Power quality controller voltage stability control method and device based on robust residual generator

A technology for power quality and voltage stability, applied in circuit devices, AC network voltage adjustment, electrical components, etc., can solve the problems of many adjustable parameters, complex evaluation signals of voltage robust controllers, and difficulty in obtaining optimization effects, and achieve the guarantee The effect of stability

Active Publication Date: 2021-12-28
UNIV OF SCI & TECH BEIJING +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the evaluation signal of the voltage robust controller of the existing algorithmic microgrid system is relatively complex, and there are many adjustable parameters, and the parameter tuning is difficult, and it is difficult to obtain high-quality optimization results.

Method used

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  • Power quality controller voltage stability control method and device based on robust residual generator
  • Power quality controller voltage stability control method and device based on robust residual generator
  • Power quality controller voltage stability control method and device based on robust residual generator

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Effect test

Embodiment 1

[0053] In step S110, a control framework of a power quality controller based on a stability controller and a compensation controller may be constructed, the compensation controller including an observer-based residual generator and a parameter matrix.

[0054] In the embodiment of this example, the method also includes:

[0055] Construct a control architecture of a power quality controller based on a stability controller and a compensation controller, the compensation controller includes an observer-based residual generator and a parameter matrix, and generates a state space expression of the residual generator

[0056]

[0057] Among them, e x is the state variable of the residual generator, for e x The differential of , x and w are the state quantity and disturbance input quantity of the standard plant respectively, A, C and E are the system matrix, output matrix and disturbance input matrix of the standard plant respectively, and L is the observer gain matrix.

[00...

Embodiment 2

[0072] Step 1, plug and play robust fault-tolerant control structure design

[0073] Step 1.1: Robust Residual Generator Based Control Architecture

[0074] Given the control loop of the plant G(s) and a control signal u provided by the existing controller K(s) 0 , the control loop is internally stable, then all internally stable controllers can be parameterized as:

[0075] u(s)=u 0 (s)+Q(s)r(s) (1)

[0076] In the formula: Q(s) is also called the compensation controller matrix, is the residual matrix generated by the perturbation.

[0077] If the original system is closed-loop stable, the introduction of Q(s) can still ensure the stability of the system. While enhancing the robustness of the closed-loop system, Q(s) does not affect the pre-designed tracking performance, and the output of Q(s) is directly superimposed on the output of the controller, which has a simple structure and does not need to change the parameters of the original controller. Improve system respo...

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Abstract

The invention relates to a power quality controller voltage stability control method and device based on a robust residual generator, electronic equipment and a storage medium. The method comprises the following steps: constructing a control architecture of an electric energy quality controller based on a stability controller and a compensation controller; generating a transfer function of the compensation controller based on model matching, and performing order reduction on the transfer function of the compensation controller to generate an analytic functional expression of a first-order compensation controller; performing gradient descent optimization on the analytic functional expression of the first-order compensation controller of the compensation controller based on a gradient descent objective function, and generating a convergence-optimized power quality control system output equation based on the robust residual generator. According to the invention, the compensation controller with a plug-and-play function is configured, the overall stability of the system is ensured under the condition that the controller and the configuration thereof are not changed, and online better disturbance suppression is realized.

Description

technical field [0001] The present disclosure relates to the fields of new energy storage, power supply and distribution, and in particular, relates to a robust residual generator-based power quality controller voltage stability control method, device, electronic equipment, and computer-readable storage medium. Background technique [0002] In recent years, with the increasingly serious global climate problem and the continuous depletion of fossil energy, the research on new energy has attracted more and more scholars' attention. With a high proportion of distributed energy connected to the grid, large-scale application of electric vehicle charging piles, rapid development of energy storage technology, and continuous improvement of users' requirements for power supply quality, the large-scale access of power electronic inverter devices of various types and different voltage levels has become a trend. The inevitable trend. The three-phase inverter is the key power electronic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/18H02J3/28H02J3/14
CPCH02J3/381H02J3/388H02J3/18H02J3/28H02J3/144H02J2203/20H02J2300/20Y02B70/3225Y04S20/222
Inventor 罗珊娜彭开香胡长斌周京华朴政国景柳铭
Owner UNIV OF SCI & TECH BEIJING
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