基于有限采样的柔性直流系统损耗计算方法  

Loss Calculation Method for MMC-HVDC System Based on Finite Sampling

作　　者：彭光强[1] 黄之笛 邢月 武霁阳 何竞松[1] 燕京[1] PENG Guangqiang;HUANG Zhidi;XING Yue;WU Jiyang;HE Jingsong;YAN Jing(Maintenance Test Center of EHV Transmission Company,CSG,Guangzhou 510663,China;Sichuan Energy Internet Research Institute,Tsinghua University,Chengdu 610299,China)

机构地区：[1]中国南方电网超高压输电公司检修试验中心,广州510663 [2]清华四川能源互联网研究院,成都610299

出　　处：《南方电网技术》2022年第11期75-82,共8页Southern Power System Technology

基　　金：中国南方电网有限责任公司科技项目(012000KK52210026,CGYKJXM20210128)。

摘　　要：近年来随着柔性高压直流(modular multilevel converter based high voltage direct current,MMC-HVDC)输电工程的增长,主网架线损率呈上升趋势。对柔性直流工程进行准确高效的损耗计算与分析是研究损耗构成、降损措施的关键步骤。提出了一种基于有限采样的柔性直流系统损耗高效计算方法,该方法考虑脉冲波形及器件阻抗的非线性特征,并可通过改变输入数据快速计算长时段损耗电量,有效解决了长时间尺度损耗精确计算的难题。最后通过与实际工程的测量值进行对比,验证了该算法的准确性。In recent years,with the growth of modular multilevel converter based high voltage direct current(MMC-HVDC)transmis⁃sion systems,the power loss of the main grid increases gradually.The efficient and accurate loss calculation and analysis of MMCHVDC systems is the key step to study the loss composition and loss reduction measures.An effective method is proposed to calculate the MMC-HVDC power loss based on finite sampling.The method considers the nonlinear characteristics of pulse waveform and device impedance,and it can calculate the power loss during a long time period quickly by changing the input data,ef⁃fectively resolve the challenging issue of long time period loss calculation with high accuracy.Finally,the accuracy of the algorithm is verified by comparing with the measured power loss of the actual project.

关 键 词：柔性直流系统 损耗计算 有限采样解析计算 模块化多电平换流器 

分 类 号：TM721.[电气工程—电力系统及自动化]