| 引用本文: | 饶 宏,李建国,宋 强,许树楷,陈 名,黎小林.模块化多电平换流器直流输电系统损耗的计算方法及其损耗特性分析[J].电力自动化设备,2014,34(6): |
| RAO Hong,LI Jianguo,SONG Qiang,XU Shukai,CHEN Ming,LI Xiaolin.Loss calculation method and characteristics analysis for MMC-HVDC system[J].Electric Power Automation Equipment,2014,34(6): |
|
| 摘要: |
| 为了实现柔性输电工程的系统效率评估计算和换流器散热设计，模块化多电平换流器（MMC）的损耗计算非常重要。为此提出了一种MMC损耗的数字计算方法，通过在数字计算程序中复现出一个工频周期内各开关器件脉冲波形和各开关器件的电压波形和电流波形，并根据器件的关键参数得到各开关器件的损耗。利用所提方法可设计专门的计算程序，对基于MMC的柔性直流输电系统在全运行工况的损耗进行了详细的分析计算，并分析了各器件的损耗特性及其差异，以及开关频率和2倍频环流对换流器损耗的影响。 |
| 关键词: 模块化多电平换流器 柔性直流输电 开关损耗 通态损耗 换流器 损耗 |
| DOI： |
| 分类号: |
| 基金项目:国家高技术研究发展计划（863计划）资助项目（2011AA05A102） |
|
| Loss calculation method and characteristics analysis for MMC-HVDC system |
|
RAO Hong1, LI Jianguo2, SONG Qiang2, XU Shukai1, CHEN Ming1, LI Xiaolin1
|
|
1.EPRI of China Southern Power Grid，Guangzhou 510080，China;2.Department of Electrical Engineering，Tsinghua University，Beijing 100084，China
|
| Abstract: |
| The calculation of MMC（Modular Multilevel Converter） loss is very important for the evaluation of VSC-HVDC system efficiency and the design of converter heat radiation，for which，a digital calculation method is proposed. The switching waveforms，voltage waveforms and current waveforms for a power frequency cycle are reproduced by the digital calculation program and the switching losses are acquired from the key parameters of concerned devices. A special calculation program is designed based on the proposed method，and the total losses of MMC-HVDC system are calculated and analyzed in detail for all operating conditions. The differences of loss characteristics among different devices and the impacts of switching frequency and double-frequency circulating current on the MMC loss are analyzed. |
| Key words: modular multilevel converter VSC-HVDC switching loss conduction loss electric converters losses |
