Research On Gas-power Complementary Resources Dispatching And Cooperative Planning Under The Energy Internet

Energy Internet is a comprehensive energy network with the power network as the core,including natural gas network,oil network and other energy networks.In the energy Internet environment,various independent energy networks in the traditional mode,such as power network and natural gas network,will be interconnected,and there will be two-way flow of energy,which can ultimately realize the complementarity and intermodulation of resources.Based on the above background and the characteristics of the power network and natural gas network,this thesis explores and studies the mechanism and model of the energy internet in the cross-grid demand response of the power network and the natural gas network,and explores the collaborative dispatch planning method of the gas and power dual network,mainly including the following aspects:（1）This thesis researches the cross-grid demand response mechanism of gas network surplus resources participating in power dispatch or power market transaction.Based on the research objectives,this thesis proposes a cooperative operation framework that utilizes the surplus resources of the gas network to support the balance of supply and demand in the power network across the grid.In this framework,gas turbines are used as the conversion points for converting the surplus resources of the gas network into equivalent surplus power generation capacity to participate in the operation of the power network,and all the surplus natural gas resources in the region are converted through this conversion point.In addition,a cost model for cross-grid support of surplus resources in the gas network is established to obtain the “costequivalent surplus power generation capacity” curve of the surplus resources to participate in the competition in the power market.At the same time,the winning equivalent surplus power generation capacity of this surplus resource in the power market will also be allocated to each gas network surplus resource supplier participating in the process according to the principle of the lowest cost.Finally,the feasibility of the proposed framework and model is verified by relevant cases.（2）This thesis researches the cross-grid demand response mechanism of power network surplus resources participating in gas dispatch or natural gas market transaction.Based on the research objectives,this thesis proposes a cooperative operation framework that utilizes the surplus resources of the power network to support the balance of supply and demand in the gas network across the grid.In this framework,gas turbines are also used as the conversion points for converting the surplus resources of the power network into equivalent surplus natural gas to participate in the operation of the gas network,and all the surplus power resources in the region are converted through this conversion point.This thesis uses the surplus resources of the power network to replace part of the output of the gas turbine at the conversion point,so that the gas turbine saves some natural gas,and completes the conversion of electricity to gas.In addition,a cost model for cross-grid support of surplus resources in the power network is established to obtain the “cost-equivalent surplus natural gas” curve of the surplus resources to participate in the competition in the natural gas market.At the same time,the winning equivalent surplus natural gas of this surplus resource in the natural gas market will also be allocated to each power network surplus resource supplier participating in the process according to the principle of the lowest cost.Finally,the feasibility of the proposed framework and model is verified by relevant cases.（3）Based on the operation characteristics of the power network and the natural gas network,this is thesis reasearches the "gas-power" cooperative dispatch planning method.This part of the research content proposes a collaborative scheduling and planning method for gas and power dual networks.The method combines operation dispatchingwith planning and construction,and constructs a gas network-side and power network-side integrated planning model with the objective function of minimizing the sum of operation cost and construction cost.The validity of the proposed model is verified by a case composed of a 9-node power system and a 6-node natural gas system.