The Development And Investigation Of The Novel Solar Power Generation System

Nowadays, the energy problem has become the most noticeable question in the whole world. With the decreasing of the non-regenerative energy, people begin to pay much more attention on the utilization and development of the regenerative energy. Moreover, as a novel energy source, the solar energy, which has some advantages such as inexhaustibility, non-pollution and so on, has been increasingly noticed.With the decreasing of the manufacturing cost of the solar battery, the solar battery has been widely applied in lots of fields. However, the low conversion efficiency of the solar battery and the instability of working performance of the solar power generation system when it is affected by the working environment limit the wider application of the solar power generation system. The main reason of this case is that the design deficiency of the hardware circuit and software program of the controller of the solar power generation system. In the software design, the control strategy does not consider the influence of environment factors on the output power of the solar power generation system. So it is necessary that the research of control strategy of the maximum power point tracking that is utilized in the solar power generation system.This paper considers the independent solar power generation system as an investigated subject, investigates the advantages and disadvantages of the solar battery controller applied in the existing solar power generation system, analyses the causes of the instability of the solar battery controller, based on the existing solar battery controller, redesigns the software program and hardware circuit of the solar battery controller, investigates the control strategy of the maximum power point tracking applied in the solar battery controller and emulates the control strategy. Moreover, based on the existing solar power generation system, this paper designs a wireless monitor network, and founds a novel solar power generation system.The main context is included:(1) Summarized the solar power generation system and the statement of development and application of the solar power generation system in our country and in the other countries.(2) Described the constitution and function of the novel solar power generation system, and proposed the design scheme and principle of the novel solar power generation system. (3) Analyzed the existent problems of the existing solar battery controller in the solar power generation system. Combined the characteristics of solar battery, and based on the working principle of the DC-DC converter circuit, redesigned the hardware circuit of the solar battery controller. According to the idea of the P&Q (Perturbation and Observation) method among the maximum power point tracking methods, designed the control algorithm of charge and discharge of the solar battery controller.(4) Based on the solar battery control system, designed the wireless monitor network, and according to the design requirement of the wireless monitor network, correspondently designed the monitor controllers:the integrated controller and the node controller.(5) Investigated the charge and discharge control strategies used in the solar battery control system, mainly researched the CVT (Constant Voltage Tracking) method and the maximum power point tracking method, and analyzed the temperature influence on the constant voltage tracking method and the control thought and merits and drawbacks of some the maximum power point tracking methods. Simulated and verified the control strategy of the improved Incremental Conductance method.