Whole-process steam turbine modeling and identification method for actual characteristics of parameters changing with operating conditions

An identification method and technology for steam turbines, which are applied in design optimization/simulation, special data processing applications, geometric CAD, etc., can solve the problems of no engine turbine model, difficulty in supporting power system stability research, and difficulty in simulating the output characteristics of steam turbine units.

Active Publication Date: 2020-03-10
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +4
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, neither of the above two inventions has a full-process turbine model, which is difficult to simulate the output characteristics of the steam turbine when large signal disturbances occur, and it is difficult to support the next step of power system stability research

Method used

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  • Whole-process steam turbine modeling and identification method for actual characteristics of parameters changing with operating conditions
  • Whole-process steam turbine modeling and identification method for actual characteristics of parameters changing with operating conditions
  • Whole-process steam turbine modeling and identification method for actual characteristics of parameters changing with operating conditions

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Embodiment 1

[0114] The present invention provides a whole-process steam turbine system modeling and identification method that considers the characteristics of key parameters varying with operating conditions. The present invention will be further described below in conjunction with the accompanying drawings, including the following steps:

[0115] Step 1: Use the mechanism analysis method to establish a mathematical model of the whole process steam turbine considering the characteristics of key parameter random group operating conditions. The power model of the cylinder is obtained to obtain a complete steam turbine power output model, and the influence of the change of operating conditions on key parameters is considered in the model, so as to obtain the whole process steam turbine model when key parameters change with operating conditions;

[0116] Step 2: Conduct on-site disturbance tests under typical working conditions, obtain test data on the influence of working condition changes o...

Embodiment 2

[0203] According to a whole-process steam turbine modeling and identification method based on the variable parameter method provided by the present invention, a steam turbine in a power plant is used as the research object for verification. The relevant parameters of exhaust steam condensation type are shown in Table 1.

[0204] Table 1 embodiment steam turbine related parameters

[0205]

[0206] In the table: p 0 is the main steam pressure.

[0207] Establish the whole-process steam turbine model based on the variable parameter method with the method described in the manual; obtain the input and output data of the steam turbine system through field tests; Figure 4 The particle swarm optimization-steam turbine system identification model shown in the figure identifies undetermined parameters and identifies multiple working conditions to obtain the changing trend of key parameters with load. Taking KGV as an example, its changing characteristics with working conditions a...

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Abstract

The invention discloses a method for establishing and identifying a full-process steam turbine model whose parameters vary with working conditions, the core of which includes: 1) using a mechanism analysis method to establish a full-process steam turbine mathematical model considering the changing characteristics of operating conditions of a random group of parameters; 2) A method for obtaining the characteristics of key parameters changing with operating conditions based on the field test method is proposed; 3) A parameter identification method for the steam turbine system model based on the particle swarm optimization-steam turbine system model is proposed. The invention provides a solution to the problem that the steam turbine model is difficult to reflect the active response characteristics of the actual unit under the condition of large disturbance in dynamic simulation of the power system, and can accurately simulate the power output characteristics of the steam turbine under the condition of large disturbance in the dynamic simulation of the whole process of the power system, and improve The accuracy of power system analysis ensures the safe and stable operation of the power grid.

Description

technical field [0001] The invention relates to the technical field of steam turbine modeling, in particular to a whole-process steam turbine modeling and identification method whose actual characteristics vary with working conditions. Background technique [0002] In the context of the continuous development of the power system, which is increasingly interconnected, UHV AC-DC hybrid operation, new energy, and distributed power generation connected to the grid, the scale of the power system continues to expand and the complexity of the system continues to increase. In order to ensure the safe, stable and economical operation of this large hybrid system, it is necessary to carry out simulation tests and research in various stages such as planning, design, construction, operation and maintenance. Power system modeling and simulation can be mainly divided into dynamic simulation and digital simulation. Dynamic simulation is based on physical models, which have the advantages o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F30/17
CPCG06F30/15
Inventor 张广涛李炳楠唐耀华梁正玉吴坡崔杨仲悟之郭为民段松涛朱峰
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
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