6kV链式STATCOM结构及控制策略研究

Research of structure and control strategy of 6kV chain STATCOM

提出了6kV链式静止同步补偿器的设计方案。该补偿器采用H桥级联主电路结构和载波相移-正弦脉宽调制方式,交流侧采用前馈解耦控制和适用于大功率静止同步补偿器的谐波分频控制策略,运用三级平衡控制思想解决了直流侧BUS电容电压不平衡问题。仿真结果验证了该STATCOM结构的优越性和控制策略的可行性。

The paper proposed a design scheme of 6 kV chain static synchronous compensator. The compensator uses H-bridge cascade main circuit structure and carrier phase shifted sinusoidal pulse-width modulation, the AC side uses feed forward decoupling control and harmonic divide control strategy for high-power STATCOM. The compensator uses three-level balance control idea to solve problem of BUS capacitive voltage imbalance at DC side. The simulation results demonstrate superiority of the structure of STATCOM and feasibility of the control strategy.