摘要
逆变器作为电力系统UPS(Uninterruptible Power Supply)的输出端,直接向调度自动化系统、变电站远动通讯装置、故障信息子站等提供高质量、高可靠性的交流净化电源。针对传统逆变器存在的输出电压波形质量差,直流电压利用率低,谐波含有率高等问题,建立了三相PWM逆变器在三相静止坐标系和两相旋转坐标系下的数学模型。研究了其基于电压空间矢量和电压电流双闭环控制的逆变器控制策略,并在Matlab的Simulink中进行了系统仿真。仿真结果表明,控制策略合理,满足电力系统用UPS要求。
As the UPS output terminal, inverter directly supplies purified AC power source with high quality and high reliability for power dispatching automation system, substation RTU and relay protection fault information subsystem. In order to improve the wave form quality, utilization efficiency of DC voltage, and decrease total harmonic distortion, a three-phase PWM inverter mathematical model is established in the three-phase stationary coordinate system and two-phase rotating coordinate system in this paper. In addition, the control strategy based on voltage space vector and voltage-current dual-loop control is studied, and it is simulated under Matlab/Simulink. The simulating result has proved that the control strategy is practicable and reasonable, and it can meet the requirement for UPS in power system.
出处
《山西电力》
2016年第2期18-22,共5页
Shanxi Electric Power
