电力系统保护与控制
電力繫統保護與控製
전력계통보호여공제
POWER SYSTM PROTECTION AND CONTROL
2009年
13期
58-62
,共5页
裘锦勇%宋文祥%韩杨%姚刚%周莉丹%陈陈
裘錦勇%宋文祥%韓楊%姚剛%週莉丹%陳陳
구금용%송문상%한양%요강%주리단%진진
三电平%PWM整流器%空间矢量控制%d-q解耦%单位功率因数
三電平%PWM整流器%空間矢量控製%d-q解耦%單位功率因數
삼전평%PWM정류기%공간시량공제%d-q해우%단위공솔인수
three-level%PWM rectifier%space vector modulation%d-q decoupling%unity power factor
针对三相二极管箝位型三电平PWM整流器的拓扑结构,建立了基于d-q同步旋转坐标系统的解耦状态空间方程.采用双闭环控制策略,电压环跟踪负载有功功率,电流环实现指令电流跟踪控制.给出了电压环和电流环PI参数设计方法,采用电压空间矢量调制方式(SVPWM)进行了基于MATLAB/Simulink的仿真分析.结果表明,该三电平PWM整流器能实现良好的动态性能和稳态性能,并且使得电网侧电流波形为正弦、功率因数为1.
針對三相二極管箝位型三電平PWM整流器的拓撲結構,建立瞭基于d-q同步鏇轉坐標繫統的解耦狀態空間方程.採用雙閉環控製策略,電壓環跟蹤負載有功功率,電流環實現指令電流跟蹤控製.給齣瞭電壓環和電流環PI參數設計方法,採用電壓空間矢量調製方式(SVPWM)進行瞭基于MATLAB/Simulink的倣真分析.結果錶明,該三電平PWM整流器能實現良好的動態性能和穩態性能,併且使得電網側電流波形為正絃、功率因數為1.
침대삼상이겁관겸위형삼전평PWM정류기적탁복결구,건립료기우d-q동보선전좌표계통적해우상태공간방정.채용쌍폐배공제책략,전압배근종부재유공공솔,전류배실현지령전류근종공제.급출료전압배화전류배PI삼수설계방법,채용전압공간시량조제방식(SVPWM)진행료기우MATLAB/Simulink적방진분석.결과표명,해삼전평PWM정류기능실현량호적동태성능화은태성능,병차사득전망측전류파형위정현、공솔인수위1.
The neutral-point-clamped three-level PWM rectifier topology is studied in this paper, and the decoupled state-space equations in synchronous rotating reference frame (d-q frame) are derived. The hierarchical controller structure is adopted, namely, the inner current-loop is responsible for reference current tracking and the outer voltage-loop is responsible for load regulation. The design methodologies for proportional-integral (PI) controllers are presented, for the inner current-loop and outer voltage-loop, respectively. The proposed three-level PWM rectifier based on space vector pulse-width-modulation (SVPWM) strategy is simulated using MATLAB/SIMULINK. Simulation results demonstrate that the proposed three-level PWM rectifier provides excellent performance both in steady-state and dynamic load variations. Besides, pure sinusoidal waveforms can be achieved in grid currents with a unity power factor.