Discrete Dynamical Predictive Control on Current Vector for Three-Phase PWM Rectifier
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ORIGINAL ARTICLE
Discrete Dynamical Predictive Control on Current Vector for Three‑Phase PWM Rectifier Kai Jing1,2 · Chang Liu1,3 · Xiaping Lin3 Received: 5 December 2019 / Revised: 20 July 2020 / Accepted: 17 September 2020 © The Korean Institute of Electrical Engineers 2020
Abstract In order to improve the current performance of AC side for a three-phase PWM rectifier, this paper puts forward a current vector predictive control strategy. The discrete dynamic response of the current vector during the control period has been deduced through the discrete solving of Taylor series expansion and finite order truncation, so that the prediction of the current vector is achieved and testified by the relative distance. Then the discrete dynamical prediction control strategy of the current vector is proposed with the timings analysis to improve the rapidity and accuracy of the current vector tracking. Simulations and experiments are given to testify and verify the dynamic/steady-state performance and the efficiency of the control strategy, which can effectively improve the current vector tracking performance and reduce the harmonics and ripples. Keywords Three-phase PWM rectifier · Current vector control · Discrete dynamic response · Predictive control
1 Introduction Three-phase PWM rectifiers are widely used in industrial applications such as distributed energy, uninterruptible power supply (UPS), active power filters (APF), regenerative motor drive and microgrid [1–3]. Compared with the traditional diode rectifier, three-phase PWM rectifier can achieve sinusoidal AC current, high power factor, adjustable DC voltage and bidirectional energy flow, which can reduce the harmonic pollution in AC side. To achieve these advantages, some efficient control strategies are attached more attention. The typical control strategies of three-phase PWM rectifier are very similar to methods for AC motor driving by * Kai Jing [email protected] Chang Liu [email protected] Xiaping Lin [email protected] 1
Department of New Energy Science and Engineering, Hebei University of Technology, Tianjin, China
2
Hebei Control Engineering Technology Research Center, Tianjin, China
3
School of Artificial Intelligence, Hebei University of Technology, Tianjin, China
inverter, which can divide into two types that one is based on the space vector orientation and the other is direct power control (DPC) [4, 5]. For the two types of the control strategies, the former always includes voltage oriented control (VOC) [6–11] and virtual flux oriented control (VFOC) [12–15], which controls the current vector to track the voltage vector by the two components in the synchronous rotating frames based on grid voltage and virtual flux respectively. The strategies have good steady state performance, but the dynamic performance is affected by the tuning work of internal current controllers, which has been continuously studied in recent years [10, 11, 13]. Moreover, VFOC are also used in sensorless control [14, 15]. DPC, the latter that mentioned above,
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