摘要
单相STATCOM由于具有输出无功电流谐波含量低、响应速度快等优点而适合于不平衡负荷的平衡化补偿。文中给出了采用单相STATCOM实现平衡化补偿的两种主电路结构及电压-无功综合控制方法。三相补偿电流相量采用对称分量法通过矢量变换获得,单相无功功率采用单相瞬时无功功率算法得到,单相逆变器采用特定谐波消除PWM算法(SHE-PWM),以保证输出无功电流的谐波总畸变率小于5%,同时保证直流侧电容电压的稳定。对所给出的补偿方法进行了仿真研究,结果验证了单相STATCOM进行快速平衡化补偿的能力比较强。
Due to the low harmonics in output reactive current and fast response characteristics, single phase STATCOM is suitable for balancing compensation of three phase unbalanced load. Two kinds of main circuit configuration and integrative voltage-reactive power control scheme for balancing compensation with single phase STATCOM is proposed. The three phase compensating current phasors are obtained by symmetrical component method and through vector transform. The single phase reactive power is calculated by the algorithm for single phase instantaneous reactive power. Selective harmonics eliminated PWM (SHE-PWM) is employed to ensure that the THD of output reactive current is less than 5% and that the capacitor voltage at DC side is stable. It is proved by the simulation results of the proposed compensation method that the single phase STATCOM possesses the ability to carry out fast balancing compensation.
出处
《电网技术》
EI
CSCD
北大核心
2003年第8期42-45,71,共5页
Power System Technology
