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Static var compensator control method based on robust self-adaptive evaluation design

A static reactive power compensation, robust adaptive technology, applied in adaptive control, reactive power compensation, reactive power adjustment/elimination/compensation and other directions, can solve the problem of poor convergence speed and overshoot, poor robustness, inability to Power system security, stability control and other issues

Active Publication Date: 2019-08-27
NORTHEASTERN UNIV
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Problems solved by technology

[0004] However, the existing static var compensator control methods do not fully consider the model uncertainty of the power system containing the static var compensator and the problem of being affected by external unknown disturbances. The safety and stability control of the power system of the power compensator has poor robustness and poor performance in terms of convergence speed and overshoot

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  • Static var compensator control method based on robust self-adaptive evaluation design
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  • Static var compensator control method based on robust self-adaptive evaluation design

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Embodiment Construction

[0147] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0148] like figure 1 Shown is a flow chart of the static var compensator control method based on the robust adaptive evaluation design of the present invention. The static var compensator control method based on robust adaptive evaluation design of the present invention is characterized in that it comprises the following steps:

[0149] Step 1: Establish the mathematical model of the single-unit infinite power system with static var compensator as

[0150]

[0151] in, x respectively 1 、x 2 、x 3 Derivative along time t, x 1 = δ - δ 0 , x 2 =ω-ω 0 , x 3 =B SVC -B SVC0 , k 1 = ω 0 / H,k 2 = ω 0 E' q V s / H,k 3 =1 / T c , θ=-D / H; δ is the generator rotor power angle, ω is the generator rotor angular velocity, B SVC is the equivalent susceptance of the power system, δ 0 is the steady-state value of generator rotor power angle...

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Abstract

The invention relates to the technical field of nonlinear control of electric power systems, and provides a static var compensator control method based on robust self-adaptive evaluation design. The method comprises the following steps of firstly, establishing a mathematical model of a single-machine infinite power system with a static var compensator; then designing a robust self-adaptive reverse-step control scheme based on neural network self-adaptive evaluation: starting a step-back control process from a first-order subsystem which is farthest from the actual control input, then performing a reverse-step control process from a second-order subsystem, and then deigning a control unit and an evaluation unit in the self-adaptive evaluation sequentially; and finally, performing stabilityproving of the electric power system on the basis of the lyapunov method, so that the design of the control scheme is further carried out while the consistent final bounded performance of the electricpower system is ensured. According to the method, the safe and stable control of the electric power system containing the static var compensator can be realized, and high robustness is achieved.

Description

technical field [0001] The invention relates to the technical field of nonlinear control of power systems, in particular to a static var compensator control method based on robust adaptive evaluation design. Background technique [0002] Over the past few decades, the scale of power systems and large-area interconnected grids has grown rapidly, making power system structures such as generators, transmission lines, and flexible AC transmission equipment highly nonlinear and complex. Since the traditional linear control method and centralized control scheme can only deal with extremely small external disturbances near the operating point, and has poor economic factors, a variety of nonlinear control methods have been derived to make the power system safe and stable to run. [0003] Static Var Compensators are one of the most popular members of the FACT family and have become a remarkably effective tool for regulating bus voltage and reactive power in a cost-effective manner. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/18G05B13/04
CPCH02J3/18G05B13/04H02J2203/20Y02E40/30
Inventor 罗艳红赵胜楠杨东升周博文张馨文
Owner NORTHEASTERN UNIV
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