摘要
基于模块化超导储能系统,提出一种电网电压快速补偿算法。当补偿单相电压时,该算法以电网电压的基波为基准得到虚拟的另外两相电压,构成虚拟三相系统,通过dq变换检测凹陷,并与参考信号比较得到谐波和凹陷量。与传统电压控制算法相比,该算法省略了低通滤波环节,简单可靠,避免了补偿单相电压时构造三相系统带来的延时,缩短了系统响应时间。
Based on dq transform, a voltage control strategy of single-phase network for modularized superconductive magnetic energy storage （SMES） system is proposed. In this strategy the fundamental voltage of single-phase network is taken as the reference standard to obtain fictitious voltages of other two phases, so a virtual three-phase network is constructed. Then by means of dq transform and mathematical operation, the harmonics and voltage sag, which could be compensated by SMES system, are obtained. Compared with traditional single-phase voltage control strategy, the proposed method is simple and reliable, in which the low-pass filter can be omitted, the time-delay of signal can be avoided while the three-phase system is constructed, and the system response time is speeded up.
出处
《电网技术》
EI
CSCD
北大核心
2006年第22期95-98,共4页
Power System Technology
基金
国家杰出青年科学基金资助项目(50225723)~~
关键词
dq变换
单相电压
超导储能(SMES)
级联型换
流器
滤波
电压补偿
dq transform
single-phase voltage
superconductive magnetic energy storag （SMES）. cascaded converter
harmonics filter
voltage compensation
