Method for evaluating peak shaving capacity of heat supply unit after high-back-pressure heat supply transformation

A heating unit, high back pressure technology, used in 2D image generation, image data processing, instruments, etc.

CN111047168AActive Publication Date: 2020-04-21STATE GRID HEBEI ELECTRIC POWER RES INST +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-04-21

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Abstract

The invention relates to a method for evaluating the peak shaving capacity of a heat supply unit after high-back-pressure heat supply transformation. Characteristic curves of a steam turbine under different low-pressure cylinder steam exhaust amounts are determined through calculation, low-pressure cylinder steam exhaust flow, comprehensive unit steam exhaust flow and steam extraction flow are determined through calculation according to actual operation parameters of a high-back-pressure heat supply unit under a certain heat supply state, and peak regulation output of the high-back-pressure heat supply unit under the heat supply state is determined through the characteristic curves. The method is used for evaluating the peak regulation output of the high-back-pressure heat supply unit under the conditions of the specific waste heat supply load and the heat supply steam extraction amount, and meanwhile important reference data are provided for a power grid to achieve accurate and reliable dispatching of the reformed heat supply unit.
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Description

technical field

[0001] The invention belongs to the technical field of power generation, and in particular relates to a method for evaluating the peak-shaving capability of a heating unit after high-backpressure heating transformation. Background technique

[0002] The rapid development of new energy units puts forward higher and higher requirements on the peak shaving performance 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 proposed...

Examples

Embodiment Construction

[0083] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0084] A method for evaluating the peak-shaving capability of a heating unit after high-backpressure heating transformation. The following steps are used to determine the peak-shaving output of the high-backpressure heating unit.

[0085] (1) The system configuration characteristics of the evaluated heating units and high back pressure heating retrofit technology.

[0086] 1) The steam turbine of the heating unit is a conventional extraction condensing turbine.

[0087] 2) Heating steam is extracted from steam turbine with lower pressure. The extraction pressure is an adjustable extraction, which is adjusted through the a...