Feasibility Study On Operation For Power Peaking Of Cogeneration Units

With the development of social economy, more and more gap of electric power between peak and valley, but pure condensing of thermal power plant can’t meet the demand of power load.while the new energy power generation unit may not participate in electric power load because of its own characteristics in the short term. Therefore, cogeneration units participate in electric power load become serious problems to solve.The constraints and limitations for electric power load of cogeneration unit can be determined and calculated, and we are puts forward how to calculate the minimum heating steam pressure and its meaning of computing. It compared with condensing unit’s varying condition power calculation, preparation the CHP varying condition computer program,and make the analysis of the minimum of main steam parameter corresponding to the minimal heating steam pressure.But in order to reduce the effects of power generation of units and put forward the measure to increase the capacity of the cogeneration power peaking by improving heating mode or technology of variety of heating pattern of joint application. Put forward the series connection heating mode and improved series heating mode, which increase the power of generation and the capacity of the units for power peak. Combined with the existing various heating mode, put it to joint application, and make the reasonable interpretation of the technology of no cold loss and the principle of energy cascade utilization. The paper proposed the concept of equivalent coal consumption method, which can make the thermal economic evaluation for the cogeneration units and has certain guiding function for the electrovalency and heat rates of the cogeneration units. The feasibility and range of cogeneration power peaking can be specific embodied though the computational example of the cogeneration units.