基于短路比约束的受端电网新能源并网出力优化方法研究  

Research on optimization method of new energy grid-connected output of the receiving power grid based on short-circuit ratio constraint

作　　者：张再驰 王卫[2] 于希娟 周运斌[2] 张文朝 Zhang Zaichi;Wang Wei;Yu Xijuan;Zhou Yunbin;Zhang Wenchao(Electric Power Research Institute,State Grid Beijing Electric Power Company,Beijing 100075,China;Control Center of State Grid Beijing Electric Power Company,Beijing 100031,China;Beijing Kedong Power Control System Co.,LTD.,Beijing 100192,China;North China Electric Power University,Baoding 071066,China)

机构地区：[1]国网北京电力科学研究院,北京100075 [2]国网北京市电力公司调控中心,北京100031 [3]北京科东电力控制系统有限责任公司,北京100192 [4]华北电力大学(保定),河北保定071066

出　　处：《可再生能源》2023年第12期1658-1664,共7页Renewable Energy Resources

基　　金：国网北京市电力公司科技项目(“双碳”背景下的北京电网燃气压减能力评估及运行策略研究)(520223220002)。

摘　　要：在大规模分布式新能源发电资源接入受端电网的情况下,如何能够在保证受端电网并网点处暂态电压稳定性的同时,优化受端电网新能源发电机组的出力,是须要解决的关键问题。文章研究一种基于短路比约束的受端电网新能源并网出力优化方法。首先,通过构建受端电网等效模型,分析分布式新能源发电机组接入后,受端电网暂态电压稳定性的影响因素;其次,结合短路比的物理含义,建立新能源电网并网短路比模型,并将其作为研究受端电网并网点暂态电压稳定性的关键指标;再次,以受端电网新能源弃电成本、火电机组运行成本最小为优化目标,考虑短路比等其他约束条件,建立受端电网新能源出力优化模型,并进行求解;最后,仿真验证所建立的模型,结果表明,优化模型可在一定程度上提高受端电网中新能源的出力水平。In the case of large-scale distributed new energy power generation resources connected to the receiving power grid,how to ensure the stability of transient voltage at the receiving power grid junction point and optimize the output of the new energy generating units in the receiving power grid at the same time is the key problem to be solved.In this paper,an optimization method of new energy output based on short-circuit ratio constraint is studied.Firstly,by constructing the equivalent model of the receiving power grid,the factors affecting the transient voltage stability of the receiving power grid after the distributed new energy generating unit is connected are analyzed.Secondly,combined with the physical meaning of short-circuit ratio,the short-circuit ratio model of new energy grid is established,and it is used as a key index to study the transient voltage stability of the receiving power grid.Then,the new energy output optimization model of the receiving power grid is established with the minimum abandonment cost of the new energy and the operating cost of the thermal power unit as the optimization goal,and other constraints such as the short-circuit ratio are considered.Finally,the simulation verifies the model,and the results show that the optimized model can improve the output level of new energy in the receiving power grid to a certain extent.

关 键 词：短路比 受端电网 新能源并网出力 消纳优化 暂态电压 

分 类 号：TK51[动力工程及工程热物理—热能工程] TK81[电气工程—电力系统及自动化] TM72