Innovation And Practice Of Distributed Photovoltaic Energy Storage

With the increasingly serious environmental problems and shortage of fossil fuels,renewable energy such as distributed photovoltaic power generation will play an important role in people's lives.But photovoltaic power generation itself has randomness and intermittent with the environment change,which makes photo-voltaic power generation microgrid system have the problem of power quality and impact on large power grid,so we need to configure energy storage system to maintain system stability.At present,there are many kinds of energy storage batteries for micro-grid,which all have their own limitations or shortcomings.In this paper,an environmentally friendly energy storage system for lead-acid batteries is established.First of all,this paper introduces the access mode of distributed photovoltaic(PV)in Jianchang County of Huludao,and analyzes the advantages and disadvantages of several grid connected modes and the scope of application.Secondly,based on the APP mobile phone discussion and field measurements that easily lead to full load of photovoltaic inverter tripping and discard problem,based on the full consideration of renewable energy power generation characteristics,find the energy storage device can improve the ability to accept power of renewable energy,but also can improve the economic efficiency of power generation companies,has important practical significance.Then,the simulation of the control of the light storage micro-grid system under different scheduling strategies is carried out.Based on the components of the optical storage micro-grid system,a simulation model of optical storage micro-grid system is built,and the control of the optical storage micro-grid system under two different scheduling strategies is simulated.One is the fixed strategy to enhance the efficiency of distributed photovoltaic energy utilization,the other is the economic dispatch strategy considering peak valley electricity price and photo-voltaic power prediction.Considering the scheduling plan,a cost function is proposed,the objective function can fully guarantee the economy of photo-voltaic power plants,and to maximize the dispatch center for photo-voltaic output fluctuations of the restrictions,the power of photovoltaic power plants as smooth as possible and stable output.Through the optimization of the objective function,the optimal storage capacity is determined,and the energy storage capacity under the different volatility is calculated and compared through an example.Finally,in order to better monitor the implementation of the power station,the station data displayed in more specific form,this paper presents a photovoltaic intelligent monitoring system,the system of real-time monitoring,accurate message push,intelligent alarm,remote control,Mem Cache technology,APP technology,mobile phone automated operation andmaintenance services as a whole,through practice the application of this technology,not only greatly enhance the efficiency of photovoltaic power plants,but also increase the user's income.