摘要
并联补偿单元是用户电力统一调节器 ( UCPC)的基本单元 ,由于并联补偿单元和串联补偿单元在拓扑上具有良好的对称性 ,因此 ,并联补偿单元的研究对 UCPC的研制具有相当的普遍意义。文中给出了基于三电平变流器的并联补偿单元的主电路以及驱动与保护系统的设计 ,成功解决了主电路中器件耐压问题 ,并降低了输出电压电流中的谐波含量 ;同时还给出了基于双 DSP的先进的全数字控制系统的设计 ,快速 DSP的使用是实现基于重复控制和无差拍控制的上层算法和基于电压空间矢量的脉冲发生器的重要保证 ;在控制策略上 ,由于在无差拍控制的基础上采用了重复控制的原理 ,变流器可以同时完成谐波、无功与不对称的补偿。实验结果证明了设计的正确性 ,也表明UCPC并联单元的研制取得了阶段性成功。
Parallel compensation unit is the basic one of universal custom power conditioner (UCPC). Study on it is useful tothe research of UCPC because of the symmetry between the topology of parallel unit and serial one. Design of main circuitbased on tri-level converter is presented to solve the problems of voltage sustainability. voltage harmonic and currentharmonic. The hardware of control system based on dual-DSP is also presented to realize real-time calculation of controlalgorithm of dead-beat control and voltage space vector PWM. The principle and simulation result of control are presented.and the capability of parallel unit to compensate VAR, harmonic and unbalances is proved in this paper. The validity of themain circuit and control algorithm is proved by experimental result.
出处
《电力系统自动化》
EI
CSCD
北大核心
2000年第12期25-28,64,共5页
Automation of Electric Power Systems
