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Disturbance observer-based aviation three-stage variable frequency alternating current power generation system voltage stability control method

A technology of disturbance observer and power generation system, which is applied to control generators, control systems, and generators through magnetic field changes. It can solve the problems of delay in calculation amount and unsatisfactory compensation effect, and achieve high steady-state accuracy and small delay. , the effect of improving the response speed

Active Publication Date: 2020-11-24
NORTHWESTERN POLYTECHNICAL UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, on the one hand, the above-mentioned scheme compensates the voltage regulation by PI control, but the compensation effect is not ideal; At the very beginning of the load change, if the system feedback control is carried out at the first time, the regulation effect will be more stable, and at the same time, the impact on the electrical equipment due to voltage instability will be minimized

Method used

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  • Disturbance observer-based aviation three-stage variable frequency alternating current power generation system voltage stability control method
  • Disturbance observer-based aviation three-stage variable frequency alternating current power generation system voltage stability control method
  • Disturbance observer-based aviation three-stage variable frequency alternating current power generation system voltage stability control method

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Embodiment 1

[0031] In the case of different frequencies and different loads, the voltage regulation system of the generator is unstable, and a proportional-integral controller is added to the system to improve the stability of the system. The controller realizes the stable control of the voltage through quick response by receiving the analog signal when the starter generator is working. The input signal of the controller in the present invention is the effective value obtained by instantaneous calculation of the three-phase voltage, and the reference value is the voltage regulation point of the effective value of the three-phase voltage. After the error is obtained, the system adjustment value is obtained through the proportional integral controller, which is input into the controlled object to realize the control of the power generation state of the generator.

[0032] The disturbance observer can effectively estimate and compensate lumped disturbances, including model uncertainty, param...

Embodiment 2

[0044] The three stages of the three-stage frequency conversion AC power generation system are the permanent magnet machine, the exciter and the main generator; PWM is used to adjust the excitation current of the excitation circuit to realize the regulation of the generator voltage;

[0045] The voltage regulation method is to detect that the input signal is the effective value Ut calculated by the instantaneous value of the three-phase voltage at the load end, and set the reference value as the three-phase voltage effective value voltage regulation point U0; after calculating the error between Ut and U0, input it into the ratio Integral controller to obtain the first adjustment value of the system;

[0046] The input value of the disturbance observer is the instantaneous value of the three-phase voltage at the load end and the first adjustment amount of the above system, and the value of the second adjustment amount obtained by inversely transforming the nominal function under...

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Abstract

The invention relates to a disturbance observer-based aviation three-stage variable-frequency alternating-current power generation system voltage stability control method. A proportional-integral controller is used as a controller main body, so that the response speed of the system is increased; according to the design of the controller based on the disturbance observer, disturbance caused by loadand frequency changes can be effectively restrained, the voltage regulating system can accurately reach the steady state, high steady state precision is achieved, and meanwhile the steady state can be rapidly restored when disturbance occurs. According to the invention, voltage pre-regulation control is carried out, voltage regulation is carried out on the system before the load of the system changes, the time difference of load starting is adjusted, the influence caused by the calculation delay of the system is well compensated, and in addition, the set delay is very small, so that the use of electric equipment is basically not influenced.

Description

technical field [0001] The invention relates to the fields of electrical equipment and electrical engineering, in particular to a voltage stability control method for a high-voltage frequency-variable AC three-stage power generation system applied in the field of civil aviation based on a disturbance observer. Background technique [0002] With the development of more electric aircraft, the modern frequency conversion airborne power generation system is gradually adopted by modern aircraft due to its superior performance, but its wide range of frequency changes makes the traditional analog generator control unit (Generator Control Unit, GCU) unable to Effectively control the output of the variable frequency power supply to reduce the power supply performance of the variable frequency power supply. [0003] The modern frequency conversion airborne power generation system is a nonlinear system, which has inevitable and unmeasurable disturbances and parameter changes, and is al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P9/30H02P101/30
CPCH02P9/305H02P2101/30
Inventor 李伟林冯首鸿陶育菲樊显绒徐梓潇王雨峰相毅
Owner NORTHWESTERN POLYTECHNICAL UNIV
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