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Static synchronous compensator and generator excitation robust coordination control method

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

Active Publication Date: 2019-07-19
XI'AN POLYTECHNIC UNIVERSITY
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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

Method used

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  • Static synchronous compensator and generator excitation robust coordination control method
  • Static synchronous compensator and generator excitation robust coordination control method
  • Static synchronous compensator and generator excitation robust coordination control method

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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 static synchronous compensator and generator excitation robust coordination control method; the method comprises the following steps that an STATCOM and generator excitationcoordination control mathematical model containing uncertain parameters and unknown disturbance is established; then, in a system containing uncertain parameters, a parameter self-adaptation law basedon an I&I adaptive control method is designed to recognize a damping coefficient of a system, and the system is subjected to reduction by adopting a reverse-step method, so that a dissipation inequality of a subsystem is constructed; a virtual control law of the subsystem is designed by taking a condition that the inequality is met as basis; and the influence to the stability of an L2 space unknown function caused by modeling is suppressed by combination of an L2 gain theory, so that the robustness of the system is ensured. The method disclosed by the invention solves the problems of influence of parameter uncertainty and unknown disturbance to system stability existing in a generator excitation and static synchronous compensator coordination control system; and compared with an existingmethod, the method has the advantages that the response can be quickly responded, the curve convergence speed is high, and the transient performance of the system is improved.

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 Applications(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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