Software and Processor-in-the-Loop Execution for a Grid Connected Modular Multi-Level Converter
PROCEEDINGS OF THE 2019 IEEE XXVI INTERNATIONAL CONFERENCE ON ELECTRONICS, ELECTRICAL ENGINEERING AND COMPUTING (INTERCON)
Authors: Galarza, Jose
Abstract
The modular multi-level converter is an emerging technology for high-voltage applications, renewable energy and motor drive. By using the model-based design, the embedded software is designed step by step, main interest are software in-the-loop and processor-in-the-loop approaches. The converter modelling and control have been thoroughly investigated in the literature, a verification of the controllers according with both approaches are presented in this paper. The submodule-level averaged model is used in a 150 MW grid connected converter. Test numerical equivalence is developed in host platform for the software-in-the-loop stage. Processor-in-the-loop stage by behaviour test of the code generated is tested, the simulation is developed in the Texas Instruments F28335 Delfino MCU processor. It is concluded that the presented control strategies in-the-loop simulations are closed to the model simulated in Matlab/Simulink, this verification is a valuable results for the next implementation in real-time simulation.
A P&O MPPT With a Novel Analog Power-Detector for WSNs Applications
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
Authors: Liu, Lianxi; Huang, Chaojin; Mu, Junchao; Cheng, Jiangwei; Zhu, Zhangming
Abstract
This brief presents a perturb and observe (P&O) maximum power point tracking (MPPT) with a novel analog power detector for wireless sensor nodes (WSNs) applications. The proposed analog power detector can judge the output power variation only by the voltage measurements, which eliminates the use of current measurements or microcontroller unit (MCU), so that its complexity and power consumption are greatly reduced. The proposed P&O MPPT circuit with the analog power detector has the advantages of simple structure, low power consumption, and high power efficiency. The proposed MPPT is used in a discontinuous conduction mode (DCM) buck-boost converter with fixed duty cycle to improve the efficiency performance. This design has been implemented in a 0.18 mu m CMOS process occupying an active area of 0.98x0.9mm(2). The input voltage range can be from 2V to 7.2V. The peak conversion efficiency and peak tracking efficiency are 86% and 98% respectively, with power consumption about 9 mu W.
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