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This paper presents incremental conductance (IncCond) MPPT using direct control method in which duty cycle is adjusted inside the algorithm thus need for use another control loop is eliminated while tracking is done perfectly. The steady state oscillations are reduced and dynamic performance is improved. Design and theoretical study and analysis of the proposed system are provided and its feasibility...
Aimed at the shortcomings that traditional fuzzy logic control method for solar LED illumination system maximum power point tracking (MPPT) control system, a novel solar LED illumination control strategy based on variable univers adaptive fuzzy PID controller is proposed.The controller can automatically adjusts the variable univers with the change of photovoltaic output power deviation, to realize...
Photovoltaic (PV) arrays are always assembled based on centralized, string and multi-string technology. These complex configurations of PV arrays and non-dependent maximum power point tracking (MPPT) algorithms based on PV arrays but not PV modules lead to the low output power efficiency of PV arrays. In view of the above questions, this paper analyzes the output characteristics of PV arrays under...
While most of the current maximum power point tracking (MPPT) algorithms for large photovoltaic systems are complicated and inefficient, this paper proposes a novel method of MPPT specially used in small-scale photovoltaic LED lighting systems. The proposed algorithm is based on the improved research on the characteristics of the PV array in novel lighting systems. The proposed method in the special...
The output power of photovoltaic (PV) power generation system is the nonlinear function of insolation, temperature and load, and thus the perturbation step of perturbation and observation (P&O) method should be regulated according to PV module working condition to improve the MPPT effect. P&O with fuzzy control, which can implement variable perturb step control, has good control effect, however...
A novel MPPT method, which adjusts the perturbation step according to the work point of photovoltaic (PV) module, is proposed to reduce the power oscillation around MPP. There is the nonlinear relation between the output power of photovoltaic module with temperature and load. The perturbation step is constant in traditional perturbation and observation (P&O) MPPT method. There is serious power...
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