On-chip integrated power management MPPT controller utilizing cell-level architecture for PV solar system

Abstract

An on chip integrated power management circuit with maximum power point tracking (PM-MPPT) control is proposed in this paper in order to achieve high efficiency Photovoltaic (PV) system. The proposed PM-MMPT circuit mitigates partial shading issues which exist in PV systems by utilizing cell-level distributed MPPT architecture, where each cell has its own MPPT circuit, in order for each cell to produce its own maximum power without affecting other cells or being affected by other cells. The proposed PM-MPPT circuit consists of two different parts. The first part is a high-efficiency synchronous power converter stage. The second part is an analog ripple correlation control (RCC) MPPT control circuit which provides faster and efficient MPP tracking, has less circuit complexity and low power consumption. HSPICE simulation model of the proposed PM-MPPT circuit is developed with a solar cell that has 0.5 V open circuit voltage and 6 A short circuit current. Simulation results show that the proposed PM-MPPT circuit rapidly tracks the MPP with a tracking efficiency larger than 99% over a wide range of irradiation levels and 92% system power conversion efficiency at a 2 W power level. The detailed analog design of the power stage and the RCC MPPT circuits are presented and discussed in the paper based on 0.35µm CMOS technology. In addition, the PM-MMPT IC layout is presented and discussed. To validate the proposed technique and design, a comparison between the results of the proposed circuit and other reported techniques from the literature is provided. It is shown that the proposed circuit and system are able to operate with the lowest input voltage and the highest output power compared with other reported techniques. Moreover, the proposed design has the smallest size under 2 W power level.

Perovskite Photovoltaics for Dim‐Light Applications

“…Because in normal operation, the intensity of indoor illumination may vary more than one order of the magnitude, if the maximum power points (MPPs) deviate largely with the intensity of the illumination, complicated MPP tracking (MPPT) circuits are needed to ensure that the device provides the highest power to external circuitry . Nevertheless, if the MPPs or, more specifically, the operational voltages of the MPPs remain constant regardless of the incident light intensity, a much simpler MPPT circuit can be used, and the operational point can be defined by selecting the resistance value of a single resistor .…”

Classification of Three-Phase Grid-Tied Microinverters in Photovoltaic Applications

“…Therefore, during the last three decades, PV architectures experienced different phases of progress from centralized architecture moving to string architecture and module architecture to contribute more power conversion efficiency, leading to better stability and reliability [23]. Even with other applications than electricity harvesting, the PV architectures moved to PV sub-modules [24,25] and PV cells [26][27][28]. The reduction of PV modules for each inverter diminishes the mismatch losses from one side and increases system modularity and plug-and-play operation for PV architecture expansion or even for periodic maintenance on the other side [18].…”

Improved Performance of a Photovoltaic Panel by MPPT Algorithms

“…The resulting point of exploitation is then sometimes very far from the real MPP. In other words, it becomes difficult under these conditions to extract the maximum output power of PV panel in all weather conditions [5]. In order to extract at all times the maximum power available at the GPV terminals and transfer it to the load, an MPPT strategy is necessary in order to pursue the maximum power point of the PV panel [6].…”