新能源接入电网后的配网区域裕度评估技术研究与应用  

Research and Application of Regional Margin Assessment Technology After New Energy is Connected to Distribution Network

作　　者：钱金跃 杨玉锐 施力欣 闫威 张宏 吴佳 QIAN Jinyue;YANG Yurui;SHI Lixin;YAN Wei;ZHANG Hong;WU Jia(Pinghu Power Supply Company,State Grid Zhejiang Electric Power Co.,LTD.,Zhejiang Pinghu 314200,China;Jiaxing Power Supply Company,State Grid Zhejiang Electric Power Co.,LTD.,Zhejiang Jiaxing 314000,China)

机构地区：[1]国网浙江省电力有限公司平湖市供电公司,浙江平湖314200 [2]国网浙江省电力有限公司嘉兴供电公司,浙江嘉兴314000

出　　处：《农村电气化》2023年第3期46-52,共7页Rural Electrification

摘　　要：提出了一种新能源入网裕度评估与安全校核方法,旨在提高新能源入网评估效率和系统的安全运行水平。在收集的基础数据基础上,构建了考虑机组启停时间、机组出力限值、旋转备用容量、二次调频容量等约束的新能源入网裕度评估模型,依据该模型得到机组运行计划和最大接入容量;然后结合随机采样技术和机组运行计划,构造含校正控制的最优潮流模型,并将新能源出力预测场景逐一代入模型中进行校验,再根据校验结果,利用分步逼近的策略逐步收缩安装容量的上下界,直至满足收敛条件,并最终获得新能源的最大安全接入容量,为分布式新能源有序接入、网源协同规划提供指导。This paper proposes a margin assessment and security check method for new energy after grid connection.It aims to improve the efficiency of grid connection assessment of new energy and the safe operation level of the system.Based on the basic data,a new energy grid connection margin evaluation model is built considering the constraints of unit startup and shutdown time,unit output limit,rotating reserve capacity,secondary frequency regulation capacity,etc.According to the model,the unit operation plan and maximum access capacity are obtained.Then,combined with random sampling technology and unit operation plan,the optimal power flow model with correction control is constructed.And the new energy output prediction scenarios are substituted into the model one by one for verification.Then,according to the verification results,the upper and lower bounds of the installed capacity are gradually reduced by using the step-by-step approach strategy until the convergence conditions are met.And finally obtain the maximum safe access capacity of new energy.It is used for planning and construction of new energy power stations and provides guidance for orderly access of distributed new energy and coordinated planning of network sources.

关 键 词：新能源入网 电网承载计算 大数据分析 线性规划 

分 类 号：TM619[电气工程—电力系统及自动化]