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Non linear coordination control method for unit power generation unit

A technology of coordinated control and generator sets, applied in the direction of control generators, control systems, control systems, etc., can solve the problem that the operability controller parameter setting method and steps are not given, the research conclusions are not universally applicable, and the capacity of the unit is not provided. minor issues

Inactive Publication Date: 2008-08-13
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

However, there are two problems in this research: first, the paper does not give a clear and operable controller parameter tuning method and steps; second, the research object in this paper is a 160MW fuel oil unit, and this type The unit is rarely used in my country (the unit capacity is small and the fuel cost is high), so the research conclusion does not have universal applicability

Method used

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  • Non linear coordination control method for unit power generation unit
  • Non linear coordination control method for unit power generation unit
  • Non linear coordination control method for unit power generation unit

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Embodiment

[0065] Example: Figure 3 shows a simplified nonlinear model of a 500MW unit unit in a power plant. The rated parameters of the unit are: main steam pressure 16.18Mpa, drum pressure 18.97Mpa, main steam flow 1650t / h, output power 500MW.

[0066] The fuel quantity B% and the opening degree of the main steam regulating valve μ% meet the rate and amplitude limits respectively:

[0067] |dB / dt|≤1.0 / s, 0.0≤B≤100.0 and 0.0≤μ≤100.0.

[0068] Based on the above-mentioned model, apply the method provided by the present invention to design a nonlinear coordinated control system, and the specific implementation steps are as follows:

[0069] 1) Firstly, build the coordinated control system of the unit units according to the form in Figure 3. Among them, the nonlinear inverse control law is connected according to the relationship of formula (9), and the required state variables are measured from the controlled object;

[0070] 2) Then, according to the nonlinear model of the unit unit sh...

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Abstract

The invention belongs to the technique field of device control, in particular to a nonlinear coordination control method of unit system electric generating set. The invention provides a nonlinear coordination control structure for the nonlinear character of controlled object in the unit system set. The structure is composed of inner and outer two circuits: selecting the important process parameter representing nonlinear character, forming the inner circuit through state feedback and relevant reverse operation, composing a virtual linear system; designing a linear feedback control outer circuit for the virtual linear system for guaranteeing the stability and dynamic property of the whole coordination control system. With the method provide in the invention, the engineer can design the nonlinear coordination control system with good load adaptability conveniently for unit system set of various types.

Description

technical field [0001] The invention belongs to the technical field of equipment control, and in particular relates to a nonlinear coordinated control method of a unit system generating set. Background technique [0002] The coordinated operation of boiler-turbine system has always been the focus of theoretical researchers and engineers and technicians since the emergence of unitary generating sets for more than half a century. of. [0003] At present, the coordinated control system has been widely used in various types of unit units, and has become the most core component of the power station production automation system. However, due to the significant differences in the physical structure, working principle and dynamic characteristics of the boiler system and the steam turbine system (the delay, uncertainty and external interference in the production process are mainly concentrated on the boiler side), the unit operates under a wide range of variable conditions. Sometim...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P9/04F22B35/00
Inventor 房方魏乐刘吉臻谭文
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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