Schedulability Of Photovoltaic Power Plants Based On The Energy Storage System

With the vigorous development of photoelectric industry and grid technology gradually mature, grid type optoelectronic installed capacity is also the scale. Light resources itself has intermittent, random, controlled and the characteristics of the volatility, photoelectric output for the outside world of the changed conditions and produce fluctuations change, photovoltaic power station brought the scale between the has become more and more significant, its big, medium-sized photovoltaic power station for grid system frequency of access to become one of the important influence research topic.This paper is based on photovoltaic cells (PV-cell) with the engineering mathematical model (traditional) as the research analysis basis, to facilitate research and analysis of the power supply characteristics of nonlinear light output, its operation and for the purpose of friendly interaction, design the photovoltaic cells characteristic simulation is a visual interface (PV_system-GUI); Consider the outside conditions on the influence of the photoelectric output characteristics, the introduction of compensation factor, puts forward the improved photoelectric model, through with traditional and the test data analysis, the correction of the improved photoelectric model meet the engineering allow relative error of plus or minus6%, to engineering application accuracy index.Compare the advantages and disadvantages of different forms of energy storage, choose for energy storage battery vanadium research object, and put forward the energy storage type (pv) power active power to restrain the fluctuation control method, with large power system simulation software DDRTS for computing platforms, simulation and comparison with energy storage (pv) power into the grid before and after the active power curve, the results show that the output volatility by photoelectric control the effectiveness of the control.Photoelectric access IEEE36node example test system, and the qualitative analysis to system voltage and frequency influence, the energy storage system for the outside world to restrain the photoelectric conditions of the change of the fluctuation caused by power, smooth the photoelectric grid into active output, light store power grid access weakening the influence; Photoelectric access to electricity grid system technical regulations for reference, photoelectric access a regional network in xinjiang, in order to limit grid frequency as constraint conditions, the simulation that the region of the most high power variation of photoelectric limit for the dispatching departments according to the regional big, medium-sized centralized photoelectric access condition, provide different time units of maximum power variation of photoelectric reference value, which can ensure safe, reliable and stable power grid of the operation.