A Control Method for Robust Coordination of Static Synchronous Compensator and Generator Excitation

A technology of static synchronous compensation and control method, which is applied in the direction of reactive power adjustment/elimination/compensation, electrical components, circuit devices, etc., and can solve the problems of unknown disturbance influence, parameter uncertainty, etc.

Active Publication Date: 2020-11-17
XI'AN POLYTECHNIC UNIVERSITY
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  • Abstract
  • Description
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Problems solved by technology

[0003] The purpose of the present invention is to provide a control method for the robust coordination of STATCOM and generator excitation, which solves the parameter uncertainty and unknown disturbance affecting the system in the coordinated control system of generator excitation and STATCOM (STATCOM) stability problem

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  • A Control Method for Robust Coordination of Static Synchronous Compensator and Generator Excitation
  • A Control Method for Robust Coordination of Static Synchronous Compensator and Generator Excitation
  • A Control Method for Robust Coordination of Static Synchronous Compensator and Generator Excitation

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Embodiment

[0182] In order to verify the static synchronous compensator (STATCOM) and generator excitation robust backstepping adaptive coordinated control method (BACC) of the present invention, the state input is subjected to uncertain parameters θ and uncertain disturbance w 1 、w 2 、w 3 The control effect under the influence is verified by simulation. Among them, the stand-alone infinite system (SMIB) such as figure 1 As shown, the generator with excitation equipment is connected to the transmission line with circuit breaker through the transformer, and the STATCOM is installed at the midpoint of the line, which is also the access point that can improve the transmission energy of the system and effectively increase the transmission capacity and distance .

[0183] The parameter of SMIB and the parameter in the coordinated control system mathematical model of static synchronous compensator of the present invention and generator excitation are chosen as follows: H=5.9, V L = 1.0, E'...

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Abstract

The invention discloses a control method for the robust coordination of static synchronous compensator and generator excitation. Firstly, a mathematical model of STATCOM and generator excitation coordination control with uncertain parameters and unknown disturbances is established. Then, in the In the system, design the parameter adaptive law based on the I&I adaptive control method to identify the damping coefficient of the system and use the backstepping method to reduce the order of the system, construct the dissipation inequality of the subsystem, and design based on the satisfaction of the inequality Subsystem virtual control law, combined with L 2 gain suppression theory to eliminate modeling as L 2 The influence of the space unknown function on the stability of the subsystem ensures the robustness of the system. The method disclosed by the invention solves the problem of parameter uncertainty and unknown disturbance affecting the system stability in the coordinated control system of generator excitation and static synchronous compensator. Compared with the existing method, it can respond quickly, and the curve convergence speed is fast, and the improvement the transient performance of the system.

Description

technical field [0001] The invention belongs to the technical field of electric power systems, and in particular relates to a control method for a static synchronous compensator and a generator excitation robust coordination. Background technique [0002] Flexible AC Transmission System (FACTS), as one of the advanced technologies to effectively improve the stability of the interconnected grid, is an important part of the intelligent transmission link in the construction of my country's smart grid. Static synchronous compensator (STATCOM), as a main FACTS device, has superior performances such as reducing losses, stabilizing voltage, reducing harmonics, and improving system transient stability. On the one hand, the research on the control strategy of STATCOM devices has always been the focus of scholars; on the other hand, generator excitation is a traditional solution to power system stability problems and an effective means to implement new control methods. Therefore, for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/01H02J3/18
CPCH02J3/18H02J3/01H02J2203/20Y02E40/10Y02E40/40
Inventor 张蕾孙崧强李鹏飞杜超凡朱家豪
Owner XI'AN POLYTECHNIC UNIVERSITY
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