| 引用本文: | 陆海强,王金跃,钱进.模块化限流式统一潮流控制器的改进调制与控制策略研究[J].电力系统保护与控制,2018,46(14):136-142.[点击复制] |
| LU Haiqiang,WANG Jinyue,QIAN Jin.Modified modulation and control strategy of unified power flow controller based on modular multilevel converters with solid state fault current limiter[J].Power System Protection and Control,2018,46(14):136-142[点击复制] |
|
| 摘要: |
| 统一潮流控制器(UPFC)能灵活调节电网潮流，是能源互联网的重要设备。提出了一种模块化多电平换流器与固态限流器相结合的模块化限流式统一潮流控制器的拓扑结构。首先分析该拓扑结构的工作机理，推导出系统的数学模型。提出一种改进型最近电平调制策略，能有效提高交流输出电压的波形质量。根据数学模型提出了MMC-UPFC的串并联侧的控制策略。同时，提出了交流系统故障时，限流器的控制策略。最后在PSCAD/EMTDC平台建模仿真验证所提拓扑结构、调制策略及控制策略的有效性。 |
| 关键词: 统一潮流控制器 固态限流器 模块化多电平换流器 改进最近电平调制 控制策略 |
| DOI：10.7667/PSPC170749 |
| 投稿时间：2017-05-18修订日期：2017-09-03 |
| 基金项目: |
|
| Modified modulation and control strategy of unified power flow controller based on modular multilevel converters with solid state fault current limiter |
| LU Haiqiang,WANG Jinyue,QIAN Jin |
| (Jiaxing Hengchuang Electric Device Co., Ltd, Jiaxing 314000, China) |
| Abstract: |
| Unified Power Flow Controller (UPFC) is an essential device of the energy internet due to its flexible regulating ability on power flow. This paper proposes a topology of a Modular Multilevel Converter (MMC) based UPFC combined with a Solid State Fault Current Limiter (SSFCL). Firstly, working mechanism and mathematical model of the topology are analyzed. Secondly, a modified Nearest Level Modulation (NLM) which can effectively improve the waveform quality of output voltages is proposed. Thirdly, control strategies of the shunt and series sides of MMC-UPFC are proposed based on mathematical model. And then, the control strategy of the SSFCL is proposed when the AC fault occurs. Finally, the effectiveness of topology, modulation method and control strategies are verified by PSCAD/EMTDC simulation models. |
| Key words: unified power flow controller solid state fault current limiter modular multilevel converters modified nearest level modulation control strategy |
