Study on PWM Rectifier Without Grid Voltage Sensor Based on Virtual Flux Delay Compensation Algorithm
Study on PWM Rectifier Without Grid Voltage Sensor Based on Virtual Flux Delay Compensation Algorithm
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DOI：
10.1109/tpel.2018.2815019
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发表时间：
2019
影响因子：
6.7
通讯作者：
Hui Zhang;X. Zhu;Jingcong Shi;L. Tan;Chuanjin Zhang;Kun Hu
中科院分区：
文献类型：
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作者：
Hui Zhang;X. Zhu;Jingcong Shi;L. Tan;Chuanjin Zhang;Kun Hu
面向虚拟磁链电压的控制策略是目前应用广泛的无电网电压传感器控制策略之一。为了解决虚磁通矢量计算中电压矢量积分引起的直流偏置问题，进一步避免稳态误差，基于虚磁通原理，提出了一种带负反馈谐振滤波器的虚磁通观测器，并提出了一种解决虚磁通延时的延迟补偿算法。此外，还给出了不含栅极电压传感器的脉宽调制整流器的控制系统框图。然后，建立仿真系统和实验平台，对整流器进行仿真和测试。最后，通过仿真和实验结果分析，验证了所提算法的正确性和可行性。
At present, virtual flux voltage oriented control strategy is one of the widely used control strategies without grid voltage sensor. To solve the dc bias resulting from voltage vector integration in vector calculation of virtual flux and further avoid the steady-state error, a virtual flux observer with negative feedback resonant filter is presented in this paper based on virtual flux principle and a delay compensation algorithm is also proposed to solve the delay of virtual flux. In addition, the control system diagram of the pulsewidth modulated rectifier without grid voltage sensor is brought forth. Then, simulation system and experimental platform are both established to simulate and test the rectifier. Eventually, the correctness and feasibility of the proposed algorithm are verified through the analysis of simulation and experimental results.