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In recent years, photovoltaic power generation has been more and more popular, because it has many advantages, clean energy and widely distributed. However, in the development process photovoltaic power generation also encountered a lot of obstacles, such as tracking the global maximum power point (GMPPT). Due to the photovoltaic system will be blocked by the photovoltaic panels appear multiple peaks,...
Differential power processing (DPP) has demonstrated its significant advantage of high system efficiency for photovoltaic (PV) applications especially in mismatch conditions. In this paper, a sub-module DPP based PV optimizer using a self-adjusted time-sharing maximum power point tracking (MPPT) control strategy is proposed, which can achieve fast and accurate tracking of all sub-modules' maximum...
This paper presents an improved Simulated Annealing (SA) based Maximum Power Point Tracking (MPPT) technique designed for photovoltaic (PV) systems under partial shading conditions (PSC). Compared with existing SA MPPT algorithms, the proposed method performs faster convergence speed, higher tracking accuracy and continuously tracking of the global Maximum Power Point (GMPP) under climate changes...
Frequency stability problem in microgrid attracts much attention with increasing penetration of the intermittent and fluctuating renewable energy. Conventional microgrid control strategy in steady state can balance power difference between sources and loads by storages or robust power grids, and hence grid frequency is maintained stable. However, due to lack of inertia in power electronic converters,...
At present, the grid connection of most Large-Scale Photovoltaic Power Systems is AC grid, which has some obvious disadvantages. Firstly, a large number of low-voltage DC-AC inverters are used to connect Solar panels with the grid, which lead to high cost and switching loss. Secondly, the line loss inside the system is huge, since the low AC voltage of the grid lead to the high current. In this paper...
This paper presents a power management strategy of a hybrid microgrid, which is composed of a Photovoltaic (PV) system, a Lithium-ion (Li) battery system and a Supercapacitor (SC) system. The microgrid energy is mainly generated by the Photovoltaic system, which normally uses a maximum power point tracking (MPPT) technique to continuously deliver the highest power. However, the variations in irradiation...
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