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Composite PID fuzzy control method applied to transformer cooling system

A technology of fuzzy control and cooling system, applied in the direction of adaptive control, general control system, non-electric variable control, etc., can solve the problem that the parameter change process cannot be adjusted in real time

Inactive Publication Date: 2015-01-14
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0004] In order to overcome the deficiencies of traditional controllers and control methods in the control of distributed parameter systems and improve the control performance of distributed parameter systems, the purpose of this invention is to provide a compound PID fuzzy control method applied to transformer cooling systems to solve the problem of conventional PID The problem that the controller cannot adjust parameters in real time and control the process of parameter changes

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  • Composite PID fuzzy control method applied to transformer cooling system
  • Composite PID fuzzy control method applied to transformer cooling system
  • Composite PID fuzzy control method applied to transformer cooling system

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Embodiment Construction

[0028] refer to figure 1 , the control method of the present invention comprises the following steps:

[0029] Step S101, obtaining a temperature value through a thermometer;

[0030] Step S102, calculate the input quantity deviation E and deviation change EC, and fuzzify after quantization;

[0031] Step S103, calculating the fuzzy control table, checking the fuzzy control table to obtain the fuzzy control amount;

[0032] Step S104, find the actual control quantity , , , and as the input of PID;

[0033] Step S105, find the control quantity , and output to the inverter.

[0034] In the step S101, a temperature value is obtained by a temperature measuring instrument, specifically, the temperature value is the transformer oil temperature measured in real time by the temperature measuring instrument.

[0035] The step S102 is to calculate the input deviation E and the deviation change EC, quantify and then fuzzify, specifically, compare the transformer oil temperature...

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Abstract

The invention discloses a composite PID fuzzy control method applied to a transformer cooling system. The method comprises the following steps of obtaining a temperature value through a thermodetector; solving input quantity deviation E and deviation change EC, performing fuzzification after quantization; calculating a fuzzy control table, and checking the fuzzy control table to obtain the fuzzy control quantity; solving the practical control quantities , and , and making the ,the and the serve as the input quantities of PID; solving the control quantity y(t) and outputting the control quality to a frequency converter. According to the composite PID fuzzy control method applied to the transformer cooling system, the fuzzy control and the PID control are combined, the fuzzy control is introduced on the basis of the conventional PID control to form the composite PID fuzzy control method, the dynamic response speed is increased by utilizing the proportional control of PID, and steady state errors are eliminated by utilizing the integral control of PID, so that the steady-state performance of the fuzzy control is improved, and the energy-saving effect of the operation of the transformer cooling system is further improved.

Description

technical field [0001] The invention belongs to the technical field of power grid and automation design, and in particular relates to a composite PID fuzzy control method applied to a transformer cooling system. Background technique [0002] Transformers are important equipment in power plants and substations. With the continuous expansion of the scale of the power system and the improvement of the voltage level, the total capacity of transformers in the current power system has reached 9-10 times the total capacity of power generation. Therefore, whether the transformer can operate safely and stably is directly related to the reliability of industrial, agricultural and civilian power supply. According to research, every 6°C increase in transformer winding temperature will shorten the service life by half, so it is extremely necessary to monitor and cool the transformer in real time. [0003] At present, the configuration of cooling devices for large-scale power transforme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04G05D23/00
Inventor 陈洪涛任洪民赵建明项福军佟辉
Owner STATE GRID CORP OF CHINA
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