[1]任成林,周竞宇,宋志顺,等.模块化多电平换流器不控充电特性研究[J].高压电器,2019,55(04):108-116.[doi:10.13296/j.1001-1609.hva.2019.04.016]
 REN Chenglin,ZHOU Jingyu,SONG Zhishun,et al.Characteristics Research of Modular Multilevel Converter Uncontrolled Charging[J].High Voltage Apparatus,2019,55(04):108-116.[doi:10.13296/j.1001-1609.hva.2019.04.016]
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模块化多电平换流器不控充电特性研究()
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《高压电器》[ISSN:1001-1609/CN:61-11271/TM]

卷:
第55卷
期数:
2019年04期
页码:
108-116
栏目:
研究与分析
出版日期:
2019-04-15

文章信息/Info

Title:
Characteristics Research of Modular Multilevel Converter Uncontrolled Charging
文章编号:
0108-0116
作者:
任成林1 周竞宇1 宋志顺2 苟锐锋2 任军辉2 杨帆2 蔡永梁1
1. 中国南方电网超高压输电公司,广州510620;2. 西安西电电力系统有限公司,西安710065
Author(s):
REN Chenglin1ZHOU Jingyu1SONG Zhishun2GOU Ruifeng2REN Junhui2 YANG Fan2CAI Yongliang1
1. CSG EHV Power Transmission Company,Guangzhou 510620,China;2. Xi’an XD Power System Co.,Ltd.,Xi’an 710065,China
关键词:
模块化多电平三次谐波充电电压不控充电
Keywords:
modular multi?levelthird harmoniccharging voltageuncontrolled charging
DOI:
10.13296/j.1001-1609.hva.2019.04.016
摘要:
目前,对模块化多电平换流器(modular multilevel converter,MMC)的启动特性的研究主要集中在换流 器的启动方法的研究与分析,未对换流器启动过程中换流器交/直流侧的电压及双端系统不控充电过程中的 交互影响作用进行分析。从鲁西异步联网工程模块化多电平换流器的基本结构及交流侧不控充电的原理 出发,详细分析了换流器单端启动过程中交/直流侧的电压及双端系统不控充电过程中的交互影响作用。分 析表明,针对鲁西异步联网工程系统结构,单端不控充电过程会在直流极线上产生三次谐波;双端不控充电 中,三次谐波的分布会根据两端交流系统的相角差不同而改变,同时直流电压也会根据两端交流系统的相 角差不同而改变;各桥臂功率模块电压和及直流电压甚至会超过阀侧交流线电压的峰值。在PSCAD/ EMTDC中搭建了鲁西异步联网柔性直流单元充电仿真模型,对鲁西异步联网工程的充电模型进行仿真研 究,同时将研究结果与鲁西异步联网工程不控充电过程进行了对照分析,验证了文中推导及分析的正确性。
Abstract:
At present,the researches on the start?up characteristics of modular multilevel converter(MMC)mainly focus on the research and analysis of the start?up method of the converter. The AC / DC voltage and the interactive ef? fect of the two terminal system on charging are not analyzed. Based on the basic structure of modular multilevel con? verter in Luxi asynchronous interconnection project and the principle of uncontrolled charging on the AC side,the voltage of AC / DC side and the interaction effect between two terminal systems during the uncontrolled charging pro? cess are analyzed in detail. The analysis shows that according to the Luxi asynchronous networking system structure, the one terminal uncontrolled charging process will generate the third harmonic on the DC polar line. In the two termi? nals uncontrolled charging,the distribution of the third harmonic will be determined according to the phase differ? ence between the two terminals of the AC system and the DC voltage will also change according to the phase difference between the two terminal of the AC system; the sum voltage of power modules in the each bridge arm and the DC volt? age may even exceed the peak value of the AC line voltage on the valve side.The charging simulation model for VSC? HVDC of Luxi asynchronous network project is established in PSCAD/ EMTDC. Through the simulation research on the charging model of Luxi asynchronous network project,the research results are compared with the uncontrolled chargingprocessofLuxiasynchronousnetworkproject.verifiedthecorrectnessoftheanalysisisderivedinthispaper.

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备注/Memo

备注/Memo:
收稿日期:2018?10?09; 修回日期:2018?12?05; 任成林(1971—),男,高级工程师,硕士,主要研究方向为 柔性直流输电和高压直流输电。
更新日期/Last Update: 2019-04-16