Study On Air Conditioning Load Reduction Potential Considering Urban Micrometeorology

Air-conditioning load accounts for a large proportion of summer load.It has a character of thermal inertia,and changing the operating state in a short time does not affect the user's comfort,which makes it possible to participate in the demand side management as a flexible resource.It can carry out load reduction during the peak load period to ease the power supply shortage.In addition,air-conditioning is a temperature-sensitive load that is greatly affected by meteorological factors such as outdoor temperature and humidity,and the air-conditioning load is mainly concentrated in the urban areas of large cities.Urban micro-meteorology including the heat island effect,temperature and humidity effect,and cumulative effect must also be considered.In this thesis,the reduction potential of air conditioning load considering the influence of micrometeorology is studied.This thesis first takes the weather conditions and load conditions of Nanjing in summer as an example,a method of getting temperature-sensitive load from total load is briefly introduced,and the daily load characteristic analysis is carried out.The relationship between air temperature and air conditioning load is analyzed,and the correlation between daily maximum load and maximum temperature is studied.Also,the influence of meteorological factors on electric load is discussed.Then the relationship between the urban micrometeorology and the air conditioning load,including the heat island effect(HIE),the temperature and humidity effect(THE)and the cumulative effect(CE),is studied.A somatosensory temperature correction method is proposed for HIE and THE.Based on that,a modified genetic algorithm for cumulated temperature considering CE is established.The correlation between a single effect and the air conditioning load is analyzed.After that,combined with three effects,the human body temperature with higher correlation with the power load in Nanjing city is obtained.These will pave the way for studying the potential air conditioning load reduction under the influence of micrometeorology.Finally,on the basis of studying the basic structure and operating characteristics of air conditioning,the characteristics of room temperature change and the control mode of air conditioning system are analyzed.The formula of heat storage energy of air conditioning is derived.Meanwhile the model of air conditioning load reduction is established in the consideration of micrometeorology,and the rationality of the model is verified by simulation.The factors that affect the reduction potential of air conditioning load,including indoor temperature setting value,load reduction duration and pre cooling time ahead of the peak load are analyzed.The table of air conditioning load reduction potential is constructed,which provides a theoretical basis for air conditioning to participate in power grid scheduling.