Method for evaluating peak load regulation capacity of heat supply unit afterheat supply transformation through a low-temperature waste heat pump

A heating unit, low-temperature waste heat technology, applied in data processing applications, instruments, resources, etc.

CN111047463AActive 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 heat supply transformation through a low-temperature waste heat pump. The minimum peak regulationoutput and the maximum peak regulation output of the unit in the heat supply state after the low-temperature waste heat pump heat supply transformation are adopted are determined according to the characteristic curve under the minimum steam exhaust amount of the actual operation low-pressure cylinder and the characteristic curve under each heat supply steam extraction flow by integrating the minimum steam exhaust amount of the actual operation low-pressure cylinder and the total heat supply steam extraction flow of the heat supply unit. The method is simple, convenient, accurate and reliable,and important reference data can be provided for a power grid dispatching department to determine the operation modes of the existing heat supply unit adopting the low-temperature waste heat pump forheat supply transformation in different stages of the heating period.
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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 heating reformation by using a low-temperature waste heat heat pump. 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 demonstratio...

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] The invention discloses a method for evaluating the peak-shaving capability of a heating unit after heating reformation by using a low-temperature waste heat pump, which has the following basic characteristics: the following steps are used to determine the peak-shaving output range of the heating unit after the reformation by using a low-temperature waste heat pump .

[0085] (1) System configuration characteristics of the evaluated heating unit and low-temperature waste heat pump heating retrofit technology

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

[0087] ...