Research On Photovoltaic Power Generation System Of Active Reactive Power Scheduling Control Strategy

With the rapid development of photovoltaic industry, in the near future, photovoltaic(pv) grid generation will become the main form of solar photovoltaic utilization.To study the active reactive power scheduling control of photovoltaic power generation have significant research value on photovoltaic power generation and distribution between the traditional power load demand.In this paper, the main research contents are as follows:First of all, the project general photovoltaic cell model is established.Comparative analysis of two kinds of MPPT tracking algorithm, this paper puts forward an improved incremental conductance method, and the feasibility of the proposed algorithm is validated by computer simulation.the pulse width modulation is the core part of the inverter circuit.In this paper, detailed analysis and comparison of several kinds of PWM scheme, it is concluded that the advantages of SVPWM inverter control.Secondly, in order to make the grid current and power grid voltage and frequency, phase and use phase locked loop technique.In this paper, the principle of phase-locked loop are analyzed in detail, compared the SSRF SPLL with DSOGI SPLL the advantages and disadvantages of two kinds of phase-locked loop, puts forward a kind of advanced phase-locked loop technology, and by using the simplex method of phase-locked loop PI controller parameters optimization. It can be seen from the simulation results that lock frequency and phase lock speed obviously were paced up.Again, Photovoltaic(pv) grid module is established.Using engineering setting method for setting the parameters of the double loop control system, and the grid of two-stage type 100 kw photovoltaic inverter parameters of standardized design, through simulating actual working condition, the simulation results show that the grid current harmonic content meet the interconnection standards.Finally, according to the characteristics of pv, battery, photovoltaic energy reactive scheduling control system is established.The control idea of the system are "P + V/f + Q", photovoltaic array is controlled by "P", "V/f " control is used in the main battery, spare battery is controlled by " Q ".Three parts according to coordinate work together to meet the photovoltaic power generation system in grid, an island mode power scheduling requirements.