Energy outer loop control method for uncontrolled rectifying capacitor of electrically excited direct-current synchronous generator

Abstract

The invention discloses an energy outer loop control method for an uncontrolled rectifier capacitor of an electrically excited DC synchronous generator, and the method achieves the indirect control ofa DC-side voltage through the feedback of capacitor energy state information through an energy storage link, i.e., a rectifier bridge DC-side filter capacitor. On the basis of considering the rotating speed and the load, a proportional link between the output current and the exciting current is introduced, so that parameter adaptation of the generator under different working conditions is realized. The method comprises the following steps of: performing capacitance energy outer loop control by taking energy stored by an uncontrolled rectifier bridge filter capacitor as an adjusting object; solving a proportional link of the relationship between the output current and the exciting current under different working conditions; and performing excitation current inner loop control by taking theexcitation current as an adjustment object. The method can achieve the stable control of the DC output voltage of the synchronous generator, accelerates the dynamic adjustment process when the DC side load of the generator changes, is very high in adaptability to different working conditions, can maintain the relative stability of the DC side output voltage, and improves the dynamic performance of a power supply system.

Description

technical field [0001] The invention relates to a control method for an uncontrolled rectification capacitor energy outer loop of an electrically excited DC synchronous generator, which belongs to the technical field of electrical control. Background technique [0002] The electric excitation DC synchronous generator contains the armature winding and the field winding. The output control of the generator can be realized by adjusting the excitation current of the excitation winding. The armature winding is rectified by an uncontrolled rectifier to output a DC voltage. Because the electrically excited DC synchronous generator has outstanding advantages such as simple structure, high reliability, low cost, and easy fault de-excitation, it is especially suitable for applications in high-speed and harsh environments such as aviation power supplies. [0003] The generator is the core component of the aviation power supply system, and the aviation power supply system has high req...

AI Technical Summary

Problems solved by technology

[0005] Second, the electrical equipment in the aviation power supply system often has violent sudden loading and unloading actions, resulting in severe voltage fluctuations

[0006] Third, the speed range of the aero-generator is large, which causes the parameters of the motor to change at different speeds, making it difficult to select control parameters suitable for the entire speed range

[0007] The special working conditions of the aeronautical excitation DC synchronous generator make the control of the generator more difficult, resulting in a longer dynamic adjustment time, larger voltage fluctuations during dynamic adjustment, and deterioration of the control effect when the speed changes.

[0008] In the existing technology, the control method for the electric excitation DC synchronous generator has the disadvantages of slow dynamic adjustment speed, large dynamic voltage fluctuation, and poor adaptability to speed changes, which cannot meet the dynamic characteristics of the electric excitation DC synchronous generator in the aviation power supply system. requirements and wide speed range requirements

Images