A novel control method for input output harmonic elimination of the PWM boost type rectifier under unbalanced operating conditions
A novel control method for input output harmonic elimination of the PWM boost type rectifier under unbalanced operating conditions
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DOI：
10.1109/apec.2000.826136
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发表时间：
2000-02
期刊：
影响因子：
--
通讯作者：
A. Stankovic;T. Lipo
中科院分区：
文献类型：
--
作者：
A. Stankovic;T. Lipo
本文提出了一种新的控制策略，以改善性能的PWM升压型整流器时，工作在不平衡电源。在不平衡的输入电压下的谐波消除的解析解，从而导致一个平滑（恒定）的功率流从交流侧到直流侧，尽管不平衡的电压条件。在分析开环结构的基础上，提出了闭环控制方案。仿真结果表明，该整流控制算法具有良好的响应特性和稳定的运行状态。设计了一个实验室样机，以验证本文所做的讨论和分析。理论和实验结果显示出良好的一致性。消除由于不平衡引起的低次AC和DC侧谐波的可能性预期将实质上影响DC链路电容器和AC侧滤波器的成本。所提出的方法在直流链路处的大二次谐波可能对公共链路上多连接转换器的系统稳定性产生严重影响的应用中特别有用。
This paper presents a new control strategy to improve the performance of the PWM boost type rectifier when operating under an unbalanced supply. An analytical solution for harmonic elimination under unbalanced input voltages is obtained resulting in a smooth (constant) power flow from AC to DC side in spite of the unbalanced voltage condition. Based on the analysis of the open loop configuration, a closed loop control solution is proposed. Simulation results show excellent response and stable operation of the new rectifier control algorithm. A laboratory prototype has been designed to verify the discussions and analyses done in this paper. Theoretical and experimental results show excellent agreement. Elimination of the possibility of low order AC and DC side harmonics due to unbalance is expected to materially affect the cost of DC link capacitor and AC side filter. The proposed method will be particularly useful in applications where the large second harmonic at the DC link may have a severe impact on system stability of multiply connected converters on a common link.