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Passive robustness control method

A control method and passive robust technology, applied in the electrical field, can solve problems such as difficulty in achieving global consistency, and achieve the effect of enhancing stability

Active Publication Date: 2017-10-13
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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Problems solved by technology

[0005] This application provides a passive robust control method to solve the current difficulty in achieving global consistency in power systems containing doubly-fed induction generators

Method used

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Embodiment Construction

[0021] see figure 1 , a flowchart of a passive robust control method provided in an embodiment of the present application. The method includes:

[0022] Step 100: Acquire three characteristics in the power system, where the three characteristics include: system nonlinearity a(x), parameter uncertainty b(x) and wind speed randomness d(t);

[0023] Step 200: Aggregate the three characteristics to obtain a disturbance ψ(x, u, t);

[0024] Step 300, introduce virtual state x n+1 characterize the perturbation ψ(x, u, t);

[0025] Step 400, introducing a disturbance observer to estimate the disturbance after the characterization in real time;

[0026] Step 500, introduce a robust passive controller to compensate for the disturbance after the real-time estimation, and control the output of active power and reactive power of the doubly-fed induction generator in the power system, so that the generator is in the process of voltage drop. After neutralizing the voltage drop, keep ru...

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Abstract

The invention discloses a passive robustness control method. The method comprises the steps of acquiring three features in a power system, wherein the three features comprises a system nonlinearity a(x), parameter uncertainty b(x), and wind speed randomness d(t); combining the three features, so as to obtain disturbance Psi(x, u, t); introducing a virtual state xn+1 to represent the disturbance Psi(x, u, t); introducing a disturbance observer, and estimating the represented disturbance in real time; and introducing a robustness passive controller, compensating the disturbance estimated in real time, and controlling output of active power and reactive power of a double-feed induction generator in the power system. The method is applied to the power system containing the double-feed induction generator. When the power system containing the double-feed induction generator is disturbed, the output of the active power and reactive power of the double-feed induction generator is adjusted based on the robustness passive control of the disturbance observer, so as to make the power system more stable.

Description

technical field [0001] The present application relates to the field of electrical technology, and in particular, to a passive robust control method. Background technique [0002] In recent years, due to the surge in global electricity demand and the limited reserves of fossil fuels and their detrimental impact on the environment, the need for renewable energy has grown in countries around the world. Wind energy is a kind of green, pollution-free energy with huge reserves in nature. Therefore, wind power generation accounts for an increasing proportion in the power system. With the large-scale grid connection of wind farms, it is crucial to ensure and enhance the stability of the power system. [0003] There are many methods used in the prior art to enhance the stability of the power system. From the control point of view, there are feedback linearization control, sliding mode adaptive inverse control, fuzzy logic control, control based on Lyapunov function, etc.; from the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/24
CPCH02J3/00H02J3/24H02J2203/20
Inventor 李胜男吴水军何廷一彭俊臻陈勇刘明群周鑫张丽
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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