On-line operation optimization method of seawater once-through cooling circulating water system for thermal power units
A technology for circulating water systems and thermal power units, applied in cooling fluid circulation devices, mechanical equipment, engine components, etc., can solve the problems of units not in optimal operating state and frequently changing operating states, so as to improve safety and avoid potential safety hazards. Effect
Inactive Publication Date: 2018-09-07
FUJIAN DATANG INT NINGDE POWER GENERATION
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is to aim at the lowest coal consumption, and to use safe operation as a constraint condition. The online optimization of the circulating water system operation mode is lagging behind, which leads to the problem that the unit is not in the optimal operation state and frequently changes the operation state.
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[0025] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0026] Such as figure 1 As shown, the method for online operation optimization of the thermal power unit seawater direct-flow cooling circulating water system provided by the present invention comprises the following steps:
[0027] Step 100, taking the impact on the operation safety of thermal power units as the constraint condition, and taking the lowest coal consumption as the optimization goal, establishing the first mathematical model of the impact of tide level and temperature changes on the operating characteristic parameters of the circulating water system, and further improving the safety of the circulating water system operation optimization sex and accuracy.
[0028] The method of establishing the first mathematical model of the impact of tide level and temperature changes on the operating characteristic parameters of the circulat...
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The invention discloses an online operation optimization method for a seawater direct cooling circulation water system of a thermal power generating unit. The online operation optimization method comprises the following steps that a first mathematic model of the influence of the sea level and temperature change on operating characteristic parameters of the circulation water system is established; according to the first mathematic model and a load dispatching prediction curve, the coal consumption of a unit plant under different operation modes of the circulation water system in a period of time in the future is calculated, and optimization analysis results of the different operation modes of the circulation water system are obtained; and the consumption differentials between all the optimization analysis results are compared and analyzed, the optimal operation mode of the circulation water system in a period of time in the future is selected with the situation that operation safety of the thermal power generating unit is influenced as the constraint condition and with the minimum coal consumption as the optimization objective, and the circulation water system is guided to operate economically online. According to the online operation optimization method, the optimal operation mode in a period of time in the future is provided, and the potential safety hazards caused by frequent changes of the optimal operation mode of the circulation water system are avoided while the effect that the circulation water system is in the optimal operation state is ensured.
Description
technical field [0001] The invention relates to an energy-saving technology for seawater cooling thermal power units, in particular to a method for optimizing online operation of a seawater direct current cooling circulating water system for thermal power units. Background technique [0002] In my country's coastal areas, the industry is developing rapidly. In response to the increasing demand for electric power, a number of thermal power plants and nuclear power plants have been established. Due to the limited fresh water resources in the coastal areas, the circulation cooling system mostly uses seawater DC circulation cooling system. [0003] Although the seawater direct circulation cooling system solves the problem of shortage of coastal fresh water resources, and has the advantages of low water intake temperature and good cooling effect, the seawater direct circulation cooling water system is affected by many natural factors, such as tides and seawater temperature. It is...
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IPC IPC(8): F25D1/02F25D17/02F01D25/12
CPCF01D25/12F25D1/02F25D17/02
Inventor 徐敬林文斌方向明刘勇
Owner FUJIAN DATANG INT NINGDE POWER GENERATION