Planning Methods Of Heat Sources To Improve Wind Power Consumption Considering Thermal Performance Of Heating Pipelines Network

The adjustment pace of Chinese energy structure is accelerating,and the proportion of wind capacity of northeast China in its whole capacity is rising.However,the characteristics of wind energy including high integration,large scale and a long distance of loads have caused the curtailment of wind power.Therefore,how to promote the utilization of wind power is an urgent problem needed to be solved.The combined heat and power(CHP)system meets the need of peak thermal loads in heating seasons,which has caused the stronger coupling characteristic of the heat and power of CHP units and the increase of wind power curtailment.The heat and power of CHP units can be decoupled and the capacity of wind power can increase by using thermal inertia of heating systems.Therefore,the thermal model of district heating pipelines network is firstly given in this paper and applied to analyze the effects of the thermal performance of pipelines on improving peak load regulation capacity of CHP units in different electrical loads and thermal loads.Simulation results demonstrate that the quantity of imbalanced heat caused by the thermal performance of heating pipelines can improve peak load regulation capacity of CHP units and reduce the amount of wind power curtailment.On the basis of analyzing the thermal performance of heating pipelines,planning methods of heat storage tanks for enhancing wind power integration are further studied,and case results show that both the thermal performance of heating pipelines and heat storage tanks can improve peak load regulation capacity of CHP units.However,the effects of heat storage tanks on improving peak load regulation capacity of CHP units are better than the thermal performance of heating pipelines when CHP units peak regulation capacity is sufficient.Furthermore,according to different optimal goals,the capacity of electric boilers in different heating areas is calculated,and then simulation results illustrate that the higher of unit price of electric boilers,the smaller of the utilization of wind power curtailment under overall optimal benefits of the system.Moreover,allocations of combined heat storage tanks and electric boilers are studied and also compared with allocations of electric boilers considering the thermal performance of heating pipelines.In order to increase practicalities of planning methods of heat sources,the simulation platform of planning methods of heat sources is established.The simulation platform can allocate the capacity of heat sources in different heating areas according to the input data and choices of planning goals and can supply the optimal benefits value of the system and the curtailment rate of wind power.According to planning results of heat sources,individual benefit of each main entity is elaborated in terms of the peak regulation ancillary service,and the feasible interval of compensation coefficients is further calculated under the precondition of guaranteeing individual benefit of each main entity when power grid entity received compensation from power plant entities.The simulation platform of benefits allocation methods of each main entity is built in order that each main entity can evaluate its own benefit when the system invests heat sources.Moreover,each main entity can be given its own benefit in terms of the peak regulation ancillary service when compensation bases,pay bases and compensation prices are supplied to the simulation platform.Furthermore,when the financial loss of power grid entity is unreasonable,the feasible interval of compensation coefficients can be given by the simulation platform considering the compensation of power grid entity received from each power plant entity.