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Method for determining optimal daily plan of heat accumulation configured thermoelectricity unit under time-of-use electricity price

A technology of thermoelectric unit and determination method, which is applied in the directions of calculation, instrumentation, data processing, etc., and can solve problems such as difficulty in applying extraction steam thermoelectric unit.

Inactive Publication Date: 2015-04-08
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, under the time-of-use electricity price system, the existing dispatching decision-making models are difficult to apply to the steam extraction thermal power unit equipped with heat storage tanks.

Method used

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  • Method for determining optimal daily plan of heat accumulation configured thermoelectricity unit under time-of-use electricity price
  • Method for determining optimal daily plan of heat accumulation configured thermoelectricity unit under time-of-use electricity price
  • Method for determining optimal daily plan of heat accumulation configured thermoelectricity unit under time-of-use electricity price

Examples

Experimental program
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Embodiment Construction

[0049] This example demonstrates how to use the method of the present invention to determine the optimal operation plan for the next day for a 300MW steam extraction heat supply unit. Technical parameters of the unit under TMCR working condition: P max e = 323 MW , P min e = 150 MW , P max h = 357 MW , c v1 =0.23, c v2 =0,c m =0.45, K=81, P up =P down = 80MW / h; the cost function coefficients are: a = 0.05313, b = 189, c = 0.0245, d = 0.0028, f = 43.47, g = 13174; set the thermal load power borne by the unit on the next day for each period Same, 280MW. The unit is equipped with a heat storage tank with a heat storage capacity of 800MWh, and the maximum charge and discharge power of the heat storage tank is...

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Abstract

The invention discloses a method for determining an optimal daily plan of a heat accumulation configured thermoelectricity unit under time-of-use electricity price. The method comprises a decision model used for determining the optimal daily operation plan of a steam extraction type thermoelectricity unit which is provided with a thermal storage tank under the time-of-use electricity price. The model takes set next-day time-of-use electricity price, the electrothermic characteristic parameters of the steam extraction type thermoelectricity unit and the thermal characteristic parameters of the thermal storage tank as input, takes the next-day electricity selling profit maximization of the thermoelectricity unit as a target, considers the electricity constraint and the thermal constraint of a steam turbine and a coupling relationship between the electricity constraint and the thermal constraint, and can obtain an optimal steam turbine steam extraction power plan, an optimal power generation power plan and an optimal heat charging and discharging power plan of the thermal storage tank in each next-day time period.

Description

technical field [0001] The invention relates to a method for determining an operation plan of a generating set, in particular to a method for determining an optimal daily plan of a thermoelectric set configured with heat storage under a time-of-use electricity price. Background technique [0002] At present, my country's power grid is under great pressure for peak regulation, and the operation mode of "heating to determine electricity" of heating units is one of the main reasons for the difficulty in peak regulation. The existing large-scale steam extraction thermal power unit is equipped with a heat storage tank, which can effectively decouple the operation constraint of "heating to determine power", improve the flexibility of the unit's peak-shaving operation of power generation, and relieve the peak-shaving pressure of the system. [0003] When the power system is scheduled to run, it is necessary to determine the operation plan of the thermal power unit for the next day ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q50/06
CPCG06Q50/06Y04S10/50
Inventor 朱全胜吕泉赵华刘巍崔宁宁李纯
Owner STATE GRID CORP OF CHINA