含高比例分布式光伏的主配网运行风险评估与防控策略研究  

Research on risk warning and prevention strategies for main distribution networks with high proportion distributed photovoltaics

作　　者：梁志峰 康重庆[1] 隋凌峰 于若英 贾亦雄 杜云龙 陈文进 LIANG Zhifeng;KANG Chongqing;SUI Lingfeng;YU Ruoying;JIA Yixiong;DU Yunlong;CHEN Wenjin(Department of Electrical Engineering and Applied Electronics,Tsinghua University,Beijing 100084,China;National Power Dispatch and Control Centre,State Grid Corporation of China,Beijing 100031,China;Northeast Electric Power University,Jilin 132012,China;Nanjing Branch of China Electric Power Research Institute Company,Nanjing 210003,China;Tsinghua Sichuan Energy Internet Research Institute,Chengdu 610213,China;State Grid Jiangsu Electric Power Co.,Ltd.,Nanjing 210000,China;State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310007,China)

机构地区：[1]清华大学电机工程与应用电子技术系,北京100084 [2]国家电网有限公司国家电力调度控制中心,北京100031 [3]东北电力大学,吉林132012 [4]中国电力科学研究院有限公司南京分院,南京210003 [5]清华四川能源互联网研究院,成都610213 [6]国网江苏省电力有限公司,南京210000 [7]国网浙江省电力有限公司,杭州310007

出　　处：《清华大学学报（自然科学版）》2024年第11期1964-1978,共15页Journal of Tsinghua University(Science and Technology)

基　　金：国家电网有限公司总部管理科技研究项目(4000-202218060A-1-1-ZN)。

摘　　要：大规模分布式光伏的接入给主配网运行带来较大风险,为了确保系统的安全性和可靠性、优化主配网资源,该文研究了大规模分布式光伏接入的主配网运行风险评估方法和防控策略。首先,在主配网的安全、平衡和消纳方面,提出了主配网风险评估指标体系;其次,针对主配网是否处于紧急场景,分别提出了主配网风险辅助决策和分层分区紧急切负荷策略;最后,研发了基于调控云的高比例分布式光伏并网风险智能分析与防控决策系统,并在地区电网开展了示范应用。算例分析和示范应用效果均证明了所提的方法和策略能够对电网可能发生的安全、平衡和消纳等方面的风险进行在线评估和防控,有效提升了分布式新能源并网运行的风险防控能力,为电网运营商和决策者提供了有价值的参考,进一步推动清洁能源的可持续发展。[Objective] Compared with centralized photovoltaics,distributed photovoltaics have smaller individual capacities and dispersed access points,which are mainly connected through the low-voltage power grid towards the end.They have the characteristics of superimposed new energy fluctuations,intermittency,uncertainty.With the increase in the scale of distributed photovoltaic access,there will be a greater risk to the operation of the main distribution network.To ensure the safety and reliability of the system and optimize the resources of the main distribution network,we investigate the risk assessment methods and prevention strategies for the operation of the main distribution network of large-scale distributed photovoltaic access.[Methods] In terms of safety,balance and consumption of the main distribution grid,the problem of extracting risk characteristics and constructing a risk assessment index system for operating the main distribution grid after the high proportion of distributed new energy connected to the grid was evaluated.We proposed a risk feature extraction model based on a random forest and identified important power grid nodes.A large-scale survey based on actual production was conducted on a power grid in Jiangsu region of China,and a risk assessment index system for the coordinated operation of the main distribution network was proposed.To address the operational risks of the main distribution network caused by the high proportion of distributed new energy integration,research is being conducted on the risk prevention and control methods for the main distribution network.We proposed an auxiliary decision-making method for adjusting the main distribution network mode plan in non-emergency situations and established a two-stage risk scheduling model.Considering an emergency scenario where the risk level of the main distribution grid is high after the high proportion of distributed new energy is connected to the grid,a layered and partitioned emergency load-shedding strategy was studied for the main dis

关 键 词：风险评估 防控策略 高比例光伏 主配网 切负荷 

分 类 号：TP393.1[自动化与计算机技术—计算机应用技术]