强磁场链式无功补偿器的均压与冗余容错研究  

Strong magnetic chain STATCOM equalizing with redundant fault-tolerant research

作　　者：刘嘉 刘小宁[2] 费伟[2] 陈思明[2] 

机构地区：[1]中船重工鹏力(南京)新能源科技有限公司,江苏南京211106 [2]中国科学院强磁场科学中心,安徽合肥230031

出　　处：《电工电能新技术》2016年第9期14-20,共7页Advanced Technology of Electrical Engineering and Energy

基　　金：国家自然科学基金资助项目(50977086)

摘　　要：随着无功补偿装置的高压需求,级联拓扑被越来越多地应用于STATCOM中,然而随着链节单元的增加,系统的复杂度以及故障率也随之提高,同时各链节直流侧电压的平衡也一直都是链式STATCOM研究的热门问题。本文基于上述问题,针对在研的强磁场超导磁体电源无功补偿方案,提出一种上层均压控制策略,实现STATCOM系统的链节均压;并将高压变频领域中性点偏移技术引入STATCOM系统中,故障时系统通过更改电压外环控制策略,实现输出三相电压的中性点偏移,直接提高了链节单元的利用率。最后通过仿真验证了本文所提出的均压策略以及中性点偏移容错方法是正确有效的。With the requirements of high-voltage reactive power compensation device cascaded topology is more and more used in cascade STATCOM. However,with the number of units increases,the complexity of the system and the failure rate is also increased,while voltage balancing of each DC section also has been a hot research issue of STATCOM. Based on the above problem,a control scheme is proposed for a strong magnetic field superconducting reactive power compensation scheme in research. The neutral point offset technology of high voltage inverter is introduced in the STATCOM to achieve the neutral point offset in three phase voltage and to increase the utilization of the chain units. Finally,simulation verifies that the equalizing of the neutral point offset tolerant strategy is effective and correct.

关 键 词：无功补偿 均压控制 超导电源 中性点偏移 冗余容错 

分 类 号：TL629[核科学技术—核技术及应用]