Siting And Sizing Of CHP Unit In Integrated Energy System

At present,China is vigorously developing clean and efficient energy technologies.The establishment of an energy internet is an important strategic direction for China's current energy development.The integrated energy system is a typical energy supply system for the energy internet and is an economical and efficient way of energy utilization.As an important energy conversion link in the integrated energy system,the distributed cogeneration system plays an important role in the integrated energy system.Photovoltaic power generation is an important form of clean energy power supply.Large-scale photovoltaic power generation access will change the distribution of power flows in the original power network,which will affect the optimal operation of the system.In the integrated energy system,there is a close relationship between various energy forms.Large-scale photovoltaic access not only affects the power network,but also affects the thermal network and the natural gas network.This paper is based on the links between energy systems and uses an online-offline joint load forecasting method to analyze the impact of large-scale access of distributed photovoltaics on integrated energy systems,and from the perspective of economic operations,to large-scale distributed photovoltaics.The problem of constant volume location in the cogeneration system under the access area was studied.The specific work is as follows:First,this article briefly introduces the integrated energy system,establishes a simple model of an integrated energy system,and discusses smart energy management models such as Internet + Wisdom Energy,smart home,and smart office.It also introduced the three aspects of the global energy Internet,the comprehensive benefits of the global energy Internet,and the strong smart grid.To build a concept of extensive interconnection of energy and close contact with each other,laying the foundation for the follow-up of the impact of large-scale distributed photovoltaic access on various energy sources.Then,in-depth studies were conducted on the prediction of power load and photovoltaic power generation.Using the improved support vector machine method and online-offline joint load forecasting method,the simulation model was used to verify the scientific rationality of the proposed method.In addition,through the scientific analysis of the integrated energy system,taking into account the thermal load,electric load,gas load,randomness of photovoltaic power generation and the interaction between them,the establishment of a large-scale distributed photovoltaic access cogeneration system in the integrated energy system In the medium-sized optimization model for site selection,the impact of large-scale PV access on other energy forms is briefly discussed.The optimization model aims to reduce the network loss of the power grid.Consider the power system,heating network and natural gas in the energy system.The operational constraints of the network lead to a more scientific approach to energy loss reduction in the future.Finally,assuming large-scale PV grid access,based on the analysis of energy flow(current)in the system,an optimization algorithm combining genetic algorithm and bacterial foraging algorithm(GA-BFO)is used to balance the large-scale PV access.The goal of volatility and reduction of network loss is to perform constant volume location of CHP in a typical urban model.The results show that large-scale PV access can effectively reduce fossil energy consumption,and the constant volumeof CHP can be selected.The address can reduce the network loss,and using GA-BFO has better performance than either one alone..