An Economic Optimal Dispatch Method for Combined Heat and Power Units

Abstract

The invention discloses a method for economically and optimally dispatching cogeneration units. The method includes S1, determining safe and adjustable peak-load regulation ranges of the cogeneration units; S2, constructing mathematical model for unit load optimization under the consideration of electric load adjustment moments and creating multi-objective and multi-constraint unit load optimization objective functions; S3, designing a cogeneration unit multi-objective and multi-constraint load optimal dispatching scheme on the basis of a non-dominated sorting genetic algorithm (NSGA-II). The multi-objective and multi-constraint method for optimally dispatching the cogeneration units has the advantages that power generation load and heating load among the various units of an integral plant can be reasonably distributed in real time on the premise that safe, economical and environment-friendly running of the units is guaranteed, standard total coal consumption and pollutant emission of the integral plant are reduced to the greatest extent, power grid load adjustment can be quickly responded, the load competitiveness of each unit is improved, the integral plant can run at a low comprehensive economical cost, and the overall efficiency of the units is improved.

Description

technical field [0001] The invention relates to an economic optimization dispatching method of a cogeneration unit, in particular to a multi-objective and multi-constraint economic optimization dispatching method for a cogeneration unit. Background technique [0002] As the proportion of combined heat and power units in the power grid continues to rise, it is an inevitable trend for units to participate in peak regulation. The market-oriented reform of the separation of power plants and power grids makes the combined heat and power units not only complete the peak-shaving task of the power grid, but also take into account the requirements of the unit itself to reduce the overall economic cost and environmental protection operation, optimize load distribution, and achieve the specified heat-to-power ratio, so as to improve the overall efficiency. This involves the multi-objective and multi-constraint optimization problem when cogeneration units participate in peak regulation....

AI Technical Summary

Problems solved by technology

[0004] The current domestic research on cogeneration load optimization and distribution focuses more on the improvement of optimization algorithms based on coal consumption characteristic curves or steam consumption curves. With the current development of my country's electricity market situation, no new content has been given to the mathematical model of cogeneration load optimization distribution. Requirements such as load adjustment time and environmental protection requirements are taken into account, which to a certain extent limits the further development of cogeneration load optimization and is not conducive to the practical application of load optimization theory research.

Images