A comprehensive evaluation method for the flexibility of combined heat and power units.

Abstract

This invention relates to the field of performance evaluation technology for combined heat and power (CHP) units, and in particular to a comprehensive evaluation method for the flexibility of CHP units. The method includes acquiring design data and heating season operation data of the CHP unit; preprocessing the data to remove obviously erroneous operating points, and performing steady-state identification using the unit's operating parameters as boundaries to obtain the unit's stable operating point; plotting the feasible region of the unit's heat and power load based on the steady-state data; calculating the area of ​​the feasible region using the definite integral method, and calculating the flexibility of the CHP unit under the given heating scheme according to the definition of flexibility; this invention uses dimensionless indicators, achieving a quantitative representation of the heating and peak-shaving flexibility performance of the CHP unit; its advantage over existing technologies is that it is not limited by unit model or heating scheme, and can be used to compare the heating and peak-shaving flexibility of CHP units under different heating schemes, with more accurate output indicators.

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