in the grid side can improve the distributed PV accommodation capacity of the distribution network,and the accommodation capacity has been improved by 42.5%.