新能源采用柔直电网送出功率盈余问题解决方案  

Solution for Power Surplus of Flexible DC Grid Transmission on New Energy

作　　者：彭花娜 周杨 梅念[3] 代妍妍 方乙君 PENG Hua-na;ZHOU Yang;MEI Nian;DAI Yan-yan;FANG Yi-jun(PowerChina Fujian Electric Power Engineering Co.,Ltd.,Fuzhou 350003,China;State Grid Corporation of China,Beijing 100031,China;State Grid Economic and Technological Research Institute Co.,Ltd.,Beijing 102209,China)

机构地区：[1]中国电建集团福建省电力勘测设计院有限公司,福建福州350003 [2]国家电网有限公司,北京100031 [3]国网北京经济技术研究院有限公司,北京102209

出　　处：《电力勘测设计》2021年第2期68-73,78,共7页Electric Power Survey & Design

摘　　要：张北柔性直流电网工程采用真双极接线,在单极故障后,非故障极转带故障极部分或全部损失的功率时,可能造成功率盈余问题。经比较后,推荐在送端换流站装设交流耗能装置,通过投入交流耗能装置消耗盈余功率,使非故障极正常工作,再有序切除风机,确保孤岛方式下的交流侧电网平衡,保障柔直电网的安全稳定运行。This paper points out that Zhangbei Flexible DC grid project with true bipolar wiring,when happens a unipolar fault,part or all lost power will turn to the non-faulty poles,may cause power surplus problems.After comparison,recommends AC chopper installing at the converter stations.AC chopper is used to consume the surplus power to make the non-faulty poles work normally,and then the fans are removed in an orderly manner to ensure the balance of the AC-side power grid in the island mode,and guarantee the safety for Flexible DC grid.

关 键 词：新能源送出 功率盈余 直流耗能装置 交流耗能装置 

分 类 号：TM7[电气工程—电力系统及自动化]