Heat supply unit practical peak load regulation capability evaluation method considering running safety allowance

Abstract

The invention relates to a heat supply unit practical peak load regulation capability evaluation method considering the running safety allowance. The minimum equal steam exhausting flow characteristiccurve, the minimum main steam flow characteristic curve and the maximum main steam flow characteristic curve considering the proper running safety allowance of a practical running low-pressure cylinder are calculated and determined according to heating unit design thermoelectric characteristics and rated heating design work condition parameters; and the peak load regulation minimum output and thepeak load regulation maximum output considering the proper running safety allowance of a heating unit in the heating state are calculated through the determined characteristic curved by synthesizingthe unit practical running heating steam exhaust flow, and therefore the peak load regulation output range of the existing heating unit under specific heating loads is defined. The method can be usedfor evaluating the peak load regulation output range of the heating unit under the specific heating loads, and important reference data are provided for accurate and reliable dispatching of the heating unit for a power grid in the heating period.

Description

technical field [0001] The invention belongs to the technical field of power generation, and in particular relates to an evaluation method for the actual peak-shaving capability of a heating and heating unit considering an operation safety margin. Background technique [0002] The rapid development of new energy units has put forward higher and higher requirements for deep peak regulation of thermal power units. In the thermal power unit, since the heating unit supplies heat and electricity to the outside world at the same time, its thermoelectric coupling characteristics greatly increase the difficulty for the unit to participate in the peak regulation of the power grid. At present, the peak shaving output of many heating units can only be reduced to about 70% during the heating season. [0003] In order to improve the peak shaving range of existing thermal power units, the National Energy Administration has launched a flexibility transformation demonstration project, and ...

AI Technical Summary

Problems solved by technology

However, there is currently a lack of a practical evaluation technique that considers the operating safety margin to evaluate the peak-shaving capacity of existing heating units.

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