Thermal power generating unit DEH rotating speed control method based on improved PSO-fuzzy PID

A thermal power unit, speed control technology, applied in electric controllers, controllers with specific characteristics, etc., can solve problems such as errors in parameter adjustment, and achieve the effects of fast response time, fast convergence, and good system robustness.

Pending Publication Date: 2022-03-11
NANJING INST OF TECH
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Problems solved by technology

The fuzzy PID algorithm requires experts to give fuzzy rules, and there are errors in the parameter adjustment process

Method used

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  • Thermal power generating unit DEH rotating speed control method based on improved PSO-fuzzy PID
  • Thermal power generating unit DEH rotating speed control method based on improved PSO-fuzzy PID
  • Thermal power generating unit DEH rotating speed control method based on improved PSO-fuzzy PID

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Embodiment Construction

[0043] A method for controlling the DEH speed of a thermal power unit based on the improved PSO-fuzzy PID of the present invention will be further described and explained below in conjunction with the drawings and embodiments. Among them, DEH: Digital Electronic Hydraulic, refers to digital electro-hydraulic regulation system.

[0044] as attached figure 1 As shown, a thermal power unit DEH speed control method based on improved PSO-fuzzy PID includes the following steps:

[0045] S1. Construction of thermal power unit DEH system: build a thermal power unit DEH system mainly composed of electro-hydraulic converter, steam turbine, oil motor, transmission mechanism, steam volume, and reheating volume; the mathematical model of thermal power unit DEH system is:

[0046]

[0047]

[0048]

[0049]

[0050] Among them, G 1 (S), G 2 (S), G 3 (S), G 4 (S) are the transfer function models of electro-hydraulic converter, oil motor, steam volume and reheat volume respec...

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Abstract

The invention discloses a thermal power generating unit DEH rotating speed control method based on improved PSO-fuzzy PID. The method comprises the steps that a thermal power generating unit DEH system is constructed; establishing a fuzzy PID control module; an improved PSO algorithm is introduced to optimize a fuzzy PID control module, in the fuzzy PID control module, the improved PSO algorithm is adopted to optimize a scaling factor and a quantization factor in the fuzzy PID control module, an optimal value is sent to the fuzzy PID control module, the improved PSO algorithm takes an error signal of the DEH system of the thermal power generating unit as a fitness function, and the fitness function of the DEH system of the thermal power generating unit is calculated. Setting an inertia weight of power exponent attenuation; and the improved PSO-fuzzy PID control module is applied to the DEH system of the thermal power generating unit to form closed-loop feedback, so that the rotating speed control of the DEH system of the thermal power generating unit is realized. In the improved PSO algorithm, the error signal of the DEH system of the thermal power generating unit is used as a fitness function, the inertia weight of power exponent attenuation is set, and the method has the advantages of fast convergence, good stability of system control, fast response time, good system robustness and the like.

Description

technical field [0001] The invention relates to the technical field of thermal power unit control, in particular to a thermal power unit DEH speed control method based on improved PSO-fuzzy PID. Background technique [0002] The steam turbine plays an important role in the power generation process of the thermal power unit. It is a rotary steam power device. The high-temperature and high-pressure steam passes through the fixed nozzle and becomes an accelerated airflow and then sprays on the blades. The rotor equipped with blade rows is subjected to this airflow. It will rotate, and at the same time drive the generator to rotate to generate electricity. Steam turbine DEH speed control is an important link in the power generation process of thermal power units, and the traditional PID control method is usually used. The traditional PID control method is based on the engineer's experience to manually adjust the PID parameters, so the result error is relatively large, and the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B11/42
CPCG05B11/42
Inventor 朱正林张欢崔晓波张冕熊永旭
Owner NANJING INST OF TECH
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