摘要
为研究大规模光伏经柔性直流送出系统交流侧故障对系统故障穿越期间直流电压、有功功率等的影响,提出了基于等效受控电流源模型的建模分析方法。首先,定性分析了大规模光伏经柔性直流送出系统交流故障穿越特性,将送端交流侧故障对柔性直流系统直流电压的影响间接转化为系统有功功率特性研究。然后,基于故障期间光伏侧逆变器和送端换流站运行控制特性建立了全系统等效受控电流源模型,探究了光伏侧逆变器电流设定值和送端换流站电流限幅值对有功功率传输特性的影响,进而提出了故障期间光伏侧逆变器和送端换流站电流参数的优化设计方法。最后,通过PSCAD/EMTDC仿真验证了所提方法的有效性。
In order to study the influence of AC faults on the DC voltage and active power of large-scale photovoltaic(PV)power transmission system via voltage source converter based high voltage direct current(VSC-HVDC)during the fault ride-through process,a modeling and analysis method based on equivalent controlled current source model is proposed.Firstly,the AC fault ridethrough characteristics of the large-scale photovoltaic power transmission system via VSC-HVDC are qualitatively analyzed,and the influence of AC-side fault at the sending-end on the DC voltage of the VSC-HVDC is indirectly translated into the research of the ac⁃tive power characteristics of the system.Then,based on the operation control characteristics of the PV side inverter and the sendingend converter station during the fault,the equivalent controlled current source model of the whole system is established to explore the influence of the current setting value of the PV side inverter and the current limiting value of the sending-end converter station on the active power transmission characteristics,and then the optimal design method of the current parameters of the PV side inverter and the sending-end converter station during the fault period is proposed.Finally,the effectiveness of the proposed method is verified by PSCAD/EMTDC simulation.
作者
张野
李凌
杨子千
熊莉
唐王倩云
刘蔚
ZHANG Ye;LI Ling;YANG Ziqian;XIONG Li;TANGWANG Qianyun;LIU Wei(State Key Laboratory of HVDC,Electric Power Research Institute,CSG,Guangzhou 510663,China;Power Dispatching and Control Center of Guangxi Power Grid Co.,Ltd.,Nanning 530023,China)
出处
《南方电网技术》
CSCD
北大核心
2024年第3期14-25,92,共13页
Southern Power System Technology
基金
国家自然科学基金青年科学基金资金项目(52207110)。
关键词
光伏
柔性直流系统
故障穿越
等效受控电流源模型
photovoltaic power
VSC-HVDC
fault ride-through
equivalent controlled current source model
