Research On Method Of Combined Heat And Power Planning To Facilitate The Wind Power Integration

Our country has promoted the development of new renewable clean energy.As an excellent representative of clean energy,installed wind capacity is growing year by year.Following wind power curtailment is more and more serious,especially in wind-rich northern China.Wind power curtailment has been an obstacle to the deployment of wind power generation.In winter of northern China,the main reason of wind power curtailment is that cogeneration unit has to improve its minimum output for meeting the heat load,which causes the lack of space for wind power integration.Based on the thought that combined heat and power(CHP)units can enhance the ability of peaking load regulation by coupled to heat sources,a new method of combined heat and power planning to facilitate the wind power integration was proposed for solving this problem.Heat sources which can be used in the planning were chose from many and varied forms of heat sources.The principles of operation,performance characteristic,technological and economic indicators were analyzed.In term of the characteristics of these heat sources,several feasible methods which combined heat source and power source were confirmed to facilitate the wind power integration,such as combined heat and power units coupled to electric boilers,coupled to electric heat pumps,coupled to heat storage and coupled to heat accumulation electric heating.The operation mechanisms of those feasible methods were introduced as well.Considering the investment income and operating costs of these heat source,the models of combined heat and power planning were built,which include both investment decision of heat source and production simulation.The part of investment decision mainly considers the cost and benefit of the heat source,and the part of production simulation simulates the operation process of the heat source and the unit.Through production simulation,the adaptability of heat source schemes in different thermal loads and wind power scenarios were analyzed.Comprehensive optimization which combined the operating costs from production simulation with investment decision was performed to get the optimal capacity of heat sources of those feasible methods in specific condition.Performance indicators for various heat source configurations were compared to found the optimal configurations.And then the impact of generator parameters and the location on the capacity of the heat source were assessed.Based on the heat source configuration scheme,the operating pattern and policy mechanism were analyzed to promote the steady development of the operation of combined heat and power.Based on peak-regulation ancillary service compensation and trade mechanism,return model of the market subject were established respectively from the aspects of thermal power plant investment heat source and wind power plant investment heat source.The profits of every market subject were analyzed in terms of current peak-regulation ancillary service compensation mechanism.The profit interval of each market subject were found through the marginal compensation price curve to evaluate the distribution rationality of the current compensation mechanism.A common profit compensation price range can be found by the adjustment and improvement of peak compensation base to make the solutions steady within the area.Economic benefits of the market players is calculated within the common profit compensation price area to compare the profits of every market subject and offers advice to investor.