The Co-Optimization Method Of Power-Load-Storage Considereing Hydrogen Production From Large-Scale Offshore Wind

With the increasing energy shortage and environmental pollution,accelerating the development and utilization of renewable energy has become the primary task of energy system transformation in the whole world.In recent years,the focus of global wind power development has gradually shifted from onshore to offshore,and the installed offshore wind power capacity has been increasing.However,the development of large-scale offshore wind power will bring transmission and consumption problems,and the uncertainty will also affect the reliability and economy of the power system.Using electrolytic hydrogen can effectively solve the problems of renewable energy consumption and grid stability.This paper carries out the following research from the perspectives of evaluation of offshore wind power resources,the optimization method of wind power capacity considering wind power hydrogen production,and optimization of power-load-storage based on temporal production simulation:(1)An assessment of the potential of offshore wind power output is proposed.The installation conditions of wind turbines in the sea area are analyzed,and the coastline is defined based on the watershed algorithm and satellite map.The installation areas of offshore wind power meeting the requirements of sea level height,Marine protected areas,and shipping channels are screened by the Arc GIS platform.Based on the input and output characteristics of wind turbines,the concept of Capacity factor(CFs)was introduced to establish the offshore wind power resource potential assessment model to evaluate the potential of the total annual output of China’s offshore wind power in the sea areas where wind turbines can be installed.(2)Wind power capacity optimization method considering offshore wind power hydrogen production is proposed.Combined with existing international hydrogen Energy assessment methods,an assessment model of hydrogen demand is established.Aiming to minimize the total investment cost of offshore wind power and total investment cost of hydrogen production,an optimization model of wind power installed capacity is established,considering hydrogen production from offshore wind power.The establishment of the objective function is based on LCOE and LCOH.The carbon emission coefficient of each traditional energy is analyzed.The evaluation model is established to evaluate the benefit of carbon reduction caused by replacing conventional energy with hydrogen in power generation,heating,industry,and transportation.Taking the coastal provinces of China as an example,the economic benefits and low-carbon benefits of this method are analyzed.(3)An optimization method of power-load-storage based on temporal production simulation is proposed.On the power supply side,considering the temporal characteristics of the power unit,the temporal model of the conventional generator set is established.On the energy storage side,according to the characteristics and principles of the energy storage equipment,the time series charge-discharge model is established.On the demand side,the factors of different controllable loads and subsidy methods are considered to determine the proportion of participation in demand response.Optimal efficiency is the goal to establish the temporal production simulation model considering hydrogen production from offshore wind.Based on the calculation results of the optimal wind power installed capacity in Jiangsu province in 2050,the effectiveness of the optimization scheme is verified in terms of new energy consumption capacity,operation reliability,economy,and pollutant emission of the power system.