1. Control and Monitor of Single-Stage Single-Phase T-type Grid-connected Inverter based on IoT
- Author
-
Truong Phuoc Hoa, Nguyen Duc Hung, Nguyen Dinh Tuyen, and Le Quang Huy
- Subjects
Universal asynchronous receiver/transmitter ,Computer science ,Control theory ,Harmonic ,Electronic engineering ,Inverter ,Topology (electrical circuits) ,Grid ,Maximum power point tracking ,Voltage - Abstract
This paper proposes a control and monitor of single-stage single-phase T-type grid-connected inverter based on IoT. The MPPT (maximum power point tracking) algorithm, modulation method of single-phase T-type, the PR (proportional-resonant) current controller, and SOGI PLL algorithm are presented in this paper. With H-bridge, the level of inverter voltage is 3, the low level is the cause of the appearance of harmonic components and power loss in the grid- connected solar application. To overcome this problem, this paper adopts a T-type single-phase with 5 voltage levels. The presented inverter has a half-bridge switching leg and a T-type switching leg. Besides, the grid-connected energy can be easily supervised during DSP processing via the ESP32 wi-fi module by the UART interface. A prototype and mobile app are built for performance verification, which can test single-phase T-type topology. Simulation and experimental results are presented to verify the effectiveness of the proposed strategy.
- Published
- 2021