风场经柔直送出系统次同步振荡传播特性研究  

Study on propagation characteristics of sub-synchronous oscillations in wind farm via MMC-HVDC system

作　　者：曹跃龙 邹小明 仇子铭 杜雄[1] CAO Yuelong;ZOU Xiaoming;QIU Ziming;DU Xiong(School of Electrical Engineering,Chongqing University,Chongqing 400044,China;Jiangsu Electric Power Test Research Institute Co.Ltd.,Nanjing 211103,China;State Grid Jiangsu Electric Power Co.Ltd.Research Institute,Nanjing 211103,China)

机构地区：[1]重庆大学电气工程学院,重庆400044 [2]江苏省电力试验研究院有限公司,江苏南京211103 [3]国网江苏省电力有限公司电力科学研究院,江苏南京211103

出　　处：《华中科技大学学报（自然科学版）》2024年第7期29-36,共8页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(52207188).

摘　　要：针对风电场经柔直送出系统中的次同步振荡会在换流器交直流侧之间传播的问题,提出了次同步振荡传播系数来定量描述次同步振荡在柔直系统中的传播.基于次同步振荡传播系数,研究了次同步振荡在柔直系统中的传播特性,并以此为依据确定了风场经柔直送出系统中次同步振荡监测设备的布置位置,同时提出了确定振荡主导换流器的判据.结果表明:次同步振荡在从送端换流器的交流侧传播到直流侧的过程中可能放大振荡,并进一步传播到受端换流器的交流侧,因此在柔直直流侧与受端换流器交流侧都应该布置振荡监测设备;次同步振荡几乎不能从送端换流器直流侧传播到其交流侧,因此当风场观测到明显振荡现象时,可以判断送端换流站为振荡主导换流器.Aiming at the problem that the sub-synchronous oscillations in the wind farm via modular multilevel converter based high-voltage direct current(MMC-HVDC)system will propagate between the AC and DC sides of the converter,the sub-synchronous oscillation propagation coefficients were proposed to quantitatively describe the propagation of the sub-synchronous oscillations in the system.Based on the sub-synchronous oscillation propagation coefficients,the sub-synchronous oscillation propagation characteristics in the MMC-HVDC system were studied,and based on the characteristics,the placement of the sub-synchronous oscillation monitoring equipment in the system was determined.At the same time,the criterion of determining the dominant converter for the oscillation was proposed.The results show that the sub-synchronous oscillation may be amplified in the propagating from the AC side to the DC side of the sending-end converter,and further propagate to the AC side of the receiving-end converter,therefore,the oscillation monitoring equipment should be placed in the DC side of the MMC-HVDC system and the AC side of the receiving-end converter.The sub-synchronous oscillations can hardly propagate from the DC side to the AC side of the sending-end converter,therefore,when a significant oscillation phenomenon is observed in the wind farm,it can be judged that the sending-end converter is the dominant converter in the wind farm via MMC-HVDC system.

关 键 词：风场 基于模块化多电平的柔直系统 次同步振荡 振荡传播 振荡监测 

分 类 号：TM46[电气工程—电器]