针对五电平有源中点箝位型(5L-ANPC)逆变器在电网中的应用，提出一种载波移相调制下输出电压谐波的解析计算方法。首先将5L-ANPC逆变器等效为电容箝位型三电平级联逆变器，然后进一步等效为两电平H桥级联逆变器。根据叠加关系及两电平输出电压谐波的解析表达式，推导出5L-ANPC逆变器输出电压谐波的解析表达式。仿真与实验...
虽然ANPC⁃5L变换器的研究已经进行了很多年,但电容电压平衡算法仍然是研究的重点。如果不能很好地控制电容电压,可能会导致开关因应力过大而失效,降低系统效率和性能,增加THD。 为了解决这一问题,近年来提出了几种调制方法,如选择谐波消除PWM(SHEPWM)和SVP⁃WM。SHEPWM方法是调节浮动电容(floating ca⁃pacitor,...
有源中点箝位型五电平(ANPC-5L)逆变器的死区效应会导致相电压跨电平状态的跳变,跨电平的脉宽调制(PWM)波经过长电缆传输至电机侧又会产生将近2倍的过电压,严重影响设备安全.传统以相电流极性为基础的死区效应消除方法对传感器的精度要求较高,且在电流过零点附近极易出现误判.针对上述问题,提出了一种无传感器的ANPC...
PWM逆变器输出电压的谐波分析 本文提出了用梯形脉宽调制(TPWM)降低逆变器谐波的一种新方法.在逆变器中,它比正弦脉宽调制(SPWM)方法更能体现优越的谐波控制性能,可以断定,利用这种新的方法能极容易... 吴安顺,徐绍清 - 《电机与控制学报》 被引量: 0发表: 1990年 有源中点钳位五电平逆变器载波移相调制相电压...
(5L) five-level active neutral-point-clamped converter five-level active NPC converter high-power medium-voltage applications Joining processes neutral point voltage neutral point voltage balance NP voltage optimized SVPWM s...
An algorithm for FC voltage balancing and Neutral Point Potential (NPP) balancing is incorporated in the PWM control. The closed-loop control of the inverter is performed in Synchronous Reference Frame. The stationary frame signals are transformed to synchronously rotating dq reference frame using a ...
The resulting MPC with LS-PWM scheme provides comparative performance to that of a linear controller with LS-PWM. The computational burden can be reduced using the hexagon selection. Experimental results show that the good steady-state performance of the proposed MPC method while retaining the fast...
Vector Decomposition and Model Predictive Control based Hybrid PWM Algorithm for 5L-ANPC InverterVector decompositionmodel predictive controlswitch state sequenceneutral point voltage balancingfloating capacitor voltage balancingThis paper proposes a novel modulation algorithm based on vector decomposition and ...
This paper presents a control strategy for an active neutral-point-clamped five-level (ANPC-5L) inverter using current harmonic minimum pulse-width modulation (CHMPWM) method. This strategy is used to reduce the total current harmonics and limit selected harmonic amplitude with the help of Genetic...