Research On Complementary Optimal Dispatching Of Pumped Storage Power Station And Photovoltaic Station

Along with the development of the new energy industry,a large number of distributed power sources are connected to the power system,which has an impact on both the normal operation of the power grid and power quality,and also presents new requirements and challenges for power consumption and storage.Under the background of vigorous development of photovoltaic industry in this region,take advantages of the new energy,make the regional mountain topography,large precipitation,many natural reservoirs and interlaced rivers fully played,do combined operation of the pumped storage power station and photovoltaics station,reduce energy waste,reduce the impact and influence to power network,which is the main purpose of research in this article.Firstly,the design idea of this research is introduced,including the realization of maximum power point tracking function based on Boost DC boost circuit;introduction of three-phase voltage source inverter grid-connected principle;based on DC bus power stabilization and voltage stabilization of the bidirectional Buck-Boost circuit battery and supercapacitor,it analyzes how the Buck-Boost module realizes energy storage and energy release through the bidirectional current conversion circuit under different working modes;introduces the working principle of variable speed pumped storage power station based on full power converter(FSC)circuit and the operation of generator motor in pumping mode and generating mode respectively.Secondly,BP neural network algorithm is adopted to predict the power load of the distribution network,which has small error prediction result and meets the accuracy requirement;the BP neural network is improved by using the big date of a medium-sized photovoltaics station in this region and adopting artificial bee colony(ABC)to predict the generation power.The simulation results show that the improved BP neural network algorithm has good robustness and high accuracy.Then,taking the actual situation of large-scale access of distributed photovoltaic station in this region as the analysis object,this paper studies the impact of independent photovoltaic systems on the voltage quality and transmission losses of the grid after accessing the distribution network,and provides the reference basis of jotnly operation optimal dispatching for the pumped storage photovoltaics station,indirectly indicates the necessity of the combined operation system.Finally,the article specifically introduces the features of regulating voltage and regulating load of pumped storage type photovoltaics system,verifies the advantages of the combined operation system in improving voltage distribution network quality and optimal load distribution.Through taking the power prediction results as the foundation data support,it puts forward the complementary optimal dispatching plan under the circumstances of the pumped storage type photovoltaics system regulating voltage,regulating load and the optimal economic benefit.The result shows that the research technique is feasible,the economic benefit is outstanding,and the effect of effect of peak cutting and valley filling is obvious.Through the above research,it is proved that the combined operation of pumped storage photovoltaics system can reduce the impact on the local area network,flexibly adjust the output of grid-connected power,and can be used as a standby in case of failure or accident,which improves the reliability of power supply of distribution network,realizes the complementary advantages of solar energy and water energy resources and maximizes the value of utilization.