考虑新能源出力特性的嵌入式直流功率运行曲线研究  

Research on Embedded DC Power Operation Curves Considering Output Characteristics of New Energy

作　　者：付俊波[1] FU Junbo(NR Electric Co.,Ltd.,Nanjing Jiangsu 211102,China)

机构地区：[1]南京南瑞继保电气有限公司,江苏南京211102

出　　处：《湖北电力》2024年第5期15-20,共6页Hubei Electric Power

基　　金：国家重点研发项目(项目编号:2023YFB2405900)。

摘　　要：新能源大规模并网导致线路潮流变化频繁,在省内规划嵌入式直流可以有效提高区域间功率互济。然而,直流功率运行曲线对提高新能源消纳率及系统运行经济性至关重要。为此,提出了一种考虑新能源出力特性的嵌入式直流功率运行曲线。首先,分析了嵌入式直流运行特点,并建立了含嵌入式直流的机电暂态模型;其次,分析了直流运行功率与交流通道的耦合关系,提出了不同的直流功率运行功率方案;最后,通过对比选择了考虑新能源出力以及跟随相关度最高的过江中通道输电线路功率的嵌入式直流功率运行曲线。仿真结果表明,提出的控制策略能够提高嵌入式直流利用率,促进新能源友好消纳。The large-scale grid connection of new energy leads to frequent changes in power flow of the line,and the embedded DC planning in the province can effectively improve the power exchange between regions.However,the DC power operation curve is very important to improve the consumption rate of new energy and the system operation economy.Therefore,this paper proposes an embedded DC power operation curve considering the output characteristics of new energy.Firstly,the characteristics of embedded DC operation are analyzed,and the electromechanical transient model including embedded DC is established.Secondly,the coupling relationship between DC operation power and AC channel is analyzed,and different DC operation power schemes are proposed.Finally,by comparison,the embedded DC power operation curve considering the new energy output and following the power of the transmission line with the highest correlation is selected.The simulation results show that the control strategy proposed in this paper can improve the embedded DC utilization rate and promote the new energy friendly consumption.

关 键 词：嵌入式直流 新型电力系统 直流功率 新能源 机电暂态模型 输电线路 电网潮流 

分 类 号：TM73[电气工程—电力系统及自动化] TM721.1